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作 者:叶锦霞[1] 梁日欣[1] 王岚[1] 杨滨[1] 安荣姝[2]
机构地区:[1]中国中医科学院中药研究所,北京100700 [2]中日友好医院临床医学研究所,北京100700
出 处:《中国中药杂志》2008年第21期2513-2517,共5页China Journal of Chinese Materia Medica
基 金:科技部国际合作项目(十一五科技计划)(2006DFB31720)
摘 要:目的:观察红花水提物对氧化低密度脂蛋白(ox-LDL)致体外培养大鼠乳鼠心肌微血管内皮细胞损伤的保护作用,并初步探讨其抗氧化作用机制。方法:采用第3代大鼠乳鼠心肌微血管内皮细胞,用红花水提物预处理(500,100,20 mg.L-1)24 h后,ox-LDL(100 mg.L-1)孵育24 h进行损伤,实验结束后取上清液,测定细胞上清液中乳酸脱氢酶(LDH)、丙二醛(MDA)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、一氧化氮(NO)、一氧化氮合酶(NOS)和黄嘌呤氧化酶(XOD)活性,用自旋捕集技术结合电子自旋共振波谱技术(electron spin resonance,ESR)检测各组细胞悬液中氧自由基信号的强弱。结果:红花水提物各剂量组能够明显减少内皮细胞LDH的释放,降低培养液中MDA含量和XOD的活性,同时提高SOD,NO,NOS和GSH-Px的活性,使细胞悬液中的ESR自由基信号明显减弱。结论:红花水提物具有抗ox-LDL致体外培养大鼠乳鼠心肌微血管内皮细胞损伤的作用,其机制与其减少氧自由基产生、增强自由基的清除、增强内源性抗氧化剂的活性,使高毒性的自由基转化成无害物质等有关。Objective: To observe the antioxidant effects of water extract of Carthamus tinctorius on ox-LDL induced injury in rat cardiac microvascular endothelial cell and detecting oxygen derived free radicals (OFR) to explore the antioxidant mechanisms. Method: By using the third generation of rat cardiac microvascular endothelial cells (rCMEC), the protection of water extract of C. tinctorius was investigated after ox-LDL ( 100 mg·L^-1 ) induced damage. The supernatant was collected for detecting lactate dehydro-genase (LDH), malondialdehvde (MDA), superoxide dismutase (SOD), xanthine oxidase (XOD), glutathione peroxidase (GSH- Px), nitric oxide ( NO), nitric oxide synthase (NOS) activity, and cell suspension was collected for detecting reactive oxygen species (ROS) by electron spin resonance (ESR). Result: Water extract of C. tinctorius increased the rCMEC survival rate, reduced LDH, MDA and XOD levels, and improved SOD, GSH-Px and NOS activity, while in the cell suspension ROS signal decreased significantly. Conclusion: Water extract of C. tinctorius has antioxidation. The mechanisms are likely related with scavenging of free radicals, enhancing its clearance, enhancing endogenous antioxidant activity.
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