Novel mechanisms for the antifibrotic action of nintedanib
Open accessAbstract
Idiopathic pulmonary fibrosis (IPF) is a disease with relentless course and limited therapeutic options. Nintedanib (BIBF-1120) is a multiple tyrosine kinase inhibitor recently approved by the U.S. Food and Drug Administration for the treatment of IPF. The precise antifibrotic mechanism(s) of action of nintedanib, however, is not known. Therefore, we studied the effects of nintedanib on fibroblasts isolated from the lungs of patients with IPF. Protein and gene expression of profibrotic markers were assessed by Western immunoblotting and real-time PCR. Autophagy markers and signaling events were monitored by biochemical assays, Western immunoblotting, microscopy, and immunofluorescence staining. Silencing of autophagy effector proteins was achieved with small interfering RNAs. Nintedanib down-regulated protein and mRNA expression of extracellular matrix (ECM) proteins, fibronectin, and collagen 1a1 while inhibiting transforming growth factor (TGF)-β1–induced myofibroblast differentiation. Nintedanib also induced beclin-1–dependent, ATG7-independent autophagy. Nintedanib’s ECM-suppressive actions were not mediated by canonical autophagy. Nintedanib inhibited early events in TGF-β signaling, specifically tyrosine phosphorylation of the type II TGF-β receptor, activation of SMAD3, and p38 mitogen-activated protein kinase. Nintedanib down-regulates ECM production and induces noncanonical autophagy in IPF fibroblasts while inhibiting TGF-β signaling. These mechanisms appear to be uncoupled and function independently to mediate its putative antifibrotic effects.
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Nintedanib is an intracellular triple tyrosine kinase inhibitor of PDGFR α and β, FGFR 1, 2, and 3, and VEGFR 1, 2, and 3, and exerts a variety of antifibrotic effects.
“The second approved anti-fibrotic agent, nintedanib is an intracellular triple tyrosine kinase inhibitor of platelet-derived growth factor receptor (PDGFR) α and β, fibroblast growth factor receptor (FGFR) 1, 2, and 3, and vascular endothelial growth factor receptor (VEGFR) 1, 2, and 3, and also exerts a variety of antifibrotic effects (Rangarajan et al., 2016).”
From Pulmonary fibrosis: Emerging diagnostic and therapeutic strategies (2023) · cites this paper as Rangarajan et al., 2016
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Research works printed but not linked: 2
- [7]Rangarajan S, Dodson M, Zhang J, Thannickal V. Enhanced autophagy as a potential mechanism for the anti-fibrotic effects of BIBF-1120 in IPF [abstract] Am J Respir Crit Care Med. 2013;187:A5162. [Google Scholar]
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- Authors
- Rangarajan, S., Kurundkar, A., Kurundkar, D., Bernard, K., Sanders, Y. Y., Ding, Q., Antony, V. B., Zhang, J., Zmijewski, J., & Thannickal, V. J.
- Affiliations
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, and
- University of Alabama at Birmingham (US)
- Corresponding author
- Thannickal, Victor J.
- ORCID
- Venue
- American Journal of Respiratory Cell and Molecular Biology
- Publisher
- Oxford University Press (OUP)
- Published
- 2016-01-01
- Volume
- 54
- Issue
- 1
- Pages
- 51-59
- ISSN
- 1044-1549 (ISSN-L)
- 1535-4989
- PMC
- PMC4742925
- OpenAlex
- W1894287559
- Cited by
- 238
- References
- 37
- Citations by year
- 2026: 20 · 2025: 27 · 2024: 32 · 2023: 21 · 2022: 27 · 2021: 20 · 2020: 21 · 2019: 18 · 2018: 13 · 2017: 18 · 2016: 17 · 2015: 4
- FWCI
- 13.71
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- American Journal of Respiratory Cell and Molecular Biology (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute on Aging (R01AG046210)
- National Heart, Lung, and Blood Institute (R01HL085324, R01HL127338, P01HL114470, T32HL105346)
- Topics
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Pulmonary Hypertension Research and Treatments
- Keywords
- nintedanib, idiopathic pulmonary fibrosis, antifibrotic mechanism, autophagy, TGF-beta signaling, extracellular matrix, fibronectin, type I collagen, myofibroblast differentiation, Beclin-1, ATG7, Smad3, p38 MAPK, TGFBR2, lung fibroblasts, tyrosine kinase inhibitors
- MeSH terms
- Beclin-1, Autophagy-Related Protein 7, Receptor, Transforming Growth Factor-beta Type II, Collagen Type I, alpha 1 Chain, Cells, Cultured, Dose-Response Relationship, Drug, Fibronectins, Humans, Indoles, Lung, Membrane Proteins, Phosphorylation, RNA, Messenger, Time Factors, Transfection, Signal Transduction, Protein Serine-Threonine Kinases, Receptors, Transforming Growth Factor beta, Collagen Type I, RNA Interference, Ubiquitin-Activating Enzymes, p38 Mitogen-Activated Protein Kinases, Apoptosis Regulatory Proteins, Smad3 Protein, Transforming Growth Factor beta1, Idiopathic Pulmonary Fibrosis
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