华西口腔医学杂志

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Neurokinin-1受体介导P物质对破骨细胞骨吸收功能的影响

孙应明1;罗颂椒1;赵昱辉2   

  1. 1.四川大学华西口腔医院  正畸科,四川  成都 610041;2.第四军医大学口腔医院  正畸科,陕西  西安 710032
  • 收稿日期:2006-02-25 修回日期:2006-02-25 出版日期:2006-02-20 发布日期:2006-02-20
  • 通讯作者: 孙应明,Tel:13812046459
  • 作者简介:孙应明(1971-),男,安徽人,主治医师,博士
  • 基金资助:

    国家自然科学基金资助项目(30200320)

Substance P Regulates Function of Osteoclasts via Neurokinin-1 Receptor

SUN Ying-ming1,  LUO Song-jiao1, ZHAO Yu-hui2   

  1. 1. Dept. of Orthodontics, West China College of Stomatology,Sichuan University, Chengdu 610041, China; 2. Dept. of Orthodontics, Stomatological College, The Fourth Military Medical University, Xi'an 710032, China
  • Received:2006-02-25 Revised:2006-02-25 Online:2006-02-20 Published:2006-02-20

摘要:

目的  了解P物质对体外培养大鼠破骨细胞骨吸收功能的影响和作用机制,探讨P物质在正畸牙槽骨改建中的调控机制。方法  通过机械分离新生大鼠四肢长骨方法体外培养破骨细胞,细胞免疫组织化学染色观察NK1受体在大鼠破骨细胞内的表达情况;加入含不同浓度P物质(10-7—10-4 mol/L)和10-5 mol/L P物质受体拮抗剂(NK1受体拮抗剂)的培养液,观察P物质和NK1受体拮抗剂对破骨细胞骨吸收功能的影响。结果  免疫组化染色发现,大
鼠破骨细胞内NK1受体呈强阳性表达,着色位于细胞浆,胞核呈阴性;P物质明显增加破骨细胞的骨吸收陷窝面积(P<0.05),但未见骨吸收陷窝数目明显增加(P>0.05)。NK1受体拮抗剂抑制了P物质对破骨细胞骨吸收功能的刺激
效应。结论  NK1受体可能介导P物质增强破骨细胞骨吸收功能,从而在正畸牙槽骨改建中发挥局部调节作用。

关键词: P物质, Neurokinin-1受体, Neurokinin-1受体拮抗剂, 破骨细胞

Abstract:

Objective  To investigate the effects of substance P on cultured rat osteoclasts. Methods  Neurokinin-1(NK1)receptor expression in osteoclasts was examined by immunohitochemical method, and changes of bone resorption activity caused by substance P and NK1 receptor antagonists were detected by pit formation assay. Results  Immunoreactivity for NK1 receptor was distributed in the cytoplasm of osteoclasts. The average of pit formation areas significantly increased with addition of  substance P (10-7-10-4 mol/L) (P<0.05), but the number of pitformations did not change(P>0.05). NK1 receptor antagonists inhibited the enhancement of the bone resorption by substance P addition. Conclusion  The findings suggested  that substance P may stimulate osteoclasts and result in bone resorption by the mediation of NK1 receptor.

Key words: substanceP, Neurokinin-1receptor, Neurokinin-1receptorantagonist, osteoclasts