中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (16): 2502-2507.doi: 10.3969/j.issn.2095-4344.0219

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

运动性骨骼肌损伤大鼠膜修复蛋白dysferlin的作用机制

黄巧婷1,2,许  杰1,林家仕3   

  1. 1成都大学,四川省成都市  610106;2北京体育大学,北京市  100084;3集美大学,福建省厦门市  361021
  • 收稿日期:2018-03-03 出版日期:2018-06-08 发布日期:2018-06-08
  • 通讯作者: 许杰,博士,讲师,成都大学,四川省成都市 610106
  • 作者简介:黄巧婷,1986年生,女,汉族,福建省人,2016年北京体育大学毕业,博士,现于成都大学体育学院工作,讲师。
  • 基金资助:

    国家自然科学基金(31401017);成都大学自然基金(2017XJR12);中央高校基本科研业务费专项资金(2015BS004)

Mechanism by which dysferlin promotes repair of exercise-induced skeletal muscie injury in rats

Huang Qiao-ting1, 2, Xu Jie1, Lin Jia-shi3   

  1. 1Chengdu University, Chengdu 610106, Sichuan Province, China; 2Beijing Sport University, Beijing 100084, China; 3Jimei University, Xiamen 361021, Fujian Province, China
  • Received:2018-03-03 Online:2018-06-08 Published:2018-06-08
  • Contact: Xu Jie, Ph.D., Lecturer, Chengdu University, Chengdu 610106, Sichuan Province, China
  • About author:Huang Qiao-ting, Ph.D., Lecturer, Chengdu University, Chengdu 610106, Sichuan Province, China; Beijing Sport University, Beijing 100084, China
  • Supported by:

    the National Natural Science Foundation of China, No. 31401017; the Natural Science Foundation of Chengdu University, No. 2017XJR12; the Fundamental Research Funds for the Central Universities, No. 2015BS004

摘要:

文章快速阅读:

文题释义:
运动性肌损伤:运动性骨骼肌损伤(exercise-indused muscle damage,EIMD)是指进行大强度、长时间或不习惯运动后所产生的骨骼肌超微结构损伤,通常的表现为延迟性肌肉酸痛,即肌肉酸痛并不发生在运动期间或运动后即刻,而是在运动后的24 h逐渐加剧。
Dysferlin:Dysferlin是一种与肌肉修复有关的Ⅱ型跨膜蛋白,主要存在肌纤维膜和肌纤维囊泡中,其由DYSF基因编码,又被称为与dystrophy有关的fer-1-like蛋白,在骨骼肌细胞膜修复过程中起关键作用。
摘要
背景
:目前关于dysferlin的研究多集中在肌肉疾病(如肌营养不良)上,而针对运动后肌损伤发生后细胞膜的修复与dysferlin的关系鲜有研究。
目的:观察急性离心运动后大鼠腓肠肌细胞膜通透性及膜修复蛋白dysferlin及calpain3表达变化,为深化肌组织再生分子机制及肌肉疾病的运动治疗提供理论参考。
方法:将32只大鼠随机分为对照组、运动后24,48,72 h组。采用免疫组织化学染色、Western blot及qRT-PCR等方法检测大鼠腓肠肌细胞膜完整性和dysferlin,calpain3蛋白及基因表达。
结果与结论:与对照组相比,运动后24 h组血清肌酸激酶活性、Calpain3 mRNA,dysferlin蛋白表达及骨骼肌细胞膜损伤程度均增高(P < 0.05或P < 0.01);运动后 24,48 h组大鼠dysferlin mRNA表达量高于运动后72 h组(P < 0.05)。结果说明,离心运动后24 h,骨骼肌细胞膜损伤最为严重,人体通过Ca2+内流,激活了细胞内钙激活酶calpain3基因表达,进而通过促进膜特异性修复蛋白dysferlin表达修复受损的骨骼肌细胞膜。

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: 0000-0001-6407-6993(黄巧婷)

关键词: 运动性肌损伤, 离心运动, 肌酸激酶, Dysferlin, Calpain3, 延迟性肌肉酸痛, SNARE复合体, 免疫组织化学染色, Western blot, RT-qPCR, 组织工程

Abstract:

BACKGROUND: Numerous studies concerning dysferlin focus on muscle diseases (such as muscular dystrophy), but the relationship between membrane repair after exercise-induced muscle damage and dysferlin is little reported.
OBJECTIVE: To observe the cell membrane permeability and expression levels of dysferlin and calpain3 in the rat gastrocnemius after acute eccentric exercise, so as to provide an theoretical reference for exploring the molecular mechanism of muscle regeneration and the exercise therapy of muscular diseases.
METHODS: Thirty-two Sprague-Dawley rats were randomly divided into four groups including control, 24, 48 and 72 hours post exercise groups. The membrane permeability and expression levels of dysferlin and calpain3 were determined by immunohistochemistry, western blot assay and qRT-PCR.
RESULTS AND CONCLUSION: The activity of serum creatine kinase, and expression levels of calpain3 mRNA and dysferlin protein, as well as membrane permeability at 24 hours post exercise were significantly greater than those in the control group (P < 0.05 or 0.01). The expression level of dysferlin mRNA at 24 and 48 hours post exercise was significantly higher than that at 72 hours post exercise (P < 0.05). Therefore, the damage to the skeletal muscle cell membrane was the most severe at 24 hours after eccentric exercise. Due to Ca2+ influx, expression of calpain3 mRNA was activated, and then the damaged cell membrane was repaired by increasing the expression of dysferlin.

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: Tissue Engineering, Sports Medicine, Cell Membrane

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