Evaluation of equine synovial-derived extracellular matrix scaffolds seeded with equine synovial-derived mesenchymal stem cells.

The study focuses on creating a bioactive synovial scaffold through the infusion of decellularized synovial-derived extracellular matrix with synovial-derived mesenchymal stem cells. This method is being proposed as a potential treatment method for damaged cartilage.

Experiment Procedure

• The research team conducted their experiments using synovial samples from the femoropatellar and medial femorotibial joints of equine cadavers.
• Synovial-derived mesenchymal stem cells were cultivated. Some of these cells were treated to enhance the expression of green fluorescent protein (GFP) and human bone morphogenetic protein (BMP)-2.
• The synovial-derived extracellular matrix was decellularized and then infused with the cultivated stem cells using a serum gradient.
• The samples were analyzed on the initial day, then after 3, 7, and 14 days. The researchers evaluated cell migration, differentiation, and distribution into the matrix, employing a number of methods including fluorescence microscopy and the examination of certain cell markers.

Findings and Results

• By the 14th day, the mesenchymal stem cells had successfully multiplied by 2.5 times within the matrix.
• The matrix seeded with stem cells showed a significant decrease in CD90 expression, which is a typical marker for stem cells, and showed an increased expression of hyaluronan (HA) and proteoglycan (PG), both of which are crucial components of the extracellular matrix in cartilage tissues.
• The matrix that was infused with stem cells treated to enhance expression of GFP or BMP-2 had a significant ris in BMP-2 expression.

Conclusions and Clinical Relevance

• The results suggest that the seeding of the synovial-derived extracellular matrix with synovial-derived mesenchymal stem cells can successfully create a bioactive synovial scaffold.
• The increased expression of BMP-2 coincides with an increase in HA and PG, indicating the production of substances required for tissue regeneration and the manifestation of synoviocytes (cells found in the synovial membrane of joints) in the scaffold.
• Given that BMP-2 protein can aid in the repair of damaged cartilage, these findings point toward potential new avenues of treatment for cartilage injuries.