Passage-dependent relationship between mesenchymal stem cell mobilization and chondrogenic potential

Area of Science:

• Cell biology
• Biomedical engineering
• Tissue engineering

Background:

• Galvanotaxis, cell migration due to electrical fields, is vital in development and wound healing.
• Mesenchymal stem cells (MSCs) from synovium (SDSCs) show promise for regenerative medicine.
• Understanding how cell culture passage affects SDSC differentiation is crucial for therapeutic applications.

Purpose of the Study:

• To investigate the impact of cell culture passage on synovium-derived stem cells (SDSCs).
• To assess changes in SDSC galvanotaxis and chondrogenic potential with increasing passage number.
• To determine optimal culture conditions for SDSC differentiation into cartilage-producing cells.

Main Methods:

• SDSCs were cultured over four passages, monitoring cell surface marker expression (CD31, CD34, CD49c, CD73).
• Migratory responses to direct current (DC) electric fields were evaluated at each passage.
• Micropellet cultures assessed cartilage-like extracellular matrix production.

Main Results:

• Expression of CD31, CD34, and CD49c remained stable; CD73 expression transiently increased then decreased.
• Early passage SDSCs showed anodal migration; later passages (P3 onwards) exhibited cathodic migration, similar to chondrocytes.
• Only late passage (P4) SDSCs formed significant cartilage-like tissue in micropellets.

Conclusions:

• Four-passage culture primes SDSCs, inducing chondrocyte-like galvanotaxis.
• This priming protocol also enhances the chondrogenic differentiation capacity of SDSCs.
• Cultured SDSCs can be selectively differentiated into cartilage-producing cells via defined passage protocols.