原花青素B_2对LPS诱导的心肌细胞凋亡的保护作用  

Procyanidin B_2 protects LPS-induced myocardial cell apoptosis

作　　者：张晓晖[1] 曾繁典[2] 孙智达[3] 杨卓欣[1] 熊益群[1] 徐超英[1] 刘心亮[1] 林坚[1] 穆桂萍[1] 徐绍钢[1] 刘文赫[1] 

机构地区：[1]深圳市中医院中医药研究所,广东深圳518033 [2]华中科技大学同济医学院药理系,湖北武汉430030 [3]华中农业大学食品科学技术学院,湖北武汉430070

出　　处：《中国药理学通报》2015年第11期1510-1515,共6页Chinese Pharmacological Bulletin

基　　金：国家自然科学基金资助项目(No 81101450);深圳市科技研发资金知识创新计划资助项目(No JCYJ20130329155553734)

摘　　要：目的研究原花青素B_2(procyanidin B_2,PCB_2)对脂多糖(lipopolysacchride,LPS)诱导的心肌细胞凋亡的保护作用及其机制。方法采用原代培养新生大鼠心肌细胞,LPS诱导心肌细胞损伤模型,PCB_2低、中、高剂量组分别用含有6.25、12.5、25.0μmol·L^(-1)PCB_2的DMEM培养基持续培养24h。采用四唑盐(MTT)比色法测定心肌细胞存活率,光泽精化学发光法测定心肌细胞NOX的活性,Western blot法分析心肌NADPH氧化酶p47^(phox)亚基的表达,TUNEL法检测细胞凋亡,流式细胞术测定心肌细胞ROS的含量。结果 LPS诱导的细胞损伤组与正常对照组(Control)比较,心肌细胞活力明显降低(P<0.01),而心肌细胞NOX活性、p47^(phox)亚基的表达、凋亡细胞数量以及ROS含量均明显增加(P<0.01)。PCB_2处理后,低、中、高剂量组细胞活力均明显升高,心肌细胞NOX活性、p47^(phox)亚基的表达、凋亡细胞数量以及ROS含量均明显下降,且具有剂量依赖性(P<0.01)。结论 PCB_2通过抑制NADPH氧化酶激活、p47^(phox)的表达以及活性氧的产生发挥对LPS诱导的心肌细胞凋亡的保护作用。Aim To study the mechanisms of the pro-tective effect of procyanidin B2 ( PCB2 ) on the myocar-dial cell apoptosis induced by lipopolysaccharide ( LPS) . Methods Using the primary culture rat myo-cardial cells, myocardial cell injury model was induced by LPS. PCB2 low, medium and high dose groups, were cultured with 6. 25 , 12. 5 , 25. 0 μmol · L-1 PCB2 respectively in DMEM medium for 24 h continu-ously. Myocardial cell survival rate was determined by MTT colorimetric method. Cardiacmyocyte NOX activi-ty was determined by lucigen chemiluminescence meth-od . Western blot analysis was used to detect myocardi-al NADPH oxidase p47phox expression. TUNEL method was used to detect apoptosis and flow cytometry was used to determine the content of myocardial cells ROS. Results Compared with control group, the cell dam-age induced by LPS group myocardial cell survival rate significantly decreased ( P <0. 01 ) , and myocardial cell NOX activity, p47phox expression, apoptotic cell number and ROS content were significantly increased (P<0. 01). PCB2 low, medium and high dose groups cell survival rates were significantly elevated, myocar-dial cell NOX activity and p47phox expression, apoptotic cell number and the ROS content decreased significant-ly in a dose-dependent manner ( P <0. 01 ) . Conclu-sion PCB2 protects myocardial cell apoptosis induced by LPS via inhibiting the expression of NADPH oxidase activation, p47phox expression and reactive oxygen spe-cies generation.

关 键 词：原花青素B2 脂多糖 心肌细胞 凋亡 NADPH氧化酶 活性氧自由基 

分 类 号：R-332[医药卫生] R284.1