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相关概念视频

Tight Junctions01:29

Tight Junctions

6.8K
Tight junctions are molecular seals between cells that prevent the leaking of fluids, ions, and other small solutes across cavities and compartments in multicellular organisms. They are mainly composed of claudin and occludin transmembrane proteins, and other proteins such as tricellulin and JAM (junctional adhesion molecule). All these proteins are 4-pass transmembrane proteins, except JAM, which is a single-pass transmembrane protein belonging to the immunoglobulin superfamily. The...
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Overview of Cell-Cell Junctions01:14

Overview of Cell-Cell Junctions

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The complex three-dimensional arrangement of cells in any multicellular organism is defined and maintained by interactions of cells with each other and the extracellular matrix. Cell-cell junctions are specialized structures where the multi-protein complexes on one cell interact with the multi-protein complexes on another  cell. These cell junctions are classified  into three main types based on their function — occluding, anchoring, and gap junctions.
Occluding or Tight...
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Overview of Cell-Cell Junctions01:14

Overview of Cell-Cell Junctions

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Anchoring Junctions01:03

Anchoring Junctions

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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:...
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Adherens Junctions01:24

Adherens Junctions

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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
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Classification of Epithelial Tissues: Simple Epithelium01:30

Classification of Epithelial Tissues: Simple Epithelium

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Simple epithelium consists of a single layer of cells that lines body cavities and blood vessels. The shape of the cells in the epithelium reflects the function of the tissue. Cells in simple squamous epithelium appear as thin scales with flat, elliptical nuclei that mirror the form of the cell.
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相关实验视频

Updated: Apr 30, 2026

Functional Assessment of Intestinal Tight Junction Barrier and Ion Permeability in Native Tissue by Ussing Chamber Technique
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快照:上皮上紧密的结合点

Karl Matter1, Maria S Balda1

  • 1Department of Cell Biology, Institute of Ophthalmology, University College London, EC1V 9EL London, UK.

Cell
|May 13, 2014
PubMed
概括
此摘要是机器生成的。

紧密的结节在细胞表面之间形成屏障,控制通过什么. 它们对细胞极性和信号传递至关重要,影响细胞行为和基因表达.

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科学领域:

  • 细胞生物学 细胞生物学
  • 皮质生物学 皮质生物学
  • 分子生物学分子生物学

背景情况:

  • 紧密的结点建立了不同的顶端和底侧细胞表面域.
  • 它们起到类似细胞的扩散屏障的作用,分离不同组成的隔间.
  • 紧密的结点对于维持上皮细胞极性和调节信号通路至关重要.

研究的目的:

  • 为了说明紧接口的组件.
  • 为了描述紧密的结节的组织.
  • 为了解释上皮细胞中紧密结的多样性功能.

主要方法:

  • 审查现有的文学和研究关于紧接口的结构和功能.
  • 分析与紧密结合相关的形态和功能数据.
  • 综合了通过紧密结节调节的信号机制的信息.

主要成果:

  • 紧密结合是复杂的蛋白质结构,形成表皮细胞之间的密封.
  • 它们有效地调节了分子通过半细胞空间的通行.
  • 这些结点在细胞形状的确定和基因表达调节中起着关键作用.

结论:

  • 紧密的结点对于上皮质屏障功能和细胞极性至关重要.
  • 它们的组成部分和组织对于调节细胞过程至关重要.
  • 了解紧接节的功能,可以了解上皮细胞的生物学和疾病.