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  • Title: A spontaneous hybridoma producing autoanti-idiotypic antibodies that recognize a V kappa-associated idiotope in mercury-induced autoimmunity.
    Author: Guéry JC, Druet P.
    Journal: Eur J Immunol; 1990 May; 20(5):1027-31. PubMed ID: 2113472.
    Abstract:
    Anti-idiotypic (Id) antibodies have been suggested to play a role in the self regulation process observed in Brown-Norway rats developing mercury-induced autoimmunity. However, the presence of such antibodies has not yet been directly demonstrated. For that purpose, spleen cells from a mercury-injected rat were fused and the resulting hybridomas tested for their anti-Id activity against monoclonal anti-glomerular basement membrane (GBM) antibodies produced in this model. A monoclonal antibody (mAb) was obtained that specifically reacted in an enzyme-linked immunosorbent assay with an anti-GBM mAb and to a much lesser extent with another one produced in the same fusion. In Western blot experiments this autoanti-Id mAb reacted under reducing conditions with the kappa L chains but not with the H chains of the two anti-GBM mAb. It did not react with the kappa L chains of eight other rat mAb. This mAb is therefore an autoanti-Id mAb that recognizes a V kappa-associated Id expressed on two anti-GBM mAb. These results demonstrate that anti-GBM antibodies and their corresponding autoanti-Id antibodies are simultaneously produced during this disease. Whether or not these autoanti-Id antibodies have a regulatory and/or a pathogenic role in this disease remains to be established.
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