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Institute
- Medizin (2562) (remove)
Die radikale Prostatektomie (RP) stellt neben der Radiatio der Prostata den Goldstandard der Lokaltherapie des lokalisierten Prostatakarzinoms (PCa) dar. Neben der Erzielung einer postoperativen Tumorfreiheit (onkologisches Ergebnis), spielen die postoperativen, funktionellen Ergebnisse (z.B. Erektionsfähigkeit, Urin-Kontinenz) nach RP für die Patienten eine zentrale Rolle. Hierbei ist vor allem die (Wieder-) Erlangung der postoperativen Kontinenz hervorzuheben, da das Ausbleiben mit einem substantiellem Verlust der Lebensqualität einhergeht und eine deutliche Einschränkung im Alltag darstellt. Verschiedene Tumor- und Patientencharakteristika (pathologisches Tumorstadium, Body Mass Index [BMI], Alter, Prostatavolumen) wurden in vorangegangenen Publikationen als Faktoren identifiziert, die Einflüsse auf die Wiedererlangung der Kontinenz nach RP haben. Interessanterweise jedoch, wurde der Einfluss von Diabetes Mellitus auf die Kontinenz-Rate zum jetzigen Stand nur unzureichend und teils mit widersprüchlichen Ergebnissen untersucht. In Anbetracht der vorbekannten protrahierten Wundheilungsverläufe sowie Mikrozirkulationsstörungen und Neuropathie bei Diabetes mellitus Patienten, hat die jetzige Studie deshalb untersucht, ob das Vorliegen von Diabetes Mellitus einen Einfluss auf die postoperative Früh-Kontinenz bei PCa-Patienten hat, die eine RP erhalten haben.
Nach Vorliegen des Ethikkomitee-Beschluss erfolgte mit Hilfe der RP-Datenbank der Klinik für Urologie, Johann Wolfgang-Goethe-Universität die Patientenidentifizierung im Zeitraum von 2018 bis 2021. Hierbei wurden Patienten in die Studienkohorte eingeschlossen bei denen Informationen bezüglich der Früh-Kontinenz (30-90 Tage postoperativ) vorlagen. Kontinenz wurde definiert als die Verwendung von keiner bzw. einer Sicherheitsvorlage innerhalb eines Zeitraums von 24 Stunden. Neben Auswertung der Kontinenz-Raten hinsichtlich des Diabetes Mellitus Status, erfolgte die Zuhilfenahme von uni- und multivariablen logistische Regressionsanalysen um den Effekt von Diabetes Mellitus auf die Kontinenz zu untersuchen. Kovariablen beinhalteten das pathologisches Tumorstadium, BMI, Alter, OP-Verfahren und Durchführung einer Nerv-Erhaltung.
Innerhalb der Studienkohorte (n=142) lag eine Diabetes Mellitus Erkrankung bei 15 Patienten (11%) vor. Mit Ausnahme eines höheren BMI (Median: 28.6 vs 26.5 m2/kg; p=0.005) bei Diabetes Mellitus Patienten, bestanden keine signifikanten Unterschiede hinsichtlich Patienten und Tumorcharakteristika zwischen den beiden Gruppen (p>0.05). Die Früh-Kontinenz Rate war bei Diabetes Mellitus Patienten geringer im Vergleich zu der restlichen Studienkohorte (33 vs 63%; p=0.03). Dieser Unterschied spiegelte sich ebenfalls in der univariablen logistischen Regressionsanalyse wider, in der Diabetes Mellitus einen signifikanten Einfluss auf die Früh-Kontinenz aufwies (Odds Ratio [OR]: 0.29, 95%-KI [95%-Konfidenz Interval]: 0.09-0.99; p=0.03). Der signifikante Einfluss von Diabetes Mellitus blieb ebenfalls in der multivariablen logistischen Regressionsanalyse fortbestehen, nachdem weitere Kovariablen berücksichtigt wurden (OR: 0.26; 95%-KI: 0.07-0.86; p=0.03). Unter Berücksichtigung der Limitationen der vorliegenden Studie (retrospektives Studiendesign, limitierte Fallzahl) lassen die Ergebnisse darauf schließen, dass das Vorliegen einer Diabetes Mellitus Erkrankung einen negativen Einfluss auf die Wiedererlangung der Kontinenz zu einem frühen Zeitpunkt nach RP hat. Die vorliegenden Ergebnisse haben für den klinischen Alltag wichtige Implikationen. Im Rahmen der Aufklärung vor RP kann der Patient bezüglich seines individuellen Risikos einer verlängerten postoperativen Inkontinenz entsprechend aufgeklärt werden, um somit die Erwartungshaltung des Patienten realitätsgetreu zu adressieren. Betrachtet man den postoperativen Verlauf, legen die vorliegenden Ergebnisse nahe, dass Diabetes mellitus Patienten aufgrund Ihrer geringeren Früh-Kontinenz Rate von einer intensivierte Beckenboden-Training zur Wiedererlangung der Kontinenz besonders profitieren könnten.
Auf der Grundlage dieser Studie sollten multizentrische Studien mit einer umfangreicheren Kohortengröße erfolgen und den Einfluss von Diabetes Mellitus nicht nur auf die Früh-Kontinenz, sondern ebenfalls auf die langfristige Kontinenz (>12 Monate) zu untersuchen
Beside mosquitoes, ticks are well-known vectors of different human pathogens. In the Northern Hemisphere, Lyme borreliosis (Eurasia, LB) or Lyme disease (North America, LD) is the most commonly occurring vector-borne infectious disease caused by bacteria of the genus Borrelia which are transmitted by hard ticks of the genus Ixodes. The reported incidence of LB in Europe is about 22.6 cases per 100,000 inhabitants annually with a broad range depending on the geographical area analyzed. However, the epidemiological data are largely incomplete, because LB is not notifiable in all European countries. Furthermore, not only differ reporting procedures between countries, there is also variation in case definitions and diagnostic procedures. Lyme borreliosis is caused by several species of the Borrelia (B.) burgdorferi sensu lato (s.l.) complex which are maintained in complex networks including ixodid ticks and different reservoir hosts. Vector and host influence each other and are affected by multiple factors including climate that have a major impact on their habitats and ecology. To classify factors that influence the risk of transmission of B. burgdorferi s.l. to their different vertebrate hosts as well as to humans, we briefly summarize the current knowledge about the pathogens including their astonishing ability to overcome various host immune responses, regarding the main vector in Europe Ixodes ricinus, and the disease caused by borreliae. The research shows, that a higher standardization of case definition, diagnostic procedures, and standardized, long-term surveillance systems across Europe is necessary to improve clinical and epidemiological data.
The sympathetic nervous system (SNS) is a major regulatory mediator connecting the brain and the immune system that influences accordingly inflammatory processes within the entire body. In the periphery, the SNS exerts its effects mainly via its neurotransmitters norepinephrine (NE) and epinephrine (E), which are released by peripheral nerve endings in lymphatic organs and other tissues. Depending on their concentration, NE and E bind to specific α- and β-adrenergic receptor subtypes and can cause both pro- and anti-inflammatory cellular responses. The co-transmitter neuropeptide Y, adenosine triphosphate, or its metabolite adenosine are also mediators of the SNS. Local pro-inflammatory processes due to injury or pathogens lead to an activation of the SNS, which in turn induces several immunoregulatory mechanisms with either pro- or anti-inflammatory effects depending on neurotransmitter concentration or pathological context. In chronic inflammatory diseases, the activity of the SNS is persistently elevated and can trigger detrimental pathological processes. Recently, the sympathetic contribution to mild chronic inflammatory diseases like osteoarthritis (OA) has attracted growing interest. OA is a whole-joint disease and is characterized by mild chronic inflammation in the joint. In this narrative article, we summarize the underlying mechanisms behind the sympathetic influence on inflammation during OA pathogenesis. In addition, OA comorbidities also accompanied by mild chronic inflammation, such as hypertension, obesity, diabetes, and depression, will be reviewed. Finally, the potential of SNS-based therapeutic options for the treatment of OA will be discussed.
Autism Spectrum Disorder (ASD) is a neurodevelopmental condition with an onset in early development. ASD has varying degrees of severity and thus affects people differently throughout their lives. Early diagnosis of ASD is essential to provide children with individually-tailored support.8 Eye-tracking may contribute to an earlier diagnosis: Several studies showed differences in eye movements between people with autism spectrum disorder (ASD) and typically developing controls (TD). Different eye movements may contribute to different visual perception that perpetuates to problems in attention, communication and social interaction.
Eye movements are divided into: (1) Fixations (2) Saccades (fast and short eye movements) and (3) Smooth Pursuit Eye Movements (SPEM). SPEM follow the target in a continuous manner. The latter are the subject of the present thesis. SPEM consist of two phases: the open loop phase (= phase of initiation, first 50- 100ms) and the closed loop phase (= phase of maintenance, after about 100ms). SPEM are usually measured by a gain index. It is defined as the ratio of smooth pursuit velocity and visual target velocity and ideally equals to 1.2
In young children, corneal-reflection (CR) eye-tracking is usually applied to quantify eye movement. It allows precise measurements without the use of potentially intrusive devices.
Studies in ASD reported deficits in open loop and closed loop pursuit in children and adults with a mean age of 19.32 (TD) and 20.04 (ASD) years. However, SPEM in preschoolers with ASD remain understudied, although this developmental phase is crucial to the development of non-social and social attentional abilities.
In the present study 66 toddlers and preschoolers (18 to 72 months; ASD: n = 33, TD: n = 33) with matched cognitive abilities and sex were assessed. The main objective was to compare the gain index (Smooth Pursuit Gain = SPG). SPEM were compared between groups with gain index as a dependent measure. We hypothesized that participants with ASD show lower average gain compared to the control group.
We could show a significant group influence on the gain when considering interactions between target velocity and group (p = 0.041). The TD group showed a greater dependence on the increasing object speed than the ASD group with a trend of -0.30 ± 0.11 in the TD group and a trend of -0.13 ± 0.12 in the ASD group. Across groups, the gain decreased with increasing target velocity and dropped faster in vertical than in horizontal trials. Additionally, participants showed a lower SPG in vertical sequences than in horizontal sequences. This supports the general validity of the measure.
Toddlers and preschoolers represent a group that has been subject of little research to date. In addition, there has been only a limited number of studies analyzing SPEM in ASD. To check for a possible group difference without interactions a study with a larger sample size at fixed target velocity and target direction should follow.
Highlights
• Reduced evoked theta activity in the deaf.
• Reduced theta-gamma and alpha-gamma cross-frequency couplings in the deaf.
• Stronger delta-alpha coupling in the deaf.
Abstract
Neurons within a neuronal network can be grouped by bottom-up and top-down influences using synchrony in neuronal oscillations. This creates the representation of perceptual objects from sensory features. Oscillatory activity can be differentiated into stimulus-phase-locked (evoked) and non-phase-locked (induced). The former is mainly determined by sensory input, the latter by higher-level (cortical) processing. Effects of auditory deprivation on cortical oscillations have been studied in congenitally deaf cats (CDCs) using cochlear implant (CI) stimulation. CI-induced alpha, beta, and gamma activity were compromised in the auditory cortex of CDCs. Furthermore, top-down information flow between secondary and primary auditory areas in hearing cats, conveyed by induced alpha oscillations, was lost in CDCs. Here we used the matching pursuit algorithm to assess components of such oscillatory activity in local field potentials recorded in primary field A1. Additionally to the loss of induced alpha oscillations, we also found a loss of evoked theta activity in CDCs. The loss of theta and alpha activity in CDCs can be directly related to reduced high-frequency (gamma-band) activity due to cross-frequency coupling. Here we quantified such cross-frequency coupling in adult 1) hearing-experienced, acoustically stimulated cats (aHCs), 2) hearing-experienced cats following acute pharmacological deafening and subsequent CIs, thus in electrically stimulated cats (eHCs), and 3) electrically stimulated CDCs. We found significant cross-frequency coupling in all animal groups in > 70% of auditory-responsive sites. The predominant coupling in aHCs and eHCs was between theta/alpha phase and gamma power. In CDCs such coupling was lost and replaced by alpha oscillations coupling to delta/theta phase. Thus, alpha/theta oscillations synchronize high-frequency gamma activity only in hearing-experienced cats. The absence of induced alpha and theta oscillations contributes to the loss of induced gamma power in CDCs, thereby signifying impaired local network activity.
Dieser Arbeit lag die Fragestellung zugrunde, welchen Einfluss die jeweilige Transfusionsstrategie auf AML-Patienten unter intensiver Induktionschemotherapie hat.
Dafür wurde ein am Universitätsklinikum Frankfurt zwischen 2007 und 2018 behandeltes Kollektiv von 352 Patienten untersucht. So erfolgte hier bis ins Jahr 2015 hinein die Transfusion eines EK ab einem Hb-Wert <8g/dl und nach Änderung des Transfusionstriggers ab einem Hb <7g/dl. AML-Patienten aus dem Jahr 2015 – dem Jahr der Änderung der Transfusionsregel – wurden von weiterer Untersuchung ausgeschlossen, um zwei klar abgrenzbare Kohorten erhalten zu können.
Es zeigte sich, dass die weniger restriktive Transfusionskohorte unter Induktionschemotherapie einen durchschnittlich um 1g/dl höheren Hb-Wert aufwies und früher als die restriktive Kohorte transfundiert wurde. Die Anzahl an Fiebertagen, CRP-Werte, Aufenthalte auf Intensivstation sowie die Dauer des Krankenhausaufenthaltes betrachtend, zeigte sich hingegen kein signifikanter Unterscheid zwischen beiden Kohorten.
Basierend auf unserer Arbeit ergeben sich keine Hinweise dafür, dass die restriktive Transfusionspraxis einer weniger restriktiven für AML-Patienten unterlegen ist. Limitierend auf die Aussagekraft der Ergebnisse wirken sich dabei die retrospektive Natur der Arbeit sowie die zeitliche Verschiebung der Behandlungszeiträume beider Kohorten aus.
Ergebnisse der bislang ausstehenden randomisierten Studien, die den Einfluss unterschiedlicher Transfusionsregimes auf Patienten mit hämatologischen Krankheiten untersuchen, sind in Bälde zu erwarten. Die bereits vorliegenden Pilotstudien und Ergebnisse der TRIST-Studie decken sich mit der von uns beobachteten Nicht-Unterlegenheit der restriktiven Transfusionspraxis für ein hämatoonkologisches Patientenkollektiv, sodass es abzuwarten gilt, ob sich dies auch in weiteren größeren randomisierten und kontrollierten Studien beweisen kann.
The effect of race/ethnicity on cancer-specific mortality after salvage radical prostatectomy
(2022)
Background: To test the effect of race/ethnicity on cancer-specific mortality (CSM) after salvage radical prostatectomy (SRP).
Material and methods: We relied on the Surveillance, Epidemiology and End Results database (SEER, 2004–2016) to identify SRP patients of all race/ethnicity background. Univariate and multivariate Cox regression models addressed CSM according to race/ethnicity.
Results: Of 426 assessable SRP patients, Caucasians accounted for 299 (69.9%) vs. 68 (15.9%) African-Americans vs. 39 (9.1%) Hispanics vs. 20 (4.7%) Asians. At diagnosis, African-Americans (64 years) were younger than Caucasians (66 years), but not younger than Hispanics (66 years) and Asians (67 years). PSA at diagnosis was significantly higher in African-Americans (13.2 ng/ml), Hispanics (13.0 ng/ml), and Asians (12.2 ng/ml) than in Caucasians (7.8 ng/ml, p = 0.01). Moreover, the distribution of African-Americans (10.3%–36.6%) and Hispanics (0%–15.8%) varied according to SEER region. The 10-year CSM was 46.5% in African-Americans vs. 22.4% in Caucasians vs. 15.4% in Hispanics vs. 15.0% in Asians. After multivariate adjustment (for age, clinical T stage, lymph node dissection status), African-American race/ethnicity was an independent predictor of higher CSM (HR: 2.2, p < 0.01), but not Hispanic or Asian race/ethnicity. The independent effect of African-American race/ethnicity did not persist after further adjustment for PSA.
Conclusion: African-Americans treated with SRP are at higher risk of CSM than other racial/ethnic groups and also exhibited the highest baseline PSA. The independent effect of African-American race/ethnicity on higher CSM no longer applies after PSA adjustment since higher PSA represents a distinguishing feature in African-American patients.
Angesichts der Bedrohung durch den Klimawandel sind Maßnahmen zur Reduktion von Treibhausgasemissionen dringend notwendig. Obwohl auf den Gesundheitssektor 5 bis 10 % der nationalen Treibhausgasemissionen entfallen, spielt das Thema Nachhaltigkeit in deutschen Kliniken bisher nur eine untergeordnete Rolle. Studien der letzten Jahre haben gezeigt, dass die Nutzung von Mehrwegartikeln gegenüber der Nutzung von Einwegartikeln in der Anästhesiologie einen Vorteil in Bezug auf die CO2-Emissionen bieten kann. Gleichzeitig stehen Kliniken vor der Herausforderung, kosteneffizient zu handeln. In der vorliegenden Promotionsarbeit werden deshalb die CO2-Emissionen sowie die Kosten von Einweg-Beatmungsschlauchsystemen, Einweg-Beatmungsmasken und Einweg-Laryngoskopspateln im Zentral-OP des Universitätsklinikums Frankfurt pro Nutzung ermittelt und diese mit den Kosten sowie den CO2-Emissionen von entsprechenden Mehrweg-Alternativen pro Nutzung verglichen. Daraus soll eine Handlungsempfehlung für die künftige Verwendung von Mehrwegmaterial oder Einwegmaterial abgeleitet und ein Beitrag zur Nachhaltigkeit in der Anästhesiologie geleistet werden.
Methodisch wurde eine deskriptive Untersuchung umgesetzt. Die Daten wurden anhand von Informationen, die von den Produktherstellern, der Host Energie GmbH, der Abteilung Einkauf und den Mitarbeiterinnen und Mitarbeitern der Materialaufbereitung des Universitätsklinikums Frankfurt zur Verfügung gestellt wurden sowie durch eigene Erhebung gesammelt. Die Kosten pro Nutzung wurden anhand der realen Bezugspreise aus dem Jahr 2022 für die Einwegmaterialien bzw. der Angebote der Anbieter für die Mehrwegprodukte errechnet. Die Kosten der Entsorgung wurden gewichtsbezogen addiert. Für die Mehrwegartikel wurden zudem die Kosten der Aufbereitung berücksichtigt. Für die Kalkulationen der CO2-Emissionen wurden die Konversionsfaktoren des DEFRA aus Großbritannien verwendet, die bei bekanntem Produktgewicht eine näherungsweise Bestimmung der Treibhausgasemissionen der Materialproduktion, der Entsorgung und der Aufbereitung erlauben. Patientendaten wurden nicht verwendet, so dass weder ein Ethikvotum noch ein Datenschutzvotum erforderlich waren.
Die Ergebnisse zeigen, dass alle untersuchten Mehrwegartikel pro Nutzung günstiger sind als die äquivalenten Einwegartikel, wobei der Preisunterschied bei den Laryngoskopspateln am größten ist. Diese kosten als Einwegartikel 2,66 € pro Nutzung, die Mehrweg-Alternative 0,12 € pro Nutzung. Gleichzeitig sind die Treibhausgasemissionen pro Nutzung für alle untersuchten Mehrwegartikel niedriger als für die entsprechenden Einwegartikel. Der Unterschied ist hier ebenfalls bei den Laryngoskopspateln am größten. Ein Einweg-Laryngoskopspatel der Größe 4 generiert pro Nutzung 0,228 kg CO2-Äquivalent, wohingegen die Mehrweg-Alternative nur 0,093 kg CO2-Äquivalent verursacht.
Im Fazit ergibt sich dadurch, dass die Verwendung von Mehrweg-Beatmungsschlauchsystemen, Mehrweg-Beatmungsmasken und Mehrweg-Laryngoskopspateln für das Universitätsklinikum Frankfurt einen sowohl ökonomischen als auch ökologischen Vorteil gegenüber der Verwendung der Einwegartikel bietet. Die Umstellung zu Mehrwegartikeln in der Anästhesiologie hat somit nicht nur das Potenzial Kosten einzusparen, sondern auch den CO2-Fußabdruck im Gesundheitssektor zu senken.
A broad range of neuropsychiatric disorders are associated with alterations in macroscale brain circuitry and connectivity. Identifying consistent brain patterns underlying these disorders by means of structural and functional MRI has proven challenging, partly due to the vast number of tests required to examine the entire brain, which can lead to an increase in missed findings. In this study, we propose polyconnectomic score (PCS) as a metric designed to quantify the presence of disease-related brain connectivity signatures in connectomes. PCS summarizes evidence of brain patterns related to a phenotype across the entire landscape of brain connectivity into a subject-level score. We evaluated PCS across four brain disorders (autism spectrum disorder, schizophrenia, attention deficit hyperactivity disorder, and Alzheimer’s disease) and 14 studies encompassing ∼35,000 individuals. Our findings consistently show that patients exhibit significantly higher PCS compared to controls, with effect sizes that go beyond other single MRI metrics ([min, max]: Cohen’s d = [0.30, 0.87], AUC = [0.58, 0.73]). We further demonstrate that PCS serves as a valuable tool for stratifying individuals, for example within the psychosis continuum, distinguishing patients with schizophrenia from their first-degree relatives (d = 0.42, p = 4 x 10−3, FDR-corrected), and first-degree relatives from healthy controls (d = 0.34, p = 0.034, FDR-corrected). We also show that PCS is useful to uncover associations between brain connectivity patterns related to neuropsychiatric disorders and mental health, psychosocial factors, and body measurements.
Purpose: To evaluate intermediate and long-term visual outcomes and safety of a phakic intraocular posterior chamber lens with a central hole (ICL V4c) for myopic eyes.
Methods: Retrospective, consecutive case study of patients that uneventfully received a ICL V4c for myopia correction, with a 5-year postoperative follow-up. Department of Ophthalmology, Goethe University Frankfurt, Germany.
Results: From 241 eyes that underwent ICL implantation, we included 45 eyes with a mean age at surgery of 33 years ± 6 (18–48 years), with a 5 years follow-up. CDVA improved from 0.05logMAR ± 0.15 CDVA preoperatively to − 0.00 ± 0,07 at 5 years and did not change significantly from 3 to 5 years’ time (p = 0.266). The mean spherical equivalent (SE) improved from -10.13D ± 3.39 to − 0.45D ± 0.69. The change in endothelial cell count showed a mean decrease of 1.9% per year throughout the follow-up. Safety and efficacy index were 1.16 and 0.78, respectively. Cataract formation was seen in 2 of 241 eyes (0.8%), but in none of the 45 eyes that finished the 5-year follow-up.
Conclusions: Our data show a good intermediate and long-term stability, efficiency, and safety of ICL V4c phakic lenses in myopic eyes comparable to other known literature.
Die Appendizitis stellt mit einer Inzidenz von 115 pro 100000 Einwohnern in Deutschland eine der häufigsten Ursachen für ein akutes Abdomen dar. Bakterielle Infektionen sind ein wesentlicher Faktor für die postoperative Morbidität nach Appendektomie.
Ziel dieser prospektiven Studie war es, das Keimspektrum und insbesondere die Prävalenz resistenter Keime bei der akuten Appendizitis zu bestimmen und die Auswirkungen resistenter Keime auf das Auftreten infektiöser Komplikationen zu analysieren. Alle erwachsenen Patient*innen mit akuter Appendizitis, die zwischen April 2022 und Juli 2023 am Universitätsklinikum Frankfurt operativ behandelt wurden, wurden prospektiv eingeschlossen. Das Keimspektrum der Appendix und die Häufigkeit von MRE in Rektalabstrichen wurden analysiert. Die klinischen Daten wurden extrahiert, um die Korrelation des Keimspektrums mit dem Auftreten von postoperativen Komplikationen, Dauer und Art der Antibiotikatherapie und dem postoperativen Verlauf zu evaluieren. 30 Tage nach der Operation wurde ein Follow-up durchgeführt. Insgesamt wurden 105 Patient*innen in die Studie eingeschlossen.
In den Appendixabstrichen gelang ein Erregernachweis bei 67,6 % aller Fälle. Hierbei betrug die Prävalenz von Keimen mit Antibiotikaresistenz 43,8 %, Multipler-Antibiotikaresistenz (MAR) 27,6 % und bei 5,7 % der Fälle gelang ein MRE-Nachweis nach CDC im Appendixabstrich. Beim MRE-Screening konnten im Rektalabstrich bei 11,4 % der Patient*innen ein MRE nachgewiesen werden. In vier Fällen zeigte sich eine Übereinstimmung zwischen rektalen und appendikulären Abstrich, somit betrug die Sensitivität des MRE-Screenings für einen Nachweis multiresistenter Keime in der Appendix lediglich 33,3 % bei einer Spezifität von 86,7 %. In einer univariaten Analyse konnte das Vorliegen eines Diabetes mellitus als Risikofaktor für das Auftreten von Keimen mit Cefuroxim- Resistenz, Multipler-Antibiotikaresistenz (MAR) und MRE identifiziert werden.
Insgesamt erhielten 47,6 % aller Patient*innen postoperativ eine Antibiotikatherapie, von denen erfolgte bei 46 % eine Umstellung der empirischen Antibiose auf eine antibiogramm-gerechte Therapie nach Erhalt des mikrobiologischen Befundes. Insbesondere Patient*innen mit komplizierter Appendizitis erhielten postoperativ eine Antibiotikatherapie, wobei 28 % eine Antibiotikaeskalation benötigten.
Patient*innen, deren Appendixabstriche eine Resistenz gegen maximal ein Antibiotikum aufwiesen, wurden als nicht multiple Resistenz (Nicht-MAR) definiert und mit Patient*innen verglichen, deren Keime mit multipler Antibiotikaresistenz (MAR) waren. Die MAR-Gruppe zeigte im Vergleich zur Nicht-MAR-Gruppe eine höhere Inzidenz postoperativer Komplikationen, insbesondere eine erhöhte Inzidenz von Clavien-Dindo Grad 3 Komplikationen sowie von tiefen postoperativen Wundinfektionen (CDC Grad A3). Weiterhin benötigten Patient*innen der MAR-Gruppe häufiger eine postoperative Antibiotikatherapie und es erfolgte häufiger eine Eskalation der antibiotischen Therapie. Dies ging auch mit einem signifikant verlängerten Krankenhausaufenthalt einher.
Zusammenfassend kann festgestellt werden, dass eine bakterielle Infektion mit Multipler Antibiotikaresistenz bei der akuten Appendizitis häufig auftritt und die Morbidität nach Appendektomie beeinflusst. Die mikrobiologische Untersuchung mittels Appendixabstrich bei operativ behandelten Fällen von akuter komplizierter Appendizitis, die eine postoperative Antibiotikatherapie erfordern, könnte somit eine gezielte und kürzere Antibiotikatherapie ermöglichen. Dies könnte dazu beitragen, längere Krankenhausaufenthalte zu vermeiden, den unnötigen Einsatz unwirksamer Antibiotika zu reduzieren und die Kosten im Gesundheitswesen zu senken.
Polygene Risikoscores (PRS) integrieren zahlreiche Einzelnukleotid-Polymorphismen (SNP) von meist geringer Effektstärke, um Auskunft über das Erkrankungsrisiko bestimmter Krankheiten zu geben. In dieser Arbeit wurde der PRS zur genetisch generalisierten Epilepsie (GGE) von Leu et al. aus dem Jahr 2019 untersucht, um festzustellen, ob über das Erkrankungsrisiko hinaus noch Korrelationen mit weiteren phänotypischen Eigenschaften von Patienten bestehen. Der Nachweis solcher Zusammenhänge würde eine Prädiktionsfähigkeit des GGE-PRS demonstrieren, die perspektivisch ein Potential für dessen klinische Anwendbarkeit, beispielsweise im Sinne der personalisierten Medizin, aufzeigen könnte.
Die Identifizierung neuer Korrelationen sollte durch Vergleich der Phänotypen von zwei Gruppen von GGE-Patienten mit extrem hohen, beziehungsweise extrem niedrigen PRS-Werten erfolgen. Hierfür wurden von 2256 Patienten aus der Datenbank von Epi25, einem internationalen Forschungskollaborativ zur Erforschung der Relevanz genetischer Faktoren bei der Entwicklung von Epilepsie, die Patienten mit den höchsten (n=59) und den niedrigsten (n=49) GGE-PRS-Werten ausgewählt. Für diese 108 Patienten wurden retrospektive klinische Daten von den jeweiligen Behandlungszentren akquiriert. Hierzu wurde den Studienleitern der Zentren ein Questionnaire mit Fragen zu zahlreichen phänotypischen Parametern der Patienten übermittelt. Die Rücklaufrate war mit 54% gut.
Die so eingeholten Patientendaten wurden anschließend mittels Exaktem Test nach Fisher und Wilcoxon-Rangsummentest statistisch analysiert, um Unterschiede zwischen den Phänotypen beider Gruppen nachzuweisen. Im Falle der Pharmakoresistenz zeichneten sich hierbei zunächst signifikante Unterschiede ab, die ein selteneres Auftreten dieser Eigenschaft für Patienten mit hohen GGE-PRS-Werten implizierten. Diese Ergebnisse waren jedoch nach einer Bonferroni-Korrektur und bei Validierung in einer größeren Kohorte (n=825) nicht mehr signifikant. Für die anderen untersuchten Parameter waren ebenfalls keine signifikanten Unterschiede nachweisbar.
Das Ergebnis, dass für keinen der untersuchten Parameter signifikante Differenzen bestanden, obwohl zwei Kohorten mit extrem gegensätzlichen PRS-Werten untersucht wurden, spricht gegen eine Verwendung des aktuell verfügbaren GGE-PRS als prädiktiver Biomarker über das Erkrankungsrisiko hinaus und somit gegen dessen klinische Anwendbarkeit. Jedoch können die nicht-signifikanten Korrelationen im Falle der Pharmakoresistenz als Hinweis verstanden werden, dass im Bereich der Pharmakotherapie Zusammenhänge zwischen Score und Phänotyp bestehen könnten, die weiterer Untersuchungen in zukünftigen Studien bedürfen. Bei Verwendung eines verbesserten GGE-PRS mit zusätzlichen risikoassoziierten SNP und verfeinerter Wichtung der Effektstärken sowie größerer Kohorten könnten in diesem Bereich möglicherweise auch signifikante Zusammenhänge nachweisbar werden.
Background: Prostate cancer is a major health concern in aging men. Paralleling an aging society, prostate cancer prevalence increases emphasizing the need for efcient diagnostic algorithms.
Methods: Retrospectively, 106 prostate tissue samples from 48 patients (mean age,
66 ± 6.6 years) were included in the study. Patients sufered from prostate cancer (n = 38) or benign prostatic hyperplasia (n = 10) and were treated with radical prostatectomy or Holmium laser enucleation of the prostate, respectively. We constructed tissue microarrays (TMAs) comprising representative malignant (n = 38) and benign (n = 68) tissue cores. TMAs were processed to histological slides, stained, digitized and assessed for the applicability of machine learning strategies and open–source tools in diagnosis of prostate cancer. We applied the software QuPath to extract features for shape, stain intensity, and texture of TMA cores for three stainings, H&E, ERG, and PIN-4. Three machine learning algorithms, neural network (NN), support vector machines (SVM), and random forest (RF), were trained and cross-validated with 100 Monte Carlo random splits into 70% training set and 30% test set. We determined AUC values for single color channels, with and without optimization of hyperparameters by exhaustive grid search. We applied recursive feature elimination to feature sets of multiple color transforms.
Results: Mean AUC was above 0.80. PIN-4 stainings yielded higher AUC than H&E and
ERG. For PIN-4 with the color transform saturation, NN, RF, and SVM revealed AUC of 0.93 ± 0.04, 0.91 ± 0.06, and 0.92 ± 0.05, respectively. Optimization of hyperparameters improved the AUC only slightly by 0.01. For H&E, feature selection resulted in no increase of AUC but to an increase of 0.02–0.06 for ERG and PIN-4.
Conclusions: Automated pipelines may be able to discriminate with high accuracy between malignant and benign tissue. We found PIN-4 staining best suited for classifcation. Further bioinformatic analysis of larger data sets would be crucial to evaluate the reliability of automated classifcation methods for clinical practice and to evaluate potential discrimination of aggressiveness of cancer to pave the way to automatic precision medicine.
This prospective study sought to evaluate potential savings of radiation dose to medical staff using real-time dosimetry coupled with visual radiation dose feedback during angiographic interventions. For this purpose, we analyzed a total of 214 angiographic examinations that consisted of chemoembolizations and several other types of therapeutic interventions. The Unfors RaySafe i2 dosimeter was worn by the interventionalist at chest height over the lead protection. A total of 110 interventions were performed with real-time radiation dosimetry allowing the interventionalist to react upon higher x-ray exposure and 104 examinations served as the comparative group without real-time radiation monitoring. By using the real-time display during interventions, the overall mean operator radiation dose decreased from 3.67 (IQR, 0.95–23.01) to 2.36 μSv (IQR, 0.52–12.66) (−36%; p = 0.032) at simultaneously reduced operator exposure time by 4.5 min (p = 0.071). Dividing interventions into chemoembolizations and other types of therapeutic interventions, radiation dose decreased from 1.31 (IQR, 0.46-3.62) to 0.95 μSv (IQR, 0.53-3.11) and from 24.39 (IQR, 12.14-63.0) to 10.37 μSv (IQR, 0.85-36.84), respectively, using live-screen dosimetry (p ≤ 0.005). Radiation dose reductions were also observed for the participating assistants, indicating that they could also benefit from real-time visual feedback dosimetry during interventions (−30%; p = 0.039). Integration of real-time dosimetry into clinical processes might be useful in reducing occupational radiation exposure time during angiographic interventions. The real-time visual feedback raised the awareness of interventionalists and their assistants to the potential danger of prolonged radiation exposure leading to the adoption of radiation-sparing practices. Therefore, it might create a safer environment for the medical staff by keeping the applied radiation exposure as low as possible.
The combination of histological and biomolecular analyses provides deep understanding of different biological processes and is of high interest for basic and applied research. However, the available analytical methods are still limited, especially when considering bone samples. This study compared different fixation media to identify a sufficient analytical method for the combination of histological, immuno-histological and biomolecular analyses of the same fixed, processed and paraffin embedded bone sample. Bone core biopsies of rats’ femurs were fixed in different media (RNAlater + formaldehyde (R + FFPE), methacarn (MFPE) or formaldehyde (FFPE)) for 1 week prior to decalcification by EDTA and further histological processing and paraffin embedding. Snap freezing (unfixed frozen tissue, UFT) and incubation in RNAlater were used as additional controls. After gaining the paraffin sections for histological and immunohistological analysis, the samples were deparaffined and RNA was isolated by a modified TRIZOL protocol. Subsequently, gene expression was evaluated using RT-qPCR. Comparable histo-morphological and immuno-histological results were evident in all paraffin embedded samples of MFPE, FFPE and R + FFPE. The isolated RNA in the group of MFPE showed a high concentration and high purity, which was comparable to the UFT and RNAlater groups. However, in the groups of FFPE and R + FFPE, the RNA quality and quantity were statistically significantly lower when compared to MFPE, UFT and RNAlater. RT-qPCR results showed a comparable outcome in the group of MFPE and UFT, whereas the groups of FFPE and R + FFPE did not result in a correctly amplified gene product. Sample fixation by means of methacarn is of high interest for clinical samples to allow a combination of histological, immunohistological and biomolecular analysis. The implementation of such evaluation method in clinical research may allow a deeper understanding of the processes of bone formation and regeneration.
Hepatic cells are sensitive to internal and external signals. Ethanol is one of the oldest and most widely used drugs in the world. The focus on the mechanistic engine of the alcohol-induced injury has been in the liver, which is responsible for the pathways of alcohol metabolism. Ethanol undergoes a phase I type of reaction, mainly catalyzed by the cytoplasmic enzyme, alcohol dehydrogenase (ADH), and by the microsomal ethanol-oxidizing system (MEOS). Reactive oxygen species (ROS) generated by cytochrome (CYP) 2E1 activity and MEOS contribute to ethanol-induced toxicity. We aimed to: (1) Describe the cellular, pathophysiological and clinical effects of alcohol misuse on the liver; (2) Select the biomarkers and analytical methods utilized by the clinical laboratory to assess alcohol exposure; (3) Provide therapeutic ideas to prevent/reduce alcohol-induced liver injury; (4) Provide up-to-date knowledge regarding the Corona virus and its affect on the liver; (5) Link rare diseases with alcohol consumption. The current review contributes to risk identification of patients with alcoholic, as well as non-alcoholic, liver disease and metabolic syndrome. Additional prevalence of ethnic, genetic, and viral vulnerabilities are presented.
Mitochondrial RNA granules (MRGs) are membraneless, highly specialized compartments that play an essential role in the post-transcriptional regulation of mitochondrial gene expression. This regulation is crucial for maintaining energy production, controlling metabolic functions and ensuring homeostasis in cells. Dysregulation of mitochondrial genes has been linked to various human diseases, including neurodegenerative and metabolic disorders as well as certain types of cancer.
MRGs are composed of different RNA species, including mitochondrial precursor RNA (pre-RNA), mature tRNAs, rRNAs and mRNAs complexed with multiple proteins involved in RNA processing and mitoribosome assembly. However, despite the significance of MRGs, their protein composition, structural organization, stability and dynamics during stress conditions remain elusive. In the study reported here, I adopted a three-step approach to address the aforementioned fundamental issues.
First and foremost, I identified the protein composition of MRGs and unveiled their architectural complexity. To characterize the MRG proteome, I applied the cutting-edge TurboID-based proximity labeling approach combined with quantitative mass spectrometry. Proximity labeling was conducted on 20 distinct MRG-associated human proteins, resulting in the identification of more than 1,700 protein-protein interactions. This expansive dataset enabled me to create a comprehensive network, providing valuable insights into both the (sub)architecture as well as the core structure of MRGs in-depth.
Secondly, I investigated the spatio-temporal dynamics of MRGs under various mitochondrial stress conditions. To monitor the morphological alterations and compositional changes of MRGs, I utilized time-resolved confocal fluorescence microscopy and proteomics, respectively. In this analysis, I applied IMT1, the first specific inhibitor that selectively targets mitochondrial transcription. Using this methodology, I pinpointed precise conditions that triggered MRGs’ disassembly during stress, followed by their reassembly when nascent RNA production was restored. The results of this examination elucidate that MRGs are highly dynamic and stress adaptive structures, capable of rapid dissolution and reassembly, a process closely connected to mitochondrial transcription.
Thirdly, I aimed to explore the impact of RNA turnover on MRGs’ integrity during stress, employing confocal fluorescence microscopy and quantitative real-time PCR. I observed that depletion of MRG proteins associated with RNA degradation counteracts MRGs’ disassembly under stress conditions, a phenomenon attributed to the accumulation of double-stranded RNA (dsRNA). These results emphasize the critical role of pre-RNA turnover in maintaining MRG integrity and reveal that MRGs can be stabilized by dsRNA.
Taken together, the comprehensive investigation reported in this thesis has substantially broadened and deepened our understanding of MRGs’ complexity. By identifying their molecular structure and dynamics, I have gained significant insights into the fundamental characteristics and biological functions of MRGs in cellular processes. This knowledge contributes to the identification of disease-related pathways linked to mitochondrial gene expression and may inspire future studies to develop novel therapeutic approaches.
Aim
To compare overall mortality (OM), cancer-specific mortality (CSM), and other cause mortality (OCM) rates between radical prostatectomy (RP) versus radiotherapy (RT) in clinical node-positive (cN1) prostate cancer (PCa).
Materials and Methods
Within Surveillance, Epidemiology, End Results (SEER) (2004–2016), we identified 4685 cN1 PCa patients, of whom 3589 (76.6%) versus 1096 (24.4%) were treated with RP versus RT. After 1:1 propensity score matching (PSM), Kaplan–Meier plots and Cox regression models tested the effect of RP versus RT on OM, while cumulative incidence plots and competing-risks regression (CRR) models addressed CSM and OCM between RP and RT patients. All analyses were repeated after the inverse probability of treatment weighting (IPTW). For CSM and OCM analyses, the propensity score was used as a covariate in the regression model.
Results
Overall, RT patients were older, harbored higher prostate-specific antigen values, higher clinical T and higher Gleason grade groups. PSM resulted in two equally sized groups of 894 RP versus 894 RT patients. After PSM, 5-year OM, CSM, and OCM rates were, respectively, 15.4% versus 25%, 9.3% versus 17%, and 6.1% versus 8% for RP versus RT (all p < 0.001) and yielded respective multivariate hazard ratios (HRs) of 0.63 (0.52–0.78, p < 0.001), 0.66 (0.52–0.86, p < 0.001), 0.71 (0.5–1.0, p = 0.05), all favoring RP. After IPTW, Cox regression models yielded HR of 0.55 (95% confidence interval [CI] = 0.46–0.66) for OM, and CRR yielded HRs of 0.49 (0.34–0.70) and 0.54 (0.36–0.79) for, respectively, CSM and OCM, all favoring RP (all p < 0.001).
Conclusions
RP may hold a CSM advantage over RT in cN1 PCa patients.
Research in social insects has shown that hydrocarbons on their cuticle are species-specific. This has also been proven for Diptera and is a promising tool for identifying important fly taxa in Forensic Entomology. Sometimes the empty puparia, in which the metamorphosis to the adult fly has taken place, can be the most useful entomological evidence at the crime scene. However, so far, they are used with little profit in criminal investigations due to the difficulties of reliably discriminate among different species. We analysed the CHC chemical profiles of empty puparia from seven forensically important blow flies Calliphora vicina, Chrysomya albiceps, Lucilia caesar, Lucilia sericata, Lucilia silvarum, Protophormia terraenovae, Phormia regina and the flesh fly Sarcophaga caerulescens. The aim was to use their profiles for identification but also investigate geographical differences by comparing profiles of the same species (here: C. vicina and L. sericata) from different regions. The cuticular hydrocarbons were extracted with hexane and analysed using gas chromatography-mass spectrometry. Our results reveal distinguishing differences within the cuticular hydrocarbon profiles allowing for identification of all analysed species. There were also differences shown in the profiles of C. vicina from Germany, Spain, Norway and England, indicating that geographical locations can be determined from this chemical analysis. Differences in L. sericata, sampled from England and two locations in Germany, were less pronounced, but there was even some indication that it may be possible to distinguish populations within Germany that are about 70 km apart from one another.
With the introduction of the virtual allocation crossmatch in the Eurotransplant (ET) region in 2023, the determination of unacceptable antigen mismatches (UAM) in kidney transplant recipients is of utmost importance for histocompatibility laboratories and transplant centers. Therefore, a joined working group of members from the German Society for Immunogenetics (Deutsche Gesellschaft für Immungenetik, DGI) and the German Transplantation Society (Deutsche Transplantationsgesellschaft, DTG) revised and updated the previous recommendations from 2015 in light of recently published evidence. Like in the previous version, a wide range of topics is covered from technical issues to clinical risk factors. This review summarizes the evidence about the prognostic value of contemporary methods for HLA antibody detection and identification, as well as the impact of UAM on waiting time, on which these recommendations are based. As no clear criteria could be determined to differentiate potentially harmful from harmless HLA antibodies, the general recommendation is to assign all HLA against which plausible antibodies are found as UAM. There is, however, a need for individualized solutions for highly immunized patients. These revised recommendations provide a list of aspects that need to be considered when assigning UAM to enable a fair and comprehensible procedure and to harmonize risk stratification prior to kidney transplantation between transplant centers.
Inflammation is a crucial host defense mechanism activated in response to injury or infection. Its primary goal is to eliminate the source of the disturbance, repair the damaged tissue, and restore homeostasis. Inflammatory processes can be recognized through increased blood flow, higher vascular permeability, and the recruitment of leukocytes and plasma proteins to the tissue. A pathogen-induced inflammation triggers various pro- and anti-inflammatory processes. Local tissue cells and Toll-like receptors call upon innate immune cells like neutrophils, dendritic cells (DCs), and monocytes to respond to the intruder. They move across the endothelium and respond to local signals by releasing mediators or cytotoxic compounds, phagocytosing, or polarizing. To study local pathogen-induced inflammation, a zymosan-induced inflammation model was used in the hind paws of mice, which caused a Toll-like receptor 2 mediated inflammation. Multi-Epitope-Ligand-Cartography (MELC) was used for multiple sequential immunohistochemistry with 40 different antibodies on the same tissue. Bioinformatic analysis and graphical representation revealed a specific inflammatory architecture consisting of three major areas based on macrophage polarization and their cellular neighborhoods: a core region containing the pathogen, a pro-inflammatory region containing M1-like macrophages, and a region containing anti-inflammatory cells. This discovery highlights the coexistence of pro- and antiinflammatory processes during an ongoing inflammation and challenges the concept of a gradual temporal transition from pro- to anti-inflammation. Flow cytometry of the whole paw was performed to support and refine the MELC results. Eosinophils were used as a specific immune cell population to investigate their role in the inflammatory structure. They were found to be present in all three inflammatory regions, adapting their cytokine profile according to their localization. Depleting eosinophils reduced Interleukin 4 (IL-4)- levels, increased edema formation, and mechanical and thermal hypersensitivities during inflammation resolution. In the absence of eosinophils, pro- and anti-inflammatory region could not be determined in the inflammatory architecture, neutrophil numbers increased, and efferocytosis and M2-macrophage polarization were reduced. IL-4 administration restored these regions, normalized neutrophil numbers, efferocytosis, M2-macrophage polarization, and resolution of zymosan-induced hypersensitivity. The results show that eosinophils expressing IL-4 support the resolution of inflammation by enabling the development of an anti-inflammatory framework that encloses pro-inflammatory regions.
In Deutschland leidet ca. jeder zehnte Mensch über 40 Jahren an einer chronischen Einschränkung seiner Nierenfunktion. Nicht wenige davon sind im Laufe der Erkrankung auf eine Nierenersatztherapie angewiesen. Die Ursachen für eine Nierenschädigung sind vielfältig. Als neuartiger und vielversprechender Therapieansatz werden aktuell Mesenchymale Stamm-/Stromazellen (MSC) als Therapeutikum für diverse Nierenerkrankungen getestet. Erste Ergebnisse klinischer Phase-I-Studien zeigen, dass MSC sicher als Immunsuppressivum nach Nierentransplantation angewendet werden können. Auch für weitere Erkrankungen der Niere sind erste klinische Studien am Laufen. MSC gelten als regenerativ, immunsupprimierend und antientzündlich. Dennoch gibt es noch einige Limitationen. Nach der Transplantation der Zellen ist das Wachstum der Zellen oft eingeschränkt und es kommt zur vermehrten Apoptose. Auch wird immer wieder ein paradoxes und entzündungsförderndes Verhalten der MSC am Wirkort beobachtet. Ein wichtiger Lösungsansatz ist eine in vitro Vorbehandlung der MSC zur Modulierung der zellulären Eigenschaften. In dieser Arbeit wurden drei Substanzen und Arzneimittel auf ihre Fähigkeit untersucht, die entzündungshemmenden Eigenschaften der MSC zu verbessern und die entzündungsfördernden zu unterdrücken. Der Fokus lag hierbei auf dem Arzneimittel Niclosamid und den beiden bisher noch nicht zugelassenen Substanzen Berberin und Gedunin, die alle in vitro und in vivo bereits erste vielversprechende antientzündliche Wirkungen bewiesen haben. Für diese Arbeit wurden MSC aus Fettgewebe isoliert (ASC) und mit LPS oder einem Cytokin-Mix (Mischung aus TNF-α, IFN-γ und IL-1β) sowie den drei Substanzen stimuliert. Untersucht wurden im Anschluss die mRNA-Expressionen der gängigsten proinflammatorischen (TNF-α, IL-6, TLR-4, ICAM-1, HLA-DR) und antiinflammatorischen Marker (IDO, IL-10), sowie mittels ELISA die Protein-Freisetzung von IL-6 und IL-8. Die vielversprechendsten Ergebnisse ließen sich durch Berberin hervorrufen. Hier zeigte sich eine deutliche Senkung der IL-8-Konzentration im ELISA. Die Anwendung des Gedunin hatte keine signifikante Wirkung auf die ASC. Niclosamid hingegen scheint widererwarten sogar entzündungsfördernd zu wirken, in dem es die IL-6-, ICAM-1-mRNA-Expression steigerte und die IDO-mRNA-Expression absenkte. Unter den drei getesteten Subtanzen hat Berberin die beste Wirkung bewiesen. Nach weiterer Testung könnte eine Anwendung mit Berberin als in vitro Präkonditionierung von MSC vielversprechend sein. Die Verwendung von Niclosamid hingegen sollte vermieden werden, die Wirkung von Gedunin müsste genauer untersucht werden.
Einleitung: Allergisches Asthma bronchiale ist eine chronische Atemwegserkrankung, deren Prävalenz zunimmt. Angesichts der immensen gesellschaftlichen und individuellen Belastung durch Asthma ist es dringend erforderlich, neue Strategien zur Behandlung der Krankheit zu entwickeln. Immunologisch ist allergisches Asthma durch ein Ungleichgewicht zwischen TH2-Zellen und TH1-Zellen gekennzeichnet, das durch regulatorische T-Zellen (Tregs) reguliert wird. Tregalizumab ist ein monoklonaler IgG-Antikörper, der Tregs selektiv aktiviert. Ziel der vorliegenden Arbeit war es daher, die Wirkung von Tregalizumab auf die allergeninduzierte allergische Entzündung bei Patienten mit Hausstaubmilbenallergie anhand eines bronchialen Provokationsmodells zu untersuchen.
Methoden: In einer prospektiven, randomisierten, doppelblinden und placebokontrollierten Studie wurden 42 Probanden mit allergischem Asthma und Hausstaubmilbenallergie zwölf Wochen lang mit Tregalizumab 100 mg oder Placebo behandelt. Bronchiale Provokation mit HSM wurde vor (V4) und nach (V17) Tregalizumab-Gabe durchgeführt. Induziertes Sputum (Visite V5, V16, V18) und peripheres Blut (Visite V4, V5, V18) wurden entnommen und Zelldifferenzierung, Zytokine und Transkriptionsfaktoren wurden durch Mikroskopie, Durchflusszytometrie bzw. RT-PCR bewertet.
Ergebnisse: Sowohl in der Verum- als auch in der Placebogruppe zeigte sich zwischen Visite V5 (24 Stunden nach Provokation) und vier Wochen nach Provokation bei Visite V16 (p<0,05) ein signifikanter Rückgang des Anteils eosinophiler Granulozyten (wie auch des ECP-Levels). Interessanterweise konnte bei V18 (24 Stunden nach Provokation) nur in der Placebogruppe ein signifikanter Anstieg beobachtet werden (p<0,01). Die Konzentration des TH-2-Zytokins IL-5 nahm zwischen V5 und V16 in der Verumgruppe signifikant ab (p<0,05). Zwischen V16 und V18 konnte wiederum nur in der Placebogruppe ein signifikanter Anstieg festgestellt werden (p<0,01). Dieser spätere Effekt wurde auch auf Protein- und Transkriptionsebene und im peripheren Blut sowie bei der Expression des Transkriptionsfaktors FoxP3 gefunden. Auf der Ebene der TH-1-Zytokine konnten keine signifikanten Veränderungen festgestellt werden.
Diskussion: Der Anteil eosinophiler Granulozyten, die Konzentration von IL-5 in Blut und Sputum sowie die Konzentration von ECP im Sputum haben sich als gute Parameter zur Beurteilung der Entzündungsreaktion bei unseren Studienteilnehmern erwiesen. Wir haben gezeigt, dass allergische Entzündungen, die durch das Provokationsmodell verursacht wurden, durch die analysierten Parameter im Sputum, aber auch im Blut gut überwacht werden konnten. Ein klinischer Effekt von Tregalizumab konnte in dieser Studie jedoch nicht festgestellt werden und dieses Ergebnis stimmt gut mit der Analyse der Entzündungsparameter im induzierten Sputum überein.
Das Schilddrüsenkarzinom (SK) ist die häufigste bösartige endokrine Tumorerkrankung. Während das nicht-metastasierte und nicht-mutierte papilläre Schilddrüsenkarzinom (PSK) und das follikuläre Schilddrüsenkarzinom (FSK) eine gute Heilungschance aufweisen, zeigen die mutierten und metastasierten Varianten des PSK und FSK sowie das anaplastische Schilddrüsenkarzinom (ASK) weiterhin eine schlechte Prognose. Die Entwicklung von Therapieresistenzen stellen hierbei ein Hauptproblem in der Behandlung des fortgeschrittenen Schilddrüsenkarzinoms dar.
In den letzten Jahren wurden in Studien zunehmend Tumor-initiierende Zellen (TIZ) beschrieben, welche eine kleine Subpopulation von Zellen mit der Fähigkeit zur Selbsterneuerung, Tumorinitiierung und Entwicklung von Therapieresistenzen von Tumoren darstellen. Die Existenz von TIZ wurde auch im SK nachgewiesen. Ein entscheidender Faktor für die Persistenz von TIZ ist die Hypoxie, welche über eine Veränderung des Tumormikromilieus und des Zellmetabolismus zur Entstehung von Therapieresistenzen beiträgt. Ein durch Hypoxie hochreguliertes Enzym ist die Carboanhydrase IX (CAIX). CAIX wird hauptsächlich von Tumorzellen exprimiert und katalysiert die Reaktion von Kohlendioxid zu Bicarbonat und einem Proton und trägt damit zur Säurepufferung der Tumorzelle bei. CAIX stellt somit einen entscheidenden Faktor für das Überleben von Tumorzellen in einem hypoxischen Milieu dar. Des Weiteren ist eine erhöhte Expression von CAIX mit einem schlechten Patienten-Outcome assoziiert, wie z.B. im Brustkrebs. Diese Eigenschaften machen CAIX zu einem attraktiven Angriffspunkt einer zielgerichteten Tumortherapie. Die vorliegende Studie hat zum Ziel, die Expression von CAIX sowie dessen biologische Rolle im Schilddrüsenkarzinom näher zu untersuchen.
Hierzu wurden Proben von 114 SK-Patienten immunhistochemisch auf eine CAIX-Expression untersucht und mit tumorfreiem Schilddrüsengewebe verglichen. Hierbei waren unterschiedliche SK-Subtypen vertreten. Für eine weitere Validierung der Expressionsdaten erfolgte die Auswertung eines Datasets von „The Cancer Genome Atlas“ (TCGA) mithilfe von cBioportal. Da die Hypoxie ein wichtiger Faktor für die Persistenz von TIZ ist, wurde die CAIX-Expression in Tumorsphären, ein in vitro Nachweis von TIZ-Aktivität, mittels der Durchflusszytometrie bestimmt und mit der CAIX-Expression von Monolayern verglichen. Als SK-Zelllinien wurden BCPAP (PSK), FTC 133 (FSK) und 8505 C (ASK) verwendet. Anschließend wurde mithilfe der Polymerasekettenreaktion und Immunofluoreszenzfärbung untersucht, ob eine CAIX-Expression in den Tumorsphären mit der Expression von bereits bekannten Stammzellmarkern, u.a. NANOG, assoziiert ist. Die Unterschiede der CAIX-Expression, nach Inkubation der Monolayer jeweils in Normoxie und Hypoxie, wurden mittels Durchflusszytometrie bestimmt. Mithilfe eines genetischen CAIX-Knockdowns sowie einer pharmakologischen Inhibition mit dem CAIX-Inhibitor Methazolamid (MZM) wurde die Tumorzellproliferation und -Sphärenbildung unter Normoxie und Hypoxie bestimmt. Zusätzlich wurde der Einfluss von MZM auf die Apoptose und den Zellzyklus untersucht.
Immunhistochemische Färbungen der Gewebeproben von SK-Patienten zeigten, dass die CAIX-Expression sowohl im PSK und FSK als auch im ASK im Vergleich zum tumorfreien Schilddrüsengewebe erhöht war. Des Weiteren zeigte die klinisch-pathologische Datenanalyse, dass eine erhöhte CAIX-Expression mit dem Auftreten von Lymphknotenmetastasen im differenzierten SK assoziiert war. Auch die Analyse des TCGA-Datasets bestätigte, dass eine erhöhte Expression der CAIX-mRNA mit einem fortgeschrittenen Tumorstadium, Fernmetastasen und mit einem kürzeren Gesamt-Überleben von SK-Patienten korrelierte. Die weiteren funktionellen in vitro Untersuchungen ergaben, dass die CAIX-Expression in den Tumorsphären im Vergleich zu Monolayern erhöht und mit einer erhöhten Expression von Stammzellmarkern assoziiert war. Ein genetischer CAIX-Knockdown und eine CAIX-Inhibition mit MZM führten über eine Induktion der Apoptose und eines Zellzyklusarrests zu einer verminderten Tumorzellproliferation und Sphärenbildung.
Zusammenfassend deuten die Ergebnisse darauf hin, dass CAIX ein vielversprechendes Zielmolekül für eine gezielte Tumortherapie des fortgeschrittenen SK ist. Um diese Hypothese bestätigen zu können, sind jedoch weitere prospektive Analysen von Patientenproben sowie funktionelle in vivo Untersuchungen am SK nötig.
Einleitung: Die Zentrale Notaufnahme (ZNA) stellt eine Schnittstelle zwischen prä- und innerklinischer Versorgung dar. Das Spektrum der Krankheitsbilder erstreckt sich über jegliche Fachrichtungen und variiert von harmlosen Banalitäten bis zu akuten Notfällen. Eine sichere und suffiziente Primärversorgung ist die Basis eines qualitativ-hochwertigen Gesundheitssystems.2 Verspätete oder falsche Diagnosen in der ZNA sind mit 10-30 % keine Seltenheit.
Dies ist nicht nur für den individuellen Patienten belastend, es bedeutet auch einen zusätzlichen Ressourcenverbrauch und eine finanzielle Belastung für das Gesundheitssystem. Clinical Decision Support Systems (CDSS) haben das Potenzial, sowohl professionelle Anwender als auch Laien bei ihrer Diagnosefindung zu unterstützen. Fragestellung: Ziel der Arbeit ist es herauszufinden, welchen Einfluss der Diagnosezeitpunkt auf das Outcome von Patienten mit Abdominalschmerzen in der ZNA hat und inwiefern ein CDSS das Potenzial hat, die genannten Punkte zu beeinflussen.
Methoden: Es handelte sich um eine prospektive, doppelt verblindete Beobachtungsstudie. Patienten, die sich mit Abdominalschmerzen in der Notaufnahme vorstellten, gaben ihre Symptome in die Ada-App ein. Sowohl die Diagnosevorschläge der App als auch die Verdachtsdiagnosen des behandelnden Arztes wurden dokumentiert und verglichen. Weitere erhobene Parameter waren die Verwendung von apparativer Diagnostik, die vergangene Zeit bis zur endgültigen Diagnosestellung, das Auftreten von Komplikationen, die Komorbidität und Mortalität sowie die Länge des Krankenhausaufenthalts. Das Follow-Up erfolgte zu verschiedenen Zeitpunkten bis zu Tag 90. Für die Analyse wurden die 450 Patienten anhand des Zeitpunkts ihrer Diagnosestellung in Gruppen "früh" (Tag 0) und "spät" (Tag 1-24) eingeteilt.
Ergebnisse: Im Vergleich zur „frühen“ Gruppe, hatte die Gruppe der „spät“ diagnostizierten Patienten einen höheren Anteil von Männern (45.2% (n=168/372) versus 60.3 % (n=47/78); p=0.018), im Schnitt einen höheren Charlson Comorbidity Index (0.7 versus 1.1; p=0.045) und im Schnitt einen höheren RAI-C Score (8.06 versus 9.9; p<0.001) am Tag ihrer Vorstellung. Bei den „spät“ diagnostizierten blieben weniger Patienten komplikationsfrei (57.0 % 49 (n=212/372) versus 17.9% (n=14/78); p<0.001), es traten mehr Major-Komplikationen auf (8.9% (n=33/372) versus 17.9% (n=14/78); p=0.024), analog dazu war der Comprehensive Complication Index höher (13.1 versus 25.6; p<0.001) und sie verweilten länger im Krankenhaus (2.6 Tage versus 6.7 Tage; p<0.001). Zudem nahmen sie signifikant mehr apparative Diagnostik in Anspruch.
Die behandelnden Ärzte konnten in 82.6% der Fälle (n=372/450) am Tag der Vorstellung die korrekte Diagnose stellen. Die Ada-App konnte in insgesamt 52% der Fälle (n=234/450) die korrekte Diagnose unter ihren Diagnoseverschlägen nennen.
Schlussfolgerung: Multimorbide Patienten scheinen anfälliger zu sein für falsche und verspätete Diagnosen. Ein später Diagnosezeitpunkt korreliert mit der vermehrten Nutzung apparativer Diagnostik, einem komplikationsreicheren Verlauf, einer höheren Komorbidität und einem längeren Krankenhausaufenthalt.
Die Ada-App ist den Ärzten zwar unterlegen, dennoch ist Potenzial vorhanden.
Für Ärzte kann die Ada-App eine Unterstützung im Rahmen der Diagnosefindung darstellen. Neben der Ressourcenentlastung kann sie vor Fehlannahmen und frühzeitigen Schlussfolgerungen schützen und auf weitere mögliche Differentialdiagnosen hinweisen. Die Ada-App stellt für Laien mit Sicherheit eine Weiterentwicklung gegenüber der simplen Symptomsuche über das Internet dar, dennoch sollten weitere Studien den Nutzen und die Sicherheit der App überprüfen.
Weltweit gibt es laut WHO ca. 58 Millionen Menschen mit einer chronischen Hepatitis-C-Virus (HCV) Infektion und jährlich stecken sich ca. 1,5 Millionen Menschen neu mit diesem Virus an (Stand 2019). Da die Folge einer chronischen Hepatitis-C-Virus Infektion eine potenziell tödlich verlaufende Leberzirrhose oder die Entwicklung eines Hepatozellulären Karzinoms sein können, ist eine frühe Diagnose und eine adäquate Therapie eine wichtige Aufgabe in der Medizin.
Die bisherige Therapie erfolgte mittels pegyliertem Interferon und Ribavirin und seit einigen Jahren auch interferonfrei mittels Direkter Antiviraler Agenzien (DAA). Vor allem beim älteren Therapieregime konnten viele Nebenwirkungen und häufiger auch ein Therapieversagen auftreten, sodass ein leicht zu gewinnender Biomarker nützlich wäre, der die Patienten mit Therapieversagen frühzeitig und im besten Fall sogar vor Therapiebeginn detektieren kann.
In der vorliegenden Arbeit wurden die Spiegel von extrazellulär im Blut zirkulierender, leberspezifischer microRNA miR-122 auf Eigenschaften als solche potenzielle Biomarker untersucht. Dazu wurden die Patientenseren von insgesamt 60 Patienten mit chronischer Hepatitis-C-Virus Infektion analysiert, die mittels pegyliertem Interferon und Ribavirin behandelt wurden. Vor, während und nach der Therapie wurden verschiedene Laborparameter sowie die miR 122 in den Patientenseren bestimmt. 20 dieser Patienten zeigten ein dauerhaftes Ansprechen auf die Therapie (sustained virological response = SVR), 20 zeigten nach einem initialen Therapieansprechen ein Rückfall der Erkrankung (Relapse) und 20 Patienten sprachen gar nicht auf die Therapie an (Non-Responder = NR).
Zunächst wurden die sogenannten Baseline-Charakteristika der Patienten vor Therapiebeginn untersucht. Dabei konnten wir jedoch keinen Unterschied zwischen den Patientengruppen hinsichtlich der Alanin-Aminotransferase (ALT) und Aspartat-Aminotransferase (AST), zwei Laborparameter zur Bestimmung einer Leberschädigung, sowie der HCV-RNA, ein Parameter zur Bestimmung der Viruslast bei Patienten mit einer HCV-Infektion, feststellen.
Auch die miR-122-Spiegel zeigten vor Therapiebeginn keinen signifikanten Unterschied zwischen den drei Patientengruppen. Daraus wurde geschlossen, dass man die miR-122 vor Therapiebeginn nicht als prognostischen Marker für einen Therapieerfolg verwenden kann.
Beim Vergleich der miR-122-Spiegel mit den Laborparametern konnte eine signifikante Korrelation zwischen der miR-122 und der ALT, AST und der Gamma-Glutamyl-Transferase (GGT) festgestellt werden. Die miR-122 scheint somit ähnlich wie die anderen Laborparameter eine Leberzellschädigung widerzuspiegeln.
Nach dem Therapiebeginn konnte bereits ab Woche 4 ein signifikanter Unterschied zwischen den SVR und Non-Respondern sowie zwischen den Relapsepatienten und den Non-Respondern festgestellt werden. Jedoch war der Unterschied zwischen den SVR und den Relapse-Patienten nicht signifikant, sodass man weiterhin keine Unterscheidung dieser beiden Patientengruppen machen konnte.
Auch die ALT- und HCV-RNA-Spiegel zeigten einen ähnlichen Verlauf. In den Gruppen der SVR und Relapse-Patienten zeigte sich im Laufe der Therapie ein Rückgang der Parameter wohingegen die Gruppe der Non-Responder keine signifikante Dynamik aufwies.
Zum Schluss wurden die miR-122-Spiegel 12 bzw. 24 Wochen nach Therapieende bestimmt, dem sogenannten Zeitpunkt des Follow-Up bei dem der Therapieerfolg laut Leitlinie mit Hilfe der HCV-RNA-Messung bestimmt wird. Dabei konnte ein signifikanter Unterschied zwischen den miR-122-Spiegeln bei den SVR-Patienten und den anderen beiden Patientengruppen festgestellt werden.
In Zusammenschau dieser Ergebnisse kann man sagen, dass die miR-122 gut geeignet ist um ähnlich wie die HCV-RNA den Therapieverlauf widerzuspiegeln. Als prognostischer Parameter bzw. Biomarker für ein Therapieansprechen ist sie jedoch nicht geeignet, da keine Unterscheidung zwischen den einzelnen Patientengruppen vor Therapiebeginn möglich ist und während der Therapie lediglich die Non-Responder und nicht die Relapse-Patienten detektiert werden können.
Im Fokus der vorliegenden Arbeit stand die Fragestellung, inwieweit ORF10 von B. recurrentis, dem Erreger des Läuserückfallfiebers, mit verschiedenen Komplementkomponenten interagieren kann.
Mit funktionellen Komplementtests konnte gezeigt werden, dass ORF10 den klassischen, den alternativen sowie den Lektin-Weg inhibiert, wobei sich die stärkste Inhibition gegenüber dem alternativen Weg manifestierte. Darüber hinaus ließ sich in einem Zell-basierten Hämolyse-Assay eine Inhibition des terminalen Komplementweges durch ORF10 nachweisen.
Die durchgeführten Bindungsanalysen mit verschiedenen Komplementkomponenten führten zu dem Ergebnis, dass ORF10 mit C1q, C1s, C3, C3b, C4b und C5 interagiert und diese Protein-Protein-Interaktion mit den Komplementkomponenten C1q, C3, C3b und C4b durch einen dosisabhängigen Verlauf charakterisiert ist. Eine Bindung von C1r, C2, C4, FB, FH sowie FI konnte jedoch nicht nachgewiesen werden.
Auf Basis der modellierten Struktur von ORF10 wurden mithilfe der In-vitro-Mutagenese drei verschiedene Varianten generiert, die jedoch nicht affinitätschromatographisch aus E. coli-Zelllysaten isoliert werden konnten und deshalb nicht für weiterführende funktionelle Analysen zur Verfügung standen.
Die Ergebnisse der Serumbakterizidie-Tests mit einem „gain of function“-Borrelienstamm, welcher ORF10 heterolog produzieren sollte, ergaben, dass keine erhöhte Resistenz gegenüber Humanserum nachgewiesen werden konnte. Inwieweit ORF10 bei der intrinsischen Serumresistenz von B. recurrentis beteiligt ist, lässt sich abschließend nicht vollumfänglich erklären.
Background: Survival data regarding cytoreductive nephrectomy (CN) in metastatic renal cell carcinoma (mRCC) patients according to the type and extent of tumor-associated vascular thrombus are scarce.
Objective: To test for survival differences in mRCC patients treated with CN according to the type and extent of tumor-associated vascular thrombus.
Design, setting, and participants: Within Surveillance, Epidemiology, and End Results Research Plus (2004–2017), we identified CN mRCC patients with renal vein (pT3a-TT) versus infradiaphragmatic inferior vena cava (IVC; pT3b) versus supradiaphragmatic IVC tumor thrombus/IVC invasion (pT3c).
Outcome measurements and statistical analysis: Overall survival (OS) was addressed in Kaplan-Meier and Cox regression analyses, in addition to 3-mo landmark analyses.
Results and limitations: Of 2170 mRCC patients, 1880 (87%), 204 (9%), and 86 (4%) harbored pT3a-TT, pT3b, and pT3c, respectively. The respective median OS periods were 21, 23, and 12 mo (p < 0.001). In multivariable Cox regression models, pT3c stage, but not pT3b stage, was an independent predictor of higher overall mortality (hazard ratio [HR]: 1.37; 95% confidence interval [CI]: 1.09–1.73; p = 0.007), as well as in 6-mo landmark analyses (HR: 1.36; 95% CI: 1.02–1.80; p = 0.04). In the sensitivity analysis, relying on all pT3a patients, the predictor status of pT3c stage remained unchanged (HR: 1.37; 95% CI: 1.09–1.71; p = 0.007). Limitations have to be addressed regarding the sample size and the retrospective design of the current study.
Conclusions: Although overall mortality is significantly higher in pT3c mRCC patients than in their pT3b and pT3a-TT counterparts, these individuals may still expect 12-mo or better OS after CN versus virtually 2-yr OS in their pT3a and pT3b counterparts.
Patient summary: In this study, we looked at the survival outcomes of metastatic renal cell carcinoma patients who presented with tumor thrombus at cytoreductive nephrectomy. Even though these patients with most advanced tumor thrombus stage demonstrated lower survival rates, the median overall survival was still 1 yr.
Middle-aged persons with multimorbidity have to take their illnesses into account in their daily work, family and leisure activities. The MuMiA project aims to identify early preventive measures that make it easier for those between 30 and 60 years of age with multiple chronic diseases to manage their illnesses in their everyday lives. An interdisciplinary workshop and interviews with multimorbid middle-aged adults and their principal healthcare providers will be used to collect information on the management of care in the contexts of patients’ daily work, family and leisure activities. Data obtained in the interviews will be coded inductively and analysed using content analysis. Workshop outputs will be transcribed and evaluated by the authors. This study has received ethical approval from the Faculty of Medicine Ethics Committee of Goethe University (2021-47). The project will generate prevention recommendations that reflect the experiences of middle-aged persons living with multimorbidity and the views of their principal healthcare providers. The findings will be disseminated via conferences and peer-reviewed publications.
Development of a multidimensional pain questionnaire in professional dance (MPQDA): a pilot study
(2022)
Background: Pain is part of the everyday life of professional dancers. It can indicate health risks and impair the ability to work. Suitable screening tools can be used to identify pain and its risk potential. A comprehensive, multidimensional, differentiated assessment tool for pain in professional dance does not currently exist.
Methods: An initial questionnaire was developed in German and English and was assessed in a qualitative pretest. In a field study with a cross-sectional design including n = 72 dancers from Germany (n = 36 responses each in the English and German language versions), the questionnaire was optimized by item analysis, its psychometric properties (dimensionality, construct validity, reliability) were examined and the ability of the pain dimensions to classify the subjective ability to work in training was analyzed (ROC analysis).
Results: The developed Multidimensional Pain Questionnaire in Professional Dance (MPQDA) was reduced and optimized in its psychometric properties. Following questions were reduced in their items or answer categories: pain localizations (from 20 to 15 regions), accompanying symptoms (from 6 to 3 items), sensory and affective pain quality (from 20 to 10 items), pain frequency (from 4 to 3 answer categories), and the motives of working with pain (from 14 to 12 items). Regarding the subjective ability to work in training, the variables of the ability to work in rehearsals and in performances, as well as the accompanying symptoms of tension and mobility restrictions, showed a relatively good classification ability (Area under the Curve (AUC) ≥ 0.7 in the 95% confidence interval) and significant, moderate to strong correlations (Somers' D > 0.25, p < 0.05). The classification ability of the other pain dimensions was largely absent or poor.
Conclusion: The MPQDA differentiates various pain dimensions in professional dancers and is available in a compatible manner in German and English. The clinical relevance needs to be explored further in the future.
Up to the present, there has been a lack of studies on the skin health of professional and recreational dancers. Dancers are at risk of skin diseases due to contact with allergenic or irritating substances and working in humid environments. The aim of the present study was, therefore, to examine skin health in two different dance styles and training periods. Methods: Physical dermatological examination of professional dancers (PD; n = 35) and Latin American formation dancers (LD; n = 79) after a 4-week period of recovery (T0) and a period of high training or work load (T1). Results: PD are significantly more frequently affected by skin dermatoses than LD (T0, p = 0.004) (frontal traction alopecia, hair loss, facial seborrhoea, xerosis cutis of the trunk and extremities, and facial folliculitis). The following significant differences between the sexes were observed in the LD: more folliculitis of the trunk in male subjects (T0 and T1, p = 0.009), more frequent xerosis cutis of the extremities (p < 0.001) and perioral dermatitis in female subjects (T1, p = 0.043). Subjects with skin lesions trained more frequently, performed more times per year, and had longer dance experience. Discussion: Based on the findings, preventive measures for skin protection (especially informing dancers about skin health) are necessary. At the same time, further studies on this topic are important.
The deep fascia is intimately linked to skeletal muscle and may be involved in delayed onset muscle soreness (DOMS). The present study therefore explored the effect of eccentric exercise on fascia stiffness and its relation with DOMS. Healthy active male adults (n = 19, 27 ± 4 years) performed 6 x 10 maximal eccentric knee flexions using an isokinetic dynamometer. Before (baseline) as well as immediately (T0), 1 hour (T1), and each day up to 72 hours (T24 to T72) afterwards, shear wave elastography was used to measure the mechanical stiffness of the biceps femoris muscle and the overlying fascia. As a surrogate of DOMS, pain upon palpation was captured by means of a 100mm visual analogue scale. While muscle stiffness remained unchanged (p > 0.05), deep fascia stiffness increased from baseline to T24 (median: 18 kPa to 21.12 kPa, p = 0.017) and T72 (median: 18 kPa to 21.3 kPa, p = 0.001) post-exercise. Linear regression showed an association of stiffness changes at T24 and pressure pain at T72 (r2 = 0.22, p < 0.05). Maximal eccentric exercise leads to a stiffening of the fascia, which, in turn, is related to the magnitude of future DOMS. Upcoming research should therefore gauge the effectiveness of interventions modifying the mechanical properties of the connective tissue in order to accelerate recovery.
Background: Primary viral myocarditis associated with severe acute respiratory syndrome coronavirus 2 (SARS-Cov2) infection is a rare diagnosis.
Case presentation: We report the case of an unvaccinated, healthy patient with cardiogenic shock in the context of a COVID-19-associated myocarditis and therapy with simultaneous veno-arterial extracorporeal membrane oxygenation (VA-ECMO) and percutaneous left ventricular decompression therapy with an Impella. The aim of this review is to provide an overview of therapeutic options for patients with COVID-19-associated myocarditis.
Conclusions: The majority of patients required a combination of two assist devices to achieve sufficient cardiac output until recovery of left ventricular ejection fraction. Due to the rapid onset of this fulminant cardiogenic shock immediate invasive bridging therapy in a specialized center was lifesaving.
Introduction: Studies of vocational ballet students are sparce. In particular, there is a lack of gender comparisons. The aim of the present study, therefore, was to give a musculoskeletal and sociodemographic description of the typical vocational ballet student in gender comparison. Methods: In this study, n = 414 female and n = 192 male students of the John Cranko School (JCS), aged between 5 and 22 years (Mean ± SD: 13.9 ± 3.5), were examined by an experienced orthopedist and dance physician. Results: Males started ballet (5.8/8.2 years, p < 0.001) and training at later age than females (13.5/14.6 years, p < 0.05). There was a high prevalence of low body weight among both sexes; however, particularly among female participants (58.4/16.2%, p < 0.001). Both sexes showed a large external rotation of the hip (f/m: 59/62°, p < 0.001), a large turnout (f/m: 82/86°, p < 0.01), high values for plantarflexion of the ankle joint (f/m: 72/68°, p < 0.001) and dorsiflexion of the metatarsophalangeal joint of the big toe (f/m: 90/87°, p < 0.001). Discussion: Differences in ballet-specific characteristics between genders (f/m) are converging and are smaller than described in the past. The particularly high prevalence of low body weight among students in the vocational training sector, particularly among females, highlights the need for deeper diagnostic investigation.
Structural brain morphometry as classifier and predictor of ADHD and reward-related comorbidities
(2022)
Attention deficit/hyperactivity disorder (ADHD) is one of the most common neurodevelopmental disorders, and around two-thirds of affected children report persisting problems in adulthood. This negative trajectory is associated with high comorbidity with disorders like obesity, depression, or substance use disorder (SUD). Decreases in cortical volume and thickness have also been reported in depression, SUD, and obesity, but it is unclear whether structural brain alterations represent unique disorder-specific profiles. A transdiagnostic exploration of ADHD and typical comorbid disorders could help to understand whether specific morphometric brain changes are due to ADHD or, alternatively, to the comorbid disorders. In the current study, we studied the brain morphometry of 136 subjects with ADHD with and without comorbid depression, SUD, and obesity to test whether there are unique or common brain alterations. We employed a machine-learning-algorithm trained to classify subjects with ADHD in the large ENIGMA-ADHD dataset and used it to predict the diagnostic status of subjects with ADHD and/or comorbidities. The parcellation analysis demonstrated decreased cortical thickness in medial prefrontal areas that was associated with presence of any comorbidity. However, these results did not survive correction for multiple comparisons. Similarly, the machine learning analysis indicated that the predictive algorithm grouped most of our ADHD participants as belonging to the ADHD-group, but no systematic differences between comorbidity status came up. In sum, neither a classical comparison of segmented structural brain metrics nor an ML model based on the ADHD ENIGMA data differentiate between ADHD with and without comorbidities. As the ML model is based in part on adolescent brains, this might indicate that comorbid disorders and their brain changes are not captured by the ML model because it represents a different developmental brain trajectory.
Objectives: The range of motion (ROM) of the cervical spine and postural stability are important for an economical and motorically adequate adaptation of the body to any situation. Therefore, this study aims to analyze whether these two components of postural and movement control can be influenced by means of a splint in a centric position compared to habitual occlusion.
Methods: 38 recreational male athletes volunteered. Cervical spine ROM was recorded using an ultrasound system and the a pressure measuring plate for postural stability (length of center of pressure (CoP) movement, area of CoP). The two dental occlusion conditions employed were the habitual occlusion and wearing a splint in an idealized, condylar position close to the centric position. Level of significance was set at ρ ≤ 0.05.
Results: The cervical spine mobility increased significantly by wearing the splint regarding rotation to the left (+3.9%) and right (+2.7%) and lateral flexion to the left (+4.4%) and right (+6.7%). Wearing the splint reduced the area of sway deflections by about 31.5% in the bipedal stance and by about 2.4% (left) and 28.2% (right) in the unipedal stance. The CoP trace was reduced in the sagittal plane by approximately 8.2% in the right single-leg stance.
Conclusions: The major findings seem to demonstrate that wearing a splint that keeps the jaw close to the centric relation may increase the cervical ROM and may improve balance stability in male recreational athletes. Changing the jaw relation in athletes can possibly aid the release of performance potentials by improving coordination skills.
Background: In order to determine possible pathological deviations in body weight distribution and body sway, it is helpful to have reference values for comparison: gender and age are two main influencing factors. For this reason, it was the aim of the present study to present reference values for women between 51 and 60 years of age.
Methods: For this study, 101 subjectively healthy female Germans aged between 51 and 60 years (55.16 ± 2.89 years) volunteered and were required to stand in a habitual posture on a pressure measuring platform.
Results: The average BMI of this age group was 25.02 ± 4.55 kg/m². The left and right foot showed an almost evenly balanced load distribution with a median load of 52.33% on the left foot [tolerance interval (TR) 38.00%/68.03%; confidence interval (CI) 51.00%/53.33%] and 47.67% on the right foot [TR 31.97%/62.00%; CI 46.67%/49.00%]. The measured median load of the forefoot was 33.33% [TR 21.37%/54.60%; CI 30.67%/36.00%] and that of the rear foot was 66.67% [TR 45.50%/78.63%; CI 64.00%/69.33%]. The median body sway in the frontal plane was 11 mm [TR 5.70 mm/26.30 mm; CI 10.00 mm/11.67 mm] and that of the sagittal plane was 16 mm [TR 7.37 mm/34.32 mm; CI 14.67 mm/18.67 mm]. The median ellipse area was 1.17 cm² [TR 0.29 cm²/4.96 cm²; CI 0.98 cm²/1.35 cm²], the median ellipse width was 0.91 cm [TR 0.42 cm/1.9 cm; CI 0.84 cm/1.02 cm] and its height was 0.40 cm [TR 0.22 cm/0.89 cm; CI 0.38 cm/0.43 cm].
Conclusions: The left-to-right ratio is almost balanced. The load distribution of the forefoot to the rear foot is approximately 1:2. The median body sway values for the frontal and sagittal planes (11 and 16 mm, respectively) agree with other values. The values for the height, body weight and the BMI are comparable to the values of average German women at this age; therefore, the measured values show a presentable cross section of women in the 51–60 age group in Germany. The present data can be used as a basis for women aged 51–60 years and can support the detection of possible dysfunctions as well as injury prevention in the parameters of postural control.
Background: In the COVID-19 pandemic, numerous researchers postponed their patient and public involvement (PPI) activities. This was mainly due to assumptions on patients’ willingness and skills to participate digitally. In fact, digital PPI workshops differ from in-person meetings as some forms of non-verbal cues and body language may be missing and technical barriers may exist. Within our project HYPERION-TransCare we adapted our PPI workshop series for intervention development to a digital format and assessed whether these digital workshops were feasible for patients, health care professionals and researchers.
Methods: We used a digital meeting tool that included communication via audio, video and chat. Discussions were documented simultaneously on a digital white board. Technical support was provided via phone and chat during the workshops and with a technical introduction workshop in advance. The workshop evaluation encompassed observation protocols, participants’ feedback via chat after each workshop on their chance to speak and the usability of the digital tools, and telephone interviews on patients’ and health professionals’ experiences after the end of the workshop series.
Results: Observation protocols showed an active role of moderators in verbally encouraging every participant to get involved. Technical challenges occurred, but were in most cases immediately addressed and solved. Participants median rating of their chance to speak and the usability of the digital tool was “very good”. In the evaluation interviews participants reported a change of perspective and mutual understanding as a main benefit from the PPI workshops and described the atmosphere as inclusive and on equal footing. Benefits of the digital format such as overcoming geographical distance, saving time and combining workshop participation with professional or childcare obligations were reported. Technical support was stressed as a pre-condition for getting actively involved in digital PPI.
Conclusions: Digital formats using different didactic and documentation techniques, accompanied by technical support, can foster active patient and public involvement. The advantages of digital PPI formats such as geographical flexibility and saving time for participants as well as the opportunity to prepare and hold workshops in geographically stretched research teams persists beyond the pandemic and may in some cases outweigh the advantages of in-person communication.
Although, during the past decades, substantial advances emerged in identifying major local and systemic factors contributing to initiation and progression of osteoarthritis (OA), some neuroendocrine mechanisms are still not understood or even neglected when thinking about novel therapeutic options. One of which is the sympathetic nervous system that exhibits various OA-promoting effects in different tissues of the joint. Interestingly, the β2-adrenoceptor (AR) mediates the majority of these effects as demonstrated by several in vitro, in vivo as well as in clinical studies. This review article does not only summarize studies of the past two decades demonstrating that the β2-AR plays an OA-promoting role in different tissues of the joint but also aims to encourage the reader to think about next-level research to discover novel and innovative preventive and/or therapeutic strategies targeting the β2-AR in OA.
Das Hepatoblastom ist ein embryonaler Lebertumor, dessen Zellen unterschiedliche unreife Stadien aufweisen. Aufgrund dieser Unreife ist die Identifizierung von Krebsstammzellen erschwert, die in diesem Tumor vermutet und für Rückfälle verantwortlich gemacht werden. In Vorarbeiten konnte eine Krebsstammzellpopulation mit der Kombination der hämatopoetischen Stammzellmarker CD90 und CD34 sowie dem „oval cell“ OV-6-Antikörper in den etablierten Hepatoblastomzelllinien HuH6 und HepG2 detektiert werden. Diese CD34+OV-6+CD90+ Zellen wiesen eine erhöhte Expression von Pluripotenzfaktoren auf und zeichneten sich durch ein erhöhtes Migrationsverhalten aus.
In der hier vorgelegten Arbeit wurden zunächst Tumor-Sphäroid-Assays durchgeführt um diese Population als Krebsstammzellen zu bestätigen, da nur Krebsstammzellen unter den gegebenen Umständen wachsen können. Diese waren im Anschluss wieder in der Lage, in „normalem Medium“ zu differenzieren. Des Weiteren wurden die Zelllinien mit dem Standardtherapeutikum Cisplatin behandelt. Da Krebsstammzellen als chemoresistent gelten, konnte in der überlebenden Zellpopulation auch eine Anreicherung der CD34+OV-6+CD90+ Zellen beobachtet werden. Zusätzlich ließ sich eine weitere CD34+OV-6+CD90+ Population identifizieren, deren Expression aller drei Marker schwächer war und die bei steigenden Cisplatin-Konzentrationen den Großteil der CD34+OV-6+CD90+ Population ausmachte.
Neben den erhöhten Transkriptmengen der Pluripotenzmarker Oct4 und Nanog zeichneten sich die CD34+OV-6+CD90+ Krebsstammzellen durch eine verstärkte Expression der aktivierungsinduzierten Zytidin-Desaminase AID aus. AID wirkt induzierend auf die Transkription beider Pluripotenzmarker. Daher könnte es auch bei Krebsstammzellen eine Rolle bei der Induktion von Pluripotenz und bei ihrer langfristigen Erhaltung spielen. Dies unterstützend legten die verminderten Transkriptmengen der Pluripotenzgene nach einem AID siRNA Knock-Down eine Abhängigkeit des Stammzellcharakters von diesem Faktor nahe. Um einen Effekt von Therapeutika, die inhibitorisch auf AID wirken, auf Krebsstammzellen zu untersuchen, wurden die Zellen mit den DNMT-Inhibitoren Decitabine und Zebularine sowie dem HSP90-Inhibitor Tanespimycin behandelt. Tatsächlich konnte vor allem in den HuH6-Zellen ein verminderter Anteil der Krebsstammzellpopulation durch die drei Substanzen beobachtet werden. Wurden die Zellen im Anschluss mit dem Standardzytostatikum Cisplatin behandelt, führte allerdings eine Vorbehandlung mit Zebularine oder Decitabine zu einer starken Anreicherung von Krebsstammzellen. Dies war vor allem auf Zellen mit dem schwach positiven CD34+OV-6+CD90+ Expressionsprofil zurückzuführen, die chemo-induziert zu sein scheinen. Zwar erscheint die Mehrheit der Tumorzellen eliminiert zu werden, jedoch lassen diese Ergebnisse die Entstehung von chemo-induzierten Krebsstammzellen vermuten, die langfristig für einen Rückfall verantwortlich sein könnten. Daher ist von einer Ergänzung der Therapie mit diesen Substanzen abzusehen. Eine Vorbehandlung mit Tanespimycin hingegen konnte im Vergleich zur alleinigen Cisplatin-Behandlung wirksam den Anteil der Krebsstammzellen reduzieren. Interessanterweise war dies nicht auf einen verstärkten Zelltod der Krebsstammzellen, sondern vielmehr auf eine durch Tanespimycin bewirkte Differenzierung derselben zurückzuführen. Diese spiegelte sich auch in einer verminderten Expression von Pluripotenzmarkern auf mRNA-Ebene im Vergleich zur alleinigen Cisplatin-Behandlung wider.
Somit präsentierte sich Tanespimycin als potenter Inhibitor von Krebsstammzellen. Auch wenn weitere vorklinische und klinische Tests und Untersuchungen erfolgen müssen, stellt Tanespimycin bzw. die Substanzklasse der HSP90-Inhibitoren einen interessanten und vielversprechenden Kandidaten für eine Ergänzung der Standardtherapie vor allem bei behandlungsresistenten und rekurrenten High-Risk-Hepatoblastomen dar.
Inflammation is a regulated reaction of the body to control a threat such as infection or injury. An efficient resolution of inflammation is critical to prevent the development of chronic inflammation and to restore tissue homeostasis. Macrophages (Mf) play a crucial role in the onset, but also in the resolution of inflammation, because they phagocytose and eliminate pathogens and tissue debris. Efficient efferocytosis, i.e. the engulfment of apoptotic cells, represents an important trigger for the onset of the resolution response and contributes to the pro-resolving reprogramming of Mf. Despite the importance of post- transcriptional modes of regulation during the resolution phase and translational control as a key node modulating gene expression in immune cells, relevant translational alterations remain largely elusive.
In the present study, I aimed to identify translationally regulated targets in inflammatory primary murine Mf upon resolution-promoting efferocytosis. To this end, I used total RNA-sequencing as well as de novo proteomics analyses to determine global transcriptional and translational changes. Sequencing data confirmed that efferocytosis induced a pro-resolution signature in inflammatory Mf and pointed towards translational regulation because the related integrated stress response was enriched upon efferocytosis. While changes of gene expression between efferocytic and non-efferocytic Mf appeared rather small at the transcriptional level, I observed considerable differences at the level of de novo synthesized proteins. This finding suggests a regulation at the level of translation. Furthermore, the tight connection between translational and metabolic changes was confirmed by enriched metabolism-associated terms of targets upregulated by efferocytosis at both RNA and de novo protein level. Interestingly, analysis of translationally regulated targets in response to inflammatory stimulation showed reduced translation for most targets, with only little impact of efferocytosis. Among those targets, I identified pro-resolving matrix metallopeptidase 12 (Mmp12) as a novel candidate, which showed translational repression during early inflammation and translational increase during the resolution phase. Noteworthy, a first indicator for a potential translation regulatory component of Mmp12 were the extremely high mRNA levels and not overly high de novo protein levels. Validation experiments recapitulated a slight elevation of Mmp12 mRNA expression and a significant downregulation of MMP12 intracellular protein levels in inflammatory Mf, as observed in the RNA-seq and de novo proteomics datasets. To investigate whether the discrepancy in mRNA and protein expression were due to changes in translation, I applied polysomal fractionation analysis to determine the translational status of Mmp12. Inflammatory Mf displayed a significantly lower relative Mmp12 mRNA abundance in the late polysomes compared to naïve Mf, suggesting reduced translational efficiency upon inflammatory stimulation. Consequently, extracellular MMP12 levels in the supernatant of inflammatory Mf decreased, although with a slight delay.
The functional impact of attenuated Mmp12 translation upon inflammatory stimulation was assessed in migration assays. While siRNA-mediated knockdown of Mmp12 did not alter Mf migration on uncoated plates, it increased migration 3-fold on matrigel/elastin-coated plates. Importantly, the increase in migrated distance driven by siMmp12 could be lowered by the addition of exogenous recombinant MMP12 protein. In line with reduced Mmp12 translation and MMP12 protein in inflammatory Mf, I observed a significant increase in cell migration on matrigel/elastin-coated plates, while it remained unaltered on uncoated plates. Consequently, Mf elastase MMP12 degrades elastin, thereby cell migration along elastin fibers is diminished. In inflammatory Mf, Mmp12 is translationally downregulated, thereby enhancing the migratory capacity.
In summary, the present study identifies a substantial contribution of translational regulation in the course of inflammation shown by high changes between inflammatory naïve and efferocytic Mf at the de novo proteomic level. Specifically, I was able to determine the translational regulation of pro-resolving Mmp12, which is repressed during early inflammation and recovers during the resolution phase. Functionally, translational control of MMP12 emerged as a strategy to alter the migratory properties of Mf, enabling enhanced, matrix- dependent migration of Mf during the early inflammatory phase, while restricting migration during the resolution phase.
Aryl hydrocarbon receptor-dependent and -independent pathways mediate curcumin anti-aging effects
(2022)
The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor whose activity can be modulated by polyphenols, such as curcumin. AhR and curcumin have evolutionarily conserved effects on aging. Here, we investigated whether and how the AhR mediates the anti-aging effects of curcumin across species. Using a combination of in vivo, in vitro, and in silico analyses, we demonstrated that curcumin has AhR-dependent or -independent effects in a context-specific manner. We found that in Caenorhabditis elegans, AhR mediates curcumin-induced lifespan extension, most likely through a ligand-independent inhibitory mechanism related to its antioxidant activity. Curcumin also showed AhR-independent anti-aging activities, such as protection against aggregation-prone proteins and oxidative stress in C. elegans and promotion of the migratory capacity of human primary endothelial cells. These AhR-independent effects are largely mediated by the Nrf2/SKN-1 pathway.
The pathophysiology of Takotsubo Syndrome (TTS) is not completely understood and the trigger of sudden cardiac death (SCD) in TTS is not clear either. We therefore sought to find an association between TTS and primary electrical diseases. A total of 148 TTS patients were analyzed between 2003 and 2017 in a bi-centric manner. Additionally, a literature review was performed. The patients were included in an ongoing retrospective cohort database. The coexistence of TTS and primary electrical diseases was confirmed in five cases as the following: catecholaminergic polymorphic ventricular tachycardia (CPVT, 18-year-old female) (n = 1), LQTS 1 (72-year-old female and 65-year-old female) (n = 2), LQTS 2 (17-year-old female) (n = 1), and LQTS in the absence of mutations (22-year-old female). Four patients suffered from malignant tachyarrhythmia and recurrent syncope after TTS. Except for the CPVT patient and one LQTS 1 patient, all other cases underwent subcutaneous ICD implantation. An event recorder of the CPVT patient after starting beta-blocker did not detect arrhythmias. The diagnosis of primary electrical disease was in 80% of cases unmasked on a TTS event. This diagnosis triggered a family clinical and genetic screening confirming the diagnosis of primary electrical disease. A subsequent literature review identified five cases as the following: a congenital atrioventricular block (n = 1), a Jervell and Lange-Nielsen Syndrome (n = 1), and a family LQTS in the absence of a mutation (n = 2), LQTS 2 (n = 1). A primary electrical disease should be suspected in young and old TTS patients with a family history of sudden cardiac death. In suspected cases, e.g., ongoing QT interval prolongation, despite recovery of left ventricular ejection fraction a family screening is recommended.
Test-Retest-Reliabilität der Präpulsinhibition (PPI) und PPI-Korrelation mit dem Arbeitsgedächtnis
(2023)
Sensomotorisches Gating – ein Mechanismus zur Filterung des sensorischen Inputs und zur Regulierung des motorischen Outputs – wird experimentell durch die Präpulsinhibition (PPI) der akustisch ausgelösten Schreckreaktion (ASR) operatio-nalisiert. Frühere Studien deuten auf eine hohe Test-Retest-Reliabilität der PPI und eine mögliche Korrelation mit dem Arbeitsgedächtnis (engl. Working Memory (WM)) hin. Ziel dieser Studie war es, die Test-Retest-Reliabilität der PPI bei ge-sunden Menschen und ihre Korrelation mit der Leistung des WM zu überprüfen. Hier wurde ein akustisches Schreckreiz-PPI-Paradigma mit vier verschiedenen Präpuls-Intensitäten (64, 68, 72 und 76 dB(A)) und zwei verschiedene WM-Aufgaben (n-back, Change-Detection-Task (CDT)) verwendet. Es konnte eine ho-he Retest-Reliabilität der PPI mit einer mittleren Intraklassenkorrelation (engl. In-traclass Correlation (ICC)) von >.80 und eine signifikante positive Korrelation der PPI mit der n-back-, aber nicht mit der CDT-Leistung bestätigt werden. Eine detail-lierte Analyse zeigte, dass die PPI über alle Präpulsintensitäten hinweg sowohl mit den 2-back- als auch mit den 0-back-Bedingungen signifikant korrelierte, was auf eine Regulation durch konditionsübergreifende Prozesse (z. B. Aufmerksamkeit) schließen lässt. Wird jedoch die 0-back-Komponente aus den 2-back-Daten aus-partialisiert, sind spezifische und signifikante Korrelationen mit der Arbeitsgedächt-nisleistung für die 76 dB(A) PPI-Bedingung zu finden. Mit der vorliegenden Studie konnte die hohe Test-Retest-Reliabilität der PPI beim Menschen bestätigt und die Korrelation mit der Arbeitsgedächtnisleistung validiert und erweitert werden.
Whereas the lack of biomarkers in penile cancer (PeCa) impedes the development of efficacious treatment protocols, preliminary evidence suggests that c-MET and associated signaling elements may be dysregulated in this disorder. In the following study, we investigated whether c-MET and associated key molecular elements may have prognostic and therapeutic utility in PeCa. Formalin-fixed, paraffin-embedded tumor tissue from therapy-naïve patients with invasive PeCa was used for tissue microarray (TMA) analysis. Immunohistochemical staining was performed to determine the expression of the proteins c-MET, PPARg, β-catenin, snail, survivin, and n-MYC. In total, 94 PeCa patients with available tumor tissue were included. The median age was 64.9 years. High-grade tumors were present in 23.4%, and high-risk HPV was detected in 25.5%. The median follow-up was 32.5 months. High expression of snail was associated with HPV-positive tumors. Expression of β-catenin was inversely associated with grading. In both univariate COX regression analysis and the log-rank test, an increased expression of PPARg and c-MET was predictive of inferior disease-specific survival (DSS). Moreover, in multivariate analysis, a higher expression of c-MET was independently associated with worse DSS. Blocking c-MET with cabozantinib and tivantinib induced a significant decrease in viability in the primary PeCa cell line UKF-PeC3 isolated from the tumor tissue as well as in cisplatin- and osimertinib-resistant sublines. Strikingly, a higher sensitivity to tivantinib could be detected in the latter, pointing to the promising option of utilizing this agent in the second-line treatment setting.