成纤维细胞生长因子对牙周膜细胞群及克隆钙化的作用

The role of basic fibroblast growth factor on expression of mineralization of periodontal ligament cell population and clones

目的观察碱基成纤维细胞生长因子（ｂａｓｉｃｆｉｂｒｏｂｌａｓｔｇｒｏｗｔｈｆａｃｔｏｒ，ｂＦＧＦ）对牙周膜（ｐｅｒｉｏｄｏｎｔａｌｌｉｇａｍｅｎｔ，ＰＤＬ）细胞克隆体外钙化的作用。方法对３颗前磨牙的牙周膜细胞进行细胞克隆化，观察ｂＦＧＦ对ＰＤＬ细胞克隆钙化能力的影响，测定细胞牙骨质附着蛋白（ｃｅｍｅｎｔｕｍｄｅｒｉｖｅｄａｔａｃｈｍｅｎｔｐｒｏｔｅｉｎ，ＣＡＰ）的结合力及碱性磷酸酶（ａｌｋａｌｉｎｅｐｈｏｓｐｈａｔａｓｅ，ＡＬＰ）的表达。结果ｂＦＧＦ使ＰＤＬ细胞克隆钙化率增加了１１％。ｂＦＧＦ依赖性钙化克隆与非ｂＦＧＦ依赖性钙化克隆相比具有较低的ＡＬＰ表达率和较高的ＣＡＰ结合力。结论ｂＦＧＦ可在体外促进ＰＤＬ细胞克隆钙化的形成，ｂＦＧＦ依赖与非依赖性钙化克隆是不同的细胞种群。

Objective To determine the effect of basic fibroblast growth factor (bFGF) on mineraliztion of PDL cell clone. Methods The PDL tissue that derived from three human donors was cultured and cells were cloned. The mineralizing ability were detected with or without bFGF treatment in the presence of dexamethasone. Cloned progenitor populations were assayed for their constitutive capacity to bind CAP and express ALP.Results The results show that bFGF increases clone mineralization (11%), but not in PDL cell population. The cell clones that mineralized only in the presence of bFGF have higher CAP binding ability and lower ALP expression compared with other mineralized clone cells. Conclusion bFGF enhances mineralizing expression of PDL clone. The clones that mineralized only with bFGF treatment are different cell types from the bFGF undependent mineralized clones.