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Related Concept Videos

Activation of Integrins01:15

Activation of Integrins

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 events provide an effective stimulus.
Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

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...
Integrins01:10

Integrins

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,...
Cadherins in Tissue Organization01:19

Cadherins in Tissue Organization

The cadherins are a superfamily of cell adhesion molecules comprising over 180 variants, with specific tissues expressing a particular combination of cadherin types. Cadherins generally exhibit homophilic binding; i.e., cadherins on one cell bind to cadherins of the same or closely related type on another cell. Thus, cells of the same type have a specific affinity to bind to each other and sort themselves into clusters to form tissues.
Cell Sorting During Development
Cell sorting plays an...
Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
Overview of Cell-Matrix Interactions01:24

Overview of Cell-Matrix Interactions

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...

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Related Experiment Video

Updated: Jun 6, 2026

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

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Published on: March 8, 2017

Distinct regulatory mechanisms control integrin adhesive processes during tissue morphogenesis.

Mary Pines1, Michael J Fairchild, Guy Tanentzapf

  • 1Department of Cellular and Physiological Sciences, University of British Columbia, Life Sciences Institute, Vancouver, BC, Canada.

Developmental Dynamics : an Official Publication of the American Association of Anatomists
|November 20, 2010
PubMed
Summary

Cell adhesion is crucial for development and tissue stability. This study reveals that specific integrin functions are essential for embryonic development and tissue maintenance in Drosophila, highlighting the importance of precise regulation.

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Related Experiment Videos

Last Updated: Jun 6, 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

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

Tension Gauge Tether Probes for Quantifying Growth Factor Mediated Integrin Mechanics and Adhesion
09:56

Tension Gauge Tether Probes for Quantifying Growth Factor Mediated Integrin Mechanics and Adhesion

Published on: February 11, 2022

Area of Science:

  • Developmental Biology
  • Cell Biology
  • Biochemistry

Background:

  • Cell adhesion, mediated by integrins, is vital for tissue development and maintenance.
  • While in vitro studies detail integrin regulation, their in vivo developmental roles remain unclear.

Purpose of the Study:

  • To investigate the in vivo roles of integrin regulatory mechanisms during embryonic development.
  • To understand how perturbing integrin function affects tissue morphogenesis and maintenance.

Main Methods:

  • Utilized genetic mutations to activate or deactivate specific vertebrate β-integrin functions in Drosophila embryos.
  • Conducted in vivo phenotypic analyses to observe effects on tissue morphogenesis and maintenance.

Main Results:

  • Different morphogenetic processes rely on distinct integrin regulatory mechanisms.
  • Outside-in activation of integrins is critical for their developmental functions.
  • Integrin dysregulation impairs long-term adhesion, emphasizing the need for continuous regulation.

Conclusions:

  • Integrin regulation is dynamically controlled during development.
  • Precise integrin function is essential for both dynamic morphogenetic events and stable tissue maintenance.
  • In vivo studies are crucial for understanding the complex roles of integrin regulation in development.