Differential expression of CTLA-4 among T cell subsets
نویسندگان
چکیده
منابع مشابه
CTLA-4 differentially regulates the immunological synapse in CD4 T cell subsets.
Primary murine Th1 and Th2 cells differ in the organization of the immunological synapse, with Th1 cells, but not Th2 cells, clustering signaling molecules at the T cell/B cell synapse site. We sought to determine whether differential costimulatory signals could account for the differences observed. We found that Th2 cells express higher levels of CTLA-4 than Th1 cells, and demonstrated that Th...
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Background Cellular rejection of an allograft is mediated in part by peripheral blood T cells. We tested the hypothesis that quantitative changes in T-cell subsets can be detected in the peripheral blood and that these changes correlate with rejection. Methods and Results T-cell subset analysis was performed by flow cytometry using monoclonal antibodies recognizing six isotypic epitopes of the ...
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Regulation of peripheral T cell responses is critical for preserving self tolerance. Memory T cells have a lower threshold for activation through the TCR and are thought to be less dependent on costimulation than naive T cells, suggesting a requirement for more stringent regulation of memory T cells. We have recently shown that CD4 engagement apart from the TCR results in the inactivation of me...
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CTLA-4, a negative regulator of T cell function, was found to associate with the T cell receptor (TCR) complex zeta chain in primary T cells. The association of TCRzeta with CTLA-4, reconstituted in 293 transfectants, was enhanced by p56(lck)-induced tyrosine phosphorylation. Coexpression of the CTLA-4-associated tyrosine phosphatase, SHP-2, resulted in dephosphorylation of TCRzeta bound to CTL...
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Inhibitory effects of CD152 (CTLA-4) engagement during T cell activation have been described. To date, such effects could only be correlated to CD152 expression at the population level because expression of CD152 on the cell surface is too low to be assessed by conventional immunofluorescence on the single cell level. In this study, we use magnetofluorescent liposomes for the immunofluorescent ...
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ژورنال
عنوان ژورنال: Clinical and Experimental Immunology
سال: 2004
ISSN: 0009-9104,1365-2249
DOI: 10.1111/j.1365-2249.2004.02478.x