羟基磷灰石/二氧化锆复合材料颗粒对骨髓间充质干细胞增殖及成骨分化的影响

Objective To evaluate the effect of the HA/ZrO2 composite particle on proliferation and osteogenesis of rabbit mesenchymal stem cells (MSCs) by using molecular biology methods.Methods The HA/ZrO2 composite particles were sintered at high temperature using the powder of HA and ZrO2 with different proportions.MSCs were isolated from rabbits and cultured.The effect of the composite particles on promoting cell proliferation of rabbit MSCs was detected using MTT method.Alkaline phosphatase activities were measured with ALP method.RT-PCR method was applied to measure the expression of collagen Ⅰ , osteocalcin and osteopontin mRNA.Results Pure HA pauicles and composite particles which contain HA promoted MSCs proliferation.Vonkossa staining showed that both pure HA particks and composite particles decreased the degree of positive stain of MSCs.ALP test showed that cell activity in the culture medium that contained pure HA particles or composite particles was significantly higher than that in the conventional culture medium and that contained pure ZrO2 particles (P ＜ 0.05＝.RT-PCR results showed that composite particles promoted the expression of collagen Ⅰ and osteocalcin gene.Conclusion The HA/ZrO2 composite particles promote proliferation and osteogenesis of MSCs.

The effect of the HA/ZrO2 composite particle on proliferation and osteogenesis of MSCs