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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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Cytoskeletal Coordination in Cell Migration01:32

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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Cell Polarization by Rho Proteins01:21

Cell Polarization by Rho Proteins

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Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
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Cell Motility through Blebbing01:16

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Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
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Determining the Plane of Cell Division02:13

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Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function. 
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Actin Polymerization and Cell Motility01:13

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Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate....
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相关实验视频

Updated: Jun 30, 2025

Concentric Gel System to Study the Biophysical Role of Matrix Microenvironment on 3D Cell Migration
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集体细胞辐射有序迁移在空间限制中的空间限制.

Hao Dong1, Fen Hu1, Xuehe Ma1

  • 1The Key Laboratory of Weak-Light Nonlinear Photonics of Education Ministry, School of Physics and TEDA Institute of Applied Physics, Nankai University, Tianjin, 300071, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|March 23, 2024
PubMed
概括
此摘要是机器生成的。

在空间限制下,NIH3T3纤维细胞表现出辐射有序迁移,由上下调节和细胞-ECM相互作用驱动. 这种对发育至关重要的集体行为,尽管存在单个细胞扩散,但仍显示波传播.

关键词:
2D空间限制的二维空间限制活性物质系统的活性物质系统.这是一个自下而上的自上.集体细胞迁移 集体细胞迁移这是自上而下的.

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相关实验视频

Last Updated: Jun 30, 2025

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Concentric Gel System to Study the Biophysical Role of Matrix Microenvironment on 3D Cell Migration

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科学领域:

  • 细胞生物学 细胞生物学
  • 活动物质物理学 活动物质物理学
  • 生物物理学的生物物理.

背景情况:

  • 集体细胞迁移对于生物过程如发育和伤口愈合至关重要.
  • 活性物质系统,包括细胞,表现出复杂的新兴行为.
  • 了解被囚禁的细胞迁移动态是组织工程和发育生物学的关键.

研究的目的:

  • 发现和描述NIH3T3纤维细胞的集体辐射有序迁移.
  • 阐明调控机制,包括自上而下的控制和细胞-ECM相互作用,控制这种迁移.
  • 开发和验证一种解释观察到的集体细胞行为的机械模型.

主要方法:

  • 在2D封闭环境中对NIH3T3纤维细胞迁移的实验观测.
  • 开发一个包含细胞-ECM相互作用和空间限制的机械模型.
  • 数字模拟用于复制和分析集体迁移模式.
  • 关于几何特征独立性的模型预测的实验验证.

主要成果:

  • NIH3T3纤维细胞表现出集体的辐射有序迁移到中心的封闭模式.
  • 单个细胞的运动是扩散的,但集体行为显示传播的辐射波面.
  • 一个机械模型成功地复制了观察到的辐射顺序和波面传播.
  • 模型预测证实,几何特征不会影响订单行为.

结论:

  • 集体辐射有序迁移源于自上向下调节 (空间限制) 和自下向上的细胞特性 (细胞-ECM相互作用) 之间的相互作用.
  • 这项研究提供了一种机理性的理解,即受限细胞群是如何实现协调运动的.
  • 这项工作提供了对生物系统中活性物质和集体细胞行为的基本原理的见解.