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Chinese Journal of Clinical Pharmacology and Therapeutics ›› 2009, Vol. 14 ›› Issue (10): 1137-1141.

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Effect of extracellular signal-regulated kinase on apoptosis of pneumocyte during lung ischemic and reperfusion injury in rats

HONG Jia-lin1, ZHENG Yan-rong2, SHI Lu3, JIA Xu-guang3, WANG Wan-tie3   

  1. 1People' s Hospital of Yongjia, Wenzhou 325100, Zhejiang, China;
    2Center for Disease Prevention and Control of Wenzhou, Wenzhou 325000, Zhejiang, China;
    3Department of Pathophysiology, Wenzhou Medical College, Wenzhou 325035, Zhejiang, China
  • Received:2009-08-14 Revised:2009-10-07 Published:2020-10-29

Abstract: AIM: To explore the effect of extracellular signal-regulated kinase (ERK) on apoptosis of pneumocyte during lung ischemic and reperfusion injury in rats. METHODS: 30 rats were randomly divided into three groups:control group(Group C), lung ischemia- reperfusion injury group(Group I R) and PD98059 group(Group P).The content of MDA in serum, the activity of SOD, cell apoptosis index and the p-ERK protein expression were detected by immunohistochemistry, and the ultrastruction changes of lung were observed by electron microscope. RESULTS: Compared with Group C, the content of MDA was increased, the content of SOD was decreased remarkably (all P < 0.01), the expression of p-ERK protein was increased remarkably (P <0.01), and the apoptosis index (AI) was increased in Group I R (P <0.01), abnormal changes of the lung tissue in morphology were observed in Group I R.After PD98059 treatment, the content of MDA was increased (P <0.01), the content of SOD was decreased (P <0.05), the expression of p-ERK protein was decreased(P <0.01), the value of AI was increased(P <0.01), the abnormal changes of the lung tissue in morphology were aggravated markedly. CONCLUSION: The ERK signal transduction pathway maybe protect the lung from the injury caused by ischemia and reperfusion through lessening apoptosis of lung cells in rats.

Key words: lung, reperfusion injury, erk, PD98059, apoptosis

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