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The Journal of Immunology, Vol 138, Issue 11 3611-3617, Copyright © 1987 by American Association of Immunologists
ARTICLES |
CL Scribner, CT Hansen, DM Klinman and AD Steinberg
The murine "motheaten" (me) mutation has been bred onto the NFS background and combined with the X-linked immunodeficiency (xid) mutation to investigate the effect of the xid-induced B cell maturational block on the widespread immune dysfunction, high levels of autoantibodies, and early mortality found in the motheaten mice. The xid markedly reduced spontaneous IgM secretion by spleen cells, serum IgM, anti-ssDNA antibodies, anti-bromelain-treated-erythrocyte antibodies, and T cell binding (but not thymocytotoxic) antibodies; however, neither phenotype nor mortality was affected, suggesting that other factors are responsible for early death. Marked expansion of the Ly-1+ B cell pool was prevented by xid in the motheaten mouse leaving only a very small population of sIgM-positive B cells. This failure of non-Ly-1+ B cell development in me/me X xid mice suggests that me/me leads to inhibition of non-Ly-1+ B cells and preferential expansion of Ly-1+ B cells in motheaten mice, perhaps as a result of their high levels of maturation and activation factors.
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