Abstract | BACKGROUND: Cardiac fibrosis characterized with the aberrant proliferation of cardiac fibroblasts and extracellular matrix (ECM) deposition is a major pathophysiological feature of atrial fibrillation (AF). Liraglutide has exerted an alleviative role in various cardiovascular diseases, and can also regulate the level of microRNAs ( miRNAs). It has been reported that miR-21 modulated cardiac fibrosis in AF. However, the regulative effect of liraglutide on atrial fibrosis via miR-21 and the underlying mechanism are still unclear. METHODS: The atrial fibroblasts were isolated from the heart of C57BL/6 mice, and treated with Angiotensin II (AngII) and liraglutide. The proliferation, migration, and ECM deposition were determined by cell counting Kit-8 (CCK-8), Brdu, transwell assay, cell scratch, reverse transcription-quantitative polymerase chain reaction (RT-qPCR), western blot and immunofluorescence. The underlying mechanism was explored after transfection of miR-21 mimics into cells. RESULTS:
Liraglutide inhibited proliferation, migration, invasion of fibroblast cell and ECM deposition in AngII-stimulated cardiac fibroblasts. Additionally, liraglutide decreased the AngII-induced increase in the expression level of miR-21, but enhanced the expression of phosphatase and tensin homolog (PTEN), a target of miR-21, thereby suppressing the phosphoinositide 3-kinase (PI3K)/AKT signaling pathway. Rescue assay confirmed that overexpression of miR-21 counteracted the ameliorative effect of liraglutide on the proliferation, migration, invasion and ECM deposition in fibroblasts stimulated by AngII. CONCLUSIONS:
Liraglutide dampened AngII-induced proliferation and migration, and ECM deposition of cardiac fibroblast via modulating miR-21/PTEN/PI3K pathway.
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Authors | Jun Wang, Run Guo, Xiaoli Ma, Ying Wang, Qianyu Zhang, Nan Zheng, Jun Zhang, Chenchen Li |
Journal | Cell and tissue banking
(Cell Tissue Bank)
Vol. 24
Issue 1
Pg. 125-137
(Mar 2023)
ISSN: 1573-6814 [Electronic] Netherlands |
PMID | 35792987
(Publication Type: Journal Article)
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Copyright | © 2022. The Author(s), under exclusive licence to Springer Nature B.V. |
Chemical References |
- Phosphatidylinositol 3-Kinase
- Phosphatidylinositol 3-Kinases
- Angiotensin II
- Liraglutide
- Proto-Oncogene Proteins c-akt
- MicroRNAs
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Topics |
- Mice
- Animals
- Phosphatidylinositol 3-Kinase
(metabolism, pharmacology)
- Phosphatidylinositol 3-Kinases
(metabolism, pharmacology)
- Angiotensin II
(metabolism, pharmacology)
- Liraglutide
(metabolism, pharmacology)
- Proto-Oncogene Proteins c-akt
(metabolism, pharmacology)
- Mice, Inbred C57BL
- MicroRNAs
- Extracellular Matrix
(metabolism)
- Cell Proliferation
- Fibroblasts
(metabolism)
- Fibrosis
- Cell Movement
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