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This summary provides an overview of how new therapies or new aspects of established therapies relate to the latest findings. Neoadjuvant therapy, local therapy, new aspects of systemic therapy, and prognostic and predictive factors are presented. In the neoadjuvant setting, the association between pathological complete response (pCR) and prognosis is still of interest as is the identification of new molecular predictors for new therapies such as CDK4/6 inhibitors. As regards surgical treatment, the target is still to reduce the aggressiveness of surgery. To achieve this, a better understanding particularly of ductal carcinoma in situ is required. With regard to systemic therapy, more data on the best combinations and therapy sequences for existing therapies is available. Finally, the use of prognostic and predictive factors may help to avoid overtreatment and ensure that patients only receive therapies which have been shown to be effective for their specific condition and have fewer side effects.
In dieser Übersichtsarbeit wird dargestellt, wie neue Therapien oder neue Aspekte etablierter Therapien in Zusammenhang mit neuesten, aktuellen Erkenntnissen stehen. Neoadjuvanz, Lokaltherapie, neue Aspekte der Systemtherapie und Prognose- sowie Prädiktivfaktoren werden beleuchtet. In der Neoadjuvanz ist nach wie vor der Zusammenhang zwischen pCR und Prognose von Interesse, ebenso wie neue molekulare Prädiktoren für neue Therapien wie CDK4/6-Inhibitoren zu identifizieren. Bei der operativen Behandlung wird weiter nach einer Reduktion der Aggressivität gestrebt. Insbesondere das duktale Carcinoma in situ muss dafür noch besser verstanden werden. Bei den Systemtherapien wächst die Datenlage zum Verständnis der besten Kombinationen und Therapieabläufe für bestehende Therapieverfahren. Letztendlich muss mithilfe von Prognose- und Prädiktivfaktoren vermieden werden, dass Übertherapien stattfinden und nur die Patientin spezifische Therapien erhält, welche bei dieser individuellen Patientin eine nachgewiesene Wirksamkeit mit wenig Nebenwirkungen haben.
Introduction: This study reports about antenatal characteristics of Roma minority population. The study was designed to investigate data about health behaviours known to be associated with reproductive outcomes of Roma women that have very good living conditions and relatively high resource availability.
Methods: A retrospective study included 204 Roma and 408 non-Roma hospitalised singleton births that occurred in the Maternity Ward of the General Hospital Virovitica in the period from 1991 to 2010. Data about women’s age, marital status, smoking, reproductive health (abortions, delivery), antenatal care, perinatal complications and gestational age were taken from hospital records and analysed.
Results: Roma women were averagely more than three years younger than non-Roma women, only 10.8% were married. Smoking was more frequent. The average number of births of Roma and non-Roma women was similar, averagely two children per woman. The rate of induced abortions in the Roma women was higher, while the frequency of spontaneous abortions was equal. Inadequate antenatal care of Roma women was associated with two times higher incidence of perinatal complications. A higher frequency of deliveries at home without professional assistance in Roma pregnancy resulted in lower perinatal outcomes. It was confirmed that Roma mothers give birth earlier (38+6 vs. 39+4 weeks) and have a higher incidence of premature births (9.3% vs. 2.2%).
Conclusions: In the comparison of antenatal parameters between the two researched groups, poorer prenatal outcomes in the Roma population were found, despite full integration and considerable improvement in living standards of this ethnic Roma population.
A recent report showed PINK1 transcript levels to be up- or down-regulated by the gain or loss of Ataxin-2 function, respectively, in human blood, in a human neural cell line and in mouse tissues. These observations may have profound implications for the regulation of cell growth and may be medically exploited for the treatment of cancer and neural atrophy...
Ataxin-2 (human gene symbol ATXN2) acts during stress responses, modulating mRNA translation and nutrient metabolism. Ataxin-2 knockout mice exhibit progressive obesity, dyslipidemia, and insulin resistance. Conversely, the progressive ATXN2 gain of function due to the fact of polyglutamine (polyQ) expansions leads to a dominantly inherited neurodegenerative process named spinocerebellar ataxia type 2 (SCA2) with early adipose tissue loss and late muscle atrophy. We tried to understand lipid dysregulation in a SCA2 patient brain and in an authentic mouse model. Thin layer chromatography of a patient cerebellum was compared to the lipid metabolome of Atxn2-CAG100-Knockin (KIN) mouse spinocerebellar tissue. The human pathology caused deficits of sulfatide, galactosylceramide, cholesterol, C22/24-sphingomyelin, and gangliosides GM1a/GD1b despite quite normal levels of C18-sphingomyelin. Cerebellum and spinal cord from the KIN mouse showed a consistent decrease of various ceramides with a significant elevation of sphingosine in the more severely affected spinal cord. Deficiency of C24/26-sphingomyelins contrasted with excess C18/20-sphingomyelin. Spinocerebellar expression profiling revealed consistent reductions of CERS protein isoforms, Sptlc2 and Smpd3, but upregulation of Cers2 mRNA, as prominent anomalies in the ceramide–sphingosine metabolism. Reduction of Asah2 mRNA correlated to deficient S1P levels. In addition, downregulations for the elongase Elovl1, Elovl4, Elovl5 mRNAs and ELOVL4 protein explain the deficit of very long-chain sphingomyelin. Reduced ASMase protein levels correlated to the accumulation of long-chain sphingomyelin. Overall, a deficit of myelin lipids was prominent in SCA2 nervous tissue at prefinal stage and not compensated by transcriptional adaptation of several metabolic enzymes. Myelination is controlled by mTORC1 signals; thus, our human and murine observations are in agreement with the known role of ATXN2 yeast, nematode, and mouse orthologs as mTORC1 inhibitors and autophagy promoters.
The interdependence of selective cues during development of regulatory T cells (Treg cells) in the thymus and their suppressive function remains incompletely understood. Here, we analyzed this interdependence by taking advantage of highly dynamic changes in expression of microRNA 181 family members miR-181a-1 and miR-181b-1 (miR-181a/b-1) during late T-cell development with very high levels of expression during thymocyte selection, followed by massive down-regulation in the periphery. Loss of miR-181a/b-1 resulted in inefficient de novo generation of Treg cells in the thymus but simultaneously permitted homeostatic expansion in the periphery in the absence of competition. Modulation of T-cell receptor (TCR) signal strength in vivo indicated that miR-181a/b-1 controlled Treg-cell formation via establishing adequate signaling thresholds. Unexpectedly, miR-181a/b-1–deficient Treg cells displayed elevated suppressive capacity in vivo, in line with elevated levels of cytotoxic T-lymphocyte–associated 4 (CTLA-4) protein, but not mRNA, in thymic and peripheral Treg cells. Therefore, we propose that intrathymic miR-181a/b-1 controls development of Treg cells and imposes a developmental legacy on their peripheral function.
B-cell development and function depend on stage-specific signaling through the B-cell antigen receptor (BCR). Signaling and intracellular trafficking of the BCR are connected, but the molecular mechanisms of this link are incompletely understood. Here, we investigated the role of the endosomal adaptor protein and member of the LAMTOR/Ragulator complex LAMTOR2 (p14) in B-cell development. Efficient conditional deletion of LAMTOR2 at the pre-B1 stage using mb1-Cre mice resulted in complete developmental arrest. Deletion of LAMTOR2 using Cd19-Cre mice permitted analysis of residual B cells at later developmental stages, revealing that LAMTOR2 was critical for the generation and activation of mature B lymphocytes. Loss of LAMTOR2 resulted in aberrant BCR signaling due to delayed receptor internalization and endosomal trafficking. In conclusion, we identify LAMTOR2 as critical regulator of BCR trafficking and signaling that is essential for early B-cell development in mice.
At present, there are no quantitative, objective methods for diagnosing the Parkinson disease. Existing methods of quantitative analysis by myograms suffer by inaccuracy and patient strain; electronic tablet analysis is limited to the visible drawing, not including the writing forces and hand movements. In our paper we show how handwriting analysis can be obtained by a new electronic pen and new features of the recorded signals. This gives good results for diagnostics. Keywords: Parkinson diagnosis, electronic pen, automatic handwriting analysis
OBJECTIVE: To compare efficacy, safety, and tolerability of an oral enzyme combination (OEC) containing proteolytic enzymes and bioflavonoid vs diclofenac (DIC), a nonselective nonsteroidal anti-inflammatory drug in the treatment of osteoarthritis of the knee.
MATERIALS AND METHODS: This was an individual patient-level pooled reanalysis of patient-reported data from prospective, randomized, double-blind, parallel-group studies in adult patients with moderate-to-severe osteoarthritis of the knee treated for at least 3 weeks with OEC or DIC. Appropriate trials were identified with a systemic literature and database search. Data were extracted from the original case-report forms and reanalyzed by a blinded evaluation committee. The primary end point was the improvement of the Lequesne algofunctional index (LAFI) score at study end vs baseline. Secondary end points addressed LAFI response rates, treatment-related pain-intensity changes, adverse events, and laboratory parameters.
RESULTS: Six trials were identified that enrolled in total 774 patients, of whom 759 had post-baseline data for safety analysis, 697 (n=348/349 with OEC/DIC) for intent to treat, 524 for per protocol efficacy analysis, and 500 for laboratory evaluation. LAFI scores - the primary efficacy end point - decreased comparably with both treatments and improved with both treatments significantly vs baseline (OEC 12.6±2.4 to 9.1±3.9, DIC 12.7±2.4 to 9.1±4.2, effect size 0.9/0.88; P<0.001 for each). In parallel, movement-related 11-point numeric rating-scale pain intensity improved significantly (P<0.001) and comparably with both treatments from baseline (6.4±1.9/6.6±1.8) to study end (3.8±2.7/3.9±2.5). Overall, 55/81 OEC/DIC patients of the safety-analysis population (14.7%/21.1%, P=0.022) reported 90/133 treatment-emergent adverse events, followed by premature treatment discontinuations in 22/39 patients (5.9%/10.2%, P=0.030). Changes in laboratory parameters were significantly less with OEC vs DIC: on average 18.8% vs 86.3% of patients presented a decrease with respect to hemoglobin, hematocrit, or erythrocyte count (P<0.001), and 28.2% vs 72.6% showed an increase in AST, ALT, or GGT (P<0.001).
CONCLUSION: When compared with DIC, OEC showed comparable efficacy and a superior tolerability/safety profile associated with a significantly lower risk of treatment-emergent adverse events, related study discontinuations, and changes in laboratory parameters.
Die HAART hat einen Durchbruch in der Therapie der HIV-Infektion bewirkt und so zu einer drastischen Senkung der Mortalität und Morbidität geführt. Um diesen Ansprüchen weiterhin gerecht zu werden und sie bestenfalls zu übertreffen, erfordert eine ständige Weiterentwicklung der HAART mit neuen und ausgefeilteren Alternativen. Ein weiterer Schritt in diese Richtung ist die Entwicklung einer neuen Formulierung des Kombinationspräparates LPV/r (Kaletra®) von der „lipophilen Kapselform“ zur „hydrophilen Tablettenform“, aus der Wirkstoffgruppe der Proteasehemmer. Lopinavir (LPV) ist ein HIV-Proteasehemmer der mit Ritonavir (r oder RTV) als fixe Kombination (LPV/r) hergestellt wird. Der Proteasehemmer Ritonavir wird dabei in subtherapeutischer Dosierung als Booster verwendet, dadurch wird eine Verbesserung der pharmakokinetischen Eigenschaften erzielt. Der Vorteil hierbei sind die höheren Lopinavir-Plasmaspiegel die erreicht werden. Diese Kombination wird als Kaletra® (LPV/r) vermarktet.
LPV/r ist erhältlich als lipophile Kapselform (133,3/33,3mg) oder in Flüssigform (80/20mg pro ml). Beide erfordern eine kühle Lagerung und müssen mit einer fettreichen Mahlzeit eingenommen werden, um optimale Lopinavir Plasmaspiegel zu erzielen.
Durch das „Melt Extrusion (Meltrex)“ Produktionsverfahren gelang die Herstellung einer „hydrophilen Tabletteform“ (200/50mg und 100/25mg) mit verbesserter Bioverfügbarkeit. Dadurch reduzierte sich die einzunehmende Anzahl von 6 Kapseln pro Tag auf 4 Tabletten pro Tag. Zudem bedarf die LPV/r Tablette keiner Kühlung und kann nahrungsunabhängig eingenommen werden.
Ziel dieser Untersuchung war es zu prüfen, welche LPV/r (Kaletra®) Darreichungsform, Kapsel oder Tablette, in einer HAART von HIV-Patienten bevorzugt wird. Es sollte ermittelt werden, ob bei gleichbleibender Wirksamkeit kombiniert mit einer verbesserten Verträglichkeit und Handhabung (weniger Tabletten, nahrungsunabhängige Einnahme und keine Kühlung), die überwiegende Mehrzahl der HIV-Patienten sich zugunsten der LPV/r Tablette, im Sinne einer verbesserten Lebensqualität bzw. Gemütszustandes, entscheiden werden.
Dies geschah anhand einer prospektiven, nicht randomisierten Studie mit 238 HIV-infizierten Patienten, die über mindesten 16 Wochen oder länger eine LPV/r Kapsel haltige antiretrovirale Kombinationstherapie einnahmen und am Tag 0 auf LPV/r Tabletten umgestellt wurden, ohne weitere Änderungen in ihrer bisherigen HAART vorzunehmen. Der darauffolgende Beobachtungszeitraum betrug 32 Wochen. Es wurden Vorher-, Nachher-Fragebogen ausgefüllt und die Patienten unterzogen sich einer Vorher-, Nachher-Laboruntersuchung (CD4 und HI-Viruslast). Zudem wurde nach der subjektiven Präferenz gegenüber beiden Darreichungsformen (Kapsel oder Tablette) gefragt.
Zusammenfassend lässt sich sagen, dass unter der LPV/r Tablette bei gleichbleibender antiretroviraler Wirksamkeit, signifikant weniger intestinale Nebenwirkungen auftraten und daran geknüpft signifikant weniger Medikamente gegen intestinale Beschwerden eingenommen wurden. Was bei den Patienten zu einer deutlichen Präferenz der LPV/r-Tablette (71,2 %) gegenüber der LPV/r Kapsel (3,0 %) führte. Die Ergebnisse zu Lebensqualität zeigten zwar eine tendenzielle Besserung aber zusammen mit den Gemütszuständen ergaben sich hier keine signifikanten Unterschiede.
Nach der vorliegenden Untersuchung muss die LPV/r Tablette im Vergleich zur LPV/r-Kapsel, als die überlegene antiretrovirale Therapieoption in Betracht gezogen werden. Angesichts zahlreicher Einschränkungen durch die Infektion und die Notwendigkeit einer lebenslangen Therapie, kann dies, ein bedeutender Beitrag zur Therapietreue sein und dadurch den Erfolg einer HIV-Therapie wesentlich mitbestimmen.
Das Forschungsziel dieser Arbeit war die Abklärung der Frage, ob sich in implantierten Intraokularlinsen der Marke Acrysof®, die in Deutschland kurz nach deren Markteinführung erworben wurden, Mikrovakuolen im Optikkörper befinden. Diese sogenannten Glistenings, die der Hersteller auf eine neuartige Verpackung zurückführte, welche ausschließlich in den Vereinigten Staaten Verwendung fand, führten in den USA zu Explantationen und zum Rückruf so verpackter Kunstlinsen dieses Typs. Unser Arbeitsprogramm umfaßte hauptsächlich die Untersuchung von Patienten, bei denen eine Acrysof®-Intraokularlinse implantiert wurde, an der Spaltlampe und anschließende Dokumentation mittels Fotospaltlampe. Zusätzlich wurden Sehschärfebestimmungen durchgeführt. Analog wurden Untersuchungen und Dokumentationen bei Patienten, denen im gleichen Zeitraum und vom gleichen Operateur eine herkömmliche PMMA-Kunstlinse implantiert wurde, durchgeführt. In allen untersuchten Intraokularlinsen des neuen Modells aus Acryl konnten Mikrovakuolen festgestellt und fotografisch dokumentiert werden. Diese Veränderungen konnten in keiner der PMMA-Kunstlinsen beobachtet werden. In unseren Ergebnissen fanden sich sonst durchgehend Hinweise auf die mittlerweile von anderen gewonnenen Erkenntnisse über die neue Linse. Es konnten keine Hinweise auf eine Visusminderung durch die Glistenings festgestellt werden. Die Analyse der Literatur ergab, daß nach dem heutigem Stand der Erkenntnisse über die Glistenings, von einer Flüssigkeitsaufnahme in den Optikkörper der IOL ausgegangen wird. Die Flüssigkeit sammelt sich in einige mikrometer großen Räumen in der Polymerstruktur der Kunstlinse. Diese Mikrovakuolen werden durch die Brechkraftdifferenz zwischen deren Inhalt und dem IOL-Material optisch sichtbar und erscheinen bei der Spaltlampenuntersuchung als multiple Glitzerpunkte. Experimentelle Arbeiten haben gezeigt, daß die Ausbildung der Mikrovakuolen durch Temperaturschwankungen und durch die Anwesenheit von Serum begünstigt wird. Ein verstärktes Vorkommen der Glistenings bei Patienten, bei denen sich durch Beeinträchtigung der Blut-Kammerwasser-Schranke oder der Blut-Retina-Schranke, Serumbestandteile im Kammerwasser befinden können, hier sind besonders Diabetiker zu nennen, wurde von einigen Autoren berichtet. Auch wir konnten bei einer nachträglichen Auswertung unserer Unterlagen Hinweise darauf finden, daß es bei solchen Patienten zur verstärkten Glisteningbildung kommt. Die Aussage der Herstellerfirma, die Glistenings hingen mit der neuartigen Verpackung und Sterilisation der IOLs in dem AcryPak-System, welches nur in den USA zum Einsatz kam und 1995 vom Markt genommen wurde, zusammen, wurde durch unsere Ergebnisse widerlegt. Besonders die frühere englischsprachige Literatur spiegelt einen Konsens mit der vom Hersteller vertretenen Auffassung wider. Neuere Arbeiten, die unsere Ergebnisse bestätigen weisen auf ein Poster auf einem Kongress 1999 in Seattle als erstes bekanntwerden von Glistenings in herkömmlich verpackten AcrySof®-IOL hin, obwohl schon frühere Berichte von Autoren aus Europa, auch von unserer Arbeitsgruppe, vorlagen. Die Mikrovakuolen haben nur in sehr seltenen Einzelfällen, bei denen es zu massenhaftem Vorkommen gekommen war, zu Beeinträchtigungen der Sehfunktionen geführt und eine Explantation erforderlich gemacht. Trotzdem sind weitere Forschungen, für die wir einige Ansätze vorschlagen, notwendig. Auch das Vorkommen von schwerwiegenden Trübungen bei anderen Kunstlinsentypen zeigt die Notwendigkeit für verstärkte Forschungen und gesetzliche Regulierungen auf diesem Gebiet. Insbesondere die hervorragend niedrigen Nachstarraten, die mit der Implantation von AcrySof®-Kunstlinsen einher gehen, berechtigen jedoch zu ihrer Weiterverwendung. Während es unwahrscheinlich scheint, daß die Glistenings noch schwerwiegende Probleme bereiten werden, so ist jedoch gesichert, daß durch die Verwendung von AcrySof®Kunstlinsen weniger YAG-Laser-Kapsulotomien notwendig sind. Daß sich damit auch die mit diesem Eingriff verbundenen Kosten und Komplikationen reduzieren ist selbstredend. Der Verlauf der Forschungen zu diesem Thema wird dargelegt. Die Notwendigkeit präziserer Studienaufbauten und besserer technischer Ausstattung wird deutlich. Durch den fortgeführten Einsatz der AcrySof®-IOL wurde die ophthalmologische Sichtweise der IOL verändert. Die IOL wird heute als Implantat betrachtet, welches die Aphakie korrigiert aber auch den Nachstar verhüten soll. Im kleinen Rahmen der Entwicklungsgeschichte der IOLs selbst, könnte dies den Beginn einer neuen IOL-Generation bedeuten.
Thalassämia major und Sichelzellanämie sind hereditäre Erkrankungen, die zu der Gruppe der quantitativen bzw. qualitativen Hämoglobinsynthesestörungen gehören und in unterschiedlichem Maße mit einer chronischen Anämie einhergehen. Dabei besteht die Therapie der Anämie in regelmäßigen Bluttransfusionen. Im Falle der Thalassämia major sind regelmäßige Bluttransfusionen alle 2-4 Wochen notwendig. Dabei übersteigt die damit zugeführte Eisenmenge bei weitem die Eisenausscheidungskapazität des Körpers, die limitiert und passiver Natur ist. Es kann dadurch zur Eisenüberladung des Körpers mit Erschöpfung der Eisenbindungskapazität und Nachweisbarkeit von freiem Eisen kommen. Freies Eisen generiert über die Fenton-Reaktion freie Radikale und reaktive Sauerstoffspezies, die ihrerseits in der Lage sind, biologische Moleküle sowie Zellstrukturen zu schädigen. Der Organismus verfügt über Mechanismen um diese Schäden zu verhindern bzw. den Ausmaß der Schäden zu begrenzen, die als antioxidativen Abwehrmechanismen bezeichnet werden. In dieser vorliegenden Arbeit wurden Blutproben von 22 Patienten mit ß-Thalassämia major und 16 Patienten mit Sichelzellanämie Patienten untersucht. Bei ihnen wurde das Vorliegen der pathologischen Modellsituation einer Eisenüberladung angenommen. Als Kontrollgruppe wurden 16 phänotypisch gesunde Geschwister der beiden Patientenkollektive herangezogen. Hauptziele dieser Arbeit war, die Bleomycin-Methode im Stoffwechsellabor des Zentrums für Kinderheilkunde und Jugendmedizin der Johann Wolfgang Goethe-Universität zu etablieren und dabei die folgenden Fragen zu klären: 1. Entsteht freies Eisen bei polytransfundierten Patienten? 2. Ist die Bleomycin-Assay zur Bestimmung des freien Eisens geeignet? 3. Welche Zusammenhänge bestehen zwischen den Parametern des Eisenstoffwechsels und können diese zur Abschätzung des freien Eisens genutzt werden? Freies Eisen entsteht dann, wenn die Eisenbindungskapazität des Transferrins überschritten wird. Bei gesunden Menschen liegt eine Transferrinsättigung im Durchschnitt bei unter 30%. Es ist also eine wertvolle Reserve vorhanden, um effektiv die Enstehung des freien Eisens zu verhindern. Bei bestimmten pathologischen Situationen, wie sie auch bei polytransfundierten Patienten bei Thalassämie vorliegen, wird dem Körper massiv Eisen zugeführt. Wir konnten bei 18 von 22 Patienten in der Thalassämiegruppe freies Eisen nachweisen. Der Median der freien Eisenkonzentration lag bei 1,25 μmol/l bei einer Spannbreite von 5,3μmol/l. In der Sichelzellanämiegruppe konnte nur bei einem Patienten freies Eisen nachgewiesen werden. Dieser hatte ebenfalls häufig Bluttransfusionen erhalten. Zur Messung des freien Eisens wurde die Bleomycin Methode nach Gutteridge et al angewandt. Es ist eine nasschemische Methode (Messung erfolgt via Spektroskopie) und erfordert keinen hohen technischen Aufwand. Da bei der Bestimmung des freien Eisens im mikromolaren Bereich geschieht, ist das Hauptproblem die Kontamination der Reagenzien durch das ubiquitär vorkommende Eisen. Durch höchste Sorgfalt und genaues Arbeiten im staubfreien Milieu und Behandlung der Reagenzien mit einem geeigneten Eisenkomplexbildner, wie z.B. Chelex100®, ist dieses Problem beherrschbar. Dennoch erfordert die Methode einen enormen Zeitaufwand, weshalb nach Parametern gesucht wurde, die zur Abschätzung oder zur Vorselektion der geeigneten Blutproben zur Bestimmung des freien Eisens herangezogen werden können. Wie oben schon erwähnt, hatten 18 von 22 Thalassämiepatienten freies Eisen im Blut. Davon hatten 15 eine Transferrinsättigung über 100% und 2 knapp unter 100%. Lediglich ein Patient, bei dem aber auch nur freies Eisen von 0,05 μmol/l gemessen wurde, hatte eine Transferrinsättigung deutlich unter 100%. Ein Patient aus der Sichelzellanämiegruppe, bei dem auch freies Eisen gemessen wurde, hatte ebenfalls eine Transferrinsättigung über 100%. Zusammenfassend kann festgehalten werden, dass eine hoch signifikante positive Korrelation zwischen dem freien Eisen und der Transferrinsättigung festegestellt wurde (r = 0,63, p = 0,002). 95% der Patienten, die freies Eisen im Blut hatten, wiesen auch Transferrinsättigungswerte über bzw. knapp unter 100% auf. Es besteht auch ein statistisch signifikanter positiver Zusammenhang zwischen der Serumeisenkonzentration und freiem Eisen. Alle Patienten mit freiem Eisen im Blut hatten Serumeisenwerte über 170 μg/dl. Damit konnte die Arbeitshypothese bestätigt werden, dass es bei polytransfundierten Thalassämiepatienten zu einer Eisenüberladung mit in der Folge entstehendem freiem Eisen kommt; bekannterweise induziert zweiwertiges Eisen die Fenton-Reaktion bzw. Haber-Weiss-Reaktion und damit oxidativen Stress. Bei Sichelzellanämiepatienten , die keine regelmäßigen Hochregimebluttransfusionen erhalten, die ebenso, wie in der Literatur beschrieben, oxidativem Stress ausgesetzt sind, müssen auch andere Pathomechanismen angenommen werden.
Das Ziel der vorliegenden Studie bestand darin, die klinische Bewährung von Kompositfüllungen (Klasse I und II) des Materials Herculite® XRV (Kerr, Karlsruhe, D) im Seitenzahnbereich an einem ausreichend großen Patientenkollektiv (n = 109) mit 176 Füllungen über einen Nachbeobachtungszeitraum von insgesamt 36 Monaten zu untersuchen. Die Füllungsqualitäten wurden in vivo, mittels klinischer Untersuchung, Abformung und intraoraler Fotografie, als auch nach Abformung in vitro, anhand von Replikamodellen nach bestimmten Parametern bewertet. Als klinisch durchgehend akzeptabel kann man die Auswertungen der Anatomischen Form, der Farbanpassung, der Oberfläche und der Oberflächenqualität bezeichnen. Der Gesamtnotendurchschnitt lag hier zwischen 1,35 und 2,18. Materialüberschüsse im Sinne einer positiven Stufe spielten primär in den mesialen und distalen Füllungsarealen eine Rolle. Mesial fand sich ein sprunghafter Anstieg von Note 4-Füllungen von 6,7% (6 Monate) auf 29,4% (36 Monate). Eine analoge Situation zeigte sich im distalen Bereich. Trotzdem lag hier ein klinisch guter Gesamtnotendurchschnitt von 2,11 nach 36 Monaten vor. Gute Gesamtbewertungen erhielten auch die klinischen Parameter des abrasionsbedingten Materialverlustes. Zwar zeigte sich nach 36-monatiger Liegedauer ein Anstieg von Füllungen, die mit der Note 4 bewertet werden mussten; z. B. okklusale Füllungsareale: Hier wiesen nach 18 Monaten nur 2,47% die Note 4 auf, nach 36 Monaten erhöhte sich dieser Prozentsatz auf 15,52%. Die Gesamtdurchschnittsnote (6, 18 und 36 Monate) war aber auch hier mit 1,55 durchaus klinisch akzeptabel. Nach 6 Monaten wurden unabhängig von der Lokalisation noch zwischen 43,3 – 45,9% aller Füllungen mit der Note 1 versehen, d. h. die Füllungsränder als sehr gut eingestuft. Im letzten Untersuchungsintervall (36 Monaten) war der Anteil von Füllungsrändern, die mit "sehr gut" bewertet wurden, zwischen 0,0 – 3,7% gesunken. Es zeigte sich hier eine signifikante Verschlechterung der Füllungsrandsituation, sie sich in der Gesamtnote von 2,53 nach drei Jahren widerspiegelt. Die Randverfärbung wies nach einer Liegedauer von 36 Monaten eine Gesamtnote von 1,71 auf. Auch hier ein Ergebnis, das durchaus klinisch akzeptabel ist. Klinisch inakzeptabel war die Beurteilung des approximalen Kontaktpunktes. Hier war während des gesamten Beobachtungszeitraumes, ein hoher Anteil an Note 4-Bewertungen für den mesialen (bis zu 54,4%) und distalen Kontaktpunkt (bis zu 46,2%) festzustellen. Insgesamt fielen die Beurteilungen des mesialen Kontaktpunktes schlechter aus als die des distalen. Die klinische Untersuchung der Gingiva zeigte bei allen Untersuchungsintervallen (6, 18 und 36 Monaten) gute Ergebnisse. Gingivale Verhältnisse, die mit Note 4 eingestuft werden mussten (starke Entzündungszeichen) fanden in größerer Häufigkeit nach 18-monatiger Liegedauer. Nach 36 Monaten wurde wieder ein Rückgang des Anteils der Note 4-Bewertungen festgestellt. Die Gesamtdurchschnittsnote beträgt 1,47. Die vorliegende Studie belegt die Anwendbarkeit des Kompositmaterials Herculite® XRV (Kerr, Karlsruhe, D) bei Klasse I- und II-Restaurationen im Seitenzahnbereich, dokumentiert aber auch die nach wie vor, noch vorhandenen Problembereiche wie z. B. approximaler Kontaktpunkt, Materialüberschuss. Werden alle Voraussetzungen zur Verarbeitung berücksichtigt, können Komposite im okklusionsgetragenen Bereich ihren Einsatz finden. Allerdings müssen verarbeitungstechnische Parameter wie: - Kavitätendesign, - exakte marginale Adaption, - Kofferdam, - korrekte Anwendung des adäquaten Schmelz-Dentin-Haftvermittlers, - korrekte Applikations- und Polymerisationstechnik, - hygienefähige Verhältnisse und - sehr gute Mundhygiene bzw. Motivation konsequent bei der zahnärztlichen Behandlung berücksichtigt werden. Wenn diese Parameter beim Legen von Kompositfüllungen ihren festen Platz gefunden haben, kann den wenigen, in dieser Studie gefundenen "Problembereichen", erfolgreich entgegengewirkt werden.
Background and purpose: Transient splenial oedema, also known as reversible splenial lesion syndrome (RESLES), is a rare magnetic resonance imaging (MRI) finding that presents as a round or ovoid focal oedema in the posterior corpus callosum, and is associated with a wide range of clinical conditions. The aetiology of RESLES is not fully clear. We aimed to investigate conflicting pathophysiological hypotheses by measuring local glucose metabolism in patients with RESLES.
Methods: We retrospectively analysed patients with RESLES after reductions in antiseizure medications during in-hospital video electroencephalography monitoring. We measured local glucose uptake using positron emission tomography/computed tomography and compared matched cohorts of patients with and without MRI evidence of RESLES using nonparametric tests.
Results: Local glucose metabolism in the splenium of seven patients with RESLES was not significantly different from the glucose metabolism of the seven patients in the matched cohort. This was true using both regular and normalized standardized glucose uptake value calculation methods (p = 0.902 and p = 0.535, respectively).
Conclusion: We found no evidence of local glucose hypometabolism in RESLES, which supports previous pathophysiological considerations that suggest that RESLES is an intercellular, intramyelinic oedema rather than a typical intracellular cytotoxic oedema, which is not reversible.
Hintergrund
In Anbetracht ihres bedeutenden Potenzials zur Verbesserung der medizinischen Versorgung wird Telemedizin weiterhin zu wenig genutzt. Trotz einiger erfolgreicher Pilotprojekte in den vergangenen Jahren ist insbesondere über die Hindernisse der Etablierung und Verstetigung von Telemedizin wenig bekannt. Diese Studie hatte das Ziel, die Einstellung niedergelassener Neurologen hinsichtlich der Nutzung von Telemedizin in der Epileptologie und resultierende Hinderungsgründe zu verstehen. Gleichzeitig werden mögliche Lösungsansätze präsentiert.
Methoden
Mithilfe eines individuell erstellten 14-Item-Fragebogens befragten wir prospektiv alle Neurologen, die zuvor die Teilnahme an einem transregionalen Telemedizinpilotprojekt im Bereich der Epileptologie abgelehnt oder keine Rückmeldung gegeben hatten, zu Gründen für und gegen den generellen Einsatz von bzw. die Teilnahme an Telemedizin.
Ergebnisse
Von 58 kontaktierten Neurologen antworteten 33 (57 %). Die häufigsten Gründe für die fehlende Nutzung der Telemedizin waren ein vermuteter Zeitmangel oder ein vermuteter zu großer organisatorischer Aufwand (49 %). Zudem wurden Bedenken bezüglich der technischen Ausstattung (30 %) und eine Präferenz für alternative Wege der intersektoralen Kommunikation (30 %) angegeben. Befürchtete Probleme in Bezug auf die Kostenerstattung für telemedizinische Leistungen waren für 27 % ein Hindernis. Neurologen in ländlichen Gebieten waren signifikant häufiger bereit, zunächst eine telemedizinische Konsultation anzufordern, bevor sie eine Überweisung ausstellen (p = 0,006).
Schlussfolgerungen
Die flächendeckende Etablierung von Telemedizinstrukturen ist immer noch durch Hindernisse erschwert, die meist im organisatorischen Bereich liegen. Die bestehenden Herausforderungen im Gesundheitswesen in ländlichen Gebieten sind eine besondere Chance für die Implementierung von Telemedizin. Die meisten Probleme der Telemedizin können gelöst werden, sollten aber bereits bei der Konzeptionierung von Projekten mitbedacht werden, um ihre Verstetigung zu erleichtern.
Recent data have suggested that performing recanalizing therapies in ischemic stroke might lead to an increased risk of acute symptomatic seizures. This applies to both intravenous thrombolysis and mechanical thrombectomy. We therefore determined the frequency of acute symptomatic seizures attributable to these two recanalization therapies using a large, population-based stroke registry in Central Europe. We performed two matched 1:1 case–control analyses. In both analyses, patients were matched for age, stroke severity on admission and pre-stroke functional status. The first analysis compared patients treated with intravenous thrombolysis to a non-recanalization control group. To isolate the effect of mechanical thrombectomy, we compared patients with both mechanical thrombectomy and intravenous thrombolysis to those with only intravenous thrombolysis treatment in a second analysis. From 135,117 patients in the database, 13,356 patients treated with only intravenous thrombolysis, and 1013 patients treated with both intravenous thrombolysis and mechanical thrombectomy were each matched to an equivalent number of controls. Patients with intravenous thrombolysis did not suffer from clinically apparent acute symptomatic seizures significantly more often than non-recanalized patients (treatment = 199; 1.5% vs. control = 237; 1.8%, p = 0.07). Mechanical thrombectomy in addition to intravenous thrombolysis also was not associated with an increased risk of acute symptomatic seizures, as the same number of patients suffered from seizures in the treatment and control group (both n = 17; 1.7%, p = 1). In a large population-based stroke registry, the frequency of clinically apparent acute symptomatic seizures was not increased in patients who received either intravenous thrombolysis alone or in conjunction with mechanical thrombectomy.
The National Institutes of Health Stroke Scale (NIHSS) score is the most frequently used score worldwide for assessing the clinical severity of a stroke. Prior research suggested an association between acute symptomatic seizures after stroke and poorer outcome. We determined the frequency of acute seizures after ischemic stroke in a large population-based registry in a central European region between 2004 and 2016 and identified risk factors for acute seizures in univariate and multivariate analyses. Additionally, we determined the influence of seizures on morbidity and mortality in a matched case–control design. Our analysis of 135,117 cases demonstrated a seizure frequency of 1.3%. Seizure risk was 0.6% with an NIHSS score at admission <3 points and increased up to 7.0% with >31 score points. Seizure risk was significantly higher in the presence of acute non-neurological infections (odds ratio: 3.4; 95% confidence interval: 2.8–4.1). A lower premorbid functional level also significantly increased seizure risk (OR: 1.7; 95%CI: 1.4–2.0). Mortality in patients with acute symptomatic seizures was almost doubled when compared to controls matched for age, gender, and stroke severity. Acute symptomatic seizures increase morbidity and mortality in ischemic stroke. Their odds increase with a higher NIHSS score at admission.
Background: Tuberous sclerosis complex (TSC) is a monogenetic, multisystem disorder characterized by benign growths due to TSC1 or TSC2 mutations. This German multicenter study estimated the costs and related cost drivers associated with organ manifestations in adults with TSC.
Methods: A validated, three-month, retrospective questionnaire assessed the sociodemographic and clinical characteristics, organ manifestations, direct, indirect, out-of-pocket (OOP), and nursing care-level costs among adult individuals with TSC throughout Germany from a societal perspective (costing year: 2019).
Results: We enrolled 192 adults with TSC (mean age: 33.4 ± 12.7 years; range: 18–78 years, 51.6% [n = 99] women). Reported TSC disease manifestations included skin (94.8%) and kidney and urinary tract (74%) disorders, epilepsy (72.9%), structural brain defects (67.2%), psychiatric disorders (50.5%), heart and circulatory system disorders (50.5%), and lymphangioleiomyomatosis (11.5%). TSC1 and TSC2 mutations were reported in 16.7% and 25% of respondents, respectively. Mean direct health care costs totaled EUR 6452 (median EUR 1920; 95% confidence interval [CI] EUR 5533–7422) per patient over three months. Medication costs represented the major direct cost category (77% of total direct costs; mean EUR 4953), and mechanistic target of rapamycin (mTOR) inhibitors represented the largest share (68%, EUR 4358). Mean antiseizure drug (ASD) costs were only EUR 415 (6%). Inpatient costs (8%, EUR 518) and outpatient treatment costs (7%; EUR 467) were important further direct cost components. The mean care grade allowance as an approximator of informal nursing care costs was EUR 929 (median EUR 0; 95% CI EUR 780–1083) over three months. Mean indirect costs totaled EUR 3174 (median EUR 0; 95% CI EUR 2503–3840) among working-age individuals (< 67 years in Germany). Multiple regression analyses revealed mTOR inhibitor use and persistent seizures as independent cost-driving factors for total direct costs. Older age and disability were independent cost-driving factors for total indirect costs, whereas epilepsy, psychiatric disease, and disability were independent cost-driving factors for nursing care costs.
Conclusions: This three-month study revealed substantial direct healthcare, indirect healthcare, and medication costs associated with TSC in Germany. This study highlights the spectrum of organ manifestations and their associated treatment needs in the German healthcare setting. Trial registration: DRKS, DRKS00016045. Registered 01 March 2019, http://www.drks.de/DRKS00016045.
A systematic review on the burden of illness in individuals with tuberous sclerosis complex (TSC)
(2020)
Objective: This review will summarize current knowledge on the burden of illness (BOI) in tuberous sclerosis complex (TSC), a multisystem genetic disorder manifesting with hamartomas throughout the body, including mainly the kidneys, brain, skin, eyes, heart, and lungs.
Methods: We performed a systematic analysis of the available literature on BOI in TSC according to the PRISMA guidelines. All studies irrespective of participant age that reported on individual and societal measures of disease burden (e.g. health care resource use, costs, quality of life) were included.
Results: We identified 33 studies reporting BOI in TSC patients. Most studies (21) reported health care resource use, while 14 studies reported quality of life and 10 studies mentioned costs associated with TSC. Only eight research papers reported caregiver BOI. Substantial BOI occurs from most manifestations of the disorder, particularly from pharmacoresistant epilepsy, neuropsychiatric, renal and skin manifestations. While less frequent, pulmonary complications also lead to a high individual BOI. The range for the mean annual direct costs varied widely between 424 and 98,008 International Dollar purchasing power parities (PPP-$). Brain surgery, end-stage renal disease with dialysis, and pulmonary complications all incur particularly high costs. There is a dearth of information regarding indirect costs in TSC. Mortality overall is increased compared to general population; and most TSC related deaths occur as a result of complications from seizures as well as renal complications. Long term studies report mortality between 4.8 and 8.3% for a follow-up of 8 to 17.4 years.
Conclusions: TSC patients and their caregivers have a high burden of illness, and TSC patients incur high costs in health care systems. At the same time, the provision of inadequate treatment that does not adhere to published guidelines is common and centralized TSC care is received by no more than half of individuals who need it, especially adults. Further studies focusing on the cost effectiveness and BOI outcomes of coordinated TSC care as well as of new treatment options such as mTOR inhibitors are necessary.
Stress-induced cell surface expression of MHC class I-related glycoproteins of the MIC and ULBP families allows for immune recognition of dangerous “self cells” by human cytotoxic lymphocytes via the NKG2D receptor. With two MIC molecules (MICA and MICB) and six ULBP molecules (ULBP1–6), there are a total of eight human NKG2D ligands (NKG2DL). Since the discovery of the NKG2D–NKG2DL system, the cause for both redundancy and diversity of NKG2DL has been a major and ongoing matter of debate. NKG2DL diversity has been attributed, among others, to the selective pressure by viral immunoevasins, to diverse regulation of expression, to differential tissue expression as well as to variations in receptor interactions. Here, we critically review the current state of knowledge on the poorly studied human NKG2DL ULBP4. Summarizing available facts and previous studies, we picture ULBP4 as a peculiar ULBP family member distinct from other ULBP family members by various aspects. In addition, we provide novel experimental evidence suggesting that cellular processing gives rise to mature ULBP4 glycoproteins different to previous reports. Finally, we report on the proteolytic release of soluble ULBP4 and discuss these results in the light of known mechanisms for generation of soluble NKG2DL.
Background: The treatment of different skin conditions with spa waters is a long tradition dating back to at least late Hellenism. Interestingly, independent scientific examinations studying the effect of spa waters are scarce.
Objective: In the present in vitro study, we compared the effect of culture media supplemented with (a) thermal spa waters (La Roche-Posay, Avène) and (b) two natural mineral drinking waters (Heppinger, Adelholzener) on physiological parameters in HaCaT keratinocytes.
Methods: The different medium preparations were investigated with regard to cell proliferation and cell damage. Moreover, the impact on inflammation parameters with and without ultraviolet B (UVB) irradiation was examined.
Results: Two popular thermal spring waters were found to suppress cell proliferation and cell damage. Moreover, these waters reversed the induction of interleukin-6, as measured using enzyme-linked immunosorbent assay and promoter transactivation, and the formation of reactive oxygen species after UVB stimulation. Of note, the two natural mineral waters, which are distributed as drinking waters, had some effect on the above-mentioned parameters but to a lesser extent.
Conclusion: In summary, our results show that spa waters, and particularly those derived from thermal springs, reduce parameters associated with inflammation. It seems likely that trace elements such as selenium and zinc are critical for the observed effects.
hallmark of ageing is the redistribution of body fat. Particularly, subcutaneous fat decreases paralleled by a decrease of skin collagen I are typical for age-related skin atrophy. In this paper, we hypothesize that collagen I may be a relevant molecule stimulating the differentiation of adipose-derived stem cells (ASCs) into adipocytes augmenting subcutaneous fat. In this context lipogenesis, adiponectin, and collagen I receptor expression were determined. Freshly isolated ASCs were characterized by stemness-associated surface markers by FACS analysis and then transdifferentiated into adipocytes by specific medium supplements. Lipogenesis was evaluated using Nile Red staining and documented by fluorescence microscopy or quantitatively measured by using a multiwell spectrofluorometer. Expression of adiponectin was measured by real-time RT-PCR and in cell-free supernatants by ELISA, and expression of collagen I receptors was observed by western blot analysis. It was found that supports coated with collagen I promote cell adhesion and lipogenesis of ASCs. Interestingly, a reverse correlation to adiponectin expression was observed. Moreover, we found upregulation of the collagen receptor, discoidin domain-containing receptor 2; receptors of the integrin family were absent or downregulated. These findings indicate that collagen I is able to modulate lipogenesis and adiponectin expression and therefore may contribute to metabolic dysfunctions associated with ageing.
Eine Autoimmunreaktion impliziert Verlust der Autotoleranz und ermöglicht Immunreaktionen gegen körpereigene Antigene. Bei autoimmuner Erkrankung der Schilddrüse Typ M. Basedow führt die Aktivierung von T-Lymphozyten zur vorübergehenden und sequentiellen Expression von spezifischen Molekülen auf der Zelloberfläche, z.B. CD25 oder HLA-DR. Dass die CD4+CD25+-, CD8+CD25+-Zellen sowie HLA-DR-positive T-Zellen eine wesentliche Rolle in der Autoimmunität der Schilddrüse haben, ist erwiesen. Dennoch sind die genauen pathophysiologischen Mechanismen ungeklärt. Zusätzlich haben mehrere Studien eine Erhöhung der B-Zellen, insbesondere die Erhöhung der Anzahl von CD19+CD25+-Zellen bei Ophtalmopathie, sowie eine Erhöhung der zytotoxischen Aktivität der NK-Zellen beschrieben. Ziel der vorliegenden Arbeit war es, mit Hilfe der Durchflusszytometrie die Veränderungen in der Expression von Aktivierungsmarkern CD25, HLA-DR und CD94 auf peripheren und intrathyreoidalen Lymphozytensubpopulationen bei M. Basedow und Struma zu bestimmen. Im ersten Teil der Arbeit wurden periphere Lymphozytensubpopulationen von M. Basedow, Struma, und Kontrollgruppe untereinander verglichen. Die Analyse von peripheren T-Helferzellen CD3+CD4+CD25- zeigte sowohl bei M. Basedow- als auch bei Struma-Patienten eine signifikant niedrigere Anzahl im Vergleich zur Kontrolle, während die peripheren CD3+CD4+CD25+-Zellen signifikant höhere Werte gegenüber der Kontrollgruppe aufwiesen. Im Rahmen der Untersuchung traten die peripheren aktivierten B-Zellen (CD45+CD19+CD25+) sowie peripheren NK-Zellen (CD45+CD56+CD94-, CD45+CD56+CD94+, CD45+CD8-CD56+, CD45+CD3-CD56+ und NK-T-Zellen (CD45+CD8+CD56+, CD45+CD3+CD56+) bei Struma in eine signifikant erhöhten Anzahl im Vergleich zur Kontrolle auf. Die nicht aktivierten B-Zellen (CD45+CD19+CD25-) zeigten bei Patienten mit M. Basedow eine signifikante Erhöhung der Anzahl verglichen mit der Strumagruppe. Diese Ergebnisse zeigen deutliche Unterschiede in den Aktivierungsmustern von M. Basedow und Struma gegenüber der Kontrolle. Somit kann man bei beiden Erkrankungen über eine immunologische Reaktion in der Peripherie sprechen, die sich deutlich von der bei gesunden unterscheidet. Dennoch war in der Peripherie bei M. Basedow-Patienten die Aktivierung von B-Zellen, wahrscheinlich autoimmun bedingt, beeinträchtigt. Im zweiten Teil der Arbeit wurden intrathyreoidale Lymphozytensubpopulationen von M. Basedow- und Struma-Patienten untereinander verglichen. Die Anzahl der intrathyreoidalen CD3+CD4+CD25--Zellen von M. Basedow war signifikant höher im Vergleich zu Struma, andererseits waren die Werte der CD45+CD19+CD25+-Zellen signifikant niedriger. Zusätzlich wurde bei M. Basedow-Patienten eine Analyse der Verhältnisse zwischen aktivierten und nicht aktivierten intrathyreoidalen Lymphozytensubpopulationen durchgeführt. Der Anteil nicht aktivierter T-Helferzellen (CD4+CD25-), zytotoxischer Zellen (CD8+CD25-) und B-Zellen (CD19+CD25-) war höher als der Anteil aktivierter T-Helferzellen (CD4+CD25+), zytotoxischen Zellen (CD8+CD25+) und B-Zellen (CD19+CD25+). Die hier vorgestellten Ergebnisse legen nahe, dass die Fähigkeit der CD4+CD25+-Zellen, die Proliferation von CD4+CD25--Zellen zu unterdrücken, bei M. Basedow-Patienten beeinträchtig ist. Dies führt bei diesen Patienten zu einer Zunahme der CD4+CD25--Subpopulation. Die Änderung der Verhältnisse von intrathyreoidalen aktivierten zu nicht aktivierten T-Helferzellen scheint hierbei mit der Entwicklung von M. Basedow assoziiert zu sein. Im dritten Teil der Arbeit wurden periphere und intrathyreoidale Lymphozyten von M. Basedow gegenübergestellt. Die Anzahl von intrathyreoidalen aktivierten zytotoxischen Zellen von M. Basedow mit dem Phänotyp CD3+CD8+CD25+ war erhöht im Vergleich zur Peripherie. Derselbe Vergleich wurde auch bei Struma durchgeführt. Dabei zeigten die intrathyreoidalen CD3+CD4+HLA-DR+- CD3+CD4+CD25+- CD3+CD8+CD25+- und CD3+CD8+HLA-DR+-Zellen sowie CD45+CD56+CD94--NK-Zellen höhere Werte als Periphere. Somit konnten wir zeigen, dass bei M. Basedow die Aktivierung von CD3+CD4+HLA-DR+- CD3+CD4+CD25+- und CD3+CD8+HLA-DR+-Zellen in der Schilddrüse unterdrückt ist. Dies könnte als Unterscheidungsmerkmal zwischen M. Basedow und Struma wichtig sein. Im vierten Teil der Arbeit wurden die peripheren und intrathyreoidalen Lymphozyten nach der Kultivierung mit Thyreozyten verglichen. Die Kultivierung von peripheren CD3+CD4+HLA-DR--Zellen mit Thyreozyten von Patienten mit M. Basedow bzw. Struma zeigte eine Vermehrung dieser Zellen im Vergleich zur Kultivierung ohne Thyreozyten. Die Struma-Patienten zeigten jedoch bei Kultivierung mit Thyreozyten höhere Anzahlen von intrathyreoidalen aktivierten T-Helferzellen (CD3+CD4+HLA-DR+) und zytotoxischen Zellen (CD3+CD8+HLA-DR+), als kultiviert ohne Thyreozyten. Aufgrund der Ergebnisse in diesem Teil der Arbeit kann angenommen werden, dass ein hemmender Einfluss von Thyreozyten auf intrathyreoidalen CD3+CD4+HLA-DR+- und CD3+CD8+HLA-DR+ -Zellen bei M. Basedow vorhanden ist.
Zur adäquaten Bestrahlung maligner Tumoren ist eine gute Reproduzierbarkeit der angestrebten Bestrahlungsposition bei jeder Therapiefraktion von entscheidender Bedeutung. Bei der freien Lagerung von Patienten muß die Bestrahlungsposition anhand von Hautmarkierungen sicher nachvollziehbar sein. Häufiges Nachzeichnen schränkt die Identifizierbarkeit dieser Einstellhilfen durch ein zunehmendes Maß an Ungenauigkeit ein. Im ersten Teil der Studie wurden drei verschiedene Markierungsverfahren in bezug auf ihre Eignung in der Bestrahlungsroutine verglichen. Es handelte sich um zwei Verfahren zur Konservierung der Haumarkierungen mit Hilfe von Wundverbänden und um die Hautmarkierung mit einem speziellen Hautmarkierungsstift. Zur Bewertung dienten die Kriterien Haltbarkeitsdauer und Identifizierbarkeit, sowie Hautverträglichkeit. Es zeigte sich, daß ausschließlich der Viomedex ® Hautmarkierungsstift für den Einsatz bei der Bestrahlung geeignet war. Im zweiten Teil der Studie wurde prospektiv untersucht, ob verglichen mit der bisher geübten Praxis mit Viomedex ® eine Verlängerung der Haltbarkeit der Hautmarkierungen und eine Verbesserung der Reproduzierbarkeit der Patientenlagerung erreicht werden kann. Haltbarkeit und Reproduzierbarkeit wurden in Abhängigkeit von den Hautmerkmalen Nachtschweiß, Schweißneigung, Behaarungsgrad und Hauttyp sowie dem Zeitpunkt der Einzeichnung ermittelt. Die durchschnittliche Haltbarkeit, betrug 11,02 Tage. Sie stand in keinem signifikanten Zusammenhang zu bestimmten Hautparametern. Einzeichnungen, die zu einem späteren Zeitpunkt im Verlauf der Strahlenbehandlung erfolgten, wiesen eine etwas längere Haltbarkeit auf, der Unterschied war statistisch nicht signifikant. Durch Identifizierung anatomischer Bildpunkte wurden die Verifikationsaufnahmen mit der jeweiligen Simulationsaufnahme verglichen und die mittlere Gesamtabweichung aller untersuchten Einstellungen als Maß für die Reproduzierbarkeit der Bestrahlung berechnet. Ein signifikanter Zusammenhang mit dem Zeitpunkt der Einzeichnung oder mit bestimmten Hautparametern trat nicht auf. Gegenüber früheren Untersuchungen unseres Institutes ergab sich eine stark verbesserte Reproduzierbarkeit. So verringerte sich der Wert der Gesamtabweichung bei der Bestrahlung der weiblichen Brust von 0,605 cm auf 0,490 cm. Bei Betrachtung der übrigen Patienten, die ohne Fixationshilfen bestrahlt wurden, konnte die Gesamtabweichung von 1,082 cm auf 0,655 cm gesenkt werden. Auch der Prozentsatz sehr großer Einstellfehler (>1 cm) ist im internen Vergleich bei der Bestrahlung aller Körperregionen von 47,7 % auf 20,4 % zurückgegangen. Es wurde gezeigt, daß durch langhaftende, sorgfältig eingezeichnete Hautmarkierungen, die Reproduzierbarkeit der Einstellungen bei frei gelagerten Patienten verbessert werden kann. Eine ProblemPatientengruppe, die aufgrund ihrer Hauteigenschaften einer gesonderten Markierungsmethode bedarf, wurde nicht ermittelt. Es konnten feste Regeln zum Anbringen und Überwachen der Hautmarkierungen formuliert werden, die in die Bestrahlungsroutine der Klinik für Strahlentherapie der J. W. GoetheUniversität aufgenommen wurden.
Proton pumping respiratory complex I (NADH:ubiquinone oxidoreductase) is a major component of the oxidative phosphorylation system in mitochondria and many bacteria. In mammalian cells it provides 40% of the proton motive force needed to make ATP. Defects in this giant and most complicated membrane-bound enzyme cause numerous human disorders. Yet the mechanism of complex I is still elusive. A group exhibiting redox-linked protonation that is associated with iron-sulfur cluster N2 of complex I has been proposed to act as a central component of the proton pumping machinery. Here we show that a histidine in the 49-kDa subunit that resides near iron-sulfur cluster N2 confers this redox-Bohr effect. Mutating this residue to methionine in complex I from Yarrowia lipolytica resulted in a marked shift of the redox midpoint potential of iron-sulfur cluster N2 to the negative and abolished the redox-Bohr effect. However, the mutation did not significantly affect the catalytic activity of complex I and protons were pumped with an unchanged stoichiometry of 4 H+/2e−. This finding has significant implications on the discussion about possible proton pumping mechanism for complex I.
Highlights
• Artificial intelligence systems for mechanically ventilated patients are increasing.
• The clinical and financial impact of these models are often unexamined.
• We developed a generic health-economic model for artificial intelligence systems.
• This model assesses the cost-effectiveness for many different scenarios.
• The developed framework is easily adjustable to other (clinical) situations.
Abstract
Purpose: The health and economic consequences of artificial intelligence (AI) systems for mechanically ventilated intensive care unit patients often remain unstudied. Early health technology assessments (HTA) can examine the potential impact of AI systems by using available data and simulations. Therefore, we developed a generic health-economic model suitable for early HTA of AI systems for mechanically ventilated patients.
Materials and methods: Our generic health-economic model simulates mechanically ventilated patients from their hospitalisation until their death. The model simulates two scenarios, care as usual and care with the AI system, and compares these scenarios to estimate their cost-effectiveness.
Results: The generic health-economic model we developed is suitable for estimating the cost-effectiveness of various AI systems. By varying input parameters and assumptions, the model can examine the cost-effectiveness of AI systems across a wide range of different clinical settings.
Conclusions: Using the proposed generic health-economic model, investors and innovators can easily assess whether implementing a certain AI system is likely to be cost-effective before an exact clinical impact is determined. The results of the early HTA can aid investors and innovators in deployment of AI systems by supporting development decisions, informing value-based pricing, clinical trial design, and selection of target patient groups.
Background: Berotralstat (BCX7353) is an oral, once-daily inhibitor of plasma kallikrein in development for the prophylaxis of hereditary angioedema (HAE) attacks.
Objective: Our aim was to determine the efficacy, safety, and tolerability of berotralstat in patients with HAE over a 24-week treatment period (the phase 3 APeX-2 trial).
Methods: APeX-2 was a double-blind, parallel-group study that randomized patients at 40 sites in 11 countries 1:1:1 to receive once-daily berotralstat in a dose of 110 mg or 150 mg or placebo (Clinicaltrials.gov identifier NCT03485911). Patients aged 12 years or older with HAE due to C1 inhibitor deficiency and at least 2 investigator-confirmed HAE attacks in the first 56 days of a prospective run-in period were eligible. The primary efficacy end point was the rate of investigator-confirmed HAE attacks during the 24-week treatment period.
Results: A total of 121 patients were randomized; 120 of them received at least 1 dose of the study drug (n = 41, 40, and 39 in the 110-mg dose of berotralstat, 150-mg of dose berotralstat, and placebo groups, respectively). Berotralstat demonstrated a significant reduction in attack rate at both 110 mg (1.65 attacks per month; P = .024) and 150 mg (1.31 attacks per month; P < .001) relative to placebo (2.35 attacks per month). The most frequent treatment-emergent adverse events that occurred more with berotralstat than with placebo were abdominal pain, vomiting, diarrhea, and back pain. No drug-related serious treatment-emergent adverse events occurred.
Conclusion: Both the 110-mg and 150-mg doses of berotralstat reduced HAE attack rates compared with placebo and were safe and generally well tolerated. The most favorable benefit-to-risk profile was observed at a dose of 150 mg per day.
Die Bestimmung von Procalcitonin im Serum stellt einen wesentlichen Bestandteil der Diagnostik, Verlaufskontrolle und Therapieüberwachung septischer Infektionen dar. Das Procalcitonin ist ein Marker, der in der Diagnostik von Infektionen, schweren Entzündungen und Sepsis wertvolle und therapieentscheidende Aussagen ermöglicht. Er sollte allerdings nicht zum Screening asymptomatischer Personen im Rahmen arbeitsmedizinischer Vorsorgen oder sog. Manager-Untersuchungen genutzt werden, sondern lediglich beim klinischen Verdacht einer vorliegenden systemischen Infektion bei entsprechenden Symptomen.
Die Bestimmung von ACE im Serum oder Heparinplasma stellt einen wesentlichen Bestandteil der Diagnostik, Verlaufskontrolle und Therapieüberwachung von benignen Lungenerkrankungen dar. ACE ist ein Marker, der bei Sarkoidose wertvolle Aussagen zur Diagnosefindung ermöglicht. Hier zeichnet er sich durch hohe Sensitivität und Spezifität aus.
From a global viewpoint, a lot of time is spent within the indoor air compartment of vehicles. A German study on mobility has revealed that, on average, people spend 45 minutes per day inside vehicles. In recent years the number of cars has increased to around 43 million vehicles in private households. This means that more than one car can be used in every household. The ratio has been growing, especially in eastern Germany and rural areas. "Overall and especially outside the cities, the car remains by far number one mode of transport, especially in terms of mileage". Therefore, numerous international studies have addressed different aspects of indoor air hygiene, in the past years. In this paper, meaningful original studies on car indoor air pollution, related to VOCs, COx, PMs, microbials, BFRs, OPFRs, cigarettes, electronic smoking devices, high molecular weight plasticizer, and NOx are summarized in the form of a review. This present review aimed to summarize recently published studies in this important field of environmental medicine and points to the need for further studies with special recommendations for optimizing the interior air hygiene.
Aim: Comparison of the clinical efficacy (digitally volumetric, aesthetic, patient-centred outcomes) of tunnel technique (TUN) with subepithelial connective tissue graft (CTG) versus coronally advanced flap (CAF) with enamel matrix derivate (EMD) 5 years after gingival recession therapy. Materials and methods: In 18 patients contributing 36 RT1 recessions, study models were collected at baseline and follow-ups. Optical scans assessed recessions computer-assisted [recession depth, recession reduction (RECred), complete root coverage (CRC), percentage of root coverage (RC), pointwise (pTHK) and mean areal (aTHK) marginal soft tissue thickness]. Root coverage aesthetic Score (RES) was used for aesthetic evaluation and visual analogue scales for patient-centred data collection applied. Results: Sixty months after surgery, 50.0% (TUN+CTG) and 0.0% (CAF+EMD) of sites showed CRC (p = 0.0118), 82.2% (TUN+CTG) and 32.0% (CAF+EMD) achieved RC, respectively (p = 0.0023). CTG achieved significantly better RECred (TUN+CTG: 1.75±0.74 mm; CAF+EMD: 0.50 ± 0.39 mm; p = 0.0009) and aTHK (TUN+CTG: 0.95 ± 0.41 mm; CAF+EMD: 0.26 ± 0.28 mm; p = 0.0013). RES showed superior outcomes (p = 0.0533) for TUN+CTG (6.86 ± 2.31) compared to CAF+EMD (4.63 ± 1.99). The study failed to find significant differences related to patient-centred outcomes (TUN+CTG: 8.30 ± 2.21; CAF+EMD: 7.50 ± 1.51; p = 0.1136). Conclusions: Five years after treatment, CTG resulted in better clinical and aesthetic outcomes than CAF+EMD. Increased THK was associated with improved outcomes for RECred and RC.
Nierensteine sind eine häufige Diagnose, welche Patient und Gesundheitssystem gleichermaßen belasten. In dieser Arbeit sollten deshalb bekannte präoperative und intraoperative Faktoren bestätigt und neue identifiziert werden, welche das Ergebnis bei der endourologischen Steintherapie durch rigide oder flexible Ureterorenoskopie vorhersagen können. Die untersuchten Outcome-Variablen waren die Steinfreiheit, die postoperative Schmerzfreiheit, sowie die ökonomischen Faktoren OP-Zeit und Verweildauer. Ist eine Prädiktion dieser Variablen möglich, so wird der Krankenhausaufenthalt für Patient und Kliniken besser planbar, zudem kann anhand der ökonomischen Faktoren abgeschätzt werden, wie rentabel die Behandlung sein wird. Zu diesem Zweck sollten aus den Prüfvariablen Scores erstellt werden, welche die Steinfreiheit möglichst zuverlässig vorhersagen und bei gleicher Prädiktionskraft einfacher anzuwenden sind als der bekannte S.T.O.N.E. Score zur Abschätzung der Steinfreiheit nach starrer und flexibler URS. Zudem sollten erstmals auch Outcome-Scores für die OP-Zeit, die Verweildauer und die postoperative Schmerzfreiheit erstellt werden.
Hierfür wurden zunächst Patientendaten, sowie radiologische und intraoperative Ergebnisse zusammengetragen und mittels statistischer univariater Analyse auf einen Zusammenhang mit den Outcome-Faktoren überprüft. Hierbei wurden die starre und die flexible URS getrennt analysiert. Im nächsten Schritt wurden in multivariater Analyse die unabhängigen Faktoren identifiziert, welche das Outcome beeinflussen. Aus diesen Variablen wurden schließlich Scores errechnet und deren Prädiktionskraft im Hinblick auf das klinische und ökonomische Outcome nach URS mittels ROC-Analyse untersucht und verglichen. Für die Vorhersage der Steinfreiheit konnte zu jedem Eingriff ein Score erstellt werden, der bei gleicher oder besserer Prädiktionskraft mit weniger Variablen auskommt, als der bisher bekannteste publizierte S.T.O.N.E. Score und somit leichter anzuwenden ist. Der Renewal-Score für die starre URS umfasst die Parameter Steinlänge, Steinlokalisation, Steinanzahl und initiale Notfallvorstellung der Patienten, der Flexfree-Score für die flexible URS beinhaltet hingegen die Steinlänge, eine präinterventionelle DJ-Kathetereinlage und die Erfahrung des Urologen. Auch für die ökonomischen Parameter Operations- und Verweildauer konnten erstmals spezifische Outcome-Scores erstellt werden, lediglich die Schmerzfreiheit ließ sich mit den gesammelten Daten nicht vorhersagen. Bei der flexiblen URS konnte der zur gemeinsamen Prädiktion von OP- und Verweildauer geeignete Fleconomy-Score aus den Variablen Steinbreite und Steinvorgeschichte errechnet werden. Bei der starren URS mussten getrennte Scores erstellt werden. Für die OP-Dauer wurde der Ritime-Score aus den Parametern Steinlänge, Steinbreite, Steinlokalisation und Notfallvorstellung errechnet. Auch der Renewal-Score zur Vorhersage der Steinfreiheit nach rigider URS eignete sich zur Prädiktion der Operationszeit. Der Ristay-Score zur Vorhersage der Verweildauer nach starrer URS umfasst hingegen die Faktoren präoperative DJ-Kathetereinlage, den präinterventionellen Kreatininwert und die OP-Zeit. Auch die ökonomischen Tests sind klinisch einfach zu bestimmen und kommen bei hoher Vorhersagegüte mit wenigen Variablen aus. Alle erstellten Scores sind praxistauglich und stellen eine Weiterentwicklung der bisher zur Verfügung stehenden Tools oder komplette Neuerungen zur Vorhersage des Outcomes nach endourologischer Steintherapie dar. Dies ist nicht nur für den Patienten von Bedeutung, sondern hilft auch den Kliniken OP- und Verweiltage besser zu planen und somit den Behandlungsertrag zu kalkulieren.
GTP cyclohydrolase (GCH1) governs de novo synthesis of the enzyme cofactor, tetrahydrobiopterin (BH4), which is essential for biogenic amine production, bioactive lipid metabolism and redox coupling of nitric oxide synthases. Overproduction of BH4 via upregulation of GCH1 in sensory neurons is associated with nociceptive hypersensitivity in rodents, and neuron‐specific GCH1 deletion normalizes nociception. The translational relevance is revealed by protective polymorphisms of GCH1 in humans, which are associated with a reduced chronic pain. Because myeloid cells constitute a major non‐neuronal source of BH4 that may contribute to BH4‐dependent phenotypes, we studied here the contribution of myeloid‐derived BH4 to pain and itch in lysozyme M Cre‐mediated GCH1 knockout (LysM‐GCH1−/−) and overexpressing mice (LysM‐GCH1‐HA). Unexpectedly, knockout or overexpression in myeloid cells had no effect on nociceptive behaviour, but LysM‐driven GCH1 knockout reduced, and its overexpression increased the scratching response in Compound 48/80 and hydroxychloroquine‐evoked itch models, which involve histamine and non‐histamine dependent signalling pathways. Mechanistically, GCH1 overexpression increased BH4, nitric oxide and hydrogen peroxide, and these changes were associated with increased release of histamine and serotonin and degranulation of mast cells. LysM‐driven GCH1 knockout had opposite effects, and pharmacologic inhibition of GCH1 provided even stronger itch suppression. Inversely, intradermal BH4 provoked scratching behaviour in vivo and BH4 evoked an influx of calcium in sensory neurons. Together, these loss‐ and gain‐of‐function experiments suggest that itch in mice is contributed by BH4 release plus BH4‐driven mediator release from myeloid immune cells, which leads to activation of itch‐responsive sensory neurons.
Alzheimer’s disease (AD) is the most common form of dementia in the elderly; important risk factors are old age and inheritance of the apolipoprotein E4 (APOE4) allele. Changes in amyloid precursor protein (APP) binding, trafficking, and sorting may be important AD causative factors. Secretase-mediated APP cleavage produces neurotoxic amyloid-beta (Aβ) peptides, which form lethal deposits in the brain. In vivo and in vitro studies have implicated sortilin-related receptor (SORL1) as an important factor in APP trafficking and processing. Recent in vitro evidence has associated the APOE4 allele and alterations in the SORL1 pathway with AD development and progression. Here, we analyzed SORL1 expression in neural stem cells (NSCs) from AD patients carrying null, one, or two copies of the APOE4 allele. We show reduced SORL1 expression only in NSCs of a patient carrying two copies of APOE4 allele with increased Aβ/SORL1 localization along the degenerated neurites. Interestingly, SORL1 binding to APP was largely compromised; this could be almost completely reversed by γ-secretase (but not β-secretase) inhibitor treatment. These findings may yield new insights into the complex interplay of SORL1 and AD pathology and point to NSCs as a valuable tool to address unsolved AD-related questions in vitro.
T-Zellen spielen bei der Immunüberwachung der peripheren Organe wie der Haut eine zentrale Rolle. Sie wandern als naive T-Zellen kontinuierlich in großer Zahl in den Paracortex der peripheren Lymphknoten ein. Die Lymphknoten dienen der Konzentration von antigenem Material, das in der Periphere von professionellen Antigen-präsentierenden Zellen aufgenommen und in die Lymphknoten transportiert wird. Dort treten die Antigen-präsentierenden Zellen in engen, physischen Kontakt mit naiven, Antigen-spezifischen T-Zellen und aktivieren diese. Neben der Aktivierung in diesem definierten anatomischen Kontext kommt es auch zur Aufregulation eines Codes spezifischer Adhäsionsmoleküle, die die Invasion in dasjenige Organ zur Folge hat, aus dem das Antigen drainiert wurde. Dieses organspezifische Rezirkulationsverhalten wird „Homing“ genannt und hat eine optimierte Antigenabwehr zur Folge, da unterschiedliche Antigene typischer Weise mit unterschiedlicher Frequenz in verschiedenen Organen anzutreffen sind. .... Ziel des ersten Teils der Arbeit war es somit, Auslöser der genannten entzündlichen Dermatosen molekular zu charakterisieren. Ausgehend von der klinischen Beobachtung, daß bakterielle Infektionen bzw. Besiedelung mit Gram-positiven Erregern diesen Erkrankungen vorangehen, wollten wir die Bedeutung von bakteriellen Superantigenen näher untersuchen, da diese Substanzen aufgrund ihrer starken, T-Zell stimulierenden Eigenschaften als Kandidatenmoleküle für die Induktion von T-Zell mediierten Dermatosen in Frage kamen. Dazu etablierten wir für die Psoriasis vulgaris ein xenogenes Transplantationsmodell. Bei diesem wurde humane Haut von gesunden Kontrollen oder periläsionale Haut von Patienten mit Psoriasis vulgaris auf immundefiziente SCID-Mäuse transplantiert. Die repetitive Injektion eines bakteriellen Superantigens induzierte ausschließlich bei Psoriatikern, nicht jedoch bei gesunden Kontrollen, einen psoriatischen Phänotyp. Diese Ergebnisse lassen zwei Schlüsse zu: (I) Ein bakterielles Superantigen ist unter bestimmten Voraussetzungen ausreichend, um eine Psoriasis zu induzieren. (II) Ein bestimmtes, evt. genetisch determiniertes Mikromilieu der Haut ist Voraussetzung für die Induktion der Psoriasis durch das Superantigen. ... Im zweiten Teil der Arbeit gingen wir der Frage nach, inwiefern Veränderungen des Hautimmunsystems nachweisbar sind, die auf bakterielle Superantigene zurückzuführen sind. In unseren Untersuchungen setzten wir dabei zwei Schwerpunkte: (I) Das T-Zell Rezeptor (TCR) Vbeta Repertoire, da Superantigene alpha/beta+ T-Zellen in TCR Vbeta spezifischer Weise aktivieren und (II) Adhäsionsmoleküle unter besonderer Berücksichtigung des Haut-spezifischen Adhäsionsmoleküls CLA, da T-Zell Adhäsionsmoleküle aktivierungsabhängig reguliert werden und eine veränderte T-Zell Migration in pathophysiologische Vorgänge involviert ist. Die Untersuchungen des TCR Vbeta Repertoires der Haut erfolgten an der Psoriasis vulgaris als Modell einer T-Zell vermittelten Immundermatose, die – wie oben gezeigt – u.a. durch bakterielle Superantigene induziert werden kann. Im Gegensatz zu Untersuchungen zur „akuten“ Form der Psoriasis, der Psoriasis guttata, bei der Superantigen-mediierte Veränderungen des TCR Vbeta Repertoires der Haut im Vergleich zum Blut nachgewiesen werden konnten, fanden wir und auch andere Arbeitsgruppen bei der chronisch-stationären Form der Psoriasis keine Veränderungen des TCR Vbeta Repertoires der Haut, das für einen Superantigen-mediierten Effekt spricht. Aus diesen und anderen Befunden entwickelten wir ein pathophysiologisches Konzept der Psoriasis, bei dem Superantigene zwar in die Induktion, nicht jedoch in die Aufrechterhaltung des Erkrankungsprozesses involviert sind. ...
In der vorliegenden, randomisierten Doppelblindstudie wurde bei 48 Patienten mit gesicherter koronarer Herzerkrankung die Dosis-Wirkungs-Beziehung eines neuen, antianginös wirksamen Pharmakons mit dem Namen Trimetazidine (TMZ) in den Dosierungen 3 mg, 6 mg und 16 mg gegenüber Placebo untersucht. Zusätzlich sollte die Beeinflussung der Hämodynamik nach Gabe dieses Medikamenten untersucht werden. Frühere tierexperimentelle Untersuchungen (4,7,12,24,30,35,38,39) und klinische Untersuchungen an Patienten mit koronarer Herzkrankheit , die mit einer oralen oder intravenösen Gabe von Trimetazidine behandelt wurden, hatten eine antiischämische Wirksamkeit der Substanz ohne Beeinflussung hämodynamischer Parameter ergeben (7,11,26,30,34). Nach den bisher vorliegenden pharmakologischen Untersuchungen ist anzunehmen, dass die antiischämische Wirkung von Trimetazidine nicht über die Beeinflussung der Hämodynamik, sondern wahrscheinlich auf einer Stabilisierung der myokardialen ATP- Depots und der elektrischen Membranpotentiale während einer Ischämie beruht und somit TMZ einen direkt myokardprotektiven Effekt besitzt (11,13,14,24,35,41). In der vorliegenden Studie wurden während Perkutaner Transluminaler Koronarer Angioplastie (PTCA), 3, 6 oder 16 mg TMZ oder Placebo intrakoronar injiziert und in weiteren Dilatationen die Beeinflussung der PTCA-bedingten Ischämie durch TMZ untersucht. Zur Beurteilung der antianginösen Wirksamkeit von Trimetazidine wurden die ST-Strecken zum Ausgangszeitpunkt mit den maximalen ST-Strecken-Änderungen während der jeweiligen Okklusionen in den vier verschiedenen Therapiegruppen vergl ichen. Zusätzlich wurden die Ausbildungszeiten der maximalen ST-Strecken-Änderungen und deren Rückbildungszeiten in den vier Gruppen (Placebo, 3 mg, 6 mg und 16 mg TMZ) untersucht. Die Untersuchungen ergaben keine signifikanten Unterschiede zwischen den vier Gruppen sowohl vor, als auch nach der Gabe von TMZ bzw. von Placebo. Es wurde keine Beeinflussung der hämodynamischen Parameter unter Trimetazidine (systemischer Blutdruck, intrakoronarer Blutdruck und Herzfrequenz) beobachtet, was auf Grund einer früheren Studie auch erwartet wurde. Die subjektiv eingeschätzten pektanginösen Beschwerden blieben vor und nach der Gabe von TMZ / Placebo gleich. Die während der Untersuchung beobachteten Nebenwirkungen waren gering und nicht auf die Gabe vom TMZ zurückzuführen. Nach gewissenhafter Abwägung der Ergebnisse und dem Vergleich mit den Daten aus der Literatur scheinen weitere Untersuchungen mit vergleichbarem Studienau fbau an einem grösseren Patientenkollektiv und - um ein homogeneres Patientenko llektiv zu erhalten - bei Beschränkung der Dilatationen auf nur ein Gefäss, vorzug sweise den RIVA wünschenswert, um das Ausmass der antiischämischen Wirkung und die Dosis-Wirkungs-Effekte von TZM weiter zu erforschen.
We aimed to evaluate the factors associated with hemorrhage (HA) of melanoma brain metastases (MBM) after Cyberknife stereotactic radiosurgery (SRS) in the modern era of systemic therapy. A total of 55 patients with 279 MBM were treated in 93 fractions. The median age, SRS dose, radiological follow-up, and time to HA were 60.4 years, 20 Gy, 17.7 months, and 10.7 months, respectively. Radiologically evident HA was documented in 47 (16.8%) metastases. Of the 55 patients, 25 (45.4%) suffered an HA. Among those, HA caused grade 3 toxicity in 10 patients (40%) and grade 1 symptoms in 5 patients (20%). Ten patients (40%) with HA experienced no toxicity. Logistic regression revealed the use of anticoagulants and the administration of systemic therapy within 7/15 days from SRS to be predictive for HA. When considering the HA causing grade 3 symptomatology, only the use of anticoagulants was significant, with the delivery of whole brain radiation therapy (WBRT) before the HA narrowly missing statistical significance. Our retrospective analysis showed that the administration of modern systemic therapy within 7/15 days from SRS may contribute to HA of MBM, though it appears safe, at least concerning grade 3 toxicity. The use of anticoagulants by the time of SRS significantly increased the risk of HA.
BACKGROUND: Transient episodes of ischemia in a remote organ or tissue (remote ischemic preconditioning, RIPC) can attenuate myocardial injury. Myocardial damage is associated with tissue remodeling and the matrix metalloproteinases 2 and 9 (MMP-2/9) are crucially involved in these events. Here we investigated the effects of RIPC on the activities of heart tissue MMP-2/9 and their correlation with serum concentrations of cardiac troponin T (cTnT), a marker for myocardial damage.
METHODS: In cardiosurgical patients with cardiopulmonary bypass (CPB) RIPC was induced by four 5 minute cycles of upper limb ischemia/reperfusion. Cardiac tissue was obtained before as well as after CPB and serum cTnT concentrations were measured. Tissue derived from control patients (N = 17) with high cTnT concentrations (≥0.32 ng/ml) and RIPC patients (N = 18) with low cTnT (≤0.32 ng/ml) was subjected to gelatin zymography to quantify MMP-2/9 activities.
RESULTS: In cardiac biopsies obtained before CPB, activities of MMP-2/9 were attenuated in the RIPC group (MMP-2: Control, 1.13 ± 0.13 a.u.; RIPC, 0.71 ± 0.12 a.u.; P < 0.05. MMP-9: Control, 1.50 ± 0.16 a.u.; RIPC, 0.87 ± 0.14 a.u.; P < 0.01), while activities of the pro-MMPs were not altered (P > 0.05). In cardiac biopsies taken after CPB activities of pro- and active MMP-2/9 were not different between the groups (P > 0.05). Spearman's rank tests showed that MMP-2/9 activities in cardiac tissue obtained before CPB were positively correlated with postoperative cTnT serum levels (MMP-2, P = 0.016; MMP-9, P = 0.015).
CONCLUSIONS: Activities of MMP-2/9 in cardiac tissue obtained before CPB are attenuated by RIPC and are positively correlated with serum concentrations of cTnT. MMPs may represent potential targets for RIPC mediated cardioprotection.
TRIAL REGISTRATION: ClinicalTrials.gov identifier NCT00877305.
Das kolorektale Karzinom stellt die zweithäufigste Krebstodesursache bei Männern und Frauen in der Bundesrepublik Deutschland dar
Das CRC hat aus diesem Grund eine große Bedeutung in chirurgischen und radiologischen Fachgebieten. Hierbei spielen zahlreiche Verfahren und Behandlungsmethoden eine zentrale Rolle, um das CRC und die hiervon ausgehenden kolorektalen Lebermetastasen zu behandeln und eine bestmögliche Therapie zu evaluieren. Über die letzten Jahrzehnte haben sich daher viele verschiedene Methoden für die Behandlung von CRLMs entwickelt, wie Mikrowellenablation (MWA), laserinduzierte interstitielle Thermotherapie (LITT), Radiofrequenzablation (RFA) und das chirurgische Vorgehen. Die vielversprechendste unter den Techniken und Verfahren stellt die chirurgische Resektion dar. Problematisch ist hierbei, dass viele erkrankte Patienten keine ausreichend gute körperliche Verfassung mehr aufweisen, um eine Resektion ohne große Risiken durchführen zu können.
Das Hauptziel dieser Studie war es nun, eine möglichst genaue und
aussagekräftige Untersuchung von Patientengruppen durchzuführen, bei denen eine kolorektale Lebermetastase diagnostiziert wurde. In der vorliegenden Studie wurden 132 Patienten mit kolorektalen Lebermetastasen (CRLM) untersucht, welche zwischen 2010 und 2018 mit einer CT-gesteuerten MWA-Therapie im Institut für Diagnostische und Interventionelle Radiologie des Universitätsklinikums in Frankfurt am Main behandelt wurden. Hierbei war von besonderer Bedeutung, welche prognostischen Parameter die Überlebenszeiten und Überlebensraten beeinflussen. Die Daten konnten anhand von vielfältigen Personendaten und den dazugehörigen Therapieverläufen erhoben werden. Außerdem wurden CT-Bilder, welche im Zuge der Behandlung entstanden waren, für die Erhebung zusätzlicher Parameter verwendet. Die erhobenen Daten und Messwerte wurden retrospektiv ermittelt und umfassten eine große Patientengruppe. Dies steigert die Aussagekraft der Ergebnisse und Kennzahlen wesentlich. Ein besonderes Augenmerk lag auf der Einteilung der Patienten in zwei Gruppen entsprechend ihrer Behandlungsindikation.
Zu den prognostischen Faktoren zählten das Ablationssystem, die Lokation der Metastasen, die Anzahl der Metastasen, der technische Erfolg, die Energie und Leistung, der Durchmesser und das Volumen der Metastasen, die Vor- und Nachbehandlung und die Lokalrezidive.
Die Patientengruppe mit palliativer Therapieindikation (1.08 Jahre) zeigte eine signifikant geringere mediane Überlebenszeit im Vergleich mit der kurativen Patientengruppe (3.48 Jahre). Die mediane Überlebenszeit aller Patienten betrug insgesamt 2.68 Jahre. Zusätzlich wurden die Überlebensraten der Patienten ermittelt. Die 1- und 3-Jahres-Überlebensraten aller behandelten Patienten im Untersuchungszeitraum lagen bei 82.7% und 41.6%. Die 1- und 3-JahresÜberlebensraten der 57 Patienten mit palliativer Behandlungsindikation waren 54.4% und 14.9%. Im Vergleich hierzu betrugen die 1- und 3-JahresÜberlebensraten der kurativ behandelten Patientengruppe 96.9% und 55.1%. Die mediane Beobachtungszeit nach der Behandlung betrug 2.39 Jahre. In dieser Zeit erreichten 96.2% aller Patienten eine lokale Tumorkontrolle (127/132). Die Überlebenszeit von Patienten mit einer, zwei oder drei, vier oder fünf und multiplen Lebermetastasen betrug 3.79, 2.13, 1.09 und 0.93 Jahre (alle p<0,017). Es gab eine einzige relevante Komplikation (Abszess) bei allen Behandlungen (1/257; 0,4%). Alle Unterschiede der Überlebenszeiten im primären Tumorursprung (p <0,038) und bei der Anzahl der Metastasen waren signifikant. Die anderen prognostischen Faktoren zeigten keine statistische Signifikanz. Prognostische Faktoren wie die Anzahl der Lebermetastasen, die Lokation des Primärtumors und das verwendete Ablationssystem haben einen bedeutenden Einfluss auf die Überlebenszeiten der CRLM-Patienten in dieser Studie gezeigt. Die Ergebnisse dieser Studie sind als vornehmlich anzusehen, weil eine strenge Zuteilung der Patienten in kurative und palliative Behandlungsindikationen für die Analyse der Überlebensdaten in dieser Form bis zu diesem Zeitpunkt nicht durchgeführt worden war.
Die Prognosefaktoren und deren Einfluss auf die Überlebenszeiten stellen für zukünftige radiologische Prognosen und Therapiemaßnahmen in Bezug auf CRLM Patienten gute Richtwerte dar. Sowohl für die Radiologen und Ärzte als auch für die Patienten und Angehörigen sind dies zukunftsweisende Anhaltspunkte.
Die Allgemeinanästhesie ermöglicht die zahnärztliche Sanierung bei Patienten, deren Behandlung unter konventionellen Bedingungen nicht erfolgen kann. In der vorliegenden retrospektiven Studie wurden die Daten zu 430 im Zeitraum von 1997 bis 2006 im Zahnärztlichen Universitätsinstitut Carolinum der Johann Wolfgang Goethe-Universität Frankfurt am Main bei 382 Patienten durchgeführten ambulanten zahnärztlichen Vollnarkosen (Gruppe 3G) erfasst und ausgewertet. Ziele der Arbeit waren die Untersuchung der Eingriffe in Bezug auf Organisation, Patientencharakteristika, Therapiekonzepte und therapeutische Maßnahmen sowie die Evaluation des Bedarfs nach Veränderungen. Die Sanierungen erfolgten bei Patienten aller Altersgruppen und unterschiedlicher Morbiditätsgrade. In 84,4 % der Fälle waren die Patienten älter als 6 Jahre. Der Altersdurchschnitt beim untersuchten Kollektiv betrug 25 Jahre. Die Mehrzahl der Patienten hatte schwere Allgemeinerkrankungen, geistige Behinderungen und motorische Störungen. Hauptindikation für die Behandlung in Vollnarkose war die unzureichende Kooperationsfähigkeit der Patienten für die Behandlung in Lokalanästhesie und ein hoher Sanierungsbedarf. An 10,5 % der Termine erfolgte die Therapie bei kooperationsunwilligen Kleinkindern. Gruppe 3G umfasste die chirurgischen (Gruppe 3C), konservierenden (Gruppe 3K) und kombiniert konservierenden und chirurgischen Sanierungen (Gruppe 3K + C). Es erfolgte eine gesonderte Auswertung der Behandlungen in der jeweiligen Subgruppe und die Gesamtauswertung in der Gruppe 3G. Das untersuchte Patientenkollektiv hatte einen niedrigen Sanierungsgrad und einenhohen Sanierungsbedarf. Infolgedessen wurde in allen Gruppen eine umfangreiche Therapie durchgeführt. Die häufigsten therapeutischen Maßnahmen waren die Restauration mittels plastischer Füllungsmaterialien und die Zahnextraktion. An einzelnen Terminen erfolgten prothetische und parodontologische Behandlungen. In der Gruppe 3G wurden pro Intervention durchschnittlich 5,6 Zahnflächen mittels 2,9 Füllungen restauriert und 6,5 Zähne extrahiert. Bei der Kohorte der Kinder im Alter von bis zu 6 Jahren waren 3,8 Füllungen an 7,5 Zahnflächen und 7,6 Extraktionen pro Patient festzustellen. Aus der jährlichen Verteilung der Füllungswerkstoffe werden ein Rückgang in der Anwendung des Amalgams und der Trend zur Verwendung adhäsiver Materialien deutlich. Die prä- und intraoperative Befunderhebung hat sich bei dem untersuchten Patientengut als sehr schwierig herausgestellt. Aufgrund fehlender Mitarbeit der Patienten konnte die röntgenologische Untersuchung in 35,6 % der Fälle nicht durchgeführt werden. Durch Einrichtung einer intraoperativen Röntgenmöglichkeit könnte eine genauere Diagnostik und Therapieplanung erzielt werden. Abschließend werden Therapiekonzepte für die Behandlung in Vollnarkose, die Compliance der Patienten für präventive Maßnahmen, die Inzidenz der Mehrfachbehandlungen in Allgemeinanästhesie und die Einführung eines strukturierten Recalls diskutiert.
Background and Objectives: We tested if a novel combination of predictors could improve the accuracy of outcome prediction after transfemoral transcatheter aortic valve implantation (TAVI). Materials and Methods: This prospective study recruited 169 participants (49% female; median age 81 years). The primary endpoint was midterm mortality; secondary endpoints were acute Valve Academic Research Consortium (VARC)-3 complication rate and post-TAVI in-hospital length of stay (LoS). EuroSCORE II (ESII), comorbidities (e.g., coronary artery disease), eGFR (estimated glomerular filtration rate; based on cystatin C), hemoglobin, creatinine, N-Terminal pro-Brain Natriuretic Peptide (NTproBNP) levels and patient-reported outcome measures (PROMs, namely EuroQol-5-Dimension-5-Levels, EQ5D5L; Kansas City Cardiomyopathy Questionnaire, KCCQ; clinical frailty scale, CFS) at baseline were tested as predictors. Regression (uni- and multi-variate Cox; linear; binary logistic) and receiver operating characteristic (ROC)-curve analysis were applied. Results: Within a median follow-up of 439 (318–585) days, 12 participants died (7.1%). Independent predictors of mortality using multivariate Cox regression were baseline eGFR (p = 0.001) and KCCQ (p = 0.037). Based on these predictors, a Linear Prediction Score (LPS1) was calculated. The LPS1-area under the curve (AUC)-value (0.761) was significantly higher than the ESII-AUC value (0.597; p = 0.035). Independent predictors for LoS > 6 days (the median LoS) were eGFR (p = 0.028), NTproBNP (p = 0.034), and EQ5D5L values (p = 0.002); a respective calculated LPS2 provided an AUC value of 0.677 (p < 0.001). Eighty participants (47.3%) experienced complications. Male sex predicted complications only in the univariate analysis. Conclusions: The combination of KCCQ and eGFR can better predict midterm mortality than ES II alone. Combining eGFR, NTproBNP, and EQ5D5L can reliably predict LoS after TAVI. This novel method improves personalized TAVI risk stratification and hence may help reduce post-TAVI risk.
Background: The aim of this study was to identify pre-operative parameters able to predict length of stay (LoS) based on clinical data and patient-reported outcome measures (PROMs) from a scorecard database in patients with significant aortic stenosis who underwent TAVI (transfemoral aortic valve implantation). Methods: 302 participants (51.7% males, age range 78.2–84.2 years.) were prospectively recruited. After computing the median LoS value (=6 days, range = 5–8 days), we implemented a decision tree algorithm by setting dichotomized values at median LoS as the dependent variable and assessed baseline clinical variables and PROMs (Clinical Frailty Scale (CFS), EuroQol-5 Dimension-5 Levels (EQ-5D) and Kansas City Cardiomyopathy Questionnaire (KCCQ)) as potential predictors. Results: Among clinical parameters, only peripheral arterial disease (p = 0.029, HR = 1.826) and glomerular filtration rate (GFR, cut-off < 33 mL/min/1.73 m2, p = 0.003, HR = 2.252) were predictive of LoS. Additionally, two PROMs (CFS; cut-off = 3, p < 0.001, HR = 1.324 and KCCQ; cut-off = 30, p = 0.003, HR = 2.274) were strong predictors. Further, a risk score for LoS (RS_LoS) was calculated based on these predictors. Patients with RS_LoS = 0 had a median LoS of 5 days; patients RS_LoS ≥ 3 had a median LoS of 8 days. Conclusions: based on the pre-operative values of the above four predictors, a personalized prediction of LoS after TAVI can be achieved.
CXCL12-CXCR4 signaling controls multiple physiological processes and its dysregulation is associated with cancers and inflammatory diseases. To discover as-yet-unknown endogenous ligands of CXCR4, we screened a blood-derived peptide library for inhibitors of CXCR4-tropic HIV-1 strains. This approach identified a 16 amino acid fragment of serum albumin as an effective and highly specific CXCR4 antagonist. The endogenous peptide, termed EPI-X4, is evolutionarily conserved and generated from the highly abundant albumin precursor by pH-regulated proteases. EPI-X4 forms an unusual lasso-like structure and antagonizes CXCL12-induced tumor cell migration, mobilizes stem cells, and suppresses inflammatory responses in mice. Furthermore, the peptide is abundant in the urine of patients with inflammatory kidney diseases and may serve as a biomarker. Our results identify EPI-X4 as a key regulator of CXCR4 signaling and introduce proteolysis of an abundant precursor protein as an alternative concept for chemokine receptor regulation.
Evoked potentials (EPs) are well established in clinical practice for diagnosis and prognosis in multiple sclerosis (MS). However, their value is limited to the assessment of their respective functional systems. Here, we used transcranial magnetic stimulation (TMS) coupled with electroencephalography (TMS-EEG) to investigate cortical excitability and spatiotemporal dynamics of TMS-evoked neural activity in MS patients. Thirteen patients with early relapsing–remitting MS (RRMS) with a median Expanded Disability Status Scale (EDSS) of 1.0 (range 0–2.5) and 16 age- and gender-matched healthy controls received single-pulse TMS of left and right primary motor cortex (L-M1 and R-M1), respectively. Resting motor threshold for L-M1 and R-M1 was increased in MS patients. Latencies and amplitudes of N45, P70, N100, P180, and N280 TMS-evoked EEG potentials (TEPs) were not different between groups, except a significantly increased amplitude of the N280 TEP in the MS group, both for L-M1 and R-M1 stimulation. Interhemispheric signal propagation (ISP), estimated from the area under the curve of TEPs in the non-stimulated vs. stimulated M1, also did not differ between groups. In summary, findings show that ISP and TEPs were preserved in early-stage RRMS, except for an exaggerated N280 amplitude. Our findings indicate that TMS-EEG is feasible in testing excitability and connectivity in cortical neural networks in MS patients, complementary to conventional EPs. However, relevance and pathophysiological correlates of the enhanced N280 will need further study.
Aim: The aim of this study was to measure cortico-cortical connectivity in multiple sclerosis (MS) patients by TMS-evoked potential (TEP) latencies in EEG evoked by transcranial magnetic stimulation (TMS) of the hand area of the primary motor cortex of one hemisphere. TEPs were recorded on the stimulated- and at the homologue site in the non-stimulated contralateral hemisphere. Both interhemispheric directions were tested. Interhemispheric latencies of the two main reproducible TEPs, the positive component at 60 ms and the negative component at 100 ms (P60 and N100, respectively), were expected to be significantly prolonged in MS-patients compared to healthy volunteers.
Material and methods: The study compared interhemispheric propagation of P60 and N100 in groups of 12 patients with early-stage relapsing-remitting MS (RRMS) and 16 age- and gender-matched healthy controls. The study was approved by the Ethics Committee of the Medical Faculty of the Goethe-University of Frankfurt/Main and conformed to the latest revision of the Declaration of Helsinki of 2008. TEPs were recorded by means of EEG and their latencies were statistically evaluated in 10 channels around the stimulation site and in 10 corresponding electrodes in the non-stimulated contralateral hemisphere. Interhemispheric conduction time was calculated by the difference of TEP latency in non-stimulated vs. stimulated hemisphere.
Results: An ANOVA on interhemispheric conduction time showed a significant prolongation for the N100 from left to right hemisphere in MS compared to controls, while no group differences were found for the P60 and the N100 from right to left hemisphere.
Conclusion: The results provide first evidence that the N100 may constitute an interesting marker to measure interhemispheric conduction delays in early-stage RRMS. The specificity of the present finding and its relation to fiber tract pathology should be examined in further correlative analyses with diffusion tensor imaging and other structural MRI data.
Purpose: The aim of this study is to record material- and surface-dependent heat dissipation during the process of inserting implants into native animal bone. Materials and Methods: Implants made of titanium and zirconium that were identical in macrodesign were inserted under controlled conditions into a bovine rib tempered to 37 °C. The resulting surface temperature was measured on two bone windows by an infrared camera. The results of the six experimental groups, ceramic machined (1), sandblasted (2), and sandblasted and acid-etched surfaces (3) versus titanium implants with the corresponding surfaces (4, 5, and 6) were statistically tested. Results: The average temperature increase, 3 mm subcrestally at ceramic implants, differed with high statistical significance (p = 7.163 × 10−9, resulting from group-adjusted linear mixed-effects model) from titanium. The surface texture of ceramic implants shows a statistical difference between group 3 (15.44 ± 3.63 °C) and group 1 (19.94 ± 3.28 °C) or group 2 (19.39 ± 5.73 °C) surfaces. Within the titanium implants, the temperature changes were similar for all surfaces. Conclusion: Within the limits of an in vitro study, the high temperature rises at ceramic versus titanium implants should be limited by a very slow insertion velocity.
AMP-activated protein kinase (AMPK) is frequently reported to phosphorylate Ser1177 of the endothelial nitric-oxide synthase (eNOS), and therefore, is linked with a relaxing effect. However, previous studies failed to consistently demonstrate a major role for AMPK on eNOS-dependent relaxation. As AMPK also phosphorylates eNOS on the inhibitory Thr495 site, this study aimed to determine the role of AMPKα1 and α2 subunits in the regulation of NO-mediated vascular relaxation. Vascular reactivity to phenylephrine and acetylcholine was assessed in aortic and carotid artery segments from mice with global (AMPKα−/−) or endothelial-specific deletion (AMPKαΔEC) of the AMPKα subunits. In control and AMPKα1-depleted human umbilical vein endothelial cells, eNOS phosphorylation on Ser1177 and Thr495 was assessed after AMPK activation with thiopental or ionomycin. Global deletion of the AMPKα1 or α2 subunit in mice did not affect vascular reactivity. The endothelial-specific deletion of the AMPKα1 subunit attenuated phenylephrine-mediated contraction in an eNOS- and endothelium-dependent manner. In in vitro studies, activation of AMPK did not alter the phosphorylation of eNOS on Ser1177, but increased its phosphorylation on Thr495. Depletion of AMPKα1 in cultured human endothelial cells decreased Thr495 phosphorylation without affecting Ser1177 phosphorylation. The results of this study indicate that AMPKα1 targets the inhibitory phosphorylation Thr495 site in the calmodulin-binding domain of eNOS to attenuate basal NO production and phenylephrine-induced vasoconstriction.
Akzidentielle Injektion eines unbekannten Notfallantidots zur Acetylcholinesteraseaktivierung
(2021)
Aufgrund wachsender Evidenz zu guten Langzeitergebnissen und geringen Komplikationsraten gewinnt die Prostataarterienembolisation (PAE) in der Therapie des Benignen Prostatasyndroms an Bedeutung. Durch ihren hohen technischen Anspruch bedarf es im Vorfeld einer umfassenden Untersuchung der Beckengefäßanatomie. Das Vorliegen eines zum Teil jungen Patientenkollektivs rückt zudem das Einsparen von Strahlung in den Fokus. In diesem Rahmen gewinnt die Magnet-Resonanz-Angiografie (MRA) an Aufmerksamkeit. Obwohl bereits erste Studien Erfolg versprechen, wird die MRA zur PAE-Planung zum Teil kritisch betrachtet, da sie aufwändiger und in der Auflösung unterlegen sei. In dieser Arbeit wurde untersucht, welche Vorteile die MRA im Zuge der PAE-Planung bietet und ob die klinische Effektivität der PAE unbeeinträchtigt bleibt. Weiterhin wurde untersucht, ob eine erfolgreiche MRA-geführte Planung die benötigte Strahlendosis reduziert.
In diese retrospektive Analyse wurden 56 Patienten, die zwischen Januar 2017 und April 2018 im Frankfurter Institut für Diagnostische und Interventionelle Radiologie eine PAE erhielten und bei denen ein vollständiger, die Interventionszeit und Strahlungsparameter umfassender Datensatz sowie eine MRA vor der PAE vorlagen, eingeschlossen. Zusätzlich wurden mittels International Prostate Symptom Score (IPSS), Quality of Life (QoL) und International Index of Erectile Function (IIEF) klinische Daten vor und nach der PAE erhoben. In der Magnet-Resonanz-Tomografie (MRT) vor der PAE wurden das Prostatavolumen, die Intravesical Prostatic Protrusion (IPP) und der Prostatic Urethral Angle (PUA) untersucht. Zur Analyse der Prostataarterie wurden Maximum Intensity Projection (MIP) und ein dreidimensionales Modell verwendet. Um die Auswirkungen einer erfolgreichen Urspungsanalyse auf Interventionszeit und Strahlungsparameter zu untersuchen, wurden diese Faktoren zwischen zwei Gruppen verglichen. In der ersten Gruppe konnte die Prostataarterie mittels MRA ermittelt werden, in der zweiten Gruppe war dies v.a. aufgrund von technischen Mängeln der Bildakquisition nicht möglich.
Der Nachweis des Ursprungs gelang bei 84,73% (111 von 131) der Prostataarterien, davon entsprangen 52,25% der A. pudenda interna, 18,92% zusammen mit der A. vesicalis superior, 13,51% seltenen Ursprüngen, 10,81% der A. obturatoria und 4,51% der vorderen Division der A. iliaca interna unterhalb der A. vesicalis inferior. Die Gruppe mit erfolgreicher Ursprungsanalyse mittels MRA zeigte signifikant geringere Werte in Fluoroskopiezeit (-26,96%, p = 0,0282), Dosisflächenprodukt (-38,04%, p = 0,0025) und Eingangsdosis (-37,10%, p = 0,0020). Die PAE bedingte eine signifikante Verbesserung in IPSS (p < 0,0001), Lebensqualität (p < 0,0001) und IIEF (p = 0,0016), dabei konnte der von den Patienten angegebene IPSS-Wert um durchschnittlich 9,42 Punkte (-43,37%) und der QoL-Wert um 2 Punkte (-50,00%) reduziert werden. Das Prostatavolumen (p < 0,0001), IPP (p = 0,0004) und PUA (p < 0,0001) zeigten sich ebenfalls signifikant reduziert. Das Volumen der Prostata schrumpfte um 4,92 ml (-8,35%), die IPP um 1,2 mm (-9,2%) und der PUA um 5,5° (-8,10%). Signifikante Zusammenhänge konnten zwischen IPSS- und QoL-Reduktion (p < 0,0001, r = 0,7555), sowie zwischen Höhe des IPSS vor der PAE und der absoluten IPSS-Reduktion (p = 0,0041, r = -0,4434) nachgewiesen werden.
Die MRA ermöglicht eine strahlungsfreie Analyse des Abgangs der Prostataarterie. Durch diese Auswertung konnte die benötigte Strahlendosis signifikant reduziert werden. Die MRA-geplante PAE erzielte eine deutliche Verbesserung der Symptomatik und der Lebensqualität. Die erektile Funktion konnte signifikant verbessert werden. Prostatavolumen, IPP und PUA zeigten zwar signifikante Veränderungen, wiesen jedoch keinen Zusammenhang zu klinischen Entwicklungen auf. Zwischen dem Ausgangsvolumen der Prostata und dem klinischen Ergebnis konnte ebenfalls keine signifikante Korrelation festgestellt werden, jedoch scheint der Ausgangswert des IPSS eine prädiktive Funktion zu haben.
Die MRA-geplante PAE ist klinisch effektiv und ermöglicht durch die Analyse der Prostataarterie eine Reduktion der benötigten Strahlung. Zusammen mit der MRT unterstützt sie die Indikationsstellung und Planung der PAE.
The interaction of Eph receptor tyrosine kinases with their transmembrane ligands; the ephrins, is important for the regulation of cell-cell communication. Ephrin-Eph signaling is probably best known for the discrimination of arterial and venous territories by repulsion of venous endothelial cells away from those with an arterial fate. Ultimately, cell repulsion is mediated by initiating the collapse of the actin cytoskeleton in membrane protrusions. Here, we investigated the role of the Ena/VASP family of actin binding proteins in endothelial cell repulsion initiated by ephrin ligands. Human endothelial cells dynamically extended sheet-like lamellipodia over ephrin-B2 coated surfaces. While lamellipodia of control siRNA transfected cells rapidly collapsed, resulting in a pronounced cell repulsion from the ephrin-B2 surfaces, the knockdown of Ena/VASP proteins impaired the cytoskeletal collapse of membrane protrusions and the cells no longer avoided the repulsive surfaces. Mechanistically, ephrin-B2 stimulation elicited the EphB-mediated tyrosine phosphorylation of VASP, which abrogated its interaction with the focal adhesion protein Zyxin. Nck2 was identified as a novel VASP binding protein, which only interacted with the tyrosine phosphorylated VASP protein. Nck links Eph-receptors to the actin cytoskeleton. Therefore, we hypothesize that Nck-Ena/VASP complex formation is required for actin reorganization and/or Eph receptor internalization downstream of ephrin-Eph interaction in endothelial cells, with implications for endothelial navigation and pathfinding.
Endothelial tip cells are essential for VEGF-induced angiogenesis, but underlying mechanisms are elusive. Endothelial-specific deletion of EVL, a member of the mammalian Ena/VASP protein family, reduced the expression of the tip cell marker protein endothelial cell specific molecule-1 (Esm1) and compromised the radial sprouting of the vascular plexus in the postnatal mouse retina. The latter effects could at least partly be attributed to reduced VEGF receptor 2 (VEGFR2) internalization and signaling but the underlying mechanisms(s) are not fully understood. In the present study, we revealed that the expression of the long non-coding RNA H19 was significantly reduced in endothelial cells from postnatal EVL-/- mice and in siRNA-transfected human endothelial cells under hypoxic conditions. H19 was recently shown to promote VEGF expression and bioavailability via Esm1 and hypoxia inducible factor 1α (HIF-1α). Similar to EVL-/- mice, the radial outgrowth of the vascular plexus was significantly delayed in the postnatal retina of H19-/- mice. In summary, our data suggests that loss of EVL not only impairs VEGFR2 internalition and downstream signaling, but also impairs VEGF expression and bioavailability in the hypoxic retina via downregulation of lncRNA H19.
Endothelial tip cells are essential for VEGF-induced angiogenesis, but underlying mechanisms are elusive. The Ena/VASP protein family, consisting of EVL, VASP, and Mena, plays a pivotal role in axon guidance. Given that axonal growth cones and endothelial tip cells share many common features, from the morphological to the molecular level, we investigated the role of Ena/VASP proteins in angiogenesis. EVL and VASP, but not Mena, are expressed in endothelial cells of the postnatal mouse retina. Global deletion of EVL (but not VASP) compromises the radial sprouting of the vascular plexus in mice. Similarly, endothelial-specific EVL deletion compromises the radial sprouting of the vascular plexus and reduces the endothelial tip cell density and filopodia formation. Gene sets involved in blood vessel development and angiogenesis are down-regulated in EVL-deficient P5-retinal endothelial cells. Consistently, EVL deletion impairs VEGF-induced endothelial cell proliferation and sprouting, and reduces the internalization and phosphorylation of VEGF receptor 2 and its downstream signaling via the MAPK/ERK pathway. Together, we show that endothelial EVL regulates sprouting angiogenesis via VEGF receptor-2 internalization and signaling.
In higher concentrations, the blood pressure regulating hormone angiotensin II leads to vasoconstriction, hypertension, and oxidative stress by activating NADPH oxidases which are a major enzymatic source of reactive oxygen species (ROS). With the help of knockout animals, the impact of the three predominant NADPH oxidases present in the kidney, i.e., Nox1, Nox2 and Nox4 on angiotensin II-induced oxidative damage was studied. Male wildtype (WT) C57BL/6 mice, Nox1-, Nox2- and Nox4-deficient mice were equipped with osmotic minipumps, delivering either vehicle (PBS) or angiotensin II, for 28 days. Angiotensin II increased blood pressure and urinary albumin levels significantly in all treated mouse strains. In Nox1 knockout mice these increases were significantly lower than in WT, or Nox2 knockout mice. In WT mice, angiotensin II also raised systemic oxidative stress, ROS formation and DNA lesions in the kidney. A local significantly increased ROS production was also found in Nox2 and Nox4 knockout mice but not in Nox1 knockout mice who further had significantly lower systemic oxidative stress and DNA damage than WT animals. Nox2 and Nox4 knockout mice had increased basal DNA damage, concealing possible angiotensin II-induced increases. In conclusion, in the kidney, Nox1 seemed to play a role in angiotensin II-induced DNA damage.
Alle lebenden Organismen sind in der Lage, sich an den re-gelmäßigen Wechsel von Licht und Dunkelheit und den zeitli-che Veränderungen im Takt der Jahreszeiten anzupassen. Die-se Synchronisierung der Aktivitäts- und Ruhephasen, sowie von physiologischen Stoffwechselprozessen an die vorgegebe-nen tageszeitlichen und saisonalen Zyklen findet beim Säu-getier in der inneren Uhr im Nucleus Suprachiasmaticus (SCN) statt. Das Licht, als wichtigster Zeitgeber für die Synchronisation der inneren Uhr, findet Eingang zum SCN über die Retina und den retinohypothalamischen Trakt (RTH), der Glutamat als Neurotransmitter nutzt. Ist dieses System fehlerhaft, führt dies zu Störung der oben beschriebenen Anpassungsprozesse. Dies hat eine gestörte Homöostase des Organismus zu Folge, aus denen sich wiederum Veränderungen im Tag/Nacht- Rhythmus, Schlafstörungen und depressive Ver-stimmungen ergeben können. Die genannten Symptome decken sich mit den Frühsymptomen den neurodegenerativen Erkran-kung Morbus Parkinson.
Ziel der vorliegenden Arbeit war es, Störungen im photoneu-roendokrinen System, insbesondere Veränderungen in der Re-tina an den photosensitiven Ganglienzellen mit dem Photo-pigment Melanopsin und dem SCN bei transgene Mäuse mit dem humanen alpha-Synuclein zu untersuchen. Hierbei wurden transgene Mäuse mit dem gesunden humanen alpha-Synuclein (Wildtyp) und transgene Mäuse mit der für Parkinson spezi-fischen Mutation im alpha-Synuclein Ala53Thr (A53T) vergli-chen.
Die immunochemischen Untersuchungen an Retina und SCN zei-gen einen signifikanten Anstieg der alpha-Synuclein Immun-reaktion bei der A53T Maus im Vergleich zum Wildtyp.
Parallel dazu wurden Unterschiede in Bezug auf das Photo-pigment Melanopsin zwischen den beiden Gruppen untersucht. Melanopsin ist lichtsensitiv und trägt, durch Übermittlung der aktuellen Lichtverhältnisse über den retinohypothalami-schen Trakt zum SCN, zur Synchronisation der circadianen Rhythmik bei. Durch den in dieser Arbeit nachgewiesene Me-lanopsindefizit und des deutlich reduzierten Vglut2 im hy-pothalamischen Trakt der A53T Maus lässt sich die Hypothese ableiten, dass möglicherweise die Überexpression des mu-tierten alpha-Synuclein in der Retina einen Untergang von melanopsinhaltigen Ganglienzellen herbeiführt und dadurch die Synchronisation der inneren Uhr durch Licht gestört ist. Diese Hypothese wird durch die Aktivitätsprofile ge-stützt, die durch die Aufzeichnung der lokomotorischen Ak-tivität der Tiere erstellt wurden.
Da in beiden Gruppen unter Dauerdunkel (DD) ein endogener zirkadianer Rhythmus beobachtet werden konnte, lässt dies auf die Funktionstüchtigkeit der inneren Uhr im SCN schlie-ßen. Im anschließenden Versuch die endogene Rhythmik an exogenen Reize anzupassen, zeigte sich bei dem A53T Stamm eine fehlende Synchronisierung an vorgegebene Lichtverhält-nisse mit gesteigerter Tagaktivität und reduzierten Schlaf-phasen. Somit trägt der fehlerhaft verarbeitete Lichtreiz bei A53T Mutanten zur Destabilisierung des zirkadianen Rhythmus der Lokomotion bei. Trotz des gestörten glutama-tergen Signalweges im retinohypothalamischen Trakt konnten keine Unterschiede in der Expression der Homerproteine zwi-schen Wildtyp und A53T unter Standard-Photoperiode und nach Schlafdeprivation nachgewiesen werden.
Die vorliegenden Befunde liefern Erkenntnisse zur Entste-hung der Frühsymptome bei Morbus Parkinson. Dies könnte neue Ansatzpunkte für die Therapie und Linderung von Schlafstörungen sowie Veränderungen im Tag/Nachtrhythmus liefern.
Zelluläre Zytotoxizität ist ein Phänomen, das für die Wirkung allogener Stammzelltransplantationen verantwortlich gemacht wird. Sie wird zudem genutzt im Rahmen zellulärer Immuntherapien mit Spenderlymphozyten, angereicherten, aktivierten und z.T. gentechnisch veränderten T- und NK-Zellen, Targeting der Antitumor-Immunantwort mit bispezifischen Antikörpern und der Vakzinierung mit dendritischen Zellen. Ihre Messung ist von großer Bedeutung bei der Weiterentwicklung und Validierung solcher Verfahren. In der Klinik für Kinderheilkunde und Jugendmedizin der Johann Wolfgang Goethe-Universität werden gegenwärtig mehrere solcher Verfahren entwickelt und eingesetzt. Eine Zytotoxizitätsmessung insbesondere gegen patienteneigene Leukämieblasten ist daher unerlässlich. Proben von Leukämieblasten aus peripherem Blut oder Knochenmark von Patienten sind heterogen und enthalten in der Regel restliche gesunde Zellen. Diese Zellen verzerren die Messung einer spezifischen Zytotoxizität gegen die Blasten, wenn sie nicht gezielt aus der Auswertung ausgeschlossen werden. Effektorzellen bestehen ebenfalls aus Subpopulationen, die in unterschiedlichem Ausmaß mit den Blasten interagieren. Um solche komplexen Proben adäquat analysieren zu können, sollte ein durchflusszytometrischer Assay unter Ausnutzung des Potenzials monoklonaler Antikörper zur differenziellen Markierung von Zellpopulationen entwickelt werden. Die Auswertung der Leukämietypisierungen von 47 Patienten und Austestung in Frage kommender Antikörper ergab, dass eine Wahl der Antikörper aufgrund des immunologischen Subtyps einer Leukämie nur mit Einschränkung möglich ist, so dass eine Vorabtestung der Antikörper erfolgen muss. Bei Einsatz der Markierung von Proben mit FITC- und PEkonjugierten Antikörper in einem konventionellen durchflusszytometrischen Assay, der die PI positiven Zielzellen an den Gesamtzielzellen als Korrelat der zytotoxischen Aktivität der Effektorzellen maß, traten Diskrepanzen in den Anteilen der Zellpopulationen einer Probe auf. Diese legten den Schluss nahe, dass tote Zellen durch vollständige Fragmentierung einer Messung entgehen. In einer neu konzipierten Assayvariante wurde daher das gegenteilige Konzept gewählt, die Messung des Überlebens der Zellen. Dies wurde ermöglicht durch die Einführung eines internen Standards, der eine durchflusszytometrische Konzentrationsmessung erlaubt. Mit diesem Verfahren wurde gezeigt, dass die Zunahme der mit PI erfassten toten Zellen nur gering mit der Abnahme lebender Zellen korreliert. Die Validierung anhand des Europium-Release-Assays ergab übereinstimmende Ergebnisse dieser zweiten Assayform mit diesem bei signifikantem (P ≤ 0,01, Wilcoxon-Rangtest) Unterschied der ersten Variante. Der im Rahmen dieser Doktorarbeit entwickelte Assay erlaubte zusätzlich die Beurteilung auch des Verhaltens der Effektorzellkonzentrationen. Es wurde gezeigt, dass diese sich bei vorhandener zytotoxischer Aktivität gegen die Zielzellen änderten im Sinne einer initialen Abnahme insbesondere in den geringen Effektor:Zielzell-Ratien und einer erneuten Zunahme bei längerer Kokulturdauer im Sinne einer Proliferationsinduktion durch den Zielzellstimulus. In einem letzten Schritt wurde eine modifizierte Zytometersteuerung und die Markierung CD4 und CD8 positiver T-Zellen in der gleichen Fluoreszenz unter Ausnutzung der unterschiedlichen Fluoreszenzintensitäten eingeführt. Dadurch wurde es möglich, bei vier Fluoreszenzbereichen simultan bis zu fünf verschiedene monoklonale Antikörper zuzüglich Propidiumjodid in einem einzigen Ansatz zu verwenden und so nicht nur lebende Ziel- und Effektorzellen zu differenzieren, sondern durch entsprechende Kombination der Antikörper auch Effektorzellsubpopulationen wie CD4+ und CD8+ T-Zellen in ihrem Verhalten zu beurteilen. Über die gleichzeitige Auswertung von Ziel- und Effektorzellen in verschiedenen Effektor:Zielzell-Ratien erlaubt dieser neue Assay differenzierte Aussagen über das Verhalten und die Reaktivität von Zellen in Kokultur bei einfacher Handhabung, minimaler Zellmanipulation im Verlauf des Assays durch Markierung erst nach Kokultur und hoher Flexibilität in der bearbeiteten Fragestellung.
Bei weltweit steigender Inzidenz von Krebserkrankungen in Verbindung mit den beträchtlichen Kosten für die Therapie und limitierten finanziellen Ressourcen ist eine wirtschaftlich sinnvolle Verteilung der Geldmittel die erstrebenswerteste Strategie um für ein Maximum an Patienten eine den Umständen entsprechend maximal wirksame Therapieform zu ermöglichen. Zur Beurteilung der Kostenentstehung und verteilung bei Krebstherapien wurde eine retrospektive Analyse hinsichtlich der Dauer der verschiedenen Abschnitte der Therapie bei 30 Patienten (13 Frauen, 17 Männer) durchgeführt und die Kosten der unterschiedlichen Behandlungsabschnitte betrachtet. Am Beginn stand dabei die Frage nach der Definition der Start und Endpunkte der einzelnen zeitlichen Intervalle und am Schluß die Ermittlung der Kosten pro Zeiteinheit, um Vergleiche der einzelnen Therapieintervalle auf ökonomischer Basis zu ermöglichen. Dabei ergab sich schon für die relativ kleine Stichprobe mit verschiedensten Anamnesen und Therapiezeiten ein verlängertes kuratives Behandlungsintervall im Gegensatz zu einer im Vergleich kürzeren palliativen Behandlungsdauer. Dabei konnte gezeigt werden, daß die Kosten pro Behandlungstag in der Regel für die kurative Behandlung geringer ausfielen als für die palliative, wobei sich der stationäre Aufenthalt in jedem Fall als maßgeblicher Kostenfaktor herausstellte. Generell scheinen die Ergebnisse darauf hinzudeuten, daß, während sich die kurativen Kosten in gewissen Grenzen prognostizieren lassen, dies bei den palliativen Kosten so nicht vorhersagbar ist. Aufgrund der Qualität der retrospektiv gewonnenen Daten und ihrer eingeschränkten Übertragbarkeit sollte die Wertigkeit dieser Aussage jedoch auch mit der nötigen Kritik betrachtet werden.
Um die Rolle von potentiell schmerzauslösenden Substanzen bei der Entstehung von menschlichem Muskelschmerz und von muskulärer Hyperalgesie zu beurteilen, wurde bei dieser Arbeit das DOMS Muskelschmerzmodell und das hypertone NaCl Muskelschmerzmodell in Kombination mit der Mikrodialysetechnik verwendet. Dabei wurden bei 10 gesunden, untrainierten Probanden metabolische Änderungen im Glucosestoffwechsel (Glucose, Laktat) und Fettstoffwechsel (Glycerol), Änderung der Glutamat Freisetzung und Änderungen von inflammatorischen Mediatoren (PGE2, NO, Substanz P) in den schmerzhaften und in den Kontrollmuskeln untersucht. Studienbegleitend erfolgte zur Beurteilung der Effektivität der Übungen und des dabei entstandenen Muskelschadens die Bestimmung von Serum CK, Serum Laktat, des Muskelumfangs und der Muskeldruckschmerzschwelle (PPT). Die Probanden gaben regelmäßig die Schmerzintensität auf einer visuellen Analogskala (VAS) an. Die DOMS Muskelschmerzen wurden 24 Stunden vor dem Beginn der Mikrodialyse durch konzentrisch/ exzentrische Kontraktionen der Wadenmuskulatur im Verum Bein ausgelöst. Während der Mikrodialyse erfolgte die Schmerzstimulation der Wadenmuskulatur durch Plantar- und Dorsalflexion des Fußes. Die Schmerzauslösung beim hypertonen NaCl Modell geschah während der Mikrodialyse durch sequentielle Injektionen von hypertoner NaCl Lösung ( 5 ∗ 200 µl 5.8% NaCl Lösung in 2 Minuten Intervallen) in den Bizepsmuskel am Oberarm. Die Zuordnung der Behandlung (Verum vs. Kontrollmuskel) erfolgte jeweils nach dem Zufallsprinzip.
Direkt nach den DOMS Übungen kam es zu einem signifikanten Anstieg von Laktat im Serum, nach 24 Stunden zu einem signifikanten Ansteigen der CK Aktivität und einer Zunahme des Muskelumfangs. Mit beiden Modellen konnte zuverlässig ein Muskelschmerz erzeugt werden, wobei die Schmerzintensität bei wiederholter Stimulierung abnahm und dies im DOMS Modell stärker ausgeprägt war. Eine mechanische Hyperalgesie konnte nur an den Waden beobachtet werden, die dort aber beidseitig auftrat und damit eine Art „zentraler Übererregbarkeit“ vermuten lässt. Die Dialysatkonzentrationen von Glutamat, PGE2 und Substanz P zeigten aufgrund der Schmerzstimulation im DOMS Bein einen lokalen Anstieg (Glutamat 125 ± 20 µM [p=0.005], PGE2 239 ± 45 pg/ml, Substanz P 64 ± 11 pg/ml). Dabei traten im Kontrollbein keine signifikanten Änderungen auf. Während der Mikrodialyseperiode war die NO Konzentration im DOMS Bein signifikant geringer als im Kontrollbein (p = 0.02), zeigte dabei aber keine Beeinflussung durch die Schmerzstimulation. Gleichzeitig war dabei die Laktatkonzentration im DOMS Bein im Vergleich zum Kontrollbein erhöht. Die Glucose- und Glycerolkonzentrationen wiesen durch die Schmerzauslösung keine bedeutenden Veränderungen auf.
Im Bizepsmuskel kam es infolge der hypertonen NaCl Injektionen zu einem signifikanten Anstieg der Glutamat Konzentration im Dialysat (50 ± 3 µM, p = 0.003), wobei diese im Kontrollmuskel konstant blieb. Die Injektionen hatten aber keinen Einfluss auf die Werte von Glucose, Laktat, Glycerol, NO, PGE2, des Muskelumfangs und der PPT.
Möglicherweise ist ein inflammatorischer Prozess an den peripheren Mechanismen der Muskelschmerzentstehung beim DOMS Modell beteiligt. Die Injektion von hypertoner NaCl Lösung löst den Muskelschmerz vermutlich direkt durch die hohe extrazelluläre Natrium Konzentration aus, wobei es zu einer Depolarisation der Nozizeptormembran mit einer nachfolgenden Glutamat Freisetzung aus den aktivierten Nozizeptoren kommt. Die Vorteile dieses Modells sind die Wiederholbarkeit und die kurze Dauer des Muskelschmerzes. Die dem ausgelösten Schmerz zugrundeliegenden Mechanismen ähneln jedoch nicht den Mechanismen die dem klinischen Muskelschmerz zugrunde liegen. Deshalb könnte es sein, dass die Bedeutungen der Ergebnisse aus diesem Modell relativ beschränkt sind und die Nützlichkeit insbesondere für pharmakologische Studien damit auch eingeschränkt ist.
Der Neurotransmitter Glutamat ist an den peripheren Mechanismen der Muskelschmerzentstehung beteiligt, da die Glutamat Freisetzung direkt mit dem Muskelschmerz beim DOMS Modell und beim Hypertonen NaCl Modell assoziiert war. Die beim DOMS Modell erhöhten Konzentrationen von Laktat, PGE2, sowie die Änderungen von Substanz P und die erniedrigten NO Konzentrationen könnten auch zu der Entstehung von Muskelschmerz beitragen.
Der beobachtete Rückgang der Schmerzintensität bei wiederholter Stimulierung lässt auf eine Art „Gewöhnung“ schließen, die bei Anwendung des DOMS Modells für pharmakologische Untersuchungen einen Nachteil darstellen könnte.
Einfluss des Lungensports auf die Muskelmasse, Lebensqualität und Lungenfunktion bei COPD-Patienten
(2009)
In der vorliegenden Arbeit wurde die Auswirkung von Lungensport auf die Systemerkrankung COPD untersucht. Es nahmen 42 Patienten mit COPD Gold II-III, die in eine Kontroll- und Studiengruppe aufgeteilt wurden, an der Studie teil. Die Untersuchung fand eineinhalb Jahre lang statt und die Probanden kamen regelmäßig alle 6 Monate zu Untersuchungen. Es wurde mittels BIA-Messung die Muskelmasse, Ernährungs- und Trainingszustand der Probanden gemessen. Ebenso füllte die Studiengruppe regelmäßig einen Lebensqualitäts-Fragebogen aus, den so genannten St. George Respiratory Questionnaire, der speziell für Patienten mit Atemwegserkrankungen erstellt wurde. Ein weiterer Untersuchungsschwerpunkt lag in der Erfassung der Atmungsverbesserung, die mittels Peak Flow und Spirometrie ermittelt wurde. Die Studiengruppe nahm einmal wöchentlich am Lungensport teil. Die Kontrollgruppe trieb keinerlei Sport. Der Lungensport ist ein ambulantes Rehabilitationsprogramm für Lungenkranke, das von einer Diplom-Sportwissenschaftlerin geleitet wird. Ziel der Studie war es zu zeigen, dass Lungensport eine positive Auswirkung auf den Verlauf der COPD, als Systemerkrankung, hat. Die Ergebnisse zeigen, dass die Muskelmasse der Studiengruppe signifikant ansteigt. Ebenso bessert sich der Trainings- und Ernährungszustand der COPD in der Trainingsgruppe signifikant nach längerer Teilnahme. Dies zeigen die Werte des Phasenwinkels (p < 0,01) und des ECM/BCM-Index (p < 0,05) im Vergleich zur Kontrollgruppe nach einem Jahr Teilnahme am Lungensport. Der expiratorische Peak Flow verbessert sich signifikant nach einem Vierteljahr um 5% und nach einem halben Jahr Teilnahme am Lungensport um 10-20%. Am deutlichsten zeigen sich diese Effekte während der Belastungsphase und nach dem Training. Die Lebensqualität der COPD-Patienten verbessert sich gering in der Studiengruppe, die Ergebnisse waren nicht p-signifikant, wobei sich das Gesamtergebnis um 4 Punkte verbessert. Jones P. et al zeigte dass eine Verbesserung um 4 Punkte ein klinisch signifikantes Ergebnisse gibt. Die Ergebnisse dieser Studie zeigen einen positiven Einfluss von Lungensport auf die Körperzusammensetzung und die Lebensqualität der Patienten. Die schädigenden Einflüsse der COPD auf die Körperzusammensetzung können im Vergleich zu sportlich inaktiven Patienten reduziert werden, im Falle der BCM (p < 0,01) ist sogar eine Besserung möglich. Diese Studie repräsentiert einen weiteren Beleg für die Effizienz von Lungensport in der Therapie der COPD. Der Peak Flow ist ein einfacherer Parameter, um die Besserung der Leistungsfähigkeit durch Lungensport objektivieren zu können. Der expiratorische Peak Flow ist ein wichtiger Indikator für die Prognose quod vitam von COPD Patienten, der mindestens ebenso aussagekräftig ist wie der FEV1-Wert. Zusammenfassend ergab die Studie, dass die regelmäßige Teilnahme am Lungensport einen steigernden Effekt auf die Muskelmasse hat und den Ernährungszustand von COPD-Patienten verbessert. Die Lebensqualität verbessert sich klinisch signifikant um 4 Punkte. Man kann also annehmen, dass die COPD Patienten ihre Lebensqualität verbessern. Im Hinblick darauf dass die COPD eine unaufhaltsame, irreversible Systemerkrankung ist, ist dieses Ergebnis als Erfolg anzusehen. Der Lungensport ist als Evidenz basierte Maßnahme in der Behandlung der COPD anzusehen. Lungensport kann ergänzend zu den schon bestehenden etablierten Therapiemethoden, die oft sehr kostenintensiv sind, angewendet werden. Die Kombination des Lungenports und der medikamentösen Therapie hält den Verlauf der COPD auf. Die Teilnahme am Lungensport dient damit gleichfalls zur Verbesserung der Prognose, Lebenserwartung und Lebensqualität der COPD-Patienten. Er leistet neben der medizinischen Relevanz auch einen gesundheitspolitischen Beitrag durch den Einsatz kostendämpfender Maßnahmen. Leider gibt es noch nicht genügend Angebote im Lungensport um die große Anzahl der COPD-Patienten abzudecken. Was könnte getan werden, dass Lungensport etabliert wird? - Lungenfachärzte müssen informiert werden - Krankenkasse sollten die Patienten mehr unterstützen - mehr Lungensport-Gruppen zu alternativen Uhrzeiten
Background: Exercise seems to minimize prostate cancer specific mortality risk and treatment related side effects like fatigue and incontinence. However the influence of physical activity on the immunological level remains uncertain. Even prostate cancer patients undergoing palliative treatment often have a relatively long life span compared to other cancer entities. To optimize exercise programs and their outcomes it is essential to investigate the underlying mechanisms. Further, it is important to discriminate between different exercise protocols and therapy regimes.
Methods/Design: The ProImmun study is a prospective multicenter patient preference randomized controlled trial investigating the influence of a 24 week endurance exercise program in 80–100 prostate cancer patients by comparing patients undergoing Antiandrogen therapy combined with exercise (AE), Antiandrogen therapy without exercise (A), Chemotherapy with exercise(CE) or Chemotherapy without exercise (C). The primary outcome of the study is a change in prostate cancer relevant cytokines and hormones (IL-6, MIF, IGF-1, Testosterone). Secondary endpoints are immune cell ratios, oxidative stress and antioxidative capacity levels, VO2 peak, fatigue and quality of life. Patients of the intervention group exercise five times per week, while two sessions are supervised. During the supervised sessions patients (AE and CE) exercise for 33 minutes on a bicycle ergometer at 70-75% of their VO2 peak. To assess long term effects and sustainability of the intervention two follow-up assessments are arranged 12 and 18 month after the intervention.
Discussion: The ProImmun study is the first trial which primarily investigates immunological effects of a six month endurance exercise program in prostate cancer patients during palliative care. Separating patients treated with Antiandrogen therapy from those who are additionally treated with Chemotherapy might allow a more specific view on the influence of endurance training interventions and the impact of different therapy protocols on the immune function.
Trial registration: German Clinical Trials Register: DRKS00004739
Membrane-Phloretin Interaction, Infrared Raman, ESR Spectroscopy The transport inhibitor phloretin was bound to human red cell membrane and the concomitant structural changes were observed by spectroscopic methods. By the spin labeling method a decrease in fluidity of the membrane was found at 1 and 10 |iM concentrations of the reagent. This result was obtained with the 2-(3-Carboxypropyl)-4,4-dimethyl-2-tridecyl-3-oxazolidinyloxyl, and the 2-(14-Carboxytetradecyl)-2-ethyl-4,4-dimethyl-3-oxazolidinyloxyl lipid spin labels. Infrared spectroscopy of modified membranes revealed an intensity increase of the POO~ band at about 1250 cm-1. Moreover, a shift of the peak at 1050 cm -1 to 1100 cm-1 was observed in the presence of phloretin. Raman spectroscopy of the membranes did not contradict the results found with infrared and ESR spectroscopy: In the phloretin modified membrane we observed a lack of the band at 1085 cm-1, which leads to suggest that the POO" and/or C-C regions are less fluid. Changes of the extracted red cell membrane lipids were less characteristic, and the results differed from those found in red cell membrane.
Die randomisierte, dreiarmig kontrollierte Studie zu täglicher, peroraler Zusatzkost (ONS) bei Hämodialysepatienten (CHD) im Endstadium der Niereninsuffizienz (ESRD) über 6 Monate zeigte keine signifikanten Verbesserungen hinsichtlich folgender Nutritions-/Retentions- und Inflammationsparameter: Subjective Global Assessment (SGA); Body Mass Index (BMI); Querschnitt des Muskulus Iliopsoas,Oberarmumfang und Dicke des Unterhautfettgewebes (MRT); örperzellmasse und Phasenwinkel (Bioimpedanzanalyse BIA); Tumornekrosefaktor α (TNFα); Interleukin 1β und 6 (IL-1β und IL-6); C-Reaktives Protein (CRP). Der Querschnitt des Muskulus biceps brachii blieb in der Kontrollgruppe anfangs und zum Ende höher wie in den Interventionsgruppen. Der Serumkreatininwert der Interventionsgruppe mit HIV war anfangs geringer als in den übrigen Gruppen, die glomeruläre Filtrationsrate entsprechend besser, zum Ende waren diese Unterschiede nivelliert. Der Hauptbefund liegt in der hohen Mortalitätsrate der HIV-positiven Hämodialysepatienten (2 von 7 Pat., 28,6%), von denen beide im SGA als schwer mangel-/fehlernährt eingestuft wurden. Die Therapie eines Malnutritions-Infalmmations-Komplexes ist nicht allein durch orale Zusatzkost möglich. Weitere Studien müssen multimodale Konzepte zur Diagnose und zur Therapie erforschen. Hierzu kann perorale Zusatzkost ein einfach durchzuführendes Mittel als Teil der Behandlungsstrategie sein, zur erweiterten Diagnose kann die Bioimpedanzanalyse eine Möglichkeit sein, um den Teilaspekt der Nutritionskontrolle zu erfüllen.
Einleitung: Die Behandlung stumpfer abdomineller Verletzungen hat sich innerhalb der letzten Jahre zugunsten der konservativen Therapie gewandelt. Die Untersuchung beschäftigt sich mit der Frage, ob nichtoperatives Management von Abdominalverletzungen eine sichere und in der Routine praktikable therapeutische Option darstellt und wie häufig eine Konversion von primär konservativen zu operativen Management durchgeführt werden muß. Methodik: In einem Zeitraum von 3 Jahren (September 2002 bis August 2005) wurden 1214 Patienten über den Schockraum der Uniklinik Frankfurt aufgenommen. Die Datenerhebung und der Behandlungsverlauf erfolgte prospektiv on-line über den gesamten Behandlungsverlauf mittels des on-line Dokumentationsprogrammes Traumawatch´. Ergebnisse: Der durchschnittliche ISS aller Patienten lag bei 15. Eine relevante abdominelle Beteiligung (AIS >3) bestand in 12,4% der Fälle (151 Patienten) mit einem mittleren ISS von 33. Es wurden 60 Leberverletzungen (39,7%), 50 Milzverletzungen (33,1%), Verletzungen des Darms und Mesenterium in 19 Fällen (12,6%), 15 Verletzungen der Niere und der Harnwege(9,9 %) und Verletzungen Bauchdecke bei 28 Patienten (18,5 %) festgestellt. Das Pankreas war bei 3 Patienten (2,0%) und das Zwerchfell bei 8 Patienten (5,3%) betroffen. In 77 Fällen (51%) wurden die Patienten mit Abdominaltrauma primär konservativ, in 74 Fällen (49%) operativ versorgt, 10 Patienten (7%) wurden laparoskopiert. Nur bei 2 Patienten (1,3%) musste eine Konversion von der primär konservativen Therapie in eine operative erfolgen. Es handelte sich hierbei um eine sekundäre Darmperforation und eine zweizeitige Milzruptur. Patienten mit einer Leberverletzung konnten in 65% der Fälle konservativ versorgt werden, Patienten mit Milzverletzung hingegen nur in 50% der Fälle. 32% der operierten Patienten wurden splenektomiert. 4 Patienten, alle mit einem AIS-Abdomen größer oder gleich 4, verstarben im Schockraum noch vor operativer Interventionsmöglichkeit. Schlussfolgerung: Nichtoperatives Vorgehen beim Polytrauma mit abdomineller Beteiligung ist bei hämodynamisch stabilem Patienten weitgehend sicher möglich. Insbesondere für Leberverletzungen bis einem Schweregrad Moore V stellt das primär konservatives Vorgehen eine geeignete therapeutische Option dar.
Plexins are widely expressed transmembrane proteins that mediate the cellular effects of semaphorins. The molecular mechanisms of plexin-mediated signal transduction are still poorly understood. Here we show that signalling via B-family plexins leading to the activation of the small GTPase RhoA requires activation of the IκB kinase (IKK)-complex. In contrast, plexin-B-dependent regulation of R-Ras activity is not affected by IKK activity. This regulation of plexin signalling depends on the kinase activity of the IKK-complex, but is independent of NF-κB activation. We confirm that the IKK-complex is active in tumour cells and osteoblasts, and we demonstrate that plexin-B-dependent tumour cell invasiveness and regulation of osteoblast differentiation require an active IKK-complex. This study identifies a novel, NF-κB-independent function of the IKK-complex and shows that IKK directs plexin-B signalling to the activation of RhoA.
Loperamide, pimozide, and STF-62247 trigger autophagy-dependent cell death in glioblastoma cells
(2018)
Autophagy is a well-described degradation mechanism that promotes cell survival upon nutrient starvation and other forms of cellular stresses. In addition, there is growing evidence showing that autophagy can exert a lethal function via autophagic cell death (ACD). As ACD has been implicated in apoptosis-resistant glioblastoma (GBM), there is a high medical need for identifying novel ACD-inducing drugs. Therefore, we screened a library containing 70 autophagy-inducing compounds to induce ATG5-dependent cell death in human MZ-54 GBM cells. Here, we identified three compounds, i.e. loperamide, pimozide, and STF-62247 that significantly induce cell death in several GBM cell lines compared to CRISPR/Cas9-generated ATG5- or ATG7-deficient cells, pointing to a death-promoting role of autophagy. Further cell death analyses conducted using pharmacological inhibitors revealed that apoptosis, ferroptosis, and necroptosis only play minor roles in loperamide-, pimozide- or STF-62247-induced cell death. Intriguingly, these three compounds induce massive lipidation of the autophagy marker protein LC3B as well as the formation of LC3B puncta, which are characteristic of autophagy. Furthermore, loperamide, pimozide, and STF-62247 enhance the autophagic flux in parental MZ-54 cells, but not in ATG5 or ATG7 knockout (KO) MZ-54 cells. In addition, loperamide- and pimozide-treated cells display a massive formation of autophagosomes and autolysosomes at the ultrastructural level. Finally, stimulation of autophagy by all three compounds is accompanied by dephosphorylation of mammalian target of rapamycin complex 1 (mTORC1), a well-known negative regulator of autophagy. In summary, our results indicate that loperamide, pimozide, and STF-62247 induce ATG5- and ATG7-dependent cell death in GBM cells, which is preceded by a massive induction of autophagy. These findings emphasize the lethal function and potential clinical relevance of hyperactivated autophagy in GBM.
Tiotropium as an add-on treatment option for severe uncontrolled asthma in preschool patients
(2021)
Background: Toddlers with asthma suffer disproportionally more than school-aged children from exacerbations with emergency visits and hospital admissions despite inhaled corticosteroid (ICS) treatment. A recent trial for children ≤ 5 years showed tolerability of tiotropium and potential to reduce asthma-related events.
Methods: We conducted a retrospective analysis of electronic outpatient records (2017‒2019) of children < 6 years treated with ICS plus long-acting β2-agonists (LABAs) plus tiotropium as an add-on for uncontrolled severe asthma. The primary endpoint was a comparison of systemic corticosteroid (SCS) prescriptions 6 months before and after ICS/LABA/tiotropium start. Secondary endpoints included physician visits, hospitalisations and antibiotic prescriptions. We compared outcomes with children without asthma matched for age, sex, season and screening date.
Results: Compared with a mean 2.42 (95% CI: 1.75, 3.36) SCS courses per patient within 6 months prior to ICS/LABA/tiotropium, 0.74 (95% CI: 0.25, 1.08) SCS courses per patient were prescribed within 6 months after starting ICS/LABA/tiotropium (P< 0.001). Physician visits dropped from 9.23 (95% CI: 7.15, 12.72) to 5.76 (95% CI: 3.10, 7.70) per patient (P< 0.01). Nineteen hospitalisations were recorded 6 months before ICS/LABA/tiotropium compared with one hospitalisation after (P< 0.01). A mean 1.79 antibiotic courses (95% CI: 1.22, 2.23) per patient were prescribed before ICS/LABA/tiotropium compared with 0.74 (95% CI: 0.22, 1.00) after ICS/LABA/tiotropium (P< 0.001). Hospitalisation rates for patients at observation end were not statistically different from healthy controls before/after matching.
Interpretation: Our retrospective study showed that adding tiotropium to ICS/LABA is a new treatment option for patients with severe preschool asthma; however, larger confirmatory studies are needed.
Strong dose response after immunotherapy with PQ grass using conjunctival provocation testing
(2019)
Background: Pollinex Quattro Grass (PQ Grass) is an effective, well-tolerated, short pre-seasonal subcutaneous immunotherapy to treat seasonal allergic rhinoconjunctivitis (SAR) due to grass pollen. In this Phase II study, 4 cumulative doses of PQ Grass and placebo were evaluated to determine its optimal cumulative dose.
Methods: Patients with grass pollen-induced SAR were randomised to either a cumulative dose of PQ Grass (5100, 14400, 27600 and 35600 SU) or placebo, administered as 6 weekly subcutaneous injections over 31–41 days (EudraCT number 2017-000333-31). Standardized conjunctival provocation tests (CPT) using grass pollen allergen extract were performed at screening, baseline and post-treatment to determine the total symptom score (TSS) assessed approximately 4 weeks after dosing. Three models were pre-defined (Emax, logistic, and linear in log-dose model) to evaluate a dose response relationship.
Results: In total, 95.5% of the 447 randomized patients received all 6 injections. A highly statistically significant (p < 0.0001), monotonic dose response was observed for all three pre-specified models. All treatment groups showed a statistically significant decrease from baseline in TSS compared to placebo, with the largest decrease observed after 27600 SU (p < 0.0001). The full course of 6 injections was completed by 95.5% of patients. Treatment-emergent adverse events were similar across PQ Grass groups, and mostly mild and transient in nature.
Conclusions: PQ Grass demonstrated a strong curvilinear dose response in TSS following CPT without compromising its safety profile.
Patients with ataxia-telangiectasia (A-T) suffer from progressive cerebellar ataxia, immunodeficiency, respiratory failure, and cancer susceptibility. From a clinical point of view, A-T patients with IgA deficiency show more symptoms and may have a poorer prognosis. In this study, we analyzed mortality and immunity data of 659 A-T patients with regard to IgA deficiency collected from the European Society for Immunodeficiencies (ESID) registry and from 66 patients with classical A-T who attended at the Frankfurt Goethe-University between 2012 and 2018. We studied peripheral B- and T-cell subsets and T-cell repertoire of the Frankfurt cohort and survival rates of all A-T patients in the ESID registry. Patients with A-T have significant alterations in their lymphocyte phenotypes. All subsets (CD3, CD4, CD8, CD19, CD4/CD45RA, and CD8/CD45RA) were significantly diminished compared to standard values. Patients with IgA deficiency (n = 35) had significantly lower lymphocyte counts compared to A-T patients without IgA deficiency (n = 31) due to a further decrease of naïve CD4 T-cells, central memory CD4 cells, and regulatory T-cells. Although both patient groups showed affected TCR-ß repertoires compared to controls, no differences could be detected between patients with and without IgA deficiency. Overall survival of patients with IgA deficiency was significantly diminished. For the first time, our data show that patients with IgA deficiency have significantly lower lymphocyte counts and subsets, which are accompanied with reduced survival, compared to A-T patients without IgA deficiency. IgA, a simple surrogate marker, is indicating the poorest prognosis for classical A-T patients. Both non-interventional clinical trials were registered at clinicaltrials.gov 2012 (Susceptibility to infections in ataxia-telangiectasia; NCT02345135) and 2017 (Susceptibility to Infections, tumor risk and liver disease in patients with ataxia-telangiectasia; NCT03357978)
Die Häufigkeitsrate atopischer Erkrankungen bei Kindern, wie Heuschnupfen, Asthma, Neurodermitis (atopische Dermatitis), nimmt weltweit zu. Die Gründe sind vielschichtig. Gesichert ist der Zusammenhang zwischen der erblichen Überempfindlichkeit gegenüber natürlichen Substanzen (Atopie) und vermehrter Allergen- und Passivrauch-Exposition sowie Zunahme der Ein-Kind-Familien, Veränderung der mikrobiologischen Besiedlung des Darmes und Infektexposition. Besonders gut untersucht wurden diese Zusammenhänge von Erika von Mutius in einer Studie, in der sie von 1991 bis 1992 die Häufigkeit von Asthma in München (5030 Kinder) und Leipzig/Bitterfeld (2623 Kinder) verglichen hat.
Introduction: Cesarean section (CS) rates are increasing worldwide. One constant indication is the breech presentation at term. By offering external cephalic version (ECV) and vaginal breech delivery CS rates can be further reduced. Objective: This study aimed to analyze the ECV at 38 weeks of gestation with the associate uptake rate, predicting factors, success rate, and complications at a tertiary healthcare provider in Germany specializing in vaginal breech delivery. Methods: We conducted a prospective cohort study with retrospective data acquisition. All women with a singleton fetus in breech presentation presenting after 34 weeks of gestation for counseling between 2013 and 2017 were included. ECV impact factors were analyzed using logistic regression. Results: A total of 1,598 women presented for breech birth planning. ECV was performed on 353 patients. The overall success rate was 22.4%. A later week of gestation (odds ratio [OR] 1.69), an abundant amniotic fluid index (AFI score) (OR 5.74), fundal (OR 3.78) and anterior (OR 0.39) placental location, and an oblique lie (OR 9.08) were significantly associated with successful ECV in our population. No major complications were observed. The overall vaginal delivery rates could be increased to approximately 14% with ECV. Conclusion: The demand for alternative birth modes other than CS for breech birth is high in the area of Frankfurt, Germany. Our study offers evidence of the safety of ECV at 38 weeks. Centers with expertise in vaginal breech delivery and ECV can reduce CS-rates. To further establish vaginal breech delivery and ECV as alternate options, the required knowledge and skill should be implemented in the revised curricula.
Reisen sind aus verschiedenen Gründen mit erhöhten gesundheitlichen Risiken verbunden, insbesondere dann, wenn damit lange Reisezeiten, beengte Reiseverhältnisse, klimatische und Ernährungsumstellungen sowie vermehrte physische und psychische Belastungen verbunden sind. Besonders gefährdet sind Reisende, deren Leistungsfähigkeit durch bedeutsame chronische Erkrankungen eingeschränkt sind, wozu die Erkrankungen des kardiovaskulären Formenkreises zählen. Häufig verzichten herzkranke Patienten deshalb auf Urlaubsreisen, weil sie das damit verbundene Gesundheitsrisiko scheuen. Die Deutsche Herzstiftung e. V. und die Deutsche Gesellschaft für Prävention und Rehabilitation von Herz-Kreislauferkrankungen (DGPR) empfehlen daher speziell für Herzkranke angebotene Reisen. Diese sogenannten „Herzreisen“ werden nach strengen Richtlinien durchgeführt und verstehen sich als ärztlich begleitete Gruppenreisen, die spezielle Angebote für Herzkranke enthalten. Hierzu zählen, ähnlich wie in den ambulanten Herzgruppen (AHG), ein tägliches Bewegungs- und Entspannungsprogramm, die Durchführung von Arzt-Patient-Seminaren, Arztsprechstunden sowie spezielle diätetische Angebote und cholesterinreduzierte Mahlzeiten. Diese Reisen und alle in diesem Zusammenhang organisierten Ausflüge werden von 2 bis 3 in der Notfallmedizin erfahrenen Ärzten begleitet, die immer eine Notfallausrüstung (Notfallkoffer, EKG-Gerät, Defibrillator) mit sich führen. Über das Auftreten von Erkrankungen, Komplikationen, Verletzungen und erforderliche ärztliche Kontrolluntersuchungen bei Herzkranken und nicht herzkranken Vergleichspersonen bei Urlaubs- bzw. Herzreisen lagen jedoch bisher keine wissenschaftlichen Daten vor. Ziel dieser prospektiven Untersuchung war es, Erkenntnisse über die Art und Häufigkeit kardiovaskulärer und anderer Komplikationen oder Erkrankungen zu gewinnen, die im Rahmen kommerzieller Urlaubsreisen bei Herz-Kreislaufpatienten auftreten und wie sie von den begleitenden Ärzten allein oder mit Hilfe der medizinischen Einrichtungen vor Ort gelöst werden können. Deshalb wurden die Daten aller Herzpatienten und Begleitpersonen analysiert (n = 588), die in den Jahren 2000 und 2001 an Urlaubsreisen der Firma Kalina, Köln, unter ärztlicher Betreuung teilgenommen haben. Die Datenerfassung der hauptsächlich als Flugreisen angebotenen Herzreisen war durch einen speziell entwickelten Anamnesebogen und ein Sprechstunden-/Betreuungsprotokoll möglich, die vor den Reisen an die begleitenden Ärzte ausgegeben wurden. 421 Herzpatienten (71,6 %) und 165 Begleitpersonen (28,1 %) nahmen an den untersuchten Herzreisen teil. Die Geschlechtsverteilung der Herzpatienten war sehr ausgeglichen ( 48,0 %, 51,8 %), unter den Begleitpersonen befanden sich jedoch deutlich mehr Frauen (82,4 %). Das mittlere Alter der Herzpatienten lag bei 66,5 Jahren, das der Begleitpersonen bei 60,9 Jahren. Die evaluierte Gruppe der Herzpatienten bestand aus teilweise schwer kardial erkrankten Personen, die häufig sogar an mehreren kardialen Erkrankungen gleichzeitig litten. Sie unterschieden sich von den Begleitpersonen vor allem im Bezug auf die Prävalenz von Begleiterkrankungen, (kardialen) Risikofaktoren und die Einnahme kardial wirksamer Medikamente. Wie zu erwarten war, kam es auf Herzreisen zu kardiovaskulären und auch anderen Zwischenfällen, die mit dem speziellen Patientenkollektiv und seinen Vorerkrankungen in Verbindung gebracht werden konnten. Alle Zwischenfälle wurden von den begleitenden Ärzten jedoch sicher gelöst, so dass die ständige Anwesenheit eines Arztes inklusive Notfallausrüstung zu Recht gefordert wird. Nur in Ausnahmefällen kam es zu schwereren Komplikationen, die die begleitenden Ärzten nicht selbst behandeln konnten und die eine ambulante Behandlung bei einem anderen Arzt oder eine stationäre Aufnahme im Krankenhaus notwendig machten. Die auf den Reisen aufgetretenen Komplikationen sind jedoch selten und unterscheiden sich zahlenmäßig nicht von denen, die im Rahmen anderer kardiologischer Rehabilitationen oder der ambulanten Herzgruppen auftreten. Auf Herzreisen muss allerdings aufgrund des speziellen Gefahrenpotentials von Herzpatienten schon aus statistischen Gründen immer mit Komplikationen gerechnet werden. Anders als in Berichten von Krasemann und Laubinger kam es während des 2-jährigen Untersuchungszeitraumes von Herzreisen zu keinem tödlichen Zwischenfall oder zum Auftreten eines Myokard- oder Reinfarktes. Im Vergleich zu den Begleitpersonen traten jedoch überdurchschnittlich mehr allgemeine und leichtere kardiale Probleme und auch medizinisch kritischere Komplikationen auf. Die Ergebnisse unserer Untersuchung bestätigen die Annahmen anderer Autoren, dass Herzreisen sicher durchführbar sind. Sie tragen dem Bedürfnis der Herzpatienten Rechnung, auch im Urlaub ein subjektives Gefühl der Sicherheit durch einen Arzt vermittelt zu bekommen und einen medizinischen Ansprechpartner zu haben, der im Notfall eingreifen kann. Die Herzreisen entsprechen damit wichtigen Zielen in der kardiologischen Rehabilitation und tragen zu einer weiteren Wiedereingliederung in den Alltag bei. Den Patienten wird es trotz Herzerkrankung ermöglicht, mit reduziertem Risiko, betreut in den Urlaub zu fahren und krankheitsangepasste Freizeitaktivitäten durchzuführen. Somit kann die Herzreise einen wichtigen Beitrag in der kardiologischen Rehabilitation leisten.
Hintergrund: Am Fachbereich Medizin der Universität Frankfurt werden jedes Jahr zwischen 15 und 20 neue Projekte zur Verbesserung der Lehre durch den Studienausschuss gefördert. Portfolios zur Skizzierung der Projekte werden von den Zentren und Instituten eingereicht. Diese Projekte haben u.a. die Neustrukturierung von Kursen und Praktika, die Implementierung und Evaluation von Prüfungen (z. B. objective structured clinical evaluation), die Förderung der didaktischen Aus- und Weiterbildung von Dozenten und Tutoren oder die curriculare Einbindung von elektronischen Medien in die Lehre zum Inhalt.
Um diese Projekte untereinander zu koordinieren, wurde im Juni 2006 das Frankfurter Ideenforum für Lehre und Unterricht – kurz FILU – geschaffen.
Ziele des Frankfurter Ideenforums für Lehre und Unterricht
1. Das Forum FILU bietet eine Informationsplattform für die Projektleiter der Lehrverbesserungsprojekte.
2. Das Forum übernimmt die Funktion eines Kondensators für thematisches und informationelles Vernetzungspotential der Projekte untereinander.
3. Übersteigt der Arbeits- und Koordinationsbedarf die Möglichkeiten des Forums, initiiert das FILU neue interdisziplinäre Arbeitsgruppen.
4. Der "Journal Club" innerhalb der Treffen des FILU läßt alle Teilnehmer an der aktuellen Studienlage in Ausbildungsforschung teilhaben.
5. Das Forum FILU engagiert sich dafür, die Aktivitäten zur Lehre innerhalb des Fachbereiches Medizin und darüber hinaus bekannt zu machen.
Methode: Koordination und Organisation des Forums übernimmt eine ärztliche wissenschaftliche Mitarbeiterin. Die Treffen finden in 4-Wochenrhythmen à 2 Stunden statt. Pflichtmitglieder sind die Initiatoren und Leiter der Lehrverbesserungsprojekte; weitere interessierte Akteure des Fachbereiches nehmen ebenfalls teil.
Pro Termin werden maximal zwei Lehrverbesserungsprojekte vorgestellt und diskutiert. In einem Journal Club wird eine aktuelle und für den Fachbereich relevante Studie aus den einschlägigen Journalen der Ausbildungsforschung und Medizindidaktik vorgestellt. Nach jedem Treffen erfolgt eine freiwillige Befragung der Mitglieder hinsichtlich Zielvorstellungen, Veranstaltungsankündigungen und Vortragswünschen. Halbjährig erfolgt ein Bericht an den Studienausschuss. [Ein Organigramm stellt bildhaft die Strukturen dar.]
Ergebnisse: Insgesamt haben bisher bei 9 Terminen 202 Personen teilgenommen. Aus der Befragung der Mitglieder initiierten sich ein interdisziplinäres Promotions- und Studienkolleg für Ausbildungsforschung und ein Lehrverbesserungsprojekt zur zentrumsübergreifenden Koordination von Simulationspatienten in OSCE.
Innerhalb des Forums entstand die Planung zur Präsentation der Lehre-Aktivitäten auf einer Veranstaltung der Frankfurter Medizinischen Gesellschaft. Der Fachbereich verfügt durch Anregung aus dem Gremium inzwischen über ein eigenes Online-Portal, einen virtuellen "Treffpunkt Lehre".
[Teilnehmerzahlen, Herkunftszentren der Teilnehmer, Themen der LV-Projekte über die letzten zwei Jahre]
Schlussfolgerung: Das "Frankfurter Ideenforum für Lehre und Unterricht", FILU, bietet seit seiner Implementierung eine lebendige Austausch- und Kommunikationsplattform für die Leiter der Lehrverbesserungsprojekte am Fachbereich. Über das Forum wird eine gemeinsame Nutzung der vorhandenen Ressourcen in der Lehre möglich. Die interdisziplinäre Zusammenarbeit der Akteure wird maßgeblich gefördert und bietet die Möglichkeit, sinnvolle thematische und personelle Synergien zu finden.
The cell—cell signaling gene CDH13 is associated with a wide spectrum of neuropsychiatric disorders, including attention-deficit/hyperactivity disorder (ADHD), autism, and major depression. CDH13 regulates axonal outgrowth and synapse formation, substantiating its relevance for neurodevelopmental processes. Several studies support the influence of CDH13 on personality traits, behavior, and executive functions. However, evidence for functional effects of common gene variation in the CDH13 gene in humans is sparse. Therefore, we tested for association of a functional intronic CDH13 SNP rs2199430 with ADHD in a sample of 998 adult patients and 884 healthy controls. The Big Five personality traits were assessed by the NEO-PI-R questionnaire. Assuming that altered neural correlates of working memory and cognitive response inhibition show genotype-dependent alterations, task performance and electroencephalographic event-related potentials were measured by n-back and continuous performance (Go/NoGo) tasks. The rs2199430 genotype was not associated with adult ADHD on the categorical diagnosis level. However, rs2199430 was significantly associated with agreeableness, with minor G allele homozygotes scoring lower than A allele carriers. Whereas task performance was not affected by genotype, a significant heterosis effect limited to the ADHD group was identified for the n-back task. Heterozygotes (AG) exhibited significantly higher N200 amplitudes during both the 1-back and 2-back condition in the central electrode position Cz. Consequently, the common genetic variation of CDH13 is associated with personality traits and impacts neural processing during working memory tasks. Thus, CDH13 might contribute to symptomatic core dysfunctions of social and cognitive impairment in ADHD.
Epigenetic signatures such as methylation of the monoamine oxidase A (MAOA) gene have been found to be altered in panic disorder (PD). Hypothesizing temporal plasticity of epigenetic processes as a mechanism of successful fear extinction, the present psychotherapy-epigenetic study for we believe the first time investigated MAOA methylation changes during the course of exposure-based cognitive behavioral therapy (CBT) in PD. MAOA methylation was compared between N=28 female Caucasian PD patients (discovery sample) and N=28 age- and sex-matched healthy controls via direct sequencing of sodium bisulfite-treated DNA extracted from blood cells. MAOA methylation was furthermore analyzed at baseline (T0) and after a 6-week CBT (T1) in the discovery sample parallelized by a waiting time in healthy controls, as well as in an independent sample of female PD patients (N=20). Patients exhibited lower MAOA methylation than healthy controls (P<0.001), and baseline PD severity correlated negatively with MAOA methylation (P=0.01). In the discovery sample, MAOA methylation increased up to the level of healthy controls along with CBT response (number of panic attacks; T0–T1: +3.37±2.17%), while non-responders further decreased in methylation (−2.00±1.28%; P=0.001). In the replication sample, increases in MAOA methylation correlated with agoraphobic symptom reduction after CBT (P=0.02–0.03). The present results support previous evidence for MAOA hypomethylation as a PD risk marker and suggest reversibility of MAOA hypomethylation as a potential epigenetic correlate of response to CBT. The emerging notion of epigenetic signatures as a mechanism of action of psychotherapeutic interventions may promote epigenetic patterns as biomarkers of lasting extinction effects.
Microsurgical free flap reconstruction in acute burn care offers the option of reconstructing even challenging defects in a single stage procedure. Due to altered rheological and hemodynamic conditions in severely burned patients, it bears the risk of a higher complication rate compared to microsurgical reconstruction in other patients. To avoid failure, appropriate indications for free flap reconstruction should be reviewed thoroughly. Several aspects concerning timing of the procedure, individual flap choice, selection and preparation of the recipient vessels, and perioperative measures must be considered. Respecting these specific conditions, a low complication rate, comparable to those seen in microsurgical reconstruction of other traumatic limb defects, can be observed. Hence, the free flap procedure in acute burn care is a relatively safe and reliable tool in the armamentarium of acute burn surgery. In reconstructive burn care, microsurgical tissue transfer is routinely used to treat scar contractures. Due to the more robust perioperative condition of patients, even lower rates of complication are seen in microsurgical reconstruction.
Proton-pumping complex I of the mitochondrial respiratory chain is among the largest and most complex membrane protein complexes. The enzyme contributes substantially to oxidative energy-conversion in eukaryotic cells. Its malfunctions are implicated in many hereditary and degenerative disorders. Here, we report the X-ray structure of mitochondrial complex I at 3.6- 3.9 Å resolution describing in detail the central subunits that execute the bioenergetic function. A continuous axis of basic and acidic residues running centrally through the membrane arm connects the ubiquinone reduction site in the hydrophilic arm to four putative proton-pumping units. The binding position for a substrate analogous inhibitor and blockage of the predicted ubiquinone binding site provide a model for the ‘deactive’ form of the enzyme. The proposed transition into the active form is based on a concerted structural rearrangement at the ubiquinone reduction site rendering support for a two-state stabilization-change mechanism of protonpumping.
Artificial Intelligence (AI) has the potential to greatly improve the delivery of healthcare and other services that advance population health and wellbeing. However, the use of AI in healthcare also brings potential risks that may cause unintended harm. To guide future developments in AI, the High-Level Expert Group on AI set up by the European Commission (EC), recently published ethics guidelines for what it terms “trustworthy” AI. These guidelines are aimed at a variety of stakeholders, especially guiding practitioners toward more ethical and more robust applications of AI. In line with efforts of the EC, AI ethics scholarship focuses increasingly on converting abstract principles into actionable recommendations. However, the interpretation, relevance, and implementation of trustworthy AI depend on the domain and the context in which the AI system is used. The main contribution of this paper is to demonstrate how to use the general AI HLEG trustworthy AI guidelines in practice in the healthcare domain. To this end, we present a best practice of assessing the use of machine learning as a supportive tool to recognize cardiac arrest in emergency calls. The AI system under assessment is currently in use in the city of Copenhagen in Denmark. The assessment is accomplished by an independent team composed of philosophers, policy makers, social scientists, technical, legal, and medical experts. By leveraging an interdisciplinary team, we aim to expose the complex trade-offs and the necessity for such thorough human review when tackling socio-technical applications of AI in healthcare. For the assessment, we use a process to assess trustworthy AI, called 1Z-Inspection® to identify specific challenges and potential ethical trade-offs when we consider AI in practice.
Highlights
• Deletion of SPPL3 promotes resistance of malignant B cells to NK cell cytotoxicity
• Loss of SPPL3 blocks ligand binding to NK receptors via increased N-glycosylation
• B3GNT2 deletion reduces LacNAc addition and restores SPPL3-KO cell sensitivity to NK cells
• SPPL3-deficient cells are enriched in tetra-antennary N-glycans with LacNAc elongations
Summary
Natural killer (NK) cells are primary defenders against cancer precursors, but cancer cells can persist by evading immune surveillance. To investigate the genetic mechanisms underlying this evasion, we perform a genome-wide CRISPR screen using B lymphoblastoid cells. SPPL3, a peptidase that cleaves glycosyltransferases in the Golgi, emerges as a top hit facilitating evasion from NK cytotoxicity. SPPL3-deleted cells accumulate glycosyltransferases and complex N-glycans, disrupting not only binding of ligands to NK receptors but also binding of rituximab, a CD20 antibody approved for treating B cell cancers. Notably, inhibiting N-glycan maturation restores receptor binding and sensitivity to NK cells. A secondary CRISPR screen in SPPL3-deficient cells identifies B3GNT2, a transferase-mediating poly-LacNAc extension, as crucial for resistance. Mass spectrometry confirms enrichment of N-glycans bearing poly-LacNAc upon SPPL3 loss. Collectively, our study shows the essential role of SPPL3 and poly-LacNAc in cancer immune evasion, suggesting a promising target for cancer treatment.
Formalin‐fixed, paraffin‐embedded (FFPE ), biobanked tissue samples offer an invaluable resource for clinical and biomarker research. Here, we developed a pressure cycling technology (PCT )‐SWATH mass spectrometry workflow to analyze FFPE tissue proteomes and applied it to the stratification of prostate cancer (PC a) and diffuse large B‐cell lymphoma (DLBCL ) samples. We show that the proteome patterns of FFPE PC a tissue samples and their analogous fresh‐frozen (FF ) counterparts have a high degree of similarity and we confirmed multiple proteins consistently regulated in PC a tissues in an independent sample cohort. We further demonstrate temporal stability of proteome patterns from FFPE samples that were stored between 1 and 15 years in a biobank and show a high degree of the proteome pattern similarity between two types of histological regions in small FFPE samples, that is, punched tissue biopsies and thin tissue sections of micrometer thickness, despite the existence of a certain degree of biological variations. Applying the method to two independent DLBCL cohorts, we identified myeloperoxidase, a peroxidase enzyme, as a novel prognostic marker. In summary, this study presents a robust proteomic method to analyze bulk and biopsy FFPE tissues and reports the first systematic comparison of proteome maps generated from FFPE and FF samples. Our data demonstrate the practicality and superiority of FFPE over FF samples for proteome in biomarker discovery. Promising biomarker candidates for PC a and DLBCL have been discovered.
Thioredoxin 1 and thioredoxin 2 have opposed regulatory functions on hypoxia-inducible factor-1α
(2007)
Hypoxia inducible factor 1 (HIF-1), a key regulator for adaptation to hypoxia, is composed of HIF-1alpha and HIF-1beta. In this study, we present evidence that overexpression of mitochondria-located thioredoxin 2 (Trx2) attenuated hypoxia-evoked HIF-1alpha accumulation, whereas cytosolic thioredoxin 1 (Trx1) enhanced HIF-1alpha protein amount. Transactivation of HIF-1 is decreased by overexpression of Trx2 but stimulated by Trx1. Inhibition of proteasomal degradation of HIF-1alpha in Trx2-overexpressing cells did not fully restore HIF-1alpha protein levels, while HIF-1alpha accumulation was enhanced in Trx1-overexpressing cells. Reporter assays showed that cap-dependent translation is increased by Trx1 and decreased by Trx2, whereas HIF-1alpha mRNA levels remained unaltered. These data suggest that thioredoxins affect the synthesis of HIF-1alpha. Trx1 facilitated synthesis of HIF-1alpha by activating Akt, p70S6K, and eIF-4E, known to control cap-dependent translation. In contrast, Trx2 attenuated activities of Akt, p70S6K, and eIF-4E and provoked an increase in mitochondrial reactive oxygen species production. MitoQ, a mitochondria specific antioxidant, reversed HIF-1alpha accumulation as well as Akt activation under hypoxia in Trx2 cells, supporting the notion of translation control mechanisms in affecting HIF-1alpha protein accumulation.
Cardiovascular disease (CVD) remains the leading cause of cardiac morbidity and mortality in the entire world population. Heart failure (HF) is the fastest growing cardiac diagnosis, with an annual incidence of 10 cases per 1000 people in individuals older than 65 [1]. This is partly a reflection of an aging population and success of treatment of acute coronary syndromes with reduced premature mortality due to ischaemic heart disease (IHD), as well as increasing ability to recognise non-ischaemic - intrinsic myocardial processes- due to advances in genetics and imaging. The conventional imaging predictors of outcome in CVD patients primarily include left ventricular ejection fraction (LVEF) and late gadolinium enhancement (LGE) using cardiovascular magnetic resonance (CMR). LVEF represents the main universal, as well as the multimodality biomarker of risk stratification. ...
Slack (sequence like a Ca2+ -activated K + channel; also termed Slo2.2, Kcnt1, or KNa 1.1) is a Na+ -activated K + channel that is highly expressed in the peripheral and central nervous system. Previous studies have shown that Slack is enriched in the isolectin B4binding, non-peptidergic subpopulation of C-fiber sensory neurons and that Slack controls the sensory input in neuropathic pain. Recent single-cell RNA-sequencing studies suggested that Slack is highly co-expressed with transient receptor potential (TRP) ankyrin 1 (TRPA1) in sensory neurons. By using in situ hybridization and immunostaining we confirmed that Slack is highly co-localized with TRPA1 in sensory neurons, but only to a minor extent with TRP vanilloid 1. Mice lacking Slack globally or conditionally in sensory neurons (SNS-Slack─/─ ), but not mice lacking Slack conditionally in neurons of the spinal dorsal horn (Lbx1-Slack─/─ ), displayed increased pain behavior after intraplantar injection of the TRPA1 activator allyl isothiocyanate. Patch-clamp recordings with cultured primary neurons and in a HEK-293 cell line transfected with TRPA1 and Slack revealed that Slack-dependent K + currents are modulated in a TRPA1-dependent manner. Taken together, these findings highlight Slack as a modulator of TRPA1-mediated activation of sensory neurons.
Furthermore, we investigated the contribution of Slack in the spinal dorsal horn to pain processing. Lbx1-Slack ─/─ mice demonstrated normal basal pain sensitivity and Complete Freund’s Adjuvant-induced inflammatory pain. Interestingly, we observed a significantly increased spared nerve injury (SNI)-induced neuropathic pain hypersensitivity in Lbx1-Slack ─/─ mutants compared to control littermates. Moreover, we tested the effects of pharmacological Slack activation in the SNI model. Systemic and intrathecal, but not intraplantar administration of the Slack opener loxapine significantly alleviated SNI-induced hypersensitivity in control mice, but only slightly in Lbx1Slack ─/─ mice, further supporting the inhibitory function of Slack in spinal dorsal horn neurons in neuropathic pain processing.
Altogether, our data suggest that Slack in sensory neurons controls TRPA1-induced pain, whereas Slack in spinal dorsal horn neurons inhibits peripheral nerve injury induced neuropathic pain. These data provide further insights into the molecular mechanisms of pain sensation.
Mannan-induced Nos2 in macrophages enhances IL-17–driven psoriatic arthritis by innate lymphocytes
(2018)
Previous identification of the inducible nitric oxide synthase (NOS2) gene as a risk allele for psoriasis (Ps) and psoriatic arthritis (PsA) suggests a possible pathogenic role of nitric oxide (NO). Using a mouse model of mannan-induced Ps and PsA (MIP), where macrophages play a regulatory role by releasing reactive oxygen species (ROS), we found that NO was detectable before disease onset in mice, independent of a functional nicotinamide adenine dinucleotide phosphate oxidase 2 complex. MIP was suppressed by either deletion of Nos2 or inhibition of NO synthases with NG-nitro-L-arginine methyl ester, demonstrating that Nos2-derived NO is pathogenic. NOS2 expression was also up-regulated in lipopolysaccharide- and interferon-γ–stimulated monocyte subsets from patients with PsA compared to healthy controls. Nos2-dependent interleukin-1α (IL-1α) release from skin macrophages was essential for arthritis development by promoting IL-17 production of innate lymphoid cells. We conclude that Nos2-derived NO by tissue macrophages promotes MIP, in contrast to the protective effect by ROS.
Clinical application of transcranial Doppler for detection of cerebral emboli during cardiac surgery
(2010)
Objective: Neurologic injury is one of the most damaging complications for cardiac surgery. How to decrease neurologic impairment by improving perioperative monitoring remains a challenge for both cardiac surgeons and anesthetists. For this reason, transcranial doppler (TCD) has been widely used in cerebral monitoring during cardiac surgery. In this study, two experiments of clinical application of TCD for detection of cerebral emboli during cardiac surgery were to be done. One was “Solid and gaseous cerebral emboli during valvular surgery are significantly reduced with axillary artery cannulation”. The other was “Do intraoperative cerebral embolic signals differ between valvular surgery (VS) and CABG”. Methods: In experiment one, 20 valve and combined procedures with aortic cannulation (AoC group) were compared to 18 procedures with axillary cannulation (AxC group) in a prospective non-randomized study. In experiment two, 18 VS patients and 18 CABG patients were matched by extracorporeal circulation (ECC) time retrospectively. Intraoperative monitoring of both middle cerebral arteries was performed with TCD discriminating between solid and gaseous embolic signals (ES). Results: In experiment one, the AxC group had less solid ES than the AoC group (38±22 vs 55±25, P<0.05), but no significant difference was found in gaseous (501±271 vs 538±333, P>0.05) and total (539 ± 279 vs 593 ± 350, P>0.05) ES. The AxC group had less solid ES during arterial cannulation (2.1±1.5 vs 6.6±3.6, P<0.05) and during aortic cross-clamp time (4.4 ±3.1 vs 10.2 ± 5.1, P<0.05) than the AoC group. During ECC, gaseous ES was not significantly different between groups (398±210 vs 448±291, P>0.05). However, AxC showed less gaseous ES (85±68 vs 187±148, P<0.05) and less gaseous ES per minute (1.8±1.5 vs 4.5±3.2, P<0.05) during weaning off extracorporeal circulation than the AoC group. No significant difference in gaseous ES (313±163 vs 261±189, P>0.05) and gaseous ES per minute (3.1±2.2 vs 2.8±2.2, P>0.05) was found between groups from bypass start to aortic declamping. No neurologic complications occurred. In experiment two, no significant difference was found in solid (38±20 vs 40±26, P>0.05) or gaseous (457±263 vs 412±157, P>0.05) ES between the VS and CABG group during the whole recording time. During ECC, solid ES (20±10 vs 24±19, P>0.05) and gaseous ES (368±230 vs 317±157, P>0.05) were comparable between groups. Specifically, during weaning off ECC, the VS group had more gaseous ES/min (5.6±3.6 vs 3.1±1.2, P<0.05) than the CABG group. But this difference in gaseous ES/min was not significant during the period from bypass start to aortic declamping (2.5±1.8 vs 3.0±1.8, P>0.05). Conclusion: Cerebral embolization does occur during cardiac surgery. Through these two experiments, we demonstrated the feasibility and importance of clinical application of transcranial doppler for detection of cerebral emboli during cardiac surgery. Due to the diversity in clinical application of TCD, it is impossible to compare the number of ES between different research centers. More unified standards should be drawn in order to make wider clinical application possible. Up till now, no robust evidence shows the correlation between intraoperative ES and postoperative neurological impairment. The research on intraoperative ES and postoperative neurological impairment should rely on a complete concept.
Reciprocal t(9;22) ABL/BCR fusion proteins: leukemogenic potential and effects on B cell commitment
(2009)
Background: t(9;22) is a balanced translocation, and the chromosome 22 breakpoints (Philadelphia chromosome – Ph+) determine formation of different fusion genes that are associated with either Ph+ acute lymphatic leukemia (Ph+ ALL) or chronic myeloid leukemia (CML). The "minor" breakpoint in Ph+ ALL encodes p185BCR/ABL from der22 and p96ABL/BCR from der9. The "major" breakpoint in CML encodes p210BCR/ABL and p40ABL/BCR. Herein, we investigated the leukemogenic potential of the der9-associated p96ABL/BCR and p40ABL/BCR fusion proteins and their roles in the lineage commitment of hematopoietic stem cells in comparison to BCR/ABL. Methodology: All t(9;22) derived proteins were retrovirally expressed in murine hematopoietic stem cells (SL cells) and human umbilical cord blood cells (UCBC). Stem cell potential was determined by replating efficiency, colony forming - spleen and competitive repopulating assays. The leukemic potential of the ABL/BCR fusion proteins was assessed by in a transduction/transplantation model. Effects on the lineage commitment and differentiation were investigated by culturing the cells under conditions driving either myeloid or lymphoid commitment. Expression of key factors of the B-cell differentiation and components of the preB-cell receptor were determined by qRT-PCR. Principal Findings: Both p96ABL/BCR and p40ABL/BCR increased proliferation of early progenitors and the short term stem cell capacity of SL-cells and exhibited own leukemogenic potential. Interestingly, BCR/ABL gave origin exclusively to a myeloid phenotype independently from the culture conditions whereas p96ABL/BCR and to a minor extent p40ABL/BCR forced the B-cell commitment of SL-cells and UCBC. Conclusions/Significance: Our here presented data establish the reciprocal ABL/BCR fusion proteins as second oncogenes encoded by the t(9;22) in addition to BCR/ABL and suggest that ABL/BCR contribute to the determination of the leukemic phenotype through their influence on the lineage commitment.
Cisplatin, which induces DNA damage, is standard chemotherapy for advanced bladder cancer (BCa). However, efficacy is limited due to resistance development. Since artesunate (ART), a derivative of artemisinin originating from Traditional Chinese Medicine, has been shown to exhibit anti-tumor activity, and to inhibit DNA damage repair, the impact of artesunate on cisplatin-resistant BCa was evaluated. Cisplatin-sensitive (parental) and cisplatin-resistant BCa cells, RT4, RT112, T24, and TCCSup, were treated with ART (1–100 µM). Cell growth, proliferation, and cell cycle phases were investigated, as were apoptosis, necrosis, ferroptosis, autophagy, metabolic activity, and protein expression. Exposure to ART induced a time- and dose-dependent significant inhibition of tumor cell growth and proliferation of parental and cisplatin-resistant BCa cells. This inhibition was accompanied by a G0/G1 phase arrest and modulation of cell cycle regulating proteins. ART induced apoptos is by enhancing DNA damage, especially in the resistant cells. ART did not induce ferroptosis, but led to a disturbance of mitochondrial respiration and ATP generation. This impairment correlated with autophagy accompanied by a decrease in LC3B-I and an increase in LC3B-II. Since ART significantly inhibits proliferative and metabolic aspects of cisplatin-sensitive and cisplatin-resistant BCa cells, it may hold potential in treating advanced and therapy-resistant BCa.
Background: Compound flaps offer the advantage of one stage defect reconstruction respecting all relevant tissues and early functional recovery by optimal vascularity of all components. Due to its specific vascular anatomy and the three-dimensional donor site, compound flaps with bone components may result in higher complication rates compared to soft tissue compound flaps. The meta-analysis summarizes the available evidence and evaluates whether bone components are a risk factor for periprocedural complications in upper extremity multidimensional defect reconstruction. Method: PubMed and Embase were searched for all publications addressing compound free flaps for upper extremity defect reconstruction with bone or soft tissue components published between January 1988 and May 2018. The methodological quality was assessed with the American Society of Plastic Surgeons Evidence Rating Scale for Therapeutic Studies. Flap loss, thrombosis rate, early infection, hematoma, seroma, as well as donor site complications were extracted and analyzed. Results: Twelve out of 1157 potentially eligible studies (evidence-III) comprising 159 patients were finally included with publication bias for all summarized complication rates. Complication rates for flaps with/ without bone components were: total flap loss 5%, 95% CI = 3%–10% (6%/5%); partial flap loss 8%, 95% CI = 5%–15%, (9%/8%); arterial/venous thrombosis 7%, 95% CI = 4%–12%, (8%/5%)/14%, 95% CI = 9%–21% (16%/6%, P < .05) with higher risk for flaps with bone components; infection 6%, 95% CI = 3%–12% (6%/6%); hematoma 6%, 95% CI = 3%–11% (6%/5%); seroma 5%, 95% CI = 3%–10% (5%/5%); dehiscence 10%, 95% CI = 6%–17% (11%/9%). Conclusion: Compound flaps for upper extremity defect reconstruction including bone components have a higher venous thrombosis rate compared to compound soft-tissue flaps.
Introduction: Esophageal atresia with or without tracheoesophageal fistula (EA/TEF) occurs approximately 1 in 3.500 live births representing the most common malformation of the upper digestive tract. Only half a century ago, EA/TEF was fatal among affected newborns suggesting that the steady birth prevalence might in parts be due to mutational de novo events in genes involved in foregut development.
Methods: To identify mutational de novo events in EA/TEF patients, we surveyed the exome of 30 case-parent trios. Identified and confirmed de novo variants were prioritized using in silico prediction tools. To investigate the embryonic role of genes harboring prioritized de novo variants we performed targeted analysis of mouse transcriptome data of esophageal tissue obtained at the embryonic day (E) E8.5, E12.5, and postnatal.
Results: In total we prioritized 14 novel de novo variants in 14 different genes (APOL2, EEF1D, CHD7, FANCB, GGT6, KIAA0556, NFX1, NPR2, PIGC, SLC5A2, TANC2, TRPS1, UBA3, and ZFHX3) and eight rare de novo variants in eight additional genes (CELSR1, CLP1, GPR133, HPS3, MTA3, PLEC, STAB1, and PPIP5K2). Through personal communication during the project, we identified an additional EA/TEF case-parent trio with a rare de novo variant in ZFHX3. In silico prediction analysis of the identified variants and comparative analysis of mouse transcriptome data of esophageal tissue obtained at E8.5, E12.5, and postnatal prioritized CHD7, TRPS1, and ZFHX3 as EA/TEF candidate genes. Re-sequencing of ZFHX3 in additional 192 EA/TEF patients did not identify further putative EA/TEF-associated variants.
Conclusion: Our study suggests that rare mutational de novo events in genes involved in foregut development contribute to the development of EA/TEF.
Background: The MRI Breast Imaging-Reporting and Data System (BI-RADS) lexicon recommends that a breast MRI proto-col contain T2-weighted and dynamic contrast-enhanced (DCE) MRI sequences. The addition of diffusion-weighted imag-ing (DWI) significantly improves diagnostic accuracy. This study aims to clarify which descriptors from DCE-MRI, DWI, andT2-weighted imaging are most strongly associated with a breast cancer diagnosis.Purpose/Hypothesis: To develop a multiparametric MRI (mpMRI) model for breast cancer diagnosis incorporating Ameri-can College of Radiology (ACR) BI-RADS recommended descriptors for breast MRI with DCE, T2-weighted imaging, andDWI with apparent diffusion coefficient (ADC) mapping.Study Type: Retrospective.Subjects: In all, 188 patients (mean 51.6 years) with 210 breast tumors (136 malignant and 74 benign) who underwentmpMRI from December 2010 to September 2014.Field Strength/Sequence: IR inversion recovert DCE-MRI dynamic contrast-enhanced magnetic resonance imaging VIBEVolume-Interpolated-Breathhold-Examination FLASH turbo fast-low-angle-shot TWIST Time-resolved angiography withstochastic Trajectories.Assessment: Two radiologists in consensus and another radiologist independently evaluated the mpMRI data. Charac-teristics for mass (n = 182) and nonmass (n = 28) lesions were recorded on DCE and T2-weighted imaging accordingto BI-RADS, as well as DWI descriptors. Two separate models were analyzed, using DCE-MRI BI-RADS descriptors, T2-weighted imagines, and ADCmean as either a continuous or binary form using a previously published ADC cutoffvalue of ≤1.25 × 10−3mm2/sec for differentiation between benign and malignant lesions. Histopathology was the stan-dard of reference.Statistical Tests: χ2test, Fisher’s exact test, Kruskal–Wallis test, Pearson correlation coefficient, multivariate logistic regres-sion analysis, Hosmer–Lemeshow test of goodness-of-fit, receiver operating characteristics analysis.Results: In Model 1, ADCmean (P = 0.0031), mass margins with DCE (P = 0.0016), and delayed enhancement with DCE(P = 0.0016) were significantly and independently associated with breast cancer diagnosis; Model 2 identified ADCmean(P = 0.0031), mass margins with DCE (P = 0.0012), initial enhancement (P = 0.0422), and delayed enhancement with DCE(P = 0.0065) to be significantly independently associated with breast cancer diagnosis. T2-weighted imaging variables werenot included in the final models
Poster presentation: 28th Annual Scientific Meeting of the Society for Immunotherapy of Cancer (SITC)
Significant progress has been made over the last decade towards realizing the potential of natural killer (NK) cells for cancer immunotherapy. NK cells can respond rapidly to transformed and stressed cells, and have the intrinsic potential to extravasate and reach their targets in almost all body tissues. In addition to donor-derived primary NK cells, also continuously expanding cytotoxic cell lines such as NK-92 are being considered for adoptive cancer immunotherapy. High cytotoxicity of NK-92 has previously been shown against malignant cells of hematologic origin in preclinical studies, and general safety of infusion of NK-92 cells has been established in phase I clinical trials. To enhance their therapeutic utility, we genetically modified NK-92 cells to express chimeric antigen receptors (CAR) specific for tumor-associated surface antigens. Such CAR were composed of a tumor-specific scFv antibody fragment fused via hinge and transmembrane domains to intracellular signaling moieties such as CD3 zeta chain, or composite fusion molecules also containing a costimulatory protein domain in addition to CD3 zeta. For development towards clinical applications, here a codon-optimized second generation CAR was constructed that consists of an ErbB2-specific scFv antibody domain fused via a linker to a composite CD28-CD3 zeta signaling domain. GMP-compliant protocols for vector production, lentiviral transduction and expansion of a genetically modified NK-92 single cell clone (NK-92/5.28.z) were established. Functional analysis of NK-92/5.28.z cells revealed high and stable CAR expression, selective cytotoxicity against ErbB2-expressing but otherwise NK-resistant tumor cells of different origins in vitro, as well as homing to ErbB2-expressing tumors in vivo. Furthermore, antigen specificity and selective cytotoxicity of these cells were retained in vivo, resulting in antitumoral activity against subcutaneous and intracranial glioblastoma xenografts in NSG mice. Ongoing work now focuses on the development of these cells for adoptive immunotherapy of ErbB2-positive glioblastoma.
Background. Intervertebral disc degeneration (IDD) at the cervicothoracic junction of spine is clinically relevant, however, little attention had been paid. T2 mapping and magnetic transfer ratio (MTR) are useful magnetic resonance imaging (MRI) techniques to quantitatively evaluate IDD, revealing the biochemical changes within the intervertebral disc. To compare T2 mapping with MTR imaging regarding their accuracy to quantitatively diagnose intervertebral disc degeneration at the cervicothoracic junction, influences of anatomical level, gender, age, and Pfrrmann grade of T2 relaxation time values and MTR values were evaluated.
Methods. Sixty-seven patients with neck and upper back pain were included and examined with both T2 mapping andMTR imaging. Te Pfrrmann grade, T2 relaxation time values, and MTR value of each disc between C7 and T3 were measured. Diferences were investigated among diferent segmental levels, genders, age ranges, and Pfrrmann grades. Te diagnostic accuracy of both MRI techniques was compared using the receiver operating characteristic (ROC) curves.
Results. No signifcant diference was detected comparing T2 relaxation time values or MTR values among diferent anatomical levels, genders, and segmental levels. And we generally found that T2 relaxation time values decreased, while MTR value increased with increasing age. Importantly, we demonstrated the signifcant correlation between either T2 relaxation time values or MTR value and Pfrrmann grade.
Conclusion. We proved the better accuracy of T2 mapping over MTR imaging to quantitatively evaluate the intervertebral disc degeneration of the cervicothoracic junction.
Bei der Analyse der Diffusion von Gallensäuren durch Lipiddoppelmembranen (SUV´s, LUVET´s) erweisen sich die lipophilen Gallensäuren als besonders diffusionsfreudig. Zu diesen können die LC, CDC und die DC gezählt werden. Die deutlich hydrophilere und therapeutisch bedeutende UDC permeiert ebenfalls durch Liposomenmembranen, hat jedoch eine geringere Geschwindigkeitskonstante. Konjugierte Gallensäuren zeigen dagegen nur eine minimale Diffusionsrate. Weiterhin wurde nachgewiesen, daß eine deutliche Abhängigkeit der Permeation von der Gallensäurenkonzentration besteht. Mit steigender Konzentration erhöht sich die Geschwindigkeit. Auch bei diesen Experimenten sind die lipophileren Substanzen die schnelleren. Zudem kann festgehalten werden, daß auch eine Temperaturerhöhung bis auf 37 °C und ein Abfall des pH- Wertes auf 5,4 einen positiven Einfluß auf die Permeabilitätsrate von Gallensäuren haben. Umgekehrt verhält es sich bei einer Temperaturminderung auf 10 °C und einer pH- Erhöhung auf 9,4. Eine gleichzeitige pH- Minderung und Temperaturerhöhung hat einen additiven Effekt auf die Diffusion. Geschwindigkeitssteigernd erweist sich auch die Verwendung größerer Liposomen. Eine Steigerung des Liposomendurchmessers geht mit einer Zunahme der Permeabilität einher. Auch die Zugabe von Ethanol bewirkt eine Zunahme der Diffusion durch Liposomenmembranen. Eine herabgesetzte Diffusionsrate kann bei Änderungen in der Lipidkomposition von Lipiddoppelmembranen beobachtet werden. Ein Einbau von Cholesterin führt eine deutliche Minderung der Permeation aller Gallensäuren herbei, wobei die lipophilen Gallensäuren auch weiterhin rascher permeieren. Ein Cholesteringehalt von 20% (w/w) wirkt dabei stärker hemmend als ein Gehalt von 10% (w/w). Im zweiten Abschnitt der vorliegenden Arbeit konzentrieren sich die Beobachtungen auf den Einfluß von Ethanol auf Lipiddoppelmembranen. Es kann gezeigt werden, daß Ethanol einen membrandestabilisierenden Effekt hat, der um so stärker ist, je höher die Ethanolkonzentration gewählt wird. Die DPH- Fluoreszenzversuche lassen zudem erkennen, daß Ethanol zu einer Reduktion der Membranordnung führt und damit zu einer Zunahme der Membranfluidität. Ein Einbau von UDC in die Liposomenmembran hat dagegen einen membran-stabilisierenden Effekt und reduziert die Ethanolwirkung. Dieser Effekt ist zu der Menge der in der Membran eingebauten UDC proportional. Der Cholesterineinbau in die Membran zeigt ähnliche Effekte wie der Einbau von UDC. Die Ergebnisse dieser Arbeit liefern zusätzliche Erklärungen für Phänomene beim therapeutischen Einsatz von Gallensäuren, die bisher nur mangelhaft zu verstehen waren. So kann aus den Diffusionsstudien die Erkenntnis gewonnen werden, daß bei der Diffusion von mehr apolaren Gallensäuren, wie z.B. der CDC, eine leichtere Diffusion durch Membranen möglich ist als für die mehr polaren Moleküle. In der PBC sind vor allem die mehr apolaren Gallensäuren nachweisbar und stellen somit einen vielleicht wichtigen pathophysiologischen Faktor dar, der sich eventuell durch Einbau von Cholesterin in Membranen oder durch Applikation von UDC mindern läßt. UDC scheint jedoch auch gegen andere schädigende Substanzen eine protektive Wirkung zu haben. Ethanolinduzierte Schädigungen an Membranen konnten z.B. durch die Anwendung von UDC deutlich reduziert werden. Eine wenig geschädigte oder sogar intakte Membran kann ihren vielfältigen Funktionen gerecht werden, z.B. die Funktion von Transportsystemen aufrechterhalten. Dies könnte erklären, warum UDC bei primär biliären Leberkrankheiten eine Cholestase vermindert oder sogar aufheben kann, die heute weitgehend mit einer Schädigung membranständiger Carriersysteme erklärt wird.
Hintergrund: Seit mehr als 50 Jahren werden in Deutschland Herzschrittmacher-Implantationen durchgeführt, mittlerweile mit mehr als 100.000 Implantationen pro Jahr. Obwohl es sich um einen gängigen Eingriff handelt, existieren wenig prospektiv randomisierte Studien zu technischen Aspekten der Implantation, insbesondere dem Wundverschluss am Ende der Operation. Ziel der vorliegenden Arbeit war es, an einem Kollektiv von Patienten unerwünschte Ereignisse und kosmetische Ergebnisse, in Abhängigkeit des beim Hautverschluss verwendeten Nahtmaterials (resorbierbarer bzw. nicht-resorbierbarer Faden), miteinander zu vergleichen.
Methoden: In einem Zeitraum von Juli 2018 bis April 2019 wurden Patienten mit geplanter de novo Herzschrittmacher-Implantation ohne Defibrillationstherapie prospektiv in die Studie eingeschlossen und anhand einer Randomisierungliste in zwei Probandengruppen eingeteilt: nicht-resorbierbares Nahtmaterial (Gruppe Prolene®) bzw. resorbierbares Nahtmaterial (Gruppe Monocryl®).
Ein Tag (Beobachtungszeitpunkt 1), sechs Wochen (Beobachtungszeitpunkt 2) und ein Jahr post-OP (Beobachtungszeitpunkt 3) erfolgte die Beurteilung der Narbe bezüglich des kosmetischen Ergebnisses und klinisch relevanter, unerwünschter Ereignisse. Zur kosmetischen Beurteilung diente die Wundbreite in mm, eine auftretende Kelloidbildung und die „Patient and Observer Scar Assessment Scale“ (POSA-Score). Dieser wurde zu Beobachtungszeitpunkt 1 seitens des Patienten auf zwei Fragen (Schmerzhaftigkeit, Juckreiz) reduziert. Die erhobenen klinisch relevanten Parameter waren Nachblutungen, Infektionen, Insuffizienz der Naht und Revisions-OP aufgrund eines Lokalbefundes.
Ergebnisse: Es konnten 114 Patienten in die Studie eingeschlossen werden. Zu Beobachtungszeitpunkt 2 und Beobachtungszeitpunkt 3 belief sich die Anzahl auf jeweils 92 Probanden. Zu allen drei Beobachtungszeitpunkten konnte zwischen beiden Gruppen weder ein signifikanter Unterschied im kosmetischen Ergebnis noch im Auftreten klinisch relevanter Ereignisse festgestellt werden.
Schlussfolgerung: Anhand der vorliegenden Studie scheint das verwendete Nahtmaterial keinen großen Einfluss auf das kosmetische Ergebnis der Narbe, sowie auf das Auftreten von unerwünschten Ereignissen zu haben. Eine multizentrische prospektiv randomisierte Studie mit größerer Patientenanzahl ist notwendig, um die hier erhobenen Daten zu verifizieren.
Obesity is considered as a type of chronic inflammation. It enhances the risk of developing cardiovascular disease, diabetes, and some cancers. The key players in the induction of inflammation in adipose tissue are macrophages. However the mechanism of macrophage activation in obese fat tissue is still not fully understood. Elevated level of saturated fatty acids in adipose tissue promotes inflammation and insulin resistance. Exposure of macrophages to saturated fatty acids stimulates pro-inflammatory c-Jun N-terminal kinase (JNK), nuclear factor kappa B (NF-kB) signaling, and production of pro-inflammatory cytokines, such as IL-6, IL-8, IL-1β, and TNFα. Palmitate is a major saturated free fatty acid released by adipocytes. It activates inflammatory pathways through Toll-like receptors (TLR) 2 and 4, provokes endoplasmic reticulum (ER) stress and increases levels of diacylglycerols (DAGs) and ceramides. Saturated fatty acids also affect cellular oxidative metabolism. Thus, mitochondrial fatty acid oxidation reduces ER-stress and expression of inflammatory cytokines in palmitate-treated macrophages. On the other hand mitochondrial reactive oxygen species (ROS) promote palmitate-mediated pro-inflammatory cytokine production. Recently, mitochondrial functions were linked to their morphology. Mitochondrial fission has been reported in β-cells and myocytes in response to high levels of glucose and free fatty acids, and was associated with disruption of mitochondrial functions, increased ROS level, and cell death. The aim of this study was to investigate the role of mitochondrial fragmentation in palmitate-induced inflammation in human macrophages. In our settings fatty acids, independently of their saturation, affected mitochondrial morphology. Mixtures of long chain saturated and unsaturated fatty acids as well as triglyceride-rich lipoprotein lipolysis products promoted mitochondrial fission. Mitochondrial fragmentation in palmitate-treated macrophages revealed a time- and concentration-dependent character, and was reversible upon palmitate removal. This observation, together with unaltered levels of mitochondrial protein and DNA content, and intact mitochondrial respiration, suggested that mitochondria were not damaged and were functionally active. Mechanistically, palmitate-induced mitochondrial fragmentation was not regulated by ER stress or loss of mitochondrial membrane potential. However, inhibition of palmitate incorporation into mitochondrial membrane phospholipids decreased mitochondrial fragmentation. Other approach to prevent mitochondrial fission was the inhibition of dynamin-related protein 1 (DRP1) activity, which drives mitochondrial fission by forming ring- like structures around mitochondria and constricting mitochondrial membranes. Palmitate altered mitochondrial membrane lipid composition and promoted DRP1-oligomerization. The inhibition of palmitate-induced mitochondrial fragmentation enhanced mitochondrial ROS production, c-Jun phosphorylation, and upregulated expression of pro-inflammatory cytokines. Taken together, these results suggest that mitochondrial fragmentation is a protective mechanism attenuating palmitate-induced inflammatory responses. Future experiments will be required to investigate the role of mitochondrial fragmentation in obesity-associated diseases in vivo.
Forewarned is forearmed
(2009)
Simple Summary: Treatment of metastatic renal cell carcinoma (mRCC) remains a challenge due to the lack of biomarkers indicating the optimal drug for each patient. This study analyzed blood samples of patients with predominant clear cell mRCC who were treated with the mTOR inhibitor everolimus after failure of one prior tumor therapy. In an exploratory approach, predictive blood biomarkers were searched. We found lower levels of the protein thrombospondin-2 (TSP-2) at the start of the therapy and higher lactate dehydrogenase (LDH) levels in serum two weeks after therapy initiation to be associated with therapy response. Of note, these blood biomarkers had a higher predictive value than baseline patient parameters or risk classifications. Polymorphisms in the mTOR gene appeared to be associated with therapy response, but were not significant. To conclude, it seems feasible to identify patients showing longtime responses to everolimus and possible to increase tumor therapy response rates based on biomarkers for individual therapy selection.
Abstract: There is an unmet need for predictive biomarkers in metastatic renal cell carcinoma (mRCC) therapy. The phase IV MARC-2 trial searched for predictive blood biomarkers in patients with predominant clear cell mRCC who benefit from second-line treatment with everolimus. In an exploratory approach, potential biomarkers were assessed employing proteomics, ELISA, and polymorphism analyses. Lower levels of angiogenesis-related protein thrombospondin-2 (TSP-2) at baseline (≤665 parts per billion, ppb) identified therapy responders with longer median progression-free survival (PFS; ≤665 ppb at baseline: 6.9 months vs. 1.8, p = 0.005). Responders had higher lactate dehydrogenase (LDH) levels in serum two weeks after therapy initiation (>27.14 nmol/L), associated with a longer median PFS (3.8 months vs. 2.2, p = 0.013) and improved overall survival (OS; 31.0 months vs. 14.0 months, p < 0.001). Baseline TSP-2 levels had a stronger relation to PFS (HR 0.36, p = 0.008) than baseline patient parameters, including IMDC score. Increased serum LDH levels two weeks after therapy initiation were the best predictor for OS (HR 0.21, p < 0.001). mTOR polymorphisms appeared to be associated with therapy response but were not significant. Hence, we identified TSP-2 and LDH as promising predictive biomarkers for therapy response on everolimus after failure of one VEGF-targeted therapy in patients with clear cell mRCC.