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miRNAs through β-ARR2/p-ERK1/2 pathway regulate the VSMC proliferation and migration
Ghasem Ghasempour1, Asghar Mohammadi2, Fahimeh Zamani-Garmsiri3
1Clinical Biochemistry Department, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran; Student Research Committee, Iran university of Medical Sciences, Tehran, Iran.
Life Sciences
|June 10, 2021
Summary
MicroRNAs miR-181b and miR-204 inhibit vascular smooth muscle cell proliferation and migration by downregulating β-arrestin 2 and p-ERK1/2. This pathway presents a potential therapeutic target for atherosclerosis.
Area of Science:
- Cardiovascular Biology
- Molecular Biology
- Cell Biology
Background:
- MicroRNAs (miRNAs) play a role in atherosclerosis and vessel restenosis.
- Investigated the impact of miR-599, miR-204, and miR-181b on vascular smooth muscle cell (VSMC) behavior.
- Examined the involvement of TGFβR2, β-ARR2, SMAD2, and ERK1/2 signaling pathways.
Purpose of the Study:
- To elucidate the role of specific miRNAs in regulating VSMC proliferation and migration.
- To identify the molecular mechanisms underlying miRNA-mediated effects on VSMCs.
- To explore potential therapeutic targets for atherosclerosis based on miRNA activity.
Main Methods:
- Bioinformatic prediction of target genes and miRNAs.
- Transfection of VSMCs with PEI-miRNA complexes (miR-599, miR-204, miR-181b).
- Quantification of gene and protein expression using real-time RT-PCR and Western blotting.
- Assessment of VSMC proliferation and migration via MTT and scratch assays.
Main Results:
- miR-181b and miR-204 significantly downregulated β-arrestin 2 (β-ARR2) and p-ERK1/2 expression.
- TGFβR2 and p-SMAD2 levels were not significantly affected by miR-181b and miR-204.
- Both miR-181b and miR-204 markedly inhibited VSMC proliferation and migration.
- miR-599 also inhibited VSMC proliferation and migration but did not significantly alter β-ARR2 or TGFβR2 expression.
Conclusions:
- The inhibitory effects of miR-181b and miR-204 on VSMC proliferation and migration are mediated via the β-ARR2/p-ERK1/2 pathway.
- This pathway is implicated in plaque growth in atherosclerosis.
- The β-ARR2/p-ERK1/2 pathway represents a potential therapeutic target for treating atherosclerosis.
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