通过通过E-Cadherin参与调节改变球体中的细胞结合张力
1Department of Chemistry, The University of British Columbia, Kelowna, British Columbia V1 V 1 V7, Canada.
ACS applied bio materials
|May 10, 2024
概括
研究人员开发了新型张力测量绳 (TGTs),以精确控制3D球形模型中的细胞-细胞粘附和机械力,推进上皮质完整性研究.
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
- 生物材料是一种生物材料.
背景情况:
- 在附着结点 (AJs) 处由卡德林介导的张力对细胞粘附和上皮质完整性至关重要.
- 现有的3D多细胞模型缺乏精确的方法来操纵AJ和量化连接张力.
研究的目的:
- 在3D球形模型中引入一种用于精确操纵和量化连接张力的新系统.
- 研究E-cadherin介导的粘附在维护球体内的细胞力学中的作用.
主要方法:
- 开发用于3D球形的E-cadherin修饰的张力计绳索 (TGT).
- 利用DNA触发器调节节点张力.使用DNA触发器调节节点张力.
- 使用破裂诱导的光来测量机械力.
- 应用托管介导的链位移来破坏细胞-细胞粘附.
主要成果:
- 通过破裂诱导的光,成功地测量了3D球体内的机械力.
- 证明机械强大的TGT可以维持正常的E-cadherin介导的粘附.
- 展示了破坏E-cadherin特异性细胞-细胞粘附的能力,改变细胞内张力.
结论:
- 开发的TGT系统提供了一个强大而精确的方法来操纵球形模型中的细胞-细胞粘附和细胞内力学.
- 这一进步有助于更深入地了解表皮完整性和细胞相互作用的机械调节.
相关概念视频
Cell-matrix's Response to Mechanical Forces
2.6K
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.
Anchoring junctions mechanically attach a cell to the...
Anchoring junctions mechanically attach a cell to the...
2.6K
Tension Response at Adherens Junctions
2.6K
The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin...
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin...
2.6K
Cadherins in Tissue Organization
3.0K
The cadherins are a superfamily of cell adhesion molecules comprising over 180 variants, with specific tissues expressing a particular combination of cadherin types. Cadherins generally exhibit homophilic binding; i.e., cadherins on one cell bind to cadherins of the same or closely related type on another cell. Thus, cells of the same type have a specific affinity to bind to each other and sort themselves into clusters to form tissues.
Cell Sorting During Development
Cell sorting plays an...
Cell Sorting During Development
Cell sorting plays an...
3.0K
Anchoring Junctions
3.8K
Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...
3.8K
Adherens Junctions
4.8K
Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types – adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
Adherens Junctions are Dynamic
4.8K
Cytoskeletal Coordination in Cell Migration
4.7K
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...
4.7K


