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Martina Lubrano di Ricco Emilie Ronin Davi Collares Jordane Divoux Sylvie Grégoire Harald Wajant Tomás Gomes Yenkel Grinberg-Bleyer Véronique Baud Gilles Marodon Benoît L. Salomon 《European journal of immunology》2020,50(7):972-985
Several drugs targeting members of the TNF superfamily or TNF receptor superfamily (TNFRSF) are widely used in medicine or are currently being tested in therapeutic trials. However, their mechanism of action remains poorly understood. Here, we explored the effects of TNFRSF co-stimulation on murine Foxp3+ regulatory T cell (Treg) biology, as they are pivotal modulators of immune responses. We show that engagement of TNFR2, 4-1BB, GITR, and DR3, but not OX40, increases Treg proliferation and survival. Triggering these TNFRSF in Tregs induces similar changes in gene expression patterns, suggesting that they engage common signal transduction pathways. Among them, we identified a major role of canonical NF-κB. Importantly, TNFRSF co-stimulation improves the ability of Tregs to suppress colitis. Our data demonstrate that stimulation of discrete TNFRSF members enhances Treg activation and function through a shared mechanism. Consequently, therapeutic effects of drugs targeting TNFRSF or their ligands may be mediated by their effect on Tregs. 相似文献
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Cayre M Malaterre J Scotto-Lomassese S Aouane A Strambi C Strambi A 《Journal of neuroscience research》2005,82(5):659-664
From invertebrates to humans, it has been demonstrated that new neurons are added to specific brain structures throughout adult life. In the house cricket, adult neurogenesis occurs in the mushroom bodies, the main sensory integrative center of the brain, often considered an analogue of vertebrate hippocampus. We have previously shown that this neurogenesis can be modulated by hormones through the polyamine pathway and by environmental conditions through sensory inputs and the nitric oxide pathway. Environment-induced neurogenesis is independent of juvenile hormone levels, so we addressed the roles of sensory inputs and hormones in the control of neuroblast proliferation. Here, by using double labelling of cells specifically in S phase (5-bromo-2'-deoxyuridine) together with labelling of mitotically active cells in any phase (proliferating cell nuclear antigen), we show that juvenile hormone acts on progenitor cell proliferation by inducing quiescent neuroblasts to enter the cell cycle, whereas sensory inputs act by shortening the cell cycle. Thus, in the adult house cricket, regulation of neuroblast proliferation by hormonal and environmental cues occurs through two independent modes of action. 相似文献
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Jordane Demonchy Camille Cordier Emilie Fréalle Hélène Demarquette Charles Herbaux Guillaume Escure Alexandre Willaume Zoé Van De Wyngaert Marie-Pierre Noel Thierry Facon Karine Faure Jessica Caro Gareth Morgan Faith E. Davies Serge Alfandari Claire Bories Eileen M. Boyle 《Clinical Lymphoma, Myeloma & Leukemia》2021,21(6):e545-e547
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Sébastien Bailly Elodie Gautier-Veyret Minh P. Lê Lila Bouadma Olivier Andremont Mathilde Neuville Bruno Mourvillier Romain Sonneville Eric Magalhaes Jordane Lebut Aguila Radjou Roland Smonig Michel Wolff Laurent Massias Claire Dupuis Jean-Fran?ois Timsit 《Antimicrobial agents and chemotherapy》2020,64(12)
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Miao RY Drabsch Y Cross RS Cheasley D Carpinteri S Pereira L Malaterre J Gonda TJ Anderson RL Ramsay RG 《Cancer research》2011,71(22):7029-7037
MYB oncogene upregulation is associated with estrogen receptor (ER)-positive breast cancer, but disease requirements for MYB function in vivo have not been explored. In this study, we provide evidence of a critical requirement for MYB functions in models of human and murine breast cancer. In human breast cancer, we found that MYB expression was critical for tumor cell growth both in vitro and in vivo in xenograft settings. In transgenic knockout mice, tissue-specific deletion of the murine MYB gene caused a transient defect in mammary gland development that was reflected in delayed ductal branching and defective apical bud formation. In mouse mammary tumor virus (MMTV)-NEU mice where tumors are initiated by activation of HER2, MYB deletion was sufficient to abolish tumor formation. In the more aggressive MMTV-PyMT model system, MYB deletion delayed tumorigenesis significantly. Together, the findings in these transgenic knockout models implied that MYB was critical during an early window in mammary development when it was essential for tumor initiation, even though MYB loss did not exert a lasting impact upon normal mammary function. Two important MYB-target genes that promote cell survival, BCL2 and GRP78/BIP, were each elevated compared with nontransformed mammary epithelial cells, thereby promoting survival as confirmed in colony formation assays in vitro. Taken together, our findings establish a role for MYB at the hub of ER- and HER2-dependent pathways in mammary carcinogenesis. 相似文献
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Malaterre J Mantamadiotis T Dworkin S Lightowler S Yang Q Ransome MI Turnley AM Nichols NR Emambokus NR Frampton J Ramsay RG 《Stem cells (Dayton, Ohio)》2008,26(1):173-181
Ongoing production of neurons in adult brain is restricted to specialized neurogenic niches. Deregulated expression of genes controlling homeostasis of neural progenitor cell division and/or their microenvironment underpins a spectrum of brain pathologies. Using conditional gene deletion, we show that the proto-oncogene c-myb regulates neural progenitor cell proliferation and maintains ependymal cell integrity in mice. These two cellular compartments constitute the neurogenic niche in the adult brain. Brains devoid of c-Myb showed enlarged ventricular spaces, ependymal cell abnormalities, and reduced neurogenesis. Neural progenitor cells lacking c-Myb showed a reduced intrinsic proliferative capacity and reduction of Sox-2 and Pax-6 expression. These data point to an important role for c-Myb in the neurogenic niche of the adult brain. 相似文献
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Andreas Brunklaus Juanjiangmeng Du Felix Steckler Ismael I. Ghanty Katrine M. Johannesen Christina Dühring Fenger Stephanie Schorge David Baez-Nieto Hao-Ran Wang Andrew Allen Jen Q. Pan Holger Lerche Henrike Heyne Joseph D. Symonds Sameer M. Zuberi Stephan Sanders Beth R. Sheidley Dana Craiu Heather E. Olson Sarah Weckhuysen Peter DeJonge Ingo Helbig Hilde Van Esch Tiffany Busa Matthieu Milh Bertrand Isidor Christel Depienne Annapurna Poduri Arthur J. Campbell Jordane Dimidschstein Rikke S. Møller Dennis Lal 《Epilepsia》2020,61(3):387-399