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相关概念视频

Tight Junctions01:29

Tight Junctions

5.3K
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...
5.3K
Overview of Cell-Cell Junctions01:14

Overview of Cell-Cell Junctions

25.5K
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...
25.5K
Adherens Junctions01:24

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
4.8K
Anchoring Junctions01:03

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
Gap Junctions01:27

Gap Junctions

8.0K
The cytoplasm of adjacent animal cells can exchange small molecules, ions, and secondary messengers via the communication channels which form the gap junctions. These junctions comprise a few hundred to thousands of molecular channels, each made of two halves, called the connexon hemichannel. A connexon is a hexamer of six transmembrane connexin proteins, which assemble radially, thus forming a pore or channel in the center. One connexon hemichannel docks with a corresponding connexon on the...
8.0K
Overview of Cell-Matrix Interactions01:24

Overview of Cell-Matrix Interactions

7.2K
The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
7.2K

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相关实验视频

Updated: Jun 27, 2025

Functional Assessment of Intestinal Tight Junction Barrier and Ion Permeability in Native Tissue by Ussing Chamber Technique
06:43

Functional Assessment of Intestinal Tight Junction Barrier and Ion Permeability in Native Tissue by Ussing Chamber Technique

Published on: May 26, 2021

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一个简短的指南,紧密的交叉路口.

Sandra Citi1, Michael Fromm2, Mikio Furuse3

  • 1Department of Molecular and Cellular Biology, University of Geneva, 30 Quai Ernest Ansermet, 1205 Geneva, Switzerland.

Journal of cell science
|May 7, 2024
PubMed
概括

紧接点 (TJs) 在多细胞生物中形成关键的细胞屏障. 研究已经对TJ结构,功能和调节有了更深入的了解,并确定了未来的挑战.

关键词:
在Actin中的Actin是Actin.屏障屏障是一种障碍.在Cingulin中,我们可以使用Cingulin.克劳迪恩·克劳丁 (Claudin Claudin) 是一个著名的艺术家.表面上皮质 (epithelium) 是一个层次的表皮.肌肉蛋白质 (myosin) 是一种欧克卢丁是一种隐蔽剂.透性 透性的两极的两极性紧密的结口是紧密的结口.ZO-1 是一个ZO-1

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Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor
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Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor

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Analysis of Protein-protein Interactions and Co-localization Between Components of Gap, Tight, and Adherens Junctions in Murine Mammary Glands
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Analysis of Protein-protein Interactions and Co-localization Between Components of Gap, Tight, and Adherens Junctions in Murine Mammary Glands

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相关实验视频

Last Updated: Jun 27, 2025

Functional Assessment of Intestinal Tight Junction Barrier and Ion Permeability in Native Tissue by Ussing Chamber Technique
06:43

Functional Assessment of Intestinal Tight Junction Barrier and Ion Permeability in Native Tissue by Ussing Chamber Technique

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Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor
11:17

Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor

Published on: February 10, 2014

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Analysis of Protein-protein Interactions and Co-localization Between Components of Gap, Tight, and Adherens Junctions in Murine Mammary Glands
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Analysis of Protein-protein Interactions and Co-localization Between Components of Gap, Tight, and Adherens Junctions in Murine Mammary Glands

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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
  • 生理学 生理学 生理学

背景情况:

  • 紧接点 (TJs) 是表皮和内皮组织中细胞间的重要接触点.
  • 它们会产生选择性细胞屏障,这对于分隔体液至关重要.
  • 形成TJ是多细胞生物的关键进化步骤.

研究的目的:

  • 在过去的六十年中,审查紧密结合研究的关键概念.
  • 突出了解TJ结构,功能,分子组成和调节方面的进展.
  • 确定紧密交叉领域的未来挑战和研究方向.

主要方法:

  • 这种观点综合了传输电子显微镜和随后的研究中现有的知识.
  • 它回顾了几十年来关于紧密结合的科学文献.
  • 没有产生新的实验数据;这是一个回顾和视角.

主要成果:

  • 在阐明密集结的分子结构和动态调节方面取得了重大进展.
  • 紧密结节在维护组织完整性和生理恒常的作用已被证实.
  • 已经确定了关键蛋白质家族及其在紧结复合体内的相互作用.

结论:

  • 紧密的结点是元动物生命的基础,使复杂的,细分化的生物体的发展成为可能.
  • 需要继续进行研究,才能充分理解TJ组装,拆卸以及它们在疾病中的作用.
  • 未来的努力应集中在TJ动态,治疗向和与其他细胞过程的集成上.