华西口腔医学杂志

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睫状神经营养因子在面神经再生中的表达变化及TGF-β、rhBMP-2的调控

聂鑫,金岩,GLTipoe   

  1. 710032 第四军医大学口腔医院病理科(聂 鑫,金 岩),香港大学解剖系(GLTipoe)
  • 收稿日期:2003-02-25 修回日期:2003-02-25 出版日期:2003-02-20 发布日期:2003-02-20
  • 基金资助:
    本课题获军队杰出人才基金资助(编号98J010)

Expression of CNTFs in Facial Motoneurons During Facial Nerve Regeneration in Rats and Their Association with TGF-β and rhBMP-2

NIEXin*,JIN Yan,GLTipoe.   

  1. *Department ofOral Pathology,Stomatology College,the Fourth Military Medical University, Xi′an710032,China
  • Received:2003-02-25 Revised:2003-02-25 Online:2003-02-20 Published:2003-02-20

摘要:

目的 探讨睫状神经营养因子(CNTF)在面神经切断后的免疫定位及转化生长因子β(TGF-β)及人重组骨形成蛋白2(rhBMP-2)对其的调控作用。方法 选取面神经切断后不同时期的面神经核组织切片,通过免疫组化染色和图像分析对比不同时期面神经核中CNTF的浓度变化。结果 面神经切断后,术后1 d CNTF就开始表达并逐渐增加,分别于术后1周和1月面神经核运动元中CNTF的含量达到最大。此后逐渐下降。rhBMP-2对CNTF的表达无明显作用,而TGF-β能促进神经再生过程中CNTF的表达。结论 内源性CNTF在神经再生过程中对神经轴突的延伸也具有一定的促进作用。TGF-β可通过促进CNTF的表达而对面神经运动神经元起着重要的保护作用。

关键词: 神经营养因子, 神经, 再生, 转化生长因子

Abstract:

Objective The aim of this studywas to observe the expression of ciliary neurotrophic factors (CNTFs) in the fa- cial motor neurons in rats during facial nerve regeneration.Methods The expression amount of CNTFs in eight groupswas determined with immunohistochemical staining and image analysis.Results The expression of CNTFs increased during the process of nerve re- generation, and reached the maximum one-week and one-month after nerve injury respectively. After one month, the intensity of CNTFs reduced gradually. The expression of recombinant human bone morphogenetic protein-2 (rhBMP-2) did not show distinct dif- ference comparingwith the control, but beta transforming growth factors (TGF-β) benefited the expression of CNTFs during nerve re- generation.Conclusion The endogenous CNTFs promotes the axon outgrow during regeneration, andTGF-βpromotes the expression of CNTFs to rescue motoneuron during facial nerve regeneration.

Key words: neurotrophic factor, nerve, regeneration, transforming growth factor