Cited by 1,047Neuroinflammation and Neurodegeneration MechanismsNeurological Disease Mechanisms and TreatmentsInflammasome and immune disorders

Microglial Activation and Chronic Neurodegeneration

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Lull, Melinda E., Block, Michelle L.·2010·Neurotherapeutics

Abstract

Microglia, the resident innate immune cells in the brain, have long been implicated in the pathology of neurodegenerative diseases. Accumulating evidence points to activated microglia as a chronic source of multiple neurotoxic factors, including tumor necrosis factor-α, nitric oxide, interleukin-1β, and reactive oxygen species (ROS), driving progressive neuron damage. Microglia can become chronically activated by either a single stimulus (e.g., lipopolysaccharide or neuron damage) or multiple stimuli exposures to result in cumulative neuronal loss with time. Although the mechanisms driving these phenomena are just beginning to be understood, reactive microgliosis (the microglial response to neuron damage) and ROS have been implicated as key mechanisms of chronic and neurotoxic microglial activation, particularly in the case of Parkinson's disease. We review the mechanisms of neurotoxicity associated with chronic microglial activation and discuss the role of neuronal death and microglial ROS driving the chronic and toxic microglial phenotype.

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Crossref · 10.1016/j.nurt.2010.05.014

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  • Aberrant gliosis causes detrimental neuroinflammation that can influence tau pathology and accelerate neurodegeneration.

    “The notion that neuroinflammatory processes contribute to disease was once provocative, yet recent studies have uncovered multiple mechanisms by which aberrant gliosis causes detrimental neuroinflammation that can influence tau pathology and accelerate neurodegeneration.”

    From Glial contributions to neurodegeneration in tauopathies (2017) · cites this paper as [6]

  • After acute M1 activation, microglial cells can suffer an uncontrolled activation leading to a state of chronic inflammation; in this state, microglia release neurotoxic inflammatory factors (TNF-α, IL-1α, IL-1β, IL-6, NO, hydrogen peroxide, superoxide anion, chemokines, and glutamate), which lead to neuronal death.

    “After this acute M1 activation, microglial cells can suffer an uncontrolled activation leading to a state of chronic inflammation. In this state, microglia release neurotoxic inflammatory factors (TNF-α, IL-1α, IL-1β, IL-6, NO, hydrogen peroxide, superoxide anion, chemokines, and glutamate), which lead to neuronal death (Block et al., 2007; Lull and Block, 2010; Burguillos et al., 2011; Kettenmann”

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Research works printed but not linked: 2

  1. [139]Wu XF Block ML Zhang W The role of microglia in paraquat-induced dopaminergic neurotoxicity Antioxid Redox Signal 2005 7 654 661 15890010
  2. [174]Niehaus I Lippopolysaccharides induce inflammation-mediated neurodeheneration in the substantia nigra and the cerebral cortex (A case report) AD/PD 6th International Conference 2003 1 38

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Authors
Lull, M. E., & Block, M. L.
Affiliations
Virginia Commonwealth University (US)
Corresponding author
Block, Michelle L.
Venue
Neurotherapeutics
Publisher
Elsevier BV
Published
2010-10
Volume
7
Issue
4
Pages
354-365
ISSN
1878-7479 (ISSN-L)
OpenAlex
W2050320551
Cited by
1,047
References
182
Citations by year
2026: 50 · 2025: 112 · 2024: 94 · 2023: 60 · 2022: 84 · 2021: 95 · 2020: 84 · 2019: 78 · 2018: 83 · 2017: 76 · 2016: 73 · 2015: 43 · 2014: 38 · 2013: 28 · 2012: 30
FWCI
14.71
Type
journal article
Language
en
Open access
Locations
  • Neurotherapeutics (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Fisher Digital Publications (St. John Fisher College) (submittedVersion)
Funders
  • National Institutes of Health
  • National Institute of Environmental Health Sciences (R01ES016951, R00ES01549)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
Keywords
microglial activation, neurodegeneration, reactive microgliosis, reactive oxygen species, neuroinflammation, neurotoxicity, Parkinson's disease, neuronal cell death, lipopolysaccharide, TNF-α, nitric oxide, IL-1β
MeSH terms
Animals, Chronic Disease, Dopamine, Humans, Models, Biological, Neurons, Oxidation-Reduction, Signal Transduction, Reactive Oxygen Species, Microglia, NADPH Oxidases, Neurodegenerative Diseases

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