The Journal of Immunology, Vol 146, Issue 2 507-514, Copyright © 1991 by American Association of Immunologists

ARTICLES

Anti-idiotypic antibody response to monoclonal anti-CD4 preparations in nonhuman primate species

R Attanasio, JS Allan, SA Anderson, TC Chanh and RC Kennedy
Department of Virology and Immunology, Southwest Foundation for Biomedical Research, San Antonio, TX 78228-0147.

A series of mouse monoclonal anti-CD4 preparations was characterized for the ability to recognize overlapping epitopes on CD4 and to inhibit HIV/simian immunodeficiency virus (SIV) syncytium formation. Based on this characterization, mAb able to recognize CD4 epitopes overlapping the HIV binding site were selected and used to immunize nonhuman primates to elicit the production of specific anti-Id antibodies. Five baboons and five rhesus monkeys were immunized with either individual or a cocktail consisting of several monoclonal anti-CD4 preparations. All the nonhuman primates produced specific anti-Id that recognized either private or cross-reactive Id depending on the monoclonal anti- CD4 used to generate the anti-Id response. Inhibition assays were performed to ascertain the ability of: 1) soluble CD4 to inhibit the Id- anti-Id reaction and 2) the various anti-Id to inhibit the CD4- monoclonal anti-CD4 reaction. These studies demonstrated that some of the anti-Id recognized a cross-reactive Id that was associated with the Ag-combining site. In addition, some of the anti-Id weakly recognized SIV gp120 by Western blot analysis. These studies may be useful in designing experiments that may lead to a better understanding of the CD4-HIV gp120 interaction and to the production of Id and/or anti-Id reagents that might be used to manipulate this virus-receptor interaction.

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