Reciprocalcation of caveolin and HSP-72 on IPC interceded cardio-protection in the orchidectomized rats
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Caveolin, Testosterone, Ischemic preconditioning, Heart rate, Oxidative stress
Abstract
Diminished testosterone levels conjoined to cardiovascular risk factor mainly myocardial infarction which broadens the risk of cardiovascular mortality referring to age. Ischemic preconditioning (IPC) is one of the interventions to shield such injury. The present study implicated the possible involvement of caveolin and heat shock protein 72 (HSP-72) during stress in orchidectomy (OCD) challenged rats. OCD was performed in male rats and kept for 6 weeks to observe the reduction in the level of testosterone. Isolated perfused heart of normal and OCD group was subjected to ischemic insult as per IPC cycle. Myocardial infarct size, haemodynamic, enzymatic and oxidative stress parameter were assessed for each heart. Diadzein (DDZ) a caveolin inhibitor was administered before the isolation of heart and it significantly decreases myocardial infarct size, release of lactate dehydrogenase, creatinine kinase and oxidative stress marker. DDZ also potentiated the effect IPC-mediated increase in the heart rate and coronary flow. The effect of caveolin inhibitor was remarkably reduced by quercetin administered before 1 h. of the administration DDZ. The findings of this study revealed that protection of myocardium induced by caveolin inhibitor pretreatment has not been lost in OCD rat heart.
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