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Related Concept Videos

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."
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Integrins01:10

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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.
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Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
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Electricity is generated by either electrons or ions flowing through a solution or a conducting medium. This flow of electrons or specifically electrical charge is defined as an electric current. When electrons move through a wire, they generate an electric current. It can be recalled  that in a redox reaction, electrons are lost and gained. In the spontaneous redox reaction of zinc  with copper, when zinc is immersed in a copper ion solution, a transfer of electrons from one substance to...
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Intermolecular forces (IMF) are electrostatic attractions arising from charge-charge interactions between molecules. The strength of the intermolecular force is influenced by the distance of separation between molecules. The forces significantly affect the interactions in solids and liquids, where the molecules are close together. In gases, IMFs become important only under high-pressure conditions (due to the proximity of gas molecules). Intermolecular forces dictate the physical properties of...
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Imaging Integrin Tension and Cellular Force at Submicron Resolution with an Integrative Tension Sensor
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Integrin activation by talin, kindlin and mechanical forces.

Zhiqi Sun1, Mercedes Costell2, Reinhard Fässler3

  • 1Max Planck Institute of Biochemistry, Martinsried, Germany. zsun@biochem.mpg.de.

Nature Cell Biology
|January 4, 2019
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Summary

Integrins, crucial for cell adhesion and development, are regulated by talin, kindlin, and mechanical forces. This perspective explores how these factors control integrin function and inactivation in disease.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biophysics

Background:

  • Integrins are key cell adhesion molecules mediating interactions with the extracellular matrix.
  • These molecules play vital roles in embryonic development and are implicated in diseases like cancer and inflammation.

Purpose of the Study:

  • To provide a comprehensive overview of the regulation of integrin affinity and avidity.
  • To discuss the roles of talin, kindlin, and mechanical forces in integrin activation.
  • To examine the function of integrin inactivators within this regulatory framework.

Main Methods:

  • Literature review and synthesis of current research.
  • Discussion of molecular mechanisms underlying integrin regulation.
  • Analysis of the interplay between cellular components and mechanical cues.

Main Results:

  • Talin and kindlin are identified as critical positive regulators of integrin function.
  • Mechanical forces significantly modulate integrin affinity and avidity.
  • Integrin inactivators act as crucial counter-regulators, maintaining cellular homeostasis.

Conclusions:

  • Understanding integrin regulation by talin, kindlin, and mechanical forces is essential for comprehending development and disease.
  • Targeting integrin pathways offers potential therapeutic strategies for inflammatory and metastatic diseases.
  • Further research into integrin inactivation mechanisms can reveal novel therapeutic targets.