title: Cellular biocompatibility and stimulatory effects of calcium metaphosphate on osteoblastic differentiation of human bone marrow-derived stromal cells.
abstract: In the present study, the in vitro biocompatibility of calcium metaphosphate (CMP) with human bone marrow stromal cells (HBMSCs) and its effect on osteoblastic differentiation have been investigated. Powder and disk forms of CMP do not exert a cytotoxic effect on the HBMSCs undergoing osteoblastic differentiation. In addition, the HBMSCs adhere to the surface of the CMP disk as successfully as to the culture plate or hydroxyapatite (HA) disk. The HBMSCs adhered to either the HA or CMP disk display an undistinguishable actin arrangement and cellular phenotypes, indicating that the CMP does not disrupt normal cellular responses. An analysis of the differentiation of the HBMSCs cultured on culture plate, the HA and the CMP disk shows that three matrices are capable of supporting osteoblastic differentiation of the HBMSCs as accessed by alkaline phosphatase (ALP) staining. Further molecular analysis of osteoblastic differentiation of HBMSCs reveals that the CMP disk has a better ability than the HA disk to induce an expression of osteoblast-related genes, including ALP, osteoprotegerin (OPG), a decoy receptor for RANK ligand, and osteopontin (OPN), a non-collagenous bone matrix protein. The results demonstrate that, in addition to favorable biocompatibility, the CMP can stimulate osteoblastic differentiation of the HBMSCs in vitro.
authors.affiliation: Skeletal Diseases Research Center, Kyungpook National University Hospital, Daegu 700-412, South Korea.
authors.forename: Eui Kyun
authors.initials: EK
authors.lastname: Park
authors.forename: Young Eun
authors.initials: YE
authors.lastname: Lee
authors.forename: Je-Yong
authors.initials: JY
authors.lastname: Choi
authors.forename: Sun-Ho
authors.initials: SH
authors.lastname: Oh
authors.forename: Hong-In
authors.initials: HI
authors.lastname: Shin
authors.forename: Kyo-Han
authors.initials: KH
authors.lastname: Kim
authors.forename: Shin-Yoon
authors.initials: SY
authors.lastname: Kim
authors.forename: Sukyoung
authors.initials: S
authors.lastname: Kim
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D001854:Bone Marrow Cells / Q000166:cytology* / Q000502:physiology*; D002130:Calcium Phosphates / Q000737:chemistry*; D002448:Cell Adhesion / Q000502:physiology; D002454:Cell Differentiation / Q000502:physiology; D002455:Cell Division; D048429:Cell Size / Q000502:physiology; D002470:Cell Survival; D002478:Cells, Cultured; D006801:Humans; D008422:Materials Testing; D016348:Osseointegration / Q000502:physiology; D010006:Osteoblasts / Q000166:cytology* / Q000502:physiology*; D010012:Osteogenesis / Q000502:physiology; D017154:Stromal Cells / Q000166:cytology / Q000502:physiology; D013499:Surface Properties
chemical_list: D001672:Biocompatible Materials; D002130:Calcium Phosphates