@article{ElHajjDittrichBoecketal.2016, author = {El Hajj, Nady and Dittrich, Marcus and B{\"o}ck, Julia and Kraus, Theo F. J. and Nanda, Indrajit and M{\"u}ller, Tobias and Seidmann, Larissa and Tralau, Tim and Galetzka, Danuta and Schneider, Eberhard and Haaf, Thomas}, title = {Epigenetic dysregulation in the developing Down syndrome cortex}, series = {Epigenetics}, volume = {11}, journal = {Epigenetics}, number = {8}, doi = {10.1080/15592294.2016.1192736}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-191239}, pages = {563-578}, year = {2016}, abstract = {Using Illumina 450K arrays, 1.85\% of all analyzed CpG sites were significantly hypermethylated and 0.31\% hypomethylated in fetal Down syndrome (DS) cortex throughout the genome. The methylation changes on chromosome 21 appeared to be balanced between hypo- and hyper-methylation, whereas, consistent with prior reports, all other chromosomes showed 3-11times more hyper- than hypo-methylated sites. Reduced NRSF/REST expression due to upregulation of DYRK1A (on chromosome 21q22.13) and methylation of REST binding sites during early developmental stages may contribute to this genome-wide excess of hypermethylated sites. Upregulation of DNMT3L (on chromosome 21q22.4) could lead to de novo methylation in neuroprogenitors, which then persists in the fetal DS brain where DNMT3A and DNMT3B become downregulated. The vast majority of differentially methylated promoters and genes was hypermethylated in DS and located outside chromosome 21, including the protocadherin gamma (PCDHG) cluster on chromosome 5q31, which is crucial for neural circuit formation in the developing brain. Bisulfite pyrosequencing and targeted RNA sequencing showed that several genes of PCDHG subfamilies A and B are hypermethylated and transcriptionally downregulated in fetal DS cortex. Decreased PCDHG expression is expected to reduce dendrite arborization and growth in cortical neurons. Since constitutive hypermethylation of PCDHG and other genes affects multiple tissues, including blood, it may provide useful biomarkers for DS brain development and pharmacologic targets for therapeutic interventions.}, language = {en} } @article{SchneiderDittrichBoecketal.2016, author = {Schneider, Eberhard and Dittrich, Marcus and B{\"o}ck, Julia and Nanda, Indrajit and M{\"u}ller, Tobias and Seidmann, Larissa and Tralau, Tim and Galetzka, Danuta and El Hajj, Nady and Haaf, Thomas}, title = {CpG sites with continuously increasing or decreasing methylation from early to late human fetal brain development}, series = {Gene}, volume = {592}, journal = {Gene}, number = {1}, doi = {10.1016/j.gene.2016.07.058}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-186936}, pages = {110-118}, year = {2016}, abstract = {Normal human brain development is dependent on highly dynamic epigenetic processes for spatial and temporal gene regulation. Recent work identified wide-spread changes in DNA methylation during fetal brain development. We profiled CpG methylation in frontal cortex of 27 fetuses from gestational weeks 12-42, using Illumina 450K methylation arrays. Sites showing genome-wide significant correlation with gestational age were compared to a publicly available data set from gestational weeks 3-26. Altogether, we identified 2016 matching developmentally regulated differentially methylated positions (m-dDMPs): 1767 m-dDMPs were hypermethylated and 1149 hypomethylated during fetal development. M-dDMPs are underrepresented in CpG islands and gene promoters, and enriched in gene bodies. They appear to cluster in certain chromosome regions. M-dDMPs are significantly enriched in autism-associated genes and CpGs. Our results promote the idea that reduced methylation dynamics during fetal brain development may predispose to autism. In addition, m-dDMPs are enriched in genes with human-specific brain expression patterns and/or histone modifications. Collectively, we defined a subset of dDMPs exhibiting constant methylation changes from early to late pregnancy. The same epigenetic mechanisms involving methylation changes in cis-regulatory regions may have been adopted for human brain evolution and ontogeny.}, language = {en} } @article{StennettJayaramanBrueckneretal.2020, author = {Stennett, Tom E. and Jayaraman, Arumugam and Br{\"u}ckner, Tobias and Schneider, Lea and Braunschweig, Holger}, title = {Hydrophosphination of boron-boron multiple bonds}, series = {Chemical Science}, volume = {11}, journal = {Chemical Science}, doi = {10.1039/c9sc05908c}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-240681}, pages = {1335-1341}, year = {2020}, abstract = {Five compounds containing boron-boron multiple bonds are shown to undergo hydrophosphination reactions with diphenylphosphine in the absence of a catalyst. With diborenes, the products obtained are highly dependent on the substitution pattern at the boron atoms, with both 1,1- and 1,2- hydrophosphinations observed. With a symmetrical diboryne, 1,2-hydrophosphination yields a hydro(phosphino)diborene. The different mechanistic pathways for the hydrophosphination of diborenes are rationalised with the aid of density functional theory calculations.}, language = {en} } @article{BetzSchneiderKressetal.2012, author = {Betz, Boris and Schneider, Reinhard and Kress, Tobias and Schick, Martin Alexander and Wanner, Christoph and Sauvant, Christoph}, title = {Rosiglitazone Affects Nitric Oxide Synthases and Improves Renal Outcome in a Rat Model of Severe Ischemia/Reperfusion Injury}, series = {PPAR Research}, volume = {2012}, journal = {PPAR Research}, number = {Article ID 219319}, doi = {10.1155/2012/219319}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-130872}, pages = {12}, year = {2012}, abstract = {Background. Nitric oxide (NO)-signal transduction plays an important role in renal ischemia/reperfusion (I/R) injury. NO produced by endothelial NO-synthase (eNOS) has protective functions whereas NO from inducible NO-synthase (iNOS) induces impairment. Rosiglitazone (RGZ), a peroxisome proliferator-activated receptor (PPAR)-gamma agonist exerted beneficial effects after renal I/R injury, so we investigated whether this might be causally linked with NOS imbalance. Methods. RGZ (5 mg/kg) was administered i.p. to SD-rats (f) subjected to bilateral renal ischemia (60 min). Following 24 h of reperfusion, inulin-and PAH-clearance as well as PAH-net secretion were determined. Morphological alterations were graded by histopathological scoring. Plasma NOx-production was measured. eNOS and iNOS expression was analyzed by qPCR. Cleaved caspase 3 (CC3) was determined as an apoptosis indicator and ED1 as a marker of macrophage infiltration in renal tissue. Results. RGZ improves renal function after renal I/R injury (PAH-/inulin-clearance, PAH-net secretion) and reduces histomorphological injury. Additionally, RGZ reduces NOx plasma levels, ED-1 positive cell infiltration and CC3 expression. iNOS-mRNA is reduced whereas eNOS-mRNA is increased by RGZ. Conclusion. RGZ has protective properties after severe renal I/R injury. Alterations of the NO pathway regarding eNOS and iNOS could be an explanation of the underlying mechanism of RGZ protection in renal I/R injury.}, language = {en} } @article{KneisslAbelRasbachetal.2012, author = {Kneissl, Sabrina and Abel, Tobias and Rasbach, Anke and Brynza, Julia and Schneider-Schaulies, J{\"u}rgen and Buchholz, Christian J.}, title = {Measles Virus Glycoprotein-Based Lentiviral Targeting Vectors That Avoid Neutralizing Antibodies}, series = {PLoS One}, volume = {7}, journal = {PLoS One}, number = {10}, doi = {10.1371/journal.pone.0046667}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-134993}, pages = {e46667}, year = {2012}, abstract = {Lentiviral vectors (LVs) are potent gene transfer vehicles frequently applied in research and recently also in clinical trials. Retargeting LV entry to cell types of interest is a key issue to improve gene transfer safety and efficacy. Recently, we have developed a targeting method for LVs by incorporating engineered measles virus (MV) glycoproteins, the hemagglutinin (H), responsible for receptor recognition, and the fusion protein into their envelope. The H protein displays a single-chain antibody (scFv) specific for the target receptor and is ablated for recognition of the MV receptors CD46 and SLAM by point mutations in its ectodomain. A potential hindrance to systemic administration in humans is pre-existing MV-specific immunity due to vaccination or natural infection. We compared transduction of targeting vectors and non-targeting vectors pseudotyped with MV glycoproteins unmodified in their ectodomains (MV-LV) in presence of \(\alpha\)-MV antibody-positive human plasma. At plasma dilution 1: 160 MV-LV was almost completely neutralized, whereas targeting vectors showed relative transduction efficiencies from 60\% to 90\%. Furthermore, at plasma dilution 1: 80 an at least 4-times higher multiplicity of infection (MOI) of MV-LV had to be applied to obtain similar transduction efficiencies as with targeting vectors. Also when the vectors were normalized to their p24 values, targeting vectors showed partial protection against \(\alpha\)-MV antibodies in human plasma. Furthermore, the monoclonal neutralizing antibody K71 with a putative epitope close to the receptor binding sites of H, did not neutralize the targeting vectors, but did neutralize MV-LV. The observed escape from neutralization may be due to the point mutations in the H ectodomain that might have destroyed antibody binding sites. Furthermore, scFv mediated cell entry via the target receptor may proceed in presence of a-MV antibodies interfering with entry via the natural MV receptors. These results are promising for in vivo applications of targeting vectors in humans.}, language = {en} } @article{RauHeindelUnsleberetal.2014, author = {Rau, Markus and Heindel, Tobias and Unsleber, Sebastian and Braun, Tristan and Fischer, Julian and Frick, Stefan and Nauerth, Sebastian and Schneider, Christian and Vest, Gwenaelle and Reitzenstein, Stephan and Kamp, Martin and Forchel, Alfred and H{\"o}fling, Sven and Weinfurter, Harald}, title = {Free space quantum key distribution over 500 meters using electrically driven quantum dot single-photon sources-a proof of principle experiment}, series = {New Journal of Physics}, volume = {16}, journal = {New Journal of Physics}, number = {043003}, doi = {10.1088/1367-2630/16/4/043003}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-116760}, year = {2014}, abstract = {Highly efficient single-photon sources (SPS) can increase the secure key rate of quantum key distribution (QKD) systems compared to conventional attenuated laser systems. Here we report on a free space QKD test using an electrically driven quantum dot single-photon source (QD SPS) that does not require a separate laser setup for optical pumping and thus allows for a simple and compact SPS QKD system. We describe its implementation in our 500 m free space QKD system in downtown Munich. Emulating a BB84 protocol operating at a repetition rate of 125 MHz, we could achieve sifted key rates of 5-17 kHz with error ratios of 6-9\% and g((2))(0)-values of 0.39-0.76.}, language = {en} } @phdthesis{Schneider2006, author = {Schneider, Tobias}, title = {Fragmentbefestigung bei Kronenfrakturen - Eine In-vitro Untersuchung zur Verbundfestigkeit verschiedener Dentinadh{\"a}sivsysteme -}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-22077}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2006}, abstract = {Unkomplizierte Kronenfrakturen geh{\"o}ren zu den h{\"a}ufigsten Verletzungen der Zahnhartsubstanz. Um eine schnelle Behandlung des Patienten zu gew{\"a}hrleisten, wird das Zahnfragment oftmals mit Dentinadh{\"a}siven wiederbefestigt. Die vorliegende Arbeit untersuchte, ob die Verwendung unterschiedlicher Dentinadh{\"a}sive die Bruchfestigkeit des geklebten Zahnes beeinflusst und ob die zus{\"a}tzliche Verwendung eines fließf{\"a}higen Komposits hierbei von Vorteil ist. Des Weiteren wurde gepr{\"u}ft, ob es einen Zusammenhang zwischen der Gr{\"o}ße der Bruchfl{\"a}che und der Frakturfestigkeit der Z{\"a}hne gibt. F{\"u}r die Untersuchungen wurden extrahierte Z{\"a}hne mit einer Universalpr{\"u}fmaschine gebrochen, die Bruchfl{\"a}che vermessen, das Bruchfragment adh{\"a}siv wiederbefestigt und erneut gebrochen und vermessen. Die Frakturfestigkeit aus zweitem und ersten Bruch wurden in ein prozentuales Verh{\"a}ltnis gestellt. Es wurden vier verschiedene Adh{\"a}sivsysteme (OptiBond® FL, Syntac®, Adhese ®, Adper ®Prompt®L-Pop®) verwendet. Ein Adh{\"a}sivsystem wurde zus{\"a}tzlich noch in Verbindung mit einem fließf{\"a}higen Komposit eingesetzt (OptiBondFL® + Tetric Flow®). Die statistische Auswertung der Bruchversuche ergab deutliche Unterschiede zwischen den verwendeten Adh{\"a}sivsystemen. Verglichen mit der Bruchfestigkeit gesunder Z{\"a}hne erreichten mit OptiBond® FL geklebte Z{\"a}hne bei einem Medianwert von 41\% die h{\"o}chste Bruchfestigkeit. Zwischen den Systemen Adhese® (23\%) und Syntac® (19\%) konnte kein signifikanter Unterschied gefunden werden. Adper®Prompt®L-Pop®, erreichte mit einem Medianwert von 8\% den geringsten Wert. Die zus{\"a}tzliche Verwendung von fließf{\"a}higem Komposit (OptiBond® FL+ Tetric Flow®) ergab keine signifikante Verbesserung der Bruchfestigkeit gegen{\"u}ber der alleinigen Verwendung von OptiBond® FL. In allen Versuchsgruppen zeigte sich, dass die Gr{\"o}ße der Bruchfl{\"a}che keinen Einfluss auf die Frakturfestigkeit hat.}, language = {de} } @article{AeschlimannBauerBayeretal.2012, author = {Aeschlimann, Martin and Bauer, Michael and Bayer, Daniela and Brixner, Tobias and Cunovic, Stefan and Fischer, Alexander and Melchior, Pascal and Pfeiffer, Walter and Rohmer, Martin and Schneider, Christian and Str{\"u}ber, Christian and Tuchscherer, Philip and Voronine, Dimitri V.}, title = {Optimal open-loop near-field control of plasmonic nanostructures}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-75256}, year = {2012}, abstract = {Optimal open-loop control, i.e. the application of an analytically derived control rule, is demonstrated for nanooptical excitations using polarization-shaped laser pulses. Optimal spatial near-field localization in gold nanoprisms and excitation switching is realized by applying a shift to the relative phase of the two polarization components. The achieved near-field switching confirms theoretical predictions, proves the applicability of predefined control rules in nanooptical light-matter interaction and reveals local mode interference to be an important control mechanism.}, subject = {Chemie}, language = {en} } @article{RaynerColemanPurvesetal.2019, author = {Rayner, Christopher and Coleman, Jonathan R. I. and Purves, Kirstin L. and Hodsoll, John and Goldsmith, Kimberley and Alpers, Georg W. and Andersson, Evelyn and Arolt, Volker and Boberg, Julia and B{\"o}gels, Susan and Creswell, Cathy and Cooper, Peter and Curtis, Charles and Deckert, J{\"u}rgen and Domschke, Katharina and El Alaoui, Samir and Fehm, Lydia and Fydrich, Thomas and Gerlach, Alexander L. and Grocholewski, Anja and Hahlweg, Kurt and Hamm, Alfons and Hedman, Erik and Heiervang, Einar R. and Hudson, Jennifer L. and J{\"o}hren, Peter and Keers, Robert and Kircher, Tilo and Lang, Thomas and Lavebratt, Catharina and Lee, Sang-hyuck and Lester, Kathryn J. and Lindefors, Nils and Margraf, J{\"u}rgen and Nauta, Maaike and Pan{\´e}-Farr{\´e}, Christiane A. and Pauli, Paul and Rapee, Ronald M. and Reif, Andreas and Rief, Winfried and Roberts, Susanna and Schalling, Martin and Schneider, Silvia and Silverman, Wendy K. and Str{\"o}hle, Andreas and Teismann, Tobias and Thastum, Mikael and Wannem{\"u}ller, Andre and Weber, Heike and Wittchen, Hans-Ulrich and Wolf, Christiane and R{\"u}ck, Christian and Breen, Gerome and Eley, Thalia C.}, title = {A genome-wide association meta-analysis of prognostic outcomes following cognitive behavioural therapy in individuals with anxiety and depressive disorders}, series = {Translational Psychiatry}, volume = {9}, journal = {Translational Psychiatry}, number = {150}, doi = {10.1038/s41398-019-0481-y}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-225048}, pages = {1-13}, year = {2019}, abstract = {Major depressive disorder and the anxiety disorders are highly prevalent, disabling and moderately heritable. Depression and anxiety are also highly comorbid and have a strong genetic correlation (r(g) approximate to 1). Cognitive behavioural therapy is a leading evidence-based treatment but has variable outcomes. Currently, there are no strong predictors of outcome. Therapygenetics research aims to identify genetic predictors of prognosis following therapy. We performed genome-wide association meta-analyses of symptoms following cognitive behavioural therapy in adults with anxiety disorders (n = 972), adults with major depressive disorder (n = 832) and children with anxiety disorders (n = 920; meta-analysis n = 2724). We (h(SNP)(2)) and polygenic scoring was used to examine genetic associations between therapy outcomes and psychopathology, personality and estimated the variance in therapy outcomes that could be explained by common genetic variants learning. No single nucleotide polymorphisms were strongly associated with treatment outcomes. No significant estimate of h(SNP)(2) could be obtained, suggesting the heritability of therapy outcome is smaller than our analysis was powered to detect. Polygenic scoring failed to detect genetic overlap between therapy outcome and psychopathology, personality or learning. This study is the largest therapygenetics study to date. Results are consistent with previous, similarly powered genome-wide association studies of complex traits.}, language = {en} } @article{LiShanRupprechtetal.2022, author = {Li, Donghai and Shan, Hangyong and Rupprecht, Christoph and Knopf, Heiko and Watanabe, Kenji and Taniguchi, Takashi and Qin, Ying and Tongay, Sefaattin and Nuß, Matthias and Schr{\"o}der, Sven and Eilenberger, Falk and H{\"o}fling, Sven and Schneider, Christian and Brixner, Tobias}, title = {Hybridized exciton-photon-phonon states in a transition-metal-dichalcogenide van-der-Waals heterostructure microcavity}, series = {Physical Review Letters}, journal = {Physical Review Letters}, edition = {accepted version}, issn = {1079-7114}, doi = {10.1103/PhysRevLett.128.087401}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-351303}, year = {2022}, abstract = {Excitons in atomically thin transition-metal dichalcogenides (TMDs) have been established as an attractive platform to explore polaritonic physics, owing to their enormous binding energies and giant oscillator strength. Basic spectral features of exciton polaritons in TMD microcavities, thus far, were conventionally explained via two-coupled-oscillator models. This ignores, however, the impact of phonons on the polariton energy structure. Here we establish and quantify the threefold coupling between excitons, cavity photons, and phonons. For this purpose, we employ energy-momentum-resolved photoluminescence and spatially resolved coherent two-dimensional spectroscopy to investigate the spectral properties of a high-quality-factor microcavity with an embedded WSe\(_2\) van-der-Waals heterostructure at room temperature. Our approach reveals a rich multi-branch structure which thus far has not been captured in previous experiments. Simulation of the data reveals hybridized exciton-photon-phonon states, providing new physical insight into the exciton polariton system based on layered TMDs.}, language = {en} }