@article{ČuklinaHahnImakaevetal.2016, author = {Čuklina, Jelena and Hahn, Julia and Imakaev, Maxim and Omasits, Ulrich and F{\"o}rstner, Konrad U. and Ljubimov, Nikolay and Goebel, Melanie and Pessi, Gabriella and Fischer, Hans-Martin and Ahrens, Christian H. and Gelfand, Mikhail S. and Evguenieva-Hackenberg, Elena}, title = {Genome-wide transcription start site mapping of Bradyrhizobium japonicum grown free-living or in symbiosis - a rich resource to identify new transcripts, proteins and to study gene regulation}, series = {BMC Genomics}, volume = {17}, journal = {BMC Genomics}, doi = {10.1186/s12864-016-2602-9}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-164565}, pages = {302}, year = {2016}, abstract = {Background Differential RNA-sequencing (dRNA-seq) is indispensable for determination of primary transcriptomes. However, using dRNA-seq data to map transcriptional start sites (TSSs) and promoters genome-wide is a bioinformatics challenge. We performed dRNA-seq of Bradyrhizobium japonicum USDA 110, the nitrogen-fixing symbiont of soybean, and developed algorithms to map TSSs and promoters. Results A specialized machine learning procedure for TSS recognition allowed us to map 15,923 TSSs: 14,360 in free-living bacteria, 4329 in symbiosis with soybean and 2766 in both conditions. Further, we provide proteomic evidence for 4090 proteins, among them 107 proteins corresponding to new genes and 178 proteins with N-termini different from the existing annotation (72 and 109 of them with TSS support, respectively). Guided by proteomics evidence, previously identified TSSs and TSSs experimentally validated here, we assign a score threshold to flag 14 \% of the mapped TSSs as a class of lower confidence. However, this class of lower confidence contains valid TSSs of low-abundant transcripts. Moreover, we developed a de novo algorithm to identify promoter motifs upstream of mapped TSSs, which is publicly available, and found motifs mainly used in symbiosis (similar to RpoN-dependent promoters) or under both conditions (similar to RpoD-dependent promoters). Mapped TSSs and putative promoters, proteomic evidence and updated gene annotation were combined into an annotation file. Conclusions The genome-wide TSS and promoter maps along with the extended genome annotation of B. japonicum represent a valuable resource for future systems biology studies and for detailed analyses of individual non-coding transcripts and ORFs. Our data will also provide new insights into bacterial gene regulation during the agriculturally important symbiosis between rhizobia and legumes.}, language = {en} } @article{UeceylerSchaeferMackenrodtetal.2016, author = {{\"U}{\c{c}}eyler, Nurcan and Sch{\"a}fer, Kristina A. and Mackenrodt, Daniel and Sommer, Claudia and M{\"u}llges, Wolfgang}, title = {High-Resolution Ultrasonography of the Superficial Peroneal Motor and Sural Sensory Nerves May Be a Non-invasive Approach to the Diagnosis of Vasculitic Neuropathy}, series = {Frontiers in Neurology}, volume = {7}, journal = {Frontiers in Neurology}, number = {48}, doi = {10.3389/fneur.2016.00048}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-146671}, year = {2016}, abstract = {High-resolution ultrasonography (HRUS) is an emerging new tool in the investigation of peripheral nerves. We set out to assess the utility of HRUS performed at lower extremity nerves in peripheral neuropathies. Nerves of 26 patients with polyneuropathies of different etiologies and 26 controls were investigated using HRUS. Patients underwent clinical, laboratory, electrophysiological assessment, and a diagnostic sural nerve biopsy as part of the routine work-up. HRUS was performed at the sural, tibial, and the common, superficial, and deep peroneal nerves. The superficial peroneal nerve longitudinal diameter (LD) distinguished best between the groups: patients with immune-mediated neuropathies (n = 13, including six with histology-proven vasculitic neuropathy) had larger LD compared to patients with non-immune-mediated neuropathies (p < 0.05) and to controls (p < 0.001). Among all subgroups, patients with vasculitic neuropathy showed the largest superficial peroneal nerve LD (p < 0.001) and had a larger sural nerve cross-sectional area when compared with disease controls (p < 0.001). Enlargement of the superficial peroneal and sural nerves as detected by HRUS may be a useful additional finding in the differential diagnosis of vasculitic and other immune-mediated neuropathies.}, language = {en} } @article{UeceylerSchroeterKafkeetal.2016, author = {{\"U}{\c{c}}eyler, Nurcan and Schr{\"o}ter, Nils and Kafke, Waldemar and Kramer, Daniela and Wanner, Christoph and Weidemann, Frank and Sommer, Claudia}, title = {Skin Globotriaosylceramide 3 Load Is Increased in Men with Advanced Fabry Disease}, series = {PLoS ONE}, volume = {11}, journal = {PLoS ONE}, number = {11}, doi = {10.1371/journal.pone.0166484}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-178856}, year = {2016}, abstract = {Background The X-chromosomally linked life-limiting Fabry disease (FD) is associated with deposits of the sphingolipid globotriaosylceramide 3 (Gb3) in various tissues. Skin is easily accessible and may be used as an additional diagnostic and follow-up medium. Our aims were to visualize skin Gb3 deposits in FD patients applying immunofluorescence and to determine if cutaneous Gb3 load correlates with disease severity. Methods At our Fabry Center for Interdisciplinary Therapy we enrolled 84 patients with FD and 27 healthy controls. All subjects underwent 5-mm skin punch biopsy at the lateral lower leg and the back. Skin samples were processed for immunohistochemistry using antibodies against CD77 (i.e. Gb3). Cutaneous Gb3 deposition was quantified in a blinded manner and correlated to clinical data. Results We found that Gb3 load was higher in distal skin of male FD patients compared to healthy controls (p<0.05). Men (p<0.01) and women (p<0.05) with a classic FD phenotype had higher distal skin Gb3 load than healthy controls. Men with advanced disease as reflected by impaired renal function, and men and women with small fiber neuropathy had more Gb3 deposits in distal skin samples than males with normal renal function (p<0.05) and without small fiber neuropathy. Gb3 deposits were not different between patients with and without enzyme replacement therapy. Conclusions Immunofluorescence on minimally invasive skin punch biopsies may be useful as a tool for assessment and follow-up in FD patients.}, language = {en} } @article{UeceylerBikoHoseetal.2016, author = {{\"U}{\c{c}}eyler, Nurcan and Biko, Lydia and Hose, Dorothea and Hoffmann, Lukas and Sommer, Claudia}, title = {Comprehensive and differential long-term characterization of the alpha-galactosidase A deficient mouse model of Fabry disease focusing on the sensory system and pain development}, series = {Molecular Pain}, volume = {12}, journal = {Molecular Pain}, number = {1744806916646370}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-147562}, year = {2016}, abstract = {Fabry disease is an X-linked lysosomal storage disorder due to impaired activity of alpha-galactosidase A with intracellular accumulation of globotriaosylceramide. Associated small fiber pathology leads to characteristic pain in Fabry disease. We systematically assessed sensory system, physical activity, metabolic parameters, and morphology of male and female mice with alpha-galactosidase A deficiency (Fabry ko) from 2 to 27 months of age and compared results with those of age- and gender-matched wild-type littermates of C57Bl/6J background. Results From the age of two months, male and female Fabry mice showed mechanical hypersensitivity (p < 0.001 each) compared to wild-type littermates. Young Fabry ko mice of both genders were hypersensitive to heat stimulation (p < 0.01) and developed heat hyposensitivity with aging (p < 0.05), while cold hyposensitivity was present constantly in young (p < 0.01) and old (p < 0.05) Fabry ko mice compared to wild-type littermates. Stride angle increased only in male Fabry ko mice with aging (p < 0.01) in comparison to wild-type littermates. Except for young female mice, male (p < 0.05) and female (p < 0.01) Fabry ko mice had a higher body weight than wild-type littermates. Old male Fabry ko mice were physically less active than their wild-type littermates (p < 0.05), had lower chow intake (p < 0.001), and lost more weight (p < 0.001) in a one-week treadmill experiment than wild-type littermates. Also, Fabry ko mice showed spontaneous pain protective behavior and developed orofacial dysmorphism resembling patients with Fabry disease. Conclusions. Mice with alpha-galactosidase A deficiency show age-dependent and distinct deficits of the sensory system. alpha-galactosidase A-deficient mice seem to model human Fabry disease and may be helpful when studying the pathophysiology of Fabry-associated pain.}, language = {en} } @phdthesis{Oenel2016, author = {{\"O}nel, Ayla}, title = {Synthese und Relevanz von Oxylipinen in Bl{\"a}ttern, Wurzeln und Samen von \(Arabidopsis\) \(thaliana\)}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-141647}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2016}, abstract = {Die Lipidoxidation kann sowohl enzymatisch als auch nicht enzymatisch erfolgen. Der erste Schritt der enzymatischen Oxidation wird durch Lipoxygenasen katalysiert, von welchen es in Arabidopsis thaliana sechs verschiedene Isoformen gibt. Dabei werden die Lipoxygenasen nach dem Kohlenstoffatom klassifiziert, welches sie oxidieren. Somit geh{\"o}ren die LOX1 und LOX5 zu den 9-Lipoxygenasen, w{\"a}hrend LOX2, LOX3, LOX4 und LOX6 zu den 13 Lipoxygenasen z{\"a}hlen. W{\"a}hrend der Samenalterung findet vermehrt eine Lipidperoxidation statt, welche mit einem Verfall des Samens sowie einer verringerten Keimrate korreliert. Im Rahmen dieser Arbeit wurde zun{\"a}chst erfolgreich ein System zur k{\"u}nstlichen Samenalterung von Arabidopsis thaliana etabliert. Bei der k{\"u}nstlichen Alterung stiegen {\"a}hnlich wie bei der nat{\"u}rlichen Samenalterung oxidierte Lipide an und die Keimrate fiel ab. Nach Alterung konnte ein Anstieg von sechs verschiedenen oxidierten Triacylglycerolen detektiert werden. Es konnte in dieser Arbeit mit Hilfe von Mutanten mit Defekten in mehreren der Lipoxygenase Gene gezeigt werden, dass die Oxidation dieser veresterten Fetts{\"a}uren zum gr{\"o}ßten Teil nicht enzymatisch erfolgt. Bei der Alterung stiegen zudem enzymatisch gebildete 9 Lipoxygenase Produkte wie freie Hydroxy- und Ketofetts{\"a}uren an. Bei einer Analyse der freien oxidierten Fetts{\"a}uren konnte ebenfalls mit Lipoxygenase Mutanten ermittelt werden, dass diese haupts{\"a}chlich via LOX1 oxidiert werden. Die Untersuchung der Keimraten der Lipoxygenase Mutanten nach Alterung zeigte in mehreren Versuchen eine leicht erh{\"o}hte Keimrate der lox1 im Vergleich zum Wildtyp. Eine exogene Behandlung von Wildtyp Samen mit verschiedenen 9-Lipoxygenase Produkten, welche bei der Alterung ansteigen, f{\"u}hrte allerdings nicht zu einer Keimungshemmung. Somit scheinen Produkte wie Hydroxy- und Ketofetts{\"a}uren der 9-Lipoxygenase LOX1 nicht die Hauptursache f{\"u}r die Keimungshemmung nach Alterung zu sein. Dar{\"u}ber hinaus konnte in dieser Arbeit gezeigt werden, dass eine Behandlung der Bl{\"u}ten des Wildtyps mit Methyljasmonat zu einer signifikant h{\"o}heren Keimrate der Samen im Vergleich zu Samen von unbehandelten Pflanzen nach Alterung f{\"u}hrt. Ein „Lipidprofiling" der Samen von mit Methyljasmonat behandelten Pflanzen wies signifikant geringere Gehalte sowohl an freien als auch veresterten oxidierten Fetts{\"a}uren auf, was mit einer erh{\"o}hten Lebensf{\"a}higkeit korrelierte. Diese Erkenntnisse k{\"o}nnten von großer Relevanz f{\"u}r die Landwirtschaft sein, falls eine {\"U}bertragung auf Nutzpflanzen m{\"o}glich ist. Ein weiterer Schwerpunkt dieser Arbeit war eine eingehende Untersuchung der Rolle und Funktion der LOX6. Mit Hilfe von GUS F{\"a}rbungen konnte eine Lokalisation der LOX6 in Bl{\"a}ttern und Wurzeln nachgewiesen werden. Zudem wurde ein 35SLOX6GFP Konstrukt erstellt und in Arabidopsis thaliana Pflanzen stabil transformiert. Mit den selektionierten Linien k{\"o}nnte in Zukunft auch die intrazellul{\"a}re Lokalisation der LOX6 untersucht werden. Außerdem wurden Konstrukte mit dem Reportergen GFP und AOS sowie LOX2 hinter dem 35S Promotor kloniert, welche ebenfalls f{\"u}r weitere Lokalisations- und Kolokalisationsstudien genutzt werden k{\"o}nnen. Zudem wurde mit der Klonierung eines Konstruktes begonnen, um in Zukunft einen spezifischen LOX6 Antik{\"o}rper herstellen und auch die endogene LOX6 Lokalisation in dem Wildtyp analysieren zu k{\"o}nnen. Um die Produkte der LOX6 zu untersuchen, wurden 35SLOX6 Linien sowie die lox6 Mutante verwendet. Obwohl Hydroxyfetts{\"a}uren und Jasmonate Folgeprodukte der LOX6 sind, wiesen die 35SLOX6 Linien weder basal, noch nach Stress erh{\"o}hte Gehalte dieser im Vergleich zum Wildtyp auf. Somit geben die 35SLOX6 Linien einen Hinweis darauf, dass LOX6 im Wildtyp nicht limitierend f{\"u}r die Produktion von Hydroxyfetts{\"a}uren und Jasmonaten sein k{\"o}nnte. Um zu untersuchen, ob das Substrat der LOX6 der limitierende Faktor sein k{\"o}nnte, wurde eine Behandlung mit α Linolens{\"a}ure durchgef{\"u}hrt. Dabei entstanden allerdings nicht mehr Folgeprodukte der LOX6, sondern es fand sowohl in den 35SLOX6 Linien als auch in dem Wildtyp eine massive nicht enzymatische radikalische Oxidation der Fetts{\"a}uren statt. Um festzustellen, ob sich durch eine LOX6 {\"U}berexpression das Metabolom {\"a}ndert, wurde eine „untargeted Analyse" mit 35SLOX6 Linien durchgef{\"u}hrt. Diese zeigte vier Metabolite, welche in den 35SLOX6 Linien im Vergleich zum Wildtyp unterschiedlich stark vorhanden waren. Zudem sollte untersucht werden, ob sich die Physiologie und Stressresistenz in den {\"U}berexpressionslinien im Vergleich zum Wildtyp unterscheiden. Dabei zeichneten sich die 35SLOX6 Linien durch kleinere, hellere und rundere Bl{\"a}tter aus. Zudem wurden die Wurzeln der 35SLOX6 Linien bei Fraßversuchen mit Pocellio scaber im Vergleich zum Wildtyp weniger bevorzugt gefressen. Diese Erkenntnisse sowie die generierten Konstrukte und Pflanzenlinien k{\"o}nnen in der Zukunft einen weiteren Einblick in die vielf{\"a}ltigen Funktionen und Produkte der LOX6 gew{\"a}hren.}, subject = {Jasmonate}, language = {de} } @phdthesis{Zott2016, author = {Zott, Maximilian}, title = {Extreme Value Theory in Higher Dimensions - Max-Stable Processes and Multivariate Records}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-136614}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2016}, abstract = {Die Extremwerttheorie behandelt die stochastische Modellierung seltener und extremer Ereignisse. W{\"a}hrend fundamentale Theorien in der klassischen Stochastik, wie etwa die Gesetze der großen Zahlen oder der zentrale Grenzwertsatz das asymptotische Verhalten der Summe von Zufallsvariablen untersucht, liegt in der Extremwerttheorie der Fokus auf dem Maximum oder dem Minimum einer Menge von Beobachtungen. Die Grenzverteilung des normierten Stichprobenmaximums unter einer Folge von unabh{\"a}ngigen und identisch verteilten Zufallsvariablen kann durch sogenannte max-stabile Verteilungen charakterisiert werden. In dieser Dissertation werden verschiedene Aspekte der Theorie der max-stabilen Zufallsvektoren und stochastischen Prozesse behandelt. Insbesondere wird der Begriff der 'Differenzierbarkeit in Verteilung' eines max-stabilen Prozesses eingef{\"u}hrt und untersucht. Ferner werden 'verallgemeinerte max-lineare Modelle' eingef{\"u}hrt, um einen bekannten max-stabilen Zufallsvektor durch einen max-stabilen Prozess zu interpolieren. Dar{\"u}ber hinaus wird der Zusammenhang von extremwerttheoretischen Methoden mit der Theorie der multivariaten Rekorde hergestellt. Insbesondere werden sogenannte 'vollst{\"a}ndige' und 'einfache' Rekorde eingef{\"u}hrt, und deren asymptotisches Verhalten untersucht.}, subject = {Stochastischer Prozess}, language = {en} } @article{ZlamyAlmanzarParsonetal.2016, author = {Zlamy, Manuela and Almanzar, Giovanni and Parson, Walther and Schmidt, Christian and Leierer, Johannes and Weinberger, Birgit and Jeller, Verena and Unsinn, Karin and Eyrich, Matthias and W{\"u}rzner, Reinhard and Prelog, Martina}, title = {Efforts of the human immune system to maintain the peripheral CD8+ T cell compartment after childhood thymectomy}, series = {Immunity \& Ageing}, volume = {13}, journal = {Immunity \& Ageing}, number = {3}, doi = {10.1186/s12979-016-0058-z}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-146497}, year = {2016}, abstract = {Background Homeostatic mechanisms to maintain the T cell compartment diversity indicate an ongoing process of thymic activity and peripheral T cell renewal during human life. These processes are expected to be accelerated after childhood thymectomy and by the influence of cytomegalovirus (CMV) inducing a prematurely aged immune system. The study aimed to investigate proportional changes and replicative history of CD8+ T cells, of recent thymic emigrants (RTEs) and CD103+ T cells (mostly gut-experienced) and the role of Interleukin-(IL)-7 and IL-7 receptor (CD127)-expressing T cells in thymectomized patients compared to young and old healthy controls. Results Decreased proportions of naive and CD31 + CD8+ T cells were demonstrated after thymectomy, with higher proliferative activity of CD127-expressing T cells and significantly shorter relative telomere lengths (RTLs) and lower T cell receptor excision circles (TRECs). Increased circulating CD103+ T cells and a skewed T cell receptor (TCR) repertoire were found after thymectomy similar to elderly persons. Naive T cells were influenced by age at thymectomy and further decreased by CMV. Conclusions After childhood thymectomy, the immune system demonstrated constant efforts of the peripheral CD8+ T cell compartment to maintain homeostasis. Supposedly it tries to fill the void of RTEs by peripheral T cell proliferation, by at least partly IL-7-mediated mechanisms and by proportional increase of circulating CD103+ T cells, reminiscent of immune aging in elderly. Although other findings were less significant compared to healthy elderly, early thymectomy demonstrated immunological alterations of CD8+ T cells which mimic features of premature immunosenescence in humans.}, language = {en} } @article{ZipfelEyrichSchlegeletal.2016, author = {Zipfel, Julian and Eyrich, Matthias and Schlegel, Paul-Gerhardt and Wiegering, Verena}, title = {Disturbed B cell and DC-Homeostasis in Pediatric cGVHD Patients-Cocultivation Experiments and Review of the Literature}, series = {Clinics in Oncology}, volume = {1}, journal = {Clinics in Oncology}, number = {1097}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-147914}, year = {2016}, abstract = {B cells and DCs are suspected to play an important role in the pathogenesis of cGvHD, which is a serious complication of HSCT with high morbidity. It is characterized by immune responses of donor immune cells against recipient-derived antigens. athogenesis is not yet fully understood, however reconstitution of B cells after HSCT has similarities to physiologic ontogeny. Immunophenotyping and co-cultivation-experiments of B cells and DCs from pediatric patients with cGvHD as well as healthy donors were conducted. Significant differences between patients and healthy donors were observed with increased memory, transitional, CD69+ and CD86+ phenotype and lower levels of na{\"i}ve B cells due to apoptosis. Co-cultivation revealed this to be primarily B cell-dependent without major effects of and with DCs. There was a decreased CD11c- phenotype in patients and less apoptosis of DCs. Our data suggest a disturbed homeostasis in B cells with increased memory phenotype in patients, whereas DCs could not influence these differences, therefore DCs are not imposing as promising targets. B cell-dependent approaches should be further investigated.}, language = {en} } @article{ZinnerMoralesAlamoOrtenbladetal.2016, author = {Zinner, Christoph and Morales-Alamo, David and {\O}rtenblad, Niels and Larsen, Filip J. and Schiffer, Tomas A. and Willis, Sarah J. and Gelabert-Rebato, Miriam and Perez-Valera, Mario and Boushel, Robert and Calbet, Jose A. L. and Holmberg, Hans-Christer}, title = {The Physiological Mechanisms of Performance Enhancement with Sprint Interval Training Differ between the Upper and Lower Extremities in Humans}, series = {Frontiers in Physiology}, volume = {7}, journal = {Frontiers in Physiology}, number = {426}, doi = {10.3389/fphys.2016.00426}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-165257}, year = {2016}, abstract = {To elucidate the mechanisms underlying the differences in adaptation of arm and leg muscles to sprint training, over a period of 11 days 16 untrained men performed six sessions of 4-6 × 30-s all-out sprints (SIT) with the legs and arms, separately, with a 1-h interval of recovery. Limb-specific VO2peak, sprint performance (two 30-s Wingate tests with 4-min recovery), muscle efficiency and time-trial performance (TT, 5-min all-out) were assessed and biopsies from the m. vastus lateralis and m. triceps brachii taken before and after training. VO2peak and Wmax increased 3-11\% after training, with a more pronounced change in the arms (P < 0.05). Gross efficiency improved for the arms (+8.8\%, P < 0.05), but not the legs (-0.6\%). Wingate peak and mean power outputs improved similarly for the arms and legs, as did TT performance. After training, VO2 during the two Wingate tests was increased by 52 and 6\% for the arms and legs, respectively (P < 0.001). In the case of the arms, VO2 was higher during the first than second Wingate test (64 vs. 44\%, P < 0.05). During the TT, relative exercise intensity, HR, VO2, VCO2, VE, and Vt were all lower during arm-cranking than leg-pedaling, and oxidation of fat was minimal, remaining so after training. Despite the higher relative intensity, fat oxidation was 70\% greater during leg-pedaling (P = 0.017). The aerobic energy contribution in the legs was larger than for the arms during the Wingate tests, although VO2 for the arms was enhanced more by training, reducing the O2 deficit after SIT. The levels of muscle glycogen, as well as the myosin heavy chain composition were unchanged in both cases, while the activities of 3-hydroxyacyl-CoA-dehydrogenase and citrate synthase were elevated only in the legs and capillarization enhanced in both limbs. Multiple regression analysis demonstrated that the variables that predict TT performance differ for the arms and legs. The primary mechanism of adaptation to SIT by both the arms and legs is enhancement of aerobic energy production. However, with their higher proportion of fast muscle fibers, the arms exhibit greater plasticity.}, language = {en} } @article{ZinnerKruegerReedetal.2016, author = {Zinner, C. and Krueger, M. and Reed, J. L. and Kohl-Bareis, M. and Holmberg, H. C. and Sperlich, B.}, title = {Exposure to a combination of heat and hyperoxia during cycling at submaximal intensity does not alter thermoregulatory responses}, series = {Biology of Sport}, volume = {33}, journal = {Biology of Sport}, number = {1}, doi = {10.5604/20831862.1192041}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-160993}, pages = {71-76}, year = {2016}, abstract = {In this study, we tested the hypothesis that breathing hyperoxic air (F\(_{in}\)O\(_2\) = 0.40) while exercising in a hot environment exerts negative effects on the total tissue level of haemoglobin concentration (tHb); core (T\(_{core}\)) and skin (T\(_{skin}\)) temperatures; muscle activity; heart rate; blood concentration of lactate; pH; partial pressure of oxygen (P\(_a\)O\(_2\)) and carbon dioxide; arterial oxygen saturation (S\(_a\)O\(_2\)); and perceptual responses. Ten well-trained male athletes cycled at submaximal intensity at 21°C or 33°C in randomized order: first for 20 min while breathing normal air (FinO\(_2\) = 0.21) and then 10 min with F\(_{in}\)O\(_2\) = 0.40 (HOX). At both temperatures, S\(_a\)O\(_2\) and P\(_a\)O\(_2\), but not tHb, were increased by HOX. Tskin and perception of exertion and thermal discomfort were higher at 33°C than 21°C (p < 0.01), but independent of F\(_{in}\)O\(_2\). T\(_{core}\) and muscle activity were the same under all conditions (p > 0.07). Blood lactate and heart rate were higher at 33°C than 21°C. In conclusion, during 30 min of submaximal cycling at 21°C or 33°C, T\(_{core}\), T\(_{skin}\) and T\(_{body}\), tHb, muscle activity and ratings of perceived exertion and thermal discomfort were the same under normoxic and hyperoxic conditions. Accordingly, breathing hyperoxic air (F\(_{in}\)O\(_2\) = 0.40) did not affect thermoregulation under these conditions.}, language = {en} } @phdthesis{Ziegler2016, author = {Ziegler, Christiane}, title = {Epigenetic Mechanisms in the Pathogenesis and Therapy of Anxiety Disorders}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-146815}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2016}, abstract = {Anxiety disorders (AD) are common, disabling mental disorders, which constitute the most prevalent mental health condition conveying a high individual and socioeconomic burden. Social anxiety disorder (SAD), i.e. fear in social situations particularly when subjectively scrutinized by others, is the second most common anxiety disorder with a life time prevalence of 10\%. Panic disorder (PD) has a life time prevalence of 2-5\% and is characterized by recurrent and abrupt surges of intense fear and anticipatory anxiety, i.e. panic attacks, occurring suddenly and unexpected without an apparent cue. In recent years, psychiatric research increasingly focused on epigenetic mechanisms such as DNA methylation as a possible solution for the problem of the so-called "hidden heritability", which conceptualizes the fact that the genetic risk variants identified so far only explain a small part of the estimated heritability of mental disorders. In the first part of this thesis, oxytocin receptor (OXTR) gene methylation was investigated regarding its role in the pathogenesis of social anxiety disorder. In summary, OXTR methylation patterns were implicated in different phenotypes of social anxiety disorder on a categorical, neuropsychological, neuroendocrinological as well as on a neural network level. The results point towards a multilevel role of OXTR gene hypomethylation particularly at one CpG site (CpG3, Chr3: 8 809 437) within the protein coding region of the gene in SAD. The second part of the thesis investigated monoamine oxidase A (MAOA) gene methylation regarding its role in the pathogenesis of panic disorder as well as - applying a psychotherapy-epigenetic approach - its dynamic regulation during the course of cognitive behavioural therapy (CBT) in PD patients. First, MAOA hypomethylation was shown to be associated with panic disorder as well as with panic disorder severity. Second, in patients responding to treatment MAOA hypomethylation was shown to be reversible up to the level of methylation in healthy controls after the course of CBT. This increase in MAOA methylation along with successful psychotherapeutic treatment was furthermore shown to be associated with symptom improvement regarding agoraphobic avoidance in an independent replication sample of non-medicated patients with PD. Taken together, in the future the presently identified epigenetic patterns might contribute to establishing targeted preventive interventions and personalized treatment options for social anxiety disorder or panic disorder, respectively.}, subject = {Angst}, language = {en} } @article{ZieglerRichterMahretal.2016, author = {Ziegler, C. and Richter, J. and Mahr, M. and Gajewska, A. and Schiele, M.A. and Gehrmann, A. and Schmidt, B. and Lesch, K.-P. and Lang, T. and Helbig-Lang, S. and Pauli, P. and Kircher, T. and Reif, A. and Rief, W. and Vossbeck-Elsebusch, A.N. and Arolt, V. and Wittchen, H.-U. and Hamm, A.O. and Deckert, J. and Domschke, K.}, title = {MAOA gene hypomethylation in panic disorder-reversibility of an epigenetic risk pattern by psychotherapy}, series = {Translational Psychiatry}, journal = {Translational Psychiatry}, number = {6}, doi = {10.1038/tp.2016.41}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-164422}, pages = {e773}, year = {2016}, abstract = {Epigenetic signatures such as methylation of the monoamine oxidase A (MAOA) gene have been found to be altered in panic disorder (PD). Hypothesizing temporal plasticity of epigenetic processes as a mechanism of successful fear extinction, the present psychotherapy-epigenetic study for we believe the first time investigated MAOA methylation changes during the course of exposure-based cognitive behavioral therapy (CBT) in PD. MAOA methylation was compared between N=28 female Caucasian PD patients (discovery sample) and N=28 age- and sex-matched healthy controls via direct sequencing of sodium bisulfite-treated DNA extracted from blood cells. MAOA methylation was furthermore analyzed at baseline (T0) and after a 6-week CBT (T1) in the discovery sample parallelized by a waiting time in healthy controls, as well as in an independent sample of female PD patients (N=20). Patients exhibited lower MAOA methylation than healthy controls (P<0.001), and baseline PD severity correlated negatively with MAOA methylation (P=0.01). In the discovery sample, MAOA methylation increased up to the level of healthy controls along with CBT response (number of panic attacks; T0-T1: +3.37±2.17\%), while non-responders further decreased in methylation (-2.00±1.28\%; P=0.001). In the replication sample, increases in MAOA methylation correlated with agoraphobic symptom reduction after CBT (P=0.02-0.03). The present results support previous evidence for MAOA hypomethylation as a PD risk marker and suggest reversibility of MAOA hypomethylation as a potential epigenetic correlate of response to CBT. The emerging notion of epigenetic signatures as a mechanism of action of psychotherapeutic interventions may promote epigenetic patterns as biomarkers of lasting extinction effects.}, language = {en} } @article{ZhuShabalaCuinetal.2016, author = {Zhu, Min and Shabala, Lana and Cuin, Tracey A. and Huang, Xin and Zhou, Meixue and Munns, Rana and Shabala, Sergey}, title = {Nax loci affect SOS1-like Na\(^+\)/H\(^+\) exchanger expression and activity in wheat}, series = {Journal of Experimental Botany}, volume = {67}, journal = {Journal of Experimental Botany}, number = {3}, doi = {10.1093/jxb/erv493}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-190908}, pages = {835-844}, year = {2016}, abstract = {Salinity stress tolerance in durum wheat is strongly associated with a plant's ability to control Na\(^+\) delivery to the shoot. Two loci, termed Nax1 and Nax2, were recently identified as being critical for this process and the sodium transporters HKT1;4 and HKT1; 5 were identified as the respective candidate genes. These transporters retrieve Na\(^+\) from the xylem, thus limiting the rates of Na\(^+\) transport from the root to the shoot. In this work, we show that the Nax loci also affect activity and expression levels of the SOS1-like Na\(^+\)/H\(^+\) exchanger in both root cortical and stelar tissues. Net Na\(^+\) efflux measured in isolated steles from salt-treated plants, using the non-invasive ion flux measuring MIFE technique, decreased in the sequence: Tamaroi (parental line)>Nax1=Nax2>Nax1:Nax2 lines. This efflux was sensitive to amiloride (a known inhibitor of the Na\(^+\)/H\(^+\) exchanger) and was mirrored by net H\(^+\) flux changes. TdSOS1 relative transcript levels were 6-10-fold lower in Nax lines compared with Tamaroi. Thus, it appears that Nax loci confer two highly complementary mechanisms, both of which contribute towards reducing the xylem Na\(^+\) content. One enhances the retrieval of Na\(^+\) back into the root stele via HKT1;4 or HKT1;5, whilst the other reduces the rate of Na\(^+\) loading into the xylem via SOS1. It is suggested that such duality plays an important adaptive role with greater versatility for responding to a changing environment and controlling Na\(^+\) delivery to the shoot.}, language = {en} } @article{ZhuShabalaCuinetal.2016, author = {Zhu, Min and Shabala, Lana and Cuin, Tracey A and Huang, Xin and Zhou, Meixue and Munns, Rana and Shabala, Sergey}, title = {Nax loci affect SOS1-like Na\(^{+}\)/H\(^{+}\) exchanger expression and activity in wheat}, series = {Journal of Experimental Botany}, volume = {67}, journal = {Journal of Experimental Botany}, number = {3}, doi = {10.1093/jxb/erv493}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-150236}, pages = {835-844}, year = {2016}, abstract = {Salinity stress tolerance in durum wheat is strongly associated with a plant's ability to control Na\(^{+}\) delivery to the shoot. Two loci, termed Nax1 and Nax2, were recently identified as being critical for this process and the sodium transporters HKT1;4 and HKT1;5 were identified as the respective candidate genes. These transporters retrieve Na\(^{+}\) from the xylem, thus limiting the rates of Na\(^{+}\) transport from the root to the shoot. In this work, we show that the Nax loci also affect activity and expression levels of the SOS1-like Na\(^{+}\)/H\(^{+}\) exchanger in both root cortical and stelar tissues. Net Na\(^{+}\) efflux measured in isolated steles from salt-treated plants, using the non-invasive ion flux measuring MIFE technique, decreased in the sequence: Tamaroi (parental line)>Nax1=Nax2>Nax1:Nax2 lines. This efflux was sensitive to amiloride (a known inhibitor of the Na\(^{+}\)/H\(^{+}\) exchanger) and was mirrored by net H\(^{+}\) flux changes. TdSOS1 relative transcript levels were 6-10-fold lower in Nax lines compared with Tamaroi. Thus, it appears that Nax loci confer two highly complementary mechanisms, both of which contribute towards reducing the xylem Na\(^{+}\) content. One enhances the retrieval of Na\(^{+}\) back into the root stele via HKT1;4 or HKT1;5, whilst the other reduces the rate of Na\(^{+}\) loading into the xylem via SOS1. It is suggested that such duality plays an important adaptive role with greater versatility for responding to a changing environment and controlling Na\(^{+}\) delivery to the shoot.}, language = {en} } @article{ZhouAllisonKuebleretal.2016, author = {Zhou, Sijie and Allison, Brendan Z. and K{\"u}bler, Andrea and Cichocki, Andrzej and Wang, Xingyu and Jin, Jing}, title = {Effects of Background Music on Objective and Subjective Performance Measures in an Auditory BCI}, series = {Frontiers in Computational Neuroscience}, volume = {10}, journal = {Frontiers in Computational Neuroscience}, number = {105}, doi = {10.3389/fncom.2016.00105}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-165101}, year = {2016}, abstract = {Several studies have explored brain computer interface (BCI) systems based on auditory stimuli, which could help patients with visual impairments. Usability and user satisfaction are important considerations in any BCI. Although background music can influence emotion and performance in other task environments, and many users may wish to listen to music while using a BCI, auditory, and other BCIs are typically studied without background music. Some work has explored the possibility of using polyphonic music in auditory BCI systems. However, this approach requires users with good musical skills, and has not been explored in online experiments. Our hypothesis was that an auditory BCI with background music would be preferred by subjects over a similar BCI without background music, without any difference in BCI performance. We introduce a simple paradigm (which does not require musical skill) using percussion instrument sound stimuli and background music, and evaluated it in both offline and online experiments. The result showed that subjects preferred the auditory BCI with background music. Different performance measures did not reveal any significant performance effect when comparing background music vs. no background. Since the addition of background music does not impair BCI performance but is preferred by users, auditory (and perhaps other) BCIs should consider including it. Our study also indicates that auditory BCIs can be effective even if the auditory channel is simultaneously otherwise engaged.}, language = {en} } @article{ZayatsJacobsenKleppeetal.2016, author = {Zayats, T and Jacobsen, KK and Kleppe, R and Jacob, CP and Kittel-Schneider, S and Ribas{\´e}s, M and Ramos-Quiroga, JA and Richarte, V and Casas, M and Mota, NR and Grevet, EH and Klein, M and Corominas, J and Bralten, J and Galesloot, T and Vasquez, AA and Herms, S and Forstner, AJ and Larsson, H and Breen, G and Asherson, P and Gross-Lesch, S and Lesch, KP and Cichon, S and Gabrielsen, MB and Holmen, OL and Bau, CHD and Buitelaar, J and Kiemeney, L and Faraone, SV and Cormand, B and Franke, B and Reif, A and Haavik, J and Johansson, S}, title = {Exome chip analyses in adult attention deficit hyperactivity disorder}, series = {Translational Psychiatry}, volume = {6}, journal = {Translational Psychiatry}, number = {e923}, doi = {10.1038/tp.2016.196}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-168297}, year = {2016}, abstract = {Attention-deficit/hyperactivity disorder (ADHD) is a highly heritable childhood-onset neuropsychiatric condition, often persisting into adulthood. The genetic architecture of ADHD, particularly in adults, is largely unknown. We performed an exome-wide scan of adult ADHD using the Illumina Human Exome Bead Chip, which interrogates over 250 000 common and rare variants. Participants were recruited by the International Multicenter persistent ADHD CollaboraTion (IMpACT). Statistical analyses were divided into 3 steps: (1) gene-level analysis of rare variants (minor allele frequency (MAF)<1\%); (2) single marker association tests of common variants (MAF⩾1\%), with replication of the top signals; and (3) pathway analyses. In total, 9365 individuals (1846 cases and 7519 controls) were examined. Replication of the most associated common variants was attempted in 9847 individuals (2077 cases and 7770 controls) using fixed-effects inverse variance meta-analysis. With a Bonferroni-corrected significance level of 1.82E-06, our analyses of rare coding variants revealed four study-wide significant loci: 6q22.1 locus (P=4.46E-08), where NT5DC1 and COL10A1 reside; the SEC23IP locus (P=6.47E-07); the PSD locus (P=7.58E-08) and ZCCHC4 locus (P=1.79E-06). No genome-wide significant association was observed among the common variants. The strongest signal was noted at rs9325032 in PPP2R2B (odds ratio=0.81, P=1.61E-05). Taken together, our data add to the growing evidence of general signal transduction molecules (NT5DC1, PSD, SEC23IP and ZCCHC4) having an important role in the etiology of ADHD. Although the biological implications of these findings need to be further explored, they highlight the possible role of cellular communication as a potential core component in the development of both adult and childhood forms of ADHD.}, language = {en} } @article{ZahnertLoewenheimBeutneretal.2016, author = {Zahnert, Thomas and L{\"o}wenheim, Hubert and Beutner, Dirk and Hagen, Rudolf and Ernst, Arneborg and Pau, Hans-Wilhelm and Zehlicke, Thorsten and K{\"u}hne, Hilke and Friese, Natascha and Tropitzsch, Anke and L{\"u}ers, Jan-Christoffer and Mlynski, Robert and Todt, Ingo and H{\"u}ttenbrink, Karl-Bernd}, title = {Multicenter Clinical Trial of Vibroplasty Couplers to Treat Mixed/Conductive Hearing Loss: First Results}, series = {Audiology and Neurotology}, volume = {21}, journal = {Audiology and Neurotology}, number = {4}, issn = {1420-3030}, doi = {10.1159/000444616}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-199129}, pages = {212-222}, year = {2016}, abstract = {Objective: To evaluate the safety and effectiveness of round window (RW), oval window (OW), CliP and Bell couplers for use with an active middle ear implant. Methods: This is a multicenter, long-term, prospective trial with consecutive enrollment, involving 6 university hospitals in Germany. Bone conduction, air conduction, implant-aided warble-tone thresholds and Freiburger monosyllable word recognition scores were compared with unaided preimplantation results in 28 moderate-to-profound hearing-impaired patients after 12 months of follow-up. All patients had previously undergone failed reconstruction surgeries (up to 5 or more). In a subset of patients, additional speech tests at 12 months postoperatively were used to compare the aided with the unaided condition after implantation with the processor switched off. An established quality-of-life questionnaire for hearing aids was used to determine patient satisfaction. Results: Postoperative bone conduction remained stable. Mean functional gain for all couplers was 37 dB HL (RW = 42 dB, OW = 35 dB, Bell = 38 dB, CliP = 27 dB). The mean postoperative Freiburger monosyllable score was 71\% at 65 dB SPL. The postimplantation mean SRT50 (speech reception in quiet for 50\% understanding of words in sentences) improved on average by 23 dB over unaided testing and signal-to-noise ratios also improved in all patients. The International Outcome Inventory for Hearing Aids (IOI-HA)quality-of-life questionnaire was scored very positively by all patients. Conclusion: A significant improvement was seen with all couplers, and patients were satisfied with the device at 12 months postoperatively. These results demonstrate that an active implant is an advantage in achieving good hearing benefit in patients with prior failed reconstruction surgery.}, language = {en} } @article{YadavSelvarajBenderetal.2016, author = {Yadav, Preeti and Selvaraj, Bhuvaneish T. and Bender, Florian L. P. and Behringer, Marcus and Moradi, Mehri and Sivadasan, Rajeeve and Dombert, Benjamin and Blum, Robert and Asan, Esther and Sauer, Markus and Julien, Jean-Pierre and Sendtner, Michael}, title = {Neurofilament depletion improves microtubule dynamics via modulation of Stat3/stathmin signaling}, series = {Acta Neuropathologica}, volume = {132}, journal = {Acta Neuropathologica}, number = {1}, doi = {10.1007/s00401-016-1564-y}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-188234}, pages = {93-110}, year = {2016}, abstract = {In neurons, microtubules form a dense array within axons, and the stability and function of this microtubule network is modulated by neurofilaments. Accumulation of neurofilaments has been observed in several forms of neurodegenerative diseases, but the mechanisms how elevated neurofilament levels destabilize axons are unknown so far. Here, we show that increased neurofilament expression in motor nerves of pmn mutant mice, a model of motoneuron disease, causes disturbed microtubule dynamics. The disease is caused by a point mutation in the tubulin-specific chaperone E (Tbce) gene, leading to an exchange of the most C-terminal amino acid tryptophan to glycine. As a consequence, the TBCE protein becomes instable which then results in destabilization of axonal microtubules and defects in axonal transport, in particular in motoneurons. Depletion of neurofilament increases the number and regrowth of microtubules in pmn mutant motoneurons and restores axon elongation. This effect is mediated by interaction of neurofilament with the stathmin complex. Accumulating neurofilaments associate with stathmin in axons of pmn mutant motoneurons. Depletion of neurofilament by Nefl knockout increases Stat3-stathmin interaction and stabilizes the microtubules in pmn mutant motoneurons. Consequently, counteracting enhanced neurofilament expression improves axonal maintenance and prolongs survival of pmn mutant mice. We propose that this mechanism could also be relevant for other neurodegenerative diseases in which neurofilament accumulation and loss of microtubules are prominent features.}, language = {en} } @phdthesis{Yadav2016, author = {Yadav, Preeti}, title = {Studying Neuronal Cytoskeleton Defects and Synaptic Defects in Mouse Model of Amyotrophic Lateral Sclerosis and Spinal Muscular Atrophy}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-138093}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2016}, abstract = {Amyotrophic lateral sclerosis and spinal muscular atrophy are the two most common motoneuron diseases. Both are characterized by destabilization of axon terminals, axon degeneration and alterations in neuronal cytoskeleton. Accumulation of neurofilaments has been observed in several neurodegenerative diseases but the mechanisms how elevated neurofilament levels destabilize axons are unknown so far. Here, I show that increased neurofilament expression in motor nerves of pmn mutant mice causes disturbed microtubule dynamics. Depletion of neurofilament by Nefl knockout increases the number and regrowth of microtubules in pmn mutant motoneurons and restores axon elongation. This effect is mediated by interaction of neurofilament with the stathmin complex. Depletion of neurofilament increases stathmin-Stat3 interaction and stabilizes the microtubules. Consequently, the axonal maintenance is improved and the pmn mutant mice survive longer. We propose that this mechanism could also be relevant for other neurodegenerative diseases in which neurofilament accumulation is a prominent feature. Next, using Smn-/-;SMN2 mouse as a model, the molecular mechanism behind synapse loss in SMA is studied. SMA is characterized by degeneration of lower α-motoneurons in spinal cord; however, how reduction of ubiquitously expressed SMN leads to MN-specific degeneration remains unclear. SMN is involved in pre-mRNA splicing (Pellizzoni, Kataoka et al. 1998) and its deficiency in SMA affects the splicing machinery. Neuromuscular junction denervation precedes neurodegeneration in SMA. However, there is no evidence of a link between aberrant splicing of transcripts downstream of Smn and reduced presynaptic axon excitability observed in SMA. In this study, we observed that expression and splicing of Nrxn2, that encodes a presynaptic protein is affected in the SMA mouse and that Nrxn2 could be a candidate that relates aberrant splicing to synaptic motoneuron defects in SMA.}, subject = {Neurofilament}, language = {en} } @article{XuHeKaiseretal.2016, author = {Xu, Li and He, Jianzheng and Kaiser, Andrea and Gr{\"a}ber, Nikolas and Schl{\"a}ger, Laura and Ritze, Yvonne and Scholz, Henrike}, title = {A Single Pair of Serotonergic Neurons Counteracts Serotonergic Inhibition of Ethanol Attraction in Drosophila}, series = {PLoS ONE}, volume = {11}, journal = {PLoS ONE}, number = {12}, doi = {10.1371/journal.pone.0167518}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-166762}, pages = {e0167518}, year = {2016}, abstract = {Attraction to ethanol is common in both flies and humans, but the neuromodulatory mechanisms underlying this innate attraction are not well understood. Here, we dissect the function of the key regulator of serotonin signaling—the serotonin transporter-in innate olfactory attraction to ethanol in Drosophila melanogaster. We generated a mutated version of the serotonin transporter that prolongs serotonin signaling in the synaptic cleft and is targeted via the Gal4 system to different sets of serotonergic neurons. We identified four serotonergic neurons that inhibit the olfactory attraction to ethanol and two additional neurons that counteract this inhibition by strengthening olfactory information. Our results reveal that compensation can occur on the circuit level and that serotonin has a bidirectional function in modulating the innate attraction to ethanol. Given the evolutionarily conserved nature of the serotonin transporter and serotonin, the bidirectional serotonergic mechanisms delineate a basic principle for how random behavior is switched into targeted approach behavior.}, language = {en} } @article{WoelflingBeckerUhletal.2016, author = {W{\"o}lfling, Mirko and Becker, Mira C. and Uhl, Britta and Traub, Anja and Fiedler, Konrad}, title = {How differences in the settling behaviour of moths (Lepidoptera) may contribute to sampling bias when using automated light traps}, series = {European Journal of Entomology}, volume = {113}, journal = {European Journal of Entomology}, doi = {10.14411/eje.2016.066}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-191154}, pages = {502-506}, year = {2016}, abstract = {Quantitative community-wide moth surveys frequently employ flight-interception traps equipped with UV-light emitting sources as attractants. It has long been known that moth species differ in their responsiveness to light traps. We studied how the settling behaviour of moths at a light trap may further contribute to sampling bias. We observed the behaviour of 1426 moths at a light tower. Moths were classified as either, settling and remaining still after arrival, or continually moving on the gauze for extended periods of time. Moths that did not move after settling may not end up in the sampling container of the light trap and therefore are under-represented in automated trap samples relative to their true proportions in the community. Our analyses revealed highly significant behavioural differences between moths that differed in body size. Small moths were more likely to remain stationary after settling. As a corollary, representatives of three taxa, which in Europe are predominantly small species (Nolidae, Geometridae: Eupitheciini, Erebidae: Lithosiini), usually settled down immediately, whereas most other moths remained active on or flying around the trap for some time. Moth behaviour was also modulated by ambient temperature. At high temperatures, they were less likely to settle down immediately, but this behavioural difference was most strongly apparent among medium-sized moths. These results indicate the likely extent of the sampling bias when analysing and interpreting automated light-trap samples. Furthermore, to control for temperature modulated sampling bias temperature should always be recorded when sampling moths using flight-interception traps.}, language = {en} } @article{WaechtlerKuebelBarthelmesetal.2016, author = {W{\"a}chtler, Maria and K{\"u}bel, Joachim and Barthelmes, Kevin and Winter, Andreas and Schmiedel, Alexander and Pascher, Torbj{\"o}rn and Lambert, Christoph and Schubert, Ulrich S. and Dietzek, Benjamin}, title = {Energy transfer and formation of long-lived \(^3\)MLCT states in multimetallic complexes with extended highly conjugated bis-terpyridyl ligands}, series = {Physical Chemistry Chemical Physics}, volume = {18}, journal = {Physical Chemistry Chemical Physics}, number = {4}, doi = {10.1039/c5cp04447b}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-191041}, pages = {2350-2360}, year = {2016}, abstract = {Multimetallic complexes with extended and highly conjugated bis-2,2':6',2''-terpyridyl bridging ligands, which present building blocks for coordination polymers, are investigated with respect to their ability to act as light-harvesting antennae. The investigated species combine Ru(II)- with Os(II)- and Fe(II)-terpyridyl chromophores, the latter acting as energy sinks. Due to the extended conjugated system the ligands are able to prolong the lifetime of the \(^3\)MLCT states compared to unsubstituted terpyridyl species by delocalization and energetic stabilization of the \(^3\)MLCT states. This concept is applied for the first time to Fe(II) terpyridyl species and results in an exceptionally long lifetime of 23 ps for the Fe(II) \(^3\)MLCT state. While partial energy (>80\%) transfer is observed between the Ru(II) and Fe(II) centers with a time-constant of 15 ps, excitation energy is transferred completely from the Ru(II) to the Os(II) center within the first 200 fs after excitation.}, language = {en} } @article{WunschHohmannMillesetal.2016, author = {Wunsch, Marie and Hohmann, Christopher and Milles, Bianca and Rostermund, Christina and Lehmann, Paul V. and Schroeter, Michael and Bayas, Antonios and Ulzheimer, Jochen and M{\"a}urer, Mathias and Erg{\"u}n, S{\"u}leyman and Kuerten, Stefanie}, title = {The Correlation between the Virus- and Brain Antigen-Specific B Cell Response in the Blood of Patients with Multiple Sclerosis}, series = {Viruses}, volume = {8}, journal = {Viruses}, number = {4}, doi = {10.3390/v8040105}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-146946}, pages = {105}, year = {2016}, abstract = {There is a largely divergent body of literature regarding the relationship between Epstein-Barr virus (EBV) infection and brain inflammation in multiple sclerosis (MS). Here, we tested MS patients during relapse (n = 11) and in remission (n = 19) in addition to n = 22 healthy controls to study the correlation between the EBV- and brain-specific B cell response in the blood by enzyme-linked immunospot (ELISPOT) and enzyme-linked immunosorbent assay (ELISA). Cytomegalovirus (CMV) was used as a control antigen tested in n = 16 MS patients during relapse and in n = 35 patients in remission. Over the course of the study, n = 16 patients were untreated, while n = 33 patients received immunomodulatory therapy. The data show that there was a moderate correlation between the frequencies of EBV- and brain-reactive B cells in MS patients in remission. In addition we could detect a correlation between the B cell response to EBV and disease activity. There was no evidence of an EBV reactivation. Interestingly, there was also a correlation between the frequencies of CMV- and brain-specific B cells in MS patients experiencing an acute relapse and an elevated B cell response to CMV was associated with higher disease activity. The trend remained when excluding seronegative subjects but was non-significant. These data underline that viral infections might impact the immunopathology of MS, but the exact link between the two entities remains subject of controversy.}, language = {en} } @article{WunschPfisterHenningetal.2016, author = {Wunsch, Kathrin and Pfister, Roland and Henning, Anne and Aschersleben, Gisa and Weigelt, Matthias}, title = {No Interrelation of Motor Planning and Executive Functions across Young Ages}, series = {Frontiers in Psychology}, volume = {7}, journal = {Frontiers in Psychology}, number = {1031}, doi = {10.3389/fpsyg.2016.01031}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-165281}, year = {2016}, abstract = {The present study examined the developmental trajectories of motor planning and executive functioning in children. To this end, we tested 217 participants with three motor tasks, measuring anticipatory planning abilities (i.e., the bar-transport-task, the sword-rotation-task and the grasp-height-task), and three cognitive tasks, measuring executive functions (i.e., the Tower-of-Hanoi-task, the Mosaic-task, and the D2-attention-endurance-task). Children were aged between 3 and 10 years and were separated into age groups by 1-year bins, resulting in a total of eight groups of children and an additional group of adults. Results suggested (1) a positive developmental trajectory for each of the sub-tests, with better task performance as children get older; (2) that the performance in the separate tasks was not correlated across participants in the different age groups; and (3) that there was no relationship between performance in the motor tasks and in the cognitive tasks used in the present study when controlling for age. These results suggest that both, motor planning and executive functions are rather heterogeneous domains of cognitive functioning with fewer interdependencies than often suggested.}, language = {en} } @incollection{Wotruba2016, author = {Wotruba, Markus}, title = {E-Impact -Auswirkungen des Online-Handels auf den Fl{\"a}chenbedarf im station{\"a}ren Handel}, series = {Online-Handel ist Wandel}, booktitle = {Online-Handel ist Wandel}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-185243}, publisher = {Universit{\"a}t W{\"u}rzburg}, pages = {23-37}, year = {2016}, abstract = {No abstract available.}, language = {de} } @phdthesis{Wolfsteiner2016, author = {Wolfsteiner, Ulrike}, title = {Kombination von arterioven{\"o}ser extrakorporaler Lungenassistenz und Hochfrequenzoszillation im Großtier-ARDS-Modell: Einfluss auf den Gasaustausch}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-150828}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2016}, abstract = {Hintergrund: Durch den Einsatz der Hochfrequenzoszillationsbeatmung (HFOV) kann das applizierte Tidalvolumen minimiert und dadurch das Risiko f{\"u}r alveol{\"a}ren Scherstress reduziert werden, allerdings resultieren h{\"o}here Oszillationsfrequenzen in einer insuffizienten CO2-Elimination mit Entstehung einer Hyperkapnie und respiratorischen Azidose. In dieser experimentellen Studie wurde die Auswirkung verschiedener Oszillationsfrequenzen bei der HFOV auf die CO2-Elimination mit und ohne die Hinzunahme einer arterioven{\"o}sen extrakorporalen Lungenassistenz (avECLA) im Großtier-ARDS-Modell untersucht. Unsere Hypothese: die Verwendung hoher Oszillationsfrequenzen und damit die Minimierung des Tidalvolumens erfordert die Kombination einer HFOV mit einer avECLA, um Normokapnie zu erhalten oder wiederherzustellen. Methodik: Hierzu wurden acht gesunde Pietrain-Schweine (56,5 ± 4,4 kg) narkotisiert und intubiert und anschließend mittels pulmonaler Lavage ein schweres iatrogenes ARDS herbeigef{\"u}hrt. Nach einst{\"u}ndiger Stabilisierungsphase (PaO2 durchgehend < 80 mmHg) erfolgte ein Recruitment-Man{\"o}ver und die Einstellung des mittleren Atemwegsdrucks auf 3 cmH2O {\"u}ber dem zuvor bestimmten unteren Inflektionspunkt. Anschließend wurden die Tiere der HFOV zugef{\"u}hrt, randomisiert und mit entweder auf- oder absteigenden Oszillationsfrequenzen jeweils 30 Minuten mit und ohne Hinzunahme der avECLA beatmet. Ergebnisse: Ab Oszillationsfrequenzen von 9 Hz entwickelten die Versuchstiere ohne die Hinzunahme einer avECLA z{\"u}gig eine Hyperkapnie, welcher nur durch die Hinzunahme der avECLA entgegengewirkt werden konnte. Durch das Recruitment-Man{\"o}ver und die Einstellung des mittleren Atemwegsdrucks auf 3 cmH2O {\"u}ber dem unteren Inflektionspunkt konnte die Oxygenierung dauerhaft signifikant verbessert werden (p<0.05). Die Ergebnisse der beiden Gruppen (auf- vs. absteigende Oszillationsfrequenzen) unterschieden sich dabei nicht voneinander. Zusammenfassung: Bei der Hochfrequenzoszillationsbeatmung (HFOV) konnte Normokapnie bei Oszillationsfrequenzen von 9 - 15 Hz nur durch die Kombination mit einer arterioven{\"o}sen extrakorporalen Lungenassistenz (avECLA) aufrecht erhalten werden. Zus{\"a}tzlich konnte nach dem Recruitment-Man{\"o}ver und der Einstellung des mittleren Atemwegsdrucks auf 3 cmH2O {\"u}ber dem unteren Inflektionspunkt auch noch bei sehr hohen Oszillationsfrequenzen eine dauerhafte, signifikante Verbesserung der Oxygenierung verzeichnet werden. Somit demaskiert die avECLA das lungenprotektive Potential der HFOV: die Minimierung der applizierten Tidalvolumina begrenzt nicht nur eine alveol{\"a}re {\"U}berbl{\"a}hung und damit Volutraumata, die Applikation h{\"o}herer mittlerer Atemwegsdr{\"u}cke erm{\"o}glicht dar{\"u}ber hinaus ein pulmonales Recruitment und sch{\"u}tzt die Lunge damit vor Atelekttraumata.}, subject = {ARDS}, language = {de} } @article{WolfBraunHainingetal.2016, author = {Wolf, Karen and Braun, Attila and Haining, Elizabeth J. and Tseng, Yu-Lun and Kraft, Peter and Schuhmann, Michael K. and Gotru, Sanjeev K. and Chen, Wenchun and Hermanns, Heike M. and Stoll, Guido and Lesch, Klaus-Peter and Nieswandt, Bernhard}, title = {Partially Defective Store Operated Calcium Entry and Hem(ITAM) Signaling in Platelets of Serotonin Transporter Deficient Mice}, series = {PLoS One}, volume = {11}, journal = {PLoS One}, number = {1}, doi = {10.1371/journal.pone.0147664}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-146399}, pages = {e0147664}, year = {2016}, abstract = {Background Serotonin (5-hydroxytryptamin, 5-HT) is an indolamine platelet agonist, biochemically derived from tryptophan. 5-HT is secreted from the enterochromaffin cells into the gastrointestinal tract and blood. Blood 5-HT has been proposed to regulate hemostasis by acting as a vasoconstrictor and by triggering platelet signaling through 5-HT receptor 2A (5HTR2A). Although platelets do not synthetize 5-HT, they take 5-HT up from the blood and store it in their dense granules which are secreted upon platelet activation. Objective To identify the molecular composite of the 5-HT uptake system in platelets and elucidate the role of platelet released 5-HT in thrombosis and ischemic stroke. Methods: 5-HT transporter knockout mice (5Htt\(^{-/-}\)) were analyzed in different in vitro and in vivo assays and in a model of ischemic stroke. Results In 5Htt\(^{-/-}\) platelets, 5-HT uptake from the blood was completely abolished and agonist-induced Ca2+ influx through store operated Ca\(^{2+}\) entry (SOCE), integrin activation, degranulation and aggregation responses to glycoprotein VI (GPVI) and C-type lectin-like receptor 2 (CLEC-2) were reduced. These observed in vitro defects in 5Htt\(^{-/-}\) platelets could be normalized by the addition of exogenous 5-HT. Moreover, reduced 5-HT levels in the plasma, an increased bleeding time and the formation of unstable thrombi were observed ex vivo under flow and in vivo in the abdominal aorta and carotid artery of 5Htt\(^{-/-}\) mice. Surprisingly, in the transient middle cerebral artery occlusion (tMCAO) model of ischemic stroke 5Htt\(^{-/-}\) mice showed nearly normal infarct volume and the neurological outcome was comparable to control mice. Conclusion Although secreted platelet 5-HT does not appear to play a crucial role in the development of reperfusion injury after stroke, it is essential to amplify the second phase of platelet activation through SOCE and plays an important role in thrombus stabilization.}, language = {en} } @article{WohlgemuthMitric2016, author = {Wohlgemuth, Matthias and Mitric, Roland}, title = {Photochemical Chiral Symmetry Breaking in Alanine}, series = {Journal of Physical Chemistry A}, volume = {45}, journal = {Journal of Physical Chemistry A}, number = {120}, doi = {10.1021/acs.jpca.6b07611}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-158557}, pages = {8976-8982}, year = {2016}, abstract = {We introduce a general theoretical approach for the simulation of photochemical dynamics under the influence of circularly polarized light to explore the possibility of generating enantiomeric enrichment through polarized-light-selective photochemistry. The method is applied to the simulation of the photolysis of alanine, a prototype chiral amino acid. We show that a systematic enantiomeric enrichment can be obtained depending on the helicity of the circularly polarized light that induces the excited-state photochemistry of alanine. By analyzing the patterns of the photoinduced fragmentation of alanine we find an inducible enantiomeric enrichment up to 1.7\%, which is also in good correspondence to the experimental findings. Our method is generally applicable to complex systems and might serve to systematically explore the photochemical origin of homochirality.}, language = {en} } @article{WittmannSiebervonStengeletal.2016, author = {Wittmann, Katharina and Sieber, Cornel and von Stengel, Simon and Kohl, Matthias and Freiberger, Ellen and Jakob, Franz and Lell, Michael and Engelke, Klaus and Kemmler, Wolfgang}, title = {Impact of whole body electromyostimulation on cardiometabolic risk factors in older women with sarcopenic obesity: the randomized controlled FORMOsA-sarcopenic obesity study}, series = {Clinical Interventions in Aging}, volume = {11}, journal = {Clinical Interventions in Aging}, doi = {10.2147/CIA.S116430}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-164930}, pages = {1697—1706}, year = {2016}, abstract = {Background: Sarcopenic obesity (SO) is characterized by a combination of low muscle and high fat mass with an additive negative effect of both conditions on cardiometabolic risk. The aim of the study was to determine the effect of whole-body electromyostimulation (WB-EMS) on the metabolic syndrome (MetS) in community-dwelling women aged ≥70 years with SO. Methods: The study was conducted in an ambulatory university setting. Seventy-five community-dwelling women aged ≥70 years with SO living in Northern Bavaria, Germany, were randomly allocated to either 6 months of WB-EMS application with (WB-EMS\&P) or without (WB-EMS) dietary supplementation (150 kcal/day, 56\% protein) or a non-training control group (CG). WB-EMS included one session of 20 min (85 Hz, 350 µs, 4 s of strain-4 s of rest) per week with moderate-to-high intensity. The primary study endpoint was the MetS Z-score with the components waist circumference (WC), mean arterial pressure (MAP), triglycerides, fasting plasma glucose, and high-density lipoprotein cholesterol (HDL-C); secondary study endpoints were changes in these determining variables. Results: MetS Z-score decreased in both groups; however, changes compared with the CG were significant (P=0.001) in the WB-EMS\&P group only. On analyzing the components of the MetS, significant positive effects for both WB-EMS groups (P≤0.038) were identified for MAP, while the WB-EMS group significantly differed for WC (P=0.036), and the WB-EMS\&P group significantly differed for HDL-C (P=0.006) from the CG. No significant differences were observed between the WB-EMS groups. Conclusion: The study clearly confirms the favorable effect of WB-EMS application on the MetS in community-dwelling women aged ≥70 years with SO. However, protein-enriched supplements did not increase effects of WB-EMS alone. In summary, we considered this novel technology an effective and safe method to prevent cardiometabolic risk factors and diseases in older women unable or unwilling to exercise conventionally.}, language = {en} } @article{Winter2016, author = {Winter, Ursula}, title = {Literarisierung von Musik als Intermedialit{\"a}tsph{\"a}nomen. Exemplarische Betrachtung der oratorischen Rezeption Dantes und Goethes bei Wolf-Ferrari und Berlioz}, series = {promptus - W{\"u}rzburger Beitr{\"a}ge zur Romanistik}, volume = {2}, journal = {promptus - W{\"u}rzburger Beitr{\"a}ge zur Romanistik}, issn = {2510-2613}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-161690}, pages = {281-306}, year = {2016}, abstract = {This article deals with the reception of Dante and Goethe in Ermanno Wolf-Ferrari's and Hector Berlioz's compositions La Vita Nuova and La Damnation de Faust. Although Dante Alighieri's Vita Nova and Johann Wolfgang von Goethe's Faust belong to completely different genres and epochs, the texts provide the basis for the oratorio-style works from the Romantic era, which justifies a comparative analysis of the latter. The examined reductions, extensions, modifications and rearrangements of the texts in the libretti - which were compiled almost entirely by the composers themselves - as well as the instrumental parts and the use and functions of the orchestra, the choir and the soloists, portray the intermedia relations between literature and music in the selected compositions. The chosen examples will show that the common idea of setting literature to music and the translation studies concept of intersemiotic translation are not appropriate for all literature-based pieces of music, as the analysis of both works demonstrates that with regard to vocal music a distinction should be made between the musicalization of literature and the literarization of music.}, subject = {Musik}, language = {de} } @article{WilhelmSmetakReimeretal.2016, author = {Wilhelm, M. and Smetak, M. and Reimer, P. and Geissinger, E. and Ruediger, T. and Metzner, B. and Schmitz, N. and Engert, A. and Schaefer-Eckart, K. and Birkmann, J.}, title = {First-line therapy of peripheral T-cell lymphoma: extension and long-term follow-up of a study investigating the role of autologous stem cell transplantation}, series = {Blood Cancer Journal}, volume = {6}, journal = {Blood Cancer Journal}, doi = {10.1038/bcj.2016.63}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-164506}, pages = {e452}, year = {2016}, abstract = {Current guidelines recommend consolidation with autologous stem cell transplantation (autoSCT) after induction chemotherapy for most patients with peripheral T-cell lymphoma (PTCL). This assumption is based on five prospective phase II studies, three of which included <50 patients with limited follow-up. Here we present the final analysis of the prospective German study. The treatment regimen consisted of four to six cycles of CHOP chemotherapy followed by mobilizing therapy and stem cell collection. Patients in complete remission (CR) or partial remission (PR) underwent myeloablative chemo(radio)therapy and autoSCT. From January 2001 to July 2010, 111 patients were enrolled in the study. The main subgroups were PTCL not specified (n=42) and angioimmunoblastic T-cell lymphoma (n=37). Seventy-five (68\%) of the 111 patients received transplantation. The main reason for not receiving autoSCT was progressive disease. In an intent-to-treat analysis, the complete response rate after myeloablative therapy was 59\%. The estimated 5-year overall survival, disease-free survival and progression-free survival rates were 44\%, 54\% and 39\%, respectively. The results of this study confirm that upfront autoSCT can result in long-term remissions in patients with all major subtypes of PTCL and therefore should be part of first-line therapy whenever possible.}, language = {en} } @article{WildgruberAschenbrennerWendorffetal.2016, author = {Wildgruber, Moritz and Aschenbrenner, Teresa and Wendorff, Heiko and Czubba, Maria and Glinzer, Almut and Haller, Bernhard and Schiemann, Matthias and Zimmermann, Alexander and Berger, Hermann and Eckstein, Hans-Henning and Meier, Reinhard and Wohlgemuth, Walter A. and Libby, Peter and Zernecke, Alma}, title = {The "Intermediate" CD14\(^{++}\)CD16\(^{+}\) monocyte subset increases in severe peripheral artery disease in humans}, series = {Scientific Reports}, volume = {6}, journal = {Scientific Reports}, number = {39483}, doi = {10.1038/srep39483}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-167476}, year = {2016}, abstract = {Monocytes are key players in atherosclerotic. Human monocytes display a considerable heterogeneity and at least three subsets can be distinguished. While the role of monocyte subset heterogeneity has already been well investigated in coronary artery disease (CAD), the knowledge about monocytes and their heterogeneity in peripheral artery occlusive disease (PAOD) still is limited. Therefore, we aimed to investigate monocyte subset heterogeneity in patients with PAOD. Peripheral blood was obtained from 143 patients suffering from PAOD (Rutherford stage I to VI) and three monocyte subsets were identified by flow cytometry: CD14\(^{++}\)CD16\(^{-}\) classical monocytes, CD14\(^{+}\)CD16\(^{++}\) non-classical monocytes and CD14\(^{++}\)CD16\(^{+}\) intermediate monocytes. Additionally the expression of distinct surface markers (CD106, CD162 and myeloperoxidase MPO) was analyzed. Proportions of CD14\(^{++}\)CD16\(^{+}\) intermediate monocyte levels were significantly increased in advanced stages of PAOD, while classical and non-classical monocytes displayed no such trend. Moreover, CD162 and MPO expression increased significantly in intermediate monocyte subsets in advanced disease stages. Likewise, increased CD162 and MPO expression was noted in CD14\(^{++}\)CD16\(^{-}\) classical monocytes. These data suggest substantial dynamics in monocyte subset distributions and phenotypes in different stages of PAOD, which can either serve as biomarkers or as potential therapeutic targets to decrease the inflammatory burden in advanced stages of atherosclerosis.}, language = {en} } @article{WieserReichertsJuravleetal.2016, author = {Wieser, Matthias J. and Reicherts, Philipp and Juravle, Georgiana and von Leupoldt, Andreas}, title = {Attention mechanisms during predictable and unpredictable threat - a steady-state visual evoked potential approach}, series = {NeuroImage}, volume = {139}, journal = {NeuroImage}, doi = {10.1016/j.neuroimage.2016.06.026}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-187365}, pages = {167-175}, year = {2016}, abstract = {Fear is elicited by imminent threat and leads to phasic fear responses with selective attention, whereas anxiety is characterized by a sustained state of heightened vigilance due to uncertain danger. In the present study, we investigated attention mechanisms in fear and anxiety by adapting the NPU-threat test to measure steady-state visual evoked potentials (ssVEPs). We investigated ssVEPs across no aversive events (N), predictable aversive events (P), and unpredictable aversive events (U), signaled by four-object arrays (30 s). In addition, central cues were presented during all conditions but predictably signaled imminent threat only during the P condition. Importantly, cues and context events were flickered at different frequencies (15 Hz vs. 20 Hz) in order to disentangle respective electrocortical responses. The onset of the context elicited larger electrocortical responses for U compared to P context. Conversely, P cues elicited larger electrocortical responses compared to N cues. Interestingly, during the presence of the P cue, visuocortical processing of the concurrent context was also enhanced. The results support the notion of enhanced initial hypervigilance to unpredictable compared to predictable threat contexts, while predictable cues show electrocortical enhancement of the cues themselves but additionally a boost of context processing.}, language = {en} } @phdthesis{Wiegner2016, author = {Wiegner, Armin}, title = {Auswirkungen der gepaarten Stimulation des H{\"o}rnerven und des Nervus vagus auf die spektrale Plastizit{\"a}t im auditorischen Kortex der mongolischen W{\"u}stenrennmaus}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-135887}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2016}, abstract = {Das Cochlea-Implantat (CI) erm{\"o}glichte bereits >300 000 hochgradig h{\"o}rgesch{\"a}digten Menschen weltweit eine grunds{\"a}tzlich wiederhergestellte H{\"o}rfunktion. Es wird angenommen, dass sich das Sprachverst{\"a}ndnis von CI-Tr{\"a}gern verbessert, wenn die funktionale Trennung der CI-Kan{\"a}le erh{\"o}ht wird. Neben verschiedenen auf die auditorische Peripherie beschr{\"a}nkten Ans{\"a}tzen gibt es {\"U}berlegungen, eine verbesserte Kanaltrennung durch die Rehabilitation taubheitsinduzierter Degenerationen in der spektralen Verarbeitung im zentralen auditorischen System zu erreichen. Es konnte in ertaubten Tieren bislang allerdings kein ad{\"a}quates CI-Stimulationsmuster beschrieben werden, dass es erlaubte, eine gezielte neuronale Plastizit{\"a}t in der spektralen Verarbeitung zu induzieren. Die Arbeitsgruppe um M.P. Kilgard (UT Dallas, USA) zeigte in mehreren Studien in h{\"o}renden Tieren, dass auditorische Stimulation gepaart mit elektrischer Vagusnerv-Stimulation (VNS) zu einer gezielten kortikalen Plastizit{\"a}t f{\"u}hrt. Diese gepaarte Stimulation konnte die spektrale Verarbeitung von Signalen im auditorischen Kortex (AC) gezielt beeinflussen und so z.B. pathologisch verbreiterte Repr{\"a}sentationen von T{\"o}nen wieder verfeinern. Dieses hochgradige Potential f{\"u}r gezielte Plastizit{\"a}t im AC durch die gepaarte VNS scheint eine vielversprechende L{\"o}sung darzustellen, um die durch verbreiterte Repr{\"a}sentation im ertaubten AC verminderte CI-Kanaltrennung zu verbessern. Vor diesem Hintergrund sollte in der vorliegenden Promotion die {\"U}bertragbarkeit dieses hochgradigen Potentials auf das ertaubte und CI-stimulierte auditorische System evaluiert werden. Um die CI-Kanaltrennung zu untersuchen, wurde ein Multikanal-CI f{\"u}r die Mongolische W{\"u}stenrennmaus (Gerbil) entwickelt. Trotz der kleinen Ausmaße von Cochlea und AC im Gerbil und der generell breiten neuronalen Erregung durch intracochle{\"a}re elektrische Stimulation konnte eine tonotop organisierte und selektive Repr{\"a}sentation der neuronalen Antworten f{\"u}r mehrere CI-Kan{\"a}le im AC nachgewiesen werden. F{\"u}r die gepaarte CI/VN-Stimulation wurden die Tiere zus{\"a}tzlich mit einer Manschettenelektrode um den linken zervikalen Nervus vagus (VN) implantiert. Die chronischen Implantate erlaubten {\"u}ber mehrere Wochen hinweg eine stabile und zuverl{\"a}ssige elektrische Stimulation im frei-beweglichen Gerbil. Damit kombiniert das in dieser Promotion entwickelte Multikanal-CI-VNS-Modell die Vorteile einer tonotop selektiven und stabilen neuronalen Aktivierung mit den ethischen, kostenrelevanten und entwicklungsbezogenen Vorteilen, die der Einsatz von Kleinnagern bietet. Als n{\"a}chster Schritt wurde das grunds{\"a}tzliche Potential der gepaarten CI/VN-Stimulation f{\"u}r gezielte plastische Ver{\"a}nderungen im AC des Gerbils getestet. Engineer et al. (2011) hatten bereits in akustischen Studien in h{\"o}renden Ratten die kortikale {\"U}berrepr{\"a}sentation eines einzelnen chronisch mit VNS gepaarten Tones gezeigt. In der vorliegenden Promotion wurde versucht, die Ergebnisse aus der akustischen Studie in h{\"o}renden Ratten in zwei verschiedenen Studien im Gerbil zu reproduzieren. Analog zur gepaarten Ton/VN-Stimulation in der Ratte untersuchten wir zuerst in ertaubten Gerbils die Auswirkungen einkanaliger CI-Stimulation gepaart mit VNS. Im AC des Gerbils konnten keine Ver{\"a}nderung der zentralen Repr{\"a}sentation des VNS gepaarten CI-Kanals festgestellt werden. Um speziesspezifische (Ratte vs. Gerbil) und stimulusspezifische (akustisch vs. elektrisch) Unterschiede zwischen den Studien als m{\"o}gliche Gr{\"u}nde f{\"u}r das Ausbleiben der VNS induzierten Plastizit{\"a}t auszuschließen, wurde nun die gepaarte Ton/VN-Stimulation (Engineer et al., 2011) im h{\"o}renden Gerbil wiederholt. Eine kortikale {\"U}berrepr{\"a}sentation des VNS gepaarten Signals konnte aber auch im h{\"o}renden Gerbil nicht reproduziert werden. M{\"o}gliche Gr{\"u}nde f{\"u}r die Diskrepanz zwischen unseren Ergebnissen im Gerbil und den publizierten Ergebnissen in der Ratte werden diskutiert. Die generelle Funktionsf{\"a}higkeit der VNS in den chronisch stimulierten Tieren wurde durch die Ableitung VNS evozierter Potentiale (VNEP) kontrolliert. Ein speziesspezifischer Unterschied erscheint bei der biologischen N{\"a}he von Ratte und mongolischer W{\"u}stenrennmaus unwahrscheinlich, kann allerdings durch die vorliegenden Studien nicht vollst{\"a}ndig ausgeschlossen werden. Eine Abh{\"a}ngigkeit des plastischen Potentials der gepaarten VNS von der Stimulationsintensit{\"a}t ist bekannt. Da Ratten und Gerbils {\"a}hnliche VNEP-Schwellen zeigten und mit identischen VNS-Amplituden stimuliert wurden, gehen wir davon aus, dass Unterschiede im plastischen Potential gepaarter VNS zwischen beiden Spezies nicht auf die verwendete Stimulationsintensit{\"a}t zur{\"u}ckzuf{\"u}hren sind. Die beschriebene Diskrepanz im Potential f{\"u}r kortikale Plastizit{\"a}t durch gepaarte VNS weckt Zweifel an der {\"U}bertragbarkeit des f{\"u}r die Ratte publizierten Potentials auf andere Spezies, einschließlich des Menschen.}, subject = {H{\"o}rrinde}, language = {de} } @article{WiedenmannBocquillonDeaconetal.2016, author = {Wiedenmann, J. and Bocquillon, E. and Deacon, R.S. and Hartinger, S. and Herrmann, O. and Klapwijk, T.M. and Maier, L. and Ames, C. and Br{\"u}ne, C. and Gould, C. and Oiwa, A. and Ishibashi, K. and Tarucha, S. and Buhmann, H. and Molenkamp, L.W.}, title = {4π-periodic Josephson supercurrent in HgTe-based topological Josephson junctions}, series = {Nature Communications}, volume = {7}, journal = {Nature Communications}, doi = {10.1038/ncomms10303}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-175353}, year = {2016}, abstract = {The Josephson effect describes the generic appearance of a supercurrent in a weak link between two superconductors. Its exact physical nature deeply influences the properties of the supercurrent. In recent years, considerable efforts have focused on the coupling of superconductors to the surface states of a three-dimensional topological insulator. In such a material, an unconventional induced p-wave superconductivity should occur, with a doublet of topologically protected gapless Andreev bound states, whose energies vary 4π-periodically with the superconducting phase difference across the junction. In this article, we report the observation of an anomalous response to rf irradiation in a Josephson junction made of a HgTe weak link. The response is understood as due to a 4π-periodic contribution to the supercurrent, and its amplitude is compatible with the expected contribution of a gapless Andreev doublet. Our work opens the way to more elaborate experiments to investigate the induced superconductivity in a three-dimensional insulator.}, language = {en} } @phdthesis{Wiebusch2016, author = {Wiebusch, Dennis}, title = {Reusability for Intelligent Realtime Interactive Systems}, publisher = {W{\"u}rzburg University Press}, address = {W{\"u}rzburg}, isbn = {978-3-95826-040-5 (print)}, doi = {10.25972/WUP-978-3-95826-041-2}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-121869}, school = {W{\"u}rzburg University Press}, pages = {260}, year = {2016}, abstract = {Software frameworks for Realtime Interactive Systems (RIS), e.g., in the areas of Virtual, Augmented, and Mixed Reality (VR, AR, and MR) or computer games, facilitate a multitude of functionalities by coupling diverse software modules. In this context, no uniform methodology for coupling these modules does exist; instead various purpose-built solutions have been proposed. As a consequence, important software qualities, such as maintainability, reusability, and adaptability, are impeded. Many modern systems provide additional support for the integration of Artificial Intelligence (AI) methods to create so called intelligent virtual environments. These methods exacerbate the above-mentioned problem of coupling software modules in the thus created Intelligent Realtime Interactive Systems (IRIS) even more. This, on the one hand, is due to the commonly applied specialized data structures and asynchronous execution schemes, and the requirement for high consistency regarding content-wise coupled but functionally decoupled forms of data representation on the other. This work proposes an approach to decoupling software modules in IRIS, which is based on the abstraction of architecture elements using a semantic Knowledge Representation Layer (KRL). The layer facilitates decoupling the required modules, provides a means for ensuring interface compatibility and consistency, and in the end constitutes an interface for symbolic AI methods.}, subject = {Virtuelle Realit{\"a}t}, language = {en} } @article{WidmannArtingerBiesingeretal.2016, author = {Widmann, Annekathrin and Artinger, Marc and Biesinger, Lukas and Boepple, Kathrin and Peters, Christina and Schlechter, Jana and Selcho, Mareike and Thum, Andreas S.}, title = {Genetic Dissection of Aversive Associative Olfactory Learning and Memory in Drosophila Larvae}, series = {PLoS Genetics}, volume = {12}, journal = {PLoS Genetics}, number = {10}, doi = {10.1371/journal.pgen.1006378}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-166672}, pages = {e1006378}, year = {2016}, abstract = {Memory formation is a highly complex and dynamic process. It consists of different phases, which depend on various neuronal and molecular mechanisms. In adult Drosophila it was shown that memory formation after aversive Pavlovian conditioning includes—besides other forms—a labile short-term component that consolidates within hours to a longer-lasting memory. Accordingly, memory formation requires the timely controlled action of different neuronal circuits, neurotransmitters, neuromodulators and molecules that were initially identified by classical forward genetic approaches. Compared to adult Drosophila, memory formation was only sporadically analyzed at its larval stage. Here we deconstruct the larval mnemonic organization after aversive olfactory conditioning. We show that after odor-high salt conditioning larvae form two parallel memory phases; a short lasting component that depends on cyclic adenosine 3'5'-monophosphate (cAMP) signaling and synapsin gene function. In addition, we show for the first time for Drosophila larvae an anesthesia resistant component, which relies on radish and bruchpilot gene function, protein kinase C activity, requires presynaptic output of mushroom body Kenyon cells and dopamine function. Given the numerical simplicity of the larval nervous system this work offers a unique prospect for studying memory formation of defined specifications, at full-brain scope with single-cell, and single-synapse resolution.}, language = {en} } @article{WhiteWiederholdLoeffleretal.2016, author = {White, P. Lewis and Wiederhold, Nathan P. and Loeffler, Juergen and Najvar, Laura K. and Melchers, Willem and Herrera, Monica and Bretagne, Stephane and Wickes, Brian and Kirkpatrick, William R. and Barnes, Rosemary A. and Donnelly, J. Peter and Patterson, Thomas F.}, title = {Comparison of nonculture blood-based tests for diagnosing invasive aspergillosis in an animal model}, series = {Journal of Clinical Microbiology}, volume = {54}, journal = {Journal of Clinical Microbiology}, number = {4}, doi = {10.1128/JCM.03233-15}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-189674}, pages = {960-966}, year = {2016}, abstract = {The European Aspergillus PCR Initiative (EAPCRI) has provided recommendations for the PCR testing of whole blood (WB) and serum/plasma. It is important to test these recommended protocols on nonsimulated "in vivo" specimens before full clinical evaluation. The testing of an animal model of invasive aspergillosis (IA) overcomes the low incidence of disease and provides experimental design and control that is not possible in the clinical setting. Inadequate performance of the recommended protocols at this stage would require reassessment of methods before clinical trials are performed and utility assessed. The manuscript describes the performance of EAPCRI protocols in an animal model of invasive aspergillosis. Blood samples taken from a guinea pig model of IA were used for WB and serum PCR. Galactomannan and beta-D-glucan detection were evaluated, with particular focus on the timing of positivity and on the interpretation of combination testing. The overall sensitivities for WB PCR, serum PCR, galactomannan, and beta-D-glucan were 73\%, 65\%, 68\%, and 46\%, respectively. The corresponding specificities were 92\%, 79\%, 80\%, and 100\%, respectively. PCR provided the earliest indicator of IA, and increasing galactomannan and beta-D-glucan values were indicators of disease progression. The combination of WB PCR with galactomannan and beta-D-glucan proved optimal (area under the curve AUC], 0.95), and IA was confidently diagnosed or excluded. The EAPRCI-recommended PCR protocols provide performance comparable to commercial antigen tests, and clinical trials are warranted. By combining multiple tests, IA can be excluded or confirmed, highlighting the need for a combined diagnostic strategy. However, this approach must be balanced against the practicality and cost of using multiple tests.}, language = {en} } @article{WheelerBarquistKingsleyetal.2016, author = {Wheeler, Nicole E. and Barquist, Lars and Kingsley, Robert A. and Gardner, Paul P.}, title = {A profile-based method for identifying functional divergence of orthologous genes in bacterial genomes}, series = {Bioinformatics}, volume = {32}, journal = {Bioinformatics}, number = {23}, doi = {10.1093/bioinformatics/btw518}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-186502}, pages = {3566-3574}, year = {2016}, abstract = {Motivation: Next generation sequencing technologies have provided us with a wealth of information on genetic variation, but predi cting the functional significance of this variation is a difficult task. While many comparative genomics studies have focused on gene flux and large scale changes, relatively little attention has been paid to quantifying the effects of single nucleotide polymorphisms and indels on protein function, particularly in bacterial genomics. Results: We present a hidden Markov model based approach we call delta-bitscore (DBS) for identifying orthologous proteins that have diverged at the amino acid sequence level in a way that is likely to impact biological function. We benchmark this approach with several widely used datasets and apply it to a proof-of-concept study of orthologous proteomes in an investigation of host adaptation in Salmonella enterica. We highlight the value of the method in identifying functional divergence of genes, and suggest that this tool may be a better approach than the commonly used dN/dS metric for identifying functionally significant genetic changes occurring in recently diverged organisms.}, language = {en} } @article{WestermaierLinsenmannHomolaetal.2016, author = {Westermaier, Thomas and Linsenmann, Thomas and Homola, Gy{\"o}rgy A. and Loehr, Mario and Stetter, Christian and Willner, Nadine and Ernestus, Ralf-Ingo and Soymosi, Laszlo and Vince, Giles H.}, title = {3D rotational fluoroscopy for intraoperative clip control in patients with intracranial aneurysms - assessment of feasibility and image quality}, series = {BMC Medical Imaging}, volume = {16}, journal = {BMC Medical Imaging}, number = {30}, doi = {10.1186/s12880-016-0133-0}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-146381}, year = {2016}, abstract = {Background Mobile 3D fluoroscopes have become increasingly available in neurosurgical operating rooms. In this series, the image quality and value of intraoperative 3D fluoroscopy with intravenous contrast agent for the evaluation of aneurysm occlusion and vessel patency after clip placement was assessed in patients who underwent surgery for intracranial aneurysms. Materials and methods Twelve patients were included in this retrospective analysis. Prior to surgery, a 360° rotational fluoroscopy scan was performed without contrast agent followed by another scan with 50 ml of intravenous iodine contrast agent. The image files of both scans were transferred to an Apple PowerMac® workstation, subtracted and reconstructed using OsiriX® free software. The procedure was repeated after clip placement. Both image sets were compared for assessment of aneurysm occlusion and vessel patency. Results Image acquisition and contrast administration caused no adverse effects. Image quality was sufficient to follow the patency of the vessels distal to the clip. Metal artifacts reduce the assessability of the immediate vicinity of the clip. Precise image subtraction and post-processing can reduce metal artifacts and make the clip-site assessable and depict larger neck-remnants. Conclusion This technique quickly supplies images at adequate quality to evaluate distal vessel patency after aneurysm clipping. Significant aneurysm remnants may be depicted as well. As it does not require visual control of all vessels that are supposed to be evaluated intraoperatively, this technique may be complementary to other intraoperative tools like indocyanine green videoangiography and micro-Doppler, especially for the assessment of larger aneurysms. At the momentary state of this technology, it cannot replace postoperative conventional angiography. However, 3D fluoroscopy and image post-processing are young technologies. Further technical developments are likely to result in improved image quality.}, language = {en} } @article{WernerBeykanHiguchietal.2016, author = {Werner, Rudolf A. and Beykan, Seval and Higuchi, Takahiro and L{\"u}ckerath, Katharina and Weich, Alexander and Scheurlen, Michael and Bluemel, Christina and Herrmann, Ken and Buck, Andreas K. and Lassmann, Michael and Lapa, Constantin and H{\"a}nscheid, Heribert}, title = {The impact of \(^{177}\)Lu-octreotide therapy on \(^{99m}\)Tc-MAG3 clearance is not predictive for late nephropathy}, series = {Oncotarget}, volume = {7}, journal = {Oncotarget}, number = {27}, doi = {10.18632/oncotarget.9775}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-177318}, pages = {41233-41241}, year = {2016}, abstract = {Peptide Receptor Radionuclide Therapy (PRRT) for the treatment of neuroendocrine tumors may lead to kidney deterioration. This study aimed to evaluate the suitability of \(^{99m}\)Tc-mercaptoacetyltriglycine (\(^{99m}\)Tc-MAG3) clearance for the early detection of PRRT-induced changes on tubular extraction (TE). TE rate (TER) was measured prior to 128 PRRT cycles (7.6±0.4 GBq \(^{177}\)Lu-octreotate/octreotide each) in 32 patients. TER reduction during PRRT was corrected for age-related decrease and analyzed for the potential to predict loss of glomerular filtration (GF). The GF rate (GFR) as measure for renal function was derived from serum creatinine. The mean TER was 234 ± 53 ml/min/1.73 m² before PRRT (baseline) and 221 ± 45 ml/min/1.73 m² after a median follow-up of 370 days. The age-corrected decrease (mean: -3\%, range: -27\% to +19\%) did not reach significance (p=0.09) but significantly correlated with the baseline TER (Spearman p=-0.62, p<0.001). Patients with low baseline TER showed an improved TER after PRRT, high decreases were only observed in individuals with high baseline TER. Pre-therapeutic TER data were inferior to plasma creatinine-derived GFR estimates in predicting late nephropathy. TER assessed by \(^{99m}\)Tc-MAG3­clearance prior to and during PRRT is not suitable as early predictor of renal injury and an increased risk for late nephropathy.}, language = {en} } @article{WernerLueckerathSchmidetal.2016, author = {Werner, R. A. and L{\"u}ckerath, K. and Schmid, J. S. and Higuchi, T. and Kreissl, M. C. and Grelle, I. and Reiners, C. and Buck, A. K. and Lapa, C.}, title = {Thyroglobulin fluctuations in patients with iodine-refractory differentiated thyroid carcinoma on lenvatinib treatment - initial experience}, series = {Scientific Reports}, volume = {6}, journal = {Scientific Reports}, doi = {10.1038/srep28081}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-147407}, pages = {28081}, year = {2016}, abstract = {Tyrosine kinase inhibitors (TKI) have shown clinical effectiveness in iodine-refractory differentiated thyroid cancer (DTC). The corresponding role of serum thyroglobulin (Tg) in iodine-refractory DTC has not been investigated yet. 9 patients (3 female, 61 ± 8y) with progressive iodine-refractory DTC starting on lenvatinib were considered. Tumor restaging was performed every 2-3 months including contrast-enhanced computed tomography (CT, RECIST 1.1). Serum Tg was measured and compared to imaging findings. After treatment initiation, serum Tg levels dropped in all patients with a median reduction of 86.2\%. During long-term follow-up (median, 25.2 months), fluctuations in Tg could be observed in 8/9 subjects. According to RECIST, 6/9 subjects achieved a partial response or stable disease with the remaining 3/9 experiencing progressive disease (2/3 with Tg levels rising above baseline). All of the patients with disease progression presented with a preceding continuous rise in serum Tg, whereas tumor marker oscillations in the subjects with controlled disease were only intermittent. Initiation of lenvatinib in iodine-refractory DTC patients is associated with a significant reduction in serum Tg levels as a marker of treatment response. In the course of treatment, transient Tg oscillations are a frequent phenomenon that may not necessarily reflect morphologic tumor progression.}, language = {en} } @article{WernerKojonazarovGassneretal.2016, author = {Werner, Franziska and Kojonazarov, Baktybek and Gaßner, Birgit and Abeßer, Marco and Schuh, Kai and V{\"o}lker, Katharina and Baba, Hideo A. and Dahal, Bhola K. and Schermuly, Ralph T. and Kuhn, Michaela}, title = {Endothelial actions of atrial natriuretic peptide prevent pulmonary hypertension in mice}, series = {Basic Research in Cardiology}, volume = {111}, journal = {Basic Research in Cardiology}, number = {2}, doi = {10.1007/s00395-016-0541-x}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-190664}, pages = {16}, year = {2016}, abstract = {The cardiac hormone atrial natriuretic peptide (ANP) regulates systemic and pulmonary arterial blood pressure by activation of its cyclic GMP-producing guanylyl cyclase-A (GC-A) receptor. In the lung, these hypotensive effects were mainly attributed to smooth muscle-mediated vasodilatation. It is unknown whether pulmonary endothelial cells participate in the homeostatic actions of ANP. Therefore, we analyzed GC-A/cGMP signalling in lung endothelial cells and the cause and functional impact of lung endothelial GC-A dysfunction. Western blot and cGMP determinations showed that cultured human and murine pulmonary endothelial cells exhibit prominent GC-A expression and activity which were markedly blunted by hypoxia, a condition known to trigger pulmonary hypertension (PH). To elucidate the consequences of impaired endothelial ANP signalling, we studied mice with genetic endothelial cell-restricted ablation of the GC-A receptor (EC GC-A KO). Notably, EC GC-A KO mice exhibit PH already under resting, normoxic conditions, with enhanced muscularization of small arteries and perivascular infiltration of inflammatory cells. These alterations were aggravated on exposure of mice to chronic hypoxia. Lung endothelial GC-A dysfunction was associated with enhanced expression of angiotensin converting enzyme (ACE) and increased pulmonary levels of Angiotensin II. Angiotensin II/AT(1)-blockade with losartan reversed pulmonary vascular remodelling and perivascular inflammation of EC GC-A KO mice, and prevented their increment by chronic hypoxia. This experimental study indicates that endothelial effects of ANP are critical to prevent pulmonary vascular remodelling and PH. Chronic endothelial ANP/GC-A dysfunction, e.g. provoked by hypoxia, is associated with activation of the ACE-angiotensin pathway in the lung and PH.}, language = {en} } @article{WenteSchroederBuckardetal.2016, author = {Wente, Sarah and Schr{\"o}der, Simone and Buckard, Johannes and B{\"u}ttel, Hans-Martin and von Deimling, Florian and Diener, Wilfried and H{\"a}ussler, Martin and H{\"u}bschle, Susanne and Kinder, Silvia and Kurlemann, Gerhard and Kretzschmar, Christoph and Lingen, Michael and Maroske, Wiebke and Mundt, Dirk and S{\´a}nchez-Albisua, Iciar and Seeger, J{\"u}rgen and Toelle, Sandra P. and Boltshauser, Eugen and Brockmann, Knut}, title = {Nosological delineation of congenital ocular motor apraxia type Cogan: an observational study}, series = {Orphanet Journal of Rare Diseases}, volume = {11}, journal = {Orphanet Journal of Rare Diseases}, number = {104}, doi = {10.1186/s13023-016-0486-z}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-166534}, year = {2016}, abstract = {Background The nosological assignment of congenital ocular motor apraxia type Cogan (COMA) is still controversial. While regarded as a distinct entity by some authorities including the Online Mendelian Inheritance in Man catalog of genetic disorders, others consider COMA merely a clinical symptom. Methods We performed a retrospective multicenter data collection study with re-evaluation of clinical and neuroimaging data of 21 previously unreported patients (8 female, 13 male, ages ranging from 2 to 24 years) diagnosed as having COMA. Results Ocular motor apraxia (OMA) was recognized during the first year of life and confined to horizontal pursuit in all patients. OMA attenuated over the years in most cases, regressed completely in two siblings, and persisted unimproved in one individual. Accompanying clinical features included early onset ataxia in most patients and cognitive impairment with learning disability (n = 6) or intellectual disability (n = 4). Re-evaluation of MRI data sets revealed a hitherto unrecognized molar tooth sign diagnostic for Joubert syndrome in 11 patients, neuroimaging features of Poretti-Boltshauser syndrome in one case and cerebral malformation suspicious of a tubulinopathy in another subject. In the remainder, MRI showed vermian hypo-/dysplasia in 4 and no abnormalities in another 4 patients. There was a strong trend to more severe cognitive impairment in patients with Joubert syndrome compared to those with inconclusive MRI, but otherwise no significant difference in clinical phenotypes between these two groups. Conclusions Systematical renewed analysis of neuroimaging data resulted in a diagnostic reappraisal in the majority of patients with early-onset OMA in the cohort reported here. This finding poses a further challenge to the notion of COMA constituting a separate entity and underlines the need for an expert assessment of neuroimaging in children with COMA, especially if they show cognitive impairment.}, language = {en} } @phdthesis{Wennemann2016, author = {Wennemann, Benedikt}, title = {Untersuchungen zur Synthese und Reaktivit{\"a}t von {\"U}bergangsmetallborylenkomplexen der Gruppe 8}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-130755}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2016}, abstract = {Zusammenfassung Die vorliegende Arbeit wurde in drei Teilbereiche untergliedert. Der erste Teil besch{\"a}ftigte sich mit der Untersuchung des anionischen Systems K[(OC)3M(PMe3)(SiR3)] (M = Fe, Ru, Os; R = Me, Et, Ph) und dessen Reaktivit{\"a}t gegen{\"u}ber Dihalogenboranen. Der zweite Teil widmete sich der Untersuchung der Reaktiv{\"a}t des Eisenbis(borylen)komplexes 45 gegen{\"u}ber verschiedenen Lewis-Basen und Lewis-S{\"a}uren. Im letzten Teil der Arbeit wurde die Insertion von Metallfragmenten der {\"U}bergangsmetalle der Gruppe 8 in die M=B-Doppelbindung des Borylenkomplexes 28 untersucht. Durch Umsetzungen der anionischen Osmiumverbindung 64 mit Cl2BDur und Br2BDur konnten die Borylkomplexe 67 und 68 erhalten werden (SCHEMA 56). Die Untersuchungen zum sterischen Einfluss des Silylsubstituenten zeigten, dass die Osmiumkomplexe 65 und 66 mit SiEt3- bzw. SiPh3-Substituenten in die entsprechenden Borylkomplexe {\"u}berf{\"u}hrt werden k{\"o}nnen, wobei diese Spezies nicht analysenrein isoliert werden konnten. Der Borylkomplex 68 konnte nachfolgend weder unter thermischen Bedingungen, noch unter Verwendung der Lewis-Base Pyridin bzw. des Halogenabstraktionsmittels Na[BArCl4] in einen terminalen Osmiumborylenkomplex umgewandelt werden (Schema 57). Anf{\"a}ngliche Studien zur Reaktivit{\"a}t der anionischen Rutheniumverbindungen 81-83 gegen{\"u}ber Dihalogenboranen haben sich auf den sterischen Einfluss der borgebundenen Arylsubstituenten konzentriert. Hierdurch konnte gezeigt werden, dass eine Ph-Substitution keine ausreichende Stabilisierung der entstehenden Borylkomplexe liefert. Im Gegensatz dazu erwies sich der sterische Anspruch von Duryl- und Mesitylsubsituenten als ideal f{\"u}r die Bildung stabiler Borylkomplexe, wohingegen die sterische {\"U}berfrachtung der Supermesityl- und Terphenylsubstituenten eine Salzeliminierungsreaktion von vornherein verhindert. Der Einfluss des Halogensubstituenten in X2BDur (X = Cl, Br) wurde anhand der Reaktivit{\"a}t gegen{\"u}ber 81 n{\"a}her untersucht. In beiden F{\"a}llen konnten die entsprechenden Borylkomplexe 84 und 85 isoliert und charakterisiert werden. Da bei der Umsetzung mit Br2BDur auch noch weitere Produkte zu erkennen waren, wurde der sterische Einfluss des Silylsubstituenten in 82 und 83 auf die Produktverteilung bei Reaktion mit Br2BDur untersucht. Es hat sich gezeigt, dass die Wahl der Reaktionsbedingungen einen starken Einfluss auf den Reaktionsverlauf aus{\"u}bt. So konnte durch regelm{\"a}ßiges Entgasen der Reaktionsl{\"o}sung der Rutheniumborylenkomplex 86 erhalten werden, w{\"a}hrend eine thermische Reaktionsf{\"u}hrung unter CO-Atmosph{\"a}re selektiv zu einer Silylboraneliminierung f{\"u}hrte, dessen Produkt indirekt {\"u}ber die Bildung von [(OC)4Ru(PMe3)] (75) nachgewiesen werden konnte (Schema 59). W{\"a}hrend die Umsetzung der analogen Eisenspezies K[(OC)3Fe(PMe3)(SiEt3)] (92) mit Cl2BDur lediglich zu Zersetzung f{\"u}hrte, konnte im Verlauf der Reaktion mit Br2BDur eine neue, sehr interessante Reaktivit{\"a}t beobachtet werden. Hier war die Salzeliminierungsreaktion mit einer Alkylboraneliminierung verbunden, wobei der intermedi{\"a}r entstehende Silylenkomplex (95) in situ zum dinuklearen, zweifach-verbr{\"u}ckten Bis(silylen)komplex 94 dimerisierte (SCHEMA 60). Unter photolytischen Bedingungen konnte 94 weiter in den dreifach-verbr{\"u}ckten Bis(silylen)komplex 96 {\"u}berf{\"u}hrt werden, welcher den ersten strukturell charaktersierten Komplex dieser Art darstellt. In SCHEMA 61 sind alle relevanten Reaktivit{\"a}ten des Systems K[(OC)3M(PMe3)(SiR3)] gegen{\"u}ber X2BDur (X = Cl, Br) zusammen mit den Ergebnissen vorangegangener Arbeiten in einer {\"U}bersicht dargestellt. Der zweite Teil dieser Arbeit besch{\"a}ftigte sich mit der Reaktivit{\"a}t des Eisenbis(borylen)komplexes [(OC)3Fe(=BDur){=BN(SiMe3)2}] (45). Zun{\"a}chst wurde 45 mit verschiedenen Lewis-Basen umgesetzt. W{\"a}hrend die Umsetzungen mit verschiedenen NHCs (IMe, IMes, IDipp) nur zu Zersetzung f{\"u}hrte, konnte durch die Reaktion mit cAACMe der außergew{\"o}hnliche Komplex 98 isoliert und vollst{\"a}ndig charakterisiert werden (SCHEMA 62). Dieser stellt das erste Beispiel f{\"u}r eine intramolekulare Spaltung eines Carbonylliganden in einem einkernigen Komplex dar. Anschließend wurde die Reaktivit{\"a}t von 45 gegen{\"u}ber den Lewis-S{\"a}uren BBr3, AlBr3 und GaBr3 untersucht. W{\"a}hrend die Umsetzung von 45 mit AlBr3 lediglich zu Zersetzung f{\"u}hrte, konnte mit GaBr3 als Hauptprodukt Br2BDur nachgewiesen werden. In einem m{\"o}glichen Reaktionsmechanismus ist die Reaktion mit einer 1,2-Addition des GaBr3 unter Bildung eines Gallylkomplexes verbunden, welcher nach Abspaltung von Br2BDur in einen instabilen Gallylenkomplex {\"u}bergeht (SCHEMA 63). Die Umsetzung von 45 mit BBr3 lieferte bei tiefen Temperaturen den zweikernigen Tris(borylen)komplex 100 (SCHEMA 64), welcher ein Analogon des wohlbekannten Fe2(CO)9 darstellt. Das abschließende Kapitel dieser Arbeit befasste sich mit der Insertion von Metallfragmenten der Gruppe 8-{\"U}bergangsmetalle in die M=B-Doppelbindung von [(OC)5Mo=BN(SiMe3)2] (28). W{\"a}hrend bei den Umsetzungen von 28 mit [(OC)4Fe(PMe3)] (90) und [(OC)4Ru(PMe3)] (75) die MOLPs 104 und 105 nur NMR-spektroskopisch nachgewiesen werden konnten, war die Isolierung des MOLPs 103 sowie dessen strukturelle Charakterisierung m{\"o}glich (SCHEMA 65). Bemerkenswert ist hierbei, dass die Reaktion sowohl unter thermischen als auch unter photolytischen Bedingungen durchgef{\"u}hrt werden kann.}, subject = {Borylgruppe}, language = {de} } @article{WeisschuhMayerStrometal.2016, author = {Weisschuh, Nicole and Mayer, Anja K. and Strom, Tim M. and Kohl, Susanne and Gl{\"o}ckle, Nicola and Schubach, Max and Andreasson, Sten and Bernd, Antje and Birch, David G. and Hamel, Christian P. and Heckenlively, John R. and Jacobson, Samuel G. and Kamme, Christina and Kellner, Ulrich and Kunstmann, Erdmute and Maffei, Pietro and Reiff, Charlotte M. and Rohrschneider, Klaus and Rosenberg, Thomas and Rudolph, G{\"u}nther and V{\´a}mos, Rita and Vars{\´a}nyi, Bal{\´a}zs and Weleber, Richard G. and Wissinger, Bernd}, title = {Mutation Detection in Patients with Retinal Dystrophies Using Targeted Next Generation Sequencing}, series = {PLoS ONE}, volume = {11}, journal = {PLoS ONE}, number = {1}, doi = {10.1371/journal.pone.0145951}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-167398}, pages = {e0145951}, year = {2016}, abstract = {Retinal dystrophies (RD) constitute a group of blinding diseases that are characterized by clinical variability and pronounced genetic heterogeneity. The different nonsyndromic and syndromic forms of RD can be attributed to mutations in more than 200 genes. Consequently, next generation sequencing (NGS) technologies are among the most promising approaches to identify mutations in RD. We screened a large cohort of patients comprising 89 independent cases and families with various subforms of RD applying different NGS platforms. While mutation screening in 50 cases was performed using a RD gene capture panel, 47 cases were analyzed using whole exome sequencing. One family was analyzed using whole genome sequencing. A detection rate of 61\% was achieved including mutations in 34 known and two novel RD genes. A total of 69 distinct mutations were identified, including 39 novel mutations. Notably, genetic findings in several families were not consistent with the initial clinical diagnosis. Clinical reassessment resulted in refinement of the clinical diagnosis in some of these families and confirmed the broad clinical spectrum associated with mutations in RD genes.}, language = {en} } @article{WeismannSchneiderHoeybye2016, author = {Weismann, Dirk and Schneider, Andreas and H{\"o}ybye, Charlotte}, title = {Clinical aspects of symptomatic hyponatremia}, series = {Endocrine Connections}, volume = {5}, journal = {Endocrine Connections}, number = {5}, doi = {10.1530/EC-16-0046}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-162936}, pages = {R35-R43}, year = {2016}, abstract = {Hyponatremia (HN) is a common condition, with a large number of etiologies and a complicated treatment. Although chronic HN has been shown to be a predictor of poor outcome, sodium-increasing treatments in chronic stable and asymptomatic HN have not proven to increase life expectancy. For symptomatic HN, in contrast, the necessity for urgent treatment has broadly been accepted to avoid the development of fatal cerebral edema. On the other hand, a too rapid increase of serum sodium in chronic HN may result in cerebral damage due to osmotic demyelinisation. Recently, administration of hypertonic saline bolus has been recommended as first-line treatment in patients with moderate-to-severe symptomatic HN. This approach is easy to memorize and holds the potential to greatly facilitate the initial treatment of symptomatic HN. First-line treatment of chronic HN is fluid restriction and if ineffective treatment with tolvaptan or in some patients other agents should be considered. A number of recommendations and guidelines have been published on HN. In the present review, the management of patients with HN in relation to everyday clinical practice is summarized with focus on the acute management.}, language = {en} } @article{WeigandBoosTasbihietal.2016, author = {Weigand, Annika and Boos, Anja M. and Tasbihi, Kereshmeh and Beier, Justus P. and Dalton, Paul D. and Schrauder, Michael and Horch, Raymund E. and Beckmann, Matthias W. and Strissel, Pamela L. and Strick, Reiner}, title = {Selective isolation and characterization of primary cells from normal breast and tumors reveal plasticity of adipose derived stem cells}, series = {Breast Cancer Research}, volume = {18}, journal = {Breast Cancer Research}, number = {32}, doi = {10.1186/s13058-016-0688-2}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-164759}, year = {2016}, abstract = {Background There is a need to establish more cell lines from breast tumors in contrast to immortalized cell lines from metastatic effusions in order to represent the primary tumor and not principally metastatic biology of breast cancer. This investigation describes the simultaneous isolation, characterization, growth and function of primary mammary epithelial cells (MEC), mesenchymal cells (MES) and adipose derived stem cells (ADSC) from four normal breasts, one inflammatory and one triple-negative ductal breast tumors. Methods A total of 17 cell lines were established and gene expression was analyzed for MEC and MES (n = 42) and ADSC (n = 48) and MUC1, pan-KRT, CD90 and GATA-3 by immunofluorescence. DNA fingerprinting to track cell line identity was performed between original primary tissues and isolates. Functional studies included ADSC differentiation, tumor MES and MEC invasion co-cultured with ADSC-conditioned media (CM) and MES adhesion and growth on 3D-printed scaffolds. Results Comparative analysis showed higher gene expression of EPCAM, CD49f, CDH1 and KRTs for normal MEC lines; MES lines e.g. Vimentin, CD10, ACTA2 and MMP9; and ADSC lines e.g. CD105, CD90, CDH2 and CDH11. Compared to the mean of all four normal breast cell lines, both breast tumor cell lines demonstrated significantly lower ADSC marker gene expression, but higher expression of mesenchymal and invasion gene markers like SNAI1 and MMP2. When compared with four normal ADSC differentiated lineages, both tumor ADSC showed impaired osteogenic and chondrogenic but enhanced adipogenic differentiation and endothelial-like structures, possibly due to high PDGFRB and CD34. Addressing a functional role for overproduction of adipocytes, we initiated 3D-invasion studies including different cell types from the same patient. CM from ADSC differentiating into adipocytes induced tumor MEC 3D-invasion via EMT and amoeboid phenotypes. Normal MES breast cells adhered and proliferated on 3D-printed scaffolds containing 20 fibers, but not on 2.5D-printed scaffolds with single fiber layers, important for tissue engineering. Conclusion Expression analyses confirmed successful simultaneous cell isolations of three different phenotypes from normal and tumor primary breast tissues. Our cell culture studies support that breast-tumor environment differentially regulates tumor ADSC plasticity as well as cell invasion and demonstrates applications for regenerative medicine.}, language = {en} } @article{WeidnerRousseauPlauthetal.2016, author = {Weidner, Christopher and Rousseau, Morten and Plauth, Annabell and Wowro, Sylvia J. and Fischer, Cornelius and Abdel-Aziz, Heba and Sauer, Sascha}, title = {Iberis amara Extract Induces Intracellular Formation of Reactive Oxygen Species and Inhibits Colon Cancer}, series = {PLoS ONE}, volume = {11}, journal = {PLoS ONE}, number = {4}, doi = {10.1371/journal.pone.0152398}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-167044}, pages = {e0152398}, year = {2016}, abstract = {Massively increasing global incidences of colorectal cancer require efficient treatment and prevention strategies. Here, we report unexpected anticancerogenic effects of hydroethanolic Iberis amara extract (IAE), which is known as a widely used phytomedical product for treating gastrointestinal complaints. IAE significantly inhibited the proliferation of HT-29 and T84 colon carcinoma cells with an inhibitory concentration (IC\(_{50}\)) of 6 and 9 μg/ml, respectively, and further generated inhibitory effects in PC-3 prostate and MCF7 breast cancer cells. Inhibition of proliferation in HT-29 cells was associated with a G2/M phase cell cycle arrest including reduced expression of various regulatory marker proteins. Notably, in HT-29 cells IAE further induced apoptosis by intracellular formation of reactive oxygen species (ROS). Consistent with predictions derived from our in vitro experiments, bidaily oral gavage of 50 mg/kg of IAE over 4 weeks resulted in significant inhibition of tumor growth in a mouse HT-29 tumor xenograft model. Taken together, Iberis amara extracts could become useful alternatives for preventing and treating the progression of colon cancer.}, language = {en} } @article{WeidemannMaierStoerketal.2016, author = {Weidemann, Frank and Maier, Sebastian K. G. and St{\"o}rk, Stefan and Brunner, Thomas and Liu, Dan and Hu, Kai and Seydelmann, Nora and Schneider, Andreas and Becher, Jan and Canan-K{\"u}hl, Sima and Blaschke, Daniela and Bijnens, Bart and Ertl, Georg and Wanner, Christoph and Nordbeck, Peter}, title = {Usefulness of an implantable loop recorder to detect clinically relevant arrhythmias in patients with advanced fabry cardiomyopathy}, series = {The American Journal of Cardiology}, volume = {118}, journal = {The American Journal of Cardiology}, number = {2}, doi = {10.1016/j.amjcard.2016.04.033}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-188093}, pages = {264-274}, year = {2016}, abstract = {Patients with genetic cardiomyopathy that involves myocardial hypertrophy often develop clinically relevant arrhythmias that increase the risk of sudden death. Consequently, guidelines for medical device therapy were established for hypertrophic cardiomyopathy, but not for conditions with only anecdotal evidence of arrhythmias, like Fabry cardiomyopathy. Patients with Fabry cardiomyopathy progressively develop myocardial fibrosis, and sudden cardiac death occurs regularly. Because 24-hour Holier electrocardiograms (ECGs) might not detect clinically important arrhythmias, we tested an implanted loop recorder for continuous heart rhythm surveillance and determined its impact on therapy. This prospective study included 16 patients (12 men) with advanced Fabry cardiomyopathy, relevant hypertrophy, and replacement fibrosis in "loco typico." No patients previously exhibited clinically relevant arrhythmias on Holier ECGs. Patients received an implantable loop recorder and were prospectively followed with telemedicine for a median of 1.2 years (range 0.3 to 2.0 years). The primary end point was a clinically meaningful event, which required a therapy change, captured with the loop recorder. Patients submitted data regularly (14 +/- 11 times per month). During follow-up, 21 events were detected (including 4 asystole, i.e., ECG pauses >= 3 seconds) and 7 bradycardia events; 5 episodes of intermittent atrial fibrillation (>3 minutes) and 5 episodes of ventricular tachycardia (3 sustained and 2 nonsustained). Subsequently, as defined in the primary end point, 15 events leaded to a change of therapy. These patients required therapy with a pacemaker or cardioverter defibrillator implantation and/or anticoagulation therapy for atrial fibrillation. In conclusion, clinically relevant arrhythmias that require further device and/or medical therapy are often missed with Holier ECGs in patients with advanced stage Fabry cardiomyopathy, but they can be detected by telemonitoring with an implantable loop recorder.}, language = {en} }