甲状旁腺激素对人牙乳头间充质细胞骨钙素分泌的影响

The role of parathyroid hormone on the osteocalcin secretion of cultured human dental papilla mesechymal cells

目的 :探讨甲状旁腺激素 ( parathyroidhormone ,PTH)对人牙乳头间充质细胞矿化能力的影响。 方法 :细胞在对照组 (含 φ =15 %FCS、10mmol/Lβ 磷酸甘油和 5 0 μg/ml抗坏血酸的DMEM培养液 )和实验组 (含33.3nmol/LPTH的对照组培养液 )连续培养 35d ,每 3～ 4d换液一次。放射免疫检测骨钙素含量。结果 :人牙乳头间充质细胞的对照组和PTH组骨钙素的水平均较低 ,2 1d后 2组骨钙素水平升高 ,实验组高于对照组P <0 .0 5。结论 :PTH可促进人牙乳头间充质细胞的分化和矿化 。

Objective: To study the effects of parathyroid hormone(PTH) on the calcification characters of cultured human dental papilla mesenchymal(DPM) cells.Methods: DPM cells were cultured up to 35 days in two groups. The control group was cultured in DMEM supplemented with 15% FCS,50 μg/ml ascorbic acid and 10 mmol/L β-glycerophosphate. The cells in experimental group were cultured in above mentionned medium containing 33.3 nmol/L of PTH. The medium was changed every 3 or 4 days. Osteocalcin secretion of the cells was measured by radioimmunoassay.Results: Addition of TPH in medium caused a significant increase of osteocalcin secretion from 21 to 35 days culture (P<0.05) after set up.Conclusion: PTH may increase the calcification secretion of cultured human DPM cells.