High binding capacity of cyclophilin B to chondrocyte heparan sulfate proteoglycans and its release from the cell surface by matrix metalloproteinases: Possible role as a proinflammatory mediator in arthritis

Abstract

Cyclophilin B is a secreted CSA-binding protein involved in inflammatory events. It can induce chemotaxis in human neutrophils and T lymphocytes. The finding that cyclophilin B is an intrinsic component of cartilage and that it can be released by MMPs suggests that it has a role in the pathogenesis of arthritic diseases, even more so since its signaling receptor is present within the inflamed joint both on T cells and in the rheumatoid synovium.