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. 1982 May;69(5):1147–1154. doi: 10.1172/JCI110550

An antiidiotypic antibody that recognizes the beta-adrenergic receptor.

C J Homcy, S G Rockson, E Haber
PMCID: PMC370179  PMID: 6279698

Abstract

Antialprenolol rabbit antibodies were fractionated on an acebutolol affinity resin, followed by L-propranolol elution so as to separate a class of binding sites that mimic the beta-adrenergic receptor. Allotype-identicaL rabbits were immunized with this fraction. After 6 mo, antisera exhibited antiidiotypic activity inhibiting [3H]alprenolol binding to the original antibody and to rabbit antiacebutolol antibodies, which had a spectrum of ligand-binding properties identical to the original idiotype. Those antisera demonstrating the original idiotype. Those antisera demonstrating the most potent antiidiotypic activity also blocked [3H]alprenolol binding to the beta-adrenergic receptor of turkey membrane, canine pulmonary membrane, and rat reticulocyte. An idiotype affinity-purified fraction showed similar activity, inhibiting beta-receptor binding with a calculated dissociation constant (KD) of 53 nM. Isoproterenol-mediated adenylate cyclase activity was also inhibited in a competitive manner. The universality of recognition of these antiidiotypic antisera indicate that the three-dimensional structure of a receptor's binding site can be modeled by a subset of an elicited antibody population.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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