D-半乳糖调控SD大鼠海马巯醇抗氧化物(酶)致衰老的作用研究  被引量:3

D-galactose Regulates Thiol Antioxidants and Induces Aging in Rats

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作  者:李守民[1] 王婷婷[2] 胡艳丽[1] 艾青龙[2] 孙俊[1] 陆地[1] 

机构地区:[1]昆明医学院人体解剖学教研室,云南昆明650031 [2]昆明医学院第一附属医院神经内科,云南昆明650032

出  处:《昆明医学院学报》2009年第5期1-5,共5页Journal of Kunming Medical College

基  金:国家自然科学基金资助项目(30860336);云南省科技厅-昆明医学院联合项目(2007C0005R;2008C00054R)

摘  要:目的构建D-半乳糖(D-galactose,D-ga)l致衰老模型,探讨D-gal诱导衰老的分子机制,为临床治疗阿尔茨海默病(AD)提供理论依据.方法大鼠腹腔注射D-gal100mg/(kg.d)×56d造模.第50~56天进行Morris水迷宫实验(MWM);第57天取脑组织,生物化学方法分光光度法检测大脑海马一氧化氮合酶(NOS)、一氧化氮(NO)、铜锌-过氧化物岐化酶(Cu,Zn-SOD)、总超氧化物歧化酶(T-SOD)、谷胱甘肽还原酶(GR)、谷胱甘肽s-转移酶(GSH-ST)、谷胱甘肽过氧化酶(GSH-PX)、谷胱甘肽(GSH)、丙二醛(MDA),总抗氧化能力(T-AOC)和过氧化氢(H2O)2的表达水平.结果模型大鼠较正常大鼠逃避潜伏期明显延长(P<0.05),在第Ⅲ象限逗留的时间明显减少(P<0.05),跨越平台次数明显减少(P<0.05),海马内MDA、H2O2和NO表达增加,SOD、GSH、GSH-ST、GSH-Px、T-AOC表达降低,而NOS表达没有明显变化(P>0.05).结论D-gal能通过调控内源性巯基抗氧化物(酶),减退学习记忆能力,诱导大鼠神经系统的衰老.Objective To underlying investigate the mechanisms of the aging induced by D-galactose, we used D-galactose to establish aging rat model. Methods Aging rats model were established by peritoneal injection of D-Galactose ( 100 mg/kg, 56 days) into the rats. Then, we examined spatial memory with the morris water maze, and the extent of oxidative stress biomarkers including malondialdehyde (MDA) , total antioxidative capabilities (T-AOC) , total superoxide dismutase (T-SOD) , and glutathione peroxidase (GSH-Px) activities in hippocampus. Results Chronic systemic exposure of D-galactose to rats induced a spatial memory deficit and increased cerebral oxidative stress, including an increase in malondialdehyde (MDA), hydrogen peroxide (H2O2), nitric oxide (NO), while a decrease in total anti-oxidative capabilities (T-AOC),total superoxide dismutase (T-SOD) , glutathione (GSH) , glutathione peroxidase (GSH-Px) , glutathione-s-transferase (GSH-ST) activities. Conclusion The present results suggest that chronic D-galactose exposure can induce a spatial memory deficit and aging of central nervous system by manipulating thiol antioxidants and NO of the hippocampus in rats.

关 键 词:阿尔茨海默病 学习与记忆 氧化应激 抗氧化物酶 

分 类 号:R741.02[医药卫生—神经病学与精神病学]

 

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