天然产物研究与开发 ›› 2018, Vol. 30 ›› Issue (2): 299-303.doi: 10.16333/j.1001-6880.2018.2.021

• 开发研究 • 上一篇    下一篇

荭草花醇提物对H2O2诱导的H9c2细胞氧化损伤的保护作用机制研究

刘亭1,吴琼1,3,刘香香1,3,陆定艳1,3,黄文炫1,3,李月婷1,李勇军2*   

  1. 1贵州医科大学 贵州省药物制剂重点实验室;2贵州医科大学 民族药与中药开发应用教育部工程研究中心,贵阳 550004;3贵州医科大学 药学院,贵州 贵阳 550025
  • 出版日期:2018-02-28 发布日期:2018-02-28
  • 基金资助:

    国家自然科学基金(81560630;81760699);贵州省科学技术厅人才团队项目(2016- 5613-5677);贵州省教育厅项目(2013-04)

     

Protective Effect of Flowers of Polygonum orientale Flower Ethanol Extract on H2O2-induced Oxidative Stress Injury in H9c2 Cells

LIU Ting 1, WU Qiong 1,3, LIU Xiang-xiang1,3, LU Ding-yan1,3, HUANG Wen-xuan1, LI Yue-ting1, LI Yong-jun2*    

  1. 1Provincial Key Laboratory of Pharmaceutics in Guizhou Province,Guizhou Medical University; 2Engineering Research Center for the Development and Application of Ethnic Medicine and TCM,Ministry of Education,Guizhou Medical University,Guiyang 550004,Guizhou; 3College of Pharmacy,Guizhou Medical University,Guiyang 550025,Guizhou
  • Online:2018-02-28 Published:2018-02-28

摘要: 研究荭草花醇提物对H9c2心肌细胞氧化损伤的保护作用机制。采用200 μmol/L H2O2作用H9c2细胞0.5 h,建立H9c2细胞氧化损伤模型。将细胞分为正常对照组、H9c2细胞氧化损伤模型组、不同浓度荭草花醇提物(20、40、80 μg/mL)预处理组。采用MTS法检测细胞存活率;生化试剂盒检测细胞乳酸脱氢酶(LDH)释放量,细胞内丙二醛(MDA)含量及超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活力;Western blot测定cleavedcaspase-3、Bcl-2、Bax、p-AKT和AKT的表达。与模型组比较,荭草花醇提物能明显增加心肌细胞存活率,降低LDH释放量和MDA含量,提高SOD及CAT活性,并呈剂量依赖性抑制H2O2诱导的氧化应激损伤。荭草花醇提物下调cleaved caspase-3和Bax的蛋白水平,上调Bcl-2的表达,减少心肌细胞凋亡;增加细胞中p-AKT的表达,且这种表达可被PI3Ks抑制剂LY294002抵消。表明荭草花醇提物可减轻H2O2诱导的H9c2心肌细胞氧化应激损伤,其机制可能与减少细胞凋亡,平衡氧化应激产物有关,且部分依赖于磷脂酰肌醇3-激酶(PI3K/Akt)通路。

关键词: 荭草花醇提物, 氧化应激损伤, H9c2心肌细胞, PI3K/Akt

Abstract: To investigate the protective effect of Polygonum orientale Flower Ethanol Extracton H2O2-induced Oxidative damage in H9c2 Cells.200 μmol/L H2O2 was used to induce the oxidativestress damage model in H9c2 cells for 0.5 h in vitro.The H9c2 cells were randomly divided into control group,the model group(200 μmol/L H2O2)and the Polygonum orientale  Flower ethanol Extract different groups(20、40、80 μg/mL).Cellviability was determined by MTS assay.Thecontentoflactate dehydrogenase (LDH),malondialdehyde (MDA) and the activities of superoxidedimutase (SOD) and catalase (CAT) were detected by biochemical kits.The protein levels of caspase-3,Bax,Bcl-2,p-AKT and AKT were detected by Western blot.Compared with model group, Polygonum orientale   Flower Ethanol Extract pre-treatment improved cell viabilityand the activities of SOD and CAT in a dose-dependent manner,and attenuated leakage of LDH and content of MDA. Polygonum orientale  Flower Ethanol Extract depressed myocardial apoptosis by down-regulating pro-apoptotic protein cleavedcaspase-3 and Bax,up-regulating apoptosis inhibitory protein Bcl-2 and increasing the protein level of p-AKT.LY294002 could offsets such an effect of  Polygonum orientale  Flower Ethanol Extract.In summary, Polygonum orientale  Flower Ethanol Extract showed a protective effect on H2O2 -induced injury in H9c2 cells.This protection may result from inhibiting myocardial oxidative apoptosis,balancing the oxidative stress and maybe related with the PI3K/Akt signaling pathway.

Key words: Polygonum orientale Flower Ethanol Extract, oxidative stress injury, H9c2 cells, PI3K/Akt

中图分类号: 

R96