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Sun R, Zhao N, Wang Y, Su Y, Zhang J, Wang Y, Yu Y, Wang G, Wang Z, Xie K. High concentration of hydrogen gas alleviates Lipopolysaccharide-induced lung injury via activating Nrf2 signaling pathway in mice. Int Immunopharmacol 2021; 101:108198. [PMID: 34634688 DOI: 10.1016/j.intimp.2021.108198] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 09/15/2021] [Accepted: 09/23/2021] [Indexed: 01/02/2023]
Abstract
BACKGROUND AND AIMS The lung is the first organ to fail in sepsis. Our previous studies have proven that 2% molecular hydrogen (H2) inhalation remain a protective effect on a septic animal model via its anti-inflammatory and anti-apoptosis properties. This current research aims to observe the therapeutic effect of high concentration hydrogen (67%, HCH) on lipopolysaccharide (LPS) induced acute lung injury (ALI), and further investgate the role of Nrf2 signaling pathway. METHODS ALI model was induced by LPS areosol inhalation. HCH were treated for 1 h at 1 and 6 h after modelling. Lung tissues and bronchoalveolar lavage fluid (BALF) were collected 4 and 24 h after the exposure of LPS. The histological scores, wet/dry weight ratios, myeloperoxidase (MPO) activity, protein content and cytokine levels in BALF, apoptosis condition of lung cells, expression of Nrf2 and NF-κB were assessed in both wild type and Nrf2-knockout mice. RESULTS HCH Inhalation significantly alleviated LPS-induced pathological alterations of lung, and reduced the protein concentration, the wet/dry weight ratio, and the MPO activity of lung tissue. HCH Inhalation improved LPS-induced increasement in caspase-3 activity and the number of TUNEL-positive cells. HCH inhalation attenuated the LPS induced increased total cell content and polymorphonuclear granulocyte content, and pro-inflammatory cytokines, Nrf2 and NF-κB expression. HCH could not produce protective effct in Nrf2-knockout mice. CONCLUSION HCH can effectively alleviate LPS-induced ALI, which may be related to activation of Nrf2 signaling pathway and inhibition of inflammatory response and cell apoptosis mediated by NF-κB.
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Affiliation(s)
- Ruiqiang Sun
- Department of Anesthesiology, Tianjin Eye Hospital, Tianjin 300020, China; Department of Anesthesiology, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Nan Zhao
- Department of Anesthesiology, Tianjin Chest Hospital, Tianjin 300222, China
| | - Yuzun Wang
- Department of Anesthesiology, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Yanchao Su
- Department of Critical Care Medicine, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Jiayan Zhang
- Department of Critical Care Medicine, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Yaoqi Wang
- Department of Anesthesiology, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Yonghao Yu
- Department of Anesthesiology, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Guolin Wang
- Department of Anesthesiology, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Zhen Wang
- Department of Anesthesiology, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China.
| | - Keliang Xie
- Department of Anesthesiology, Tianjin Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Department of Critical Care Medicine, Tianjin Medical University General Hospital, Tianjin 300052, China; Translational Research Institute of Intensive Care Medicine, College of Anesthesiology, Weifang Medical University, Weifang 261053, Shandong Province, China.
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