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Isolation of Primary Patient-specific Aortic Smooth Muscle Cells and Semiquantitative Real-time Contraction Measurements In Vitro
Published on: February 15, 2022
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ALK7 Promotes Vascular Smooth Muscle Cells Phenotypic Modulation by Negative Regulating PPARγ Expression.
Fu-Han Gong1, Wen-Lin Cheng2, Quan Zhang3
1Department of Cardiology, Tongren Municipal People's Hospital, Tongren, China.
Journal of Cardiovascular Pharmacology
|May 30, 2020
Summary
Activin receptor-like kinase 7 (ALK7) promotes vascular smooth muscle cell (VSMC) phenotypic modulation by inhibiting PPARγ. Neutralizing ALK7 may offer a therapeutic strategy for intimal hyperplasia.
Area of Science:
- Cardiovascular Biology
- Molecular Cell Biology
Background:
- Activin receptor-like kinase 7 (ALK7), a receptor for TGF-β superfamily ligands, is implicated in cardiovascular diseases.
- The role of ALK7 in vascular smooth muscle cell (VSMC) phenotypic modulation remains unexplored.
Purpose of the Study:
- To investigate the effect and molecular mechanism of ALK7 on VSMC phenotypic modulation.
- To determine if ALK7 regulates VSMC differentiation, proliferation, and migration.
Main Methods:
- Primary mouse VSMCs were cultured and treated with platelet-derived growth factor-BB (PDGF-BB).
- ALK7 expression was analyzed, and its function was studied using knockdown and overexpression techniques.
- PPARγ expression and its role in ALK7-mediated effects were assessed.
Main Results:
- PDGF-BB treatment increased ALK7 expression and decreased VSMC differentiation markers.
- ALK7 knockdown inhibited PDGF-BB-induced VSMC phenotypic modulation, enhancing differentiation markers while reducing proliferation and migration.
- ALK7 silencing upregulated PPARγ, which was essential for the observed effects.
Conclusions:
- ALK7 positively regulates VSMC phenotypic modulation, partly by inactivating PPARγ.
- Targeting ALK7 presents a potential therapeutic strategy for intimal hyperplasia.
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