Targeting smooth muscle cell phenotypic switching in vascular disease

Area of Science:

• Cardiovascular Biology
• Cellular Plasticity
• Vascular Medicine

Background:

• Vascular smooth muscle cell (VSMC) phenotypic plasticity is crucial for blood vessel growth and repair.
• This plasticity also underlies cardiovascular pathologies such as intimal hyperplasia and atherosclerosis.
• Recent technological advancements have significantly enhanced our understanding of VSMC biology.

Purpose of the Study:

• To review the mechanisms governing VSMC phenotypic modulation.
• To explore how these mechanisms can be therapeutically targeted for cardiovascular benefit.
• To highlight recent discoveries relevant to intimal hyperplasia and restenosis.

Main Methods:

• Comprehensive literature search of PubMed (2001-2020).
• Keywords included VSMCs, restenosis, intimal hyperplasia, phenotypic switching, and drug-eluting stents.
• Focus on identifying druggable pathways and landmark studies.

Main Results:

• Lineage tracing shows VSMCs dedifferentiate to form lesions in intimal hyperplasia and atherosclerosis.
• Single-cell transcriptomics reveals diverse VSMC phenotypes in disease.
• Identified key epigenetic, transcriptional, and integrin-mediated pathways influencing VSMC plasticity.
• Current drug-eluting stents show efficacy but challenges remain in peripheral and diabetic revascularization.

Conclusions:

• Understanding VSMC plasticity mechanisms is key to developing novel treatments.
• Targeting identified pathways (epigenetic, transcriptional, integrin-mediated) shows therapeutic potential.
• New approaches are needed to address limitations in current revascularization strategies.