Possible mechanism of the negative inotropic effect of alpha1-adrenoceptor agonists in rat isolated left atria after exposure to free radicals

Autor: Peters, S. L., Batink, H. D., Michel, M. C., Pfaffendorf, M., van Zwieten, P. A.
Přispěvatelé: Other departments
Jazyk: angličtina
Rok vydání: 1998
Zdroj: British journal of pharmacology, 123(5), 952-958. Wiley-Blackwell
ISSN: 0007-1188
Popis: 1. This study was designed to investigate the mechanism(s) of the negative inotropic effects of alpha1-adrenoceptor agonists observed in rat isolated left atria after exposure to free radicals. 2. Ouabain and calphostin C were used in contraction experiments to block the sodium pump and protein kinase C. Methoxamine-induced phospholipase C and Na+/K+ ATPase activities were measured. 3. Methoxamine (300 microM) increased contractile force by 1.6 +/- 0.2 mN in control atria but decreased contractile force in electrolysis-treated atria by 2.0 +/- 0.1 mN (P
Databáze: OpenAIRE