三七总皂苷对大鼠肝脏低温保存作用的实验研究

Experimental Study on Cold Preservation of Rat Liver with Panax Notoginseng Saponins

目的研究三七总皂苷(PNGS)对大鼠肝脏低温保存的影响及其作用机理.方法采用大鼠离体肝脏再灌注模型(IPRL),用Fura-2法测定DMEM液中加入不同浓度的PNGS置低温保存2 h后肝细胞内钙离子浓度; 将含有不同浓度PNGS的乳酸林格氏液(LR)低温保存24 h的肝脏再灌注30 min后检测肝脏功能、氧自由基代谢产物、能量物质和胆汁流量并进行形态学观察.结果大鼠肝细胞内钙离子浓度、MDA、AST、ALT及LDH浓度明显低于对照组,而SOD、ATP、TAN、EC含量及胆汁引流量则高于对照组(P＜0.01),NGS对大鼠肝脏的保护作用显示出剂量依赖性,在200～600 mg范围内随剂量增加保护作用随之增强(P＜0.01),在800～1 000 mg范围内虽有增强,但差异无显著性意义(P>0.05).结论 PNGS可通过抑制钙超载、抗氧自由基损伤、促进能量物质代谢等多种机理减轻大鼠肝脏在低温保存时的损伤.

Objective To investigate the effects and mechanism of Panax Notoginseng saponins (PNGS) on rat liver during cold preservation. Methods Using isolated perfusion of rat liver model (IPRL), Fura 2 method was used to measur the concentration of calcium ion in hepatic cells which had been preserved in DMEM solution with different concentration of PNGS added and cold preserved for 2 hours. Liver function, metabolic products of oxygen free radicals, energy substance and aucount of biliary flow as well as morphological study were measured from liver tissue which had been cold preserved in lactate riuges’s solution containing different dosages of PNGS for 24 hours and 30 minutes reperfusion.Results The contents of intracellur calcium of the rat hepatocytes,MDA, AST, ALT, LDH were lower than those in the control group,but SOD, ATP, TAN, EC and bile production were higher than those in the control group( P <0.01).During 200-600 mg,the protective effects of the PNGS were correlated with the dosage and manifest dosage dependence( P <0.01),800-1000 mg were not significant( P >0.05). Conclusion PNGS relieve the injury of the rat liver during cold preservation. The mechanism might through inhibition calcium overload, improve the energy metabolism, play a role against free radical injury realize.