【摘要】 本文利用壳寡糖(COS)的生物活性以及胶原(Col)的良好生物学性能,构建了不同聚合度的胶原/壳寡糖(Col/COSn)复合凝胶,以前成骨细胞MC3T3-E1s为例,从细胞的增殖以及相关成骨基因表达水平角度评价该复合凝胶对细胞的增殖以及分化效果的影响。结果表明,相对于纯Col凝胶,所有的Col/COSn复合凝胶对前成骨细胞MC3T3-E1s的增殖、分化及成骨相关基因的表达都有不同程度的促进效果,不同聚合度的COS复合凝胶间促进效果有明显差别,含有壳四糖(COS4)与壳六糖(COS6)的复合凝胶促进细胞增殖的效果优于其他组别,而含有壳五糖(COS5)的复合凝胶在促进细胞分化及成骨相关基因的表达上则明显优于其他寡糖。更多还原

【Abstract】 Chit-oligosaccharide(COS)is a low-molecular,water-soluble mass with higher biological activity,which can be absorbed by human body easily and interact with cells directly.Based on the excellent biological properties of collagen(Col)and COS,a series of Col and COS composite hydrogel(Col/COSn)was constructed in this study.The effect of composite hydrogel on cells proliferation,differentiation and related osteogenic gene expression was evaluated on pre-osteoblast MC3T3-E1 s.The experimental results showed that all the Col/COS composite gels could promote the growth of MC3T3-E1 s,proliferation and bone related gene expression compared to that of pure Col gels.And there was significant difference among the composite hydrogel groups with different degrees of polymerization of COS.The effect of the composite gel which contained chitotetraose(COS4)or chitohexaose(COS6)on the cells proliferation was better than that of other groups,while on cells differentiation and related osteogenic gene expression the composite gel contained chitopentaose(COS5)was the best in all the groups.更多还原