摘要
通过体外矿化实验,对比研究了熔融法生物玻璃45S5和溶胶-凝胶法生物玻璃58S、77S的生物矿化性能的差异;并运用了这三种生物玻璃的DMEM((Dulbecco's Modified Eagle Medium)浸提液对MC-3T3细胞进行培养,以考察不同生物玻璃在培养液中的离子溶出对成骨细胞增殖及ALP(碱性磷酸酶)活性的影响．通过体外矿化实验可以发现,77S的生物矿化性能相对45S5和58S较差,在SBF溶液(模拟体液)中浸泡96h只能形成HA(羟基磷灰石)晶体,45S5和58S则能生成类骨HCA(碳酸羟基磷灰石)晶体;但细胞培养实验发现,77S浸提液中培养的细胞,其细胞增殖和ALP活性都明显高于45S、58S和对照组．由此认为,一定的离子浓度范围内, Si离子的存在有利于成骨细胞的增殖与分裂．
The bio-mineralization properties of the melt-derived bioglass 45S5 and the sol-gel derived bioglass 58S and 77S in vitro were investigated. The effect of ionic products from bioactive glass dissolution on osteoblast proliferation and ALP activity was also discussed. The results show that osteoblasts cultured with 77S conditioned DMEM show better cellular viability and ALP activity when compared to 45S5 and 58S, though the bio-mineralization of 77S shows a little worse-only HA can form from 77S when HCA can form from 45S5 and 58S. By comparing the Si concentrations in bioglass conditioned DMEM and control DMEM, it can be concluded that solutions containing high Si concentrations in certain range are mitogenic for bone cells.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第1期123-127,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(50472054
50272021
50572029)
广东省自然科学基金团队项目(020898
04205786)
