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Related Experiment Video

Updated: May 4, 2026

Author Spotlight: In Vitro Co-Culture Model for Studying Microglia-Neuronal Interactions in Disease Conditions

Author Spotlight: In Vitro Co-Culture Model for Studying Microglia-Neuronal Interactions in Disease Conditions

Published on: July 26, 2024

Microglia promote learning-dependent synapse formation through brain-derived neurotrophic factor.

Christopher N Parkhurst¹, Guang Yang², Ipe Ninan³

¹Molecular Neurobiology Program, The Kimmel Center for Biology and Medicine at the Skirball Institute, Department of Neuroscience and Physiology, New York University School of Medicine, New York, NY 10016, USA.

|December 24, 2013

Summary

Microglia, the brain's immune cells, are crucial for learning and memory. This study shows they promote synapse formation via brain-derived neurotrophic factor (BDNF), essential for cognitive function.

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Culturing Microglia from the Neonatal and Adult Central Nervous System

Culturing Microglia from the Neonatal and Adult Central Nervous System

Published on: August 9, 2013

Area of Science:

Neuroscience
Immunology
Cell Biology

Background:

Microglia are CNS macrophages with known roles in pathology.
Their physiological functions in brain plasticity and cognition are not well understood.

Purpose of the Study:

To investigate the physiological roles of microglia in learning, memory, and synaptic plasticity.
To develop a method for specific microglial manipulation in the CNS.

Main Methods:

Generated CX3CR1(CreER) mice for inducible gene manipulation in microglia.
Depleted microglia using diphtheria toxin administration.
Assessed learning, memory, and synapse formation in depleted mice.
Examined the role of microglial brain-derived neurotrophic factor (BDNF) by genetic removal.

Main Results:

Microglia depletion impaired learning and motor-learning-dependent synapse formation.
Genetic removal of microglial BDNF mimicked the effects of microglia depletion.
Microglial BDNF enhances neuronal tropomyosin-related kinase receptor B phosphorylation, a key factor in synaptic plasticity.

Conclusions:

Microglia play essential physiological roles in learning and memory.
Microglia promote learning-related synapse formation through BDNF signaling.
Targeting microglial BDNF may offer therapeutic potential for cognitive disorders.