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Related Concept Videos

Integrins01:10

Integrins

4.8K
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,...
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Activation of Integrins01:15

Activation of Integrins

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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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Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

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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...
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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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Anchoring Junctions01:03

Anchoring Junctions

4.2K
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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Selectins01:25

Selectins

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Cell adhesion is  an essential aspect of multicellularity. While stable cell interactions usually occur between cells of the same type, transient cell interactions occur between cells of different tissue types, such as between neutrophils and endothelial cells. Selectins are one class of cell adhesion molecules (CAMs) that bind carbohydrate ligands to form transient cell adhesion. They are rod-like proteins with a long extracellular part of variable length ending with the lectin domain,...
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Related Experiment Video

Updated: Apr 27, 2026

Author Spotlight: Development of a Method for Identifying Small Molecular Antagonists of &#946;2 Integrin Activation
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Author Spotlight: Development of a Method for Identifying Small Molecular Antagonists of β2 Integrin Activation

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Integrin α1β1.

Humphrey Gardner1

  • 1Translational Medicine, Astrazeneca, 35 Gatehouse Drive, Waltham, MA, 02451, USA, humphrey.gardner@astrazeneca.com.

Advances in Experimental Medicine and Biology
|July 16, 2014
PubMed
Summary
This summary is machine-generated.

Integrin alpha1beta1 (α1β1) is crucial for immune cell survival and tissue retention, impacting T cell memory and autoimmunity. Its unique signaling makes it a promising therapeutic target for immune-related diseases.

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Area of Science:

  • Immunology
  • Cell Biology
  • Integrin Signaling

Background:

  • Integrin α1β1 is expressed in mesenchymal and immune cells, and some epithelial tissues.
  • α1β1 signaling regulates extracellular matrix and provides unique proliferative/survival signals.
  • It plays a role in immune cell retention, survival, T cell memory, and autoimmunity.

Purpose of the Study:

  • To investigate the role of Integrin α1β1 in immune cell function and survival.
  • To explore the potential of α1β1 as a therapeutic target in immune-related diseases.

Main Methods:

  • Studies utilized α1 null mice to assess the in vivo function of α1β1.
  • Development and application of therapeutic monoclonal antibodies targeting α1β1.

Main Results:

  • α1β1 mediates tissue retention and long-term survival of immune cells like monocytes and T cells.
  • This integrin contributes to peripheral T cell memory formation.
  • Dysregulation of α1β1 is implicated in autoimmune diseases.

Conclusions:

  • Integrin α1β1 plays a significant role in immune cell homeostasis and function.
  • Its immune functions present a rational basis for targeting α1β1 therapeutically.