title: Proliferation and osteoblastic differentiation of human bone marrow stromal cells on hydroxyapatite/bacterial cellulose nanocomposite scaffolds.
abstract: In this study, we prepared hydroxyapatite/bacterial cellulose (HAp/BC) nanocomposite scaffolds utilizing the biomimetic technique, and investigated the proliferation and osteoblastic differentiation of stromal cells derived from human bone marrow (hBMSC) on them. Scanning electron microscopy proved that cells could adhere and spread on scaffolds. The hBMSC seeded on the nanocomposites exhibited better adhesion and activity than those seeded upon the pure BC. After 6 days of culture on scaffolds, the cells proliferated faster on the nanocomposites than on the pure BC, as assessed by Alamar Blue assay. Real-time reverse transcription PCR results showed that the alkaline phosphatase (ALP) activity of hBMSC and the expression of osteopontin, osteocalcin, bone sialoprotein, and ALP mRNA were all higher for up to 7 days for hBMSC cultured on the nanocomposites than for those cultured upon the pure BC with and without the presence of osteogenic supplements (L-ascorbic acid, glycerophosphate, and dexamethasone, p<0.05). These results suggest that the attachment, proliferation, and differentiation in cultured hBMSC can be modulated by the HAp/BC nanocomposite scaffold properties. In summary, we have developed a scaffold that displays in vitro biocompatibility, which may have potential use for bone tissue engineering.
authors.affiliation: Laboratory of Orthopaedic Cellular and Molecular Biology, Institute of Health Sciences, Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences, Shanghai, P.R. China.
authors.forename: Bo
authors.initials: B
authors.lastname: Fang
authors.forename: Yi-Zao
authors.initials: YZ
authors.lastname: Wan
authors.forename: Ting-Tang
authors.initials: TT
authors.lastname: Tang
authors.forename: Chuan
authors.initials: C
authors.lastname: Gao
authors.forename: Ke-Rong
authors.initials: KR
authors.lastname: Dai
mesh_terms: D000469:Alkaline Phosphatase / Q000235:genetics / Q000378:metabolism; D001419:Bacteria / Q000737:chemistry; D001483:Base Sequence; D001854:Bone Marrow Cells / Q000166:cytology* / Q000378:metabolism; D002448:Cell Adhesion; D002454:Cell Differentiation; D049109:Cell Proliferation; D002482:Cellulose / Q000648:ultrastructure; D017931:DNA Primers / Q000235:genetics; D017886:Durapatite; D006801:Humans; D058574:Integrin-Binding Sialoprotein; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000648:ultrastructure; D010006:Osteoblasts / Q000166:cytology* / Q000378:metabolism; D015675:Osteocalcin / Q000235:genetics; D010012:Osteogenesis; D053495:Osteopontin / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D012795:Sialoglycoproteins / Q000235:genetics; D017154:Stromal Cells / Q000166:cytology* / Q000378:metabolism; D023822:Tissue Engineering / Q000379:methods; D054457:Tissue Scaffolds
chemical_list: D017931:DNA Primers; C546871:IBSP protein, human; D058574:Integrin-Binding Sialoprotein; D012333:RNA, Messenger; D012795:Sialoglycoproteins; D015675:Osteocalcin; D053495:Osteopontin; D002482:Cellulose; D017886:Durapatite; D000469:Alkaline Phosphatase