【摘要】 目的:探讨坐骨神经损伤与再生过程中,背根节神经元轴突再生的分子调控模式和机理。方法:采用表达谱芯片分析坐骨神经离断后,L4-6背根节神经元基因表达的变化,并分析差异基因所反映的核心生物学过程的变化。结果:(1)坐骨神经离断后,近端坐骨神经差异基因的数量表现为先上升再下降的趋势,但背根节神经元呈现为波浪形的增加。(2)核心生物学过程的差异基因数量变化:刺激检测、G-蛋白偶联受体信号通路、细胞表面受体连接信号转导均呈波浪形变化。防御反应、炎症反应、免疫反应、轴突生成表现为持续性增加。(3)与轴突生成相关的差异基因表达变化结果显示:Lhx4、Nkx2-9、Efnb3、Titf1、Apoa4表现为波浪形增加。Mapk8ip3、Zfp312、Gap43在长时间点表达增加。Tnn、Efnb1一开始降低,Notch1、Nefl、Bmpr1b等基因表现为长时间点表达降低。结论:坐骨神经离断后,背根节神经元差异基因和核心生物学过程的变化趋势,反映了周围神经损伤与再生过程中轴突再生的分子调控模式。更多还原

【Abstract】 Objective:To investigate the molecular regulation pattern of axon regeneration in dorsal root ganglion(DRG) during sciatic nerve injury and regeneration. Methods: By using rat microarrays, the change of gene expression and key biological processes in L4-6 DRG were analyzed. Results: The number of differential genes was increased fluctuatedly, and the number of differential genes involved in key biological processes showed volatile increase or sustained increase. Conclusion: Following sciatic nerve transection, the change trend of differential genes and key biological processes in DRG revealed the molecular regulation pattern during axon regeneration.更多还原