Bone marrow- and subcutaneous adipose tissue-derived mesenchymal stem cells: differences and similarities

Area of Science:

• Regenerative Medicine
• Stem Cell Biology
• Tissue Engineering

Background:

• Mesenchymal stem cells (MSCs) are crucial for therapeutic applications.
• Bone marrow (BM) and adipose tissue (Ad) are primary MSC sources.
• Comparative functional analysis of MSCs from different tissues is limited.

Purpose of the Study:

• To compare functional properties of MSCs from BM and Ad in adult donors.
• To evaluate immunophenotype, secretion profiles, and differentiation potential.
• To assess senescence onset and proliferative capacity.

Main Methods:

• Cultured MSCs from 43 adult donors (BM-MSC and Ad-MSC).
• Assessed immunophenotype, growth factors (VEGF, SDF1, MCP1, IL6, TGFβ1) secretion.
• Quantified colony-forming units (CFU-F, CFU-Ad, CFU-Ost) and senescence onset.

Main Results:

• Early-passage BM-MSCs and Ad-MSCs showed comparable proliferation, clonogenicity, and differentiation.
• Significant differences observed in CD146+ cell abundance (higher in BM-MSC) and growth factor secretion.
• BM-MSCs senesced earlier (P3-4) than Ad-MSCs (P6-8).

Conclusions:

• MSC properties vary significantly based on tissue source (BM vs. Ad).
• Ad-MSCs demonstrate a greater in vitro expansion potential and delayed senescence.
• Tissue-specific MSC characteristics must guide clinical application protocol development.