还原型谷胱甘肽对微囊藻毒素-LR染毒小鼠肝脏抗氧化功能的影响

摘要

目的：探讨抗氧化剂还原型谷胱甘肽（GSH）对微囊藻毒素‐LR（MC‐LR）染毒小鼠肝脏抗氧化功能的影响。方法选择健康清洁级5周龄昆明种小鼠40只，通过随机抽样的方法分为5组，生理盐水对照组、GSH对照组、MC‐LR染毒组、MC‐LR染毒＋ GSH低剂量组（GSH低剂量干预组）、MC‐LR染毒＋GSH高剂量组（GSH高剂量干预组），每组8只，雌雄各半，经腹腔注射持续染毒15 d ，检测肝脏组织病理变化情况及肝脏组织 GSH水平、超氧化物歧化酶（SOD）、谷胱甘肽过氧化物酶（GSH‐Px）活力和丙二醛（MDA）水平。结果与生理盐水对照组比较，MC‐LR染毒组肝细胞GSH水平及SOD、GSH‐Px活力明显降低（P＜0．05），MDA水平明显增高（P＜0．05）。与MC‐LR染毒组比较，GSH低、高剂量干预组GSH水平及SOD、GSH‐Px活力均增高（P＜0．05），MDA水平均降低（P＜0．05）。结论 GSH干预后可减轻MC‐LR所致小鼠肝脏氧化毒性，对肝脏具有一定的保护作用。%Objective To study the effect of glutathione(GSH)on liver antioxidative function of microcystin‐LR(MC‐LR)‐in‐duced mice .Methods Forty healthy clean class KM 5‐week old mice were selected and divided into five groups by the random sam‐pling method ,including the norml saline control group ,GSH control group ,MC‐LR group ,MC‐LR+low dose GSH group and MC‐LR+high dose GSH group ,8 cases in each group ,half male and half female .The experiment lasted for 15 d by intraperitoneal injec‐tion of MC‐LR ,then the liver histopathological changes ,liver tissue activity of superoxide dismutase (SOD) ,glutathione peroxidase (GSH‐Px)and content of malondialdehyde(MDA) were detected .Results Compared with the normal saline control group ,liver cell GSH level ,SOD and GSH‐Px activities in the MC‐LR group were significantly decreased (P<0 .05) ,while the MDA level was sig‐nificantly increased (P<0 .05) .Compared with the MC‐LR group ,the GSH level ,SOD and GSH‐Px activities in the MC‐LR+low dose GSH group and MC‐LR+high dose GSH group were significantly increased (P<0 .05) ,while the MDA level was significant‐ly decreased(PP<0 .05) .Conclusion The GSH intervention can alleviate MC‐LR induced mouse liver oxidative toxicity and has protective effect on the liver to some extent .