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Protective effects of caspase-9 and poly(ADP-ribose) polymerase inhibitors on ischemia-reperfusion-induced myocardial injury

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Abstract

The present study was designed to investigate the cardio-protective effect of Ac-LEDH-cmk a selective caspase-9 inhibitor and 5-aminoisoquinolinone a selective Poly (ADP-ribose) polymerase inhibitor on ischemia and reperfusion induced apoptotic and necrotic cell death in rats. Isolated rat hearts were exposed to 30 minutes of global ischemia followed by 120 minutes of reperfusion using Langendorff’s apparatus. Myocardial injury was assessed in the terms of infarct size, release of lactate dehydrogenase, creatine kinase enzymes and apoptotic index was assessed by DNA smearing on agarose gel electrophoresis. Pretreatments with specific inhibitor of caspase-9, Ac-LEHD-cmk (0.07 μM and 0.105 μM), and inhibitor of PARP, 5-aminoisoquinolinone (5 μM and 7.5 μM), significantly attenuated I/R induced increase in infarct size, release of lactate dehydrogenase and creatine kinase in the coronary effluent, and apoptotic index. Therefore, it may be concluded that inhibition of caspase-9 and PARP prevent ischemia and reperfusion-induced activation of apoptotic cascade and necrosis in rat myocardium.

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Authors and Affiliations

  1. ASBASJS College of Pharmacy, Bela (Ropar), Punjab, India

    Rupinder K. Sodhi

  2. Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, 147002, Punjab, India

    Manjeet Singh, Nirmal Singh & Amteshwar S. Jaggi

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  1. Rupinder K. Sodhi
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  2. Manjeet Singh
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  3. Nirmal Singh
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  4. Amteshwar S. Jaggi
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Correspondence to Nirmal Singh.

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Sodhi, R.K., Singh, M., Singh, N. et al. Protective effects of caspase-9 and poly(ADP-ribose) polymerase inhibitors on ischemia-reperfusion-induced myocardial injury. Arch. Pharm. Res. 32, 1037–1043 (2009). https://doi.org/10.1007/s12272-009-1709-9

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  • DOI: https://doi.org/10.1007/s12272-009-1709-9

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