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Platelet monoamine oxidase B activity and vitamin B12 in dementia

P Fischer1, M E Götz, B Ellinger

  • 1Psychiatric Clinic, University of Vienna, Austria.

Biological Psychiatry
|May 15, 1994
PubMed

Insights

Platelet monoamine oxidase B (MAO-B) activity strongly correlates with dementia severity in Alzheimer's patients. This study found no link between low vitamin B12 levels and increased MAO-B activity in geriatric hospital patients.

Area of Science:

  • Neuroscience
  • Biochemistry

Background:

  • Dementia, particularly Alzheimer's type, poses a significant health challenge.
  • Platelet monoamine oxidase B (MAO-B) is an enzyme implicated in neurotransmitter metabolism.
  • Understanding biomarkers for dementia severity is crucial for patient management.

Purpose of the Study:

  • To investigate the correlation between platelet MAO-B activity and the severity of probable Alzheimer's type dementia.
  • To examine the relationship between vitamin B12 levels and MAO-B activity in this patient cohort.

Main Methods:

  • Assessed platelet MAO-B activity in 39 patients with probable Alzheimer's dementia and 18 age-matched controls.
  • Measured serum vitamin B12 levels in the patient group.
  • Patients were inpatients in a geriatric hospital with controlled nutrition.

Main Results:

  • A high correlation was observed between platelet MAO-B activity and dementia severity.
  • No significant association was found between low vitamin B12 levels and high MAO-B activity.

Conclusions:

  • Platelet MAO-B activity may serve as a potential biomarker for Alzheimer's dementia severity.
  • Vitamin B12 status, within the context of controlled hospital nutrition, did not appear to influence MAO-B activity in this study population.

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