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Updated: Jan 8, 2026

Mitochondrial Preparation from Microglia for Glycan Analysis
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Mitochondrial Preparation from Microglia for Glycan Analysis

Published on: May 30, 2025

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Dynamic changes in mitochondria support phenotypic flexibility of microglia

Katherine Espinoza1,2, Ari W Schaler1,2, Daniel T Gray1

  • 1Department of Physiology, David Geffen School of Medicine, UCLA, Los Angeles, USA.

Nature Communications
|December 12, 2025
PubMed

Insights

Mitochondria critically influence microglial (immune cells in the brain) phenotypes. This study reveals how brain region and aging impact microglial mitochondria, affecting their function and gene expression.

Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Microglia are key immune cells in the brain, known for their adaptability.
  • Mitochondria are increasingly recognized for their role in regulating cell phenotypes, particularly in macrophages.
  • The specific role of mitochondria in shaping microglial phenotypes remains largely unexplored.

Purpose of the Study:

  • To investigate the role of mitochondria in regulating microglial phenotypes.
  • To determine if mitochondrial mass and remodeling in microglia differ across brain regions and with aging.
  • To examine the impact of manipulating microglial mitochondria on microglial morphology and gene expression.

Main Methods:

  • Generation of transgenic mouse models for visualizing and manipulating microglial mitochondria.
  • Analysis of microglial mitochondrial mass and aging-associated remodeling across different brain regions.
  • Assessment of microglial gene expression related to inflammation, trophic functions, and phagocytosis.
  • Direct genetic manipulation of microglial mitochondria and subsequent analysis of microglial morphology and gene expression.

Main Results:

  • Significant regional differences in microglial mitochondrial mass and aging-associated remodeling were observed.
  • Microglial mitochondria showed rapid alterations within hours of LPS (lipopolysaccharide) stimulation.
  • Microglial gene expression profiles for inflammation, trophic support, and phagocytosis correlated strongly with mitochondria-related gene expression.
  • Direct genetic manipulation of microglial mitochondria resulted in altered microglial morphology and region-specific changes in gene expression.

Conclusions:

  • Mitochondria play a crucial role in establishing basal microglial phenotypes.
  • Mitochondria are key regulators of microglial phenotypic remodeling over various timescales (hours to months).
  • Understanding microglial mitochondria offers new insights into brain immune cell function and aging.

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