华西口腔医学杂志

• 基础研究 • 上一篇    下一篇

甲状旁腺相关蛋白对鼠胚髁突软骨细胞增殖和分化的调控

刘来奎1,江宏兵1,殷新民1,李晓箐2,易新竹2   

  1. 1.南京医科大学口腔医学院  口腔解剖生理教研室,江苏  南京 210029;2.四川大学华西口腔医学院  口腔解剖生理教研室,四川  成都 610041
  • 收稿日期:2006-06-25 修回日期:2006-06-25 出版日期:2006-06-20 发布日期:2006-06-20
  • 通讯作者: 李晓箐,Tel: 028-85501483
  • 作者简介:刘来奎(1970-),男,安徽人,讲师,博士
  • 基金资助:

    国家自然科学基金资助项目(30371555)

Regulation of PTHrP in Proliferation and Differentiation of Chondrocytes of Condyle in Fetal Mouse

LIU Lai-kui1, JIANG Hong-bing1, YIN Xin-min1, LI Xiao-qing2, YI Xin-zhu2   

  1. 1. Dept. of Oral Anatomy and Physiology, College of Stomatology, Nanjing Medical Science University, Nanjing 210029, China; 2. Dept. of Oral Anatomy and Physiology, West China College of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2006-06-25 Revised:2006-06-25 Online:2006-06-20 Published:2006-06-20

摘要:

 目的  探讨甲状旁腺相关蛋白(PTHrP)对鼠胚髁突软骨细胞增殖和分化的影响。方法  在体外分离培养鼠胚髁突软骨细胞的基础上,观察PTHrP对其软骨结节形成、碱性磷酸酶(ALP)活性等的影响。结果  研究发现加入浓度分别为0.01 nmol/L、0.1 nmol/L、1 nmol/L、10 nmol/L的PTHrP后,0.01 nmol/L组与对照组相比,形成的软骨结节数量在统计学上无显著性差异(P>0.05),而软骨结节数量从0.1 nmol/L组开始与对照组相比明显增加,统计学上
有显著性差异(P<0.05)。而ALP活性在0.1—10 nmol/L组与对照组相比明显升高,统计学上有显著性差异(P<0.05)。阻断其受体后,实验组和对照组软骨结节形成的数目明显减少(P<0.05),而对其ALP活性的影响在实验组和对照组之间无显著性差异(P>0.05)。结论  PTHrP通过其受体具有促进髁突软骨细胞增殖和分化的作用,其调控机制与其在生长板软骨细胞及下颌膜内成骨中的作用相似。

关键词: 甲状旁腺相关蛋白, 甲状旁腺相关蛋白受体, 髁突, 软骨

Abstract:

Objective To investigate the regulatory mechanism of parathyroid hormone-related protein(PTHrP) in proliferation and differentiation of chondrocytes of condyle in fetal mouse. Methods Chondrocytes of condyle in fetal mouse were separated and cultured in vitro, the influence of PTHrP on proliferation and differentiation was observed. Results After two weeks′ culture in 0.01 nmol/L, 0.1 nmol/L, 1 nmol/L, 10 nmol/L human PTHrP, there was significant difference in the number of cartilage nodule formed between experiment group and control group (P<0.05), and there was no significant difference in 0.01 nmol/L group(P>0.05). Alkaline phosphatase(ALP) activity was significantly intensified in experiment group and control group(P<0.05). Meanwhile, it was found that this function of promotion was lessened after anti-PTHR antibody used. Conclusion It can be seen that PTHrP, via its receptor, can promote proliferation and differentiation of chondrocytes of condyle, which resemble its modulation mechanism in epiphyseal growth plate cartilage intramembrane in mandibule.

Key words: parathyroid hormone-related protein, parathyroid hormone receptor, condyle, cartilage