In the present study, novel biomemetic composite scaffolds using the sol-gel derived bioactive glass (BG), collagen (COL), and phosphoserine (PS) were prepared by freeze-drying. MC3T3-E1 were cultivated in vitro, collected and seeded onto the surface of BG, BG-COL and BG-COL-PS. Cell attachment and proliferation were observed. The cell proliferation was tracked by MTT method 1,3,5 d after seeding. MTT showed that the cells can adhere to and proliferate well on the surface of the scaffolds, and the cell proliferation result of scaffold BG-COL-PS was better than those of scaffolds BG and BG-COL. Therefore, the scaffold BG-COL-PS can be a potential scaffold for tissue engineer.
Animals ; Biocompatible Materials ; chemistry ; Biomimetic Materials ; chemical synthesis ; Cell Line ; Cell Proliferation ; Ceramics ; chemistry ; Collagen ; chemistry ; Mice ; Osteoblasts ; cytology ; Phosphoserine ; chemistry ; Tissue Engineering ; methods ; Tissue Scaffolds

Objective To investigate the effects of 20％ fluor-hydroxyapatite(FHA) on proliferation and osteogenic differentiation of human MG63 osteosarcoma cells.Methods FHA was prepared by chemical precipitation method,and its structure and surface features were tested by scanning microscope,Xray diffraction(XRD) and Fourier transform infrared spectroscopy.MG63 cells were cultured and divided into FHA,hydroxyapatite(HA) and control groups(n=3).The proliferation of the cells was evaluated using methylthiazol tetrazolium(MTT) assay.ALP activity of the cells was assessed.Osteogenic differentiation was evaluated based on the reverse transcription PCR(RT-PCR) of differentiation-related genes,namely,collagen type Ⅰ(Col Ⅰ),alkaline phosphatase(ALP),osteocalcin(OCN) and core binding factor α1(Cbfα1).The data were analyzed statistically by one-way analysis of variance using SPSS 13.0 software.Results XRD test showed that the main crystalline phase of FHA was similar to that of HA.Absorptance value of cells exposed to FHA(1.87±0.06) measured by MTT was higher than that of the control(1.25±0.02) on the third day(P＜ 0.05),and there was no statistically significant difference between the cells exposed to FHA and HA(1.84± 0.03)(P＞0.05).ALP activity of the cells exposed to FHA (4.62±0.09) was higher than that of the control (1.92 ± 0.05)(P＜0.05).RT-PCR tests showed that compared with the control,FHA up-regulated the expression of Col Ⅰ,ALP and OCN mRNA,down-regulated the expression of Cbfα1 mRNA.Conclusions FHA enhances the proliferation and osteogenic differentiation-related gene expression,and has good biocompatibility.