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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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30.6K
Anchoring Junctions01:03

Anchoring Junctions

4.3K
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:...
4.3K
Adherens Junctions01:24

Adherens Junctions

5.8K
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
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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.
Because of the thinness of the cells, simple squamous epithelium is present where the rapid passage of chemical compounds is observed. For example, the endothelium that lines the capillaries and vessels...
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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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スナップショット:上皮の緊密な接点

Karl Matter1, Maria S Balda1

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

Cell
|May 13, 2014
PubMed
まとめ
この要約は機械生成です。

緊密な接合は,細胞表面の間の障壁を作り,通過するものを制御します. 細胞の極性やシグナル伝達に不可欠であり,細胞の行動や遺伝子発現に影響を与えます.

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Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor
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Analysis of the Epithelial Damage Produced by Entamoeba histolytica Infection
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Last Updated: Apr 30, 2026

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Sensing of Barrier Tissue Disruption with an Organic Electrochemical Transistor
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科学分野:

  • 細胞生物学 細胞生物学
  • 皮質生物学 エピテリア生物学
  • 分子生物学は分子生物学である.

背景:

  • 緊密な接合は,異なる頂点と底辺の細胞表面領域を確立する.
  • それらはパラセルラー拡散障壁として機能し,異なる組成のコンパートメントを分離します.
  • 緊密な結合は,上皮細胞の極性を維持し,信号伝達経路の調節に不可欠です.

研究 の 目的:

  • 緊密な接点の構成要素を図解するために.
  • 緊密な接点の組織を記述するために.
  • 皮質細胞の緊密な接合の多様な機能を説明する.

主な方法:

  • 緊密結合の構造と機能に関する既存の文献と研究のレビュー.
  • 緊密な交差点に関連する形態学的および機能的データの分析.
  • 緊密な接合点によって制御される信号機構に関する情報の合成.

主要な成果:

  • 緊密な結合は,上皮細胞間のシールを形成する複雑なタンパク質構造です.
  • それらは,パラセルラー空間を通る分子の通過を効果的に調節する.
  • これらの交差点は,細胞の形状の決定と遺伝子発現の調節において重要な役割を果たします.

結論:

  • 緊密な接合は,上皮膜のバリア機能と細胞の極性のために不可欠です.
  • 細胞の構成要素と組織は,細胞のプロセスを調節する上で極めて重要です.
  • 緊密な接合の機能を理解することで,上皮細胞の生物学と疾患の洞察が得られます.