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Negative inotropic effect of chagasic IgG mediated by nitric oxide
A Vila Echagüe1, L Sterin-Borda
1Pharmacology Department, University of Buenos Aires, Argentina.
Acta Physiologica, Pharmacologica Et Therapeutica Latinoamericana : Organo De La Asociacion Latinoamericana De Ciencias Fisiologicas Y [De] La Asociacion Latinoamericana De Farmacologia
|January 1, 1996
Abstract:
In this paper we analyse the interaction of IgG from T. cruzi infected patients with cardiac muscarinic acetylcholine receptors (mAChRs). Human chagasic IgG, activating M2 mAChR simulated the agonist actions excerting negative inotropic effect and stimulation of nitric oxide synthase (NOS). Inhibitors of phospholipase C, protein kinase C, calcium/calmodulin, NOS and guanylate cyclase activities prevented the chagasic effects upon contractility and NOS activity.