Cited by 562Neuroinflammation and Neurodegeneration MechanismsNeurogenesis and neuroplasticity mechanismsNeuroscience and Neuropharmacology Research

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

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Tay, Tuan Leng, Savage, Julie C., Hui, Chin Wai, Bisht, Kanchan, Tremblay, Marie‐Ève·2017·The Journal of Physiology

Abstract

Microglia are the only immune cells that permanently reside in the central nervous system (CNS) alongside neurons and other types of glial cells. The past decade has witnessed a revolution in our understanding of their roles during normal physiological conditions. Cutting‐edge techniques revealed that these resident immune cells are critical for proper brain development, actively maintain health in the mature brain, and rapidly adapt their function to physiological or pathophysiological needs. In this review, we highlight recent studies on microglial origin (from the embryonic yolk sac) and the factors regulating their differentiation and homeostasis upon brain invasion. Elegant experiments tracking microglia in the CNS allowed studies of their unique roles compared with other types of resident macrophages. Here we review the emerging roles of microglia in brain development, plasticity and cognition, and discuss the implications of the depletion or dysfunction of microglia for our understanding of disease pathogenesis. Immune activation, inflammation and various other conditions resulting in undesirable microglial activity at different stages of life could severely impair learning, memory and other essential cognitive functions. The diversity of microglial phenotypes across the lifespan, between compartments of the CNS, and sexes, as well as their crosstalk with the body and external environment, is also emphasised. Understanding what defines particular microglial phenotypes is of major importance for future development of innovative therapies controlling their effector functions, with consequences for cognition across chronic stress, ageing, neuropsychiatric and neurological diseases. image

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  • Microglia in a homeostatic state use their ramified processes to survey the microenvironment in real time for potential signals that warrant further action.

    “Microglia in a homeostatic state use their ramified processes to survey the microenvironment in real time for potential signals that warrant further action.”

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  1. Tremblay ME, Stevens B, Sierra A, Wake H, Bessis A & Nimmerjahn A (2011). The role of microglia in the healthy brain. J Neurosci 31, 16064–16069. [DOI] [PMC free article] [PubMed] [Google Scholar]

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Authors
Tay, T. L., Savage, J. C., Hui, C. W., Bisht, K., & Tremblay, M.
Affiliations
  • University of Freiburg (DE)
  • Centre de recherche du CHU de Québec-Université Laval (CA)
Corresponding author
  • Tay, Tuan Leng
  • Tremblay, Marie‐Ève
Venue
The Journal of Physiology
Publisher
Wiley
Published
2016-05-29
Volume
595
Issue
6
Pages
1929-1945
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
OpenAlex
W2340464393
Cited by
562
References
171
Citations by year
2026: 31 · 2025: 55 · 2024: 67 · 2023: 61 · 2022: 71 · 2021: 70 · 2020: 61 · 2019: 65 · 2018: 44 · 2017: 28 · 2016: 8
FWCI
4.24
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Deutsche Forschungsgemeinschaft
  • Faculté de Médecine, Université Laval
  • Natural Sciences and Engineering Research Council of Canada
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
microglia, microglial origin, yolk sac, microglial differentiation, microglial homeostasis, brain development, neuroplasticity, cognition, learning and memory, neuroinflammation, microglial phenotype, sex differences, chronic stress, aging, neuropsychiatric disorders, neurological disorders, microglial depletion
MeSH terms
Aging, Animals, Brain, Cognition, Homeostasis, Humans, Microglia

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