马氏珠母贝糖胺聚糖对体外成骨细胞增殖、分化及矿化功能的影响

Effects of glycosaminoglycan extracted from Pinctada martensii on osteoblast proliferation , differentiation and mineralization in vitro

目的观察珠母贝糖胺聚糖在体外对新生大鼠颅骨成骨细胞增殖、分化及矿化功能的影响。方法应用MTT法、PNPP法、茜素红染色 (ARS)矿化骨结节及用图像分析仪计算骨结节的面积等方法观察细胞的增殖、碱性磷酸酶 (ALP)活性及矿化结节形成的影响。结果珠母贝糖胺聚糖 0 .0 0 8～ 0 .5 g·L- 1在不同时间MTT测得的A值均低于空白对照组 ,不促进细胞的增殖 ;各浓度组在培养 5d时 ,碱性磷酸酶的活性显著高于空白对照组 ;培养 31d后茜素红染色显示 ,0 .0 6 3g·L- 1组所形成的骨结节面积显著大于空白对照组。结论珠母贝糖胺聚糖对体外培养的SD新生大鼠颅骨成骨细胞有显著促进分化和矿化的作用 ,但不促进细胞的增殖。

Objective To study the effects of glycosaminoglycan extracted from Pinctada martensii on the proliferation, differentiation and mineralization of newborn rat calvarium osteoblast in vitro. Methods MTT, PNPP and ARS methods were used to measure the cell proliferation, activity of ALP and the function of mineral nodes formation of osteoblasts cultured in vitro. Results Glycosaminoglycan at concentration of 0.008～0.5g·L -1 inhibited mildly the proliferation of osteoblast cells, however, this range of concentrations of glycosaminoglycan markedly increased the ALP activity and stimulated mineral node bone formation in osteoblast. Conclusion Glycosaminoglycan extracted from the Pinctada martensii showed stimulating effects on the differentiation and mineralization of newborn rat calvarium osteoblast in vitro, but the stimulating effect on cells proliferation was not observed.