中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (28): 4512-4517.doi: 10.3969/j.issn.2095-4344.2017.28.014

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

NOD样受体热蛋白结构域相关蛋白3炎性小体在低氧诱导骨骼肌线粒体损伤中的作用

张子怡1,薄 海2,杨 爽1,袁 瑶2,张 勇1   

  1. 1天津体育学院天津市运动生理学与运动医学重点实验室,天津市 300381;2武警后勤学院军事训练医学教研室,天津市 300309
  • 修回日期:2017-08-07 出版日期:2017-10-08 发布日期:2017-11-10
  • 通讯作者: 张勇,博士,教授,天津体育学院天津市运动生理学与运动医学重点实验室,天津市 300381
  • 作者简介:张子怡,女,1984年生,天津市人,汉族,天津体育学院在读博士,实验师,主要从事运动氧化应激研究。
  • 基金资助:

    国家自然科学基金(31571224,81370454,31110103919);天津市自然科学基金(14JCZDJC36600);武警后勤学院研究基金(WHB201507)

Role of NOD-like receptor family, pyrin domain containing 3 inflammasome in the hypoxia-induced skeletal muscle mitochondrial dysfunction

Zhang Zi-yi1, Bo Hai2, Yang Shuang1, Yuan Yao2, Zhang Yong1   

  1. 1Tianjin Key Laboratory of Exercise Physiology & Sports Medicine, Tianjin University of Sport, Tianjin 300381, China; 2Department of Military Training Medicine, Logistics University of Chinese People's Armed Police Force, Tianjin 300162, China
  • Revised:2017-08-07 Online:2017-10-08 Published:2017-11-10
  • Contact: Zhang Yong, M.D., Professor, Tianjin Key Laboratory of Exercise Physiology & Sports Medicine, Tianjin University of Sport, Tianjin 300381, China
  • About author:Zhang Zi-yi, Studying for doctorate, Experimentalist, Tianjin Key Laboratory of Exercise Physiology & Sports Medicine, Tianjin University of Sport, Tianjin 300381, China
  • Supported by:

    the National Natural Science Foundation of China, No. 31571224, 81370454, and 31110103919; the Natural Science Foundation of Tianjin, No. 14JCZDJC36600; the Science Foundation of Logistics University of Chinese PAPF, No. WHB201507

摘要:

文章快速阅读:

文题释义:
NLRP3炎性小体:
是机体固有免疫系统的重要成员,由识别蛋白NOD样受体NLR、衔接蛋白ASC和效应蛋白caspase-1共同组成。识别蛋白NLR感知应激源后聚集为NLRP3寡聚体,通过ASC募集并激活caspase-1,活化的caspase-1切割炎症因子白细胞介素1β,使之成熟和释放,参与炎症反应。
线粒体:线粒体历来被誉为真核细胞的“动力站”,通过氧化磷酸化作用的能量偶联产生ATP,为机体提供90%以上的能量。此外,线粒体呼吸链产生的自由基占细胞中活性氧总量的95%。线粒体对调节细胞能量态、氧化还原态、信号转导等的调控具有重要作用,构成多种重要细胞信号转导通路的整合中心。

 

摘要
背景:
NOD样受体热蛋白结构域相关蛋白3(NOD-like receptor family, pyrin domain containing 3,NLRP3)炎性小体是否参与低氧对骨骼肌线粒体的损伤,及其相关机制尚不清楚。
目的:观察NLRP3炎性小体特异性阻断剂VX-765对慢性低氧大鼠骨骼肌线粒体功能的影响,以探讨NLRP3炎性小体在低氧诱导骨骼肌线粒体损伤中的作用。
方法:将30只SD大鼠随机分为常氧组、低氧组和低氧+VX-765组。低氧干预为低氧帐篷暴露,氧浓度设定为11.3%;VX-765干预为每日腹腔注射VX-765溶液1次,注射剂量为50 mg/kg,干预持续4周。
结果与结论:VX-765显著抑制低氧暴露大鼠骨骼肌NLRP3和凋亡相关斑点样蛋白表达,降低caspase-1活性及白细胞介素1β含量,上调过氧化物酶体增殖物激活受体γ辅激活因子1α和细胞色素C氧化酶亚基Ⅳ表达,提高线粒体ATP合成活力和膜电位,抑制线粒体H2O2产生速率。结果表明,低氧可通过活化NLRP3炎性小体和损伤线粒体功能导致骨骼肌功能障碍,线粒体损伤产生大量活性氧,继而活化NLRP3炎性小体以促进白细胞介素1β等炎症因子的产生,而炎症因子可通过下调过氧化物酶体增殖物激活受体γ辅激活因子1α进一步造成线粒体损伤, NLRP3炎性小体活化和线粒体损伤之间形成恶性循环。

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:
0000-0003-2781-9436(张勇)

关键词: 组织构建, 组织工程, 低氧, 骨骼肌, NLRP3炎性小体, 线粒体, 氧化应激, 过氧化物酶体增殖物激活受体γ辅激活因子1α, 国家自然科学基金

Abstract:

BACKGROUND: Whether NOD-like receptor family, pyrin domain containing 3 (NLRP3) inflammasome is involved in hypoxia-induced skeletal muscle mitochondrial dysfunction, and the underlying mechanism remain unclear.
OBJECTIVE: To observe the effect of NLRP3 inflammasome inhibitor VX-765 on skeletal muscle mitochondrial function, and to explore the role of NLRP3 inflammasome in hypoxia-induced mitochondrial dysfunction. 
METHODS: Thirty Sprague-Dawley rats were randomly divided into three groups: normoxia, hypoxia, and hypoxia plus VX-765 groups. The rats in the hypoxia group were subjected to hypoxia exposure in normobaric hypoxic tent with 11.3% O2. The hypoxia plus VX-765 group rats were given the intraperitoneal injection of VX-765 (50 mg/kg) daily. All of the interventions lasted for 4 weeks.
RESULTS AND CONCLUSION: VX-765 in hypoxia markedly inhibited the expression of NLRP3 and apoptosis-associated speck-like protein, attenuated caspase-1 activity and interleukin-1β content, and suppressed mitochondrial H2O2 generation. In addition, VX-765 in hypoxia markedly enhanced the expression of mitochondrial peroxisome proliferator-activated receptor γ coactivator 1-α and cyclooxygenase IV, elevated mitochondrial membrane potent and ATP synthetase activity. These results indicate that hypoxia induces skeletal muscle dysfunction through activating NLRP3 inflammasome and impairing mitochondrial function. The hypoxia-induced mitochondrial dysfunction enhances reactive oxygen species generation and further triggers interleukin-1β production via the NLRP3 inflammasome activation. In turn, interleukin-1β further impairs mitochondrial function through suppresseing peroxisome proliferator-activated receptor γ coactivator 1α, resulting in a vicious circle between NLRP3 inflammasome activation and mitochondrial dysfunction.

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: Mitochondria, Aoxia, Tissue Engineering

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