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関連する概念動画

Activation of Integrins01:15

Activation of Integrins

5.7K
Integrins bind ligands and transmit information from outside the cell to inside or vice-versa through an "outside-in signaling" or "inside-out signaling."
In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding...
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Integrins01:10

Integrins

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Animal and protozoan cells do not have cell walls to help maintain shape and provide structural stability. Instead, these eukaryotic cells secrete a sticky mass of carbohydrates and proteins into the spaces between adjacent cells. This network of proteins and molecules is called an extracellular matrix or ECM.
Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
6.2K
Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

3.9K
Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
3.9K
Fibronectins Connect Cells with ECM01:25

Fibronectins Connect Cells with ECM

3.8K
Fibronectin is an adhesive glycoprotein present in the extracellular matrix of embryogenic and adult tissue. These molecules primarily aid in regulating cell motility and attachment. A fibronectin molecule is composed of two identical polypeptide chains attached to each other by a pair of disulfide bonds at the C-terminal.
Both proteoglycans and collagen are attached to fibronectin proteins, which, in turn, are attached to integrin proteins. These integrin proteins interact with transmembrane...
3.8K
Anchoring Junctions01:03

Anchoring Junctions

5.7K
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:...
5.7K
Immunoglobulin-like Cell Adhesion Molecules01:31

Immunoglobulin-like Cell Adhesion Molecules

4.7K
Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
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Updated: Apr 15, 2026

Analyzing Cell Surface Adhesion Remodeling in Response to Mechanical Tension Using Magnetic Beads
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Analyzing Cell Surface Adhesion Remodeling in Response to Mechanical Tension Using Magnetic Beads

Published on: March 8, 2017

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MAP4K4はインテグリン-FERM結合を調節し,内皮細胞の運動性を制御する.

Philip Vitorino1, Stacey Yeung1, Ailey Crow1

  • 1Molecular Biology Department, Genentech, Inc., South San Francisco, California 94080, USA.

Nature
|March 25, 2015
PubMed
まとめ

MAP4K4,モエシン,タリン,β1-インテグリンを含む新しい分子経路は,内皮細胞の移動と膜収縮に不可欠です. この経路は,細胞の移動と血管形成を調節し,潜在的な治療目標を提供します.

さらに関連する動画

Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes
09:14

Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes

Published on: June 13, 2014

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Study of the Actin Cytoskeleton in Live Endothelial Cells Expressing GFP-Actin
08:37

Study of the Actin Cytoskeleton in Live Endothelial Cells Expressing GFP-Actin

Published on: November 18, 2011

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関連する実験動画

Last Updated: Apr 15, 2026

Analyzing Cell Surface Adhesion Remodeling in Response to Mechanical Tension Using Magnetic Beads
07:55

Analyzing Cell Surface Adhesion Remodeling in Response to Mechanical Tension Using Magnetic Beads

Published on: March 8, 2017

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Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes
09:14

Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes

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Study of the Actin Cytoskeleton in Live Endothelial Cells Expressing GFP-Actin
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Study of the Actin Cytoskeleton in Live Endothelial Cells Expressing GFP-Actin

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科学分野:

  • 細胞生物学 細胞生物学
  • 分子生物学は分子生物学である.
  • 血管新生研究の研究

背景:

  • 細胞の移動は,発達と疾患に不可欠な複雑なプロセスです.
  • 内皮細胞の移動の分子メカニズムを理解することは,血管新生を制御するために重要です.

研究 の 目的:

  • 内皮細胞の移動中にプラズマ膜の収縮を調節する重要な分子プレーヤーを特定する.
  • 細胞移動と血管新生におけるMAP4K4-モエシン-タリン-β1-インテグリン経路の機能的役割を明らかにする.

主な方法:

  • 短期干渉RNA (siRNA) と化学阻害剤を用いたインビトロ血管新生スクリーニング.
  • タンパク質のリン酸化とタンパク質とタンパク質の相互作用の分析.
  • 細胞移動,膜動力学,血管新生を評価するためのインビトロおよびインビボアッセイ.
  • 分子イベントの順序を決定するためのエピスタシス分析.

主要な成果:

  • MAP4K4-moesin-talin-β1-integrin経路が特定され,移住する内皮細胞における血膜収縮を促進しました.
  • MAP4K4の喪失は,内皮細胞の移動を阻害し,膜動態を低下させ,血管新生をインビトロおよびインビボで抑制した.
  • MAP4K4はモエシンをリン酸化し,タリンと β1-インテグリン結合を競い合い,焦点粘着の解体を促進する.
  • α5β1-インテグリンを阻害すると,MAP4K4の損失によって引き起こされた移住の欠陥が逆転した.
  • MAP4K4の阻害は,疾患モデルにおける病理的血管新生を抑制した.

結論:

  • MAP4K4は,モエシン-タリン-β1-インテグリン経路を通る内皮細胞移動の重要な調節体である.
  • この経路は,効率的な膜収縮と焦点粘着分解に不可欠です.
  • MAP4K4は,病理学的血管新生を含む疾患の有望な治療標的を代表しています.