title: Production of hydrogen peroxide by serum and its involvement in cell proliferation in ROS 17/2.8 osteoblasts.
abstract: The effects of hydrogen peroxide, which fetal bovine serum (FBS) releases, on proliferation have been studied in ROS 17/2.8 osteoblasts. Cell proliferation, when activated by FBS, was inhibited by catalase in ROS 17/2.8 osteoblasts, but did not in primary osteoblast-like cells. Serum-induced extracellular signal-regulated kinase(ERK) activity was reduced by the pretreated catalase in ROS 17/2.8 osteoblasts. In addition, the present studies demonstrate that addition of FBS led to an increase of fluorescence of dihydrorhodamine 123, indicating formation of free radicals including hydrogen peroxide in ROS 17/2.8 osteoblasts, but not in primary osteoblast-like cells. These phenomena may account for the generation of reactive oxygen species during cellular proliferation in ROS 17/2.8 osteoblasts.
authors.affiliation: Department of Dental Pharmacology, School of Dentistry, Wonkwang University, Iksan, Chonbuk, South Korea.
authors.forename: H J
authors.initials: HJ
authors.lastname: Chae
authors.forename: J S
authors.initials: JS
authors.lastname: Kang
authors.forename: J I
authors.initials: JI
authors.lastname: Han
authors.forename: B G
authors.initials: BG
authors.lastname: Bang
authors.forename: S W
authors.initials: SW
authors.lastname: Chae
authors.forename: K W
authors.initials: KW
authors.lastname: Kim
authors.forename: H M
authors.initials: HM
authors.lastname: Kim
authors.forename: H R
authors.initials: HR
authors.lastname: Kim
mesh_terms: D000818:Animals; D002374:Catalase / Q000494:pharmacology; D002417:Cattle; D002455:Cell Division / Q000187:drug effects / Q000502:physiology; D002460:Cell Line; D002478:Cells, Cultured; D003470:Culture Media; D004247:DNA / Q000096:biosynthesis; D005609:Free Radicals / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000378:metabolism*; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism; D010006:Osteoblasts / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism*; D051381:Rats; D017382:Reactive Oxygen Species / Q000378:metabolism
chemical_list: D003470:Culture Media; D005609:Free Radicals; D017382:Reactive Oxygen Species; D004247:DNA; D006861:Hydrogen Peroxide; D002374:Catalase; D020928:Mitogen-Activated Protein Kinases