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Simvastatin and vitamin E effects on cardiac and hepatic oxidative stress in rats fed on high fat diet

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Abstract

High fat diet (HFD) is a common cause of metabolic syndrome and type 2 diabetes mellitus. Published data showed that HFD and subsequent dyslipidemia are major triggers for oxidative stress. Forty-eight male Sprague–Dawley rats, weighing 170–200 g, were divided into six groups: control, control with vitamin E (100 mg/kg/day, i.p.), control with simvastatin (SIM) (10 mg/kg of body weight/day), HFD, HFD with vitamin E, and HFD with SIM. Standard and high cholesterol diets were given for 15 weeks and SIM and vitamin E were added in the last 4 weeks. In all rats, serum vitamin E, total cholesterol (TC), triglycerides (TG), low (LDL) and high (HDL) density lipoproteins, alanine (ALT) and aspartate (AST) transaminases, alkaline phosphatase (ALP), and gamma glutamyl transpeptidase (GGT) as well as cardiac and hepatic thiobarbituric acid-reactive substances (TBARS) and antioxidants (reduced glutathione (GSH), superoxide dismutase (SOD), and catalase (CAT)) were measured. Also, electrocardiogram (ECG) was recorded. HFD significantly increased QTc interval, heart rate (HR), serum TC, TG, LDL, ALT, AST, ALP, GGT, liver TG, and cardiac and hepatic TBARS but decreased antioxidants and HDL, while SIM decreased HR, liver TG, serum TC, TG, and LDL and increased HDL in HFD rats. Vitamin E had no effect. Moreover, SIM and vitamin E decreased QTc interval, serum ALT, AST, ALP, GGT, and cardiac and hepatic TBARS and increased antioxidants in HFD rats. Histopathological observations confirm the biochemical parameters. SIM and vitamin E slow progression of hypercholesterolemia-induced oxidative stress in liver and heart and improve their functions.

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Acknowledgments

The authors thank Dr. Asem Shalaby, Lecturer of Pathology, Pathology Department, College of Medicine, Mansoura University, Mansoura, Egypt for his assistance in histopathological studies.

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Authors and Affiliations

  1. Medical Physiology Department, Faculty of Medicine, Mansoura University, PO Box: 35516, Mansoura, Egypt

    Amr M. Abbas & Hussein F. Sakr

  2. Medical Physiology Department, College of Medicine, King Khalid University, Abha, Saudi Arabia

    Hussein F. Sakr

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  1. Amr M. Abbas
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  2. Hussein F. Sakr
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Correspondence to Hussein F. Sakr.

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Abbas, A.M., Sakr, H.F. Simvastatin and vitamin E effects on cardiac and hepatic oxidative stress in rats fed on high fat diet. J Physiol Biochem 69, 737–750 (2013). https://doi.org/10.1007/s13105-013-0250-y

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  • DOI: https://doi.org/10.1007/s13105-013-0250-y

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