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The gut–brain axis is a bidirectional communication system that connects the gastrointestinal tract and the brain. This interaction is mediated through multiple pathways, including the vagus nerve, hormonal signals, immune responses, and chemical messengers produced by gut microbes.Microbial Contributions to Brain FunctionGut microbiota contributes significantly to brain function by producing neuroactive compounds. These include neuroactive compounds that influence neurotransmitters such as...

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Related Experiment Video

Updated: May 19, 2026

Live Imaging and Characterization of Microglia Dynamics in the Zebrafish Embryo
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Live Imaging and Characterization of Microglia Dynamics in the Zebrafish Embryo

Published on: May 17, 2024

Microglia in development: linking brain wiring to brain environment.

Rosa C Paolicelli1, Cornelius T Gross

  • 1Mouse Biology Unit, European Molecular Biology Laboratory (EMBL), Monterotondo, Italy.

Neuron Glia Biology
|August 4, 2012
PubMed
Summary
This summary is machine-generated.

Microglia, immune cells in the brain, actively survey their surroundings and prune synapses during development. This surveillance links environmental changes to brain wiring, influencing neural connectivity.

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Flow Cytometry and Single-Cell Analysis for Characterizing Microglia Activation in Early Postnatal Mouse Brain Development
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Flow Cytometry and Single-Cell Analysis for Characterizing Microglia Activation in Early Postnatal Mouse Brain Development

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Related Experiment Videos

Last Updated: May 19, 2026

Live Imaging and Characterization of Microglia Dynamics in the Zebrafish Embryo
07:45

Live Imaging and Characterization of Microglia Dynamics in the Zebrafish Embryo

Published on: May 17, 2024

Flow Cytometry and Single-Cell Analysis for Characterizing Microglia Activation in Early Postnatal Mouse Brain Development
09:48

Flow Cytometry and Single-Cell Analysis for Characterizing Microglia Activation in Early Postnatal Mouse Brain Development

Published on: October 3, 2025

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Immunology

Background:

  • Microglia are brain-resident immune cells with known roles in injury response.
  • Their function in the healthy, developing brain remains less understood.
  • Previous research focused on microglia's role in pathogenic stimuli and brain injury.

Purpose of the Study:

  • To explore the function of microglia in the uninjured, developing brain.
  • To propose a model for how microglia influence brain connectivity.
  • To investigate the role of microglia in synaptic pruning and maturation.

Main Methods:

  • In vivo imaging studies to observe microglia behavior.
  • Analysis of microglia's phagocytic activity on synapses.
  • Literature review and hypothesis development.

Main Results:

  • Resting microglia exhibit high motility and actively survey neuronal environments.
  • Microglia in the resting state phagocytose synapses, contributing to synaptic pruning.
  • Microglia's sensitivity to stimuli suggests a role in linking environment to brain wiring.

Conclusions:

  • Microglia play a crucial role in sculpting brain connectivity during development.
  • Microglia act as a bridge between environmental changes and brain wiring adjustments.
  • A model is proposed for microglia-mediated synaptic refinement in the developing brain.