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相关概念视频

Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...

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相关实验视频

Updated: May 13, 2026

Fiber-optic Implantation for Chronic Optogenetic Stimulation of Brain Tissue
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在视神经受伤后增强神经再生和功能恢复的无线光遗传刺激的MXene-chitosan光响应管道

Enoch Obeng1, Zhenyuan Xie1, Zhixing Li1

  • 1State Key Laboratory of Eye Health, Optometry and Vision Science, Wenzhou Medical University, Wenzhou 325027, Zhejiang, China; Zhejiang Key Laboratory of Key Technologies for Visual Pathway Reconstruction, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.

Acta biomaterialia
|August 30, 2025
PubMed
概括

一个新的W1.33C i-MXene-chitosan导管促进了视神经的再生. 这种生物功能平台使用光热刺激来保护视网膜质细胞并通过离子通道改善视觉功能.

关键词:
生物活性管道基托桑的使用神经分化光电刺激() 基因

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科学领域:

  • 生物材料科学
  • 神经科学
  • 组织工程

背景情况:

  • 视神经损伤导致视网膜质细胞 (RGC) 逐渐退化和轴突损失由于抑制因素.
  • 光热和光电刺激显示神经修复的希望, 但面临过度暴露等挑战.
  • 开发安全有效的神经刺激和再生方法对于治疗视神经损伤至关重要.

研究的目的:

  • 使用 W1.33C i-MXene 和素设计和制造一个生物功能,多孔,生物降解的导体.
  • 在视神经受伤后, 调查该管道的神经分化和功能恢复的潜力.
  • 探索涉及离子通道和神经信号通路的潜在机制.

主要方法:

  • 将 W1.33C i-MXene 纳入基托溶液中,与 Genipin 交联形成一个多孔管道.
  • 在光电平台上评估PC12细胞的神经分化,评估对 (Ca2+) 离子通道的影响.
  • 使用视神经压碎 (ONC) 鼠标模型来评估受伤后光刺激下的导管的有效性.

主要成果:

  • 通过调节Ca2+离子通道,WMC导管表现出光电性质并促进神经分化.
  • 在ONC模型中,WMC管道的光刺激保护了RGC并改善了视觉功能.
  • 该管道调节神经相关蛋白质和下游信号级联,特别是通过l型电压通道 (L-VGCC),促进神经再生.

结论:

  • 开发的WMC导体是一个多功能平台,结合了MXene的光导性和奇托桑的生物相容性.
  • 这个平台提供了一个可扩展的无线神经刺激和组织工程介导的中枢神经系统损伤后的功能恢复策略.
  • 这项研究突显了光热刺激的治疗潜力,