Institution
University of Düsseldorf
Education•Düsseldorf, Germany•
About: University of Düsseldorf is a education organization based out in Düsseldorf, Germany. It is known for research contribution in the topics: Population & Transplantation. The organization has 25225 authors who have published 49155 publications receiving 1946434 citations.
Topics: Population, Transplantation, Diabetes mellitus, Gene, Type 2 diabetes
Papers published on a yearly basis
Papers
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TL;DR: Various growth factors modulate Leydig cell differentiation, regeneration, and steroidogenic capacity, for example, interleukin 1alpha, transforming growth factor beta, inhibin, insulin- like growth factors I and II, vascular endothelial growth factor, and relaxin-like growth factor.
Abstract: This article reviews results on differentiation, structure, and regulation of Leydig cells in the testes of rodents and men. Two different populations-fetal and adult Leydig cells-can be recognized in rodents. The cells in these two populations are different in ultrastructure, life span, capacity for androgen synthesis, and mechanisms of regulation. A brief survey on the origin, ontogenesis, characterization of precursors, ultrastructure, and functional markers of fetal and adult Leydig cells is presented, followed by an analysis of genes in Leydig cells and the role of luteinizing hormone and its receptor, steroidogenic acute regulatory protein, hydroxysteroid dehydrogenases, androgen and its receptor, anti-Mullerian hormone, estrogens, and thyroid hormones. Various growth factors modulate Leydig cell differentiation, regeneration, and steroidogenic capacity, for example, interleukin 1alpha, transforming growth factor beta, inhibin, insulin-like growth factors I and II, vascular endothelial growth factor, and relaxin-like growth factor. Retinol and retinoic acid increase basal testosterone secretion in adult Leydig cells, but decrease it in fetal Leydig cells. Resident macrophages in the interstitial tissue of the testis are important for differentiation and function of Leydig cells. Apoptosis of Leydig cells is involved in the regulation of Leydig cell number and can be induced by cytotoxins. Characteristics of aging Leydig cells in rodents seem to be species specific. 11beta-hydroxysteroid dehydrogenase protects testosterone synthesis in the Leydig cells of stressed rats. Last, the following aspects of human Leydig cells are briefly described: origin, differentiation, triphasic development, aging changes, pathological changes, and gene mutations leading to infertility.
322 citations
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TL;DR: The discovery of a short-lived chaperone that is required for the correct maturation of the eukaryotic 20S proteasome and is destroyed at a specific stage of the assembly process is reported and it is shown that the propeptide of the Pre2p/Doa3p beta subunit is necessary for Ump1p's function in proteasomes maturation.
321 citations
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Kanazawa University1, Kobe University2, University of Düsseldorf3, Dalhousie University4, University of Osnabrück5, University of Oxford6, University of Lyon7, University of Marburg8, Ghent University9, University of Würzburg10, Charles University in Prague11, Martin Luther University of Halle-Wittenberg12, Adelphi University13, University of Jena14, Leibniz Association15, University of Maryland, College Park16, National Institute of Genetics17, University of Tokyo18, Wageningen University and Research Centre19, John Innes Centre20, New York Botanical Garden21, University of Copenhagen22, University of Cologne23, University of Pretoria24, Institute of Science and Technology Austria25, University of New South Wales26, University of Toulouse27, Université Paris-Saclay28
TL;DR: Transcriptomic analysis of sexual reproductive structures reveals intricate control by TFs, activity of the ROS gene network, and the ancestral use of plant-like storage and stress protection proteins in the zygote.
321 citations
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University Hospital Bonn1, Goethe University Frankfurt2, Ruhr University Bochum3, University of Düsseldorf4, University Hospital Regensburg5, Leipzig University6, University of Münster7, University of Cologne8, University of Freiburg9, Ludwig Maximilian University of Munich10, University of Tübingen11, University of Mainz12, Technische Universität München13, University of Mannheim14, University of Ulm15, Free University of Berlin16, German Cancer Research Center17, University of Zurich18, University of Duisburg-Essen19
TL;DR: The results suggest that lomustine-temozolomide chemotherapy might improve survival compared with temozolmide standard therapy in patients with newly diagnosed glioblastoma with methylated MGMT promoter.
321 citations
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TL;DR: Numerical simulations show the validity of the analytical approach for the initial stage of the time evolution, provided that the harmonics generated by the nonlinear terms are considered.
Abstract: We study analytically and numerically modulational instabilities in discrete nonlinear chains, taking the discrete Klein-Gordon model as an example. We show that discreteness can drastically change the conditions for modulational instability; e.g., at small wave numbers a nonlinear carrier wave is unstable to all possible modulations of its amplitude if the wave amplitude exceeds a certain threshold value. Numerical simulations show the validity of the analytical approach for the initial stage of the time evolution, provided that the harmonics generated by the nonlinear terms are considered. The long-term evolution exhibits chaoticlike states.
321 citations
Authors
Showing all 25575 results
Name | H-index | Papers | Citations |
---|---|---|---|
Karl J. Friston | 217 | 1267 | 217169 |
Roderick T. Bronson | 169 | 679 | 107702 |
Stanley B. Prusiner | 168 | 745 | 97528 |
Ralph A. DeFronzo | 160 | 759 | 132993 |
Monique M.B. Breteler | 159 | 546 | 93762 |
Thomas Meitinger | 155 | 716 | 108491 |
Karl Zilles | 138 | 692 | 72733 |
Ruben C. Gur | 136 | 741 | 61312 |
Alexis Brice | 135 | 870 | 83466 |
Michael Schmitt | 134 | 2007 | 114667 |
Michael Weller | 134 | 1105 | 91874 |
Helmut Sies | 133 | 670 | 78319 |
Peter T. Fox | 131 | 622 | 83369 |
Yuri S. Kivshar | 126 | 1845 | 79415 |
Markus M. Nöthen | 125 | 943 | 83156 |