Journal of Experimental Medicine, Vol 149, 993-998, Copyright © 1979 by Rockefeller University Press

ARTICLES

Immunoglobulin subclass-specific immunodeficiency in mice with an X- linked B-lymphocyte defect

RM Perlmutter, M Nahm, KE Stein, J Slack, I Zitron, WE Paul and JM Davie

CBA/N mice express an X-linked deficiency in their antibody response to many bacterial carbohydrates; we have shown recently that these antigens normally elicit antibody responses predominantly of the IgM and IgG3 isotypes. Here we demonstrate that mice, with the CBA/N phenotype have perferential deficiencies of IgM and IgG3 immunoglobulin expression, both when measured in serum and in cells secreting these isotypes, and that this deficiency is only partially corrected by polyclonal activation of B cells. This suggests that CBA/N mice may lack a subpopulation of B cells that contain most of the IgG3 precursors.
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