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Updated: Dec 23, 2025
Author Spotlight: In Vitro Co-Culture Model for Studying Microglia-Neuronal Interactions in Disease Conditions
Published on: July 26, 2024
Regulation of microglia by neuromodulators: Modulations in major and minor modes
G Albertini1, F Etienne1, A Roumier1
1Institut national de la santé et de la recherche médicale (INSERM) UMR-S 1270, Paris, France; Sorbonne Université, Sciences and Engineering Faculty, Paris, France; Institut du Fer à Moulin, Paris, France.
Abstract:
Microglial cells, the brain resident macrophages, participate to brain development and function and help maintaining its homeostasis. To play these roles, they need to detect and adapt to modifications of their environment, including changes in the activity of neurons. The neuromodulators serotonin, dopamine, norepinephrine, acetylcholine and histamine are synthesized and released by specialized neurons to coordinate the activity of other neurons in different regions. In this review, we summarize the current evidence obtained in vitro or in vivo that neuromodulators act on microglia. On the short term, they can modify their motility, morphology and phagocytic activity; on the mid-long term they can modulate their transition between different immune activation states. Lastly, we review some recent data suggesting that these regulations of microglia by neuromodulators are involved in vivo in some aspects of central nervous system development, function and homeostasis.
Insights
Neuromodulators like serotonin and dopamine influence microglial cells, the brain's immune cells. This interaction impacts brain development, function, and homeostasis by altering microglial activity and immune states.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Microglial cells are brain-resident macrophages crucial for homeostasis, development, and function.
- They must sense and respond to environmental cues, including neuronal activity.
- Neuromodulators (serotonin, dopamine, norepinephrine, acetylcholine, histamine) coordinate neuronal activity.
Purpose of the Study:
- To review current evidence on neuromodulator actions on microglia.
- To explore the impact of neuromodulators on microglial short-term and long-term functions.
- To discuss the in vivo relevance of these interactions in CNS development and function.
Main Methods:
- In vitro studies examining direct neuromodulator-microglia interactions.
- In vivo studies assessing neuromodulator effects on microglia in a living organism.
- Literature review synthesizing existing research findings.
Main Results:
- Neuromodulators acutely affect microglial motility, morphology, and phagocytosis.
- Neuromodulators can modulate microglial immune activation states over longer periods.
- Evidence suggests these neuromodulator-microglia interactions are vital for CNS development and homeostasis.
Conclusions:
- Neuromodulators play a significant role in regulating microglial cell functions.
- These regulatory mechanisms are critical for maintaining central nervous system health.
- Further research into neuromodulator-microglia signaling is warranted for understanding brain function and disease.
