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In Vivo Dynamics of Retinal Microglial Activation During Neurodegeneration: Confocal Ophthalmoscopic Imaging and Cell Morphometry in Mouse Glaucoma
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Microglial activation and chronic neurodegeneration

Melinda E Lull1, Michelle L Block

  • 1Department of Anatomy and Neurobiology, Virginia Commonwealth University Medical Campus, Richmond, Virginia 23298, USA.

Neurotherapeutics : the Journal of the American Society for Experimental Neurotherapeutics
|October 1, 2010
PubMed

Insights

Activated microglia release neurotoxic factors, driving neuron damage in neurodegenerative diseases. Reactive microgliosis and reactive oxygen species (ROS) are key to this chronic, toxic microglial phenotype, especially in Parkinson's disease.

Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Microglia, the brain's immune cells, are implicated in neurodegenerative diseases.
  • Activated microglia release neurotoxic factors, causing progressive neuron damage.
  • Chronic microglial activation can result from single or multiple stimuli.

Purpose of the Study:

  • To review mechanisms of neurotoxicity from chronic microglial activation.
  • To discuss the role of neuronal death and microglial ROS in chronic microglial activation.
  • To elucidate the chronic and toxic microglial phenotype.

Main Methods:

  • Literature review of microglial activation and neurotoxicity.
  • Analysis of factors released by activated microglia.
  • Examination of reactive oxygen species (ROS) in microglial function.

Main Results:

  • Chronic microglial activation is a source of neurotoxic factors (TNF-α, NO, IL-1β, ROS).
  • Reactive microgliosis and ROS are implicated in chronic microglial activation, particularly in Parkinson's disease.
  • Neuronal death contributes to the chronic and toxic microglial phenotype.

Conclusions:

  • Understanding chronic microglial activation is crucial for neurodegenerative disease research.
  • Targeting microglial ROS may offer therapeutic strategies for Parkinson's disease.
  • Microglial-mediated neurotoxicity is a significant factor in progressive neuronal loss.

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