Abstract
Mononuclear cell populations were enumerated in healthy young adults with or without the histocompatibility antigen HLA-B8. Mononuclear cell counts were lower in subjects with HLA-B8, as was reflected in lower absolute numbers of the cell subsets. When cell populations were compared as percentages of total mononuclear cells, subjects with HLA-B8 had significantly more B lymphocytes bearing IgM than did subjects without HLA-B8. The T4 T8 ratio was significantly increased in subjects with HLA-B8, due both to increases in OKT4 + cells and to decreases in OKT8 + cells. B-Lymphocyte function was compared in subjects with and without HLA-B8 by measuring pokeweed mitogen driven differentiation of B cells to IgM bearing blasts, and was significantly greater in subjects with HLA-B8. Subjects with HLA-B8 were also found to have decreased Con A-induced suppression. Alterations in lymphocyte subsets and lymphocyte functions may underlie the predisposition to autoimmunity associated with HLA-B8.
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