Microglia across the lifespan: from origin to function in brain development, plasticity and cognition

Area of Science:

• Neuroscience
• Immunology
• Cell Biology

Background:

• Microglia are the resident immune cells of the central nervous system (CNS).
• Recent advances have revolutionized understanding of microglial roles in brain physiology.
• These cells are crucial for brain development, maintenance, and adaptation.

Purpose of the Study:

• To review recent findings on microglial origin, differentiation, and homeostasis.
• To explore the unique roles of microglia compared to other macrophages.
• To discuss the implications of microglial dysfunction in disease pathogenesis.

Main Methods:

• Review of cutting-edge techniques and elegant experiments.
• Analysis of studies tracking microglia in the CNS.
• Synthesis of recent research on microglial phenotypes and functions.

Main Results:

• Microglia originate from the embryonic yolk sac and are regulated by specific factors.
• They play critical roles in brain development, plasticity, and cognition.
• Microglial dysfunction is linked to impaired learning, memory, and cognitive functions.

Conclusions:

• Understanding microglial diversity across lifespan, sex, and CNS compartments is crucial.
• Targeting microglial effector functions offers potential therapeutic strategies for neurological and psychiatric diseases.
• Further research into microglial phenotypes is essential for developing innovative treatments.