Anti-DNA antibodies from autoimmune mice arise by clonal expansion and somatic mutation.
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摘要：
The proximate cause of autoantibodies characteristic of systemic autoimmune diseases has been controversial. One hypothesis is that autoantibodies are the result of polyclonal nonspecific B cell activation. Alternatively, autoantibodies could be the result of antigen-driven B cell activation, as observed in secondary immune responses. We have approached this question by studying monoclonal anti-DNA autoantibodies derived from unmanipulated spleen cells of the autoimmune MRL/lpr mouse strain. This analysis shows that anti-DNAs, like rheumatoid factors (19), are the result of specific antigen-driven stimulation. In addition, correlation of sequences with fine specificity shows that: (a) somatic mutations can cause specificity for dsDNA and that such mutations are selected for; (b) arginine residues play an important role in determining specificity; and (c) anti-idiotypes that recognize the majority of anti-DNA are probably not specific for any one family of V regions.
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关键词：
Clone Cells Animals Mice, Inbred Strains Mice Mice, Mutant Strains Autoimmune Diseases Immunoglobulin Joining Region Immunoglobulin Variable Region DNA DNA, Single-Stranded
DOI：
10.1084/jem.171.1.265
被引量：
年份：
1990
BMJ
万方医学
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