title: Peroxiredoxin 6 suppresses Muc5ac overproduction in LPS-induced airway inflammation through H2O2-EGFR-MAPK signaling pathway.
abstract: Mucus hypersecretion is a prominent mechanism in airway inflammation. Muc5ac is a major component of mucus and can be activated by reactive oxygen species (ROS). Peroxiredoxin 6 (Prdx6) highly expresses in airway epithelium and protects the airway from oxidative stress. In this study, we investigated the roles of Prdx6 in lipopolysaccharide (LPS)-induced mucin production in mice. We found that the levels of H2O2and the Muc5ac mRNA were significantly increased in Prdx6 (-/-) mice compared to those in C57BL/6J mice after LPS instillation, which were markedly inhibited by epithelial growth factor receptor (EGFR) inhibitor Elrotinib. In vitro studies showed that mRNA levels of Prdx6 were decreased while H2O2and Muc5ac were increased in a dose-dependent manner after LPS exposure, with significant increase in Prdx6 knockdown bronchial epithelial cells compared with those in normal epithelial cells. LPS-induced Muc5ac release was significantly inhibited by EGFR inhibitor, p38 inhibitor and JNK inhibitor, but not ERK1/2 inhibitor, indicating that the H2O2-EGFR-MAPK pathway is likely involved in the responses. This study indicated that Prdx6 decreased LPS-induced Muc5ac increase and played important roles in mucin hypersecretion after LPS exposure.
authors.affiliation: Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Yang
authors.affiliation: Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China.
authors.forename: Meiling
authors.initials: M
authors.lastname: Jin
authors.affiliation: Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China.
authors.forename: Chunxue
authors.initials: C
authors.lastname: Bai
authors.affiliation: Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China. Electronic address: zhou.jian@fudan.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Department of Pulmonary Medicine, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, China. Electronic address: shen.yao@zs-hospital.sh.cn.
authors.forename: Yao
authors.initials: Y
authors.lastname: Shen
mesh_terms: D000818:Animals; D018893:Bronchoalveolar Lavage; D004195:Disease Models, Animal; D004791:Enzyme Inhibitors / Q000494:pharmacology; D004848:Epithelium / Q000187:drug effects / Q000378:metabolism; D066246:ErbB Receptors / Q000235:genetics / Q000378:metabolism; D005786:Gene Expression Regulation / Q000187:drug effects / Q000502:physiology*; D006861:Hydrogen Peroxide / Q000378:metabolism; D007249:Inflammation / Q000139:chemically induced / Q000473:pathology*; D008070:Lipopolysaccharides / Q000633:toxicity; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D020929:Mitogen-Activated Protein Kinase Kinases / Q000235:genetics / Q000378:metabolism; D055271:Mucin 5AC / Q000235:genetics / Q000378:metabolism*; D054465:Peroxiredoxin VI / Q000172:deficiency* / Q000235:genetics; D017382:Reactive Oxygen Species / Q000378:metabolism; D020545:Respiratory Mucosa / Q000187:drug effects / Q000378:metabolism*; D015398:Signal Transduction / Q000235:genetics / Q000502:physiology
chemical_list: D004791:Enzyme Inhibitors; D008070:Lipopolysaccharides; C524679:Muc5ac protein, mouse; D055271:Mucin 5AC; D017382:Reactive Oxygen Species; D006861:Hydrogen Peroxide; D054465:Peroxiredoxin VI; C515983:Prdx6 protein, mouse; C541485:EGFR protein, mouse; D066246:ErbB Receptors; D020929:Mitogen-Activated Protein Kinase Kinases
keywords: Airway inflammation; Epithelial growth factor receptor; Mitogen-activated protein kinase; Muc5ac; Peroxiredoxin 6