Synoviocyte neotissues towards in vitro meniscal tissue engineering

Area of Science:

• Veterinary Medicine
• Biomaterials Science
• Regenerative Medicine

Background:

• Meniscal injuries are a frequent cause of stifle joint pain and osteoarthritis in dogs.
• Current treatments often fail to fully restore joint function, highlighting the need for advanced therapeutic strategies.

Purpose of the Study:

• To investigate the production of synoviocyte-derived autologous neotissues for meniscal tissue engineering in dogs.
• To compare two culture techniques: contracted versus tensioned synthesis of synoviocyte neotissues.

Main Methods:

• Synoviocytes were isolated from 14 client-owned dogs with naturally occurring stifle osteoarthritis during routine arthroscopy.
• Neotissues were cultured using either contracted or tensioned synthesis methods.
• Analyses included meniscal-like matrix components, gene expression (fibrochondrogenesis, inflammation), cell viability, and protein content.

Main Results:

• Tension significantly improved cell viability and enhanced fibrochondrogenic activity.
• Tension upregulated collagen type 1 and aggrecan gene expression while downregulating IL-6.
• Tension increased collagen protein content and the chondrogenic index of the neotissues.

Conclusions:

• Applying tension to synoviocytes is a viable method for in vitro meniscal tissue engineering.
• Tensioned synthesis promotes a more favorable cellular environment for neotissue development, potentially aiding in osteoarthritis management.