title: Effect of dexamethasone on growth inhibition and chondrogenic maturation of human chondrosarcoma.
abstract: The effect of dexamethasone, a synthetic glucocorticoid, on in vitro and in vivo growth and differentiation of the human chondrosarcoma cell line (OUMS-27) was studied. Cells were treated with various doses of dexamethasone, and increasing doses produced an inhibitory effect on OUMS-27 tumor cell proliferation and induced maturation. Cell counts for OUMS-27 on day 9 ranged from 59% of the control at 10(-8) M to 45% of the control at 10(-5) M dexamethasone. Northern blot analysis revealed that the type II collagen mRNA level in cells given dexamethasone was lower than that in the controls, and the type X collagen mRNA level was higher than that in the controls. Phase-contrast microscopy revealed that cells grown in control medium formed monolayers consisting of small, polygonal cells, whereas dexamethasone-treated cells became larger and more irregular in shape. In the in vivo study the growth rate of masses in nude mice induced by inoculating OUMS-27 cells was also reduced in a dose-dependent manner with dexamethasone administration. These results suggest that dexamethasone caused growth inhibition and induced chondrogenic maturation of human chondrosarcoma cells.
authors.affiliation: Division of Orthopedic Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1 Asahimachi-dori, Niigata 951-8510, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kawashima
authors.forename: Akira
authors.initials: A
authors.lastname: Ogose
authors.forename: Tadashi
authors.initials: T
authors.lastname: Hayami
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yamagiwa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Hatano
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Hotta
authors.forename: Naoto
authors.initials: N
authors.lastname: Endo
mesh_terms: D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology*; D015152:Blotting, Northern; D001859:Bone Neoplasms / Q000503:physiopathology*; D002454:Cell Differentiation / Q000187:drug effects*; D002813:Chondrosarcoma / Q000503:physiopathology*; D003907:Dexamethasone / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D014407:Tumor Cells, Cultured
chemical_list: D000893:Anti-Inflammatory Agents; D003907:Dexamethasone