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Osteoblast‐Derived TGF‐β1 Stimulates IL‐8 Release Through AP‐1 and NF‐κB in Human Cancer Cells

Introduction: The bone marrow microenvironment is further enriched by growth factors released during osteoclastic bone resorption. It has been reported that the chemokine interleukin (IL)‐8 is a potent and direct activator of osteoclastic differentiation and bone resorption. However, the effect of bone‐derived growth factors on the IL‐8 production in human cancer cells and the promotion of osteoclastogenesis are largely unknown. The aim of this study was to investigate whether osteoblast‐derived TGF‐β1 is associated with osteolytic bone diseases.