Mechanisms involved in attenuated cardio-protective role of ischemic preconditioning in metabolic disorders

Author:

Rana A1,Goyal N1,Ahlawat A1,Jamwal S1,Reddy BVK1,Sharma S1

Affiliation:

1. Cardiovascular Division, Department of Pharmacology, I.S.F College of Pharmacy, Moga-142001, Punjab, India

Abstract

Myocardial infarction is a pathological state which occurs due to severe abrogation of the blood supply (ischemia) to a part of heart, which can cause myocardial damage. The short intermittent cycles of sub-lethal ischemia and reperfusion has shown to improve the tolerance of the myocardium against subsequent prolonged ischemia/reperfusion (I/R)-induced injury, which is known as ischemic preconditioning (IPC). Although, IPC-induced cardioprotection is well demonstrated in various species, including human beings, accumulated evidence clearly suggests critical abrogation of the beneficial effects of IPC in diabetes mellitus, hyperlipidemia and hyperhomocysteinemia. Various factors are involved in the attenuation of the cardioprotective effect of preconditioning, such as the reduced release of calcitonin gene-related peptide (CGRP), the over-expression of glycogen synthase kinase-3β (GSK-3β) and phosphatase and tensin homolog (PTEN), impairment of mito-KATP channels, the consequent opening of mitochondrial permeability transition pore (MPTP), etc. In this review, we have critically discussed the various signaling pathways involved in abrogated preconditioning in chronic diabetes mellitus, hyperlipidemia and hyperhomocysteinemia. We have also focused on the involvement of PTEN in abrogated preconditioning and the significance of PTEN inhibitors.

Publisher

SAGE Publications

Subject

Advanced and Specialised Nursing,Cardiology and Cardiovascular Medicine,Safety Research,Radiology Nuclear Medicine and imaging,General Medicine

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