›› 2018, Vol. 45 ›› Issue (1): 100-105.doi: 10.16431/j.cnki.1671-7236.2018.01.013

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Protective Effects of Ginkgo biloba Extract on Oxidative Damage Induced by Heat Stress in Cardiomyocytes of Chicken

CHEN Hongbo1,2, DUAN Dianning1, WANG Hua1,2   

  1. 1. College of Life Sciences, Longyan University, Longyan 364012, China;
    2. Key Laboratory of Preventive Veterinary Medicine and Veterinary Biotechnology, Longyan 364012, China
  • Received:2017-06-29 Online:2018-01-20 Published:2018-01-20

Abstract:

The study was conducted to study the protective effect of Ginko biloba extract (GBE) on oxidative damage in cardiomyocytes of chicken induced by heat stress. The primary cardiomyocytes of 12-day-old AA broiler were prepared,0,5,10,50,100,150 mg/mL GBE were added and the cell vability was tested by CKK-8 method.And then the cardiomyocytes were inoculated and cultured for 48 h in 96-well plates,0,5,10,50,100,200,500 and 1 000 μg/mL GBE were added and the cell apoptosis were studied by Hoechst 33258 method to identify the proper concentration of GBE.The chicken cardiomyocyte heat stress model was established at 42℃ for 0,0.5,1,2 and 4 h,respectively. The LDH,GSH-Px,MDA and SOD were measured by ELISA method.Western blotting was used to detect the expression of Hsp72 protein.The results showed that high concentration of GBE was cytotoxic and 50,100,150 mg/mL GBE could extremely significantly inhibit cell growth (P<0.01),and cell proliferation rate was extremely significantly increased by 50 μg/mL GBE (P<0.01).Heat stress could induce cell apoptosis and oxidative damage through increasing the levels of MDA and LDH and reducing the GSH-Px level and SOD activity. GBE could reduce the levels of LDH and MDA and increase the SOD activity and GSH-Px level after heat stress,and the effect was more obvious when heat stress for 2 and 4 h. Furthermore,Western blotting results showed that GBE enhanced the expression of Hsp72.In conclusion,GBE could protect cardiomyocytes from oxidative damage induced by heat stress by increasing activities of antioxidative enzymes and Hsp72 expression.

Key words: Ginkgo biloba extract; cardiomyocytes; heat stress; oxidative damage

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