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Considering the microbiome in stress-related and neurodevelopmental trajectories to schizophrenia
(2020)
Early life adversity and prenatal stress are consistently associated with an increased risk for schizophrenia, although the exact pathogenic mechanisms linking the exposures with the disease remain elusive. Our previous view of the HPA stress axis as an elegant but simple negative feedback loop, orchestrating adaptation to stressors among the hypothalamus, pituitary, and adrenal glands, needs to be updated. Research in the last two decades shows that important bidirectional signaling between the HPA axis and intestinal mucosa modulates brain function and neurochemistry, including effects on glucocorticoid hormones and brain-derived neurotrophic factor (BDNF). The intestinal microbiome in earliest life, which is seeded by the vaginal microbiome during delivery, programs the development of the HPA axis in a critical developmental window, determining stress sensitivity and HPA function as well as immune system development. The crosstalk between the HPA and the Microbiome Gut Brain Axis (MGBA) is particularly high in the hippocampus, the most consistently disrupted neural region in persons with schizophrenia. Animal models suggest that the MGBA remains influential on behavior and physiology across developmental stages, including the perinatal window, early childhood, adolescence, and young adulthood. Understanding the role of the microbiome on critical risk related stressors may enhance or transform of understanding of the origins of schizophrenia and offer new approaches to increase resilience against stress effects for preventing and treating schizophrenia.
Downy mildew of common sage (Salvia officinalis), caused by Peronospora salviae-officinalis, has become a serious problem in sage production worldwide. The causal agent of the disease belongs to the Pe. belbahrii species complex and was described as a species of its own in 2009. Nevertheless, very little is known about its infection biology and epidemiology. The aims of the current study were therefore to unravel the life cycle of this downy mildew and gain deeper insights into the epidemiology of the disease, as well as to clarify the species boundaries in the Pe. belbahrii species complex.
Infection studies showed that temperatures between 15 and 20 °C were most favourable for infection and disease progress. At 5 °C Pe. salviae-officinalis is still able to infect sage plants, but sporulation was only observed at higher temperatures. Furthermore, Pe. salviae-officinalis needs two events of leaf wetness or high humidity, a first one of at least three hours for conidial germination and penetration of the host, and a second one for sporulation. Additionally, contamination of sage seeds by Pe. salviae-officinalis was proven by seed washing and by PCR and DNA sequence comparisons, suggesting that infested seeds might play a major role in the fast spread of sage downy mildew, which is an important finding for phytosanitary or quarantine measures.
A protocol for fluorescence staining and confocal laser scanning microscopy was established and the whole life cycle of Pe. salviae-officinalis was tracked including oospore formation. The method was also used to examine samples of Pe. lamii on Lamium purpureum and Pe. belbahrii on Ocimum basilicum demonstrating the usefulness of this method for studying the infection process of downy mildews in general.
Peronospora species parasitizing S. sclarea, S. pratensis, O. basilicum, and Plectranthus scutellarioides were studied using light microscopy and molecular phylogenetic analyses based on six loci (ITS rDNA, cox1, cox2, ef1a, hsp90 and β-tubulin). The downy mildew on S. pratensis was shown to be distinct from Pe. salviae-officinalis and closely related to Pe. glechomae, and is herein described as a new taxon, Peronospora salviae-pratensis. The downy mildew on S. sclarea was found to be caused by Peronospora salviae-officinalis. The multi-gene phylogeny revealed that the causal agent of downy mildew on coleus is distinct from Pe. belbahrii on basil, and is herein described as a new taxon, Pe. choii.
Einleitung- 12,5% aller operierten Patienten sind für mehr als 80% aller Todesfälle verantwortlich. Über die Identifizierung dieser Risikopatienten ist wenig bekannt.6. Währenddessen sind hepatobiliäre Operationen nach wie vor mit einem relativ hohen Mortalitätsrisiko von etwa 5% assoziiert.15.
Ziel- Die Evaluierung der „Cumulative Illness Rating Scale(CIRS)“ zur Prädiktion von Komplikationen und Mortalität in der hepatobiliären Chirurgie.
Material und Methoden- Alle Patienten, die sich vom 01.01.2011 bis zum 06.05.2016 einer hepatobiliären unterzogen, wurden retrospektiv anhand der elektronischen Patientenakte(NICE) gemäß der modifizierten CIRS46 bewertet. Abhängig von der Gesamtsumme der ermittelten CIRS-Werte wurden die Patienten in 4 Risikoklassen (1-4) unterteilt. Anschließend wurden die 14 CIRS-Kategorien und die Risikoklassen auf ein vermehrtes Auftreten von Komplikationen ≥IIIb50 gemäß der Dindo-Klassifikation sowie der 90-Tages-Mortalität49 untersucht.
Ergebnisse- 576 Patienten mit einem durchschnittlichen Alter von 60,7 ± 13,7 Jahren wurden in die Studie aufgenommen. 18,6% der Patienten wiesen Komplikationen ≥IIIb anhand der Dindo-Klassifikation auf. 6,8% verstarben innerhalb des Überwachungszeitraumes von 90 Tagen. Für die Risikoklassen 3+4 (OR=1,674; p=0,027; 95%CI=1,060-2,645) sowie für Erkrankungen der Schweregrade 3+4 in der Kategorie „Leber“ (OR=2,583; p=0,015; 95%CI=1,205-5,538) konnten signifikant erhöhte Wahrscheinlichkeiten für die Entstehung von Komplikationen festgestellt werden. Gleiches wurde im Bezug auf Mortalität für Erkrankungen der Schweregrade 3+4 in den Kategorien „Hypertonie“ (OR=2,249; p=0,019; 95%CI=1,141-4,434) und „Leber“ (OR=8,891; p=0,033; 95%CI=1,189-66,492) nachgewiesen. Im Gegensatz dazu führten Erkrankungen der Schweregrade 3+4 in der Kategorie „Unterer Gastrointestinaltrakt“ zu einer deutlichen Reduzierung des Risikos für die Entwicklung von Komplikationen (OR=0,385; p<0,000; 95%CI=0,228-0,649) und Mortalität (OR=0,419; p=0,047; 95%CI=0,178-0987). Die im Rahmen der binär logistischen Regression erstellten Regressionsgleichungen ermöglichten keine verbesserte Klassifizierung der Patienten.
Zusammenfassung- Die Ergebnisse zeigen, dass signifikante Zusammenhänge zwischen der Entstehung von Komplikationen ≥IIIb anhand der Dindo-Klassifikation und der 90-Tages-Mortalität mittels CIRS nachweisbar sind. Dennoch geht hervor, dass der prädiktive Wert der modifizierten CIRS für die hepatobiliäre Chirurgie gering ist.
Ein wichtiges Teilgebiet der Organokatalyse stellt die Wasserstoffbrücken-vermittelte Katalyse dar. Als erfolgreiche katalytische Einheiten haben sich dabei diejenigen Systeme ausgezeichnet, die in der Lage sind mindestens zwei Wasserstoffbrücken zeitgleich auszubilden. Zu den bekanntesten Vertretern zählen hierbei sicher (Thio-) Harnstoffe sowie Guanidinium- und Amidinium-Ionen.
Im Rahmen der vorliegenden Doktorarbeit wurden drei Katalysatortypen mit Amidin- und Guanidingrundgerüst synthetisiert. Zum Einen wurde ein neues axial-chirale Amidin mit zusätzlicher Thioharnstoff-Funktion synthetisiert. Hierfür wurden drei aromatische Fragmente mittels zweier Suzuki-Kupplungen verknüpft und im Nachhinein mit einem chiralen Aminoalkohol über eine Williamson-Ethersynthese kondensiert. Die basenvermittelte, diastereoselektive Makrocyclisierung lieferte das axial chirale Amidin und stellte den Schlüsselschritt der Synthese dar. Schließich konnte durch Addition des erhaltenen Anilin-Derivats an ein Aryl-Isothiocyanat die Thioharnstoff-Funktionalität eingeführt werden.
Zum Anderen wurde eine Reihe an C2-symmetrischer Bisamidine hergestellt. Sie wurden in einer N-Acetylcystein-katalysierten Reaktion zwischen Phthalonitril und den entsprechenden chiralen, vicinalen Diaminen hergestellt. Die erhaltenen Ausbeuten der Bisamidine wurden unmittelbar durch den sterischen Anspruch der Substituenten des jeweils eingesetzten Diamins bestimmt. Auf der einen Seite konnten bei Verwendung 1- und 2-Naphthyl-substituierter Diamine nur mäßige Ausbeuten erzielt werden. Auf der anderen Seite konnte man durch den Einsatz kleinerer Reste wie Phenyl nahezu quantitative Ausbeuten erzielen. Die Herstellung chiraler, vicinaler Diamine wurde über eine Diaza-Cope-Umlagerung realisiert.
Schließlich wurde ein C2-symmetrisches bicyclisches Guanidin hergestellt. Die Synthese begann mit einer Knoevenagel-artigen Kondensationsreaktion und anschließender Veresterung der erhaltenen Carbonsäure. Kinetische Racematspaltung des racemischen Esters unter Verwendung einer Lipase lieferte enantiomerenreines (S)-β-Phenylalanin, welches als Ausgangverbindung der überwiegend linearen Synthese diente. Das im Zuge der Synthese hergestellte chirale Triamin wurde schließlich mithilfe von Dimethyltrithiocarbonat zum Guanidin cyclisiert.
Alle drei Katalysatortypen wurden für die enantioselektive Steuerung diverser Reaktionen eingesetzt, u. A. der Diels-Alder-, Morita-Baylis-Hillman-, Friedel-Crafts-Reaktion und dem Schlüsselschritt der Quinkert-Dane-Estron-Synthese. Bei Letzterem handelt es sich um eine Diels-Alder-Reaktion, um den C-Ring eines Steroidgerüsts aufzubauen, welches durch wenige chemische Transformationen in das bedeutende weibliche Sexualhormon Estron überführt werden kann.
Interest in time-resolved connectivity in fMRI has grown rapidly in recent years. The most widely used technique for studying connectivity changes over time utilizes a sliding windows approach. There has been some debate about the utility of shorter versus longer windows, the use of fixed versus adaptive windows, as well as whether observed resting state dynamics during wakefulness may be predominantly due to changes in sleep state and subject head motion. In this work we use an independent component analysis (ICA)-based pipeline applied to concurrent EEG/fMRI data collected during wakefulness and various sleep stages and show: 1) connectivity states obtained from clustering sliding windowed correlations of resting state functional network time courses well classify the sleep states obtained from EEG data, 2) using shorter sliding windows instead of longer non-overlapping windows improves the ability to capture transition dynamics even at windows as short as 30 s, 3) motion appears to be mostly associated with one of the states rather than spread across all of them 4) a fixed tapered sliding window approach outperforms an adaptive dynamic conditional correlation approach, and 5) consistent with prior EEG/fMRI work, we identify evidence of multiple states within the wakeful condition which are able to be classified with high accuracy. Classification of wakeful only states suggest the presence of time-varying changes in connectivity in fMRI data beyond sleep state or motion. Results also inform about advantageous technical choices, and the identification of different clusters within wakefulness that are separable suggest further studies in this direction.
Most living organisms possess varying degrees of regenerative capabilities but how these regenerative processes are controlled is still poorly understood. Naturally occurring bioelectric voltages (like Vmem) are thought to be playing instructive role in tissue regeneration, as well as embryonic development. The different distribution of ions on the either side of the cell membrane results in intra- and extra-cellular voltage differences, known as membrane potential or Vmem. The relationship between Vmem and cell physiology is conserved in a wide range of cell types and suggests that Vmem regulation is a fundamental control mechanism for regeneration related processes e.g., proliferation and differentiation. In the present study we measured Vmem in three different cell types (human osteogenic sarcoma cell line (OSC), rat bone marrow derived mesenchymal stem cells (BM-MSC), and rat dermal fibroblasts) and characterized the relationship between their Vmem and proliferation. In order to find out if Vmem controls proliferation, or visa-versa, we blocked and then unblocked Na+/K+-exchanging ATPase using ouabain and measured the proliferation. Our results demonstrate that Vmem can be pharmacologically manipulated to control proliferation in certain cell types like BM-MSC. Taken together, it is clear that control of bioelectrical properties in non-excitable cells could prove to be potentially a useful tool in regenerative medicine efforts.
Spatial and temporal processes shaping microbial communities are inseparably linked but rarely studied together. By Illumina 16S rRNA sequencing, we monitored soil bacteria in 360 stations on a 100 square meter plot distributed across six intra-annual samplings in a rarely managed, temperate grassland. Using a multi-tiered approach, we tested the extent to which stochastic or deterministic processes influenced the composition of local communities. A combination of phylogenetic turnover analysis and null modeling demonstrated that either homogenization by unlimited stochastic dispersal or scenarios, in which neither stochastic processes nor deterministic forces dominated, explained local assembly processes. Thus, the majority of all sampled communities (82%) was rather homogeneous with no significant changes in abundance-weighted composition. However, we detected strong and uniform taxonomic shifts within just nine samples in early summer. Thus, community snapshots sampled from single points in time or space do not necessarily reflect a representative community state. The potential for change despite the overall homogeneity was further demonstrated when the focus shifted to the rare biosphere. Rare OTU turnover, rather than nestedness, characterized abundance-independent β-diversity. Accordingly, boosted generalized additive models encompassing spatial, temporal and environmental variables revealed strong and highly diverse effects of space on OTU abundance, even within the same genus. This pure spatial effect increased with decreasing OTU abundance and frequency, whereas soil moisture – the most important environmental variable – had an opposite effect by impacting abundant OTUs more than the rare ones. These results indicate that – despite considerable oscillation in space and time – the abundant and resident OTUs provide a community backbone that supports much higher β-diversity of a dynamic rare biosphere. Our findings reveal complex interactions among space, time, and environmental filters within bacterial communities in a long-established temperate grassland.
Perspectives on participation in continuous vocational education training - an interview study
(2020)
In European industrialized countries, a large number of companies in the healthcare, hotel, and catering sectors, as well as in the technology sector, are affected by demographic, political, and technological developments resulting in a greater need of skilled workers with a simultaneous shortage of skilled workers (CEDEFOP, 2015, 2016). Consequently, employers have to address workers who have not been taken into account such as low-skilled workers, workers returning from a career break, people with a migrant background, older people, and jobseekers and train them, in order to guarantee the professionalization of this workforce (Festing and Harsch, 2018). Continuing vocational education and training (CVET) is seen as an indispensable tool; because CVET has advantages for both employers and employees, it helps to increase the productivity of companies (Barrett and O’Connell, 2001), to prevent the widening of socioeconomic disparities (Dieckhoff, 2007), and to open up career opportunities for the workforce (Rubenson and Desjardins, 2009). However, participation rate on CVET seems to differ, depending on institutional factors (such as sector and size of the company) and individual characteristics (such as qualification level, migration background, age and time of absence from work) (e.g., Rubenson and Desjardins, 2009; Wiseman and Parry, 2017). In contrast to previous research, our study aims to provide a holistic view of reasons for and against CVET, combining the different perspectives of employers and (potential) employees. The analysis of reasons and barriers was carried out based on semi-structured interviews. Fifty-seven employers, 73 employees, and 42 jobseekers (potential employees) from the sectors retail, healthcare and social services, hotels and catering, and technology were interviewed. Results point to considerable differences in the reasons and barriers mentioned by the disadvantaged groups. These differences are particularly significant between employees on the one side and employers, as well as jobseekers, on the other side, while the reasons to attend CVET of jobseekers are more similar to those of employers. The results can be used to tailor CVET more closely to the needs of (potential) employees and thus strengthen both the qualification and career opportunities of (potential) employees and the competitiveness and productivity of companies.
Diversity and psychological health issues at the workplace are pressing issues in today’s organizations. However, research linking two fields is scant. To bridge this gap, drawing from team faultline research, social categorization theory, and the job-demands resources model, we propose that perceiving one’s team as fragmented into subgroups increases strain. We further argue that this relationship is mediated by task conflict and relationship conflict and that it is moderated by psychological empowerment and task interdependence. Multilevel structural equation models on a two-wave sample consisting of 536 participants from 107 work teams across various industries and work contexts partially supported the hypotheses: task conflict did indeed mediate the positive relationships between perceived subgroups and emotional exhaustion while relationship conflict did not; effects on stress symptoms were absent. Moreover, contrary to our expectations, neither empowerment, nor task interdependence moderated the mediation. Results indicate that team diversity can constitute a job demand that can affect psychological health. Focusing on the mediating role of task conflict, we offer a preliminary process model to guide future research at the crossroads of diversity and psychological health at work.
Mobilität ist eine wesentliche Voraussetzung für soziale Teilhabe. Jedoch ist Mobilität mit Kosten verbunden, sodass die soziale Teilhabe bei geringen finanziellen Mitteln gefährdet sein kann. Das Projekt Social2Mobility begegnet dieser Problematik, indem es das Ziel verfolgt, die soziale Teilhabe von Menschen, die von finanzieller Armut betroffen oder bedroht sind, durch Stärkung ihrer Mobilität zu steigern. Um dieses Ziel zu erreichen, soll im Rahmen des Projektes in der Region Hannover ein Reallabor eingerichtet werden. Das Arbeitspapier begleitet dessen Konzeption und geht der Frage nach, inwiefern in der Region Hannover ein Reallabor zum Thema mobilitätsbezogene soziale Exklusion eingerichtet werden kann. So werden in diesem Arbeitspapier die konzeptionellen Überlegungen zur räumlichen Verortung, zur Zielgruppenauswahl und zu möglichen Themen für das Reallabor dargestellt. Zudem werden die Spezifizierung auf die Zielgruppen Haushalte mit Kindern und ältere Menschen (ab 60 Jahren) sowie die Auswahl der Kommune Ronnenberg als Verortung für das Reallabor begründet.
When Christine Lagarde announced her first, moderate rescue package, she called upon member states to provide fiscal aid. But the markets showed to have lost confidence in fiscal policy. In the absence of strong monetary policy signals, the slide continued until Lagarde in her second attempt opened the floodgates.
Christine Lagarde verband die Ankündigung ihres ersten, moderaten Rettungspakets mit der Aufforderung an die Mitgliedstaaten, fiskalische Hilfen bereitzustellen. Die Märkte scheinen sich das Vertrauen in die Fiskalpolitik indessen abgewöhnt zu haben. Da starke geldpolitische Signale zunächst ausblieben, ging die Talfahrt weiter, bis Lagarde im zweiten Versuch in die Fußstapfen ihres Vorgängers trat und die Schleusen öffnete.
Governments, economists and intellectuals have called for common European bonds or increased own EU funds to address the recession induced by Covid19. Unfortunately, the German government, joined by the other members of the “Frugal Four” (Austria, Finland, the Netherlands), has categorically rejected to look into any such measures and favours using the ESM. This reaction created a déjà vu experience for citizens and governments of the heavily affected southern Member States of the EU. The proposal to use the ESM raises fears of another wave of austerity amounting to yet another lost decade for economic, social, and ecological development in Europe.
Warum das Stichwort Corona Bonds so viele falsche Assoziationen weckt, und wie sie beschaffen sein müssten, damit auch Deutschland damit gut klarkommt: Vor der morgigen Sitzung der Eurogruppe spricht Max Steinbeis mit MATTHIAS GOLDMANN über seinen Vorschlag und die damit verknüpften Chancen und Risiken.
The recovery plan of the Commission entitled "Next Generation EU" proposes a compromise that goes beyond the ominous lowest common denominator. With a package of EUR 750bn in total, comprising EUR 250bn in loans and the rest in grants, the Commission paves the way for both forward-looking public finance and constitutional innovation. The proposals are masterpieces of high-tech legal engineering. Again, European constitutional law evolves through crisis. Yet, again, it stands to reason how far the proposed instruments will shift the European Union towards enhancing solidarity and democracy.
The nucleoside analogue nelarabine, the prodrug of arabinosylguanine (AraG), is effective against T-cell acute lymphoblastic leukaemia (T-ALL) but not against B-cell ALL (B-ALL). The underlying mechanisms have remained elusive. Here, data from pharmacogenomics studies and a panel of ALL cell lines reveal an inverse correlation between nelarabine sensitivity and the expression of SAMHD1, which can hydrolyse and inactivate triphosphorylated nucleoside analogues. Lower SAMHD1 abundance is detected in T-ALL than in B-ALL in cell lines and patient-derived leukaemic blasts. Mechanistically, T-ALL cells display increased SAMHD1 promoter methylation without increased global DNA methylation. SAMHD1 depletion sensitises B-ALL cells to AraG, while ectopic SAMHD1 expression in SAMHD1-null T-ALL cells induces AraG resistance. SAMHD1 has a larger impact on nelarabine/AraG than on cytarabine in ALL cells. Opposite effects are observed in acute myeloid leukaemia cells, indicating entity-specific differences. In conclusion, SAMHD1 promoter methylation and, in turn, SAMHD1 expression levels determine ALL cell response to nelarabine.
Markeninszenierung in Japan - zur narrativen Konstruktion der Lifestyle-Marken "Muji" und "Uniqlo"
(2020)
Die Einzelhandelsketten "Muji" und "Uniqlo" gelten als Musterbeispiele für international erfolgreiche Lifestyle-Marken aus Japan. Aus einer interdisziplinären Perspektive heraus identifiziert Christiane Rühle die Strukturen und Akteure dieser spezifischen Markeninszenierungen und arbeitet die dazugehörigen Positionen, Mittel und zentralen Motive heraus. Sie fragt im Kontext von unternehmensbezogener und nationalstaatlicher Imagebildung nach den Bezügen zwischen Konsum, Kultur und Identität und fokussiert dabei auf die Rolle, die privatwirtschaftliche Unternehmen innerhalb dieses Prozesses einnehmen.
In the context of workplace health promotion, physical activity programs have been shown to reduce musculoskeletal diseases and stress, and to improve the quality of life. The aim of this study was to examine the effects of using the “five-Business” stretch training device for office workers on their quality of life. A total of 313 office workers (173m/137f) participated voluntarily in this intervention–control study with an average age of 43.37 ± 11.24 (SD) years, 175.37 ± 9.35 cm in height and 75.76 ± 15.23 kg in weight, with an average BMI of 24.5 ± 3.81 kg/m2. The participants completed the stretch training twice a week for approximately 10 minutes for a duration of 12 weeks. The SF-36 questionnaire was used to evaluate the effectiveness of the intervention at baseline and after 12 weeks. Significantly improved outcomes in mental sum score (p = 0.008), physical functioning (p < 0.001), bodily pain (p = 0.01), vitality (p = 0.025), role limitations due to physical problems (p = 0.018) and mental health (p = 0.012) were shown after the stretching training. The results suggest that a 12-week stretching program for office desk workers is suitable to improve significantly their health-related quality of life.
Using a nonlinear Bayesian likelihood approach that fully accounts for the zero lower bound on nominal interest rates, the authors analyze US post-crisis business cycle dynamics and provide reference parameter estimates. They find that neither the inclusion of financial frictions nor that of household heterogeneity improve the empirical fit of the standard model, or its ability to provide a joint explanation for the post-2007 dynamics. Associated financial shocks mis-predict an increase in consumption. The common practice of omitting the ZLB period in the estimation severely distorts the analysis of the more recent economic dynamics.
Do current levels of bank capital in Europe suffice to support a swift recovery from the COVID-19 crisis? Recent research shows that a well-capitalized banking sector is a major factor driving the speed and breadth of recoveries from economic downturns. In particular, loan supply is negatively affected by low levels of capital. We estimate a capital shortfall in European banks of up to 600 billion euro in a severe scenario, and around 143 billion euro in a moderate scenario. We propose a precautionary recapitalization on the European level that puts the European Stability Mechanism (ESM) center stage. This proposal would cut through the sovereign-bank nexus, safeguard financial stability, and position the Eurozone for a quick recovery from the pandemic.