Mesenchymal stem cells (MSCs) are a potential source of cells for the repair of articular cartilage and osteochondral defects (OCD) in the ankle. Synovial tissue has been shown to be a rich source of MSCs with the ability to undergo chondrogenic differentiation. Although these cells represent a heterogenous population, clonal populations have not been previously studied. MSCs were isolated from synovial tissue of a patient undergoing joint arthroplasty and expanded in culture. Six clonal populations were also isolated and expanded. The cells from the mixed parent population and the derived clonal populations were characterised for stem cell surface epitopes, and then cultured in chondrogenic mediums. Various assays were determined to analyse for features of differentiation.Introduction
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