在体内,远程化学信号由机械信号调节
Eva K Pillai1,2,3, Sudipta Mukherjee4,5,6, Niklas Gampl7,8
1Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK. eva.pillai@embl.de.
Nature materials
|January 19, 2026
概括
组织度通过调节化学信号,影响大脑发育. 这项研究揭示了Piezo1通道如何将机械线索与化学指导联系起来,从而影响细胞路径和大脑发育.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 生物物理学的生物物理.
背景情况:
- 生物过程整合了化学和机械信号.
- 组织力学和远程化学信号之间的相互作用尚未得到充分理解.
研究的目的:
- 研究Xenopus laevis大脑中的组织硬和化学信号之间的交叉声.
- 阐明机械敏感离子通道Piezo1在这种相互作用中的作用.
主要方法:
- 在视网膜质细胞和周围的大脑组织中准Piezo1的打击.
- 在体内评估细胞路径查找错误.
- 对Sema3A (Sema3A) 和Slit1.1的测量表达
- 评估了粘附蛋白NCAM1和N-cadherin的表达.
- 操纵环境硬性ex vivo和体内.
主要成果:
- 皮埃佐1倒置导致路径查找错误,并降低了Sema3A和Slit1的表达.
- 减少Piezo1导致通过减少NCAM1和N-cadherin的组织软化.
- 削弱NCAM1和N-cadherin模仿了Piezo1对硬度和Sema3A的淘汰效应.
- 环境硬度的增加增强了Sema3A和Slit1的表达.
- 在体内,硬化通过Piezo1.1诱导了子宫外Sema3A的产生.
结论:
- 组织力学调节了扩散性,远程化学信号的可用性.
- 这种机械化学交叉声会影响远处的细胞功能.
- Piezo1 作为一个关键的调解者,将机械线索与大脑发育中的化学信号通路联系起来.
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