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Manganese neurotoxicity.

Allison W Dobson1, Keith M Erikson, Michael Aschner

  • 1Department of Physiology and Pharmacology, and Interdisciplinary Program in Neuroscience, Wake Forest University School of Medicine, Winston-Salem, North Carolina 27157-1083, USA.

Annals of the New York Academy of Sciences
|April 24, 2004
PubMed
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Manganese toxicity can cause Parkinson-like symptoms, a neurodegenerative disorder. Astrocytes play a key role in defending the brain against manganese neurotoxicity, potentially involving oxidative stress.

Area of Science:

  • Neuroscience
  • Toxicology
  • Environmental Health

Background:

  • Manganese is an essential trace element vital for enzymatic functions.
  • Manganese toxicity, often from occupational dust inhalation, primarily affects the brain.
  • Accumulation of manganese in the basal ganglia causes manganism, a neurodegenerative disorder with Parkinson-like symptoms.

Purpose of the Study:

  • To investigate the neurotoxic effects of manganese, particularly in relation to methylcyclopentadienyl manganese tricarbonyl (MMT).
  • To explore the mechanisms of manganese-induced neurotoxicity, focusing on oxidative stress and astrocyte involvement.
  • To review evidence linking oxidative stress to the progression of manganism.

Main Methods:

  • Review of existing literature on manganese toxicity and neurodegeneration.

Related Experiment Videos

  • Studies using primary astrocyte cultures to assess cellular defense mechanisms against manganese.
  • Analysis of manganese accumulation in brain regions and its correlation with disease pathology.

    • Main Results:

    • Primary astrocyte cultures demonstrate a critical role in defending against manganese-induced neurotoxicity.
    • Oxidative stress, potentially originating from mitochondrial dysfunction, is implicated as a key mechanism in neuronal cell death.
    • Populations with pre-existing neurodegenerative risks may be more vulnerable to manganese neurotoxicity.

    Conclusions:

    • Astrocyte-mediated defense mechanisms are crucial in mitigating manganese neurotoxicity.
    • Oxidative stress is a significant factor in the pathogenesis of manganism.
    • Further research into the health effects of MMT is warranted due to potential neurotoxic risks.