ReferenceID 6242
Stearic acid attenuates profibrotic signalling in idiopathic pulmonary fibrosis
Respirology
BACKGROUND AND OBJECTIVE: Lipid metabolism dysregulation has been implicated in the pathogenesis of IPF; however, the roles of most lipid metabolites in lung fibrosis remain unexplored. Therefore, we aimed to identify ch
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Record Fields
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- Reference Id
- 6242
- Evidence Id
- 22832
- Core Evidence Id
- 22832
- Source Reference Id
- 5763
- Herb2 Reference Id
- HBREF006560
- Subject Paper Key
- HBIN044730_33025706
- Pubmed Id
- 33025706
- Doi
- 10.1111/resp.13949
- Paper Title
- Stearic acid attenuates profibrotic signalling in idiopathic pulmonary fibrosis
- Paper Abstract
- BACKGROUND AND OBJECTIVE: Lipid metabolism dysregulation has been implicated in the pathogenesis of IPF; however, the roles of most lipid metabolites in lung fibrosis remain unexplored. Therefore, we aimed to identify changes in lipid metabolites in the lung tissues of IPF patients and determine their roles in pulmonary fibrosis. METHODS: Free fatty acids in the lung tissues of IPF patients and controls were quantified using a metabolomic approach. The roles of free fatty acids in fibroblasts or epithelial cells treated with TGF-beta1 were evaluated using fibrotic markers. The antifibrotic role of stearic acid was also assessed in a bleomycin-induced lung fibrosis mouse model. Protein levels in cell lysates or tissues were measured by western blotting. RESULTS: The levels of stearic acid were lower in IPF lung tissues than in control lung tissues. Stearic acid significantly reduced TGF-beta1-induced alpha-SMA and collagen type 1 expression in MRC-5 cells. Furthermore, stearic acid decreased the levels of p-Smad2/3 and ROS in MRC-5 cells treated with TGF-beta1 and disrupted TGF-beta1-induced EMT in Beas-2B cells. Stearic acid reduced the levels of bleomycin-induced hydroxyproline in a mouse model. CONCLUSION: Changes in the free fatty acid profile, including low levels of stearic acid, were observed in IPF patients. Stearic acid may exert antifibrotic activity by regulating profibrotic signalling.
- Journal
- Respirology
- Publish Year
- 2021
- Experiment Subject
- mouse; patient; beas-2b cells; mrc-5 cells
- Experiment Type
- Animal & Cell Experiment
- Phenotype Related
- Lung Fibrosis; Pulmonary Fibrosis
- Paper Title Cn
- Paper Title En
- Stearic acid attenuates profibrotic signalling in idiopathic pulmonary fibrosis
- Bilingual Status
- semi_complete