Epstein-Barr virus-transformed B cells bearing idiotypes of anti-DNA autoantibodies |
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Authors: | Osamu Takai Takeshi Sasaki Tai Muryoi Eiichi Tamate Kaoru Yoshinaga Hiroshi Sano |
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Affiliation: | (1) Second Department of Internal Medicine, Tohoku, University School of Medicine, 1-1, Seiryocho, 980 Sendai, Japan;(2) Institution Biotechnologicum Akita, Akita, Japan |
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Abstract: | Epstein-Barr virus (EBV)-transformed B cells obtained from healthy subjects had the same idiotypes of anti-DNA autoantibodies on their surface as those obtained from patients suffering from systemic lupus erythematosus. These clones secreted anti-single-stranded or antidouble-stranded DNA antibodies. Among them, some produced anti-DNA idiotype-positive antibodies but failed to bind DNA. This was confirmed by a competitive inhibition radioimmunoassay. It was then considered whether or not the expression of anti-DNA idiotype on B-cell clones related to the anti-DNA antibody activityin vivo. The amounts of anti-DNA antibodies were not associated with the incidence of idiotype-positive B cells in the EBV-transformed cell lines from normals. The results indicate that the clones committed to the synthesis of anti-DNA idiotype-positive antibodies commonly exist at a resting state in the circulation of healthy subjects, probably through the self-tolerance regulatory system. |
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Keywords: | Anti-DNA antibody idiotype B-cell clone systemic lupus erythematosus (SLE) |
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