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Related Experiment Video

Updated: Oct 13, 2025

Inducing Plasticity of Astrocytic Receptors by Manipulation of Neuronal Firing Rates

Inducing Plasticity of Astrocytic Receptors by Manipulation of Neuronal Firing Rates

Published on: March 20, 2014

Spatial synaptic modulation through IP3 diffusion triggered by ECB: a computational study with an astrocyte-neurons

Osamu Araki¹, Yusuke Nakahama¹, Tomokazu Urakawa¹

¹Department of Applied Physics, Tokyo University of Science, Tokyo, Japan.

Cognitive Neurodynamics

|November 18, 2021

Summary

This summary is machine-generated.

Astrocyte-neuron interactions reveal spatial patterns in synaptic modulation. Inositol-1,4,5-trisphosphate (IP3) diffusion mediates endocannabinoid (ECB) signaling, creating doughnut-shaped regions of suppression and potentiation.

Keywords:

Astrocyte Astrocyte–neurons model Endocannabinoid Inositol-1,4,5-trisphosphate

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Dual Electrophysiological Recordings of Synaptically-evoked Astroglial and Neuronal Responses in Acute Hippocampal Slices

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Published on: November 26, 2012

Area of Science:

Neuroscience
Computational Neuroscience
Astrocyte Biology

Background:

Functional interactions between neurons and astrocytes are increasingly understood.
Endocannabinoid (ECB)-mediated synaptic plasticity, including depolarization-induced suppression of excitation (DSE) and astrocyte-mediated synaptic potentiation (eSP), suggests global heterosynaptic modulation.
The spatial mechanisms underlying neural network modulation by astrocytes remain unclear.

Purpose of the Study:

To investigate the spatial distribution of DSE and eSP.
To elucidate the role of astrocyte signaling in mediating synaptic modulation.
To explore the contribution of inositol-1,4,5-trisphosphate (IP3) diffusion in astrocyte-neuron communication.

Main Methods:

Development of computational astrocyte-neuron models.
Simulation of endocannabinoid (ECB) release and diffusion within astrocytes.
Modeling of calcium (Ca2+) dynamics and IP3 signaling in astrocytes.

Main Results:

Computational models predicted distinct spatial patterns of DSE and eSP.
Doughnut-shaped regions of DSE, eSP, and combined effects were observed radiating from central ECB release points.
The spatial distribution was sensitive to the assumed diffusion of IP3 within astrocytes.

Conclusions:

IP3 diffusion within astrocytes is a key factor in mediating the spatial spread of synaptic modulation.
Astrocyte signaling plays a critical role in shaping network-level synaptic plasticity.
These findings provide a mechanistic basis for understanding how astrocytes influence neuronal network function.