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在长期植入微电极周围的大脑壁画细胞的结构和功能的动态变化.

Steven M Wellman1, Adam M Forrest1, Madeline M Douglas2

  • 1Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA; Center for Neural Basis of Cognition, Pittsburgh, PA, USA.

Biomaterials
|November 15, 2024
PubMed
概括

神经电极植入导致大脑炎症和细胞周细胞反应,包括变化和新的血管形成. 皮层内微刺激可以调节细胞周围,为更好的神经器件生物相容性提供见解.

关键词:
生物相容性 生物相容性血液-大脑屏障是什么?大脑与计算机的接口.皮层内微刺激的内皮层微刺激.神经调节是一种神经调节.神经刺激是一种神经刺激.神经血管疾病的发生.

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科学领域:

  • 神经科学是一个神经科学.
  • 生物材料科学 生物材料科学
  • 细胞生物学 细胞生物学

背景情况:

  • 神经界面对于神经科学研究和治疗神经系统疾病至关重要.
  • 皮层内装置的植入会引发大脑组织的严重炎症和代谢需求.
  • 血脑屏障维护的关键是细胞,它们与神经退行有关,它们在神经植入后的作用是未知的.

研究的目的:

  • 为了研究在脑中植入微电极阵列后的细胞周细胞行为和动态.
  • 描述电极与组织接口的细胞和血管反应.
  • 通过皮质内微刺激来探索细胞内的调节.

主要方法:

  • 利用双光子显微镜观察四周植入期内皮细胞的动态变化.
  • 监测皮质细胞结构,功能和信号,以应对电极插入.
  • 评估了皮层内微刺激对周细胞水平的影响.

主要成果:

  • 在插入电极时观察到细胞内和毛细血管收缩的短暂增加.
  • 记录了皮细胞的流入和增殖,有助于新血管的形成.
  • 确定了封装微电极阵列的反应性免疫细胞,并通过微刺激证明了围细胞的幅度和频率依赖的调制.

结论:

  • 神经电极植入会在接口上诱导复杂的细胞周细胞和免疫细胞反应.
  • 细胞动态对微刺激很敏感,这表明治疗调节的潜力.
  • 这些发现为电极与组织相互作用提供了新的见解,指导了更具生物相容性的神经技术的开发.