...
首页> 外文期刊>Experimental Gerontology >Regular exercise reduces 8-oxodG in the nuclear and mitochondrial DNA and modulates the DNA repair activity in the liver of old rats.
【24h】

Regular exercise reduces 8-oxodG in the nuclear and mitochondrial DNA and modulates the DNA repair activity in the liver of old rats.

机译:定期运动会减少老年大鼠肝脏中核和线粒体DNA中的8-oxodG,并调节DNA修复活性。

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

Exercise is often said to increase the generation of reactive oxygen species that are potentially harmful. On the other hand, regular exercise has various health benefits even late in life. The specific aim of this study was to explore effects of regular exercise on oxidative status of DNA in aged animals. We report that 2 months of regular treadmill running of aged rats (21 month old) significantly reduced 8-oxodG content to the level of young adult animals (11 month old) in both nuclear and mitochondrial DNA of the liver. The mitochondrial DNA showed 10-fold higher content of the oxidative lesion than the nuclear DNA. The levels in old animals were 2- and 1.5-fold higher than that in young adults for the nucleus and mitochondria, respectively. The activity of the repair enzyme OGG1 was upregulated significantly in the nucleus but not in mitochondria by the exercise. To our knowledge, this is the first report demonstrating that regular exercise can reduce significantly oxidative damage to both the nuclear and mitochondrial DNA. We suggest that the apparent beneficial outcomes in reducing the DNA damage by regular exercise can be interpreted in terms of hormetic effect by moderate oxidative stress and potential adaptation to stronger stresses.
机译:人们常说运动会增加潜在有害的活性氧的产生。另一方面,经常运动甚至可以延缓生命的发展。这项研究的具体目的是探讨规律运动对年老动物DNA氧化状态的影响。我们报告说,正常运行的2个月大龄大鼠(21个月大)的肝脏核和线粒体DNA含量均显着降低了8 oxodG含量至成年动物(11个月大)的水平。线粒体DNA的氧化损伤含量比核DNA高10倍。老年动物的核和线粒体水平分别比年轻成年人高2倍和1.5倍。通过锻炼,修复酶OGG1的活性在细胞核中显着上调,而在线粒体中则没有上调。据我们所知,这是第一份证明经常锻炼可以减少对核和线粒体DNA的氧化损伤的报告。我们建议,可以通过适度的氧化应激和潜在适应更强的应激的抑制作用来解释减少经常锻炼对DNA的明显有益效果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号