牛磺酸对高糖诱导H9c2心肌细胞凋亡的影响及其机制  被引量:2

Effects and Mechanisms of Taurine on H9c2 Myocardial Cell Apoptosis Induced by High Glucose

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作  者:张喆[1] 朱宁[2] 刘明琛 沈丽敏[1] 马蓓洁 刘春颖[1] 刘新霞[1] 王恩军[1] 

机构地区:[1]河北大学医学院 [2]保定市第一中心医院 [3]河北大学预防医学与卫生事业管理系,保定071000

出  处:《科学技术与工程》2017年第12期10-13,共4页Science Technology and Engineering

基  金:河北省卫生厅医学科学研究重点课题计划青年科技课题(20120136)资助

摘  要:探讨牛磺酸对高糖诱导H9c2心肌细胞凋亡的影响及其作用机制,以H9c2心肌细胞,分3组:正常对照组(CN组,葡萄糖浓度为5.5 mmol·L^(-1))、高糖组(HG组,葡萄糖浓度为25.5 mmol·L)、牛磺酸干预组(TAU组,葡萄糖浓度为25.5mmol·L^(-1)基础上加终浓度为40 mmol·L^(-1)牛磺酸)。48 h后,采用MTT检测心肌细胞活力,荧光酶标仪检测胞内ROS含量,RT-PCR法检测PI3KmRNA表达量,ELISA法检测磷酸化Akt蛋白(phospho-Akt,p-Akt)蛋白含量,比色法检测Caspase3水平,并采用Annexin-V/PI结合流式细胞仪检测细胞凋亡率。结果:高糖诱导48 h后细胞活力下降(P<0.001),ROS含量升高(P<0.001),PI3KmRNA水平与p-Akt蛋白含量降低(P<0.001),Caspase3活性升高(P<0.001);并伴有凋亡率显著增加(P<0.001);与HG组相比,牛磺酸干预可显著提高细胞活力(P<0.001),降低ROS含量(P<0.001),增加PI3KmRNA表达(P<0.01)与p-Akt蛋白含量(P<0.05),降低Caspase3活性(P<0.001),抑制细胞凋亡(P<0.001)。说明牛磺酸可通过PI3K/Akt途径降低细胞内氧化应激水平和Caspase3活性,抑制高糖诱导H9c2心肌细胞的凋亡。To investigate the effects and mechanisms of taurine on H9c2 cell apoptosis induced by high glucose, H9c2 cells cultured in vitro were divided into three groups : CN group (5.5 mmol·L^-1 glucose) , HG group (25. 5 mmol·L^-1 glucose) and TAU group (25. 5 mmol·L^-1 glucose and 40 mmol·L^-1 taurine) . After 48 h, the cell activity was detected by MTT ; Intracellular ROS levels were detected with microplate readers; Levels of PI3KmRNA and phospho-Akt were respectively detected with RT-PCR and ELISA. The activity of Caspase3 was measured with enzyme-linked colorimetry assay and Annexin V/PI double marking method was used to detect cell apoptosis. High glucose on H9c2 cells can significantly reduce the cell activity (P 〈0. 001) , levels of PI3KmRNA (P 〈0. 001 ) and p-Akt ( P 〈 0. 001 ) , and increase the level of intracellular ROS ( P 〈 0. 001 ) , activity of Caspase3 (P 〈0. 001) and ratio of cell apoptosis (P 〈0. 001) . Compared with the HG group, taurine intervention can increase the cell activity (P 〈0. 0 0 1) , levels of PI3KmRNA (P 〈0. 0 1 ) and p-Akt (P 〈0 . 0 5 ) , and remark-ablely decrease the level of intracellular ROS (P 〈0. 0 0 1 ) , activity of Caspase3 (P 〈0. 0 0 1 ) and ratio of cell apoptosis (P 〈 0. 001) . It is conclued that taurine inhibits the H9c2 cell apoptosis from oxidative stress induced by high glucose, through the PI3K/Akt signaling pathway.

关 键 词:牛磺酸 高糖 H9C2心肌细胞 凋亡 磷脂酞肌醇3激酶 

分 类 号:R318.04[医药卫生—生物医学工程]

 

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