Vascular stem/progenitor cells: current status of the problem.

Area of Science:

• Regenerative Medicine
• Vascular Biology
• Stem Cell Research

Background:

• Post-natal vascular walls harbor stem/progenitor cells vital for angiogenesis and regeneration.
• Four key populations exist: mesenchymal stem cells, pericytes, endothelial progenitor cells, and smooth muscle progenitor cells.

Purpose of the Study:

• To investigate the role and distribution of vascular-resident stem/progenitor cells.
• To understand their contribution to vascular repair and disease susceptibility.

Main Methods:

• Analysis of stem/progenitor cell populations within vascular walls.
• Investigation of stem cell niche locations, particularly in the adventitia.
• Assessment of cell distribution heterogeneity across the vasculature.

Main Results:

• Vascular stem/progenitor cells are crucial for vessel repair and regeneration.
• These cells are concentrated in specific niches, primarily the adventitia.
• Non-uniform distribution across vessel walls and the circulatory system was observed.

Conclusions:

• Heterogeneous distribution of vascular progenitors may explain varied regional susceptibility to chronic vascular diseases like atherosclerosis.
• Adult vascular resident progenitors can exert both beneficial and detrimental effects in cardiovascular pathology.