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相关概念视频

Cell Migration01:19

Cell Migration

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Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
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Chemotaxis and Direction of Cell Migration01:21

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Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
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Cytoskeletal Coordination in Cell Migration

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A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...
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Electric Field-controlled Directed Migration of Neural Progenitor Cells in 2D and 3D Environments
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在由基于神经网络的反控制器调节的电场下控制细胞迁移模式.

Giovanny Marquez1, Mohammad Jafari2, Manasa Kesapragada1

  • 1Department of Applied Mathematics, Baskin School of Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA.

Bioengineering (Basel, Switzerland)
|July 29, 2025
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概括

这项研究引入了一种新的神经网络控制器,以精确调节使用电场 (EF) 的细胞迁移. 增强的控制器确保了准确的轨迹跟踪,并且在指导细胞运动以修复组织方面优于标准方法.

关键词:
反控制反的控制方法加尔瓦诺塔克西斯 (Galvanotaxis) 是一个电车.预测生物学 预测生物学伤口愈合 伤口愈合

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科学领域:

  • 生物物理学的生物物理.
  • 细胞生物学 细胞生物学
  • 控制系统工程 控制系统工程

背景情况:

  • 电场 (EF) 用于组织再生和伤口愈合.
  • 细胞对EF的反应,特别是细胞迁移,是复杂的,并未完全理解.
  • 精确控制细胞迁移对于发育,免疫反应和修复至关重要.

研究的目的:

  • 开发一个闭环控制系统,精确调节人口层次的细胞迁移.
  • 适应神经网络 (NN) 反控制器以引导安全约束下的细胞迁移.
  • 为了应对非线性动态和EF大小限制在细胞迁移控制中所带来的挑战.

主要方法:

  • 对先前开发的NN反控制器进行重构,用于单细胞膜电位调节.
  • 调整NN控制器以适应人口层面的细胞迁移指导.
  • 将投影运算符嵌入NN权重更新法中,以防止和诱导的不适应性学习.
  • 数字模拟用于验证控制器在和条件下的性能.
  • 在2D培养中使用单向EF来指导巨细胞电的体外概念验证实施.
  • 新型控制器与标准的比例积分导数 (PID) 控制器的比较.

主要成果:

  • 经过修改的NN控制器显示了精确的轨迹跟踪,即使控制信号在EF极限和时也是如此.
  • 经过调整的NN控制器在模拟中表现优于原来的NN设计.
  • 在体外实验中,通过使用开发的控制器,成功指导了原始巨细胞迁移.
  • 性能比较表明在特定场景中比标准PID控制器有优势.

结论:

  • 开发的基于NN的反控制器提供了人口层次细胞迁移的精确,闭环调节.
  • 嵌入式投影操作员有效地减轻了EF和引起的问题.
  • 这种方法提供了一种可靠的方法来控制电动细胞迁移,在再生医学和组织工程中具有潜在的应用.