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Institute
- Medizin (330) (remove)
Introduction: This study reports about antenatal characteristics of Roma minority population. The study was designed to investigate data about health behaviours known to be associated with reproductive outcomes of Roma women that have very good living conditions and relatively high resource availability.
Methods: A retrospective study included 204 Roma and 408 non-Roma hospitalised singleton births that occurred in the Maternity Ward of the General Hospital Virovitica in the period from 1991 to 2010. Data about women’s age, marital status, smoking, reproductive health (abortions, delivery), antenatal care, perinatal complications and gestational age were taken from hospital records and analysed.
Results: Roma women were averagely more than three years younger than non-Roma women, only 10.8% were married. Smoking was more frequent. The average number of births of Roma and non-Roma women was similar, averagely two children per woman. The rate of induced abortions in the Roma women was higher, while the frequency of spontaneous abortions was equal. Inadequate antenatal care of Roma women was associated with two times higher incidence of perinatal complications. A higher frequency of deliveries at home without professional assistance in Roma pregnancy resulted in lower perinatal outcomes. It was confirmed that Roma mothers give birth earlier (38+6 vs. 39+4 weeks) and have a higher incidence of premature births (9.3% vs. 2.2%).
Conclusions: In the comparison of antenatal parameters between the two researched groups, poorer prenatal outcomes in the Roma population were found, despite full integration and considerable improvement in living standards of this ethnic Roma population.
OBJECTIVE: To compare efficacy, safety, and tolerability of an oral enzyme combination (OEC) containing proteolytic enzymes and bioflavonoid vs diclofenac (DIC), a nonselective nonsteroidal anti-inflammatory drug in the treatment of osteoarthritis of the knee.
MATERIALS AND METHODS: This was an individual patient-level pooled reanalysis of patient-reported data from prospective, randomized, double-blind, parallel-group studies in adult patients with moderate-to-severe osteoarthritis of the knee treated for at least 3 weeks with OEC or DIC. Appropriate trials were identified with a systemic literature and database search. Data were extracted from the original case-report forms and reanalyzed by a blinded evaluation committee. The primary end point was the improvement of the Lequesne algofunctional index (LAFI) score at study end vs baseline. Secondary end points addressed LAFI response rates, treatment-related pain-intensity changes, adverse events, and laboratory parameters.
RESULTS: Six trials were identified that enrolled in total 774 patients, of whom 759 had post-baseline data for safety analysis, 697 (n=348/349 with OEC/DIC) for intent to treat, 524 for per protocol efficacy analysis, and 500 for laboratory evaluation. LAFI scores - the primary efficacy end point - decreased comparably with both treatments and improved with both treatments significantly vs baseline (OEC 12.6±2.4 to 9.1±3.9, DIC 12.7±2.4 to 9.1±4.2, effect size 0.9/0.88; P<0.001 for each). In parallel, movement-related 11-point numeric rating-scale pain intensity improved significantly (P<0.001) and comparably with both treatments from baseline (6.4±1.9/6.6±1.8) to study end (3.8±2.7/3.9±2.5). Overall, 55/81 OEC/DIC patients of the safety-analysis population (14.7%/21.1%, P=0.022) reported 90/133 treatment-emergent adverse events, followed by premature treatment discontinuations in 22/39 patients (5.9%/10.2%, P=0.030). Changes in laboratory parameters were significantly less with OEC vs DIC: on average 18.8% vs 86.3% of patients presented a decrease with respect to hemoglobin, hematocrit, or erythrocyte count (P<0.001), and 28.2% vs 72.6% showed an increase in AST, ALT, or GGT (P<0.001).
CONCLUSION: When compared with DIC, OEC showed comparable efficacy and a superior tolerability/safety profile associated with a significantly lower risk of treatment-emergent adverse events, related study discontinuations, and changes in laboratory parameters.
Alle lebenden Organismen sind in der Lage, sich an den re-gelmäßigen Wechsel von Licht und Dunkelheit und den zeitli-che Veränderungen im Takt der Jahreszeiten anzupassen. Die-se Synchronisierung der Aktivitäts- und Ruhephasen, sowie von physiologischen Stoffwechselprozessen an die vorgegebe-nen tageszeitlichen und saisonalen Zyklen findet beim Säu-getier in der inneren Uhr im Nucleus Suprachiasmaticus (SCN) statt. Das Licht, als wichtigster Zeitgeber für die Synchronisation der inneren Uhr, findet Eingang zum SCN über die Retina und den retinohypothalamischen Trakt (RTH), der Glutamat als Neurotransmitter nutzt. Ist dieses System fehlerhaft, führt dies zu Störung der oben beschriebenen Anpassungsprozesse. Dies hat eine gestörte Homöostase des Organismus zu Folge, aus denen sich wiederum Veränderungen im Tag/Nacht- Rhythmus, Schlafstörungen und depressive Ver-stimmungen ergeben können. Die genannten Symptome decken sich mit den Frühsymptomen den neurodegenerativen Erkran-kung Morbus Parkinson.
Ziel der vorliegenden Arbeit war es, Störungen im photoneu-roendokrinen System, insbesondere Veränderungen in der Re-tina an den photosensitiven Ganglienzellen mit dem Photo-pigment Melanopsin und dem SCN bei transgene Mäuse mit dem humanen alpha-Synuclein zu untersuchen. Hierbei wurden transgene Mäuse mit dem gesunden humanen alpha-Synuclein (Wildtyp) und transgene Mäuse mit der für Parkinson spezi-fischen Mutation im alpha-Synuclein Ala53Thr (A53T) vergli-chen.
Die immunochemischen Untersuchungen an Retina und SCN zei-gen einen signifikanten Anstieg der alpha-Synuclein Immun-reaktion bei der A53T Maus im Vergleich zum Wildtyp.
Parallel dazu wurden Unterschiede in Bezug auf das Photo-pigment Melanopsin zwischen den beiden Gruppen untersucht. Melanopsin ist lichtsensitiv und trägt, durch Übermittlung der aktuellen Lichtverhältnisse über den retinohypothalami-schen Trakt zum SCN, zur Synchronisation der circadianen Rhythmik bei. Durch den in dieser Arbeit nachgewiesene Me-lanopsindefizit und des deutlich reduzierten Vglut2 im hy-pothalamischen Trakt der A53T Maus lässt sich die Hypothese ableiten, dass möglicherweise die Überexpression des mu-tierten alpha-Synuclein in der Retina einen Untergang von melanopsinhaltigen Ganglienzellen herbeiführt und dadurch die Synchronisation der inneren Uhr durch Licht gestört ist. Diese Hypothese wird durch die Aktivitätsprofile ge-stützt, die durch die Aufzeichnung der lokomotorischen Ak-tivität der Tiere erstellt wurden.
Da in beiden Gruppen unter Dauerdunkel (DD) ein endogener zirkadianer Rhythmus beobachtet werden konnte, lässt dies auf die Funktionstüchtigkeit der inneren Uhr im SCN schlie-ßen. Im anschließenden Versuch die endogene Rhythmik an exogenen Reize anzupassen, zeigte sich bei dem A53T Stamm eine fehlende Synchronisierung an vorgegebene Lichtverhält-nisse mit gesteigerter Tagaktivität und reduzierten Schlaf-phasen. Somit trägt der fehlerhaft verarbeitete Lichtreiz bei A53T Mutanten zur Destabilisierung des zirkadianen Rhythmus der Lokomotion bei. Trotz des gestörten glutama-tergen Signalweges im retinohypothalamischen Trakt konnten keine Unterschiede in der Expression der Homerproteine zwi-schen Wildtyp und A53T unter Standard-Photoperiode und nach Schlafdeprivation nachgewiesen werden.
Die vorliegenden Befunde liefern Erkenntnisse zur Entste-hung der Frühsymptome bei Morbus Parkinson. Dies könnte neue Ansatzpunkte für die Therapie und Linderung von Schlafstörungen sowie Veränderungen im Tag/Nachtrhythmus liefern.
Epigenetic signatures such as methylation of the monoamine oxidase A (MAOA) gene have been found to be altered in panic disorder (PD). Hypothesizing temporal plasticity of epigenetic processes as a mechanism of successful fear extinction, the present psychotherapy-epigenetic study for we believe the first time investigated MAOA methylation changes during the course of exposure-based cognitive behavioral therapy (CBT) in PD. MAOA methylation was compared between N=28 female Caucasian PD patients (discovery sample) and N=28 age- and sex-matched healthy controls via direct sequencing of sodium bisulfite-treated DNA extracted from blood cells. MAOA methylation was furthermore analyzed at baseline (T0) and after a 6-week CBT (T1) in the discovery sample parallelized by a waiting time in healthy controls, as well as in an independent sample of female PD patients (N=20). Patients exhibited lower MAOA methylation than healthy controls (P<0.001), and baseline PD severity correlated negatively with MAOA methylation (P=0.01). In the discovery sample, MAOA methylation increased up to the level of healthy controls along with CBT response (number of panic attacks; T0–T1: +3.37±2.17%), while non-responders further decreased in methylation (−2.00±1.28%; P=0.001). In the replication sample, increases in MAOA methylation correlated with agoraphobic symptom reduction after CBT (P=0.02–0.03). The present results support previous evidence for MAOA hypomethylation as a PD risk marker and suggest reversibility of MAOA hypomethylation as a potential epigenetic correlate of response to CBT. The emerging notion of epigenetic signatures as a mechanism of action of psychotherapeutic interventions may promote epigenetic patterns as biomarkers of lasting extinction effects.
Prognostische Faktoren und das Outcome von Patienten mit einem primären Glioblastom sind in der Fachliteratur gut beschrieben. Im Gegensatz dazu gibt es wenige vergleichbare Informationen zu Patienten mit einem sekundären Glioblastom. Das Ziel dieser Arbeit war es, das Outcome von Patienten mit einem sekundären Glioblastom zu beurteilen und prognostische Faktoren in Be-zug auf das Gesamtüberleben zu identifizieren.
Dazu wurde die interne Datenbank des Universitätsklinikums Frankfurt/Main von Patienten mit Hirntumoren retrospektiv nach klinischen Daten durchsucht. Alle Patienten hatten ein histologisch gesichertes WHO Grad II oder III Gliom und anschließend ein WHO Grad IV sekundäres Glioblastom. Paraffiniertes Hirntumorgewebe wurde auf Mutationen der Isocitrat Dehydrogenase-1 (IDH1) mittels einer immunhistochemischen Färbung mit einem R132H (clone H09) spezifischen Antikörper untersucht. Eine uni- und multivariate statistische Analyse wurde durchgeführt, um Faktoren zu ermitteln, die potentiell das Gesamt-überleben beeinflussen könnten.
Es wurden 45 Patienten mit einem histologisch gesicherten sekundären Glioblastom untersucht. Das mediane Alter betrug 41 Jahre. 14 Patienten unterzogen sich einer radiologisch kompletten Resektion des sekundären Glioblastoms, 31 Patienten wurden subtotal reseziert oder biopsiert. Initial ist bei 37 Patienten ein astrozytärer Tumor nachgewiesen worden und die restlichen Patienten litten an Oligodendrogliomen oder gemischten Gliomen; bei der initialen Diagnose wurden 17 WHO Grad II und 28 WHO Grad III Tumoren fest-gestellt. Die mediane Zeit zwischen Ursprungstumor und dem Auftreten des sekundären Glioblastoms betrug 158,9 Wochen. Das mediane Gesamtüberleben betrug 445 Tage nach der Diagnose eines sekundären Glioblastoms. Mutationen des IDH1 (R132H) Proteins wurden bei 24 Patienten festgestellt und fehlten bei 17 Patienten; bei 4 Patienten konnte keine IDH1 immunhistochemische Färbung durchgeführt werden.
In der univariaten Analyse konnte der Zeitraum zwischen initialer Läsion und dem Progress zu einem sekundären Glioblastom als statistisch signifikanter Einflussfaktor identifiziert werden- Patienten mit einem Zeitraum von mehr als 2 Jahren hatten ein besseres Gesamtüberleben (460 vs. 327 Tage, p = 0,011). Außerdem konnte bei Patienten, die eine kombinierte Radiochemotherapie bekamen, ein besseres Gesamtüberleben nachgewiesen werden als bei Patienten, welche ausschließlich eine Therapieform erhielten (611 vs. 380 Tage, p < 0,001). Weiterhin konnten ein WHO Grad II Ursprungstumor (472 vs. 421 Tage, p = 0,05) und eine Frontalllappenlokalisation des Glioblastoms (472 vs. 425 Ta-ge, p = 0,031) das Überleben steigern.
In der multivariaten Analyse konnte gezeigt werden, dass die Mutation des IDH1 (R132H) Proteins in statistisch signifikanter Weise mit einem längeren Gesamtüberleben assoziiert war (p = 0,012); statistische Signifikanz für ein län-geres Gesamtüberleben bei Patienten mit initial einem WHO Grad II (p = 0,047) und einer Frontallappenlokalisation des Glioblastoms (p = 0,042) stellte sich auch ein. In Bezug auf die Patienten spezifischen Daten wurden zwei Prognosegruppen erstellt; Patienten in der guten Prognosegruppe scheinen einen Benefit von einer totalen Tumorresektion zu haben (p = 0,02), während eine Resektion für die andere Prognosegruppe keine große Rolle spielte (p = 0,926).
Trotz des relativ geringen Erkrankungsalters haben sekundäre Glioblastom Patienten eine schlechte Prognose. Die Ergebnisse dieser Arbeit unterstreichen die Wichtigkeit und den prognostischen Wert der IDH1 Diagnostik, die Notwendigkeit einer kombinierten Radiochemotherapie und eine Risikostratifizierung für eine Prognoseabschätzung anhand der Patienten spezifischen Einflussfaktoren.
Streptococcus pneumoniae is the most frequent cause of community-acquired pneumonia. The infection process involves bacterial cell surface receptors, which interact with host extracellular matrix components to facilitate colonization and dissemination of bacteria. Here, we investigated the role of host-derived extracellular RNA (eRNA) in the process of pneumococcal alveolar epithelial cell infection. Our study demonstrates that eRNA dose-dependently increased S. pneumoniae invasion of alveolar epithelial cells. Extracellular enolase (Eno), a plasminogen (Plg) receptor, was identified as a novel eRNA-binding protein on S. pneumoniae surface, and six Eno eRNA-binding sites including a C-terminal 15 amino acid motif containing lysine residue 434 were characterized. Although the substitution of lysine 434 for glycine (K434G) markedly diminished the binding of eRNA to Eno, the adherence to and internalization into alveolar epithelial cells of S. pneumoniae strain carrying the C-terminal lysine deletion and the mutation of internal Plg-binding motif were only marginally impaired. Accordingly, using a mass spectrometric approach, we identified seven novel eRNA-binding proteins in pneumococcal cell wall. Given the high number of eRNA-interacting proteins on pneumococci, treatment with RNase1 completely inhibited eRNA-mediated pneumococcal alveolar epithelial cell infection. Our data support further efforts to employ RNAse1 as an antimicrobial agent to combat pneumococcal infectious diseases.
Background: Resistance to temozolomide (TMZ) greatly limits chemotherapeutic effectiveness in glioblastoma (GBM). Here we analysed the ability of the Inhibitor-of-apoptosis-protein (IAP) antagonist birinapant to enhance treatment responses to TMZ in both commercially available and patient-derived GBM cells.
Methods: Responses to TMZ and birinapant were analysed in a panel of commercial and patient-derived GBM cell lines using colorimetric viability assays, flow cytometry, morphological analysis and protein expression profiling of pro- and antiapoptotic proteins. Responses in vivo were analysed in an orthotopic xenograft GBM model.
Results: Single-agent treatment experiments categorised GBM cells into TMZ-sensitive cells, birinapant-sensitive cells, and cells that were insensitive to either treatment. Combination treatment allowed sensitisation to therapy in only a subset of resistant GBM cells. Cell death analysis identified three principal response patterns: Type A cells that readily activated caspase-8 and cell death in response to TMZ while addition of birinapant further sensitised the cells to TMZ-induced cell death; Type B cells that readily activated caspase-8 and cell death in response to birinapant but did not show further sensitisation with TMZ; and Type C cells that showed no significant cell death or moderately enhanced cell death in the combined treatment paradigm. Furthermore, in vivo, a Type C patient-derived cell line that was TMZ-insensitive in vitro and showed a strong sensitivity to TMZ and TMZ plus birinapant treatments.
Conclusions: Our results demonstrate remarkable differences in responses of patient-derived GBM cells to birinapant single and combination treatments, and suggest that therapeutic responses in vivo may be greatly affected by the tumour microenvironment.
Der Nucleus suprachiasmaticus (SCN) ist ein Kerngebiet des Hypothalamus mit der Funktion des zentralen Taktgebers für die Generierung der circadianen Rhythmik. Zahlreiche petale Verbindungen zum SCN dienen der Synchronisierung der circadianen Uhr mit der tatsächlichen Tagesphase. Fugale Verbindungen des SCN dienen der Verteilung der Tageszeiteninformation über das Gehirn, insbesondere in vegetativen Zentren. So werden beispielsweise die physiologischen Vorgänge des Kreislaufsystems, Hormonausschüttung, der Schlaf-Wach-Zyklus etc. kontrolliert und mit Tag-Nacht-Wechsel synchronisiert. Obwohl viele dieser Verbindungen verstanden und beschrieben sind, sind die nahen Verbindungen in der unmittelbaren Nähe des SCN und des-sen intrinsische Verbindung nicht genau untersucht. Zur Darstellung dieser nahen Verbindungen wurden DiI-Tracer-Studien an Gehirnschnitten von Mäusen durchgeführt. Untersucht wurde parallel zu der DiI-Färbung das Neuropeptid Vasopressin innerhalb und außerhalb des SCN bei Mäusen von zwei verschiedenen Mäusestämmen (C3H und C57BL); C57BL ist defizient für das photoperiodische sezernierte Epiphysenhormon Melatonin, C3H-Mäuse er-blinden im frühen Lebensalter. Die immunzytochemische Untersuchung des Vasopressin-Systems belegte einen Unterschied in der Zytoarchitektur des SCN zwischen den C3H und C57BL Mäusen. Obwohl einige Elemente ähnliche Lokalisations- und Reaktivitätscharakteristika aufwiesen z.B. die dorsomediale Verteilung der Vasopressin-Perikaryen im Kerngebiet, so zeigte sich bei den C57BL-Mäusen eine deutlich schwächere Reaktivität des Neuropeptids AVP in diesem Bereich und ferner eine deutliche inhomogenere Verteilung der Vasopressin-Elemente im gesamten Kerngebiet. Die Tracing Untersuchung zeigte bei beiden Mäuse-Stämmen die gleichen Verbindungswege des SCN mit der nahen Periphere. Zum einen zeigen die Ergebnisse, dass der Hauptpassage des SCN im dorsomedialen, also im periventrikulären Bereich lokalisiert ist und das der SCN multiple Zugänge an seiner dorsalen und lateralen Grenze zur subparaventrikulären Zone besitzt. Ferner konnte auch gezeigt werden, dass beide bilateralen SCN-Kerne direkt über ausgeprägte Kommissurfaserverbindungen miteinander kommunizieren. Diese Kommissuren dürften dafür verantwortlich sein, den SCN einer Seite mit dem SCN der kontralateralen Seite zu synchronisieren. Obwohl in der vorliegenden Arbeit der Tracer nur einseitig appliziert wurde, ist dennoch von einer gekreuzten kontralateralen Verbindung auszugehen. Hier liegen Ansätze für weitere Un-tersuchungen. Ein weiterer Aspekt der Untersuchungen zeigen Faserverbin-dungen in die Area hypothalamica lateralis (AHL), die eine wichtige Rolle in der Kontrolle der zentralen Nahrungsaufnahme besitzt. Diese Faserverbin-dungen haben ihren Ursprung im SCN bzw. Nucl. paraventricularis und dem Nucl. arcuatus. Diese Verbindungen dienen am ehesten der Modulation der zentralen Regulation der Nahrungsaufnahme und spielen daher eine besondere Rolle in der Krankheitsentstehung wie Adipositas, Diabetes und Herz-Kreislauf-Erkrankung bei gestörter circadianen Rhythmik. Neu ist der Befund einer beachtlichen Anzahl von suprachiasmaticopetalen Fasern aus der sub-paraventrikulären Zone. Diese könnten die Einbindung des limbischen Systems in die Modulation der inneren Uhr erklären, die darüber hinaus ursächlich für zahlreiche Pathologien sein könnten.
Introduction: In the time of increasing resistance and paucity of new drug development there is a growing need for strategies to enhance rational use of antibiotics in German and Austrian hospitals. An evidence-based guideline on recommendations for implementation of antibiotic stewardship (ABS) programmes was developed by the German Society for Infectious Diseases in association with the following societies, associations and institutions: German Society of Hospital Pharmacists, German Society for Hygiene and Microbiology, Paul Ehrlich Society for Chemotherapy, The Austrian Association of Hospital Pharmacists, Austrian Society for Infectious Diseases and Tropical Medicine, Austrian Society for Antimicrobial Chemotherapy, Robert Koch Institute.
Materials and methods: A structured literature research was performed in the databases EMBASE, BIOSIS, MEDLINE and The Cochrane Library from January 2006 to November 2010 with an update to April 2012 (MEDLINE and The Cochrane Library). The grading of recommendations in relation to their evidence is according to the AWMF Guidance Manual and Rules for Guideline Development.
Conclusion: The guideline provides the grounds for rational use of antibiotics in hospital to counteract antimicrobial resistance and to improve the quality of care of patients with infections by maximising clinical outcomes while minimising toxicity. Requirements for a successful implementation of ABS programmes as well as core and supplemental ABS strategies are outlined. The German version of the guideline was published by the German Association of the Scientific Medical Societies (AWMF) in December 2013.
Downstream effects of plectin mutations in epidermolysis bullosa simplex with muscular dystrophy
(2016)
Mutations of the human plectin gene (PLEC) on chromosome 8q24 cause autosomal recessive epidermolysis bullosa simplex with muscular dystrophy (EBS-MD). In the present study we analyzed the downstream effects of PLEC mutations on plectin protein expression and localization, the structure of the extrasarcomeric desmin cytoskeleton, protein aggregate formation and mitochondrial distribution in skeletal muscle tissue from three EBS-MD patients.
PLEC gene analysis in a not previously reported 35-year-old EBS-MD patient with additional disease features of cardiomyopathy and malignant arrhythmias revealed novel compound heterozygous (p.(Phe755del) and p.(Lys1040Argfs*139)) mutations resulting in complete abolition of plectin protein expression. In contrast, the other two patients with different homozygous PLEC mutations showed preserved plectin protein expression with one only expressing rodless plectin variants, and the other markedly reduced protein levels. Analysis of skeletal muscle tissue from all three patients revealed severe disruption of the extrasarcomeric intermediate filament cytoskeleton, protein aggregates positive for desmin, syncoilin, and synemin, degenerative myofibrillar changes, and mitochondrial abnormalities comprising respiratory chain dysfunction and an altered organelle distribution and amount.
Our study demonstrates that EBS-MD causing PLEC mutations universally result in a desmin protein aggregate myopathy phenotype despite marked differences in individual plectin protein expression patterns. Since plectin is the key cytolinker protein that regulates the structural and functional organization of desmin filaments, the defective anchorage and spacing of assembled desmin filaments is the key pathogenetic event that triggers the formation of desmin protein aggregates as well as secondary mitochondrial pathology.