Interaction of merosin (laminin 2) with very late activation antigen-6 is necessary for the survival of CD4+ CD8+ immature thymocytes
نویسندگان
چکیده
منابع مشابه
MEK activity regulates negative selection of immature CD4+CD8+ thymocytes.
CD4+CD8+ thymocytes are either positively selected and subsequently mature to CD4 single positive (SP) or CD8 SP T cells, or they die by apoptosis due to neglect or negative selection. This clonal selection is essential for establishing a functional self-restricted T cell repertoire. Intracellular signals through the three known mitogen-activated protein (MAP) kinase pathways have been shown to...
متن کاملEngagement of CD4 and CD8 expressed on immature thymocytes induces activation of intracellular tyrosine phosphorylation pathways
Accumulating data suggest that the target cells for selection events leading to establishment of the mature T cell repertoire are the functionally immature double-positive (CD4+/CD8+) thymocytes, and that the CD4 and CD8 antigens expressed on these cells play important roles in these processes. In an attempt to define the biochemical pathways implicated in these events, we have studied the effe...
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The mechanisms responsible for the accumulation of eosinophils at sites of allergic and other inflammatory reactions are unknown, but recent studies have implicated both eosinophil and endothelial adhesion molecules in this process. However, less well studied have been the adhesive interactions between eosinophils and the subendothelial basement membrane and interstitial connective tissues. To ...
متن کاملPARP-2 deficiency affects the survival of CD4+CD8+ double-positive thymocytes.
Poly-(ADP-ribose) polymerase-2 (PARP-2) belongs to a large family of enzymes that synthesize and transfer ADP-ribose polymers to acceptor proteins, modifying their functional properties. PARP-2-deficient (Parp-2-/-) cells, similar to Parp-1-/- cells, are sensitive to both ionizing radiation and alkylating agents. Here we show that inactivation of mouse Parp-2, but not Parp-1, produced a two-fol...
متن کاملBiochemical and kinetic characterization of the glucocorticoid-induced apoptosis of immature CD4+CD8+ thymocytes.
We characterized kinetic and biochemical changes during glucocorticoid (GC)-induced apoptosis of immature CD8+CD4+ double-positive (DP) thymocytes. A GC analog dexamethasone (Dex) induced rapid apoptotic commitment and a transient up-regulation of the NF-kappaB/RelA-p50-binding activity in DP cells. This required an early activation of proteasome, as judged by the ability of a specific proteaso...
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ژورنال
عنوان ژورنال: Immunology
سال: 2000
ISSN: 0019-2805
DOI: 10.1046/j.1365-2567.2000.00990.x