Abstract

Prostaglandin effects on the heart include changes in the functional and metabolic state, as well as a reduction of ischemia-induced myocardial injury1 and arrhythmias2. The cellular targets of these effects, however, have not been unambiguously defined. Since prostaglandins act via G protein coupled receptors, it is likely that cardiac tissues express one or several of the five classes of prostaglandin receptors, i. e. EP, IP, DP, FP and TP receptors. We here report a direct inhibitory action of PGE1 on myocardial contractility during β-adrenergic inotropic stimulation, that is likely to be mediated by an E-type prostaglandin receptor (EP3 subtype) leading to inhibition of adenylate cyclase.KeywordsLeft Anterior DescendIschemic Myocardial InjuryReceptor Selective AgonistDirect Inhibitory ActionCardiac SarcolemmaThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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