Signaling pathways of a structural analogue of apelin-12 involved in myocardial protection against ischemia/reperfusion injury

Peptides
O I PisarenkoOxana M Veselova

Abstract

Exogenously administered chemically modified apelin-12 (MA) has been shown to exhibit protective effects in myocardial ischemia/reperfusion (I/R) injury. They include reduction of ROS formation, cell death and cardiometabolic abnormalities. The aim of the present study was to explore the role of the underlying signaling mechanisms involved in cardioprotection afforded by MA. Isolated perfused working rat hearts subjected to global ischemia and anaesthetized rats in vivo exposed to LAD coronary artery occlusion were used. Myocardial infarct size, cell membrane damage, cardiac dysfunction and metabolic state of the heart were used as indices of I/R injury at the end of reperfusion. Administration of specific inhibitors of MEK1/2, PI3K, NO synthase (NOS) or the mitochondrial ATP-sensitive K(+) (mito KATP) channels (UO126, LY294002, L-NAME or 5-hydroxydecanoate, respectively) reduced protective efficacy of MA in both models of I/R injury. This was evidenced by abrogation of infarct size limitation, deterioration of cardiac function recovery, and attenuation of metabolic restoration and sarcolemmal integrity. An enhancement of functional and metabolic recovery in isolated reperfused hearts treated with MA was suppressed by U-73122, ...Continue Reading

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Citations

Jun 8, 2018·Frontiers in Physiology·Marta B WysockaDorota Nowak
Feb 15, 2021·Biomedicine & Pharmacotherapy = Biomédecine & Pharmacothérapie·Maryam Eskandari MehrabadiSaman Hosseinkhani

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