Abstract
Pulmonary fibrosis is a kind of pulmonary disorder with chronic inflammation and excessive collagen deposition, and its etiology is not clear. Interleukin (IL)-38 is a new member of IL-1 family cytokines, but its role in pulmonary fibrosis has not been elucidated. In this study, a lentivirus expressing IL-38 was injected into the nasal cavity of mice with bleomycin-induced pulmonary fibrosis. We found that IL-38 overexpression reduced the body weight loss and improved the survival of mice induced by bleomycin. Furthermore, IL-38 expression attenuated the pulmonary inflammation and fibrosis damage induced by bleomycin, decreased the production of pro-inflammatory and pro-fibrotic cytokines such as IL-1β, IL-6, IL-17A, monocyte chemoattractant protein-1, and tumor necrosis factor-α, but increased the release of anti-inflammatory cytokine IL-1 receptor antagonist (IL-1Ra) in the lungs of bleomycin-challenged mice. Our data suggest that IL-38 may inhibit bleomycin-induced pulmonary inflammation and fibrosis through its anti-inflammatory effect and regulation of IL-1β/IL-1Ra balance, and IL-38 may be a new strategy for the treatment of pulmonary fibrosis.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (81970735), Natural Science Foundation of Zhejiang Province (LY17H010001, LY18H010003), and sponsored by K.C. Wong Magna Fund in Ningbo University.
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Zhiwei Xu and Xianli Yuan contributed equally to this work. Z.X. and X.Y. performed the molecular biological and animal studies, and wrote the manuscript; Q.G. performed the biochemical analysis and ELISA; Y.L. and M.L. conceived the study, performed the data analysis, and revised the manuscript; and all authors reviewed and approved the final manuscript. All data were generated in-house and that no paper mill was used.
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All animal procedures were in accordance with the Guide for the Care and Use of Laboratory Animals (8th edition, NIH) and approved by The Laboratory Animal Ethics Committee of Ningbo University School of Medicine.
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Xu, Z., Yuan, X., Gao, Q. et al. Interleukin-38 overexpression prevents bleomycin-induced mouse pulmonary fibrosis. Naunyn-Schmiedeberg's Arch Pharmacol 394, 391–399 (2021). https://doi.org/10.1007/s00210-020-01920-3
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DOI: https://doi.org/10.1007/s00210-020-01920-3