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Institute
- Medizin (2648) (remove)
Aims: In primary central nervous system tumours, epithelial-to-mesenchymal transition (EMT) gene expression is associated with increased malignancy. However, it has also been shown that EMT factors in gliomas are almost exclusively expressed by glioma vessel-associated pericytes (GA-Peris). In this study, we aimed to identify the mechanism of EMT in GA-Peris and its impact on angiogenic processes.
Methods; In glioma patients, vascular density and the expression of the pericytic markers platelet derived growth factor receptor (PDGFR)-β and smooth muscle actin (αSMA) were examined in relation to the expression of the EMT transcription factor SLUG and were correlated with survival of patients with glioblastoma (GBM). Functional mechanisms of SLUG regulation and the effects on primary human brain vascular pericytes (HBVP) were studied in vitro by measuring proliferation, cell motility and growth characteristics.
Results: The number of PDGFR-β- and αSMA-positive pericytes did not change with increased malignancy nor showed an association with the survival of GBM patients. However, SLUG-expressing pericytes displayed considerable morphological changes in GBM-associated vessels, and TGF-β induced SLUG upregulation led to enhanced proliferation, motility and altered growth patterns in HBVP. Downregulation of SLUG or addition of a TGF-β antagonising antibody abolished these effects.
Conclusions: We provide evidence that in GA-Peris, elevated SLUG expression is mediated by TGF-β, a cytokine secreted by most glioma cells, indicating that the latter actively modulate neovascularisation not only by modulating endothelial cells, but also by influencing pericytes. This process might be responsible for the formation of an unstructured tumour vasculature as well as for the breakdown of the blood–brain barrier in GBM.
Sex differences in psychiatric comorbidity and clinical presentation in youths with conduct disorder
(2021)
Background: Conduct disorder (CD) rarely occurs alone but is typically accompanied by comorbid psychiatric disorders, which complicates the clinical presentation and treatment of affected youths. The aim of this study was to investigate sex differences in comorbidity pattern in CD and to systematically explore the ‘gender paradox’ and ‘delayed-onset pathway’ hypotheses of female CD.
Methods: As part of the FemNAT-CD multisite study, semistructured clinical interviews and rating scales were used to perform a comprehensive phenotypic characterization of 454 girls and 295 boys with CD (9–18 years), compared to 864 sex- and age-matched typically developing controls.
Results: Girls with CD exhibited higher rates of current major depression, anxiety disorders, post-traumatic stress disorder and borderline personality disorder, whereas boys with CD had higher rates of current attention-deficit/hyperactivity disorder. In line with the ‘gender paradox’ hypothesis, relative to boys, girls with CD showed significantly more lifetime psychiatric comorbidities (incl. Alcohol Use Disorder), which were accompanied by more severe CD symptoms. Female and male youths with CD also differed significantly in their CD symptom profiles and distribution of age-of-onset subtypes of CD (i.e. fewer girls with childhood-onset CD). In line with the ‘delayed-onset pathway’ hypothesis, girls with adolescent-onset CD showed similar levels of dimensional psychopathology like boys with childhood-onset CD, while boys with adolescent-onset CD had the lowest levels of internalizing psychopathology.
Conclusions: Within the largest study of CD in girls performed to date, we found compelling evidence for sex differences in comorbidity patterns and clinical presentation of CD. Our findings further support aspects of the ‘gender paradox’ and ‘delayed-onset pathway’ hypotheses by showing that girls with CD had higher rates of comorbid lifetime mental disorders and functional impairments, and they usually developed CD during adolescence. These novel data on sex-specific clinical profiles of CD will be critical in informing intervention and prevention programmes.
Aims: Somatic mutations in haematopoietic stem cells can lead to the clonal expansion of mutated blood cells, known as clonal haematopoiesis (CH). Mutations in the most prevalent driver genes DNMT3A and TET2 with a variant allele frequency (VAF) ≥ 2% have been associated with atherosclerosis and chronic heart failure of ischemic origin (CHF). However, the effects of mutations in other driver genes for CH with low VAF (<2%) on CHF are still unknown.
Methods and results: Therefore, we analysed mononuclear bone marrow and blood cells from 399 CHF patients by deep error-corrected targeted sequencing of 56 genes and associated mutations with the long-term mortality in these patients (3.95 years median follow-up). We detected 1113 mutations with a VAF ≥ 0.5% in 347 of 399 patients, and only 13% had no detectable CH. Despite a high prevalence of mutations in the most frequently mutated genes DNMT3A (165 patients) and TET2 (107 patients), mutations in CBL, CEBPA, EZH2, GNB1, PHF6, SMC1A, and SRSF2 were associated with increased death compared with the average death rate of all patients. To avoid confounding effects, we excluded patients with DNMT3A-related, TET2-related, and other clonal haematopoiesis of indeterminate potential (CHIP)-related mutations with a VAF ≥ 2% for further analyses. Kaplan–Meier survival analyses revealed a significantly higher mortality in patients with mutations in either of the seven genes (53 patients), combined as the CH-risk gene set for CHF. Baseline patient characteristics showed no significant differences in any parameter including patient age, confounding diseases, severity of CHF, or blood cell parameters except for a reduced number of platelets in patients with mutations in the risk gene set in comparison with patients without. However, carrying a mutation in any of the risk genes remained significant after multivariate cox regression analysis (hazard ratio, 3.1; 95% confidence interval, 1.8–5.4; P < 0.001), whereas platelet numbers did not.
Conclusions: Somatic mutations with low VAF in a distinct set of genes, namely, in CBL, CEBPA, EZH2, GNB1, PHF6, SMC1A, and SRSF2, are significantly associated with mortality in CHF, independently of the most prevalent CHIP-mutations in DNMT3A and TET2. Mutations in these genes are prevalent in young CHF patients and comprise an independent risk factor for the outcome of CHF, potentially providing a novel tool for risk assessment in CHF.
Ein professioneller Orchestermusiker verbringt die meiste Zeit in körperlich ungünstiger Sitzhaltung beim Spielen. Die Folge ist ein Anstieg des Risikos für die Entwicklung von muskuloskelettalen Beschwerden [44, 127, 128]. Eine Verbesserung der Arbeitsbedingungen lässt sich u.a. durch den Einsatz von ergonomischen Stühlen erzielen, da sie einen Einfluss auf die Körperhaltung des Orchestermusikers besitzen. Im Mittelpunkt der vorliegenden Arbeit standen daher sechs unterschiedliche von der Firma Mey für Orchestermusiker konzipierte Stühle. Die Studie beinhaltete eine Untersuchung des Einflusses der Stühle auf die Oberkörperstatik und die Sitzdruckverteilung von Orchestermusikern und den Einfluss auf ihr Instrumentalspiel im Vergleich zur habituellen Sitzhaltung. Das Probandenkollektiv umfasste 24 Berufsmusiker des Polizeiorchesters Mainz (Rheinland-Pfalz, Deutschland) und bestand zum größten Teil aus Blasinstrumentalisten (3 Frauen, 21 Männer). Das Durchschnittsalter betrug 45 Jahre. Die Überprüfung der Oberkörperstatik erfolgte durch einen 3D-Rückenscanner (ABW GmbH, Frickenhausen, Deutschland), eine Evaluation der Druckverhältnisse im Gesäß durch eine Druckmessmatte (GeBioM GmbH, Münster, Deutschland), womit sich bei jedem Stuhl ein bestimmtes Druckmuster kennzeichnen ließ. Die Messung erfolgte pro Stuhl und Messgerät stets im Wechsel zwischen der statischen Position ohne Instrument (oI) und der statischen Position mit Instrument (mI). Bei der statistischen Auswertung kam es zur Verwendung nicht parametrischer Tests (Friedman-, Wilcoxon Matched- Pairs-Test), wobei das Signifikanzniveau bei ≤0,05 lag. Es erfolgte eine Unterteilung in einen Inter- und einen Intrastuhlvergleich.
Die Ergebnisse des Interstuhlvergleichs zeigten bezüglich der Schulterregion keine signifikanten Veränderungen, wohingegen im Hinblick auf die WS-Parameter Signifikanzen zwischen Stuhl 2 und 5 verzeichnet wurden: in der habituellen Position offenbarte die Rumpflänge D die größte Abweichung mit einem Längenunterschied von 14mm (p≤0,001), so auch die Rumpflänge S (16 mm; p≤0,001). Bezüglich dieser Stühle wiesen die restlichen WS-Parameter Abweichungen von max. 4° bzw. 3mm auf. Zwischen Stuhl 2 und 3 ergaben sich m.I. im Hinblick auf den thorakalen (p≤0,01) und lumbalen Biegungswinkel (p≤0,001) max. Diskrepanzen von 2,5°. Die größten Unterschiede in der Beckenregion zeigten sich beim Beckenabstand zwischen Stuhl 3 und 5 o.I. (7mm) und m.I. (4mm), (beide Bedingungen p≤0,001). Im Hinblick auf die Druckparameter fand sich eine Abhängigkeit zwischen belasteter Fläche und Sitzbeinhöckerdruck (SBH): eine kleine Fläche bedeutete eine schlechte Druckverteilung und umgekehrt. Stühle 1 und 4 besaßen den geringsten SBH (p≤0,001). Im Intrastuhlvergleich zeigten die Bereiche der WS, Schultern und Becken jeweils mindestens einen signifikanten Parameter auf, wie z.B. Schulterblattabstand, sagittale Rumpfneigung und Beckenabstand. Korrelationen zwischen den Parametern waren nicht zu erkennen. M.I. kommt es hinsichtlich des SBH auf der linken Hälfte im Schnitt auf allen Stühlen zu einer Druckerhöhung von 8,46%, auf der rechten zu einer von 11,11%. Im Hinblick auf den Oberschenkeldruck (OS) vollzieht sich die größte Veränderung (7,4bar) der rechten Gesäßhälfte auf Stuhl 2 mit p≤0,001. Der Interstuhlvergleich zeigt also, dass die Wahl eines Stuhls keine Auswirkung auf die Körperhaltung hat. Ursache für Diskrepanzen hinsichtlich des SBH ist die unterschiedliche Polsterung und Größe der Sitzfläche, welche eine hohe Relevanz in Bezug auf die Umverteilung des Drucks und den subjektiven Komfort besitzt. Eine gepolsterte und große Oberfläche ist gleichzusetzen mit einer günstigen Druckverteilung und einem angenehmen individuellen Sitzgefühl. Der Intrastuhlvergleich offenbart ebenfalls keine klinisch relevanten Veränderungen im Oberkörper. Ausschließlich in der Druckverteilung ist eine signifikante Variabilität hinsichtlich des OS rechts bei Stuhl 2 vorhanden (p≤0,001). Die Sitzposition der Probanden ist symmetrisch. Die Symmetrie bezieht sich sowohl auf den Schulter-, WS- und Beckenbereich, als auch auf die Druckverhältnisse im Gesäßbereich.
In der vorliegenden Studie konnte belegt werden, dass gepolsterte und breite Sitzoberflächen mit gleichmäßiger Druckverteilung und gleichzeitig hohem Komfort einhergehen. Im Hinblick auf das Musizieren über einen längeren Zeitraum ist das Vorhandensein eines hohen Komforts für den Orchestermusiker von Bedeutung. Diese Erkenntnisse sind bei der Weiterentwicklung von ergonomischen Stühlen zu berücksichtigen. Eine Analyse der Schulter- und Rumpfmuskulatur und Messung des Beckenwinkels ist in weiteren Studien zusätzlich erforderlich, um zu erforschen, inwieweit die Stühle die Fehlfunktionen des Bewegungsapparates beeinflussen.
Die Therapie langstreckiger Knochendefekte stellt auch weiterhin eine große Herausforderung dar. Dies beruht unter anderem darauf, dass der therapeutische Goldstandard - die Verwendung von autogener Knochensubstanz aus dem Beckenkamm - neben der begrenzten Verfügbarkeit vor allem Komplikationen im Bereich der Entnahmestelle mit sich bringen kann. Es wurde bisher aber noch kein durchschlagendes Ergebnis in der Entwicklung neuer Scaffolds zum Einsatz bei langstreckigen Knochendefekten erreicht. Dies kann eine Vielzahl an Ursachen haben, die sich von der verwendeten Ausgangssubstanz, bis hin zum verwendeten Design erstrecken können. Neben dem Ausgangsmaterial spielen vor
allem die Formgebung und physikalische Eigenschaften, wie Porosität und Mikroarchitektur, eine wichtige Rolle.
Ein aktueller Ansatz zur Nutzung als alternatives Knochenersatzmaterial ist das Knochen-Tissue-Engineering. Hierbei werden körpereigene, knochen-regenerative Zellen mit einem dreidimensionalen Gerüststoff (Knochenersatzmaterial oder -scaffold) kombiniert und in den Knochendefekt implantiert. In dieser Arbeit wurde der Fokus auf die Designentwicklung eines neuen Kochenersatz-Scaffolds gelegt. Nach Vorbild schon vorgestellter Knochenersatzdesigns und unter Berücksichtigung einer Grundstruktur, die auch Phasen der Knochenheilung wie die Frakturhämatomausbreitung und initiale Nährstoffversorgung einbeziehen sollte, wurden mehrere Designs (Raster, Tempel, Zwiebel) entwickelt. Mithilfe des additiv extrusionsbasierten Schmelzschichtverfahrens (Fused Filament Fabrication) wurden die in Computer-Aided Design entworfenen Scaffolds realisiert.
Dieser Ansatz beinhaltet, unter Verwendung des resorbierbaren und biokompatiblen Trägerpolymers Polylaktat, mehrstufige Designs, die kleine biologisch funktionelle Einheiten in eine tragende, kompressionsfeste Rahmenstruktur einbetten. Hierdurch entsteht einerseits die nötige mechanische Belastbarkeit und andererseits eine offene Architektur mit Poren, die Diffusion von Sauerstoff und
Nährstoffen in die inneren Bereiche des Implantats ermöglicht. Es wurden verschiedene Designs entwickelt, gedruckt und mechanisch sowie in vitro in den Kernbereichen Zelladhäsion, Zellaktivität und osteogene Differenzierung nach Besiedelung mit Saos-2-Zellen charakterisiert.
Ein weiterer Entwicklungsschritt stellte das Einführen eines neuartigen, innerhalb der Designs kompatiblen Baukastensystems dar. Hierdurch wird nicht nur die Anpassbarkeit an den Knochendefekt verbessert, es sind auch weitere Funktionen ergänzbar und die unterschiedlichen Designs untereinander kombinierbar.
Die Ergebnisse dieser Dissertationsarbeit dienen als Basis für einen völlig neuen Ansatz von Knochenersatzmaterialien mit positiven biologischen sowie biophysikalischen Eigenschaften.
Background & Aims: HBV genotype G (HBV/G) is mainly found in co-infections with other HBV genotypes and was identified as an independent risk factor for liver fibrosis. This study aimed to analyse the prevalence of HBV/G co-infections in healthy European HBV carriers and to characterize the crosstalk of HBV/G with other genotypes.
Methods: A total of 560 European HBV carriers were tested via HBV/G-specific PCR for HBV/G co-infections. Quasispecies distribution was analysed via deep sequencing, and the clinical phenotype was characterized regarding qHBsAg-/HBV-DNA levels and frequent mutations. Replicative capacity and expression of HBsAg/core was studied in hepatoma cells co-expressing HBV/G with either HBV/A, HBV/D or HBV/E using bicistronic vectors.
Results: Although no HBV/G co-infection was found by routine genotyping PCR, HBV/G was detected by specific PCR in 4%-8% of patients infected with either HBV/A or HBV/E but only infrequently in other genotypes. In contrast to HBV/E, HBV/G was found as the quasispecies major variant in co-infections with HBV/A. No differences in the clinical phenotype were observed for HBV/G co-infections. In vitro RNA and DNA levels were comparable among all genotypes, but expression and release of HBsAg was reduced in co-expression of HBV/G with HBV/E. In co-expression with HBV/A and HBV/E expression of HBV/G-specific core was enhanced while core expression from the corresponding genotype was markedly diminished.
Conclusions: HBV/G co-infections are common in European inactive carriers with HBV/A and HBV/E infection, but sufficient detection depends strongly on the assay. HBV/G regulated core expression might play a critical role for survival of HBV/G in co-infections.
Background: A link between attention-deficit/hyperactivity disorder (ADHD) and alcohol use disorder (AUD) has been widely demonstrated. In this study, we used neuroimaging to investigate the connectivity traits that may contribute to the comorbidity of these disorders.
Methods: The study included an AUD group (N = 18), an ADHD group (N = 17), a group with AUD + ADHD comorbidity (N = 12) and a control group (N = 18). We used resting-state functional connectivity in a seed-based approach in the default mode networks, the dorsal attention network, and the salience network.
Results: Within the default mode networks, all affected groups shared greater connectivity toward the temporal gyrus when compared to the control group. Regarding the dorsal attention network, the Brodmann area 6 presented greater connectivity for each affected group in comparison with the control group, displaying the strongest aberrations in the AUD + ADHD group. In the salience network, the prefrontal cortex showed decreased connectivity in each affected group compared to the control group.
Conclusions: Despite the small and unequal sample sizes, our findings show evidence of common neurobiological alterations in AUD and ADHD, supporting the hypothesis that ADHD could be a risk factor for the development of AUD. The results highlight the importance of an early ADHD diagnosis and treatment to reduce the risk of a subsequent AUD.
Verletzungen der Fingerkuppen stellen einen häufigen Grund für die Vorstellung in der Notaufnahme dar. Während viele Verletzungen konservativ behandelt werden können, benötigen einige Patienten eine operative Versorgung. Dabei kommen verschiedene operative Verfahren zur Anwendung, darunter eine Fingerkuppenrekonstruktion mit einer neurovaskulären Insel-Lappenplastik.
Ziel der neurovaskulären Insel-Lappenplastik ist die Wiederherstellung einer taktil sensiblen und wieder belastungsfähigen Fingerkuppe ohne ein Längendefizit des Fingers.
In der vorliegenden Studie wurden Langzeit-Behandlungsergebnisse mit einer mittleren Nachuntersuchungsdauer von 105 Monaten bei 28 Patienten mit 29 durch neurovaskuläre Insel-Lappenplastiken rekonstruierten Fingerkuppen in der Berufsgenossenschaftlichen Unfallklinik Frankfurt am Main erfasst. Die untersuchten Patienten hatten zum Zeitpunkt der Verletzung ein Durchschnittsalter von 38,4 Jahren. Es handelte sich überwiegend um männliche und berufstätige Patienten.
Es wurden nur Fingerkuppenverletzungen mit freiliegenden Knochen (Allen-Klassifikation Zone III und IV) operativ versorgt. In unserer Studie traten am häufigsten die Verletzungen am Mittelfinger, Zeigefinger und Ringfinger auf. Die Mehrheit der Fingerkuppenverletzungen geschah in Folge eines Arbeitsunfalls, die Arbeitsunfähigkeitsdauer betrug ca. 6,1 Wochen. Die maximale Größe eines neurovaskulären Insel-Lappen lag bei 6 x 3,5 cm.
Alle Patienten waren mit den Behandlungsergebnissen anhand der numerischen Rating-Skala und des DASH Fragebogens bezüglich Funktionalität sowie dem ästhetischen Outcome zufrieden und würden sich wieder operieren lassen.
Die Sensibilität konnte anhand der Zwei-Punkte-Diskrimination sowie Semmes-Weinstein Monofilament-Testes als gut bewertet werden und normale physiologische Werte erreichen. Die Narbe war überwiegend weich und in der Mehrheit der Fälle entsprach sie anhand der Vancouver Scar Scale Werte annähend der normalen Haut. Zwei Drittel der Patienten gaben keine Schmerzen in Ruhe an. Die Hälfte der Patienten gaben Schmerzen unter Belastung anhand der numerischen Rating-Scala an.
Trotz der hohen Anzahl von Krallennagelbildungen in 56,5 % und einer Differenz der Nagellänge bzw. Form waren alle Patienten mit dem Erhalt des Nagels zufrieden und haben dies subjektiv nicht als störend empfunden.
Als besonders beeinträchtigend wurde eine Kälteempfindlichkeit von 48,3 % Patienten beschrieben.
Der Mittelwert der Fingerkraft im Schlüsselgriff mit Hilfe des Pinch-Gauge zwischen Daumen und den vier Fingerspitzen im Wechsel wurde bei fast allen Messungen an den gesunden Fingern gering größer gemessen ohne eine statistisch signifikante Differenz. Die Messung der Handkraft mittels Jamar-Dynamometer ergab ein Defizit von 8,8 % (Vergleich betroffene zur gesunden Hand).
Bei drei von 24 Patienten hat sich eine Beugekontraktur im Interphalangealgelenk von 5°, 15°, 20° und bei einem von 22 Patienten im distalen Interphalangealgelenk von 10° gebildet. Zum Nachuntersuchungszeitpunkt wurden durch die Untersucherin ein Hoffmann-Tinel- Zeichen in 24,1 % und Druckschmerz in 17,2 % im Bereich der verletzten Fingerkuppe festgestellt. Subjektiv empfand kein Patient diese Symptome als störend und alle berufstätigen Patienten konnten ihre vor dem Unfall ausgeübte Tätigkeit wieder aufnehmen. Diese Studie konnte belegen, dass die Defektdeckung der Fingerkuppenverletzungen mit Hilfe von neurovaskulären Insel-Lappenplastiken ein sehr gutes ästhetisches und funktionelles Ergebnis mit einer fast identischen Hautqualität erzielt. Mit dieser Methode konnte eine Wiederherstellung des Weichteilgewebes der sensiblen Fingerkuppe auch bei großflächigen Defekten der Fingerkuppe erreicht werden. Die subjektive Patientenzufriedenheit mit dieser Rekonstruktionsmethode ist hoch.
Fokale idiopathische Dystonien stellen die häufigste Dystonieform im Erwachse-nenalter dar. Die Pathophysiologie dieser Erkrankungsgruppe ist weitestgehend unverstanden, wobei die Basalganglien, der Thalamus und das Cerebellum eine zentrale Rolle in der Genese dystoner Bewegungen zu spielen scheinen. Unklar ist, ob Patienten mit fokaler idiopathischer Dystonie mikrostrukturelle Verände-rungen in den oben genannten Arealen aufweisen, die das Störungsbild bedingen könnten.
In dieser Arbeit wurde mittels Methoden der quantitativen Magnetresonanztomographie (qMRT) der Versuch unternommen, Änderungen von Struktur und Eigenschaften des Hirngewebes bei idiopathischen Dystonien im Vergleich zu einer gesunden Kontrollkohorte zu identifizieren. Vorangegangen bildgebende Studien erbrachten bislang widersprüchliche Ergebnisse. Insbesondere der Frage nach möglichen Veränderungen des Eisengehaltes sollte mittels Messung der T2*-Re-laxationszeit nachgegangen werden. Weiterhin wurden Areale der motorischen Kontrolle (Basalganglien, Thalamus, Cerebellum und zerebraler Kortex) auf mög-liche Volumenveränderungen untersucht.
Insgesamt wurden 30 Patienten mit fokaler idiopathischer Dystonie sowie 30 alters- und geschlechtsgematchte Kontrollprobanden mittels multimodaler qMRT untersucht und Parameterkarten für die T1- und T2/T2*-Relaxationszeiten sowie der Protonendichte berechnet. Die Parameterkarten wurden sowohl voxelweise als auch regionenbasiert mit der Frage nach Dystonie-spezifischen Veränderungen statistisch ausgewertet. Zusätzlich erfolgte eine Subgruppenanalyse der ge-nannten Parameter von 17 Patienten mit zervikaler Dystonie im Vergleich zu ei-ner verkleinerten Kontrollgruppe.
Für keinen der untersuchten qMRT-Parameter konnte in der voxelweisen oder der regionenbasierten Analyse signifikante Gruppenunterschiede zwischen Patienten mit fokaler idiopathischer Dystonie und gesunden Kontrollprobanden nachgewiesen werden (p ≥ 0,05). Auch unterschieden sich die untersuchten Hirnregionen nicht hinsichtlich ihres Volumens (p ≥ 0,31). Ebenfalls ausschließlich negative Ergebnisse ergab die Subgruppenanalyse für Patienten mit zervikaler Dystonie (Gewebeparameter p ≥ 0,05, Volumen p ≥ 0,21).
Somit fanden sich entgegen der ursprünglichen Hypothese keine mittels qMRT detektierbaren krankheitsspezifischen mikrostrukturellen Gewebeveränderungen bei Patienten mit fokaler idiopathischer Dystonie. Unter Berücksichtigung der me-thodischen Limitationen und der kleinen Fallzahl ergaben sich keine Hinweise auf Dystonie-assoziierte neurodegenerative Prozesse, erhöhte Eisenablagerungen, Demyelinisierung oder Veränderungen des Wassergehaltes. Die Ergebnisse dieser Studie sind kompatibel mit der Sichtweise, dass idiopathische Dystonien am ehesten aufgrund einer reinen neurofunktionellen Netzwerkstörung der Ba-salganglien und deren kortikalen sowie cerebellären Projektionsareale entstehen. Hierbei ist zu berücksichtigen, dass sehr kleine, feingewebliche Veränderungen, die unterhalb des Auflösungsvermögens der hier verwendeten Bildge-bungsmethode liegen, nicht sicher ausgeschlossen werden können. Weitere quantitativ histologische Untersuchungen in Kombination mit quantitativ bildgebenden Verfahren werden benötigt, um die Pathophysiologie dieser Erkrankungsgruppe besser verstehen zu können.
Many proteins have been found to operate in a complex with various biomolecules such as proteins, nucleic acids, carbohydrates, or lipids. Protein complexes can be transient, stable or dynamic and their association is controlled under variable cellular conditions. Complexome profiling is a recently developed mass spectrometry-based method that combines mild separation techniques, native gel electrophoresis, and density gradient centrifugation with quantitative mass spectrometry to generate inventories of protein assemblies within a cell or subcellular fraction. This review summarizes applications of complexome profiling with respect to assembly ranging from single subunits to large macromolecular complexes, as well as their stability, and remodeling in health and disease.
It is well known that lifestyle changes can alter several physiological functions in the human body. For exercise and diet, these effects are used sensibly in basic therapies, as in cardiovascular diseases. However, the physiological changes induced by exercise and a modified diet also have the capacity to influence the efficacy and toxicity of several drugs, mainly by affecting different pharmacokinetic mechanisms. This pharmacological plasticity is not clinically relevant in all cases but might play an important role in altering the effects of very common drugs, particularly drugs with a narrow therapeutic window. Therefore, with this review, we provide insights into possible food–drug and exercise–drug interactions to sharpen awareness of the potential occurrence of such effects.
Background: Estimating prognosis of periodontally affected teeth at the beginning of supportive periodontal care (SPC) is an important component for further treatment planning. This study aimed to evaluate tooth loss (TL) during 10 years of SPC in periodontally compromised patients and to identify tooth-related factors affecting TL.
Methods: Patients were re-examined 120 ± 12 months after accomplishment of active periodontal therapy. TL was defined as primary outcome variable and tooth-related factors (abutment status, furcation involvement [FI], tooth mobility, mean periodontal probing depth [PD], and clinical attachment level [CAL] at beginning of SPC, and initial bone loss [BL]) were estimated based on an adjusted regression analyses model.
Results: Ninety-seven patients (51 females and 46 males; mean age, 65.3 ± 11 years) lost 119 of 2,323 teeth (overall TL [OTL]: 0.12 teeth/patient/y) during 10 years of SPC. Forty of these teeth (33.6%) were lost for periodontal reasons (TLP; 0.04 teeth/patient/y). Significantly more teeth were lost due to other reasons (P <0.0001). TLP (OTL) only occurred in 5.9% (14.7%) of all teeth, when BL was at least 80%. Use as abutment tooth, FI degree III, tooth mobility degrees I and II, mean PD, and CAL positively correlated with OTL (P <0.05). For TLP, FI and tooth mobility degree III as well as mean CAL were identified as tooth-related prognostic factors (P <0.05).
Conclusions: During 10 years of SPC, most of the teeth (93.4%) of periodontally compromised patients were retained, showing the positive effect of a well-established treatment concept. Well-known tooth-related prognostic factors were confirmed.
The prevalence of peri-implant diseases around subcrestally placed implants: a cross-sectional study
(2021)
Objectives: To evaluate the prevalence of peri-implant health, peri-implant mucositis or periimplantitis for subcrestally placed implants (1–3 mm) on the short-, medium- and long term.
Material and Methods: Two hundred patients were enrolled in this cross-sectional study that were treated and screened during regular maintenance visits at one university center. A total of 657 implants were evaluated. Peri-implant health and diseases were assessed according to predefined case definitions. Binary logistic regression was used to assess the correlation with local and systemic factors.
Results: After a median function time of 9.36 ± 6.44 years (range: 1–26 years), the prevalence of peri-implant mucositis and peri-implantitis was 66.5% and 15.0%, at the patient level, corresponding to 62.6% and 7.5%, at the implant level, respectively. Peri-implantitis was significantly associated with patients’ history of periodontitis (odds ratio, OR 5.33).
Conclusion: Peri-implant diseases were a common finding around subcrestally placed implants.
Over the past years, next-generation sequencing (NGS) technologies revolutionized the possibilities in a broad range of application areas. Also in the field of forensic genetics, NGS continuously gained in importance and attentiveness. A significant number of sudden cardiac deaths (SCD) in the young is due to heritable arrhythmia syndromes emphasizing the need of examining the genetic basis in these cases also with regard to the identification of relatives and/or patients being at risk. As a result, high-throughput methods became of increasing value in molecular autopsy investigations enabling the analysis of a broad spectrum of genes.
Most standard protocols are optimized for high-quality samples and frequently not directly applicable to challenging forensic sample material. In the present study, we intended to examine a comprehensive gene panel associated with SCD and inherited arrhythmogenic disorders. We compared three different hybridization-based library preparation technologies in order to implement a suitable NGS workflow for heterogeneous, forensic as well as diagnostic sample material.
The results obtained indicated, that the Illumina technologies Nextera DNA Flex and TruSeq were compatible with samples exhibiting varying levels of degradation. In comparison, the TruSight method also resulted in good sequencing data, but seemed to be more dependent on DNA integrity. The preparation protocols evaluated in our study are not restricted to molecular autopsy investigations and might be helpful for and transferrable to further forensic research applications.
Interactions of drugs with the classical epigenetic mechanism of DNA methylation or histone modification are increasingly being elucidated mechanistically and used to develop novel classes of epigenetic therapeutics. A data science approach is used to synthesize current knowledge on the pharmacological implications of epigenetic regulation of gene expression. Computer-aided knowledge discovery for epigenetic implications of current approved or investigational drugs was performed by querying information from multiple publicly available gold-standard sources to (i) identify enzymes involved in classical epigenetic processes, (ii) screen original biomedical scientific publications including bibliometric analyses, (iii) identify drugs that interact with epigenetic enzymes, including their additional non-epigenetic targets, and (iv) analyze computational functional genomics of drugs with epigenetic interactions. PubMed database search yielded 3051 hits on epigenetics and drugs, starting in 1992 and peaking in 2016. Annual citations increased to a plateau in 2000 and show a downward trend since 2008. Approved and investigational drugs in the DrugBank database included 122 compounds that interacted with 68 unique epigenetic enzymes. Additional molecular functions modulated by these drugs included other enzyme interactions, whereas modulation of ion channels or G-protein-coupled receptors were underrepresented. Epigenetic interactions included (i) drug-induced modulation of DNA methylation, (ii) drug-induced modulation of histone conformations, and (iii) epigenetic modulation of drug effects by interference with pharmacokinetics or pharmacodynamics. Interactions of epigenetic molecular functions and drugs are mutual. Recent research activities on the discovery and development of novel epigenetic therapeutics have passed successfully, whereas epigenetic effects of non-epigenetic drugs or epigenetically induced changes in the targets of common drugs have not yet received the necessary systematic attention in the context of pharmacological plasticity.
Epoxides and diols of polyunsaturated fatty acids (PUFAs) are bioactive and can influence processes such as tumor cell proliferation and angiogenesis. Studies with inhibitors of the soluble epoxide hydrolase (sEH) in animals overexpressing cytochrome P450 enzymes or following the systemic administration of specific epoxides revealed a markedly increased incidence of tumor metastases. To determine whether PUFA epoxides increased metastases in a model of spontaneous breast cancer, sEH-/- mice were crossed onto the polyoma middle T oncogene (PyMT) background. We found that the deletion of the sEH accelerated the growth of primary tumors and increased both the tumor macrophage count and angiogenesis. There were small differences in the epoxide/diol content of tumors, particularly in epoxyoctadecamonoenic acid versus dihydroxyoctadecenoic acid, and marked changes in the expression of proteins linked with cell proliferation and metabolism. However, there was no consequence of sEH inhibition on the formation of metastases in the lymph node or lung. Taken together, our results confirm previous reports of increased tumor growth in animals lacking sEH but fail to substantiate reports of enhanced lymph node or pulmonary metastases.
Objectives: Bladder neck contracture (BNC) is a bothersome complication following endoscopic treatment for benign prostatic hyperplasia (BPH). The objective of our study was to give a more realistic insight into contemporary endoscopic BNC treatment and to evaluate and identify risk factors associated with inferior outcome. Material and Methods: We identified patients who underwent transurethral treatment for BNC secondary to previous endoscopic therapy for BPH between March 2009 and October 2016. Patients with vesico-urethral anastomotic stenosis after radical prostatectomy were excluded. Digital charts were reviewed for re-admissions and re-visits at our institutions and patients were contacted personally for follow-up. Our non-validated questionnaire assessed previous urologic therapies (including radiotherapy, endoscopic, and open surgery), time to eventual further therapy in case of BNC recurrence, and the modality of recurrence management. Results: Of 60 patients, 49 (82%) and 11 (18%) underwent transurethral bladder neck resection and incision, respectively. Initial BPH therapy was transurethral resection of the prostate (TURP) in 54 (90%) and holmium laser enucleation of the prostate (HoLEP) in six (10%) patients. Median time from prior therapy was 8.5 (IQR 5.3–14) months and differed significantly in those with (6.5 months; IQR 4–10) and those without BNC recurrence (10 months; IQR 6–20; p = 0.046). Thirty-three patients (55%) underwent initial endoscopic treatment, and 27 (45%) repeated endoscopic treatment for BNC. In initially-treated patients, time since BPH surgery differed significantly between those with a recurrence (median 7.5 months; IQR 6–9) compared to those treated successfully (median 12 months; IQR 9–25; p = 0.01). In patients with repeated treatment, median time from prior BNC therapy did not differ between those with (4.5 months; IQR 2–12) and those without a recurrence (6 months; IQR 6–10; p = 0.6). Overall, BNC treatment was successful in 32 patients (53%). The observed success rate of BNC treatment was significantly higher after HoLEP compared to TURP (100% vs. 48%; p = 0.026). Type of BNC treatment, number of BNC treatment, and age at surgery did not influence the outcome. Conclusions: A longer time interval between previous BPH therapy and subsequent BNC incidence seems to favorably affect treatment success of endoscopic BNC treatment, and transurethral resection and incision appear equally effective. Granted the relatively small sample size, BNC treatment success seems to be higher after HoLEP compared to TURP, which warrants validation in larger cohorts.
Purpose: To stratify differences in visual semantic and quantitative imaging features in intensive care patients with nonspecific mastoid effusions versus patients with acute mastoiditis (AM) requiring surgical treatment. Methods: We included 48 patients (male, 28; female, 20; mean age, 59.5 ± 18.1 years) with mastoid opacification (AM, n = 24; control, n = 24) who underwent clinically indicated cerebral CT between 12/2007 and 07/2018 in this retrospective study. Semantic features described the extend and asymmetry of mastoid and middle-ear cavity opacification and complications like erosive changes. Minimum, maximum and mean Hounsfield unit (HU) values were obtained as quantitative features. We analyzed the features employing univariate testing. Results: Compared to intensive care patients, AM patients revealed asymmetric mastoid or middle-ear cavity opacification (likelihood-ratio (LR) < 0.001). Applying a dedicated threshold of the extent of opacification, AM patients reached significance levels of LR = 0.042 and 0.002 for mastoid and middle-ear cavity opacification. AM cases showed higher maximum and mean HU values (p = 0.009, p = 0.024). Conclusions: We revealed that the extent and asymmetry of mastoid and middle-ear cavity opacification differs significantly between AM patients and intensive care patients. Multicenter research is needed to expand our cohort and possibly pave the way to build a non-invasive predictive model for AM in the future.
Correct cellular function is ensured by a complex network of proteins and enzymes, regulating protein synthesis and degradation. This protein network, maintaining the so-called protein homeostasis, regulates those processes on multiple levels, producing new or degrading old proteins to cope with changing intra- and extracellular environments. Disturbance of this tightly regulated machinery can have severe effects on the cell and can lead to a variety of pathologies on organism level. Diseases including cancer, neurodegeneration and infections are associated with causative or consequent alterations in protein homeostasis. To understand the pathologies of these diseases, it is therefore critical to examine how perturbations of protein homeostasis affect cellular pathways and physiology. In the recent years, analysis of protein homeostasis networks has resulted in the development of novel therapeutic approaches. However, for many factors it remains unclear how the cell is affected, if they are disturbed. Protein synthesis and degradation represent immediate responses of the cell to changes and need to be studied in the right timeframe, making them difficult to access by common methodology. In this work we developed a new mass spectrometry (MS) based method to study protein synthesis and degradation on a system-wide scale. Multiplexed enhanced protein dynamic (mePROD) MS was developed, overcoming these limitations by special sample mixing and novel data analysis protocols. MePROD thereby enables the measurement of rapid and transient (e.g. minutes) changes in protein synthesis of thousands of proteins. During responses of the cell to stressors (e.g. protein misfolding, oxidation or infection), two major pathways regulate the protein synthesis: the Integrated Stress Response (ISR) and mammalian target of rapamycin (mTOR). Both pathways have been connected with various diseases in the past and are common therapy targets. Although both pathways target protein synthesis in stress responses, the set of targets regulated by these pathways was believed to differ. Through the new mePROD MS method we could measure a comprehensive comparison of both pathways for the first time, revealing comparable system-wide patterns of regulation between the two pathways. This changed the current view on the regulation elicited by these pathways and furthermore represents a useful resource for the whole field of research. We could further develop the mePROD method and decrease MS measurement time needed to obtain an in-depth dataset. Through implementation of logic based instrument methods, it was possible to enhance the number of measured proteins by approximately three-fold within the same measurement time.
The dynamics of protein synthesis and degradation are frequently modulated by pathogens infecting the cell to promote pathogen replication. At the same time, the cell counteracts the infection by modulating protein dynamics as well. To develop useful therapy approaches to fight infections, it therefore is necessary to understand the complex changes within the host cell during infections on a system-wide scale. In 2019, a novel coronavirus spread around the world, causing a world-wide health-crisis. To better understand this novel virus and its infection of the host cell we conducted a study applying the mePROD methodology and classical proteomics to characterize the dynamic changes during the infection course in vitro. We discovered that the infection remodeled a diverse set of host cell pathways (e.g. mRNA splicing, glycolysis, DNA synthesis and protein homeostasis) and thereby showed possible targets for antiviral therapy. By targeted inhibition of these pathways, we could observe that these pathways indeed are necessary for SARS-CoV-2 replication and their inhibition could reduce viral load in the cells. Another experimental approach focused on the dynamic changes of protein modification, namely phosphorylation, after infection with SARS-CoV-2. Here, we could show the very important participation of growth factor signaling pathways in viral proliferation. Both studies together revealed critical pathways that are needed for the viral proliferation and hence are promising candidates for further therapies. Subsequent targeting of these pathways by either already approved drugs (Ribavirin and Sorafenib) or drugs in clinical trials (2-deoxyglucose, Pladienolide-B, NMS-873, Pictilisib, Omipalisib, RO5126766 and Lonafarnib) could block viral replication in vitro and suggests important clinical approaches targeting SARS-COV-2 infection.
Development of treatment strategies of chronic inflammatory disorders relies on on-going progress in drug discovery approaches and related molecular biologics. This study presents a gene reporter-based approach of phenotypic screening for anti-inflammatory compounds in the context of rheumatoid arthritis (RA).
CEBPD gene, used as the target gene for the screening readout, encodes CCAAT/enhancer binding protein delta (C/EBPδ) transcription factor (TF). Structural and regulatory characteristics of CEBPD gene as well as function of C/EBPδ TF in the context of inflammation satisfied assay requirements. C/EBPδ TF acts as a key regula-tor of inflammatory gene transcription in macrophages (Mϕ) and is observed to con-tribute to disease development in both a rodent model of RA and RA patient biopsies.
Despite well-described pro-inflammatory effects of C/EBPδ TF, it functions as a cell context-specific signal integrator showing also an anti-inflammatory activity. Conse-quently, both activation and inhibition of CEBPD alike may display a desired anti-inflammatory effect. The aim of this study was to develop a high-throughput screening assay for
CEBPD-modulating compounds and confirm hit compounds’ anti-inflammatory effects via gene expression analysis.
Generation and characterization of a multi-gene-reporter cassette 1.0 encoding enzy-matic secreted alkaline phosphatase (SEAP) gene reporter was a priority during the assay development. Chemiluminescent SEAP assay demonstrating high assay sensitivi-ty, broad linear range, high reproducibility and repeatability was chosen to monitor activity of the defined CEBPD promoter (CEBPD::SEAP). PMA-differentiated and M1-polarized THP-1-derived Mϕ stably expressing multi-gene-reporter cassette 1.0 were used as the assay’s cellular system. mRNA expression of both reporter CEBPD::SEAP and endogenous CEBPD mirrored each other in response to a LPS and IFN-g-triggered inflammatory stimulus (M1 treatment), even though the defined CEBPD promoter re-gion, utilized in the assay, contained only the most proximal and known regulatory se-quences. SEAP chemiluminescence in the reporter cells´ supernatant reliably correlat-ed with the M1 treatment-induced CEBPD::SEAP gene expression. The final screening protocol was developed for semi-automatic screening in the 384-well format.
In total, 2054 compounds from LOPAC®1280 and ENZO®774 libraries were screened twice
using the enzymatic SEAP readout with subsequent analysis of 18 selected compounds: nine with the highest and nine with the lowest signals, further characterized by qPCR. Gene expression levels of endogenous CEBPD, CEBPD::SEAP reporter as well as, IL-6,
IL-1β, and CCL2 as inflammatory markers were quantified. qPCR assays failed to corre-late to SEAP readout in 15 compounds within three standard deviations (SDs) from sol-vent control: nine low signal and six high signal compounds. Demonstrating both assay sensitivity and specificity, a correlation between qPCR gene expression and SEAP readout was observed for three hit compounds with signals above three SDs: BET inhib-itors (BETi) GSK 1210151A and Ro 11-1464 as well as an HDAC inhibitor (HDACi) vori-nostat. The control compound trichostatin A (TSA) that reproducibly upregulated SEAP readout is also an HDAC inhibitor with a similar structure to vorinostat and was there-fore included in the anti-inflammatory phenotype analysis.
The observed suppression of IL-6, IL-1ß, and CCL2 gene expression by hit compounds suggested their anti-inflammatory effect in THP-1 reporter Mϕ. mRNA expression of
IL-6 and CCL2 was suppressed by HDACi and BETi at both 4 and 24 hours, while BETi reduced IL-1β mRNA expression 24 hour time point. BETi significantly upregulated gene expression of both reporter CEBPD::SEAP and endogenous CEBPD, 4 hours after M1 treatment. At the same time point, HDACi completely abolished the mRNA expres-sion of the endogenous CEBPD, while simultaneously upregulating mRNA expression of the reporter CEBPD::SEAP. The use of the most proximal 300 base pairs region of en-dogenous CEBPD promoter, making the upstream regulatory elements unavailable in the assay, may account for differential expression levels of SEAP and C/EBPδ TF. This observation corroborated the need to include a longer and more extensive CEBPD´s gene regulatory area. Thus, an improved multi-gene-reporter cassette 2.0 was gener-ated to be used on the basis of a bacterial artificial chromosome (BAC) covering CE-BPD´s genomic area of about 200,000 base pairs.
The generated screening assay is flexible, reliable, and sensitive displaying potential for drug discovery and drug repurposing. The pharmacological modulation of CEBPD gene expression, first reported for GSK 1210151A, Ro 11-1464, and vorinostat, contrib-utes to the understanding of inflammatory responses in Mϕ and may have RA thera-peutic applications.
Outcomes of SARS-CoV-2 infections in patients with neurodegenerative diseases in the LEOSS cohort
(2021)
The impact of preexisting neurodegenerative diseases on superimposed SARS-CoV-2 infections remains controversial. Here we examined the course and outcome of SARS-CoV-2 infections in patients affected by Parkinson's disease (PD) or dementia compared to matched controls without neurodegenerative diseases in the LEOSS (Lean European Open Survey on SARS-CoV-2-infected patients) cohort, a large-scale prospective multicenter cohort study...
Die Ätiologie der Autismus-Spektrum-Störungen (ASS) ist in genetischen Risikofaktoren sowie der Interaktion von genetischen und biologisch wirksamen Umweltrisikofaktoren begründet. ASS werden aufgrund von Verhaltensmerkmalen, nämlich bleibend eingeschränkter sozialer Kommunikation, sowie durch stereotypes Verhalten, sensorische und Sonderinteressen diagnostiziert. Hinsichtlich des genetischen Hintergrundes besteht eine hohe genetische Heterogenität, d. h., die genetischen Ursachen sind vielfältig und individuell oft sehr unterschiedlich ausgeprägt. Allerdings konvergieren diese Ursachen in bestimmten biologischen Mechanismen und überlappenden biologischen Endstrecken, deren Veränderung sehr wahrscheinlich den autismusspezifischen Verhaltensmerkmalen zugrunde liegt. Die vorliegende, selektive Literaturübersicht summiert die genetischen Befunde und fokusiert sich insbesondere auf Mechanismen und Endstrecken, die aufgrund der neueren Forschung immer besser charakterisiert werden. Der Artikel schließt mit Hinweisen zur klinischen Relevanz der aktuellen Befunde sowie offenen Fragen der translationalen Forschung.
COPD and asthma are two distinct but sometimes overlapping diseases exhibiting varying degrees and types of inflammation on different stages of the disease. Although several biomarkers are defined to estimate the inflammatory endotype and stages in these diseases, there is still a need for new markers and potential therapeutic targets. We investigated the levels of a phytohormone, abscisic acid (ABA) and its receptor, LANCL2, in COPD patients and asthmatics. In addition, PPAR-γ that is activated by ABA in a ligand-binding domain-independent manner was also included in the study. In this study, we correlated ABA with COPD-propagating factors to define the possible role of ABA, in terms of immune regulation, inflammation, and disease stages. We collected blood from 101 COPD patients, 52 asthmatics, and 57 controls. Bronchoscopy was performed on five COPD patients and 29 controls. We employed (i) liquid chromatography–tandem mass spectrometry and HPLC to determine the ABA and indoleamine 2,3-dioxygenase levels, respectively; (ii) real-time PCR to quantify the gene expression of LANCL2 and PPAR-γ; (iii) Flow cytometry to quantify adipocytokines; and (iv) immunoturbidimetry and ELISA to measure CRP and cytokines, respectively. Finally, a multinomial regression model was used to predict the probability of using ABA as a biomarker. Blood ABA levels were significantly reduced in COPD patients and asthmatics compared to age- and gender-matched normal controls. However, PPAR-γ was elevated in COPD patients. Intriguingly, ABA was positively correlated with immune-regulatory factors and was negatively correlated with inflammatory markers, in COPD. Of note, ABA was increased in advanced COPD stages. We thereby conclude that ABA might be involved in regulation of COPD pathogenesis and might be regarded as a potential biomarker for COPD stages.
Chronische Herzinsuffizienz ist eine der führenden Todesursachen im Rahmen kardiovaskulärer Erkrankungen und ist mit einer hohen Anzahl an Komorbiditäten assoziiert. Unter anderem führt Herzinsuffizienz zu Veränderungen des Immunsystems, welche denen der Immunoseneszenz ähneln. Als einflussreiche Modulatoren ganzer molekularbiologischer Regelkreise sind microRNAs in den letzten Jahren zunehmend in den Fokus gerückt. Diese nicht-kodierenden, kurzen RNA-Einzelstränge können die Genexpression von vielen Zielgenen durch spezifisches Binden der jeweiligen mRNA Transkripte kontrollieren. Aufgrund zum Teil gewebe-, zelltyp- und prozess-spezifischer Expression können microRNAs auch als mögliche Biomarker für spezifische klinische Fragestellungen dienen.
Im Rahmen der vorliegenden Arbeit wurde die Expression von immunmodulatorischen microRNAs im peripheren Blut (PB) von jungen und gealterten gesunden Probanden (y/h bzw. o/h) sowie Patienten mit chronischer Herzinsuffizienz (CHF) untersucht. Dabei wurde ein Bezug auf Immunoseneszenz bzw. die Auswirkung von CHF auf das Immunsystem hergestellt. Im Rahmen dessen wurden Leukozyten-, insbesondere Lymphozyten-Subpopulationen analysiert.
Hierzu wurden Probanden in die drei folgenden Gruppen eingeschlossen: Patienten mit CHF (n=18, durchschnittliches Alter 64 Jahre), alters-korrelierte gesunde Probanden (n=13, durchschnittliches Alter 64 Jahre) sowie junge gesunde Probanden (n=30, durchschnittliches Alter 25 Jahre). Neben der Erhebung der klinischen Daten wurde peripheres Blut zur Bestimmung der microRNA-Expressionslevels sowie für durchflusszytometrische Analysen der Leukozytenpopulationen gewonnen.
In den Expressionsanalysen konnte eine alters- und herzinsuffizienz-abhängige Dysregulation einzelner microRNAs beobachtet werden. Insbesondere Mitglieder der miR-181-Familie, spezifisch miR-181a und miR-181c, waren im Alter niedriger exprimiert, zudem war die Expression von miR-181c bei Vorliegen einer CHF deutlicher reduziert. Des Weiteren zeigte sich eine altersabhängige erhöhte Expression von miR-34a, wobei das Vorliegen von CHF keine Auswirkung auf die Expression zeigte. Bei den microRNAs miR-146a und miR-223 konnte keine signifikante alters- oder CHF-abhängige Regulation nachgewiesen werden. Lediglich zeigte bei der miR-155 zeigte sich eine signifikante Reduktion bei Vorliegen einer CHF im Vergleich o/h Probanden.
In Hinblick auf die Leukozytenpopulationen im peripheren Blut wiesen Patienten mit CHF höhere Zahlen an Leukozyten auf, alle miR-181 Mitglieder zeigten hierbei eine inverse Korrelation. Dagegen stellte sich in Hinblick auf die Zusammensetzung der Leukozyten-Subpopulationen eine Reduktion der Lymphozytenfraktion im Alter dar, besonders bei Patienten mit CHF. Insbesondere zeigte sich eine altersabhängige Abnahme der B-Lymphozytenpopulation, wobei auch hier das Vorliegen einer CHF diesen Effekt verstärkte. Die Expression miR-181a und miR-181c sowie miR-146a und miR-223 korrelierte positiv mit dem Anteil der B-Lymphozyten. Innerhalb der B-Zellen zeigte sich eine alters- und CHF-abhängige Reduktion der naïven B-Zellen, welche positiv mit der Expression von miR-181c, miR-146a und miR-223 korrelierte. Die beobachteten Veränderungen der B-Zell-Subpopulationen zeigten sich insbesondere bei CHF Patienten mit ischämischer Ursache im Vergleich zur dilatativen Kardiomyopathie.
Bei den untersuchten T-Lymphozyten-Subpopulationen zeigte sich eine altersabhängiger Abfall bei den zytotoxischen T-Zellen. Das Vorliegen einer CHF verstärkte diesen Effekt. Die beobachteten Veränderungen der T-Zell-Subpopulation korrelierten nicht mit der Expression der untersuchten microRNAs.
Im Gegensatz zu den lymphoiden Subpopulationen zeigte sich ein Anstieg der neutrophilen Granulozyten und der Monozyten im Alter, es stellte sich jeweils eine negative Korrelation mit der Expression von miR-181 Transkripten sowie miR-155, miR-146a und miR-223 dar.
Zusammenfassend zeigten sich signifikant erniedrigte Expressionslevels von miR-181c im Alter, was mit Immunoseneszenz-bedingten Veränderungen des peripheren Bluts einherging. Diese Veränderungen zeigten sich zusätzlich verstärkt bei Patienten mit CHF. Zukünftig könnten miR-181c Expressionslevel in peripherem Blut als Biomarker für die Immunfunktionen bei CHF Patienten dienen und in Hinblick auf eine mögliche prospektive Information evaluiert werden.
Background: Previous studies have demonstrated that CF (Cystic Fibrosis) prognosis is dependent of three major parameters: FEV1 (Forced Expiratory Pressure in one second), BMI (Body Mass Index) and need of intravenous antibiotic therapy. The CF centres of Frankfurt, Germany, and Moscow, Russia, care for cystic fibrosis patients. We decided to investigate and compare both centers from 1990 to 2015. No comparable study has been published so far.
Method: German patient data was collected from the national cystic fibrosis database “Muko.web”. Missing values were extracted from the Hospital Information System. Russian patient data were taken directly from the medical records in Moscow. In a descriptive statistical analysis with Bias and R Studio the values were compared.
Result: A total of 428 patients from Moscow (217 male, 211 female; 348 (81,3%) were P. aeruginosa positive) and 159 patients from Frankfurt (92 male, 67 female; 137 (86,2%) with P. aeruginosa positive) were compared with regard to P. aeruginosa positivity, BMI, FEV1 and need of intravenous antibiotic therapy. CF patients in Moscow stratified by age groups had lower BMI than CF patients in Frankfurt (age 16-18: p=0,003; age 19-22: p=0,004; age 23-29: p<0,001; age 30-35: p<0,001; age 36-66: p=0,024). In a matching pairs analysis including 100 patients from Frankfurt and 100 patients from Moscow for the year 2015 FEV1 was significantly lower in Moscow patients (p<0,001).
Conclusion: BMI, FEV1 and need of intravenous therapy have significant impact on survival and on quality of life of CF patients. A lower BMI and a lower FEV1 result in a worse survival and determine the prognosis. This study showed a significant difference in prognostic parameters between Frankfurt and Moscow in the crosssectional analysis for the year 2015. A further study should evaluate this difference to show whether this difference will be found over a longer period of time.
Die Sicherstellung der hausärztlichen Versorgung ist vor allem im ländlichen Raum mit regional unterschiedlich starker Ausprägung zunehmend gefährdet. Ein wesentlicher Grund liegt in der stetig sinkenden Zahl an hausärztlich tätigen Ärzten/innen. Ursächlich hierfür sind einerseits die hohen „Bruttoabgänge“ von Hausärzten/innen, zumeist aufgrund altersbedingten Ausscheidens, und einem andererseits eklatanten Nachwuchsproblem.
Um dieser problematischen Entwicklung entgegenzuwirken, kommt der Gewinnung hausärztlichen Nachwuchses eine Schlüsselrolle zu. In Flächenländern wie Australien, Kanada oder den USA, die ähnlichen Herausforderungen schon seit längerer Zeit gegenüberstehen, existieren seit den 1970er Jahren universitäre Schwerpunktprogramme, die die Allgemeinmedizin bereits in der medizinischen Ausbildung fördern. Breit angelegte Evaluationsstudien zeigen dabei, dass die Teilnahme an longitudinalen Längsschnittcurricula einen positiven Effekt auf die Wahrscheinlichkeit hat, nach Abschluss des Studiums eine Weiterbildung im Fach Allgemeinmedizin aufzunehmen und sich darüber hinaus hausärztlich (im ländlichen Raum) niederzulassen.
Unter der Annahme, dass eine allgemeinmedizinische Schwerpunktsetzung im Studium das Interesse am selbigen Fach erhöht und darüber hinaus eine hausärztliche Karriereplanung positiv beeinflusst, soll die hier vorliegende Promotionsarbeit folgende Forschungsfrage beantworten: Wie kann ein longitudinales, fachbereichsweites Lehrangebot konzeptionell gestaltet werden, welches es Medizinstudierenden ermöglicht, Allgemeinmedizin im ländlichen Raum kennenzulernen?
Zur Beantwortung der Fragestellung wurde ein triangulierender Forschungsansatz gewählt, der aus mehreren Arbeitsschritten besteht: 1. Erarbeitung einer Übersichtarbeit bestehend aus einer Literaturrecherche und der Kontaktaufnahme zu hiesigen Experten, 2. schriftliche und telefonische Befragung aller medizinischen Fakultäten Deutschlands 3. webbasierte Befragung von Medizinstudierenden der Goethe Universität, Frankfurt, 4. konzeptionelle Entwicklung und Implementierung eines universitären Schwerpunktprogramms zur Förderung der Allgemeinmedizin in ländlichen Regionen auf Basis der in Schritt eins bis drei gewonnen Ergebnisse.
Mittels der verschiedenen methodischen Entwicklungsschritte konnte im Zeitraum von 2015 bis 2016 das longitudinale Schwerpunktprogramm „Landpartie 2.0“ konzeptionell entwickelt und ab dem Wintersemester 2016/2017 in das Medizinstudium der Goethe-Universität, Frankfurt am Main, implementiert werden.
Das entwickelte Lehrangebote richtet sich pro Jahr in der Regel an bis zu 15 Studierende ab dem klinischen Studienabschnitt. Im Kern beinhaltet das mehrsemestrige Angebot wiederkehrende Praxisphasen in ausgewählten und geschulten Hausarztpraxen in ländlichen Regionen. Begleitet werden die Praktika von vor- und nachbereitenden Seminaren an der Universität, dem Kurs Allgemeinmedizin in einer ländlichen Hausarztpraxis und einem jährlichen Tagesausflug zu innovativen Gesundheitsmodellen. Seit Einführung des Programms konnten 62 Studierende in die „Landpartie 2.0“ aufgenommen werden.
Erste Evaluationsergebnisse belegen eine sehr hohe Zufriedenheit mit den einzelnen Programmbestandteilen unter den Teilnehmenden. Langfristig sollen darüber hinaus in einer Verbleibstudie Effekte auf die Motivation für eine hausärztliche Tätigkeit (auf dem Land) sowie Karriereverläufe abgebildet werden.
Insgesamt erwies sich das gewählte methodische Vorgehen als zielführend. Mittels der einzelnen Entwicklungsschritte konnte ein abgestimmtes, umfassendes und den wissenschaftlichen Erkenntnissen berücksichtigendes Längsschnittcurriculum am Fachbereich Medizin der Goethe Universität, Frankfurt am Main, erfolgreich konzeptioniert und implementiert werden.
Current research on medical biomaterials have shown that the physical and chemical characteristics of biomaterials determine the body inflammatory cellular reaction after their implantation. The aim of this study was to evaluate the individual effects of the physical characteristics over the initial biomaterial-cellular interaction and the inflammatory cellular reaction. For this purpose, an equine-derived collagen hemostatic sponge (E-CHS) was modified by pressing and evaluated using ex vivo, in vitro and in vivo methods.
The E-CHS was pressed by applying constant pressure (6.47± 0.85 N) for 2 min using a sterile stainless-steel cylinder and cut in segments of 1cm2. Subsequently, E-CHS and the pressed equine-derived collagen hemostatic sponge (P-E-CHS) were studied as two independent biomaterials and compared to a control group (CG).
A blood concentrate containing inflammatory cells known as platelet rich fibrin (PRF) was used to mimic the initial biomaterial-cell interaction and to measure the absorption coefficient of the biomaterials to liquid PRF (iPAC). Additionally, the biomaterials were cultivated together with PRF for 3 and 6 days to measure the induction of pro-inflammatory cytokines (TNF-α and IL-8). The results were obtained through enzyme-linked immunosorbent assay (ELISA) and histological methods. PRF cultivated without biomaterials served as the CG. Additionally, the biomaterials were evaluated in vivo using a subcutaneous model in Wistar rats and compared to sham operated animals (CG) representing physiologic wound healing. After 3, 15 and 30 days, the explanted samples were evaluated using histochemical and immunohistochemical (IHC) staining using the following markers: CD68 (pan macrophages), CCR7 (pro-inflammatory macrophages, M1), CD206 (pro-wound healing macrophages, M2) and α-Smooth Muscle Actin (α-SMA; vessel identification).
After the mixture of liquid PRF with both biomaterials for 15 minutes, the ex vivo results showed that E-CHS was penetrated by cells, whereas P-E-CHS was cell-occlusive. Additionally, P-E-CHS induced a higher release of pro-inflammatory cytokines compared to liquid PRF alone (CG) and E-CHS after 3 days (P< 0.05). Although the biomaterial was pressed, the difference of the iPAC value did not show statistical differences. In vivo, the CG induced at day 3 a higher inflammatory response compared to the experimental groups (EG) (P< 0.05). The intergroup comparison showed that P-E-CHS induced a higher presence of macrophages (CD68+/CC7+) compared to E-CHS at day 3 (P< 0.05). Only CD68+/CCR7+ mononuclear cells (MNCs) were observed without multinucleated giant cells (MNGCs). After 15 days, the presence of macrophages (CD68+ P<0.01 /CCR7+ P<0.001 /CD206+ P<0.05) reduced considerably in the CG. On the contrary, the inflammatory response increased in the EGs (CD68+/CCR7+). The intergroup comparison showed that this increment was statistically significant when comparing E-CHS and P-E-CHS to the CG at day 15 (P<0.01 and P< 0.05 respectively). At this time point, a reduced number of MNGCs were observed in the EGs. In the CG no MNGCs were observed. Furthermore, E-CHS showed a faster degradation rate and was fully invaded by cells and vessels formed in its interior region. On the other hand, P-E-CHS remained occlusive to cell penetration and vessels were formed only in the periphery. After 30 days, the cellular reaction shifted to a higher number of M2 macrophages (CD260+) in all groups and a reduced presence of CD68+ and CCR7+ MNCs. Both biomaterials degraded and only small fragments were found in the implantation bed surrounded by MNGCs (CCR7+).
These results are of high clinical relevance and show that changes in biomaterial properties have a significant impact on their interaction with the body. They also serve as insight into the possibility to develop versatile biomaterials with different applications. For example, E-CHs can be applied to support hemostasis in a bleeding alveolar socket and P-E-CHs by being cell occlusive and having a delayed degradation rate can be applied for guided bone and tissue regeneration.
Background: To compare severe infectious complication rates after transrectal prostate biopsies between cephalosporins and fluoroquinolones for antibiotic monoprophylaxis.
Material and Methods: In the multi-institutional cohort, between November 2014 and July 2020 patients received either cefotaxime (single dose intravenously), cefpodoxime (multiple doses orally) or fluoroquinolones (multiple-doses orally or single dose intravenously) for transrectal prostate biopsy prophylaxis. Data were prospectively acquired and retrospectively analyzed. Severe infectious complications were evaluated within 30 days after biopsy. Logistic regression models predicted biopsy-related infectious complications according to antibiotic prophylaxis, application type and patient- and procedure-related risk factors.
Results: Of 793 patients, 132 (16.6%) received a single dose of intravenous cefotaxime and were compared to 119 (15%) who received multiple doses of oral cefpodoxime and 542 (68.3%) who received fluoroquinolones as monoprophylaxis. The overall incidence of severe infectious complications was 1.0% (n=8). No significant differences were observed between the three compared groups (0.8% vs. 0.8% vs. 1.1%, p=0.9). The overall rate of urosepsis was 0.3% and did not significantly differ between the three compared groups as well.
Conclusion: Monoprophylaxis with third generation cephalosporins was efficient in preventing severe infectious complications after prostate biopsy. Single intravenous dose of cefotaxime and multiday regimen of oral cefpodoxime showed a low incidence of infectious complications <1%. No differences were observed in comparison to fluoroquinolones.
Context: Despite overwhelming evidence for endovascular therapy in anterior circulation ischemic stroke due to large-vessel occlusion, data regarding the treatment of acute basilar artery occlusion (BAO) are still equivocal. The BASICS trial failed to show an advantage of endovascular therapy (EVT) over best medical treatment (BMT). In contrast, data from the recently published BASILAR registry showed a better outcome in patients receiving EVT.
Objective: The aim of the study was to investigate the safety and efficacy of EVT plus BMT vs. BMT alone in acute BAO.
Methods: We analyzed the clinical course and short-term outcomes of patients with radiologically confirmed BAO dichotomized by BMT plus EVT or BMT only as documented in a state-wide prospective registry of consecutive patients hospitalized due to acute stroke. The primary endpoint was a favorable functional outcome (mRS 0–3) at hospital discharge assessed as common odds ratio using binary logistic regression. Secondary subgroup analyses and propensity score matching were added. Safety outcomes included mortality, the rate of intracerebral hemorrhages, and complications during hospitalization.
Results: We included 403 patients with acute BAO (2017–2019). A total of 270 patients (67%) were treated with BMT plus EVT and 133 patients (33%) were treated with BMT only. A favorable outcome (mRS 0–3) was observed in 33.8% of the BMT and 26.7% of the BMT plus EVT group [OR.770, CI (0.50–1.2)]. Subgroup analyses for patients with a NIHSS score > 10 at admission to the hospital revealed a benefit from EVT [OR 3.05, CI (1.03–9.01)].
Conclusions: In this prospective, quasi population-based registry of patients hospitalized with acute BAO, BMT plus EVT was not superior to BMT alone. Nevertheless, our results suggest that severely affected BAO patients are more likely to benefit from EVT.
Purpose: Jejunoileal atresia (JIA) is a rare disease. We aimed to determine the overall incidence of this malformation and associated malformations in a national cohort. Furthermore, we compared the treatment results of this cohort with the current literature.
Methods: Data from the major health insurance company, which covers ∼30% of the German population, were analyzed. All patients with ICD-10-Code Q41.1-9 (atresia of jejunum, ileum, other parts and not designated parts of the small bowel) who underwent any surgical procedure for small bowel were analyzed in a 10-year period between 2007 and 2016.
Results: A total of 435 patients were included in the study. The incidence was 2.1 per 10,000 live births. The male:female ratio was 1:2. Sixty-four percent were premature, 21% had associated cardiac anomalies, 16% had abdominal wall defects, 7% had urogenital malformations, and 7% had cystic fibrosis. Sixty percent of all patients with jejunoileal atresia, 57% of patients with accompanying abdominal wall defects and 72% of patients with associated cystic fibrosis required ostomy as the initial procedure. In 25% of all patients, only one intestinal operation was coded. In 39% of patients, two operations were coded. Twelve percent of all patients required feeding gastrostomy or jejunostomy. Sixteen percent of all patients presented with liver-related complications, i.e., cholestasis or liver insufficiency. Six patients underwent an intestinal lengthening procedure (2 Bianchi, 4 STEP). In five patients, initial lengthening was performed within 1 year after the first intestinal operation. Mortality until 1 year after initial surgery was 5%. Of those who died, 88% were premature, 34% had cardiac anomalies and 16% had abdominal wall defects. None had cystic fibrosis. Patients with ostomy significantly more often needed operative central venous line or operative feeding tube. Short bowel was coded significantly more often in these patients.
Conclusion: Patients with JIA present with low mortality. The rate of ostomies is higher than in literature. To give clinical recommendations for the initial surgical approach, further clinical research is needed.
Objective: Vertigo is a common side effect of cochlear implant (CI) treatment. This prospective study examines the incidence of postoperative vertigo over time and aims to analyze influencing factors such as electrode design and insertion angle (IA).
Study Design and Setting: This is a prospective study which has been conducted at a tertiary referral center (academic hospital).
Patients: A total of 29 adults were enrolled and received a unilateral CI using one of six different electrode carriers, which were categorized into “structure-preserving” (I), “potentially structure-preserving” (II), and “not structure-preserving” (III).
Intervention: Subjective vertigo was assessed by questionnaires at five different time-points before up to 6 months after surgery. The participants were divided into four groups depending on the time of the presence of vertigo before and after surgery. Preoperatively and at 6 months postoperatively, a comprehensive vertigo diagnosis consisting of Romberg test, Unterberger test, subjective visual vertical, optokinetic test, video head impulse test, and caloric irrigation test was performed. In addition, the IA was determined, and the patients were divided in two groups (<430°; ≥430°).
Main Outcome Measures: The incidence of vertigo after CI surgery (group 1) was reported, as well as the correlation of subjective vertigo with electrode array categories (I–III) and IA.
Results: Among the participants, 45.8% experienced new vertigo after implantation. Based on the questionnaire data, a vestibular origin was suspected in 72.7%. The results did not show a significant correlation with subjective vertigo for any of the performed tests. In group 1 with postoperative vertigo, 18% of patients showed conspicuous results in a quantitative analysis of caloric irrigation test despite the fact that the category I or II electrodes were implanted, which are suitable for structure preservation. Average IA was 404° for the overall group and 409° for group 1. There was no statistically significant correlation between IA and perceived vertigo.
Conclusions: Though vertigo after CI surgery seems to be a common complication, the test battery used here could not objectify the symptoms. Further studies should clarify whether this is due to the multifactorial cause of vertigo or to the lack of sensitivity of the tests currently in use. The proof of reduced probability for vertigo when using atraumatic electrode carrier was not successful, nor was the proof of a negative influence of the insertion depth.
Cellular therapy has entered the daily clinical life with the approval of CAR T cell therapeutics and dendritic cell (DCs) vaccines in the US and the EU. In addition, numerous other adoptive cellular products, including natural killer (NK) cells, are currently evaluated in early phase I/ II clinical trials for the treatment of cancer patients. Despite these promising accomplishments, various challenges remain to be mastered in order to ensure sustained therapeutic success. These include the identification of strategies by which tumor cells escape the immune system or establish an immunosuppressive tumor microenvironment (TME). As part of the innate immune system, DCs and NK cells are both present within the TME of various tumor entities. While NK cells are well known for their intrinsic anti-tumor activity by their cytotoxicity capacities and the secretion of pro-inflammatory cytokines, the role of DCs within the TME is a double-edged sword as different DC subsets have been described with either tumor-promoting or -inhibiting characteristics. In this review, we will discuss recent findings on the interaction of DCs and NK cells under physiological conditions and within the TME. One focus is the crosstalk of various DC subsets with NK cells and their impact on the progression or inhibition of tumor growth. In addition, we will provide suggestions to overcome the immunosuppressive outcome of the interaction of DCs and NK cells within the TME.
Despite good clinical functional outcome, deficits in gait biomechanics exist 2 years after total hip replacement surgery. The aims of this research were (1) to group patients showing similar gait adaptations to hip osteoarthritis and (2) to investigate the effect of the surgical treatment on gait kinematics and external joint moments. In a secondary analysis, gait data of 51 patients with unilateral hip osteoarthritis were analyzed. A k-means cluster analysis was performed on scores derived via a principal component analysis of the gait kinematics. Preoperative and postoperative datasets were statistically tested between clusters and 46 healthy controls. The first three principal components incorporated hip flexion/extension, pelvic tilt, foot progression angle and thorax tilt. Two clusters were discriminated best by the peak hip extension during terminal stance. Both clusters deviated from healthy controls in spatio-temporal, kinematic and kinetic parameters. The cluster with less hip extension deviated significantly more. The clusters improved postoperatively but differences to healthy controls were still present one year after surgery. A poor preoperative gait pattern in patients with unilateral hip osteoarthritis is associated with worse gait kinematics after total hip replacement. Further research should focus on the identification of patients who can benefit from an adapted or individualized rehabilitation program.
Cannabinoid drugs are registered for postoperative nausea and emesis, Tourette syndrome and tumor-related anorexia, but are also used for spasticity and pain relief, among other conditions. Clinical studies for spasmolysis have been equivocal and even conclusions from meta-analyses were not consistent. This may be due to uncertainty in diagnostic criteria as well as a lack of direct spasmolytic activity (direct causality). In this review we used the Hill criteria to investigate whether a temporal association is causal or spurious. Methods: A systematic literature search was performed to identify all clinical trials of cannabinoids for spasticity. Studies were evaluated for dose dependency and time association; all studies together were analyzed for reproducibility, coherence, analogy and mechanistic consistency. A Funnel plot was done for all studies to identify selection or publication bias. Results: Twenty-seven studies were included in this meta-analysis. The spasmolytic activity (effect strength) was weak, with a nonsignificant small effect in most studies and a large effect only in a few studies (“enriched” studies, low patient numbers). No dose dependency was seen and plotting effect size vs. daily dose resulted in a slope of 0.004. Most studies titrated the cannabinoid to the optimum dose, e.g., 20 mg/d THC. The effect decreased with longer treatment duration (3–4 months). The spasmolytic effect is consistent for different European countries but not always within a country, nor is the effect specific for an etiology (multiple sclerosis, spinal cord injury, others). For other criteria like plausibility, coherence or analogous effects, no data exist to support or refute them. In most studies, adverse effects were frequently reported indicating a therapeutic effect only at high doses with relevant side effects. Conclusions: Current data do not support a specific spasmolytic effect; a general decrease in CNS activity analogous to benzodiazepines appears more likely. Whether individual patients or specific subgroups benefit from cannabinoids is unclear. Further studies should compare cannabinoids with other, nonspecific spasmolytic drugs like benzodiazepines.
Background: Reduction of the Sphingosine-1-phosphate (S1P) degrading enzyme S1P lyase 1 (SGPL1) initiates colorectal cancer progression with parallel loss of colon function in mice. We aimed to investigate the effect of SGPL1 knockout on the stem cell niche in these mice.
Methods: We performed immunohistochemical and multi-fluorescence imaging on tissue sections of wildtype and SGPL1 knockout colons under disease conditions. Furthermore, we generated SGPL1 knockout DLD-1 cells (SGPL1−/−M.Ex1) using CRISPR/Cas9 and characterized cell cycle and AKT signaling pathway via Western blot, immunofluorescence, and FACS analysis.
Results: SGPL1 knockout mice were absent of anti-Ki-67 staining in the stem cell niche under disease conditions. This was accompanied by an increase of the negative cell cycle regulator FOXO3 and attenuation of CDK2 activity. SGPL1−/−M.Ex1 cells show a similar FOXO3 increase but no arrest of proliferation, although we found a suppression of the PDK1/AKT signaling pathway, a prolonged G1-phase, and reduced stem cell markers.
Conclusions: While already established colon cancer cells find escape mechanisms from cell cycle arrest, in vivo SGPL1 knockout in the colon stem cell niche during progression of colorectal cancer can contribute to cell cycle quiescence. Thus, we propose a new function of the S1P lyase 1 in stemness.
Introduction: Mental disorders such as depression are common, and an estimated 264 million people are affected by them throughout the world. In recent years, studies on digital health interventions to treat mental disorders have shown evidence of their efficacy, and interest in using them has increased as a result. In the primary care setting, depression and anxiety are the two most frequently diagnosed and treated mental disorders. When they do not refer them to specialists, primary care professionals such as general practitioners treat patients with mental disorders themselves but have insufficient time to treat them adequately. Furthermore, there is a shortage of psychotherapists and those that exist have long waiting lists for an appointment. The purpose of this mixed methods systematic review is to explore the attitudes of primary care professionals towards the use of digital health interventions in the treatment of patients with mental disorders. Their attitudes will provide an indication whether digital mental health interventions can effectively complement standard care in the primary care setting.
Methods and analysis: We searched for qualitative, quantitative and mixed methods studies published in English, German, Spanish, Russian, French and Dutch after January 2010 for inclusion in the review. The included studies must involve digital mental health interventions conducted via computer and/or mobile devices in the primary care setting. The search was conducted in July 2020 in the following electronic bibliographic databases: MEDLINE, Embase, CINAHL, PsycINFO and Web of Science Core Collection. Two reviewers will independently screen titles, abstracts and full texts and extract data. We will use the ‘Integrated methodology’ framework to combine both quantitative and qualitative data.
Ethics and dissemination: Ethical approval is not required. We will disseminate the results of the mixed methods systematic review in a peer-reviewed journal and scientific conferences.
Objectives: Inadequate oral hygiene still leads to many serious diseases all over the world. Therefore, this study aimed to analyze scientific research in the field of oral health in order to be able to comprehend their relevant subject areas, research connections, or developments. Methods: This study aimed to assess the global publication output on oral hygiene to create a world map that provides background information on key players, trends, and incentives of research. For this purpose, established bibliometric parameters were combined with state-of-the-art visualization techniques. Results: This study shows the actual key players of research on oral hygiene in high-income economies with only marginal participation from lower economies. This still corresponds to the current burden situations, but they are more and more shifting to the disadvantage of the low-income countries. There is a clear North–South and West–East gradient, with the USA and the Western European nations being the most publishing nations on oral hygiene. As an emerging country, Brazil plays a role in the research. Conclusions: The scientific power players were concentrated in high-income countries. However, the changing epidemiological situation requires a different scientific approach to oral hygiene. This requires an expansion of the international network to meet the demands of future global oral health burdens, which are mainly related to oral hygiene.
Regeneration of large bone defects is a major objective in trauma surgery. Bone marrow mononuclear cell (BMC)-supported bone healing was shown to be efficient after immobilization on a scaffold. We hypothesized that fibrous demineralized bone matrix (DBM) in various forms with BMCs is superior to granular DBM. A total of 65 male SD rats were assigned to five treatment groups: syngenic cancellous bone (SCB), fibrous demineralized bone matrix (f-DBM), fibrous demineralized bone matrix densely packed (f-DBM 120%), DBM granules (GDBM) and DBM granules 5% calcium phosphate (GDBM5%Ca2+). BMCs from donor rats were combined with different scaffolds and placed into 5 mm femoral bone defects. After 8 weeks, bone mineral density (BMD), biomechanical stability and histology were assessed. Similar biomechanical properties of f-DBM and SCB defects were observed. Similar bone and cartilage formation was found in all groups, but a significantly bigger residual defect size was found in GDBM. High bone healing scores were found in f-DBM (25) and SCB (25). The application of DBM in fiber form combined with the application of BMCs shows promising results comparable to the gold standard, syngenic cancellous bone. Denser packing of fibers or higher amount of calcium phosphate has no positive effect.
While the importance of the iron-load of lipocalin-2 (Lcn-2) in promoting tumor progression is widely appreciated, underlying molecular mechanisms largely remain elusive. Considering its role as an iron-transporter, we aimed at clarifying iron-loaded, holo-Lcn-2 (hLcn-2)-dependent signaling pathways in affecting renal cancer cell viability. Applying RNA sequencing analysis in renal CAKI1 tumor cells to explore highly upregulated molecular signatures in response to hLcn-2, we identified a cluster of genes (SLC7A11, GCLM, GLS), which are implicated in regulating ferroptosis. Indeed, hLcn-2-stimulated cells are protected from erastin-induced ferroptosis. We also noticed a rapid increase in reactive oxygen species (ROS) with subsequent activation of the antioxidant Nrf2 pathway. However, knocking down Nrf2 by siRNA was not sufficient to induce erastin-dependent ferroptotic cell death in hLcn-2-stimulated tumor cells. In contrast, preventing oxidative stress through N-acetyl-l-cysteine (NAC) supplementation was still able to induce erastin-dependent ferroptotic cell death in hLcn-2-stimulated tumor cells. Besides an oxidative stress response, we noticed activation of the integrated stress response (ISR), shown by enhanced phosphorylation of eIF-2α and induction of ATF4 after hLcn-2 addition. ATF4 knockdown as well as inhibition of the ISR sensitized hLcn-2-treated renal tumor cells to ferroptosis, thus linking the ISR to pro-tumor characteristics of hLcn-2. Our study provides mechanistic details to better understand tumor pro-survival pathways initiated by iron-loaded Lcn-2.
Background: The impact of MRI-lesion targeted (TB) and systematic biopsy (SB) Gleason score (GS) as a predictor for final pathological GS still remains unclear. Methods: All patients with TB + SB, and subsequent radical prostatectomy (RP) between 01/2014-12/2020 were analyzed. Rank correlation coefficient predicted concordance with pathological GS for patients’ TB and SB GS, as well as for the combined effect of SB + TB. Results: Of 159 eligible patients, 77% were biopsy naïve. For SB taken in addition to TB, a Spearman’s correlation of +0.33 was observed regarding final GS. Rates of concordance, upgrading, and downgrading were 37.1, 37.1 and 25.8%, respectively. For TB, a +0.52 correlation was computed regarding final GS. Rates of concordance, upgrading and downgrading for TB biopsy GS were 45.9, 33.3, and 20.8%, respectively. For the combination of SB + TB, a correlation of +0.59 was observed. Rates of concordance, upgrading and downgrading were 49.7, 15.1 and 35.2%, respectively. The combined effect of SB + TB resulted in a lower upgrading rate, relative to TB and SB (both p < 0.001), but a higher downgrading rate, relative to TB (p < 0.01). Conclusions: GS obtained from TB provided higher concordance and lower upgrading and downgrading rates, relative to SB GS with regard to final pathology. The combined effect of SB + TB led to the highest concordance rate and the lowest upgrading rate.
Efferocytosis is critical for tissue homeostasis, as its deregulation is associated with several autoimmune pathologies. While engulfing apoptotic cells, phagocytes activate transcription factors, such as peroxisome proliferator-activated receptors (PPAR) or liver X receptors (LXR) that orchestrate metabolic, phagocytic, and inflammatory responses towards the ingested material. Coordination of these transcription factors in efferocytotic human macrophages is not fully understood. In this study, we evaluated the transcriptional profile of macrophages following the uptake of apoptotic Jurkat T cells using RNA-seq analysis. Results indicated upregulation of PPAR and LXR pathways but downregulation of sterol regulatory element-binding proteins (SREBP) target genes. Pharmacological inhibition and RNA interference pointed to LXR and PPARδ as relevant transcriptional regulators, while PPARγ did not substantially contribute to gene regulation. Mechanistically, lysosomal digestion and lysosomal acid lipase (LIPA) were required for PPAR and LXR activation, while PPARδ activation also demanded an active lysosomal phospholipase A2 (PLA2G15). Pharmacological interference with LXR signaling attenuated ABCA1-dependent cholesterol efflux from efferocytotic macrophages, but suppression of inflammatory responses following efferocytosis occurred independently of LXR and PPARδ. These data provide mechanistic details on LXR and PPARδ activation in efferocytotic human macrophages.
Oxaliplatin is a third-generation platinum-based anticancer drug that is widely used as first-line treatment for colorectal carcinoma. Patients treated with oxaliplatin develop an acute peripheral pain several hours after treatment, mostly characterized by cold allodynia as well as a long-term chronic neuropathy. These two phenomena seem to be causally connected. However, the underlying mechanisms that trigger the acute peripheral pain are still poorly understood. Here we show that the activity of the transient receptor potential melastatin 8 (TRPM8) channel but not the activity of any other member of the TRP channel family is transiently increased 1 h after oxaliplatin treatment and decreased 24 h after oxaliplatin treatment. Mechanistically, this is connected with activation of the phospholipase C (PLC) pathway and depletion of phosphatidylinositol 4,5-bisphosphate (PIP2) after oxaliplatin treatment. Inhibition of the PLC pathway can reverse the decreased TRPM8 activity as well as the decreased PIP2-concentrations after oxaliplatin treatment. In summary, these results point out transient changes in TRPM8 activity early after oxaliplatin treatment and a later occurring TRPM8 channel desensitization in primary sensory neurons. These mechanisms may explain the transient cold allodynia after oxaliplatin treatment and highlight an important role of TRPM8 in oxaliplatin-induced acute and neuropathic pain.
NADH:ubiquinone-oxidoreductase (complex I) is the largest membrane protein complex of the respiratory chain. Complex I couples electron transfer to vectorial proton translocation across the inner mitochondrial membrane. The L shaped structure of complex I is divided into a membrane arm and a matrix arm. Fourteen central subunits are conserved throughout species, while some 30 accessory subunits are typically found in eukaryotes. Complex I dysfunction is associated with mutations in the nuclear and mitochondrial genome, resulting in a broad spectrum of neuromuscular and neurodegenerative diseases. Accessory subunit NDUFS4 in the matrix arm is a hot spot for mutations causing Leigh or Leigh-like syndrome. In this review, we focus on accessory subunits of the matrix arm and discuss recent reports on the function of accessory subunit NDUFS4 and its interplay with NDUFS6, NDUFA12, and assembly factor NDUFAF2 in complex I assembly.
Sprouting of surviving axons is one of the major reorganization mechanisms of the injured brain contributing to a partial restoration of function. Of note, sprouting is maturation as well as age-dependent and strong in juvenile brains, moderate in adult and weak in aged brains. We have established a model system of complex organotypic tissue cultures to study sprouting in the dentate gyrus following entorhinal denervation. Entorhinal denervation performed after 2 weeks postnatally resulted in a robust, rapid, and very extensive sprouting response of commissural/associational fibers, which could be visualized using calretinin as an axonal marker. In the present study, we analyzed the effect of maturation on this form of sprouting and compared cultures denervated at 2 weeks postnatally with cultures denervated at 4 weeks postnatally. Calretinin immunofluorescence labeling as well as time-lapse imaging of virally-labeled (AAV2- hSyn1-GFP) commissural axons was employed to study the sprouting response in aged cultures. Compared to the young cultures commissural/associational sprouting was attenuated and showed a pattern similar to the one following entorhinal denervation in adult animals in vivo. We conclude that a maturation-dependent attenuation of sprouting occurs also in vitro, which now offers the chance to study, understand and influence maturation-dependent differences in brain repair in these culture preparations.
OXA-48-like carbapenemases are among the most frequent carbapenemases in Gram-negative Enterobacterales worldwide with the highest prevalence in the Middle East, North Africa and Europe. Here, we investigated the so far uncharacterized carbapenemase OXA-484 from a clinical E. coli isolate belonging to the high-risk clone ST410 regarding antibiotic resistance pattern, horizontal gene transfer (HGT) and genetic support. OXA-484 differs by the amino acid substitution 214G compared to the most closely related variants OXA-181 (214R) and OXA-232 (214S). The blaOXA–484 was carried on a self-transmissible 51.5 kb IncX3 plasmid (pOXA-484) showing high sequence similarity with plasmids harboring blaOXA–181. Intraspecies and intergenus HGT of pOXA-484 to different recipients occurred at low frequencies of 1.4 × 10–7 to 2.1 × 10–6. OXA-484 increased MICs of temocillin and carbapenems similar to OXA-232 and OXA-244, but lower compared with OXA-48 and OXA-181. Hence, OXA-484 combines properties of OXA-181-like plasmid support and transferability as well as β-lactamase activity of OXA-232.
SUMO : glue or solvent for phase-separated ribonucleoprotein complexes and molecular condensates?
(2021)
Spatial organization of cellular processes in membranous or membrane-less organelles (MLOs, alias molecular condensates) is a key concept for compartmentalizing biochemical pathways. Prime examples of MLOs are the nucleolus, PML nuclear bodies, nuclear splicing speckles or cytosolic stress granules. They all represent distinct sub- cellular structures typically enriched in intrinsically disordered proteins and/or RNA and are formed in a process driven by liquid-liquid phase separation. Several MLOs are critically involved in proteostasis and their formation, disassembly and composition are highly sensitive to proteotoxic insults. Changes in the dynamics of MLOs are a major driver of cell dysfunction and disease. There is growing evidence that post-translational modifications are critically involved in controlling the dynamics and composition of MLOs and recent evidence supports an important role of the ubiquitin-like SUMO system in regulating both the assembly and disassembly of these structures. Here we will review our current understanding of SUMO function in MLO dynamics under both normal and pathological conditions.
NADH: ubiquinone oxidoreductase (complex I) is the first enzyme complex of the respiratory chain. Complex I is a redox-driven proton pump that contributes to the proton motive force that drives ATP synthase. The structure of complex I has been analyzed by x-ray crystallography and electron cryo-microscopy and is now well-described. The ubiquinone (Q) reduction site of complex I is buried in the peripheral arm and a tunnel-like structure is thought to provide access for the hydrophobic substrate from the membrane. Several intermediate binding positions for Q in the tunnel were identified in molecular simulations. Structural data showed the binding of native Q molecules and short chain analogs and inhibitors in the access pathway and in the Q reduction site, respectively. We here review the current knowledge on the interaction of complex I with Q and discuss recent hypothetical models for the coupling mechanism.
Hintergrund: Patienten, die präoperativ an einer eisendefizitären Erythropoese (IDE) oder Anämie leiden, haben unabhängig von anderen Erkrankungen ein erhöhtes Risiko für postoperative Morbidität. Ein Eisenmangel ist der häufigste Grund für eine Anämie und kann, wenn er frühzeitig diagnostiziert wird, effizient mittels Eisensubstitution behandelt werden. Zink-Protoporphyrin (ZnPP) ist im Vergleich zu klassischen Parametern wie Ferritin ein vielversprechender Parameter, um eine IDE zu diagnostizieren. Bisher wurde der Parameter im Blut gemessen. Nun soll geprüft werden, ob eine nicht-invasive Messung valide Ergebnisse liefert.
Methoden: Von März 2017 bis April 2018 wurden am Universitätsklinikum Frankfurt Patienten, die für eine Operation mit einem erwarteten Blutverlust von >10% geplant waren, auf eine IDE untersucht. Die Messung von nicht-invasivem ZnPP (ZnPP-NI) wurde mit der ZnPP-Referenz-Messung des ZnPP/Häm-Verhältnisses mittels Hochleistungsflüssigchromatographie (ZnPP-HPLC) verglichen. Die analytische Performance beim Nachweis einer IDE wurde mit im Blut gemessenen klassischen Eisenstatusparameter (Ferritin, Transferrinsättigung [TSAT], löslicher Transferrinrezeptor [sTfR] und sTfR-Index [sTfR-F]) verglichen.
Ergebnis: In dieser prospektiven Studie konnten 285 chirurgische Patienten präoperativ untersucht werden. Die Limits of Agreement zwischen ZnPP-NI und ZnPP-HPLC betrugen 20,3 μmol/mol Häm (95% -Konfidenzintervall 18,0-21,3; Akzeptanzkriterien 24,4 μmol/mol Häm; absolute Bias -0,3 μmol/mol Häm). Die analytische Performance zum Nachweis einer IDE der im Blut gemessenen Parameter war: ZnPP-HPLC (0,95), sTfR (0,90), sTfR-F (0,89), ZnPP-NI (0,88), TSAT (0,87) und Ferritin (0,65).
Fazit: Beim Nachweis einer IDE ist ZnPP-NI besser geeignet als Ferritin und vergleichbar valide wie TSAT. Der Vergleich mit einem Multiparameter-Index-Test ergab, dass ZnPP-NI von ≤40 μmol/mol Häm den Ausschluss einer IDE ermöglicht und ein Wert von ≥65 μmol/mol Häm eine IDE wahrscheinlich macht. ZnPP-NI kann daher für eine schnelle Erstbewertung in der IDE-Diagnostik und im Anämie Management ohne Blutentnahme verwendet werden.
Objectives: Rising prevalence of multidrug-resistant organisms (MDRO) is a major health problem in patients with liver cirrhosis. The impact of MDRO colonization in liver transplantation (LT) candidates and recipients on mortality has not been determined in detail.
Methods: Patients consecutively evaluated and listed for LT in a tertiary German liver transplant center from 2008 to 2018 underwent screening for MDRO colonization including methicillin-resistant Staphylococcus aureus (MRSA), multidrug-resistant gram-negative bacteria (MDRGN), and vancomycin-resistant enterococci (VRE). MDRO colonization and infection status were obtained at LT evaluation, planned and unplanned hospitalization, three months upon graft allocation, or at last follow-up on the waiting list.
Results: In total, 351 patients were listed for LT, of whom 164 (47%) underwent LT after a median of 249 (range 0–1662) days. Incidence of MDRO colonization increased during waiting time for LT, and MRDO colonization was associated with increased mortality on the waiting list (HR = 2.57, p<0.0001. One patients was colonized with a carbapenem-resistant strain at listing, 9 patients acquired carbapenem-resistant gram-negative bacteria (CRGN) on the waiting list, and 4 more after LT. In total, 10 of these 14 patients died.
Conclusions: Colonization with MDRO is associated with increased mortality on the waiting list, but not in short-term follow-up after LT. Moreover, colonization with CRGN seems associated with high mortality in liver transplant candidates and recipients.
The C-type lectin-like receptor NKG2D contributes to the immunosurveillance of virally infected and malignant cells by cytotoxic lymphocytes. A peculiar and puzzling feature of the NKG2D-based immunorecognition system is the high number of ligands for this single immunoreceptor. In humans, there are a total of eight NKG2D ligands (NKG2DL) comprising two members of the MIC (MICA, MICB) and six members of the ULBP family of glycoproteins (ULBP1 to ULBP6). While MICA has been extensively studied with regard to its biochemistry, cellular expression and function, very little is known about the NKG2DL ULBP4. This is, at least in part, due to its rather restricted expression by very few cell lines and tissues. Recently, constitutive ULBP4 expression by human monocytes was reported, questioning the view of tissue-restricted ULBP4 expression. Here, we scrutinized ULBP4 expression by human peripheral blood mononuclear cells and monocytes by analyzing ULBP4 transcripts and ULBP4 surface expression. In contrast to MICA, there was no ULBP4 expression detectable, neither by freshly isolated monocytes nor by PAMP-activated monocytes. However, a commercial antibody erroneously indicated surface ULBP4 on monocytes due to a non-ULBP4-specific binding activity, emphasizing the critical importance of validated reagents for life sciences. Collectively, our data show that ULBP4 is not expressed by monocytes, and likely also not by other peripheral blood immune cells, and therefore exhibits an expression pattern rather distinct from other human NKG2DL.
Meningioma surgery in patients ≥70 years of age: clinical outcome and validation of the SKALE score
(2021)
Along with increasing average life expectancy, the number of elderly meningioma patients has grown proportionally. Our aim was to evaluate whether these specific patients benefit from surgery and to investigate a previously published score for decision-making in meningioma patients (SKALE). Of 421 patients who underwent primary intracranial meningioma resection between 2009 and 2015, 71 patients were ≥70 years of age. We compared clinical data including World Health Organization (WHO) grade, MIB-1 proliferation index, Karnofsky Performance Status Scale (KPS), progression free survival (PFS) and mortality rate between elderly and all other meningioma patients. Preoperative SKALE scores (Sex, KPS, ASA score, location and edema) were determined for elderly patients. SKALE ≥8 was set for dichotomization to determine any association with outcome parameters. In 71 elderly patients (male/female 37/34) all data were available. Postoperative KPS was significantly lower in elderly patients (p < 0.0001). Pulmonary complications including pneumonia (10% vs. 3.2%; p = 0.0202) and pulmonary embolism (12.7% vs. 6%; p = 0.0209) occurred more frequently in our elderly cohort. Analyses of the Kaplan Meier curves revealed differences in three-month (5.6% vs. 0.3%; p = 0.0033), six-month (7% vs. 0.3%; p = 0.0006) and one-year mortality (8.5% vs. 0.3%; p < 0.0001) for elderly patients. Statistical analysis showed significant survival benefit in terms of one-year mortality for elderly patients with SKALE scores ≥8 (5.1 vs. 25%; p = 0.0479). According to our data, elderly meningioma patients face higher postoperative morbidity and mortality than younger patients. However, resection is reasonable for selected patients, particularly when reaching a SKALE score ≥ 8.
Inflammatory nontraumatic atlantoaxial rotatory subluxation (AAS) in children is an often-missed diagnosis, especially in the early stages of disease. Abscess formation and spinal cord compression are serious risks that call for immediate surgical attention. Neither radiographs nor non-enhanced computed tomography (CT) images sufficiently indicate inflammatory processes. Magnetic resonance imaging (MRI) allows a thorough evaluation of paraspinal soft tissues, joints, and ligaments. In addition, it can show evidence of vertebral distraction and spinal cord compression. After conducting a scoping review of the literature, along with scientific and practical considerations, we outlined a standardized pediatric MRI protocol for suspected inflammatory nontraumatic AAS. We recommend contrast-enhanced MRI as the primary diagnostic imaging modality in children with signs of torticollis in combination with nasopharyngeal inflammatory or ear nose and throat (ENT) surgical history.
Background: To evaluate the impact of time to castration resistance (TTCR) in metastatic hormone-sensitive prostate cancer (mHSPC) patients on overall survival (OS) in the era of combination therapies for mHSPC.
Material and Methods: Of 213 mHSPC patients diagnosed between 01/2013-12/2020 who subsequently developed metastatic castration resistant prostate cancer (mCRPC), 204 eligible patients were analyzed after having applied exclusion criteria. mHSPC patients were classified into TTCR <12, 12-18, 18-24, and >24 months and analyzed regarding OS. Moreover, further OS analyses were performed after having developed mCRPC status according to TTCR. Logistic regression models predicted the value of TTCR on OS.
Results: Median follow-up was 34 months. Among 204 mHSPC patients, 41.2% harbored TTCR <12 months, 18.1% for 12-18 months, 15.2% for 18-24 months, and 25.5% for >24 months. Median age was 67 years and median PSA at prostate cancer diagnosis was 61 ng/ml. No differences in patient characteristics were observed (all p>0.05). According to OS, TTCR <12 months patients had the worst OS, followed by TTCR 12-18 months, 18-24 months, and >24 months, in that order (p<0.001). After multivariable adjustment, a 4.07-, 3.31-, and 6.40-fold higher mortality was observed for TTCR 18-24 months, 12-18 months, and <12 months patients, relative to TTCR >24 months (all p<0.05). Conversely, OS after development of mCRPC was not influenced by TTCR stratification (all p>0.05).
Conclusion: Patients with TTCR <12 months are at the highest OS disadvantage in mHSPC. This OS disadvantage persisted even after multivariable adjustment. Interestingly, TTCR stratified analyses did not influence OS in mCRPC patients.
Background: The incidence of pyogenic spinal infection has increased in recent years. In addition to treatment of the spinal infection, early diagnosis and therapy of coexisting infections, especially of secondary brain infection, are important. The aim of this study is to elucidate the added value of routine cerebral imaging in the management of these patients.
Methods: This was a retrospective single-center study. Cerebral imaging consisting of cerebral magnetic resonance imaging (cMRI) was performed to detect brain infection in patients with a primary pyogenic spinal infection. Results: We analyzed a cohort of 61 patients undergoing cerebral imaging after diagnosis of primary pyogenic spinal infection. The mean age in this cohort was 68.7 years and the gender distribution consisted of 44 males and 17 females. Spinal epidural abscess was proven in 32 (52.4%) patients. Overall positive blood culture was obtained in 29 (47.5%) patients, infective endocarditis was detected in 23 (37.7%) patients and septic condition at admission was present in 12 (19.7%) Patients. Coexisting brain infection was detected in 2 (3.3%) patients. Both patients revealed clinical signs of severe sepsis, reduced level of consciousness (GCS score 3), were intubated, and died due to multi-organ failure. Conclusions: Brain infection in patients with spinal infection is very rare. Of 61 patients with pyogenic spinal infection, two patients had signs of cerebral infection shown by imaging, both of whom were in a coma (GCS 3), and sepsis.
The efficacy of statin-treatment in aneurysmal subarachnoid hemorrhage (SAH) remains controversial. We aimed to investigate the effects of statin-treatment in non-aneurysmal (na)SAH in accordance with animal research data illustrating the pathophysiology of naSAH. We systematically searched PubMed using PRISMA-guidelines and selected experimental studies assessing the statin-effect on SAH. Detecting the accordance of the applied experimental models with the pathophysiology of naSAH, we analyzed our institutional database of naSAH patients between 1999 and 2018, regarding the effect of statin treatment in these patients and creating a translational concept. Patient characteristics such as statin-treatment (simvastatin 40 mg/d), the occurrence of cerebral vasospasm (CVS), delayed infarction (DI), delayed cerebral ischemia (DCI), and clinical outcome were recorded. In our systematic review of experimental studies, we found 13 studies among 18 titles using blood-injection-animal-models to assess the statin-effect in accordance with the pathophysiology of naSAH. All selected studies differ on study-setting concerning drug-administration, evaluation methods, and neurological tests. Patients from the Back to Bedside project, including 293 naSAH-patients and 51 patients with simvastatin-treatment, were recruited for this analysis. Patients under treatment were affected by a significantly lower risk of CVS (p < 0.01; OR 3.7), DI (p < 0.05; OR 2.6), and DCI (p < 0.05; OR 3). Furthermore, there was a significant association between simvastatin-treatment and favorable-outcome (p < 0.05; OR 3). However, dividing patients with statin-treatment in pre-SAH (n = 31) and post-SAH (n = 20) treatment groups, we only detected a tenuously significant higher chance for a favorable outcome (p < 0.05; OR 0.05) in the small group of 20 patients with statin post-SAH treatment. Using a multivariate-analysis, we detected female gender (55%; p < 0.001; OR 4.9), Hunt&Hess ≤III at admission (p < 0.002; OR 4), no anticoagulant-therapy (p < 0.0001; OR 0.16), and statin-treatment (p < 0.0001; OR 24.2) as the main factors improving the clinical outcome. In conclusion, we detected a significantly lower risk for CVS, DCI, and DI in naSAH patients under statin treatment. Additionally, a significant association between statin treatment and favorable outcome 6 months after naSAH onset could be confirmed. Nevertheless, unified animal experiments should be considered to create the basis for developing new therapeutic schemes.
Purpose: To evaluate the prevalence and treatment patterns of speech and language disorders in Germany.
Methods: A retrospective analysis of data collected from 32% of the German population, insured by the statutory German health insurance (AOK, Local Health Care Funds). We used The International Statistical Classification of Diseases and Related Health Problems, 10th revision, German Modification (ICD-10 GM) codes for stuttering (F98.5), cluttering (F98.6), and developmental disorders of speech and language (F80) to identify prevalent and newly diagnosed cases each year. Prescription and speech therapy reimbursement data were used to evaluate treatment patterns.
Results: In 2017, 27,977 patients of all ages were diagnosed with stuttering (21,045 males, 75% and 6,932 females, 25%). Stuttering prevalence peaks at age 5 years (boys, 0.89% and girls, 0.40%). Cluttering was diagnosed in 1,800 patients of all ages (1,287 males, 71.5% and 513 females, 28.5%). Developmental disorders of speech and language were identified in 555,774 AOK-insurants (61.2% males and 38.8% females). Treatment data indicate a substantial proportion newly diagnosed stuttering individuals receive treatment (up to 45% of 6-year-old patients), with slightly fewer than 20 sessions per year, on average. We confirmed a previous study showing increased rates of atopic disorders and neurological and psychiatric comorbidities in individuals with stuttering, cluttering, and developmental disorders of speech and language.
Conclusion: This is the first nationwide study using health insurance data to analyze the prevalence and newly diagnosed cases of a speech and language disorder. Prevalence and gender ratio data were consistent with the international literature. The crude prevalence of developmental disorders of speech and language increased from 2015 to 2018, whereas the crude prevalence for stuttering remained stable. For cluttering, the numbers were too low to draw reliable conclusions. Proportional treatment allocation for stuttering peaked at 6 years of age, which is the school entrance year, and is later than the prevalence peak of stuttering.
Clinical speech perception tests with simple presentation conditions often overestimate the impact of signal preprocessing on speech perception in complex listening environments. A new procedure was developed to assess speech perception in interleaved acoustic environments of different complexity that allows investigation of the impact of an automatic scene classification (ASC) algorithm on speech perception. The procedure was applied in cohorts of normal hearing (NH) controls and uni- and bilateral cochlear implant (CI) users. Speech reception thresholds (SRTs) were measured by means of a matrix sentence test in five acoustic environments that included different noise conditions (amplitude modulated and continuous), two spatial configurations, and reverberation. The acoustic environments were encapsulated in a randomized, mixed order single experimental run. Acoustic room simulation was played back with a loudspeaker auralization setup with 128 loudspeakers. 18 NH, 16 unilateral, and 16 bilateral CI users participated. SRTs were evaluated for each individual acoustic environment and as mean-SRT. Mean-SRTs improved by 2.4 dB signal-to-noise ratio for unilateral and 1.3 dB signal-to-noise ratio for bilateral CI users with activated ASC. Without ASC, the mean-SRT of bilateral CI users was 3.7 dB better than the SRT of unilateral CI users. The mean-SRT indicated significant differences, with NH group performing best and unilateral CI users performing worse with a difference of up to 13 dB compared to NH. The proposed speech test procedure successfully demonstrated that speech perception and benefit with ASC depend on the acoustic environment.
Purpose: The extent of preoperative peritumoral edema in glioblastoma (GBM) has been negatively correlated with patient outcome. As several ongoing studies are investigating T-cell based immunotherapy in GBM, we conducted this study to assess whether peritumoral edema with potentially increased intracranial pressure, disrupted tissue homeostasis and reduced local blood flow has influence on immune infiltration and affects survival.
Methods: A volumetric analysis of preoperative imaging (gadolinium enhanced T1 weighted MRI sequences for tumor size and T2 weighted sequences for extent of edema (including the infiltrative zone, gliosis etc.) was conducted in 144 patients using the Brainlab® software. Immunohistochemical staining was analyzed for lymphocytic- (CD 3+) and myelocytic (CD15+) tumor infiltration. A retrospective analysis of patient-, surgical-, and molecular characteristics was performed using medical records.
Results: The edema to tumor ratio was neither associated with progression-free nor overall survival (p=0.90, p=0.74). However, GBM patients displaying IDH-1 wildtype had significantly higher edema to tumor ratio than patients displaying an IDH-1 mutation (p=0.01). Immunohistopathological analysis did not show significant differences in lymphocytic or myelocytic tumor infiltration (p=0.78, p=0.74) between these groups.
Conclusion: In our cohort, edema to tumor ratio had no significant correlation with immune infiltration and outcome. However, patients with an IDH-1wildtype GBM had a significantly higher edema to tumor ratio compared to their IDH-1 mutated peer group. Further studies are necessary to elucidate the underlying mechanisms.
Transcription factors (TFs) guide effector proteins like chromatin-modifying or -remodeling enzymes to distinct sites in the genome and thereby fulfill important early steps in translating the genome’s sequence information into the production of proteins or functional RNAs. TFs of the same family are often highly conserved in evolution, raising the question of how proteins with seemingly similar structure and DNA-binding properties can exert physiologically distinct functions or respond to context-specific extracellular cues. A good example is the TALE superclass of homeodomain-containing proteins. All TALE-homeodomain proteins share a characteristic, 63-amino acid long homeodomain and bind to similar sequence motifs. Yet, they frequently fulfill non-redundant functions even in domains of co-expression and are subject to regulation by different signaling pathways. Here we provide an overview of posttranslational modifications that are associated with murine and human TALE-homeodomain proteins and discuss their possible importance for the biology of these TFs.
Das Mammakarzinom ist die häufigste Krebserkrankung der Frau. Aufgrund der zu ver-zeichnenden steigenden Erkrankungs- als auch Überlebensraten werden stetig mehr Frauen mit der Diagnose Brustkrebs und ihren Folgen konfrontiert. Seit den 1990er Jah-ren wird eine kognitive Dysfunktion von Patientinnen nach Krebstherapie in der For-schung diskutiert, wobei die Hintergründe und Zusammenhänge dieses Phänomens bis heute strittig sind. Ziel dieser Arbeit ist die Untersuchung der kognitiven Leistungsfä-higkeit mit einem Fokus auf Aufmerksamkeitsleistungen vor und nach einer adjuvanten Krebstherapie. In diesem Zusammenhang soll besonders der Einfluss von psychischem Stress auf die Aufmerksamkeit und ferner auch die subjektive kognitive Leistungsfähig-keit von Brustkrebspatientinnen beleuchtet werden.
Dazu wurde die Aufmerksamkeitsfähigkeit von 20 Patientinnen, die in der Klinik für Frauenheilkunde und Geburtshilfe des Universitätsklinikums Frankfurt am Main ange-bunden waren, zu jeweils zwei Messzeitpunkten anhand einer neuropsychologischen Testbatterie (Trail-Making Test, NeuroCogFX) untersucht. Die erste Messung erfolgte vor Therapieeinleitung, eine zweite Messung nach Beendigung einer adjuvanten Krebs-therapie. Gleichzeitig wurden Werte zu Depressivität, Angst, krankheitsbezogener Le-bensqualität und der kognitiven Funktionsfähigkeit mittels verschiedener Fragebögen (HADS, EORTC-QLQ C30, EORTC-QLQ BR23) erhoben. Eine Kontrollgruppe von gesunden Probandinnen (N=13) wurde nach den gleichen Vorgaben untersucht.
30% der Patientinnen hatten eine kombinierte Chemotherapie erhalten, eine Radiatio war bei 70% und eine antihormonelle Therapie bei 75% erfolgt. Die Testungen der Pati-entinnen fanden im Mittel 12 (SD 15,4) Tage nach OP statt. Die T2-Messungen erfolg-ten im Mittel 10,3 (SD: 3,2) Monate nach den T1-Messungen für Patientinnen und 7,3 (SD: 1,8) Monate für Kontrollprobandinnen. Alter, IQ und Bildungsniveau waren zwi-schen beiden Gruppen gleich, Unterschiede zeigten sich hinsichtlich der BMI- Werte und der sportlichen Aktivität. Es zeigten sich weder zum ersten noch zum zweiten Messzeitpunkt signifikante Unterschiede der Aufmerksamkeitsleistungen zwischen Pati-entinnen und der Kontrollgruppe. Unterschiede fanden sich lediglich zwischen beiden Zeitpunkten in der einfachen Reaktionszeit mit schlechteren Testleistungen während T2 sowie im TMT Teil B mit besseren Ergebnissen während T2 für beide Gruppen. Hoch-signifikant unterschieden sich dagegen Patientinnen von der Kontrollgruppe mit schlechteren Werten hinsichtlich Angst und Depression, der Lebensqualität sowie der empfundenen kognitiven Funktionen. Dabei war keine signifikante Veränderung der Werte zwischen T1 und T2 messbar. Eine Korrelation zwischen aufmerksamkeitsbezo-genen Testleistungen und psychischem Stress bestand nicht, weiterhin fand sich kein Zusammenhang zwischen subjektiver kognitiver Leistungsfähigkeit und objektiven Testergebnissen. Hochsignifikant korrelierten dagegen schlechtere Werte der subjektiven kognitiven Fähigkeiten mit erhöhten Werten für Angst und Depression.
Auf Grundlage dieser Arbeit lässt sich kein relevanter Einfluss einer adjuvanten Krebs-therapie auf die Aufmerksamkeitsleistungen ableiten. Die Ergebnisse belegen aber signi-fikant erhöhte Werte für Depression und Angst von Brustkrebspatientinnen und den Einfluss von erhöhtem psychischem Stress auf die subjektive kognitive Funktionsfähig-keit. Diesbezüglich sollten zukünftige Behandlungsstrategien auch die subjektive kogni-tive Funktionsfähigkeit und in diesem Zusammenhang auch die spezifische Therapie von psychischem Stress in den Fokus rücken.
Die afrikanische Schlafkrankheit (HAT), übertragen durch die Tsetse Fliege und ausgelöst durch den einzelligen Parasit Trypanosoma brucei, wird vor über 100 Jahren entdeckt. Diese unbehandelt immer tödlich verlaufende Erkrankung zählt zu den Neglected Tropical Diseases. Es existiert keine Impfung und die Behandlung ist nebenwirkungsreich. Das weltweite Forschungsaufkommen zu diesem Thema wird von 1900 bis 2016 anhand von Metadaten untersucht, die aus dem Web of Science Core Collection (Clarivate Analytics) extrahiert wurden. Die 5079 Publikationen werden mittels bibliometrischer Parameter ausgewertet. Diese umfassen chronologische Publikationsparameter, Analysen der Länder, Institutionen, Autoren, Fachzeitschriften, Fachbereiche, Kooperationen und Geschlechterparität. Die Analyse zeigt ein aufkommendes Forschungsinteresse der Kolonialmächte Anfang des 20. Jahrhunderts in den okkupierten Koloniegebieten Afrikas. Zu dem Zeitpunkt als der Erreger entdeckt wird, grassiert eine Epidemie der Ost-und Westafrikanischen Schlafkrankheit. Mit Beginn des Ersten Weltkrieges brechen die Publikationszahlen ein. Erst ab den 1970ern steigen die Artikelzahlen kontinuierlich. Die Vernachlässigung der Erkrankung resultiert in einer Epidemie mit geschätzt 300.000 Fällen (1998). In den letzten Jahren verringerte sich die Anzahl der Neuinfektionen erheblich, im Jahr 2016 werden 2184 Fälle gemeldet. Zwischen 1964 und 2013 kommt es zu einer mehr als 11-fachen Steigerung der Publikationen. Ab 1980 nehmen die Zitierungen sprunghaft zu, wahrscheinlich konnten viele neue Erkenntnisse aufgrund der hohen Prävalenz gewonnen werden. Der meistzitierte und produktivste Fachbereich ist die Biochemistry and Molecular Biology. Der Anteil Pharmacology and Pharmacy nimmt kontinuierlich zu. Die Popularität könnte auf 2 Faktoren zurückgeführt werden, den steigenden Bedarf an neuen Medikamenten und den Einfluss der WHO. 2009 wird NECT als Kombinationstherapie zugelassen, 2018 folgt Fexinidazole. Das durchschnittliche Literaturverzeichnis vergrößert sich, ebenso die Forschungsgruppen, denn die durchschnittliche Autorenzahl steigt von 2,5 (1975) auf 8,03 (2014). Die Zahl der internationalen Kooperationsartikel wird innerhalb der letzten 30 Jahre versechsfacht. Die publikationsstärkste Nation ist die USA, gefolgt von
Großbritannien, weiteren westeuropäischen Staaten sowie Kenia und Nigeria. 36% der 25 produktivsten Länder sind afrikanische. Gemessen an ihren ökonomischen Daten ist die Forschungsleistung extrem hoch. Unter den 15 produktivsten Institutionen ist als einziges afrikanisches das International Livestock Research Institut (Nairobi) vertreten. Diese Forschungseinrichtung wird durch Stiftungen wie Wellcome Trust finanziell unterstützt, welche bei mehreren hundert Publikationen als Funding Agency dient. Zwei weitere außeruniversitäre Institutionen zählen zu den produktivsten: Das Center of Infectious Disease Research (USA) sowie das Institute of Tropical Medicine Antwerp (Belgien). Die zehn produktivsten Länderkooperationen finden innereuropäisch oder mit den USA statt, darunter existiert eine europäisch-afrikanische Kollaboration (ITM Antwerp, Ministry for für Public Health (DR Kongo)). Bei Analyse der europäisch-afrikanischen Kooperationen fällt auf, dass diese mit der ehemaligen Kolonialpolitik korrelieren könnten. Die meisten afrikanischen Nationen publizieren in Kooperationen, eine Ausnahme bildet Nigeria. Sie veröffentlichen nur 18,7% der Artikel in Zusammenarbeit. Sie sind das Land mit dem höchsten BIP der ausgewerteten afrikanischen Nationen. Der produktivste Autor ist E. Pays der an der Université Libre de Bruxelles forscht. Der meistzitierte Autor G.A.M. Cross von der Rockefeller University ist Verfasser von zwei der meistzitierten Artikel. Die erfolgreichsten Wissenschaftler stehen eher am Ende ihrer Karriere und fungieren meist als Letztautoren und als Leiter einer Einrichtung. Obwohl in den letzten Jahren eine zunehmende Geschlechterparität auf dem Forschungsgebiet identifiziert werden konnte, ist die Chancengleichheit für Frauen abhängig vom Land. In Brasilien überwiegt als einzige Nation der Anteil weiblicher Autoren, während Japan den geringsten Frauenanteil besitzt. 11,2% der Artikel erscheinen in der Fachzeitschrift Molecular and Biochemical Parasitology und deckt somit die beiden meistzugewiesenen Themenfelder ab. Infektiöse Erkrankungen, die vor allem Drittweltländer mit geringen finanziellen Möglichkeiten betreffen, müssen im Interesse der Weltgemeinschaft weiter intensiv erforscht werden. Um dies zu ermöglichen ist eine Finanzierung und Stärkung der Wissenschaft in den betroffenen Ländern vor Ort nötig.
Chronic granulomatous disease (CGD) is a primary immunodeficiency, which is diagnosed in most patients between one and three years of age. Here we report on a boy who presented at birth with extensive skin lesions and lymphadenopathy which were caused by CGD. An analysis of the literature revealed 24 patients with CGD who became symptomatic during the first six weeks of life. Although pulmonary complications and skin lesions due to infection were the leading symptoms, clinical features were extremely heterogenous. As follow-up was not well specified in most patients, the long-term prognosis of children with very early onset of CGD remains unknown.
Aging is accompanied by unisensory decline. To compensate for this, two complementary strategies are potentially relied upon increasingly: first, older adults integrate more information from different sensory organs. Second, according to the predictive coding (PC) model, we form “templates” (internal models or “priors”) of the environment through our experiences. It is through increased life experience that older adults may rely more on these templates compared to younger adults. Multisensory integration and predictive coding would be effective strategies for the perception of near-threshold stimuli, which may however come at the cost of integrating irrelevant information. Both strategies can be studied in multisensory illusions because these require the integration of different sensory information, as well as an internal model of the world that can take precedence over sensory input. Here, we elicited a classic multisensory illusion, the sound-induced flash illusion, in younger (mean: 27 years, N = 25) and older (mean: 67 years, N = 28) adult participants while recording the magnetoencephalogram. Older adults perceived more illusions than younger adults. Older adults had increased pre-stimulus beta-band activity compared to younger adults as predicted by microcircuit theories of predictive coding, which suggest priors and predictions are linked to beta-band activity. Transfer entropy analysis and dynamic causal modeling of pre-stimulus magnetoencephalography data revealed a stronger illusion-related modulation of cross-modal connectivity from auditory to visual cortices in older compared to younger adults. We interpret this as the neural correlate of increased reliance on a cross-modal predictive template in older adults leading to the illusory percept.
Background: Polytraumatized patients undergo a strong immunological stress upon insult. Phagocytes (granulocytes and monocytes) play a substantial role in immunological defense against bacteria, fungi and yeast, and in the clearance of cellular debris after tissue injury. We have reported a reduced monocytes phagocytic activity early after porcine polytrauma before. However, it is unknown if both phagocyte types undergo those functional alterations, and if there is a pathogen-specific phagocytic behavior. We characterized the phagocytic activity and capacity of granulocytes and monocytes after polytrauma.
Methods: Eight pigs (Sus scrofa) underwent polytrauma consisting of lung contusion, liver laceration, tibial fracture and hemorrhagic shock with fluid resuscitation and fracture fixation with external fixator. Intensive care treatment including mechanical ventilation for 72 h followed. Phagocytic activity and capacity were investigated using an in vitro ex vivo whole blood stimulation phagocytosis assays before trauma, after surgery, 24, 48, and 72 h after trauma. Blood samples were stimulated with Phorbol-12-myristate-13-acetate and incubated with FITC-labeled E. coli, S. aureus or S. cerevisiae for phagocytosis assessment by flow cytometry.
Results: Early polytrauma-induced significant increase of granulocytes and monocytes declined to baseline values within 24 h. Percentage of E. coli-phagocytizing granulocytes significantly decreased after polytrauma and during further intensive care treatment, while their capacity significantly increased. Interestingly, both granulocytic phagocytic activity and capacity of S. aureus significantly decreased after trauma, although a recovery was observed after 24 h and yet was followed by another decrease. The percentage of S. cerevisiae-phagocytizing granulocytes significantly increased after 24 h, while their impaired capacity after surgery and 72 h later was detected. Monocytic E. coli-phagocytizing percentage did not change, while their capacity increased after 24–72 h. After a significant decrease in S. aureus-phagocytizing monocytes after surgery, a significant increase after 24 and 48 h was observed without capacity alterations. No significant changes in S. cerevisiae-phagocytizing monocytes occurred, but their capacity dropped 48 and 72 h.
Conclusion: Phagocytic activity and capacity of granulocytes and monocytes follow a different pattern and significantly change within 72 h after polytrauma. Both phagocytic activity and capacity show significantly different alterations depending on the pathogen strain, thus potentially indicating at certain and possibly more relevant infection causes after polytrauma.
The adult heart has a limited capacity to replace or regenerate damaged cardiac tissue following severe myocardial injury. Thus, therapies facilitating the induction of cardiac regeneration holds great promise for the treatment of end-stage heart failure, and for pathologies invoking severe cardiac dysfunction as a result of cardiomyocyte death. Recently, a number of studies have demonstrated that cardiac regeneration can be achieved through modulation and/or reprogramming of cardiomyocyte proliferation, differentiation, and survival signaling. Non-coding RNAs (ncRNAs), including microRNAs (miRNAs), long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs), are reported to play critical roles in regulating key aspects of cardiomyocyte physiologic and pathologic signaling, including the regulation of cardiac regeneration both in vitro and in vivo. In this review, we will explore and detail the current understanding of ncRNA function in cardiac regeneration, and highlight established and novel strategies for the treatment of heart failure through modulation of ncRNAs-driven cardiac regeneration.
Background: In clinical practice range of motion (RoM) is usually assessed with low-cost devices such as a tape measure (TM) or a digital inclinometer (DI). However, the intra- and inter-rater reliability of typical RoM tests differ, which impairs the evaluation of therapy progress. More objective and reliable kinematic data can be obtained with the inertial motion capture system (IMC) by Xsens. The aim of this study was to obtain the intra- and inter-rater reliability of the TM, DI and IMC methods in five RoM tests: modified Thomas test (DI), shoulder test modified after Janda (DI), retroflexion of the trunk modified after Janda (DI), lateral inclination (TM) and fingertip-to-floor test (TM).
Methods: Two raters executed the RoM tests (TM or DI) in a randomized order on 22 healthy individuals while, simultaneously, the IMC data (Xsens MVN) was collected. After 15 warm-up repetitions, each rater recorded five measurements.
Findings: Intra-rater reliabilities were (almost) perfect for tests in all three devices (ICCs 0.886–0.996). Inter-rater reliability was substantial to (almost) perfect in the DI (ICCs 0.71–0.87) and the IMC methods (ICCs 0.61–0.993) and (almost) perfect in the TM methods (ICCs 0.923–0.961). The measurement error (ME) for the tests measured in degree (°) was 0.9–3.3° for the DI methods and 0.5–1.2° for the IMC approaches. In the tests measured in centimeters the ME was 0.5–1.3cm for the TM methods and 0.6–2.7cm for the IMC methods. Pearson correlations between the results of the DI or the TM respectively with the IMC results were significant in all tests except for the shoulder test on the right body side (r = 0.41–0.81).
Interpretation: Measurement repetitions of either one or multiple trained raters can be considered reliable in all three devices.
Three AKT serine/threonine kinase isoforms (AKT1/AKT2/AKT3) mediate proliferation, metabolism, differentiation and anti-apoptotic signals. AKT isoforms are activated down- stream of PI3-kinase and also by PI3-kinase independent mechanisms. Mutations in the lipid phosphatase PTEN and PI3-kinase that increase PIP3 levels increase AKT signaling in a large proportion of human cancers. AKT and other AGC kinases possess a regulatory mechanism that relies on a conserved hydrophobic motif (HM) C-terminal to the catalytic core. In AKT, the HM is contiguous to the serine 473 and two other newly discovered (serine 477 and tyrosine 479) regulatory phosphorylation sites. In AKT genes, this regulatory HM region is encoded in the final exon. We identified a splice variant of AKT2 (AKT2-13a), which contains an alternative final exon and lacks the HM regulatory site. We validated the presence of mRNA for this AKT2-13a splice variant in different tissues, and the presence of AKT2-13a protein in extracts from HEK293 cells. When overexpressed in HEK293 cells, AKT2-13a is phosphorylated at the activation loop and at the zipper/turn motif phosphoryla- tion sites but has reduced specific activity. Analysis of the human transcriptome correspond- ing to other AGC kinases revealed that all three AKT isoforms express alternative transcripts lacking the HM regulatory motif, which was not the case for SGK1-3, S6K1-2, and classical, novel and atypical PKC isoforms. The transcripts of splice variants of Akt1-3 excluding the HM regulatory region could lead to expression of deregulated forms of AKT.
Objectives: Multidrug-resistant organisms (MDRO) are considered an emerging threat worldwide. Data covering the clinical impact of MDRO colonization in patients with solid malignancies, however, is widely missing. We sought to determine the impact of MDRO colonization in patients who have been diagnosed with Non-small cell lung cancer (NSCLC) who are at known high-risk for invasive infections.
Materials and methods: Patients who were screened for MDRO colonization within a 90-day period after NSCLC diagnosis of all stages were included in this single-center retrospective study.
Results: Two hundred and ninety-five patients were included of whom 24 patients (8.1%) were screened positive for MDRO colonization (MDROpos) at first diagnosis. Enterobacterales were by far the most frequent MDRO detected with a proportion of 79.2% (19/24). MDRO colonization was present across all disease stages and more present in patients with concomitant diabetes mellitus. Median overall survival was significantly inferior in the MDROpos study group with a median OS of 7.8 months (95% CI, 0.0–19.9 months) compared to a median OS of 23.9 months (95% CI, 17.6–30.1 months) in the MDROneg group in univariate (p = 0.036) and multivariate analysis (P = 0.02). Exploratory analyses suggest a higher rate of non-cancer-related-mortality in MDROpos patients compared to MDROneg patients (p = 0.002) with an increased rate of fatal infections in MDROpos patients (p = 0.0002).
Conclusions: MDRO colonization is an independent risk factor for inferior OS in patients diagnosed with NSCLC due to a higher rate of fatal infections. Empirical antibiotic treatment approaches should cover formerly detected MDR commensals in cases of (suspected) invasive infections.
Our aim was to evaluate the efficacy and toxicity of interstitial multicatheter high dose rate brachytherapy (imHDR- BRT) as accelerated partial breast irradiation (APBI) after second breast-conserving surgery (BCS) in patients with ipsilateral breast tumor recurrence (IBTR). Between January 2010 and December 2019, 20 patients with IBTR who refused salvage mastectomy (sMT) were treated with second BCS and post-operative imHDR-BRT as APBI. All patients had undergone primary BCS followed by adjuvant external beam radiotherapy. Median imHDR-BRT dose was 32 Gy delivered in twice-daily fractions of 4 Gy. Five-year IBTR-free survival, distant metastasis-free survival (DMFS), overall survival (OS) as well as toxicity and cosmesis were evaluated in the present retrospective analysis. Median age at recurrence and median time from the first diagnosis to IBTR was 65.1 years and 12.2 years, respectively. After a median follow-up of 69.9 months, two patients developed a second local recurrence resulting in 5-year IBTR free-survival of 86.8%. Five-year DMFS and 5-year OS were 84.6% and 92.3%, respectively. Grade 1–2 fibrosis was noted in 60% of the patients with no grade 3 or higher toxicity. Two (10%) cases of asymptomatic fat necrosis were documented. Cosmetic outcome was classified as excellent in 6 (37.5%), good in 6 (37.5%), fair in 3 (18.75%) and poor in 1 (6.25%) patient, respectively. We conclude that imHDR-BRT as APBI re-irradiation is effective and safe for IBTR and should be considered in appropriately selected patients.
The thymus hosts the development of a specific type of adaptive immune cells called T cells. T cells orchestrate the adaptive immune response through recognition of antigen by the highly variable T-cell receptor (TCR). T-cell development is a tightly coordinated process comprising lineage commitment, somatic recombination of Tcr gene loci and selection for functional, but non-self-reactive TCRs, all interspersed with massive proliferation and cell death. Thus, the thymus produces a pool of T cells throughout life capable of responding to virtually any exogenous attack while preserving the body through self-tolerance. The thymus has been of considerable interest to both immunologists and theoretical biologists due to its multi-scale quantitative properties, bridging molecular binding, population dynamics and polyclonal repertoire specificity. Here, we review experimental strategies aimed at revealing quantitative and dynamic properties of T-cell development and how they have been implemented in mathematical modeling strategies that were reported to help understand the flexible dynamics of the highly dividing and dying thymic cell populations. Furthermore, we summarize the current challenges to estimating in vivo cellular dynamics and to reaching a next- generation multi-scale picture of T-cell development.
Background: International travel is a major driver of the introduction and spread of SARS- CoV-2. Aim: To investigate SARS-CoV-2 genetic diversity in the region of a major transport hub in Germany, we characterized the viral sequence diversity of the SARS-CoV-2 variants circulating in Frankfurt am Main, the city with the largest airport in Germany, from the end of October to the end of December 2020. Methods: In total, we recovered 136 SARS-CoV-2 genomes from nasopharyngeal swab samples. We isolated 104 isolates that were grown in cell culture and RNA from the recovered viruses and subjected them to full-genome sequence analysis. In addition, 32 nasopharyngeal swab samples were directly sequenced. Results and conclusion: We found 28 different lineages of SARS- CoV-2 circulating during the study period, including the variant of concern B.1.1.7 (∆69/70, N501Y). Six of the lineages had not previously been observed in Germany. We detected the spike protein (S) deletion ∆69/∆70 in 15% of all sequences, a four base pair (bp) deletion (in 2.9% of sequences) and a single bp deletion (in 0.7% of sequences) in ORF3a, leading to ORF3a truncations. In four sequences (2.9%), an amino acid deletion at position 210 in S was identified. In a single sample (0.7%), both a 9 bp deletion in ORF1ab and a 7 bp deletion in ORF7a were identified. One sequence in lineage B.1.1.70 had an N501Y substitution while lacking the ∆69/70 in S. The high diversity of sequences observed over two months in Frankfurt am Main highlights the persisting need for continuous SARS-CoV-2 surveillance using full-genome sequencing, particularly in cities with international airport connections.
Macrophages supply iron to the breast tumor microenvironment by enforced secretion of lipocalin-2 (Lcn-2)-bound iron as well as the increased expression of the iron exporter ferroportin (FPN). We aimed at identifying the contribution of each pathway in supplying iron for the growing tumor, thereby fostering tumor progression. Analyzing the expression profiles of Lcn-2 and FPN using the spontaneous polyoma-middle-T oncogene (PyMT) breast cancer model as well as mining publicly available TCGA (The Cancer Genome Atlas) and GEO Series(GSE) datasets from the Gene Expression Omnibus database (GEO), we found no association between tumor parameters and Lcn-2 or FPN. However, stromal/macrophage-expression of Lcn-2 correlated with tumor onset, lung metastases, and recurrence, whereas FPN did not. While the total iron amount in wildtype and Lcn-2−/− PyMT tumors showed no difference, we observed that tumor-associated macrophages from Lcn-2−/− compared to wildtype tumors stored more iron. In contrast, Lcn-2−/− tumor cells accumulated less iron than their wildtype counterparts, translating into a low migratory and proliferative capacity of Lcn-2−/− tumor cells in a 3D tumor spheroid model in vitro. Our data suggest a pivotal role of Lcn-2 in tumor iron-management, affecting tumor growth. This study underscores the role of iron for tumor progression and the need for a better understanding of iron-targeted therapy approaches.
Background: Mesenchymal stromal cells (MSCs), multipotent progenitors that can be isolated from a variety of different tissues, are becoming increasingly important as cell therapeutics targeting immunopathologies and tissue regeneration. Current protocols for MSC isolation from bone marrow (BM) rely on density gradient centrifugation (DGC), and the production of sufficient MSC doses is a critical factor for conducting clinical MSC trials. Previously, a Good Manufacturing Practice (GMP)–compatible non-woven fabric filter device system to isolate MSCs was developed to increase the MSC yield from the BM. The aim of our study was to compare high-resolution phenotypic and functional characteristics of BM-MSCs isolated with this device and with standard DGC technology.
Methods: Human BM samples from 5 donors were analyzed. Each sample was divided equally, processing by DGC, and with the filter device. Stem cell content was assessed by quantification of colony-forming units fibroblasts (CFU-F). Immunophenotype was analyzed by multicolor flow cytometry. In vitro trilineage differentiation potential, trophic factors, and IDO-1 production were assessed. Functionally, immunomodulatory potential, wound healing, and angiogenesis were assayed in vitro.
Results: The CFU-F yield was 15-fold higher in the MSC preparations isolated with the device compared to those isolated by DGC. Consequently, the MSC yield that could be manufactured at passage 3 per mL collected BM was more than 10 times higher in the device group compared to DGC (1.65 × 109 vs. 1.45 × 108). The immunomodulatory potential and IDO-1 production showed donor-to-donor variabilities without differences between fabric filter-isolated and DGC-isolated MSCs. The results from the wound closure assays, the tube formation assays, and the trilineage differentiation assays were similar between the groups with respect to the isolation method. Sixty-four MSC subpopulations could be quantified with CD140a+CD119+CD146+ as most common phenotype group, and CD140a+CD119+CD146+MSCA-1–CD106–CD271– and CD140a+CD119+CD146–MSCA-1–CD106–CD271– as most frequent MSC subpopulations. As trophic factors hepatocyte growth factor, epidermal growth factor, brain-derived neurotrophic factor, angiopoietin-1, and vascular endothelial growth factor A could be detected in both groups with considerable variability between donors, but independent of the respective MSC isolation technique.
Conclusion: The isolation of MSCs using a GMP-compatible fabric filter system device resulted in higher yield of CFU-F, producing substantially more MSCs with similar subpopulation composition and functional characteristics as MSCs isolated by DGC.
Iron deficiency, with or without anemia, is the most frequent hematological manifestation in individuals with cancer, and is especially common in patients with colorectal cancer. Iron is a vital micronutrient that plays an essential role in many biological functions, in the context of which it has been found to be intimately linked to cancer biology. To date, however, whereas a large number of studies have comprehensively investigated and reviewed the effects of excess iron on cancer initiation and progression, potential interrelations of iron deficiency with cancer have been largely neglected and are not well-defined. Emerging evidence indicates that reduced iron intake and low systemic iron levels are associated with the pathogenesis of colorectal cancer, suggesting that optimal iron intake must be carefully balanced to avoid both iron deficiency and iron excess. Since iron is vital in the maintenance of immunological functions, insufficient iron availability may enhance oncogenicity by impairing immunosurveillance for neoplastic changes and potentially altering the tumor immune microenvironment. Data from clinical studies support these concepts, showing that iron deficiency is associated with inferior outcomes and reduced response to therapy in patients with colorectal cancer. Here, we elucidate cancer-related effects of iron deficiency, examine preclinical and clinical evidence of its role in tumorigenesis, cancer progression and treatment response. and highlight the importance of adequate iron supplementation to limit these outcomes.
Magnetic resonance imaging (MRI) is the gold standard imaging technique for diagnosis and monitoring of many neurological diseases. However, the application of conventional MRI in clinical routine is mainly limited to the visual detection of macroscopic tissue pathology since mixed tissue contrasts depending on hardware and protocol parameters hamper its application for the assessment of subtle or diffuse impairment of the structural tissue integrity. Multiparametric quantitative (q)MRI determines tissue parameters quantitatively, enabling the detection of microstructural processes related to tissue remodeling in aging and neurological diseases. In contrast to measuring tissue atrophy via structural imaging, multiparametric qMRI allows for investigating biologically distinct microstructural processes, which precede changes of the tissue volume. This facilitates a more comprehensive characterization of tissue alterations by revealing early impairment of the microstructural integrity and specific disease-related patterns. So far, qMRI techniques have been employed in a wide range of neurological diseases, including in particular conditions with inflammatory, cerebrovascular and neurodegenerative pathology. Numerous studies suggest that qMRI might add valuable information, including the detection of microstructural tissue damage in areas appearing normal on conventional MRI and unveiling the microstructural correlates of clinical manifestations. This review will give an overview of current qMRI techniques, the most relevant tissue parameters and potential applications in neurological diseases, such as early (differential) diagnosis, monitoring of disease progression, and evaluating effects of therapeutic interventions.
Radiotherapy is a frequently used treatment for prostate cancer. It does not only causes the intended damage to cancer cells, but also affects healthy surrounding tissue. As a result radiation-induced urethral strictures occur in 2.2% of prostate cancer patients. Management of urethral strictures is challenging due to the presence of poor vascularized tissue for reconstruction and the proximity of the sphincter, which can impair the functional outcome. This review provides a literature overview of risk factors, diagnostics and management of radiation-induced urethral strictures.
Cell-free therapy using extracellular vesicles (EVs) from adipose-derived mesenchymal stromal/stem cells (ASCs) seems to be a safe and effective therapeutic option to support tissue and organ regeneration. The application of EVs requires particles with a maximum regenerative capability and hypoxic culture conditions as an in vitro preconditioning regimen has been shown to alter the molecular composition of released EVs. Nevertheless, the EV cargo after hypoxic preconditioning has not yet been comprehensively examined. The aim of the present study was the characterization of EVs from hypoxic preconditioned ASCs. We investigated the EV proteome and their effects on renal tubular epithelial cells in vitro. While no effect of hypoxia was observed on the number of released EVs and their protein content, the cargo of the proteins was altered. Proteomic analysis showed 41 increased or decreased proteins, 11 in a statistically significant manner. Furthermore, the uptake of EVs in epithelial cells and a positive effect on oxidative stress in vitro were observed. In conclusion, culture of ASCs under hypoxic conditions was demonstrated to be a promising in vitro preconditioning regimen, which alters the protein cargo and increases the anti-oxidative potential of EVs. These properties may provide new potential therapeutic options for regenerative medicine.
Nucleoredoxin (NXN) is a redox regulator of Disheveled and thereby of WNT signaling. Deficiency in mice leads to cranial dysmorphisms and defects of heart, brain, and bone, suggesting defects of cell fate determination. We used shRNA-mediated knockdown of NXN in SH-SY5Y neuroblastoma cells to study its impact on neuronal cells. We expected that shNXN cells would easily succumb to redox stress, but there were no differences in viability on stimulation with hydrogen peroxide. Instead, the proliferation of naïve shNXN cells was increased with a higher rate of mitotic cells in cell cycle analyses. In addition, basal respiratory rates were higher, whereas the relative change in oxygen consumption upon mitochondrial stressors was similar to control cells. shNXN cells had an increased expression of redox-sensitive heat shock proteins, Hsc70/HSPA8 and HSP90, and autophagy markers suggested an increase in autophagosome formation upon stimulation with bafilomycin and higher flux under low dose rapamycin. A high rate of self-renewal, autophagy, and upregulation of redox-sensitive chaperones appears to be an attractive anti-aging combination if it were to occur in neurons in vivo for which SH-SY5Y cells are a model.
The incidence of invasive mold disease (IMD) has significantly increased over the last decades, and IMD of the central nervous system (CNS) is a particularly severe form of this infection. Solid data on the incidence of CNS IMD in the pediatric setting are lacking, in which Aspergillus spp. is the most prevalent pathogen, followed by mucorales. CNS IMD is difficult to diagnose, and although imaging tools such as magnetic resonance imaging have considerably improved, these techniques are still unspecific. As microscopy and culture have a low sensitivity, non-culture-based assays such as the detection of fungal antigens (e.g., galactomannan or beta-D-glucan) or the detection of fungal nucleic acids by molecular assays need to be validated in children with suspected CNS IMD. New and potent antifungal compounds helped to improve outcome of CNS IMD, but not all agents are approved for children and a pediatric dosage has not been established. Therefore, studies have to rapidly evaluate dosage, safety and efficacy of antifungal compounds in the pediatric setting. This review will summarize the current knowledge on diagnostic tools and on the management of CNS IMD with a focus on pediatric patients.
Osteoarthritis (OA) is a slow-progressing joint disease, leading to the degradation and remodeling of the cartilage extracellular matrix (ECM). The usually quiescent chondrocytes become reactivated and accumulate in cell clusters, become hypertrophic, and intensively produce not only degrading enzymes, but also ECM proteins, like the cartilage oligomeric matrix protein (COMP) and thrombospondin-4 (TSP-4). To date, the functional roles of these newly synthesized proteins in articular cartilage are still elusive. Therefore, we analyzed the involvement of both proteins in OA specific processes in in vitro studies, using porcine chondrocytes, isolated from femoral condyles. The effect of COMP and TSP-4 on chondrocyte migration was investigated in transwell assays and their potential to modulate the chondrocyte phenotype, protein synthesis and matrix formation by immunofluorescence staining and immunoblot. Our results demonstrate that COMP could attract chondrocytes and may contribute to a repopulation of damaged cartilage areas, while TSP-4 did not affect this process. In contrast, both proteins similarly promoted the synthesis and matrix formation of collagen II, IX, XII and proteoglycans, but inhibited that of collagen I and X, resulting in a stabilized chondrocyte phenotype. These data suggest that COMP and TSP-4 activate mechanisms to protect and repair the ECM in articular cartilage.
Bacterial and fungal toll-like receptor activation elicits type I IFN responses in mast cells
(2021)
Next to their role in IgE-mediated allergic diseases and in promoting inflammation, mast cells also have antiinflammatory functions. They release pro- as well as antiinflammatory mediators, depending on the biological setting. Here we aimed to better understand the role of mast cells during the resolution phase of a local inflammation induced with the Toll-like receptor (TLR)-2 agonist zymosan. Multiple sequential immunohistology combined with a statistical neighborhood analysis showed that mast cells are located in a predominantly antiinflammatory microenvironment during resolution of inflammation and that mast cell-deficiency causes decreased efferocytosis in the resolution phase. Accordingly, FACS analysis showed decreased phagocytosis of zymosan and neutrophils by macrophages in mast cell-deficient mice. mRNA sequencing using zymosan-induced bone marrow-derived mast cells (BMMC) revealed a strong type I interferon (IFN) response, which is known to enhance phagocytosis by macrophages. Both, zymosan and lipopolysaccharides (LPS) induced IFN-β synthesis in BMMCs in similar amounts as in bone marrow derived macrophages. IFN-β was expressed by mast cells in paws from naïve mice and during zymosan-induced inflammation. As described for macrophages the release of type I IFNs from mast cells depended on TLR internalization and endosome acidification. In conclusion, mast cells are able to produce several mediators including IFN-β, which are alone or in combination with each other able to regulate the phagocytotic activity of macrophages during resolution of inflammation.
The interaction of macrophages with apoptotic cells is required for efficient resolution of inflammation. While apoptotic cell removal prevents inflammation due to secondary necrosis, it also alters the macrophage phenotype to hinder further inflammatory reactions. The interaction between apoptotic cells and macrophages is often studied by chemical or biological induction of apoptosis, which may introduce artifacts by affecting the macrophages as well and/or triggering unrelated signaling pathways. Here, we set up a pure cell death system in which NIH 3T3 cells expressing dimerizable Caspase-8 were co-cultured with peritoneal macrophages in a transwell system. Phenotype changes in macrophages induced by apoptotic cells were evaluated by RNA sequencing, which revealed an unexpectedly dominant impact on macrophage proliferation. This was confirmed in functional assays with primary peritoneal macrophages and IC-21 macrophages. Moreover, inhibition of apoptosis during Zymosan-induced peritonitis in mice decreased mRNA levels of cell cycle mediators in peritoneal macrophages. Proliferation of macrophages in response to apoptotic cells may be important to increase macrophage numbers in order to allow efficient clearance and resolution of inflammation.
Simple Summary:
Pharmacological activation of tumor suppressor p53 is a promising therapeutic strategy for a range of hematologic and solid cancers. Whether p53 activation augments or suppresses anti-tumor innate immunity is less understood. Here we show that treatment of differentiating human macrophages with a p53 activator idasanutlin suppresses their inflammatory responses to activators of toll-like receptors (TLR) -4 and -7/8. This is accompanied by reduced expression of TLR7, TLR8, as well as TLR4 co-receptor CD14. These data help evaluating the possibilities of combining p53-targeting and immunostimulatory anti-cancer therapies.
Abstract:
The transcription factor p53 has well-recognized roles in regulating cell cycle, DNA damage repair, cell death, and metabolism. It is an important tumor suppressor and pharmacological activation of p53 by interrupting its interaction with the ubiquitin E3 ligase mouse double minute 2 homolog (MDM2) is actively explored for anti-tumor therapies. In immune cells, p53 modulates inflammatory responses, but the impact of p53 on macrophages remains incompletely understood. In this study, we used the MDM2 antagonist idasanutlin (RG7388) to investigate the responses of primary human macrophages to pharmacological p53 activation. Idasanutlin induced a robust p53-dependent transcriptional signature in macrophages, including several pro-apoptotic genes. However, idasanutlin did not generally sensitize macrophages to apoptosis, except for an enhanced response to a Fas-stimulating antibody. In fully differentiated macrophages, idasanutlin did not affect pro-inflammatory gene expression induced by toll-like receptor 4 (TLR4), TLR3, and TLR7/8 agonists, but inhibited interleukin-4-induced macrophage polarization. However, when present during monocyte to macrophage differentiation, idasanutlin attenuated inflammatory responses towards activation of TLR4 and TLR7/8 by low doses of lipopolysaccharide or resiquimod (R848). This was accompanied by a reduced expression of CD14, TLR7, and TLR8 in macrophages differentiated in the presence of idasanutlin. Our data suggest anti-inflammatory effects of pharmacological p53 activation in differentiating human macrophages.
The tumor-microenvironment (TME) is an amalgamation of various factors derived from malignant cells and infiltrating host cells, including cells of the immune system. One of the important factors of the TME is microRNAs (miRs) that regulate target gene expression at a post transcriptional level. MiRs have been found to be dysregulated in tumor as well as in stromal cells and they emerged as important regulators of tumorigenesis. In fact, miRs regulate almost all hallmarks of cancer, thus making them attractive tools and targets for novel anti-tumoral treatment strategies. Tumor to stroma cell cross-propagation of miRs to regulate protumoral functions has been a salient feature of the TME. MiRs can either act as tumor suppressors or oncogenes (oncomiRs) and both miR mimics as well as miR inhibitors (antimiRs) have been used in preclinical trials to alter cancer and stromal cell phenotypes. Owing to their cascading ability to regulate upstream target genes and their chemical nature, which allows specific pharmacological targeting, miRs are attractive targets for anti-tumor therapy. In this review, we cover a recent update on our understanding of dysregulated miRs in the TME and provide an overview of how these miRs are involved in current cancer-therapeutic approaches from bench to bedside.
Background: The prevalence of metabolic liver diseases is increasing and approved pharmacological treatments are still missing. Many animal models of nonalcoholic fatty liver disease (NAFLD) show a full spectrum of fibrosis, inflammation and steatosis, which does not reflect the human situation since only up to one third of the patients develop fibrosis and nonalcoholic steatohepatitis (NASH). Methods: Seven week old C57Bl/J mice were treated with ethanol, Western diet (WD) or both. The animals’ liver phenotypes were determined through histology, immunohistochemistry, Western blotting, hepatic triglyceride content and gene expression levels. In a human cohort of 80 patients stratified by current alcohol misuse and body mass index, liver histology and gene expression analysis were performed. Results: WD diet and ethanol-treated animals showed severe steatosis, with high hepatic triglyceride content and upregulation of fatty acid synthesis. Mild fibrosis was revealed using Sirius-red stains and gene expression levels of collagen. Inflammation was detected using histology, immunohistochemistry and upregulation of proinflammatory genes. The human cohort of obese drinkers showed similar upregulation in genes related to steatosis, fibrosis and inflammation. Conclusions: We provide a novel murine model for early-stage fatty liver disease suitable for drug testing and investigation of pathophysiology.
(1) Background: Dance teachers (DT) are dependent on their functional body. Pain can hardly be avoided during the professional practice of dance. Pain can become so intense that it impairs, or even prevents, the professional practice. The aim of this study was to identify the determinants of pain intensity of the most severely affected body regions of DT in pain during the three-month period prior to the survey. (2) Methods: This cross-sectional study was conducted by an online survey. A total of 166 DT participated in the study; 143 of the DT were in pain during the three-month period and were included in the analysis. Using multiple linear regression, the determinants of pain intensity were identified from population parameters, occupational data, pain localisation, and temporal pain course. (3) Results: Regions of the lower extremity and head/trunk regions were most frequently indicated as the body regions with the most severe pain. The multiple regression model generated with the factors “functional impairment”, “biomechanical exposure”, and “pain at rest” explains a statistically significant, moderate proportion of the variance in pain intensity (R2 = 0.22, F (3, 106) = 10.04, p < 0.001). (4) Conclusions: Intensity of pain in DT seems to be related to the physical demands of professional practice.
Resorbable synthetic scaffolds are promising for different indications, espe- cially in the context of bone regeneration. However, they require additional biological components to enhance their osteogenic potential. In addition to different cell types, autologous blood-derived matrices offer many advantages to enhance the regenerative capacity of biomaterials. The present study aimed to analyze whether biologization of a PCL-mesh coated using differently centrifuged Platelet rich fibrin (PRF) matrices will have a positive influence on primary human osteoblasts activity in vitro. A polymeric resorbable scaffold (Osteomesh, OsteoporeTM (OP), Singapore) was combined with differently centrifuged PRF matrices to evaluate the additional influence of this biologization concept on bone regeneration in vitro. Peripheral blood of three healthy donors was used to gain PRF matrices centrifuged either at High (710× g, 8 min) or Low (44× g, 8 min) relative centrifugal force (RCF) according to the low speed centrifugation concept (LSCC). OP-PRF constructs were cultured with pOBs. POBs cultured on the uncoated OP served as a control. After three and seven days of cultivation, cell culture supernatants were collected to analyze the pOBs activity by determining the concentrations of VEGF, TGF-β1, PDGF, OPG, IL-8, and ALP- activity. Immunofluorescence staining was used to evaluate the Osteopontin expression of pOBs. After three days, the group of OP+PRFLow+pOBs showed significantly higher expression of IL-8, TGF-ß1, PDGF, and VEGF compared to the group of OP+PRFHigh+pOBs and OP+pOBs. Similar results were observed on day 7. Moreover, OP+PRFLow+pOBs exhibited significantly higher activity of ALP compared to OP+PRFHigh+pOBs and OP+pOBs. Immunofluorescence staining showed a higher number of pOBs adherent to OP+PRFLow+pOBs compared to the groups OP+PRFHigh+pOBs and OP+pOBs. To the best of our knowledge, this study is the first to investigate the osteoblasts activity when cultured on a PRF-coated PCL-mesh in vitro. The presented results suggest that PRFLow centrifuged according to LSCC exhibits autologous blood cells and growth factors, seem to have a significant effect on osteogenesis. Thereby, the combination of OP with PRFLow showed promising results to support bone regeneration. Further in vivo studies are required to verify the results and carry out potential results for clinical translation.
Iron deficiency (ID) is a common manifestation of inflammatory bowel disease (IBD), arising primarily due to chronic inflammation and/or blood loss. There is no gold standard for ID diagnosis, which is often complicated by concomitant inflammation. Zinc protoporphyrin (ZnPP) correlates with parameters of iron homeostasis and has been identified as a promising marker for ID, irrespective of inflammation. We investigated the diagnostic performance of ZnPP in ID, iron deficiency anemia, anemia of chronic disease and mixed anemia in a cross-sectional study in 130 patients with IBD. Different parameters were compared by receiver operator characteristic (ROC) analysis as detectors of iron-restricted erythropoiesis (IRE). IRE was detected in 91 patients (70.0%); fifty-nine (64.8%) had absolute ID and 23 (25.4%) functional ID. When inflammation was present, ZnPP was a more reliable sole biomarker of IRE than MCV, transferrin saturation (TSAT) or ferritin (AUC; 0.855 vs. 0.763, 0.834% and 0.772, respectively). The specificity of TSAT was significantly lower than ZnPP when inflammation was present (38% vs. 71%, respectively). We conclude that ZnPP is a reliable biomarker of functional ID in patients with IBD and more dependable than ferritin or TSAT, which are influenced by chronic inflammation. We propose that ZnPP may also have utility in patients with other chronic diseases.
Objective: To investigate temporal trends in prostate cancer (PCa) radical prostatectomy (RP) candidates.
Materials and Methods: Patients who underwent RP for PCa between January 2014 and December 2019 were identified form our institutional database. Trend analysis and logistic regression models assessed RP trends after stratification of PCa patients according to D'Amico classification and Gleason score. Patients with neoadjuvant androgen deprivation or radiotherapy prior to RP were excluded from the analysis.
Results: Overall, 528 PCa patients that underwent RP were identified. Temporal trend analysis revealed a significant decrease in low-risk PCa patients from 17 to 9% (EAPC: −14.6%, p < 0.05) and GS6 PCa patients from 30 to 14% (EAPC: −17.6%, p < 0.01). This remained significant even after multivariable adjustment [low-risk PCa: (OR): 0.85, p < 0.05 and GS6 PCa: (OR): 0.79, p < 0.001]. Furthermore, a trend toward a higher proportion of intermediate-risk PCa undergoing RP was recorded.
Conclusion: Our results confirm that inverse stage migration represents an ongoing phenomenon in a contemporary RP cohort in a European tertiary care PCa center. Our results demonstrate a significant decrease in the proportion of low-risk and GS6 PCa undergoing RP and a trend toward a higher proportion of intermediate-risk PCa patients undergoing RP. This indicates a more precise patient selection when it comes to selecting suitable candidates for definite surgical treatment with RP.
Objective: To investigate the value of standard [digital rectal examination (DRE), PSA] and advanced (mpMRI, prostate biopsy) clinical evaluation for prostate cancer (PCa) detection in contemporary patients with clinical bladder outlet obstruction (BOO) scheduled for Holmium laser enucleation of the prostate (HoLEP).
Material and Methods: We retrospectively analyzed 397 patients, who were referred to our tertiary care laser center for HoLEP due to BOO between 11/2017 and 07/2020. Of those, 83 (20.7%) underwent further advanced clinical PCa evaluation with mpMRI and/or prostate biopsy due to elevated PSA and/or lowered PSA ratio and/or suspicious DRE. Logistic regression and binary regression tree models were applied to identify PCa in BOO patients.
Results: An mpMRI was conducted in 56 (66%) of 83 patients and revealed PIRADS 4/5 lesions in 14 (25%) patients. Subsequently, a combined systematic randomized and MRI-fusion biopsy was performed in 19 (23%) patients and revealed in PCa detection in four patients (5%). A randomized prostate biopsy was performed in 31 (37%) patients and revealed in PCa detection in three patients (4%). All seven patients (9%) with PCa detection underwent radical prostatectomy with 29% exhibiting non-organ confined disease. Incidental PCa after HoLEP (n = 76) was found in nine patients (12%) with advanced clinical PCa evaluation preoperatively. In univariable logistic regression analyses, PSA, fPSA ratio, and PSA density failed to identify patients with PCa detection. Conversely, patients with a lower International Prostate Symptom Score (IPSS) and PIRADs 4/5 lesion in mpMRI were at higher risk for PCa detection. In multivariable adjusted analyses, PIRADS 4/5 lesions were confirmed as an independent risk factor (OR 9.91, p = 0.04), while IPSS did not reach significance (p = 0.052).
Conclusion: In advanced clinical PCa evaluation mpMRI should be considered in patients with elevated total PSA or low fPSA ratio scheduled for BOO treatment with HoLEP. Patients with low IPSS or PIRADS 4/5 lesions in mpMRI are at highest risk for PCa detection. In patients with a history of two or more sets of negative prostate biopsies, advanced clinical PCa evaluation might be omitted.
Objective: Research on visual working memory has shown that individual stimulus features are processed in both specialized sensory regions and higher cortical areas. Much less evidence exists for auditory working memory. Here, a main distinction has been proposed between the processing of spatial and non-spatial sound features. Our aim was to examine feature-specific activation patterns in auditory working memory.
Methods: We collected fMRI data while 28 healthy adults performed an auditory delayed match-to-sample task. Stimuli were abstract sounds characterized by both spatial and non-spatial information, i.e., interaural time delay and central frequency, respectively. In separate recording blocks, subjects had to memorize either the spatial or non-spatial feature, which had to be compared with a probe sound presented after a short delay. We performed both univariate and multivariate comparisons between spatial and non-spatial task blocks.
Results: Processing of spatial sound features elicited a higher activity in a small cluster in the superior parietal lobe than did sound pattern processing, whereas there was no significant activation difference for the opposite contrast. The multivariate analysis was applied using a whole-brain searchlight approach to identify feature-selective processing. The task-relevant auditory feature could be decoded from multiple brain regions including the auditory cortex, posterior temporal cortex, middle occipital gyrus, and extended parietal and frontal regions.
Conclusion: In summary, the lack of large univariate activation differences between spatial and non-spatial processing could be attributable to the identical stimulation in both tasks. In contrast, the whole-brain multivariate analysis identified feature-specific activation patterns in widespread cortical regions. This suggests that areas beyond the auditory dorsal and ventral streams contribute to working memory processing of auditory stimulus features.
Cephalization is a major innovation of animal evolution and implies a synchronization of nervous system, mouth, and foregut polarization to align alimentary tract and sensomotoric system for effective foraging. However, the underlying integration of morphogenetic programs is poorly understood. Here, we show that invagination of neuroectoderm through de novo polarization and apical constriction creates the mouth opening in the Caenorhabditis elegans embryo. Simultaneously, all 18 juxta-oral sensory organ dendritic tips become symmetrically positioned around the mouth: While the two bilaterally symmetric amphid sensilla endings are towed to the mouth opening, labial and cephalic sensilla become positioned independently. Dendrite towing is enabled by the pre-polarized sensory amphid pores intercalating into the leading edge of the anteriorly migrating epidermal sheet, while apical constriction-mediated cell–cell re-arrangements mediate positioning of all other sensory organs. These two processes can be separated by gradual inactivation of the 26S proteasome activator, RPN-6.1. Moreover, RPN- 6.1 also shows a dose-dependent requirement for maintenance of coordinated apical polarization of other organs with apical lumen, the pharynx, and the intestine. Thus, our data unveil integration of morphogenetic programs during the coordination of alimentary tract and sensory organ formation and suggest that this process requires tight control of ubiquitin-dependent protein degradation.
Hintergrund: Die Tiefe Hirnstimulation ist eine etablierte Therapieoption zur Behandlung von Bewegungsstörungen. Um ein möglichst gutes Ansprechen bei geringen Nebenwirkungen zu erreichen, ist eine optimale Platzierung der Stimulationselektrode unverzichtbar. Für die Optimierung der Elektrodenposition wird in vielen Zentren eine Makrostimulation durchgeführt, die jedoch abhängig von der Mitarbeit des Patienten ist und eine Operation im Wachzustand erfordert.
Fragestellung: Ziel dieser Arbeit war es herauszufinden, ob die intraoperativ gemessenen Nebenwirkungsschwellen durch MEP oder Traktographie vorausgesagt werden können und eine Korrelation zur postoperativen Nebenwirkungsschwelle nachgewiesen werden kann.
Methoden: Eingeschlossen wurden die Daten von 42 Patienten, die sich einer Tiefen Hirnstimulation unterzogen hatten. Intraoperativ erfolge neben der Ableitung der Nebenwirkungsschwelle bei der Makrostimulation die Erfassung von MEP. Zusätzlich wurde eine Traktographie zur Darstellung der motorischen Faserbahnen durchgeführt, wobei auch die Daten der nTMS genutzt wurden. Anschließend erfolgte eine Abstandsmessung zwischen der Stimulationselektrode und der motorischen Faserbahn. Wenige Tage postoperativ wurden die Nebenwirkungsschwellen erneut im Rahmen der Ersteinstellung des Neurostimulators erhoben. Die Daten der intraoperativ gemessenen Nebenwirkungsschwelle wurden mit den Daten der MEP-Schwellenwerte, dem Faserbahnabstand und den postoperativen Schwellenwerten mittels einer linearen
Regressionsanalyse korreliert.
Ergebnisse: Eine Korrelation zwischen intraoperativer Nebenwirkungsschwelle und MEP konnte nicht nachgewiesen werden. Es ergab sich ein signifikanter Zusammenhang der Abstände der Stimulationselektrode zur motorischen Faserbahn. Die Korrelation mit den postoperativen Nebenwirkungsschwellen ergab einen signifikanten Zusammenhang.
Schlussfolgerung: Die intraoperativen Nebenwirkungsschwellen konnten durch MEP in dieser Studie nicht vorhergesagt werden. Jedoch kann die Traktographie die Makrostimulation ergänzen. Außerdem sollten die intraoperativ gemessenen Nebenwirkungsschwellen mit Vorsicht betrachtet werden, da diese zu einer Überschätzung des therapeutischen Fensters beitragen können.
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.
Kognitive Beeinträchtigungen (KB) sind ein häufiges Symptom bei Patienten mit Multipler Sklerose (MS). Diese führen im Alltags- und Berufsleben oft zu Einschränkungen. In der Standarddiagnostik der Multiplen Sklerose fehlt es aktuell an validierten, zeitsparenden, kostengünstigen sowie sprach- und bildungsunabhängigen Screening-Verfahren von KB. Ziel des Screenings ist es zu diskriminieren, welche Patienten einer ausführlichen neuropsychologischen Diagnostik unterzogen werden sollten. Als mögliche neue Screening-Verfahren wurden erstens die Sound-induced Flash Illusion (SiFI) als Paradigma multisensorischer Integration und zweitens das visuelle Suchverhalten anhand von Bildern natürlicher Umgebungen mit Hilfe der Technik des Eyetrackings (ET) verwendet.
Mittels SiFI wurden 39 Patienten mit schubförmiger (relapsing-remitting) MS (RRMS) und 16 primär- bzw. sekundär-progrediente (progressive) MS-Patienten (PMS) versus 40 gesunde Kontrollen (healthy controls, HC) auf eine verlängerte Perzeption der Illusion getestet. Im ET Versuch wurden 36 RRMS- und 12 PMS-Patienten versus 39 HC auf abweichende Fixationszeiten und Genauigkeiten untersucht. Um Zusammenhänge zwischen den Testleistungen der SiFI bzw. des ET und kognitiven Beeinträchtigungen herstellen zu können, wurde eine ausführliche neuropsychologische Testung durchgeführt.
Insgesamt nahmen MS-Patienten die Illusion der SiFI häufiger wahr als HC. Insbesondere PMS-Patienten erfuhren die Illusion bei großen Interstimulus-Intervallen signifikant öfter als HC. Zusätzlich ist bei MS-Patienten eine erhöhte Prädisposition, die Illusion der SiFI wahrzunehmen mit einem unterdurchschnittlichen Abschneiden in der neuropsychologischen Testung assoziiert. Des Weiteren ist die SiFI sprach- und bildungsunabhängig, kostengünstig und unterliegt bei Mehrfachtestung keiner Lerneffekte.
Beim ET zeigten MS-Patienten im Vergleich zu HC signifikant veränderte Fixationszeiten und reduzierte Genauigkeiten bei der Betrachtung von Bildern natürlicher Umgebungen. Beeinträchtigtes visuelles Suchverhalten war ein Prädiktor für eine verlangsamte Informationsverarbeitungsgeschwindigkeit in der neuropsychologischen Testung. Zudem konnte anhand der ET-Daten zwischen RRMS- und PMS-Patienten diskriminiert werden.
Zusammenfassend bestätigte die Studie, dass durch die SiFI erfasste multisensorische Integration und durch ET analysiertes visuelles Suchverhalten geeignet sind, um KB bei MS-Patienten zu screenen. Insbesondere lieferte die Testleistung der SiFI einen robusten Bezug zum Abschneiden in der neuropsychologischen Testung. Gleichzeitig war durch die Analyse von visuellem Suchverhalten eine Vorhersage über den Krankheitsprogress möglich. Diese Forschungsergebnisse liefern Evidenz, um beide Methoden nach ergänzender Forschungsarbeit potentiell in den klinischen Alltag integrieren zu können. Eine frühe Detektion von KB bei MS-Patienten ist von hoher Relevanz, um lange eine hohe Lebensqualität zu gewährleisten. Daher können Erkenntnisse dieser Studie genutzt werden, um den Krankheitsverlauf langfristig positiv zu beeinflussen.
Congenital diaphragmatic hernia (CDH) is a major congenital malformation with high mortality. Outcome data on larger unselected patient groups in Germany are unavailable as there is no registry for CDH. Therefore, routine data from the largest German health insurance fund were analyzed for the years 2009–2013. Main outcome measures were incidence, survival and length of hospital stay. Follow-up was 12 months. 285 patients were included. The incidence of CDH was 2.73 per 10,000 live births. Overall mortality was 30.2%. A total of 72.1% of the fatalities occurred before surgery. Highest mortality (64%) was noted in patients who were admitted to specialized care later as the first day of life. Patients receiving surgical repair had a better prognosis (mortality: 10.8%). A total of 67 patients (23.5%) were treated with ECMO with a mortality of 41.8%. The median cumulative hospital stay among one-year survivors was 40 days and differed between ECMO- and non-ECMO-treated patients (91 vs. 32.5 days, p < 0.001). This is the largest German cohort study of CDH patients with a one-year follow-up. The ECMO subgroup showed a higher mortality. Another important finding is that delayed treatment in specialized care increases mortality. Prospective clinical registries are needed to elucidate the treatment outcomes in detail.
Locator® and ball attachments are well-established systems to attach overdentures to two inter-foraminal implants. This study aimed to evaluate differences between the two systems regarding prosthetic maintenance and patients' oral-health-related quality of life (OHRQoL). Dental records of patients with a mandibular implant-retained overdenture were retrospectively analyzed. Prosthetic maintenance measures involving the denture suprastructure and attachment matrix and patrix were analyzed. Furthermore, the Oral Health Impact Profile-G14 (OHIP-G14) was used to evaluate OHRQoL. Results were analyzed by means of Kaplan–Meier analysis and Student's t- and log-rank tests. The records of 122 patients were evaluated. Kaplan–Meier survival analysis revealed a significant difference between ball attachments (Group B; n patients = 47) and Locator® attachments (Group L; n patients = 75) regarding the occurrence of denture fractures (p < 0.001) and events affecting the matrix (p = 0.028) and patrix (p = 0.030). Group L had a significantly lower total OHIP-G14 score than Group B (p = 0.002). The most common maintenance events were matrix-related and denture relining for both attachment systems. Group B required more maintenance measures than Group L. Moreover, patients in Group L had better OHRQoL than patients in Group B.
Hintergrund: Den derzeitigen Therapiestandard in der Behandlung des lokal begrenzten Prostatakarzinoms stellen die radikale Prostatektomie und perkutane Radiotherapie dar. Aufgrund der besonderen Strahlenbiologie des PCa (α-/β-Wert 1,5 Gy) ist von einer höheren Sensitivität gegenüber einer Hypofraktionierung auszugehen. Die aktuellen Literaturdaten zeigen eine Nichtunterlegenheit der moderaten Hypofraktionierung gegenüber dem konventionellen Regime, jedoch sind Langzeitergebnisse hinsichtlich der Spättoxizität noch spärlich. In dieser Arbeit werden onkologische Ergebnisse sowie GI-/ und GU-Toxizität nach moderat hypofraktionierter, intensitätsmodulierter (IMRT/VMAT) und bildgeführter (IGRT) Radiotherapie mit simultan integriertem Boost (SIB) in einem universitären Tumorzentrum untersucht.
Patienten und Methoden: In den Jahren 2010 bis 2016 wurden an der Uniklinik Frankfurt 170 Patienten mit histologisch gesichertem lokal begrenzten bis fortgeschrittenen PCa (T1-4, N0-1, M0) mittels moderat hypofraktionierter EBRT in IG-IMRT- bzw. IG-VMAT- und SIB-Technik behandelt. Alle Patienten wurden nach D’Amico-Klassifikation stratifiziert und risikoadaptiert therapiert. Die GI- und GU-Toxizität wurde gemäß CTC v4.0 wöchentlich unter der Therapie und während der Nachbeobachtungszeit erfasst. Ein biochemisches Rezidiv wurde definiert als PSA-Nadir + 2 ng/ml. Die Nachbeobachtung erfolgte 6-8 Wochen, 2-3 Monate und 6 Monate nach Radiotherapie sowie anschließend mindestens einmal jährlich. Die Datenauswertung erfolgte retrospektiv. Für die statistischen Analysen wurden die Software-Programme Excel und SPSS verwendet. Die Kaplan-Meier-Überlebensanalysen wurden mittels Log-Rank-Test verglichen und bei signifikanten Unterschieden in eine Cox-Regression-Analyse aufgenommen. Ein möglicher Zusammenhang zwischen dosimetrischen/klinischen Parametern und GI-/GU-Toxizität wurde mittels Chi-Quadrat-Test nach Pearson geprüft. Für alle durchgeführten Analysen galt ein p-Wert von <0,05 als statistisch signifikant. Ergebnisse: Patienten der low-risk- (n = 15) sowie intermediate- und high-risk-Gruppe mit Z.n. TURP (n= 14) erhielten eine GRD von 73,6 Gy für das PTV1 bzw. 58,24 Gy (PTV2) mit einer Einzeldosis von 2,3 Gy (SIB) bzw. 1,82 Gy in 32 Fraktionen. Patienten der intermediate- (n = 70) und high-risk- (n = 71) Gruppe erhielten eine GRD von 75,9 Gy (PTV1) bzw. 60,06 Gy (PTV2) mit einer Einzeldosis von 2,3 Gy (SIB) bzw. 1,82 Gy in 33 Fraktionen. Eine zusätzliche Bestrahlung des LAG (PTV3) mit einer GRD von 46,0 Gy und 1,84 Gy Einzeldosis in 25 Fraktionen erhielten alle Patienten mit radiologischer cN1-Situation bzw. im Falle eines LK-Befallsrisikos von >20% nach Roach-Formel (n = 86). Eine (neo-) adjuvante AHT erhielten insg. 98 Patienten. Die mediane Nachbeobachtungszeit betrug 36 Monate (Range: 5-84 Monate). Die 24-, 36-, und 60-Monate-ÜLR lagen in der IR-Gruppe bei 98,4%, 96,1% bzw. 89,7% (OS), 98,6% bzw. 94,9% (BC), 97% bzw. 84,5% (DFS) und 98,6% (FFM), in der HR-Gruppe bei 93,1% bzw. 88,8% (OS), 89%, 84,7% bzw. 75,3% (BC), 82,5%, 74,2% bzw. 65,9% (DFS) und 98%, 95,7% bzw. 84,8% (FFM). Weder für die AHT noch die RT des LAG konnte eine Verbesserung des OS, DFS, FFM sowie der BC gezeigt werden. Eine Akuttoxizität Grad 2 trat bei 6,5% (GI) bzw. 16,5% (GU) und Grad 3 bei 0,6% (GI) bzw. 0% (GU) auf. Eine Spättoxizität Grad 2 trat bei 2,9% (GI) bzw. 12,4% (GU) und Grad 3 bei 0,6% (GI) bzw. 1,2% (GU) auf.
Schlussfolgerung: Mit Implementierung der moderat hypofraktionierten EBRT nach o.g. Schema (73,6 Gy (79,9 Gy nach EQD2 (αβ 1,5)) bzw. 75,9 Gy (82,4 Gy nach EQD2 (αβ 1,5)) konnten im Rahmen dieser retrospektiven Kohortenstudie sehr gute Ergebnisse für intermediate- und high risk-Patienten des lokal begrenzten bis fortgeschrittenen PCa hinsichtlich der onkologischen Endpunkte sowie der GI-/GU-Toxizität, vergleichbar mit den besten Ergebnissen aktueller Publikationen, erzielt werden. Diese Ergebnisse bekräftigen die zunehmende Anwendung dieser Bestrahlungstechnik. Die Kohorte sollte zur Validierung der Ergebnisse weiter expandiert und mit einer längeren Nachbeobachtungszeit erneut ausgewertet werden.
Muskelskeletterkrankungen (MSE) sind die Hauptursache für Arbeitsunfähigkeit bei Büroangestellten in Deutschland. Die Produktionsausfallkosten für MSE beliefen sich im Jahre 2017 auf 17,2 Milliarden Euro. Neben haltungsbezogenen Risikofaktoren wie die statische Körperhaltung am Büroarbeitsplatz, konnten zunehmend psychische Stressoren wie Termin- und Leistungsdruck als Risikofaktoren identifiziert werden. Arbeitgeber versuchen mittels verhaltens- und verhältnispräventiven Maßnahmen im Rahmen der (BGF) am Arbeitsplatz zur Prävention beizutragen. Insbesondere Bewegungsprogramme führen nachweislich zu einer Verringerung von MSE und Stress sowie zu einer Verbesserung der Lebensqualität. Vielversprechend sind untere andrem auch Dehninterventionen wie die wenigen bislang veröffentlichten Studien zeigen. Das „five-Business“ Dehnprogramm, dass an einem Gerät durchgeführt wird, wurde speziell für die Anwendung im Büro konzipiert und beinhaltet fünf einfache Übungen für den Rumpf. Ziel dieser Studie war es daher, die Auswirkungen des "five-Business" Trainingsprogramms für Büroangestellte auf MSE, die Lebensqualität und die Beweglichkeit zu untersuchen.
Im Rahmen der hier vorgestellten Promotionsarbeit wurde zunächst eine konkrete Methode entwickelt (Publikation 1) und anschließend der Effekt dieses Dehntrainings auf die Lebensqualität untersucht (Publikation 2). Insgesamt nahmen 313 Büroangestellte (173m/137f) mit einem Durchschnittsalter von 43,37 ± 11,24 (SD) Jahren, einer Körpergröße von 175,37 ± 9,35 cm und einem Gewicht von 75,76 ± 15,23 kg sowie einem durchschnittlichen BMI von 24,5 ± 3,81 kg/m2 freiwillig an dieser Interventionskontrollstudie teil. Die 158 Teilnehmenden der Interventionsgruppe absolvierten das Dehntraining zweimal wöchentlich für etwa zehn Minuten über eine Dauer von 12 Wochen. Die Kontrollgruppe hingegen sollte ihrem gewöhnlichen Alltag weiter nachgehen. Der Short-Form-36 Fragebogen (SF-36) wurde verwendet, um die Effekte der Intervention zu Beginn und nach 12 Wochen auf die gesundheitsbezogene Lebensqualität zu evaluieren. Nach 12 Wochen Dehntraining traten signifikante Verbesserungen in den Bereichen mentaler Summenscore (p=0,008), körperliche Funktionsfähigkeit (p<0,001), körperliche Schmerzen (p=0,01), Vitalität (p=0,025), Rolleneinschränkungen aufgrund körperlicher Probleme (p=0,018) und psychische Gesundheit (p=0,012) auf. Die Ergebnisse zeigen, dass das Dehntraining nicht nur physische Gesundheitsparameter beeinflusst, sondern ebenfalls positive Effekte bei psychischen Gesundheitsparametern hervorruft. Das Dehntraining ermöglicht demnach sowohl auf physischer als auch auf psychischer Ebene eine Entspannung. Daher deuten die Ergebnisse insgesamt darauf hin, dass ein 12-wöchiges Dehnprogramm geeignet ist, die gesundheitsbezogene Lebensqualität von Büroangestellten zu verbessern. Es kann geschlussfolgert werden, dass ein solches Dehnprogramm als präventive und rehabilitative Maßnahme in der betrieblichen Gesundheitsförderung geeignet sein kann, um aktuelle Herausforderungen des zunehmenden Wettbewerbs und steigenden Produktivitätsanforderungen am Arbeitsplatz entgegenzuwirken.