Related Experiment Video

Updated: Jun 24, 2026

Two-photon Imaging of Microglial Processes' Attraction Toward ATP or Serotonin in Acute Brain Slices
07:27

Two-photon Imaging of Microglial Processes' Attraction Toward ATP or Serotonin in Acute Brain Slices

Published on: January 31, 2019

Glutamate induces directed chemotaxis of microglia

Guo Jun Liu1, Rajini Nagarajah, Richard B Banati

  • 1The Neurobiology Laboratory, Brain and Mind Research Institute, University of Sydney, NSW, Australia.

The European Journal of Neuroscience
|March 24, 2009
PubMed

Insights

Glutamate, a brain transmitter, acts as a chemotaxic agent, guiding microglia to injury sites. This microglial response involves specific glutamate receptors and cytoskeletal changes, aiding in brain injury repair.

Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Microglia are brain immune cells that respond to injury.
  • ATP is a known chemotaxic agent for microglia.
  • The role of other neurotransmitters in microglial chemotaxis is less understood.

Purpose of the Study:

  • To investigate if glutamate acts as a chemotaxic agent for microglia.
  • To identify the receptors and cellular mechanisms involved in glutamate-induced microglial migration.

Main Methods:

  • Microglial cell cultures and spinal cord slices were used.
  • Cells were exposed to glutamate, and migration was observed.
  • Specific glutamate receptor antagonists (AMPA and mGluR) were employed.
  • Changes in actin and tubulin cytoskeleton were analyzed.

Main Results:

  • Glutamate exposure induced microglial membrane ruffling and migration towards the glutamate source.
  • This chemotaxis was mediated by alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA) and metabotropic glutamate receptors.
  • Glutamate-induced migration depended on the redistribution of actin filaments and tubulin.

Conclusions:

  • Glutamate is identified as a novel chemotaxic agent for microglia.
  • Glutamate signaling via AMPA and mGluRs plays a role in microglial injury response.
  • This finding highlights glutamate's role in mediating rapid microglial responses at synapses and sites of cell damage.

More Related Videos

Primary Microglia Isolation from Mixed Glial Cell Cultures of Neonatal Rat Brain Tissue10:20

Primary Microglia Isolation from Mixed Glial Cell Cultures of Neonatal Rat Brain Tissue

Published on: August 15, 2012

An Antibody Feeding Approach to Study Glutamate Receptor Trafficking in Dissociated Primary Hippocampal Cultures08:13

An Antibody Feeding Approach to Study Glutamate Receptor Trafficking in Dissociated Primary Hippocampal Cultures

Published on: August 2, 2019

Related Concept Videos

Chemotaxis and Direction of Cell Migration01:21

Chemotaxis and Direction of Cell Migration

Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon towards...
Chemotaxis in E. coli01:27

Chemotaxis in E. coli

Chemotaxis in Escherichia coli is a sensory-driven motility mechanism that enables bacteria to navigate chemical gradients, moving toward beneficial environments while avoiding harmful conditions. This process relies on a signal transduction system integrating external chemical cues with flagellar motor control.Chemoreceptors and Signal DetectionE. coli detects chemical gradients through methyl-accepting chemotaxis proteins (MCPs), which are membrane-bound chemoreceptors that sense attractants...