Antioxidation of decellularized stem cell matrix promotes human synovium-derived stem cell-based chondrogenesis

Area of Science:

• Biomaterials Science
• Stem Cell Biology
• Regenerative Medicine

Background:

• Clinical cartilage defect treatment is hindered by joint inflammation.
• Human adult synovium-derived stem cells (SDSCs) possess therapeutic potential but require optimization for harsh joint environments.

Purpose of the Study:

• To enhance the antioxidant ability and chondrogenic potential of human adult SDSCs.
• To evaluate the efficacy of ex vivo expansion on a decellularized stem cell matrix (DSCM) for improving SDSC quality.

Main Methods:

• SDSCs were expanded ex vivo on DSCM and compared to plastic-flask expansion.
• Oxidative stress was induced using hydrogen peroxide (H2O2).
• Microarray analysis, flow cytometry, histology, biochemical assays, and gene expression analysis (RT-PCR) were used to assess cell status, proliferation, differentiation, and signaling pathways.

Main Results:

• DSCM expansion upregulated antioxidative genes and chondrogenic potential in SDSCs.
• DSCM-expanded SDSCs showed increased resistance to H2O2-induced oxidative stress, reduced apoptosis, and maintained proliferation.
• DSCM expansion promoted chondrogenic differentiation and involved ERK1/2 and p38 signaling pathways while downregulating p21.

Conclusions:

• Decellularized stem cell matrix (DSCM) serves as a promising system for expanding high-quality human adult SDSCs.
• Enhanced SDSCs exhibit improved antioxidant and chondrogenic properties, crucial for cartilage regeneration in inflammatory joint conditions.