Chinese Journal of Tissue Engineering Research ›› 2017, Vol. 21 ›› Issue (28): 4512-4517.doi: 10.3969/j.issn.2095-4344.2017.28.014

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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

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

CLC Number: