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Mitochondrial ROS and NLRP3 inflammasome in acute ozone-induced murine model of airway inflammation and bronchial hyperresponsiveness.

Publication ,  Journal Article
Xu, M; Wang, L; Wang, M; Wang, H; Zhang, H; Chen, Y; Wang, X; Gong, J; Zhang, JJ; Adcock, IM; Chung, KF; Li, F
Published in: Free radical research
July 2019

Oxidative stress is a key mechanism underlying ozone-induced lung injury. Mitochondria can release mitochondrial reactive oxidative species (mtROS), which may lead to the activation of NLRP3 inflammasome. The goal of this study was to examine the roles of mtROS and NLRP3 inflammasome in acute ozone-induced airway inflammation and bronchial hyperresponsiveness (BHR). C57/BL6 mice (n = 8/group) were intraperitoneally treated with vehicle (phosphate buffered saline, PBS) or mitoTEMPO (mtROS inhibitor, 20 mg/kg), or orally treated with VX-765 (caspse-1 inhibitor, 100 mg/kg) 1 h before the ozone exposure (2.5 ppm, 3 h). Compared to the PBS-treated ozone-exposed mice, mitoTEMPO reduced the level of total malondialdehyde in bronchoalveolar lavage (BAL) fluid and increased the expression of mitochondrial complexes II and IV in the lung 24 h after single ozone exposure. VX-765 inhibited ozone-induced BHR, BAL total cells including neutrophils and eosinophils, and BAL inflammatory cytokines including IL-1α, IL-1β, KC, and IL-6. Both mitoTEMPO and VX-765 reduced ozone-induced mtROS and inhibited capase-1 activity in lung tissue whilst VX-765 further inhibited DRP1 and MFF expression, increased MFN2 expression, and down-regulated caspase-1 expression in the lung tissue. These results indicate that acute ozone exposure induces mitochondrial dysfunction and NLRP3 inflammasome activation, while the latter has a critical role in the pathogenesis of ozone-induced airway inflammation and BHR.

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Published In

Free radical research

DOI

EISSN

1029-2470

ISSN

1071-5762

Publication Date

July 2019

Volume

53

Issue

7

Start / End Page

780 / 790

Related Subject Headings

  • Reactive Oxygen Species
  • NLR Family, Pyrin Domain-Containing 3 Protein
  • Mitochondria
  • Mice
  • Male
  • Inflammation
  • Inflammasomes
  • Disease Models, Animal
  • Bronchial Hyperreactivity
  • Biochemistry & Molecular Biology
 

Citation

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MLA
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Xu, M., Wang, L., Wang, M., Wang, H., Zhang, H., Chen, Y., … Li, F. (2019). Mitochondrial ROS and NLRP3 inflammasome in acute ozone-induced murine model of airway inflammation and bronchial hyperresponsiveness. Free Radical Research, 53(7), 780–790. https://doi.org/10.1080/10715762.2019.1630735
Xu, Mengmeng, Lei Wang, Muyun Wang, Hanying Wang, Hai Zhang, Yuqing Chen, Xiaohui Wang, et al. “Mitochondrial ROS and NLRP3 inflammasome in acute ozone-induced murine model of airway inflammation and bronchial hyperresponsiveness.Free Radical Research 53, no. 7 (July 2019): 780–90. https://doi.org/10.1080/10715762.2019.1630735.
Xu M, Wang L, Wang M, Wang H, Zhang H, Chen Y, et al. Mitochondrial ROS and NLRP3 inflammasome in acute ozone-induced murine model of airway inflammation and bronchial hyperresponsiveness. Free radical research. 2019 Jul;53(7):780–90.
Xu, Mengmeng, et al. “Mitochondrial ROS and NLRP3 inflammasome in acute ozone-induced murine model of airway inflammation and bronchial hyperresponsiveness.Free Radical Research, vol. 53, no. 7, July 2019, pp. 780–90. Epmc, doi:10.1080/10715762.2019.1630735.
Xu M, Wang L, Wang M, Wang H, Zhang H, Chen Y, Wang X, Gong J, Zhang JJ, Adcock IM, Chung KF, Li F. Mitochondrial ROS and NLRP3 inflammasome in acute ozone-induced murine model of airway inflammation and bronchial hyperresponsiveness. Free radical research. 2019 Jul;53(7):780–790.

Published In

Free radical research

DOI

EISSN

1029-2470

ISSN

1071-5762

Publication Date

July 2019

Volume

53

Issue

7

Start / End Page

780 / 790

Related Subject Headings

  • Reactive Oxygen Species
  • NLR Family, Pyrin Domain-Containing 3 Protein
  • Mitochondria
  • Mice
  • Male
  • Inflammation
  • Inflammasomes
  • Disease Models, Animal
  • Bronchial Hyperreactivity
  • Biochemistry & Molecular Biology