白藜芦醇苷体外对过氧化氢导致小鼠肝细胞损伤的保护作用

目的　观察中药虎杖的活性成分白藜芦醇苷对过氧化氢 (H2 O2 )所致肝细胞损伤的影响。方法　用邻苯三酚自氧化法测过氧化物歧化酶 ,用硫代巴比妥酸 (TBA)法测丙二醛 (MDA)含量 ,用改良Hafeman方法测还原谷胱甘肽含量 ,用 5 ,5’ 二巯基 2 ,2’ 二硝基苯甲酸 (DTNB)法测谷胱甘肽过氧化物酶活性。谷丙转氨酶 (ALT)、一氧化氮 (NO)和一氧化氮合酶 (NOS)采用测试药盒测定。结果　白藜芦醇苷系列浓度 (0 0 5 ,0 1,0 5 ,1,2 ,4mmol·L-1)作用肝细胞后 ,能显著降低H2 O2 引起的NO和MDA水平升高 ,抑制NOS活性 ,升高SOD和GSH px活性 ,减少GSH消耗 ,明显减少了H2 O2 导致的肝细胞悬液中ALT浓度增高。结论　白藜芦醇苷在一定浓度范围内对H2 O2 所致的小鼠肝细胞氧化损伤具有保护作用。

Protective effects of polydatin on mouse hepatocyte injury induced by hydrogen peroxide in vitro

AIM To investigate the effects of polydatin on mouse hepatocyte injury induced by hydrogen peroxide(H 2O 2). METHODS Mouse hepatocytes were prepared. SOD activity, MDA content, GSH level, GSH-px activity, glutamic-pyruvic transaminase (ALT), nitric oxide(NO) and nitric oxide synthase(NOS) were determined with different method, respectively. RESULTS After 1 h incubation, the mouse hepatocytes with various concentrations of polydatin (0 05, 0 1, 0 5, 1, 2, 4 mmol·L -1 ), significantly decreased the contents of NO and MDA, inhibited the NOS activity, increased the activities of SOD and GSH-px, suppressed the consumption of GSH, and reduced the elevated ALT level in the supernatant induced by H 2O 2. CONCLUSION Polydatin can protect hepatocytes from oxidative injury induced by H 2O 2.