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• W3048546973 abstract "Aberrant vascular smooth muscle cell (VSMC) proliferation and migration play an important role in the development of cardiovascular diseases including pulmonary arterial hypertension (PAH). MicroRNAs (miRNAs, miRs) have been considered to be implicated in the progression of PAH pathogenesis. In this study, we aim to clarify the role of miR-221 on proliferation and migration of pulmonary arterial smooth muscle cells (PASMCs) and identify the target genes involved in this biological process.PASMCs were isolated from the pulmonary arteries of male Sprague-Dawley (SD) rats. Cell proliferation of PASMCs was detected by 5-ethynyl-2'-deoxyuridine (EdU) assay. Cell migration was determined by a scratch wound assay. Quantitative real-time PCR was used to determine the expression of miR-221 while western blot analysis was used to determine the expression of TIMP3. Luciferase assay was used to confirm that TIMP3 was a direct target gene of miR-221. Monocrotaline (MCT) induced-PAH rat model was established and miR-221 and TIMP3 levels were checked in lung tissue and PASMCs from PAH rats.miR-221 was able to promote the proliferation and migration PASMCs. TIMP3 were negatively regulated by miR-221 at the protein level in PASMCs. In addition, TIMP3 was identified to be a direct target gene of miR-221 in PASMCs based on luciferase assays. TIMP3 knockdown abolished the inhibitory effect of miR-221 inhibitor on PASMCs proliferation and migration, suggesting TIMP3 mediated the effects of miR-221 in PASMCs. Finally, we found that miR-221 was increased while TIMP3 was down-regulated in PASMCs in MCT-treated rats.In conclusion, miR-221 promotes PASMCs proliferation and migration by targeting TIMP3. MiR-221 and TIMP3 could be potential therapeutic targets for the treatment of PAH." @default.
• W3048546973 created "2020-08-18" @default.
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• W3048546973 date "2020-08-01" @default.
• W3048546973 modified "2023-10-16" @default.
• W3048546973 title "MicroRNA-221 promotes proliferation and migration of pulmonary arterial smooth muscle cells (PASMCs) by targeting tissue inhibitor of metalloproteinases-3 (TIMP3)" @default.
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• W3048546973 doi "https://doi.org/10.21037/cdt-20-328" @default.
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