2β-(3羟丙氧)-骨化三醇对OS-732人成骨样细胞增殖与分化的影响

Effect of 2β-(3-hydroxypropoxy)-calcitriol on proliferation and differentiation of osteoblast-like cells

目的观察2β(3羟丙氧)骨化三醇(ED71)对体外培养人成骨样细胞增殖与分化的影响,进一步探讨ED71治疗骨质疏松的机制。方法采用塞唑蓝(MTT)分析法检测ED71对体外培养OS732人成骨样细胞增殖作用与效价。采用培养细胞匀浆测单位蛋白碱性磷酸酶活性,培养基中骨钙素含量分析及原位杂交方法检测ED71对OS732人成骨样细胞分化的影响。结果培养第4天,10-7mol/LED71显著抑制成骨样细胞增殖(P<0.05),而10-8mol/L、10-9mol/LED71对成骨样细胞的作用不明显。培养4d后培养基中骨钙素水平在10-7mol/LED71组变化不大,在10-8mol/L、10-9mol/LED71组骨钙素水平显著增高(P<0.05或P<0.01)。原位杂交转化生长因子β(TGFβ1)表达明显增加,而碱性磷酸酶比活性无明显变化。结论ED71抑制成骨样细胞增殖高剂量作用显著,促进成骨样细胞分化较低剂量显著。

Objective To study the effect of 2β-(3-hydroxypropoxy)-Calcitriol (ED-71) on the cell growth and differentiation of human osteoblast-like cell line OS-732. Methods Osteoblast-like cells were cultured with various concentration of ED-71.The effects of ED-71 on proliferation and differentiation were detected by (MTT), alkaline phosphatase activity and level of osteocalcin (bone gla protein,BGP). Results The proliferation rate of osteoblast-like cells cultured for 4 days was significantly inhibited by 10~ -7mol/L concentration of ED-71. ED-71 in 10~ -8, 10~ -9mol/L concentration can significantly increase BGP level, but ED-71 in 10~ -7mol/L concentration may decrease BGP level.Alkaline phosphatase activity compared with control was not changed significantly. Conclusions ED-71 can inhibit cell growth in high concentration and improve cell differentiation in lower concentration.