title: Osteogenesis of bone marrow mesenchymal stem cells on strontium-substituted nano-hydroxyapatite coated roughened titanium surfaces.
abstract: OBJECTIVE
  To investigate osteogenesis of bone marrow mesenchymal stem cells (BMSCs) on strontium-substituted nano-hydroxyapatite (Sr-HA) coated roughened titanium surfaces.
  
  
  METHODS
  Sr-HA coating and HA coating were fabricated on roughened titanium surfaces by electrochemical deposition technique and characterized by field emission scanning electron microscope (FESM). BMSCs were cultured on Sr-HA coating, HA coating and roughened titanium surfaces respectively. Cell proliferation, alkaline phosphatase (ALP) activity, mineralized nodules formation and cell osteocalcin (OC) secretion were measured.
  
  
  RESULTS
  Electrochemically deposited Sr-HA coating and HA coating had no effect on the proliferation of BMSCs and demonstrated that the materials have a good biocompatibility. BMSCs cultured on Sr-HA coating showed increased alkaline phosphatase activity, mineralized nodules formation, and cell OC secretion compared with the other two groups. Cells cultured on HA coating also showed increased biological activity compared with the roughened group.
  
  
  CONCLUSIONS
  Sr-HA coated titanium surfaces by electrochemical deposition can promote osteogenesis of BMSCs in vitro and have the potential to shorten bone healing period and enhance implant osseointegration.
authors.affiliation: Department of Stomatology, Tenth People's Hospital, Tongji University School of Medicine Shanghai 200072, China.
authors.forename: Hua-Wei
authors.initials: HW
authors.lastname: Yang
authors.affiliation: Department of Stomatology, Tenth People's Hospital, Tongji University School of Medicine Shanghai 200072, China.
authors.forename: Mao-Han
authors.initials: MH
authors.lastname: Lin
authors.affiliation: Department of Stomatology, Tenth People's Hospital, Tongji University School of Medicine Shanghai 200072, China.
authors.forename: Yuan-Zhi
authors.initials: YZ
authors.lastname: Xu
authors.affiliation: Department of Stomatology, Tenth People's Hospital, Tongji University School of Medicine Shanghai 200072, China.
authors.forename: Guang-Wei
authors.initials: GW
authors.lastname: Shang
authors.affiliation: Department of Stomatology, Tenth People's Hospital, Tongji University School of Medicine Shanghai 200072, China.
authors.forename: Rao-Rao
authors.initials: RR
authors.lastname: Wang
authors.affiliation: Department of Stomatology, Tenth People's Hospital, Tongji University School of Medicine Shanghai 200072, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Chen
keywords: Titanium; bone marrow mesenchymal stem cells; hydroxyapatite; osteogenesis; strontium