miR-34a Inhibits Lung Fibrosis by Inducing Lung Fibroblast Senescence
Open accessAbstract
Cellular senescence has been implicated in diverse pathologies. However, there is conflicting evidence regarding the role of this process in tissue fibrosis. Although dysregulation of microRNAs is a key mechanism in the pathogenesis of lung fibrosis, it is unclear whether microRNAs function by regulating cellular senescence in the disease. In this study, we found that miR-34a demonstrated greater expression in the lungs of patients with idiopathic pulmonary fibrosis and in mice with experimental pulmonary fibrosis, with its primary localization in lung fibroblasts. More importantly, miR-34a was up-regulated significantly in both human and mouse lung myofibroblasts. We found that mice with miR-34a ablation developed more severe pulmonary fibrosis than did wild-type animals after fibrotic lung injury. Mechanistically, we found that miR-34a induced a senescent phenotype in lung fibroblasts because this microRNA increased senescence-associated β-galactosidase activity, enhanced expression of senescence markers, and decreased cell proliferative capacities. Consistently, we found that primary lung fibroblasts from fibrotic lungs of miR-34a–deficient mice had a diminished senescent phenotype and enhanced resistance to apoptosis as compared with those from wild-type animals. We also identified multiple miR-34a targets that likely mediated its activities in inducing senescence in lung fibroblasts. In conclusion, our data suggest that miR-34a functions through a negative feedback mechanism to restrain fibrotic response in the lungs by promoting senescence of pulmonary fibroblasts.
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Epithelial cell senescence is detrimental, whereas fibroblast senescence is protective.
“indicating that epithelial cell senescence is indeed detrimental, whereas fibroblast senescence is protective.”
From Senolytic drugs target alveolar epithelial cell function and attenuate experimental lung fibrosis <i>ex vivo</i> (2017) · cites this paper as [23]
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Cited by
Sorted by citations
Senolytics in idiopathic pulmonary fibrosis: Results from a first-in-human, open-label, pilot study
Justice, J. N., Nambiar, A. M., Tchkonia, T., LeBrasseur, N. K., Pascual, R., Hashmi, S. K., Prata, L., Masternak, M. M., Kritchevsky, S. B., Musi, N., et al. (2019) · EBioMedicine · doi:10.1016/j.ebiom.2018.12.052 · Cited by 1,261 · see citing works
“For example, miRNAs miR-146a-5p andmiR-34a-5p have recently has been acknowledged as part of SASP in a mousemodel of lung fibrosis and long-lived dwarf mice [34,35].”
BackgroundLehmann, M., Korfei, M., Mutze, K., Klee, S., Skronska-Wasek, W., Alsafadi, H. N., Ota, C., Costa, R., Schiller, H. B., Lindner, M., et al. (2017) · European Respiratory Journal · doi:10.1183/13993003.02367-2016 · Cited by 403 · see citing works
MicroRNA controls of cellular senescence
Suh, N. (2018) · BMB Reports · doi:10.5483/bmbrep.2018.51.10.209 · Cited by 78 · see citing works
miR-34a promotes fibrosis in aged lungs by inducing alveolarepithelial dysfunctions
Cui, H., Ge, J., Xie, N., Banerjee, S., Zhou, Y., Liu, R.-M., Thannickal, V. J., & Liu, G. (2017) · American Journal of Physiology-Lung Cellular and Molecular Physiology · doi:10.1152/ajplung.00335.2016 · Cited by 66 · see citing works
Self-citation
- Authors
- Cui, H., Ge, J., Xie, N., Banerjee, S., Zhou, Y., Antony, V. B., Thannickal, V. J., & Liu, G.
- Affiliations
- University of Alabama at Birmingham (US)
- Corresponding author
- Liu, Gang
- Venue
- American Journal of Respiratory Cell and Molecular Biology
- Publisher
- Oxford University Press (OUP)
- Published
- 2017-02-01
- Volume
- 56
- Issue
- 2
- Pages
- 168-178
- ISSN
- 1044-1549 (ISSN-L)
- 1535-4989
- PMC
- PMC5359651
- OpenAlex
- W2520496393
- Cited by
- 104
- References
- 10
- Citations by year
- 2026: 6 · 2025: 5 · 2024: 4 · 2023: 15 · 2022: 8 · 2021: 8 · 2020: 21 · 2019: 16 · 2018: 10 · 2017: 9 · 2016: 2
- FWCI
- 11.03
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- American Journal of Respiratory Cell and Molecular Biology (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Heart, Lung, and Blood Institute (R01HL126737, R01HL124076, R01HL105473, R35HL135830, P01HL114470)
- Topics
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
- Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
- Keywords
- miR-34a, pulmonary fibrosis, idiopathic pulmonary fibrosis, cellular senescence, lung fibroblasts, myofibroblasts, microRNA, senescence-associated β-galactosidase, apoptosis resistance, miRNA target genes, negative feedback regulation
- MeSH terms
- Animals, Cell Differentiation, Fibroblasts, Humans, Lung, Mice, Inbred C57BL, Up-Regulation, Cellular Senescence, Apoptosis, MicroRNAs, Transforming Growth Factor beta1, Idiopathic Pulmonary Fibrosis, Gene Knockdown Techniques, Myofibroblasts
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