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Integrins

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.
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Activation of Integrins

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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 Adhesions

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Some...

Integration of Synaptic Events

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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...

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Related Experiment Video

Updated: Mar 12, 2026

An Endothelial Planar Cell Model for Imaging Immunological Synapse Dynamics

An Endothelial Planar Cell Model for Imaging Immunological Synapse Dynamics

Published on: December 24, 2015

Integrins in synapse regulation.

Yun Kyung Park¹, Yukiko Goda¹

¹RIKEN Brain Science Institute, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.

Nature Reviews. Neuroscience

|November 5, 2016

Summary

This summary is machine-generated.

Integrins, crucial receptors at brain synapses, sense environmental changes to regulate neural circuit function. This study synthesizes their roles in synapse development, plasticity, and memory.

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Area of Science:

Neuroscience
Cell Biology
Molecular Biology

Background:

Integrins are key cell surface receptors for the extracellular matrix (ECM).
Synapses, the communication junctions between neurons, are rich in integrins in both developing and adult brains.
The unique synaptic structure positions integrins to monitor and influence neural communication.

Purpose of the Study:

To synthesize current understanding of synaptic integrin functions.
To explore the roles of integrins in neural development and plasticity.
To highlight integrins' importance in shaping neural circuit properties.

Main Methods:

Review and synthesis of existing literature on integrin function in the brain.
Analysis of studies detailing integrin roles in synapse formation and plasticity.
Integration of findings on integrins' impact on neural circuit development and memory.

Main Results:

Synaptic integrins are strategically located to sense the synaptic environment.
Integrins regulate critical processes including neural outgrowth, synapse formation, and synaptic plasticity.
These functions collectively influence learning and memory.

Conclusions:

Integrins play a vital, multifaceted role in synaptic function and neural circuit organization.
Understanding synaptic integrin dynamics is crucial for comprehending brain development and function.
Further research into integrins promises insights into neurological disorders and cognitive processes.