The elucidation of the molecular mechanism in bone and cartilage destruction by IL-17supposing temporomandibular joint disorder

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We examined the effects of IL-17on bone and cartilage destruction supposing temporomandibular joint disorder. The osteoclast differentiation and function of mature osteoclasts were suppressed in the direct stimulation by IL-17A to osteoclast precursors, whereas they were induced in the indirect stimulation via osteoblasts. IL-17A promoted the production of extracellular matrix proteins in osteoblasts. In addition, our results suggested that IL-17F suppresses the direction of synthesis in cartilage matrix protein metabolism, whereas it promotes the direction of destruction in the metabolism by chondrocytes.