title: TNF-α increases αvβ3 integrin expression and migration in human chondrosarcoma cells.
abstract: Chondrosarcoma is a type of highly malignant tumour with a potent capacity to invade locally and cause distant metastasis. Chondrosarcoma shows a predilection for metastasis to the lungs. Tumour necrosis factor (TNF)-α is a key cytokine involved in inflammation, immunity, cellular homeostasis and tumour progression. Integrins are the major adhesive molecules in mammalian cells and have been associated with metastasis of cancer cells. However, the effects of TNF-α in migration and integrin expression in chondrosarcoma cells are largely unknown. In this study, we found that TNF-α increased the migration and the expression of αvβ3 integrin in human chondrosarcoma cells. Activations of MAPK kinase (MEK), extracellular signal-regulating kinase (ERK) and nuclear factor-κB (NF-κB) pathways after TNF-α treatment were demonstrated, and TNF-α-induced expression of integrin and migration activity was inhibited by the specific inhibitor and mutant of MEK, ERK and NF-κB cascades. Taken together, our results indicated that TNF-α enhances the migration of chondrosarcoma cells by increasing αvβ3 integrin expression through the MEK/ERK/NF-κB signal transduction pathway.
authors.affiliation: Department of Orthopedic Surgery, National Taiwan University Hospital, and Institute of Biomedical Engineering, College of Medicine, National Taiwan University, Taipei, Taiwan.
authors.forename: Chun-Han
authors.initials: CH
authors.lastname: Hou
authors.forename: Rong-Sen
authors.initials: RS
authors.lastname: Yang
authors.forename: Sheng-Mou
authors.initials: SM
authors.lastname: Hou
authors.forename: Chih-Hsin
authors.initials: CH
authors.lastname: Tang
mesh_terms: D045744:Cell Line, Tumor; D002465:Cell Movement / Q000187:drug effects*; D002813:Chondrosarcoma / Q000201:enzymology / Q000235:genetics / Q000473:pathology*; D048049:Extracellular Signal-Regulated MAP Kinases / Q000378:metabolism; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D006801:Humans; D039302:Integrin alphaVbeta3 / Q000235:genetics / Q000378:metabolism*; D020935:MAP Kinase Signaling System / Q000187:drug effects; D020929:Mitogen-Activated Protein Kinase Kinases / Q000378:metabolism; D016328:NF-kappa B / Q000378:metabolism; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*; D015854:Up-Regulation / Q000187:drug effects
chemical_list: D039302:Integrin alphaVbeta3; D016328:NF-kappa B; D014409:Tumor Necrosis Factor-alpha; D048049:Extracellular Signal-Regulated MAP Kinases; D020929:Mitogen-Activated Protein Kinase Kinases