Osteoclasts play a critical role in bone destruction in rheumatoid arthritis. Activation of osteoclastogenesis is mediated by the enhanced expression of RANKL (receptor activator of NF-kappaB ligand), accompanied by reduced expression of its inhibitor, IFN-gamma. Accumulating evidence indicates that the osteoclast-targeted therapy is effective in arthritis models, suggesting a promising new strategy for rheumatoid bone destruction.
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