Sheep as a model for evaluating mesenchymal stem/stromal cell (MSC)-based chondral defect repair.

Area of Science:

• Orthopedics
• Regenerative Medicine
• Biomedical Engineering

Background:

• Osteoarthritis (OA) involves articular cartilage degradation, causing pain and immobility.
• Current cartilage repair methods yield suboptimal fibrocartilage with transient results.
• Large animal models are crucial for late-stage preclinical evaluation of OA repair strategies.

Purpose of the Study:

• To review the biological properties of ovine mesenchymal stem/stromal cells (oMSC).
• To assess the utility of oMSC in sheep models for articular cartilage repair research.
• To highlight the potential of oMSC in advancing tissue engineering for OA.

Main Methods:

• Review of existing literature on ovine MSC biology.
• Analysis of studies utilizing sheep as a large animal model for cartilage repair.
• Examination of MSC-based strategies for hyaline cartilage regeneration.

Main Results:

• Sheep are a suitable large animal model due to physiological similarities and cost-effectiveness.
• Ovine MSC offer advantages over autologous chondrocytes, including expansion capacity.
• Challenges remain in maintaining oMSC chondrogenic stability for hyaline cartilage formation.

Conclusions:

• Ovine MSC represent a promising cell source for cartilage repair research in sheep models.
• Further research into oMSC biology is needed to optimize chondrogenic differentiation.
• Sheep models with oMSC hold significant potential for developing effective OA tissue engineering therapies.