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Association of variations in monoamine oxidases A and B with Parkinson's disease subgroups

A Parsian1, B Racette, Z H Zhang

  • 1Department of Molecular and Cellular Biology, University of Louisville Health Sciences Center, 501 S Preston Street, Rm 301, Louisville, KY 40292, USA. parsian@louisville.edu

Genomics
|February 14, 2004
PubMed

Insights

Genetic variations in monoamine oxidases A and B (MAO-A and -B) genes are strongly associated with Parkinson

Area of Science:

  • Neurogenetics
  • Molecular Neurology
  • Biochemistry

Background:

  • Parkinson's disease (PD) is a neurodegenerative disorder primarily sporadic but with familial forms.
  • Monoamine oxidases A and B (MAO-A and -B) genes are implicated in neurotransmitter metabolism and are potential PD susceptibility candidates.
  • Previous studies on MAO-A and -B gene associations with PD have yielded inconclusive results.

Purpose of the Study:

  • To investigate the association of MAO-A and -B gene polymorphisms with Parkinson's disease.
  • To clarify the role of these genes in both familial and sporadic PD development.

Main Methods:

  • Screening of MAO-A and -B genes using dinucleotide repeat markers.
  • Analysis of 96 familial PD patients, 164 sporadic PD patients, and 180 healthy controls.
  • Statistical analysis including association testing and haplotype frequency comparison.

Main Results:

  • Strong significant association found between MAO-A and -B gene polymorphisms and total, familial, and sporadic PD (p < 0.00001).
  • No significant differences in age of onset were observed based on MAO-A and -B gene status.
  • Common haplotype frequencies of MAO-A and -B differed significantly between PD patients and controls (p = 0.02).

Conclusions:

  • MAO-A and -B genes likely play a role in susceptibility to Parkinson's disease.
  • The findings support MAO-A and -B as genetic factors contributing to PD risk.
  • Further research is warranted to elucidate the precise mechanisms.

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