通过 Sox2-依赖的 Schwann 细胞分类,EphB 信号引导外围神经再生
Simona Parrinello1, Ilaria Napoli, Sara Ribeiro
1MRC Laboratory for Molecular Cell Biology and the UCL Cancer Institute, University College London, Gower Street, London WC1E 6BT, UK.
Cell
|September 28, 2010
概括
纤维细胞和施万细胞通过以弗林-B/EphB2信号协调神经修复. 这引导再生轴突,揭示了一种新的组织再生和干性因子Sox2参与的机制.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 再生医学是一种再生医学.
背景情况:
- 周围神经受伤会触发显著的再生反应.
- 施万细胞分化成前代细胞,以支持轴突的再生.
- 人们越来越认识到非神经细胞 (如纤维细胞) 在神经再生中的作用.
研究的目的:
- 研究纤维细胞及其与 Schwann 细胞的信号传递在周围神经再生中的作用.
- 阐明神经损伤后施万细胞迁移和轴突引导的分子机制.
主要方法:
- 使用了外围神经损伤的体内模型.
- 研究了纤维细胞和施万细胞之间的ephrin-B/EphB2信号通路.
- 研究了干性因子Sox2和N-cadherin在细胞与细胞相互作用中的作用.
主要成果:
- 纤维细胞和 Schwann 细胞之间的 Ephrin-B/EphB2 信号传递调解了细胞分类和定向 Schwann 细胞迁移.
- Sox2和N-cadherin对于EphB2介导的细胞分类和施万细胞组织至关重要.
- 破坏EphB2信号传递导致 Schwann细胞迁移受损,并误导了 vivo 中的轴突再生.
结论:
- 纤维细胞通过与施万细胞进行信号,积极参与神经再生.
- 与Sox2相结合的Ephrin-B/EphB2信号传递提供了一个编排Schwann细胞迁移和指导再生轴突的机制.
- 这项研究揭示了一种新的途径,将环境线索与神经修复过程中的组织形成联系起来.
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