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. 1988 Dec;74(3):349–354.

Antibodies to beta 1 and beta 2 adrenoreceptors in Chagas' disease.

L Sterin-Borda 1, C Perez Leiros 1, M Wald 1, G Cremaschi 1, E Borda 1
PMCID: PMC1542036  PMID: 2853016

Abstract

Evidence accumulated over the last decade concerning human and experimental models suggests that an immunopathological mechanism may be involved in the pathogenesis of chronic Chagas' disease. In this paper we demonstrate the existence of two different circulating IgG in chagasic patients which bind with myocardial beta 1 and spleen cell beta 2 adrenoceptors, acting as non-competitive inhibitors. Both chagasic IgG against beta 1 and beta 2 adrenoceptor increased intracellular levels of cAMP that could be blocked by specific beta 1 and beta 2 adrenoceptor antagonists. The specificity for beta 1 and beta 2 adrenoceptors and the independence of other tissue reactive antibodies was demonstrated by IgG absorption with turkey red blood cell (TRBC), human lymphocytes (HL) or guinea pig red blood cells (GPRBC). The F(ab')2 fraction acted similarly. This supports the specificity of beta 1 and beta 2 adrenoceptors to the chagasic IgG and the independence of the other tissue reactive antibodies, such as EVI system. The probable pathogenic role of both beta 1 and beta 2 adrenergic chagasic antibody is discussed.

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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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