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The Journal of Immunology, Vol 130, Issue 4 1634-1639, Copyright © 1983 by American Association of Immunologists

ARTICLES

Presence of circulating anti-idiotype-bearing cells after booster immunization with tetanus toxoid (TT) and inhibition of anti-TT antibody synthesis by auto-anti-idiotypic antibody

RS Geha

We have previously documented the appearance of auto-anti-idiotypic (anti-Id) antibody in the serum of normal subjects after booster immunization with tetanus toxoid (TT) antigen. In the present study circulating auto-anti-Id-bearing cells and the regulatory role of auto- anti-Id antibody on anti-TT antibody synthesis were examined. Two adult volunteers were boosted with TT antigen, and IgG (Fab')2 anti-TT was prepared from plasma obtained 7 and 10 days after boosting. Auto-anti- Id antibody directed against autologous IgG (Fab')2 anti-TT became detectable in the serum starting 2 wk and up to 4 mo after booster immunization with TT. Circulating cells capable of specifically binding fluorescein-conjugated autologous IgG (Fab')2 anti-TT were identified starting 3 wk after immunization and throughout the 3- to 4-mo study period. Auto-anti-Id-bearing cells were predominantly B cells and secreted auto-anti-Id antibody after stimulation with pokeweed mitogen (PWM) in vitro. When added to cultures of peripheral blood lymphocytes (PBL) obtained 10 days after immunization, serum auto-anti-Id antibody inhibited the PWM-induced synthesis of IgG anti-TT. This inhibition was idiotype specific and affected predominantly the synthesis of anti-TT idiotypes recognized by the auto-anti-Id antibody. Auto-anti-Id antibody did not affect the synthesis of IgG anti-TT by PBL that co- circulated with the auto-anti-Id antibody. These results suggest that auto-anti-Id antibodies play a role in the regulation of the normal human immune response.




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