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相关概念视频

Cell-matrix's Response to Mechanical Forces01:13

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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
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Types of Membrane Protrusions01:28

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The protrusion of the cell surface is an initial step for several cellular processes, including cell migration, phagocytosis, and neurite outgrowth. These membrane protrusions are a result of cytoskeletal rearrangement. The most  widely observed cell protrusions include lamellipodia, pseudopodia, filopodia, microvilli, invadopodia, and podosomes. These protrusions can be of two types — static or dynamic.
The microvilli, an example of stable protrusions, are finger-like projections...
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相关实验视频

Updated: Jun 9, 2025

High-resolution Imaging of Nuclear Dynamics in Live Cells under Uniaxial Tensile Strain
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活细胞单层的破裂强度是:

Julia Duque1, Alessandra Bonfanti2, Jonathan Fouchard3,4

  • 1London Centre for Nanotechnology, University College London, London, UK. j.duque@ucl.ac.uk.

Nature materials
|October 29, 2024
PubMed
概括

表皮单层通过质蛋白网络抵抗大变形,从而增加了性. 破坏这个网络会削弱组织,突出质素.

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相关实验视频

Last Updated: Jun 9, 2025

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科学领域:

  • 细胞生物学 细胞生物学
  • 生物物理学的生物物理.
  • 组织力学是组织力学.

背景情况:

  • 表皮组织必须承受机械应力才能发挥作用.
  • 组织破裂对于发育至关重要 (例如,布拉斯托科尔形成),但人们对其了解甚少.
  • 破裂是一种涉及分子,细胞和机械相互作用的多层次现象.

研究的目的:

  • 描述表皮单层破裂的特征.
  • 了解机械力与生物过程在多个尺度上的相互作用.

主要方法:

  • 机械测量 机械测量 机械测量
  • 现场成像 现场成像 现场成像
  • 计算建模计算建模

主要成果:

  • 表皮单层在破裂之前可以经历很大的变形 (长度增加几倍).
  • 在较大的变形时,表皮表现出应力强化,通过细胞上角质纤维丝网络增加硬度.
  • 素网络的破坏损害了单层完整性,并防止了应变硬.

结论:

  • 细胞上质网对于表皮单层机械强度至关重要.
  • 组织风湿学和变形史影响破裂开始时的应变和压力.
  • 了解破裂机制对于发育生物学和组织工程至关重要.