Distinct Characteristics Between Perivascular and Subcutaneous Adipose-Derived Stem Cells

Area of Science:

• Stem Cell Biology
• Vascular Biology
• Cellular Heterogeneity

Background:

• Adipose-derived stem cells (ADSCs) are known for their vascular differentiation potential and role in vascular remodeling.
• Perivascular ADSCs (PV-ADSCs), due to their specific anatomical niche, warrant investigation into their unique properties.
• While heterogeneity in subcutaneous (SUB) and abdominal ADSCs is documented, PV-ADSC heterogeneity remains unexplored.

Purpose of the Study:

• To investigate the heterogeneity of PV-ADSCs by comparing their subpopulations, functions, and cell fates.
• To compare PV-ADSCs with SUB-ADSCs at a single-cell level.
• To identify distinct characteristics and potential functional roles of PV-ADSC subpopulations.

Main Methods:

• Single-cell analysis was employed to compare SUB-ADSCs and PV-ADSCs.
• Identification and characterization of distinct PV-ADSC subpopulations.
• Analysis of cell functions and differentiation potential.

Main Results:

• Four distinct subpopulations of PV-ADSCs were identified: Dpp4+, Col4a2+/Icam1+, Clec11a+/Cpe+, and Sult1e1+ cells.
• The Clec11a+ subpopulation was found to potentially regulate PV-ADSC differentiation towards a smooth muscle cell (SMC) phenotype.
• Significant differences in characteristics were observed between PV-ADSCs and SUB-ADSCs.

Conclusions:

• PV-ADSCs exhibit significant cellular heterogeneity with distinct subpopulations.
• The Clec11a+ PV-ADSC subpopulation may play a crucial role in smooth muscle cell differentiation.
• This study reveals novel insights into the unique biology of PV-ADSCs compared to their subcutaneous counterparts.