bFGF和壳聚糖对人牙周膜成纤维细胞的作用

目的:探讨水溶性壳聚糖和碱性成纤维细胞生长因子(bFGF)二者联合应用,对人牙周膜成纤维细胞(HPDLFs)的生长增殖和成骨性能的影响。方法:原代培养HPDLFs,观察bFGF和壳聚糖联合作用于HPDLFs后,细胞的增殖情况(MTT比色测定法)、碱性磷酸酶(ALP)活性及骨钙素(OC,放免法检测)的变化情况,并进行统计学分析。结果:bFGF(10ng/ml)和低剂量壳聚糖(0.2mg/ml)组促进细胞增殖,不降低碱性磷酸酶活性,且提高骨钙素合成量。相对bFGF单独作用组,bFGF和壳聚糖联合作用组可上调ALP活性,bFGF(10ng/ml)和高剂量壳聚糖(2mg/ml)组抑制细胞增殖,不降低碱性磷酸酶活性,且有较高的骨钙素合成量。结论:bFGF和低剂量壳聚糖联合作用既可促进细胞增殖,又可促进HPDLFs向成骨细胞转化。bFGF和壳聚糖联合应用可能是一种新型的牙周组织再生的诱导材料。

The effect of basic fibroblast growth factor and chitosan on human periodontal ligament fibroblasts

Objective:To assess the effect of basic fibroblast growth factor(bFGF) and chitosan(a water soluble derivation) on human periodontal ligament fibroblasts(HPDLFs). Methods:In vitro cultured HPDLFs of passage 5-7 were in culture medium only(group 1), or exposed to 10 ng/ml of bFGF(group 2), 10 ng/ml of bFGF combined with 0.2 mg/ml chitosan(group 3),10 ng/ml of bFGF combined with 2 mg/ml chitosan(group 4),0.2 mg/ml of chitosan(group 5) or 2 mg/ml of chitosan(group 6) for 5 days respectively. Cell proliferation was examined by MTT assay,alkaline phosphatase activity and osteocalcin synthesis were measured by AMP method and radioimmunoassay respectively.Results:Higher proliferation of HPDLFs was observed in group 2 and 3,higher alkaline phosphatase activity in group 5 and 6, and higher osteocalcin synthesis in group 3 and 4.Conclusions:bFGF combined with chitosan(0.2 mg/ml) may increase the proliferation of HPDLFs, stimulate HPDLFs to differentiate into osteoblasts.