title: A serum substitute promotes osteoblast-like phenotypic expression in cultured cells from chick calvariae.
abstract: The effects of medium supplements were tested on embryonic chick calvarial cells in culture. Isolates were divided among four treatment groups: Nu-Serum, chicken serum, fetal bovine serum, or calf serum. Expression of the osteoblastic phenotype was assessed by cell morphology, DNA content, [3H]thymidine incorporation, lactate production, cellular and medium alkaline phosphatase activities, and collagen synthesis. Cells grown in Nu-Serum demonstrated increased alkaline phosphatase activity and a six-fold higher rate of collagen synthesis compared to chicken serum. These cells displayed a polygonal profile, abundant rough endoplasmic reticulum, Golgi apparati, and elaborated an extensive matrix of banded collagen which was well mineralized by day 10 of culture. Although highly mitogenic, chicken serum promoted a more fibroblastoid morphology. Compared to the sera tested, Nu-Serum preferentially promoted the osteoblast-like phenotype in chick calvarial cells in culture.
authors.affiliation: Department of Oral Health, University of Louisville, Kentucky.
authors.forename: W K
authors.initials: WK
authors.lastname: Ramp
authors.forename: R M
authors.initials: RM
authors.lastname: Dillaman
authors.forename: L G
authors.initials: LG
authors.lastname: Lenz
authors.forename: D M
authors.initials: DM
authors.lastname: Gay
authors.forename: R D
authors.initials: RD
authors.lastname: Roer
authors.forename: T A
authors.initials: TA
authors.lastname: Ballard
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D000704:Analysis of Variance; D000818:Animals; D001769:Blood; D001802:Blood Substitutes / Q000494:pharmacology*; D002455:Cell Division / Q000187:drug effects / Q000502:physiology; D002478:Cells, Cultured; D002642:Chick Embryo; D003094:Collagen / Q000096:biosynthesis; D003470:Culture Media; D004247:DNA / Q000096:biosynthesis*; D004721:Endoplasmic Reticulum / Q000648:ultrastructure; D008854:Microscopy, Electron; D015388:Organelles / Q000648:ultrastructure; D010006:Osteoblasts / Q000166:cytology* / Q000187:drug effects / Q000648:ultrastructure; D010641:Phenotype; D012710:Serum Albumin, Bovine / Q000494:pharmacology; D013936:Thymidine / Q000378:metabolism
chemical_list: D001802:Blood Substitutes; D003470:Culture Media; D012710:Serum Albumin, Bovine; D003094:Collagen; D004247:DNA; D000469:Alkaline Phosphatase; D013936:Thymidine