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• W2135997557 endingPage "648" @default.
• W2135997557 startingPage "639" @default.
• W2135997557 abstract "The T cell receptor repertoire has a potential for vast diversity. However, this diversity is limited by the fact that the majority of thymocytes die as the repertoire is shaped by positive and negative selection events during development. Such thymic selection affecting TCR V beta gene segment usage has been demonstrated in the mouse. However, similar data has not been forthcoming in man, and little is known about the role of the TCR alpha chain in antigen/major histocompatibility complex (MHC) recognition in any species. Here, we used a monoclonal antibody recognizing the TCR V alpha 12.1 gene product to assess the expression of this gene in the peripheral blood of man. In most individuals tested, the percentage of cells expressing V alpha 12.1 was significantly higher in CD8+ T cells than in CD4+ T cells. That the V alpha gene product itself was responsible for this increased expression in CD8+ T cells was underscored by the lack of substantial skewing of V beta usage in the V alpha 12.1-bearing T cells. Moreover, the skewed expression of V alpha 12.1 was already present at birth, indicating that it was likely to be due to a developmental process rather than the result of exposure to environmental antigens. Based on the established role for CD8 in binding to class I MHC molecules, we suggest that increased expression of V alpha 12.1 on CD8+ T cells points to a role for TCR's using V alpha 12.1 in class I MHC/Ag recognition. These results indicate that V alpha gene usage in the peripheral blood of man is not random, and they support a role for V alpha as a participant in the self-MHC recognition process that shapes the TCR repertoire." @default.
• W2135997557 created "2016-06-24" @default.
• W2135997557 creator A5000815014 @default.
• W2135997557 creator A5033114948 @default.
• W2135997557 date "1991-09-01" @default.
• W2135997557 modified "2023-09-27" @default.
• W2135997557 title "Increased frequency of T cell receptor V alpha 12.1 expression on CD8+ T cells: evidence that V alpha participates in shaping the peripheral T cell repertoire." @default.
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• W2135997557 doi "https://doi.org/10.1084/jem.174.3.639" @default.
• W2135997557 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2119014" @default.
• W2135997557 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/1940806" @default.
• W2135997557 hasPublicationYear "1991" @default.
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