摘要:
目的:探讨尿酸对人肝细胞功能及氧化应激的影响及其对肝细胞损伤作用。方法体外培养人肝细胞(HL-7702),分别加入0(对照组)、5、10、20、30 mg/dL 的尿酸进行干预,于24、48、72、96 h 后收集细胞。MTT法检测细胞活力。化学比色法检测肝细胞谷草转氨酶(AST)、谷丙转氨酶(ALT)、丙二醛(MDA)、谷胱甘肽过氧化物酶(GSH-Px)及超氧化物歧化酶(SOD)的水平。结果5、10、20、30 mg/dL 尿酸组细胞活力(MTT)、ALT、AST 均高于对照组(P <0.05),作用48、72、96 h 均高于24 h (P <0.05)。5、10、20 mg/dL 尿酸组 SOD 均较对照组减小(P <0.05);作用48、72、96 h 与24 h 比较均减小(P <0.05)。培养96 h 后 GSH-Px 较24 h 减小(P <0.05),30 mg/dL 尿酸组 GSH-Px 对照组增大(P <0.05);作用96 h 时 MDA 与24、48、72 h 比较均增大(P <0.05)。结论尿酸可以促进肝细胞增殖,并可能通过诱导氧化应激加强对肝细胞的损伤作用。%Objective To observe the effects of uric acid on human hepatocyte function and oxidative stress. Methods Human hepatocyte (HL-7702)cell were cultured in vitro,stimulated by 0,5,10,20,30 mg/dL UA,then collected the cells after 24,48,72,96 h.The cell viability was measured by MTT as say.The glutamic-oxalacetic transamina-se (AST )、glutamic-pyruvic transaminase (ALT )、 malon-dialdehyde (MDA)、glutathione peroxidase(GSH-Px)、superoxide dismutase (SOD)levels were detected by enzyme mark instrument.Results The cell viability,ALT and AST in 5,10,20,30 mg/dL group were higher than those in the control group (P <0.05),which were also higher in 48,72,96 h than 24h (P <0.05). SOD were decreased in 5,10,20mg/dL UA group compared with the control group,SOD decreased in 48,72,96 h compared with 24 h (P <0.05).GSH-Px decreased in 96 h than 24 h (P <0.05).MDA in the 30 mg/dL group were increased as compared with control group (P <0.05);in 96 h were increased as compared with 24,48,72h (P <0.05).Conclusion Uric acid can promote the human hepatocyte viability, and promote its injury via the oxidative stress response.