中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (8): 1207-1212.doi: 10.3969/j.issn.2095-4344.2477

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中等强度训练干预大鼠骨骼肌抗增殖蛋白PHB1表达及线粒体呼吸功能的变化

方  雯1,李  泽2,柳昭明2,冯  红3   

  1. 1清华大学,北京市  100084;2北京朝阳中西医结合急诊抢救中心,北京市  100020;3天津体育学院,天津市  300381
  • 收稿日期:2019-06-21 修回日期:2019-06-22 接受日期:2019-07-31 出版日期:2020-03-18 发布日期:2020-01-21
  • 通讯作者: 冯红,博士,教授,天津体育学院,天津市 300381
  • 作者简介:方雯,女,1991年生,江西省抚州市人,汉族,在读博士,主要从事运动人体科学方面的研究。
  • 基金资助:
    国家自然科学基金项目(31470061)

Changes of mitochondrial respiratory function and PHB1 expression in rat skeletal muscle after moderate-intensity training

Fang Wen1, Li Ze2, Liu Zhaoming2, Feng Hong3   

  1. 1Tsinghua University, Beijing 100084, China; 2Beijing Chaoyang Integrative Medicine Emergency Medical Center, Beijing 100020, China; 3Tianjin University of Sport, Tianjin 300381, China
  • Received:2019-06-21 Revised:2019-06-22 Accepted:2019-07-31 Online:2020-03-18 Published:2020-01-21
  • Contact: Feng Hong, PhD, Professor, Tianjin University of Sport, Tianjin 300381, China
  • About author:Fang Wen, Doctoral candidate, Tsinghua University, Beijing 100084, China
  • Supported by:
     the National Natural Science Foundation of China, No. 31470061

摘要:

文题释义:
线粒体呼吸功能:线粒体呼吸功能的强弱反映线粒体在机体内代谢能力的强弱,线粒体内的氧化磷酸化反应影响线粒体的呼吸功能,而他们发生反应的主要场所在线粒体内膜呼吸链上。该研究观察中等强度训练对线粒体呼吸功能的影响,进一步讨论线粒体内膜上蛋白PHB1对线粒体呼吸功能以及机体能量代谢的影响。
线粒体结构完整:线粒体结构的完整与否影响到线粒体的功能,进一步影响线粒体呼吸链上各类酶的活性,从而影响线粒体的能量代谢。该研究关注的是线粒体内膜上蛋白PHB1对线粒体整体结构的影响,为其作为调控线粒体呼吸功能及能量代谢的相关靶点提供依据。

背景:研究显示长期中等强度规律运动可以改善骨骼肌细胞线粒体电子呼吸链复合体酶的活性,从而提高其做功能力和抵抗疲劳能力。

目的:探讨中等强度训练对大鼠骨骼肌内抗增殖蛋白及线粒体呼吸功能的影响。

方法:32只健康雄性SD大鼠随机分为2组:安静对照组、中等强度训练组,每组16只。中等强度训练组的训练方案:第1周以10 m/min速度跑,每周6 d,每天10 min,坡度10°;第2周以15 m/min速度跑,每周6 d,每天增加10 min至60 min结束,坡度10°;第3-8周以15 m/min速度跑,每周6 d,每天60 min,坡度10°。末次实验后48 h处死大鼠,提取骨骼肌以及线粒体,检测线粒体呼吸控制率、ATP含量、活性氧水平、复合体V活性及PHB1蛋白表达。

结果与结论:①与安静对照组相比,中等强度训练组骨骼肌线粒体呼吸控制率显著性升高(P < 0.001)、ATP含量显著性升高(P < 0.05)、活性氧水平显著降低(P < 0.001)、复合体V活性显著升高(P < 0.05)、PHB1表达显著升高(P < 0.01);②通过相关性分析得出:经过8周中等强度训练后大鼠骨骼肌内PHB1的表达分别与ATP含量、复合体V活性呈正相关,与活性氧水平呈负相关;③结果表明,中等强度训练通过促进PHB1表达提高线粒体氧化磷酸化功能,维持线粒体膜结构,增强线粒体呼吸功能。

ORCID: 0000-0002-6888-7854(方雯)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


关键词: 中等强度训练, 骨骼肌, 线粒体呼吸功能, 抗增殖蛋白, 能量代谢

Abstract:

BACKGROUND: Studies have shown that long-term moderate-intensity regular exercise can improve the activity of mitochondrial respiratory chain complex enzymes in skeletal muscle cells, thereby improving their power capability as well as the ability to resist fatigue.

OBJECTIVE: To explore the effect of moderate-intensity training on prohibitin (PHB) expression and mitochondrial respiratory function in rat skeletal muscle.

METHODS: Thirty-two healthy male Sprague-Dawley rats were randomly divided into two groups: quiet control group and moderate-intensity training group, each of 16 rats. In the moderate-intensity training group, the treadmill training was performed at a slope of 10°: in the 1st week, running at 10 m/min, 10 minutes per day, 6 days per week; in the 2nd week, running at 15 m/min, increased from 10 minutes per day to 60 minutes per day with an increase of 10 minute per day, 6 days per week; in the 3rd to 8th week, running at 15 m/min, 60 minutes per day, 6 days per week for a total of 8 weeks. Rats were sacrificed at 48 hours after the final experiment, and mitochondria were extracted from skeletal muscle samples. Mitochondrial respiration control rate, adenosine triphosphate content, reactive oxygen species level, complex V activity and PHB1 protein expression were measured.

RESULTS AND CONCLUSION: Compared with the quiet control group, in the moderate-intensity training group, mitochondrial respiration control rate in the skeletal muscle increased significantly (P < 0.001), adenosine triphosphate content increased significantly (P < 0.05), reactive oxygen species level decreased significantly (P < 0.001), the activity of complex V was significantly increased (P < 0.05) and PHB1 expression was significantly increased (P < 0.01). The correlation analysis showed that after 8 weeks of moderate-intensity training, the expression of PHB1 in the skeletal muscle of rats was positively correlated with adenosine triphosphate content and complex V activity, and negatively correlated with reactive oxygen species level. Therefore, moderate-intensity training improves mitochondrial oxidative phosphorylation, effectively maintains mitochondrial membrane structure and enhances mitochondrial respiratory function by increasing the expression of PHB1.

Key words: moderate-intensity training, skeletal muscle, mitochondrial respiratory function, PHB1, energy metabolism

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