【摘要】 目的:研究竹节人参对乙醇致小鼠胃黏膜损伤的保护作用,并对其机制进行探讨。方法:ICR雄性小鼠随机分为正常组,模型组,竹节人参低、中、高剂量组(1.5,3.0,6.0 g.kg-1)和饮多安组(1.5 g.kg-1),观察预防给予竹节人参对模型小鼠血清、尿液中乙醇含量的影响,测定小鼠血清、胃组织中谷胱甘肽过氧化物酶(GSH-PX),过氧化氢酶(CAT),超氧化物歧化酶(SOD)的活性及丙二醛(MDA),还原型谷胱甘肽(GSH)的含量;同时通过电镜观察小鼠胃黏膜超微结构病理变化。结果:竹节人参(1.5,3.0 g.kg-1)可显著降低模型小鼠血清中乙醇含量,加快小鼠体内乙醇通过尿液排出;降低模型小鼠血清、胃组织中MDA含量,提高GSH含量及GSH-PX,CAT,SOD酶活性;同时保护小鼠胃黏膜上皮细胞线粒体结构完整以维持其功能正常。结论:竹节人参对乙醇性胃黏膜损伤有明显保护作用,其作用机制之一可能是通过抑制乙醇的胃肠吸收,促进乙醇通过尿、粪等直接快速排出体外,同时加强乙醇在胃肠道的首过代谢,提高机体的抗氧化能力,通过对胃黏膜上皮细胞线粒体结构的保护,可能是其发挥解酒护胃作用的机制之一。更多还原

【Abstract】 Objective: To study the protective effects of Panax japonics(PJ) on alcohol-induced gastric lesion in mice and the possible mechanisms.Method: Male ICR mice were randomized into six groups: normal,control,PJ(1.5,3.0,6.0 g·kg-1) and Yinduoan(1.5 g·kg-1).The mice were pretreated with PJ before administering ethanol to observe the effect on the concentration of ethanol in serum and urine.The contents of MDA,GSH and GSH-PX,CAT and SOD activities were measured in serum and gastric mucosa,and subsequently,the pathological evaluation of stomach was also observed.Result: The concentration of ethanol in serum was evidently decreased after PJ(1.5,3.0 g·kg-1) was administrated because the ethanol was eliminated fleetly through urine.Synchronously the PJ reduced the content of MDA and increased the GSH increased in serum and gastric,besides,it increased the enzymatic activities of GSH-PX,CAT and SOD,and the ethanol-induced gastric mitochondria structure injury were ameliorated so as to make the function to normal.Conclusion: Based on these observations,one could conclude that the PJ is a potent protective agent against ethanol-induced gastric damages.One mechanism may be related with inhibiting the absorbability of ethanol at gastrointestinal tract,decreasing the concentration of ethanol in serum,and accelerating the ethanol elimination through urine so as to alleviate the ethanol-induced damage to gastrointestinal mucosal,enhancing the first-pass metabolism in stomach,and particularly increasing the antioxidant levels in serum and gastric.These gastroprotective effects might be,at least partly,through ameliorating the gastric mitochondria structure.更多还原