Cited by 95Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsNeurological Disease Mechanisms and Treatments

Microglia in Alzheimer's Disease: It's All About Context

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Weitz, Tara M., Town, Terrence·2012·International Journal of Alzheimer's Disease

Abstract

Neuroinflammation is now regarded as both an early event and prime mover in the pathobiology of Alzheimer disease (AD), a neurodegenerative disease that represents a growing public health threat. As the resident innate immune cells within the central nervous system, microglia are centrally positioned as key orchestrators of brain inflammation. It is now accepted that numerous forms of activated microglia exist. Furthermore, while some types of reactive microglia are detrimental, others can actually be beneficial. In the context of AD etiopathology, much debate surrounds whether these enigmatic cells play “good” or “bad” roles. In this article, we distill a complex clinical and experimental literature focused on the contribution of microglia to AD pathology and progression. A synthesis of the literature only seems possible when considering context– the conditions under which microglia encounter and mount immunological responses to AD pathology. In order to carry out these diverse contextual responses, a number of key receptors and signaling pathways are variously activated. It will be critically important for future studies to address molecular mediators that lead to beneficial microglial responses and therefore represent important therapeutic targets for AD.

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Crossref · 10.1155/2012/314185

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  • Microglia are brain-resident innate immune effector cells and are widely thought to be the key mediators of amyloid beta clearance.

    “Microglia are brain-resident innate immune effector cells and are widely thought to be the key mediators of amyloid beta clearance [14–16].”

    From IL-1β-driven amyloid plaque clearance is associated with an expansion of transcriptionally reprogrammed microglia (2019) · cites this paper as [16]

    The Introduction identifies microglia as brain-resident macrophages involved in innate immune responses. But section 4.1 says they are generally regarded as inefficient Aβ phagocytes, and section 6 reports evidence that brain-resident microglia may not significantly affect plaque clearance. The paper therefore does not support calling them the key mediators of Aβ clearance. (LLM, conf=0.88)

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Research works printed but not linked: 4

  1. [32]Qiao X Cummins DJ Paul SM Neuroinflammation-induced acceleration of amyloid deposition in the APPV717F transgenic mouse European Journal of Neuroscience 2001 14 3 474 482 11553297
  2. [61]Town T Nikolic V Tan J The microglial “activation” continuum: from innate to adaptive responses Journal of Neuroinflammation 2005 2, article 24 PMC1298325 16259628
  3. [62]Colton CA Mott RT Sharpe H Xu Q van Nostrand WE Vitek MP Expression profiles for macrophage alternative activation genes in AD and in mouse models of AD Journal of Neuroinflammation 2006 3, article 27 PMC1609108 17005052
  4. [63]Colton CA Wilcock DM Assessing activation states in microglia CNS and Neurological Disorders 2010 9 2 174 191 20205642

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Authors
Weitz, T. M., & Town, T.
Affiliations
Cedars-Sinai Medical Center (US)
Corresponding author
Town, Terrence
Venue
International Journal of Alzheimer's Disease
Publisher
Wiley
Published
2012
Volume
2012
Pages
1-11
ISSN
  • 2090-0252 (ISSN-L)
  • 2090-8024
OpenAlex
W2114688326
Cited by
95
References
69
Citations by year
2026: 2 · 2025: 4 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 5 · 2020: 2 · 2019: 8 · 2018: 4 · 2017: 5 · 2016: 8 · 2015: 15 · 2014: 16 · 2013: 19 · 2012: 3
FWCI
8.54
Type
journal article
Language
en
Open access
Locations
  • International Journal of Alzheimer s Disease (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institute on Aging (5R00AG029726-04, 1R01NS076794-01, ZEN-10-174633)
  • National Institute of Neurological Disorders and Stroke (5R00AG029726-04, 1R01NS076794-01, ZEN-10-174633)
  • Alzheimer’s Association (5R00AG029726-04, 1R01NS076794-01, ZEN-10-174633)
  • American Federation of Aging Research/Ellison Medical Foundation Julie Martin Mid-Career Award (5R00AG029726-04, 1R01NS076794-01, ZEN-10-174633)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
microglia, Alzheimer's disease, neuroinflammation, reactive microglia, microglial activation, innate immunity, microglial receptors, signaling pathways, neurodegeneration, therapeutic target

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