癌变·畸变·突变 ›› 2010, Vol. 22 ›› Issue (5): 335-338.doi: 10.3969/j.issn.1004-616x.2010.05.002

• 论著 • 上一篇    下一篇

γ射线照射引起氧化损伤促进衰老

梁 欣,李文丽,海春旭,杨薛康,张 伟,柏 桦   

  1. 第四军医大学军事预防医学系毒理学教研室,陕西 西安 710033
  • 收稿日期:2010-06-18 修回日期:2010-07-05 出版日期:2010-09-30 发布日期:2010-09-30
  • 通讯作者: 海春旭

Oxidative damage which caused by γ-rays promotes aging

LIANG Xin, LI Wen-Li, HAI Chun-xu, YANG Xue-kang, ZHANG Wei, BAI Hua.   

  1. Department of Toxicology,the Fourth Military Medical University, Xi'an 710033,Shanxi, China
  • Received:2010-06-18 Revised:2010-07-05 Online:2010-09-30 Published:2010-09-30
  • Contact: HAI Chun-xu

摘要: 目的: 利用γ射线照射引起氧化损伤,观察氧化损伤与衰老的关系。 方法: 将60只昆明小鼠随机分成对照组、D_半乳糖组、γ射线组和D_半乳糖+γ射线组,共4组,每组15只。D_半乳糖组于小鼠腹腔注射D_半乳糖建立衰老模型,γ射线组给予γ射线全身照射, D_半乳糖+γ射线组在小鼠腹腔注射D_半乳糖的同时给予射线照射,对照组给小鼠腹腔注射等量的生理盐水。各组小鼠按上述处理80 d后处死,取材,观察肝、脑组织超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量,脂褐素含量,血清晚期糖基化终产物(AGEs)水平和肝组织β_半乳糖苷酶染色情况。 结果: 与对照组相比,D_半乳糖组小鼠肝、脑组织的SOD活性降低(P<0.05),MDA含量、血清AGEs水平和脂褐素含量升高(P<0.05),肝脏β_半乳糖苷酶染色呈阳性改变;γ射线组小鼠肝、脑组织SOD活性降低(P<0.05),MDA含量、脂褐素含量升高(P<0.05),肝脏β_半乳糖苷酶染色呈阳性改变,血清AGEs水平变化不明显(P>0.05)。与D_半乳糖组相比, D_半乳糖+γ射线组小鼠肝、脑组织的SOD活性降低(P<0.05),MDA含量、血清AGEs水平和脂褐素含量升高(P<0.05),肝脏β_半乳糖苷酶染色表达增强。 结论: γ射线全身照射后可加重氧化损伤,进而促进衰老的改变。

关键词: 衰老, 自由基, 氧化损伤

Abstract: OBJECTIVE: To assess the relation of aging and oxidative damage caused by γ_rays. METHODS: 60 mice were divided into 4 groups:group A was control group; mice of group B were treated with intraperitoned D_galactose; mice of group C were irradiated by γ_rays; mice of group D were treated with D_galactose and irradiation. The activity of SOD,contents of MDA and lipofuscin and AGEs in blood serum were determined,the expression in of β_galactosidase by staining was measured at the end of 80 days' experiment. RESULTS: Compared with group A, the activity of SOD was decreased in group B(P<0.05),the level of AGEs and contents of MDA and lipofuscin increased in group B(P<0.05), also the β_galactosidase activity was positive. The activity of SOD was decreased in group C(P<0.05),contents of MDA and lipofuscin increased in group C(P<0.05),also the β_galactosidase activity was positive, but no significant difference was found in the level of AGEs in group C(P>0.05). Compared with group B, the activity of SOD was decreased in group D(P<0.05),the level of AGEs and contents of MDA and lipofuscin were increased in group D(P<0.05), also the β_galactosidase activity was raised. CONCLUSION:Aging was enhanced by oxidative damage caused by γ_rays.

Key words: aging, free radicals, oxidative damage