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• W2040596770 abstract "Three-color automated flow cytometry was carried out on peripheral blood CD4+ and CD8+ T-lymphocytes of 42 HIV-positive patients using tri-color anti-CD4 or anti-CD8, phycoerythrin-anti-CD38, and fluorescein-anti-HLA-DR, mAbs to elucidate further the T-cell activation hypothesis recently proposed to explain CD4+ T-cell abnormalities observed during HIV infection. CD4+ CD38+ T-cells constituted the major part of circulating CD4+ T-cells in HIV-infected patients and their HLA-DR molecule positivity increased as their disease progressed. The level of CD38 and HLA-DR expression on CD4+ T-cells was positively correlated to that of CD8+ T-cells and to the level of beta 2-microglobulin. Next, to determine whether CD38 expression was associated with a selective expansion or deletion of V beta gene-defined subsets, we compared the V beta gene frequencies between CD38+ and CD38- T-cells from HIV-infected CDC stage II patients using 13 mAbs specific to V beta families. While selective expansion of certain V beta families was observed in CD4+ and CD8+ T-cells the T-cell receptor V beta subset distribution was similar among CD38+ and CD38-, CD4+ and CD8+ T-cells, suggesting that CD38+ expression was either independent of an HIV-encoded antigen-driven process or rather indicative of T-cell immaturity. It is proposed that the phenotype of circulating CD4+ and CD8+ T-cells of HIV-infected patients is a feature of two different mechanisms: (i) an in vitro activation state responsible for increased DR expression and selective expansion of V beta gene-defined subsets, and (ii) T-cell immaturity due to an increased turnover of these cells and accounting for increased CD38 expression." @default.
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• W2040596770 date "1995-10-01" @default.
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• W2040596770 title "During HIV Infection, CD4+ CD38+ T-cells are the predominant circulating CD4+ subset whose HLA-DR positivity increases with disease progression and whose Vβ repertoire is similar to that of CD4+ CD38− T-cells+" @default.
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• W2040596770 doi "https://doi.org/10.1016/0090-1229(95)90134-5" @default.
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