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Atorvastatin alleviates experimental diabetic cardiomyopathy by suppressing apoptosis and oxidative stress

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Abstract

Diabetic hazard on the myocardium is a complication of diabetes that intensifies its morbidity and increases its mortality. Therefore, alleviation of diabetic cardiomyopathy (DCM) by a reliable drug remains a matter of interest in experimental research. The aim of this study was to explore the structural alterations in the myocardium induced by atorvastatin (ATOR) in DCM, induced by streptozotocin (STZ), along with the associated changes occurring in apoptosis and oxidative stress markers. Thirty-two rats were divided into four groups; group A (control), group B (non-diabetic, received ATOR, orally, 50 mg/kg daily), group C (DCM, received STZ 70 mg/kg, single i.p. injection) and group D (DCM + ATOR). After 6 weeks, left ventricle (LV) specimens were prepared for histological and immunohistochemical study by hematoxlyin and eosin, Masson`s trichrome, anti-cleaved caspase-3 stains as well as for assays of oxidative stress markers. All data were measured morphometrically and statistically analyzed. The DCM group showed disorganization of the cardiomyocytes, interstitial edema, numerous fibroblasts, significant increases in the collagen volume fraction (p < 0.001), cleaved caspase-3 expression % area (p < 0.001) and, malondialdehyde in blood (p < 0.001), in LV (p < 0.05) compared with DCM + ATOR group. The latter has LV wall thickness, relative heart weight and antioxidant activities nearly similar to the control, independent from ATOR lipid-lowering effect. Therefore, ATOR can preserve myocardial structure in DCM nearly similar to normal. This may be achieved by suppressing apoptosis that parallels the correction of the antioxidant markers, which can be considered as non-lipid lowering benefit of statins.

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Authors and Affiliations

  1. Department of Histology and Cell Biology, Faculty of Medicine, Mansoura University, P.O. 35516, Mansoura, Egypt

    Ahmed A. M. Abdel-Hamid & Alaa El-Din L. Firgany

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  1. Ahmed A. M. Abdel-Hamid
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  2. Alaa El-Din L. Firgany
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Correspondence to Ahmed A. M. Abdel-Hamid.

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Abdel-Hamid, A.A.M., Firgany, A.ED.L. Atorvastatin alleviates experimental diabetic cardiomyopathy by suppressing apoptosis and oxidative stress. J Mol Hist 46, 337–345 (2015). https://doi.org/10.1007/s10735-015-9625-4

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  • DOI: https://doi.org/10.1007/s10735-015-9625-4

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