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

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Microglial degeneration in the aging brain--bad news for neurons?

Wolfgang J Streit1, Kelly R Miller, Kryslaine O Lopes

  • 1Department of Neuroscience, University of Florida, Gainesville, FL 32610, USA. streit@mbi.ufl.edu

Frontiers in Bioscience : a Journal and Virtual Library
|May 30, 2008
PubMed

Insights

Microglial cells, crucial for brain health, may decline with age and disease, contributing to neurodegeneration. This review explores microglial activation, senescence, degeneration, and their impact on aging brains.

Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Microglial cells are traditionally viewed as beneficial immune sentinels in the central nervous system (CNS).
  • They provide neuroprotection and support neuronal function, especially following injury.
  • Recent findings highlight degenerating microglial cells in aging and neurodegenerative diseases.

Purpose of the Study:

  • To review microglial activation, senescence, and degeneration.
  • To explore the role of oxidative stress in microglial degeneration.
  • To discuss microglial involvement in amyloid clearance and its compromise during aging.

Main Methods:

  • Literature review and synthesis of existing research on microglial function.
  • Comparative analysis of microglial activation versus senescence and degeneration.
  • Discussion of proposed mechanisms, including oxidative stress and amyloid degradation.

Main Results:

  • Microglial cells exhibit distinct characteristics when activated, senescent, or degenerating.
  • Oxidative stress is a potential contributor to microglial degeneration.
  • Impaired amyloid clearance by aging microglia may compromise neuroprotection.

Conclusions:

  • Loss of microglial neuroprotective functions may contribute to age-related neurodegeneration.
  • Understanding microglial dynamics is crucial for addressing neurodegenerative diseases.
  • Targeting microglial health could offer therapeutic strategies for aging brains.

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