title: [The effect of rhAm and EMPs on promoting differentiation of hBMSCs into osteoblasts].
abstract: OBJECTIVE
  To compare the effect of recombinant full-length human amelogenin (rhAm) and enamel matrix proteins (EMPs) on differentiation of human bone marrow stromal cells (hBMSCs) into osteoblasts. Meanwhile, to investigate the possible mechanism of rhAm promoting osteogenic differentiation of hBMSCs.
  
  
  METHODS
  The hBMSCs were cultured in vitro. The cells were treated with 10 μg/mL rhAm and 200 μg/mL EMPs. The gene and protein expression of Runx2, ALP, Col-I were observed by using RT-PCR and Western blot at different time points. The influence of rhAm and EMPs on mineralization and osteogenesis of hBMSCs were observed by using alkaline phosphatase and alizarin red staining methods. The data was analyzed with SPSS 13.0 software package.
  
  
  RESULTS
  Both rhAm and EMPs significantly promoted gene and protein expression of Runx2, ALP and Col-I in hBMSCs. Meanwhile, rhAm and EMPs also facilitated osteogenesis and mineralization of hBMSCs. The effects of two proteins on hBMSCs had no significant difference.
  
  
  CONCLUSIONS
  Both 10 μg/mL rhAm and 200 μg/mL EMPs can significantly promote differentiation of hBMSCs into osteoblasts. The rhAm may be used in inducing periodontal tissue regeneration in the future.
authors.affiliation: Department of Periodontology,Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine. Shanghai 200011;China.E-mail:zhklin@sina.cn.
authors.forename: Zhi-kai
authors.initials: ZK
authors.lastname: Lin
authors.forename: Rong
authors.initials: R
authors.lastname: Shu
authors.forename: Zhong-chen
authors.initials: ZC
authors.lastname: Song
authors.forename: Lan
authors.initials: L
authors.lastname: Cheng
authors.forename: Jia-chen
authors.initials: JC
authors.lastname: Dong
mesh_terms: D000469:Alkaline Phosphatase; D053523:Amelogenin / Q000378:metabolism*; D002454:Cell Differentiation; D003746:Dental Enamel Proteins / Q000378:metabolism*; D006801:Humans; D059630:Mesenchymal Stem Cells; D010006:Osteoblasts / Q000502:physiology*; D010012:Osteogenesis; D011994:Recombinant Proteins / Q000378:metabolism
chemical_list: D053523:Amelogenin; D003746:Dental Enamel Proteins; D011994:Recombinant Proteins; C109069:enamel matrix proteins; D000469:Alkaline Phosphatase