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CJAP ›› 2017, Vol. 33 ›› Issue (4): 308-313.doi: 10.12047/j.cjap.5531.2017.075

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Effect of adiponectin postconditioning against myocardial ischemia/reperfusion injury in rats and role of ADP/PI3K/Akt pathway in adiponectin postconditioning

ZHAO Lin-jing1, CUI Liu-su1, ZHANG Jin-ying2, WANG Yong-ling1   

  1. 1. School of Basic Medicine, Xinxiang Medical University, Xinxiang 453003;
    2. Department of Vasculocardiology, First Affiliated Hospital, Zhengzhou University, Zhengzhou 450000, China
  • Received:2016-11-28 Revised:2017-05-15 Online:2017-07-28 Published:2018-06-19
  • Supported by:
    新乡医学院博士科研启动基金资助(XYBSKYZZ 201634)

Abstract: Objective: To investigate the effects of adiponectin(ADP) postconditioning against myocardial ischemia/reperfusion injury(MIRI) in rats and role of ADP/PI3K/Akt pathway in ADP postconditioning.Methods: SD rat was connected to ventilator by tracheal intubation under anesthesia, then left anterior descending coronary artery (LAD) was threaded between left auricle and pulmonary artery cone after exposing heart by surgery. MIRI model was induced by ligation of LAD for 30 min and the following reperfusion for 120 min. Rats were divided randomly into 5 groups (n=12):① Sham group:LAD was threaded without ligation; ② MIRI group; ③ADP group (ADP postconditioning) were subjected to intravenous injection of ADP when LAD ligation for 10 min and the ligation held for 20 min after that, then reperfusion for 120 min; ④ ADP+LY294002 group were subjected to injection of ADP and LY294002 when LAD ligation for 10 min, the other steps were the same as ADP group; ⑤ LY294002 group were subjected to injection of LY294002 when LAD ligation for 10 min, the other steps were the same as ADP group. Titers of lactate dehydrogenase(LDH) and cardiac troponin I(cTnI) in plasma were observed, expressions of PI3K, Akt, phosphorylated-Akt(p-Akt), ADP mRNA, ADPR1 mRNA and PI3k mRNA in myocardial tissue were measured.Results: Compared with sham group, the levels of LDH and cTnI in MIRI group were increased (P<0.05); Compared with MIRI group, the levels of LDH and cTnI in ADP group were decreased (P<0.05); Compared with ADP group, the levels of LDH and cTnI were increased in LY294002 applying groups(P<0.05). Compared with MIRI group, the expressions of PI3K, p-Akt, ADP mRNA, ADPR1 mRNA and PI3K mRNA were increased in ADP group (P<0.05), the above mentioned 5 parameters in LY294002 applying groups were decreased(P<0.05).Conclusion: ADP postconditioning could reduce MIRI in rats, the protective effect might have relation to ADP/PI3k/Akt pathway.

Key words: adiponectin, ischemic postconditioning, myocardial ischemia/reperfusion injury, signalling pathway, PI3K, p-Akt, rat

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