Information de reference pour ce titreAccession Number: | 00124737-200609000-00011.
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Author: | Prasad, Dipti a,b; Rothlin, Carla Vanina a; Burrola, Patrick a; Burstyn-Cohen, Tal a; Lu, Qingxian a; de Frutos, Pablo Garcia c; Lemke, Greg a,*
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Institution: | (a)Molecular Neurobiology Laboratory, The Salk Institute, 10010 N. Torrey Pines Rd., La Jolla, CA 92037, USA (b)Department of Neurosciences, UC San Diego, La Jolla, CA 92093, USA (c)Instituto de Investigaciones Biomedicas de Barcelona (IIBB-CSIC-IDIBAPS), Barcelona, Spain
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Title: | TAM receptor function in the retinal pigment epithelium.[Article]
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Source: | Molecular and Cellular Neuroscience. 33(1):96-108, September 2006.
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Abstract: | : The TAM receptor tyrosine kinase Mer is expressed by cells of the retinal pigment epithelium (RPE), and genetic studies have demonstrated that Mer is essential for RPE function. RPE cells that lack Mer exhibit a severely compromised ability to phagocytose the distal ends of photoreceptor (PR) outer segments, which leads to the complete postnatal degeneration of photoreceptors and to blindness. Although in vitro experiments have implicated Gas6 as the critical TAM ligand for this process, we find that Gas6 mutant mice have a histologically intact retina with no photoreceptor degeneration. We further find that, in addition to Mer, RPE cells also express another TAM receptor - Tyro 3 - and that both of these receptors are instead activated independently by the Gas6-related ligand Protein S. This protein is also expressed by RPE cells. Finally, we demonstrate that loss of Mer function is accompanied by a substantial down-regulation in Tyro 3 as well. These observations indicate that both Mer and Tyro 3 act in mouse RPE cells and suggest that their biologically relevant ligand in these cells is Protein S.
(C) 2006Elsevier, Inc.
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Language: | English.
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Document Type: | Articles.
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Journal Subset: | Life & Biomedical Sciences.
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ISSN: | 1044-7431
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DOI Number: | https://dx.doi.org/10.1016/j.mcn...- ouverture dans une nouvelle fenêtre
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