中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (36): 5791-5796.doi: 10.3969/j.issn.2095-4344.0559

• 肌肉肌腱韧带组织构建 tissue construction of the muscle, tendon and ligament • 上一篇    下一篇

Omi/Beclin-1通路在离心运动致骨骼肌自噬中的作用

雷槟恺1,2,孙君志1,赵晓琴3,丁海丽1,刘  永2,王瑞元2,李俊平2   

  1. (1成都体育学院运动医学与健康学院,四川省成都市   610041; 2北京体育大学运动人体科学学院,北京市   100084;3太原理工大学体育学院,山西省太原市   030024)
  • 收稿日期:2018-07-27 出版日期:2018-12-28 发布日期:2018-12-28
  • 通讯作者: 李俊平,博士,副教授,北京体育大学运动人体科学学院,北京市 100084
  • 作者简介:雷槟恺,男,1993年生,四川省绵阳市人,北京体育大学在读博士,主要从事运动对骨骼肌形态和机能的影响研究。
  • 基金资助:

    国家自然科学基金(31471133);成都体育学院运动医学与健康研究所创新课题(CX17B04);中央高校基本科研业务费专项资金资助课题(2018PT003,2015QN19)

Role of Omi/Beclin-1 signaling pathway in the eccentric exercise-induced skeletal muscle autophagy

Lei Bingkai1, 2, Sun Junzhi1, Zhao Xiaoqin3, Ding Haili1, Liu Yong2, Wang Ruiyuan2, Li Junping2   

  1. (1School of Sports Medicine and Health, Chengdu Sport Institute, Chengdu 610041, Sichuan Province, China; 2School of Sports Human Science, Beijing Sport University, Beijing 100084, China ; 3Physical Education Institute, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, China)
  • Received:2018-07-27 Online:2018-12-28 Published:2018-12-28
  • Contact: Li Junping, PhD, Associate professor, School of Sports Human Science, Beijing Sport University, Beijing 100084, China
  • About author:Lei Bingkai, Doctoral candidate, School of Sports Medicine and Health,Chengdu Sport Institute,Chengdu 610041, Sichuan Province, China; School of Sports Human Science, Beijing Sport University, Beijing 100084, China
  • Supported by:

    the National Natural Science Foundation of China, No. 31471133; Innovative Project in Institute of Sports Medicine and Health, Chengdu Sport Institute, No. CX17B04; Special Fund for Basic Research and Business Expenses of Central Universities, No. 2018PT003 and 2015QN19

摘要:

文章快速阅读:

文题释义:
离心运动:离心运动是指肌肉在收缩产生张力同时被拉长(起止点相互远离)的运动。不适宜的运动方式尤其是离心运动,会导致骨骼肌自噬平衡被打破,骨骼肌超微结构改变,最终影响骨骼肌正常收缩活动。
自噬:自噬是广泛存在于真核细胞中的生命现象,是生物在其生长发育、衰老过程中都存在的一个净化自身多余或受损细胞器的共同机制。但自噬的过度激活或过度抑制都可能影响骨骼肌的正常生理功能。
摘要
背景
:离心运动会导致骨骼肌自噬水平改变,使骨骼肌超微结构发生改变,影响骨骼肌正常的收缩活动。
目的:观察离心运动后不同时程骨骼肌细胞自噬的情况及Omi/Beclin-1信号通路的变化,以探究运动对骨骼肌自噬的影响及可能机制。
方法:将32只健康雄性大鼠分为安静对照组(8只),离心运动组(24只)。离心运动组完成一次性跑台运动(坡度为-16°,速度为16 m/min,时间为90 min),在运动后即刻、24 h、48 h取材(各8只),使用Western blot方法检测各组不同时程Lc3-Ⅱ、Omi、HAX-1、Beclin-1蛋白表达水平。
结果与结论:①离心运动后,Lc3-Ⅱ、Omi、Beclin-1蛋白表达显著升高;Lc3-Ⅱ和Omi蛋白表达在运动后即刻达到最高峰;Beclin-1在运动后24 h到达峰值;②离心运动后,HAX-1蛋白表达显著降低,在24 h达到最低,之后开始恢复;运动后48 h与安静组相比差异无显著性意义;③结果显示:离心运动可以导致骨骼肌细胞自噬增强,可能通过上调Omi/Beclin-1信号通路所致。

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
ORCID: 0000-0002-5859-4687(雷槟恺)

关键词: 离心运动, 骨骼肌, 自噬, Omi, Beclin-1, 组织构建

Abstract:

BACKGROUND: Eccentric exercise can cause the ultrastructural changes in the skeletal muscle due to autophagy, thereby affecting the normal the contraction of skeletal muscle.
OBJECTIVE: To explore the effect of eccentric exercise on the skeletal muscle cell autophagy and investigate the underlying mechanisms by observing the skeletal muscle cell autophagy and the changes of Omi/Beclim-1 signaling pathway after eccentric exercise.
METHODS: Thirty-two healthy male rats were divided into control (n=8) and experimental (n=24) groups. The rats in the experimental group underwent eccentric exercise on a treadmill (16° decline, 16 m/minute for 90 minutes), and then 8 rats were killed at 0, 24, and 48 hours, respectively. The expression levels of LC3-II, Omi, HAX-1 and Beclin-1 were determined by western blot assay.
RESULTS AND CONCLUSION: The expression levels of LC3-II, Omi, and Beclin-1 protein were significantly increased after eccentric exercise, the expression levels of LC3-II and Omi protein peaked at 0 hour, and the expression level of Beclin-1 peaked at 24 hours. The expression level of HAX-1 protein was significantly decreased after eccentric exercise, reached the lowest level at 24 hours, and then returned to normal level. The expression levels at 48 hours after exercise were significantly different from those in the control group. These results suggest that eccentric exercise can result in an increase in skeletal muscle cell autophagy via upregulating Omi/Beclin-1 signaling pathway probably.

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

Key words:  Sports Medicine, Muscle, Skeletal, Autophagy, Tissue Engineering

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