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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,...
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...
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.
Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal01:22

Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal

Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.
Lineage Commitment01:21

Lineage Commitment

Commitment is the  process whereby stem cells:

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Related Experiment Video

Updated: Jun 26, 2026

Blastomere Explants to Test for Cell Fate Commitment During Embryonic Development
14:08

Blastomere Explants to Test for Cell Fate Commitment During Embryonic Development

Published on: January 26, 2013

Integrins and cell-fate determination.

Charles H Streuli1

  • 1Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK. cstreuli@manchester.ac.uk

Journal of Cell Science
|January 2, 2009
PubMed
Summary

This commentary explores how integrins, which are proteins that help cells stick to their surroundings, may influence cell fate decisions during mitosis. The author reviews existing research to show that integrins may control the direction of cell division and the orientation of the mitotic spindle. Integrins may also organize the cytoskeleton and cell shape, while influencing cell migration. New evidence suggests that integrins may determine daughter cell positioning in new microenvironments. The study highlights how integrins may extend their role beyond basic adhesion to include cell fate determination. The findings suggest that integrins may regulate the division axis through microenvironmental cues. These insights may help clarify how integrins contribute to cell fate decisions beyond their traditional roles.

Keywords:
Integrin signaling in cell divisionMitotic spindle orientationCell fate determinationCytoskeletal organizationIntegrin-based adhesion

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Area of Science:

  • Cell signaling pathways in developmental biology
  • Integrin-mediated adhesion in cell biology
  • Cytoskeletal organization in tissue engineering

Background:

The role of cell adhesion in biological processes is well established, with integrins recognized as key players in linking cells to their surroundings. Prior research has shown that integrins help organize the cytoskeleton and regulate cell migration. However, the extent to which integrins influence cell fate remains underexplored. While it was already known that integrins affect proliferation and apoptosis, the connection between integrins and mitotic spindle orientation was not fully understood. That uncertainty drove the need for a focused review on integrin functions in cell fate. No prior work had resolved how integrins might control division axis orientation. This gap motivated a deeper investigation into integrin signaling during mitosis. The literature suggests that integrins may influence daughter cell positioning, but the mechanisms remain unclear. This commentary aims to clarify how integrins contribute to cell fate decisions beyond their known roles.

Purpose Of The Study:

The goal of this commentary is to explore how integrins influence cell fate decisions, particularly during mitosis. The specific problem addressed is the role of integrins in determining the direction of cell division and mitotic spindle orientation. The motivation stems from the need to understand how integrins extend their influence beyond basic adhesion functions. The authors aim to synthesize current findings on integrin signaling in cell fate. They propose that integrins may regulate the mitotic spindle axis, which could affect daughter cell positioning. The study focuses on the mechanisms by which integrins control cell division orientation. The authors suggest that integrins may influence microenvironmental cues during mitosis. This work seeks to clarify how integrins contribute to cell fate beyond their traditional roles.

Main Methods:

The authors conducted a literature review to examine how integrins influence cell fate decisions. They analyzed existing studies on integrin function in cell adhesion and signaling. The review approach focused on integrin roles in mitotic spindle orientation and cell division direction. The authors synthesized findings from multiple disciplines, including cell biology and developmental biology. They examined how integrins interact with the extracellular matrix during mitosis. The study also considered the impact of integrin signaling on daughter cell positioning. The authors reviewed evidence linking integrin activity to cytoskeletal organization. They evaluated how integrins may control the division axis through microenvironmental cues.

Main Results:

The strongest finding is that integrins may control the mitotic spindle axis during cell division. The literature suggests that integrins influence daughter cell positioning in new microenvironments. Integrin-based adhesions appear to anchor the cytoskeleton and organize cell shape. These adhesions may also orchestrate cell migration and cytoskeletal organization. Integrins may regulate cell proliferation, apoptosis, and differentiation. New evidence indicates that integrins may determine the direction of cell division. The orientation of the mitotic spindle is proposed to be influenced by integrin signaling. This extends the role of integrins beyond basic adhesion to include cell fate determination.

Conclusions:

The authors propose that integrins may influence cell fate decisions by controlling the mitotic spindle axis. Their findings suggest that integrins may determine daughter cell positioning in new microenvironments. The commentary highlights how integrins may regulate cell division direction. The authors emphasize that integrins may extend their influence beyond adhesion functions. They suggest that integrins may organize the cytoskeleton and cell shape during mitosis. The literature reviewed indicates that integrins may control the division axis through microenvironmental cues. The authors conclude that integrins may influence cell fate decisions by orchestrating cytoskeletal organization. These findings suggest that integrins may play a broader role in cell fate than previously understood.

The authors propose that integrins may control the mitotic spindle axis, influencing daughter cell positioning in new microenvironments.

Integrin-based adhesions may anchor the cytoskeleton and organize cell shape, while also orchestrating cell migration.

The orientation of the mitotic spindle may determine daughter cell positioning, which could influence their behavior in new microenvironments.

Integrins may organize the cytoskeleton by linking cells to the extracellular matrix and forming adhesion complexes at the cell periphery.

Integrins may influence cell proliferation, apoptosis, and differentiation by controlling microenvironmental cues during mitosis.

The literature suggests that integrins may control daughter cell positioning by influencing the mitotic spindle axis.