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In vivo antioxidant activity and its protective effects of green tea extract
on acute myocardial infarction

Rinkiko Suguro, Bo Wei, Ying Wang, Renqiang Li, Sheng Xiong*   

  1. 1. Guangdong Provincial Key Laboratory of Bioengineering Medicine, National Engineering Research Center of Genetic Medicine, Jinan University, Guangzhou 510632, China
    2. Biomedical R&D Center, Institute of Biomedicine, Jinan University, Guangzhou 510632, China
    3. Department of Bioengineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
  • Received:2012-10-30 Revised:2012-11-26 Online:2013-07-10 Published:2013-07-10
  • Contact: Sheng Xiong*

Abstract:

The antioxidant activity and its protective effects of Green Tea Extract (GTE) from a Chinese green tea, Hangzhou Longjing, on acute myocardial infarction (AMI) were investigated in rats. Blood, liver and heart were collected to perform DNA damage test, hepatic antioxidant test, gene expression as well as capillary distribution study. A well-known angiotensin II type 1 receptor antagonist, Losartan was used as control. It was found there were significant reductions in certain DNA damage products' levels in GTE and Losartan treated groups compared to saline-treated group. In addition, significant increases in antioxidant enzyme activities and antioxidant gene expressions were observed in GTE and Losartan treated groups. Morphological study also demonstrated the cardioprotective effects of GTE on AMI. In conclusion, GTE has potent and similar cardioprotective effect as Losartan that may due to its ability to scavenge free radicals.

Key words: Myocardial infarction, Green Tea Extract, Antioxidant activity, Cardioprotective effects, In vivo, Losartan

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