Synovium-derived stromal cell-induced osteoclastogenesis: a potential osteoarthritis trigger

Area of Science:

• Cell Biology
• Immunology
• Rheumatology

Background:

• Mesenchymal stem/stromal cells (MSCs) are implicated in osteoarthritis (OA) pathophysiology.
• Telocytes (TCs) are stromal cells with unclear roles in OA.

Purpose of the Study:

• To investigate the role of synovium-derived stromal cells (SDSCs) in OA.
• To compare SDSCs from healthy and OA subjects.
• To explore the presence and potential role of TCs in OA.

Main Methods:

• In vitro comparison of SDSCs from healthy and OA subjects.
• Analysis of SDSC phenotype, morphology, and differentiation potential.
• Co-culture assays with Peripheral Blood Mononuclear Cells (PBMCs).
• Histological, immunohistochemical, ultrastructural, qRT-PCR, and functional assays.

Main Results:

• Both healthy and OA SDSCs stimulated osteoclast formation from PBMCs.
• OA-derived SDSCs were significantly more effective in promoting osteoclast-like cell formation.
• Telocytes (TCs) were more abundant in OA subject cultures, suggesting their involvement in OA.

Conclusions:

• SDSCs contribute to OA pathogenesis by promoting osteoclastogenesis.
• The increased presence of TCs in OA suggests a potential role in the disease.
• These findings support a multifaceted role for MSCs in OA, impacting treatment strategies.