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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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CD8 is needed for development of cytotoxic T cells but not helper T cells.

A mutant mouse strain without CD8 (Lyt-2 and Lyt-3) expression on the cell surface has been generated by disrupting the Lyt-2 gene using embryonic stem cell technology. In these mice, CD8+ T lymphocytes are not present in peripheral lymphoid organs, but the CD4+ T lymphocyte population seems to be unaltered. Cytotoxic response of T lymphocytes from these mice against alloantigens and viral antigens is dramatically decreased. Proliferative response against alloantigens and in vivo help to B lymphocytes, however, are not affected. These data suggest that CD8 is necessary for the maturation and positive selection of class I MHC restricted cytotoxic T lymphocytes but is not required on any of the intermediate thymocyte populations (CD8+CD4-TcR- or CD4+CD8+TcRlow) during the development of functional class II MHC restricted helper T cells.[1]

References

  1. CD8 is needed for development of cytotoxic T cells but not helper T cells. Fung-Leung, W.P., Schilham, M.W., Rahemtulla, A., Kündig, T.M., Vollenweider, M., Potter, J., van Ewijk, W., Mak, T.W. Cell (1991) [Pubmed]
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