Nobuyuki Udagawa, Shigeru Kotake, Naoyuki Kamatani, Naoyuki Takahashi, Tatsuo Suda
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引用次数: 129
Abstract
Bone-resorbing osteoclasts are formed from hemopoietic cells of the monocyte-macrophage lineage under the control of bone-forming osteoblasts. We have cloned an osteoblast-derived factor essential for osteoclastogenesis, the receptor activator of NF-kappaB ligand (RANKL). Synovial fibroblasts and activated T lymphocytes from patients with rheumatoid arthritis also express RANKL, which appears to trigger bone destruction in rheumatoid arthritis as well. Recent studies have shown that T lymphocytes produce cytokines other than RANKL such as IL-17, granulocyte-macrophage colony-stimulating factor and IFN-gamma, which have powerful regulatory effects on osteoclastogenesis. The possible roles of RANKL and other cytokines produced by T lymphocytes in bone destruction are described.
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