Novel Biomaterial-Based Synovial Fluid Analysis Reveals Protective microRNA Signatures in a Mouse Model of Acute Synovitis-Driven Osteoarthritis

Acute synovitis and continuous mechanical stress are critical factors of Post-traumatic Osteoarthritis (PTOA); however, the effect on cartilage degeneration and its underlying mechanisms remains unclear. Here, we established a novel biomaterial-based method for synovial fluid analysis in mice to uncover the mechanisms underlying the onset of PTOA, focusing on synovitis and mechanical stress. Twelve-week-old C57BL/6J males were divided to the ACL-Transection (ACL-T), ACL-rupture (ACL-R), and Intact groups. We performed joint instability test and histological analysis for cartilage degeneration and synovitis at 2, 6, and 10 weeks. Real time PCR was performed on articular cartilage at 2 weeks a