Carcinogenesis, Teratogenesis & Mutagenesis ›› 2024, Vol. 36 ›› Issue (1): 1-8.doi: 10.3969/j.issn.1004-616x.2024.01.001

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Involvement of hepatocyte nuclear factor-1b in lung bronchial epithelial cell injury induced by 2-chloroethyl ethyl sulfide

KONG Deqin1, LIU Sijia1,2, LIU Jianhao1,2, MA Yao1,2, MA Chengfei1,2, ZHAO Yushun1,2, ZHOU Jiaheng3, SHI Minjie1, LI Jia3, LIU Jiangzheng1   

  1. 1. Department of Military Toxicology and Chemical Defense Medicine, School of Military Preventive Medicine, Air Force Medical University/Key Laboratory of Free Radical Biology and Medicine of Shaanxi Province/Key Laboratory of Environmental Hazard Assessment and Prevention of Special Operations of Ministry of Education, Xi'an 710032;
    2. The Second Brigade of Basic Medical College, Air Force Medical University, Xi'an 710032;
    3. Department of Recuperation and Rehabilitation for Flight Personnel, School of Aerospace Medicine, Air Force Medical University, Xi'an 710032, Shaanxi, China
  • Received:2023-06-30 Revised:2023-10-19 Online:2024-02-19 Published:2024-02-19

Abstract: OBJECTIVE: To investigate the involvement of hepatocyte nuclear factor-1b(HNF-1b) in human lung bronchial epithelial cell injury induced by a blister agent, 2-chloroethyl ethyl sulfide(CEES).METHODS: The human BEAS-2B cells were treated in culture with various concentrations(0, 0.4, 0.6, 0.8, 1.0 and 1.2 mmol/L) of CEES for 24 h. The CCK-8 method was used to detect cell viability, and cell morphology was observed under light microscope. The DCFH-DA and MitoSOX fluorescent probes were used to detect total reactive oxygen species(ROS) and mitochondrial ROS levels, respectively. The protein expression of HNF-1b was assessed by Western blot. A BEAS-2B cell line which overexpresses HNF-1b was constructed by lentiviral infection. After exposure to 1 mmol/L CEES for 24 h, cell viability was determined by the CCK-8 method; apoptosis rate was detected by Annexin V-FITC/PI double staining method; mitochondrial ROS and whole-cell ROS levels were measured by MitoSOX and DHE probes, and mitochondrial membrane potential was detected by JC-1 staining. RESULTS: After exposure of BEAS-2B to 0.6-1.2 mmol/L CEES and compared to the controls, cell viability was reduced(P<0.01), cell morphology showed damage, the levels of total ROS and mitochondrial ROS were increased(P<0.01), and HNF-1b protein expression was significantly down-regulated(P<0.01). After exposure of the cells with over-expressed HNF-1b, the cell viability was significantly increased(P<0.01), apoptosis rate was decreased(P<0.01), mitochondrial membrane potential damage was relieved, and the levels of mitochondrial ROS and total whole-cell ROS were significantly decreased(P<0.01). CONCLUSION: Exposure of the regular BEAS-2B cells to CEES reduced the expression of HNF-1b and caused extensive damage. However, overexpression of HNF-1b in the BEAS-2B cells reduced the CEES-induced cellular damage, apoptosis and mitochondrial dysfunction. These results suggest that the protective effect of HNF-1b may mediated by antioxidation, and activation of HNF-1b may be a new strategy for the treatment of blister agent toxicity.

Key words: blister agent, 2-chloroethyl ethyl sulfide, hepatocyte nuclear factor-1b, BEAS-2B cells, oxidative stress

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