title: 1 alpha,25-dihydroxyvitamin D3 stimulates colony formation of chick embryo chondrocytes in soft agar.
abstract: The effect of vitamin D metabolites on the growth of chick embryo chondrocytes in soft agar was examined. 1,25-Dihydroxyvitamin D3 [1,25(OH)2D3] at 10(-8)-10(-7) M induced colony formation by chick embryo chondrocytes in soft agar in the presence of 10% fetal bovine serum. Furthermore, 1,25(OH)2D3 increased the number of colonies in the presence of a maximal dose of basic fibroblast growth factor, a potent mitogen for chondrocytes in soft agar. However, 24R,25 (OH)2D3 and other metabolites had little effect on the soft agar growth of chondrocytes in the presence or absence of basic fibroblast growth factor. These results suggest that 1,25(OH)2D3 is an active metabolite which may be involved in supporting cartilage growth.
authors.affiliation: Applied Research Laboratories of Chugai Pharmaceutical Company, Ltd. Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Sato
authors.forename: M
authors.initials: M
authors.lastname: Iwamoto
authors.forename: K
authors.initials: K
authors.lastname: Nakashima
authors.forename: F
authors.initials: F
authors.lastname: Suzuki
authors.forename: Y
authors.initials: Y
authors.lastname: Kato
mesh_terms: D000362:Agar; D000818:Animals; D002117:Calcitriol / Q000494:pharmacology*; D002356:Cartilage / Q000166:cytology* / Q000187:drug effects; D002449:Cell Aggregation / Q000187:drug effects; D002478:Cells, Cultured; D002642:Chick Embryo; D002762:Cholecalciferol / Q000494:pharmacology
chemical_list: D002762:Cholecalciferol; D000362:Agar; D002117:Calcitriol