Microglia in early brain development: A window of opportunity
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Clarissa Catale1, Sonia Garel2
1Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, CNRS, INSERM, Université PSL, 75005, Paris, France.
Abstract:
Microglia, brain-resident macrophages, are increasingly recognized for their roles in early brain development, particularly during the prenatal and early postnatal periods. These cells enter the brain during embryogenesis, long before other glial populations fully emerge, and actively shape neural circuits while responding to environmental cues. During this critical window, microglia exhibit a remarkable diversity of states, some resembling those seen in neurodegeneration, suggesting that microglia use shared pathways across life stages. Here, we review emerging insights into how microglial states regulate early neurodevelopment and how their functional diversity influences brain physiology under both normal and immune-challenged conditions. Understanding these state-function relationships not only advances our knowledge of neurodevelopment but also informs potential therapeutic strategies for neurodevelopmental and neurodegenerative disorders.
Insights
Microglia, the brain's immune cells, play a crucial role in early brain development. Their diverse states influence neural circuits and brain health across life stages, offering therapeutic insights.
Area of Science:
- Neuroscience
- Immunology
- Developmental Biology
Background:
- Microglia are brain-resident macrophages essential for early brain development.
- They emerge during embryogenesis and shape neural circuits in response to environmental cues.
- Microglial states during development share pathways with those observed in neurodegeneration.
Purpose of the Study:
- To review emerging insights into microglial states during early neurodevelopment.
- To explore how microglial functional diversity impacts brain physiology under normal and immune-challenged conditions.
- To understand the state-function relationships of microglia in neurodevelopment.
Main Methods:
- Literature review of studies on microglia in early brain development.
- Analysis of research on microglial states and their functional implications.
- Synthesis of current knowledge on microglia-brain interactions.
Main Results:
- Microglia exhibit diverse states during prenatal and early postnatal development.
- These states are critical for shaping neural circuits and brain physiology.
- Shared pathways exist between developmental and neurodegenerative microglial states.
Conclusions:
- Microglial states are key regulators of early neurodevelopment.
- Understanding microglial functional diversity informs neurodevelopmental and neurodegenerative disorder research.
- Microglia offer potential therapeutic targets for brain disorders.
