期刊文献+

不同运动强度对大鼠骨骼肌中低氧诱导因子-1αmRNA表达的影响 被引量:5

Effects of exercise intensities on expression of hypoxia inducible factor-1α mRNA in the skeletal muscle of rats
原文传递
导出
摘要 目的探讨不同运动强度和持续时间对大鼠腓肠肌中低氧诱导因子-1α(HIF-1α)mRNA表达的影响。方法80只大鼠随机分为对照组、低强度运动组、中强度运动组和高强度运动组,各组又按时间(1、3、7、14d)分为四个亚组,运用透射电镜观察大鼠骨骼肌细胞和RT-PCR法测定大鼠腓肠肌中HIF-1αmR-NA的表达。结果对照组HIF-1αmRNA存在基础性表达。与对照组HIF-1αmRNA的表达相比:低强度运动组第7天差异有显著性意义(P<0.05);中强度运动组和高强度运用组与对照组比较第3天和第7天差异均有显著性意义(P<0.05);但在第3天和第7天各不同强度运动组之间差异无显著性意义(P>0.05);各组第14天后HIF-1αmRNA表达与对照组相比差异均无显著性意义(P>0.05)。电镜结果提示:高强度运动组肌丝排列紊乱,线粒体肿胀明显,部分空泡化。结论运动会在一定时间内造成大鼠骨骼肌HIF-1αmRNA表达增加,是其适应机制之一;但不同运动强度诱导HIF-1αmRNA表达无显著性差异;长时间高强度运动会对骨骼肌细胞造成损害。 Objective To study effects of exercise intensities and durations on expression of hypoxia inducible factor-let mRNA in the skeletal muscle of rats. Methods Eighty rats were randomized into control group, low-intensity exercise group, moderate-intensity exercise group and high-intensity exercise group. Each group was further divided into four sub-groups in which rats were trained on the treadmill for one day, three days, seven days and 14 days respectively. Then cells of the skeletal muscle were observed under a transmission electron microscope and the expression of HIF-1α mRNA was detected by RT-PCR. Results HIF-1α mRNA could be basically expressed in control group during the 14 days. By contrast, there was a significant increase of HIF-1α mRNA in low-intensity exercise group at day 7 ( P 〈 0. 05). The expression of HIF-1α mRNA in moderate-intensity exercise group increased significantly at both day 3 and day 7 ( P 〈 0.05). The same results were observed in high-intensity exercise group, but had no significant difference compared with those in moderate-intensity exercise group( P 〉 0.05). At day 14, however, there was little significant difference in the result among all the groups ( P 〉 0.05). The observation by electron microscope revealed disordered skeletal muscle myofilaments, obvious swelling and partial vacuolization of mitochondria in high-intensity exercise group at day 14. Conclusions Appropriate exercise with appropriate duration can improve expression of HIF-1α mRNA in the skeletal muscle of rats which might be a positive mechanism to adjust to the exercise. Although different exercise intensities have little effect on the expression of HIF-1α mRNA, constant high-intensity exercise may damage skeletal muscles in rats.
出处 《中华创伤骨科杂志》 CAS CSCD 2006年第5期453-457,共5页 Chinese Journal of Orthopaedic Trauma
基金 广东省自然科学基金项目(04020431)
关键词 低氧诱导因子1Α 运动 骨骼肌 信使核糖核酸 Hypoxia inducible factor- 1α( HIF- 1α) Exercise Skeletal muscle Messenger RNA
  • 相关文献

参考文献9

  • 1Semenza GL, Wang GL. A nuclear factor induced by hypoxia via de novo protein synthesis binds to the human erythropoietin gene enhancer at a site required for transcriptional activation.Mol Cell Biol, 1992, 12: 5447-5454.
  • 2侯振海,余斌,汪志忠.急性低氧及低氧复合运动对骨骼肌及代谢酶活性的影响[J].中国临床康复,2004,8(5):902-903. 被引量:13
  • 3Bedford TG, Tipion CM, Nilson NC, et al. Maximum oxygen consumption of rats and its changes with various experimental procedure. J Appl Physiol, 1979, 47: 1278-1283.
  • 4Wagner PD. Skeletal muscle angiogenesis: a possible role for hypoxia. Adv Exp Med Biol, 2001, 502: 21-38.
  • 5Hu CJ, Wang LY, Chodosh LA, et al. Differential roles of hypoxia-inducible factor 1 alpha and hypoxia-inducible factor 2 alpha in hypoxic gene regulation. Mol Cell Biol, 2003, 23:9361-9374.
  • 6Kallio PJ, Pongratz I, Gradin K, et al. Activation of hypoxia-inducible factor 1 alpha: posttranscriptional regulation and conformational change by recruitment of the ARNT transcription factor. Proc Narl Acad Sci USA, 1977, 94:5667-5672.
  • 7Hoppeler H, Vogt M. Hypoxia training for sea-level performance. Training high-living low. Adv Exp Med Biol, 2001,502: 61-73.
  • 8Vogt M, Puntschart A, Geiser J, et al. Molecular adaptations in humans skeletal muscle to endurance training under simulated hypoxic condition. J Appl Physiol, 2001, 91: 173-182.
  • 9Gregg L, Sememza GL. HIF-1 and human disease: one highly involved factor. Genes Develop, 2000, 14: 1983-1991.

共引文献12

同被引文献83

引证文献5

二级引证文献22

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部