Studies on an immunologically induced synovitis model in pigs and sheep

Area of Science:

• Veterinary Medicine
• Immunology
• Surgical Research

Background:

• Chronic synovitis is a target for arthroscopic synovectomy.
• Developing reliable animal models for synovitis is crucial for surgical innovation.

Purpose of the Study:

• To evaluate the potential of laser treatment in arthroscopic synovectomy by inducing chronic synovitis in sheep and pigs.
• To characterize the induced synovitis for its suitability as a research model.

Main Methods:

• Chronic synovitis was induced using chicken egg or turkey egg albumin sensitization and intra-articular injections in sheep and pigs.
• Animals underwent systemic immunization and joint antigen challenges.
• Inflammatory responses and synovial changes were monitored over a 4-month period.

Main Results:

• Turkey egg albumin induced persistent, characterized synovitis in pigs, featuring villi formation and specific synovial fluid changes.
• Chicken egg albumin failed to induce significant synovitis in sheep.
• Pigs showed unsatisfactory inflammatory signs with chicken egg albumin, while sheep developed only mild synovitis.

Conclusions:

• Turkey egg albumin is a suitable antigen for inducing a robust chronic synovitis model in pigs.
• The pig model provides a valuable platform for investigating arthroscopic synovectomy techniques.
• Species-specific immune responses influence the development of induced synovitis models.