Document Type

Article

Publication Date

2021

Publication Title

International Journal of Molecular Sciences

Volume

22

Issue

11

Pages

1-16

DOI

10.3390/ijms22115909

Abstract

We developed two models of chemically induced chronic lung injury and pulmonary fibrosis in mice (intratracheally administered hydrochloric acid (HCl) and intratracheally administered nitrogen mustard (NM)) and investigated male-female differences. Female mice exhibited higher 30-day survival and less weight loss than male mice. Thirty days after the instillation of either HCl or NM, bronchoalveolar lavage fluid displayed a persistent, mild inflammatory response, but with higher white blood cell numbers and total protein content in males vs. females. Furthermore, females exhibited less collagen deposition, milder pulmonary fibrosis, and lower Ashcroft scores. After instillation of either HCl or NM, all animals displayed increased values of phosphorylated (activated) Heat Shock Protein 90, which plays a crucial role in the alveolar wound-healing processes; however, females presented lower activation of both transforming growth factor-β (TGF-β) signaling pathways: ERK and SMAD. We propose that female mice are protected from chronic complications of a single exposure to either HCl or NM through a lesser activation of TGF-β and downstream signaling. The understanding of the molecular mechanisms that confer a protective effect in females could help develop new, gender-specific therapeutics for IPF.

Comments

© 2021 The Authors

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Publisher's version available at: https://doi.org/10.3390/ijms22115909

Original Publication Citation

Solopov, P., Colunga Biancatelli, R. M. L., Dimitropoulou, C., & Catravas, J. D. (2021). Sex-related differences in murine models of chemically induced pulmonary fibrosis. International Journal of Molecular Sciences, 22(11), Article 5909, 1-16. https://doi.org/10.3390/ijms22115909

ORCID

0000-0002-1705-027X (Solopov), 0000-0002-1174-3876 (Biancatelli),

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