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Updated: Oct 11, 2026

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
05:47

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Manganese catalyzed auto-oxidation of dopamine to 6-hydroxydopamine in vitro

C D Garner1, J P Nachtman

  • 1Biomedical Science Department, General Motors Research Laboratories, Warren, MI 48090-9058.

Chemico-Biological Interactions
|January 1, 1989
PubMed

Insights

Excess manganese exposure can cause Parkinson

Area of Science:

  • Neuroscience
  • Toxicology
  • Biochemistry

Background:

  • Manganese (Mn) is essential but toxic in excess.
  • Excess Mn exposure causes neurological issues similar to Parkinson's disease.
  • Mn is potent in stimulating dopamine (DA) auto-oxidation.

Purpose of the Study:

  • To investigate the mechanism linking manganese exposure to neurotoxicity.
  • To determine if Mn catalyzes dopamine auto-oxidation.

Main Methods:

  • Incubating dopamine (DA) under physiological conditions.
  • Comparing DA oxidation in the presence and absence of Mn.
  • Measuring the production of 6-hydroxydopamine (6-OHDA).

Main Results:

  • Manganese (Mn) significantly increased dopamine (DA) auto-oxidation.
  • 6-Hydroxydopamine (6-OHDA), a neurotoxicant, was produced in the presence of Mn.
  • No DA oxidation occurred without Mn.

Conclusions:

  • Mn catalyzes DA auto-oxidation.
  • This Mn-induced DA oxidation may mechanistically explain Mn neurotoxicity.
  • This links Mn exposure to Parkinson's-like symptoms.

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