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Related Experiment Video

Updated: May 12, 2026

Isolation of Mouse Primary Microglia by Magnetic-Activated Cell Sorting in Animal Models of Demyelination
04:53

Isolation of Mouse Primary Microglia by Magnetic-Activated Cell Sorting in Animal Models of Demyelination

Published on: April 5, 2022

Origin and differentiation of microglia.

Florent Ginhoux1, Shawn Lim, Guillaume Hoeffel

  • 1Singapore Immunology Network, Agency for Science, Technology, and Research Singapore.

Frontiers in Cellular Neuroscience
|April 26, 2013
PubMed
Summary

Microglia, the central nervous system (CNS) immune cells, originate from embryonic yolk sac progenitors and are vital for brain health and homeostasis. Their roles in neuronal development and synaptic formation are increasingly recognized.

Keywords:
central nervous systemmacrophagemicrogliaoriginyolk sac

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Last Updated: May 12, 2026

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Area of Science:

  • Neuroscience
  • Immunology
  • Developmental Biology

Background:

  • Microglia are the primary immune cells residing in the central nervous system (CNS).
  • Their functions extend beyond immune surveillance to include maintaining brain homeostasis and regulating neuronal development.
  • Historically, the precise origin of microglia has been a subject of debate due to experimental challenges.

Purpose of the Study:

  • To review the historical understanding of microglia.
  • To discuss recent advancements in understanding microglial origin, differentiation, and homeostasis.
  • To highlight the multifaceted roles of microglia in CNS health and disease.

Main Methods:

  • Review of historical literature on microglia.
  • Analysis of recent developmental biology studies on microglial origins.
  • Synthesis of current research on microglial function and homeostasis.

Main Results:

  • Microglia originate from embryonic yolk sac progenitors.
  • These progenitors migrate to the brain during early development and persist into adulthood.
  • Microglia play fundamental roles in neuronal proliferation, differentiation, and synapse formation.

Conclusions:

  • The embryonic yolk sac origin of microglia is now well-established.
  • Understanding microglial development and homeostasis offers new therapeutic targets for neurological diseases.
  • Microglia are critical regulators of CNS function throughout life.