Summary
Cigarette smoke is associated with the development of several diseases, such as chronic obstructive pulmonary disease (COPD). The purpose of this study was to investigate genotoxicity and heat shock protein 70 (Hsp70) in human airway smooth muscle cells (HASMCs) exposed to cigarette smoke extract (CSE). HASMCs was exposed to CSE with different doses for 24 h. The level of 8-hydroxydeoxyguanosine (8-OHdG) was determined by using HPLC-ECD, the DNA damage was analyzed by using comet assay, and apoptosis was examined by using Annexin-FITC/PI staining. The production of Hsp70 after CSE stimulation was tested. Results indicated that CSE significantly increased the level of 8-OHdG, DNA damage and cell apoptosis, and reduced the production of Hsp70. In particular, levels of Hsp70 were inversely correlated with 8-OHdG, DNA damage and cell apoptosis. It was concluded that cigarette smoke induced genotoxicity and decreased the production of cell protective protein Hsp70, which may contribute to the development of some airway diseases.
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This project was supported by grants from the National Natural Science Foundation of China (No.81070036, 81370145, 81370156 and 81070021), The National Key Technology R&D Program of the 12th National Five-year Development Plan: Clinical Study on Translational Medicine of Respiratory Disease (No. 212BA105B01), The Specific Project of National Health Research Project of Ministry of Health of China (No. 201002008) and Program for Changjiang Scholars and Innovative Research Team in University (No. PCSIRT1131).
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Wu, Xj., Luo, Gx., Zeng, X. et al. Genotoxicity and reduced heat shock protein 70 in human airway smooth muscle cells exposed to cigarette smoke extract. J. Huazhong Univ. Sci. Technol. [Med. Sci.] 33, 827–833 (2013). https://doi.org/10.1007/s11596-013-1206-8
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DOI: https://doi.org/10.1007/s11596-013-1206-8