title: Integrin stimulation decreases tyrosine phosphorylation and activity of focal adhesion kinase in thymocytes.
abstract: FAK, focal adhesion kinase, is expressed in a variety of cell types and has been suggested to transduce signals brought about by integrin-extracellular matrix (ECM) interactions. Integrin stimulation increases tyrosine phosphorylation and activity of FAK in all the cells examined to date. In contrast, in thymocytes stimulation of VLA-4 (alpha 4 beta 1) and LFA-1 (alpha L beta 2) resulted in a marked decrease in tyrosine phosphorylation and activity of FAK.
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000502:physiology; D015815:Cell Adhesion Molecules / Q000096:biosynthesis / Q000378:metabolism*; D002478:Cells, Cultured; D004622:Embryo, Mammalian; D005109:Extracellular Matrix / Q000502:physiology; D005347:Fibroblasts / Q000201:enzymology / Q000276:immunology; D005434:Flow Cytometry; D051417:Focal Adhesion Kinase 1; D051416:Focal Adhesion Protein-Tyrosine Kinases; D015870:Gene Expression; D039041:Integrin alpha4beta1; D016023:Integrins / Q000502:physiology*; D016169:Lymphocyte Function-Associated Antigen-1 / Q000502:physiology*; D051379:Mice; D008810:Mice, Inbred C57BL; D010766:Phosphorylation; D019000:Phosphotyrosine / Q000378:metabolism*; D016133:Polymerase Chain Reaction; D011505:Protein-Tyrosine Kinases / Q000096:biosynthesis / Q000378:metabolism*; D011972:Receptor, Insulin / Q000378:metabolism; D016201:Receptors, Lymphocyte Homing / Q000502:physiology*; D013601:T-Lymphocytes / Q000276:immunology* / Q000502:physiology
chemical_list: D015703:Antigens, CD; D015815:Cell Adhesion Molecules; D039041:Integrin alpha4beta1; D016023:Integrins; D016169:Lymphocyte Function-Associated Antigen-1; D016201:Receptors, Lymphocyte Homing; D019000:Phosphotyrosine; D011505:Protein-Tyrosine Kinases; D011972:Receptor, Insulin; D051417:Focal Adhesion Kinase 1; D051416:Focal Adhesion Protein-Tyrosine Kinases; C496051:Ptk2 protein, mouse