Monoamine oxidase B gene and Cytochrome P450 2D6 gene polymorphism in sporadic Korean Parkinson's disease
Journal of the Korean Neurological Association
;
: 63-71, 1999.
Article
in Korean
| WPRIM
| ID: wpr-163881
ABSTRACT
BACKGROUND:
Epidemiological studies have identified that positive family history and frequent exposures to environmental toxins such as 1-methyl-4-phenyl-1,2,3,6- tetrahydropyridine (MPTP) are of prime causative factors for PD. These toxins are mainly metabolized by MAO-B and CYP2D6. Thus, an individual with inherited defect in xenobiotic metabolism could have a higher susceptibility to PD. We performed this study to investigate a possible allelic association of MAO-B and CYP2D6 known to be involved in metabolism of dopamine and other drugs such as debrisoquine in PD.METHODS:
We studied polymorphism of MAO-B and CYP2D6 genes in 69 sporadic idiopathic PD patients (31 males and 38 females) and 41 age-matched healthy control (20 males and 21 females) using genomic DNA extracted from peripheral blood white cell with polymerase chain reaction (PCR) amplification and restriction fragment length polymorphism (RFLP).RESULTS:
There were eight different alleles of various numbers of GT repeats within the second intron of MAO-B. The frequency of (GT)20 allele was the highest (44.7%) in PD, while the frequencies of (GT)14 allele and (GT)19 allele were the highest in control groups. Furthermore, the odds ratios of (GT)16 allele and (GT)20 allele were 4.93 (95% confidence interval 0.6-107.63) and 6.15 (95% confidence interval; 2.52-15.51), respectively, suggesting a higher susceptibility to PD in (GT)20 allelic group (p<0.001). Polymorphism of CYP2D6 was also examined by PCR amplification followed by digestion with restriction enzymes. However, we were unable to identify G to A substitution at the junction of intron 3 and exon 4 nor base pair deletion in exon 5 from PD and control groups, which have been reported previously.CONCLUSIONS:
These results suggest that the MAO-B gene polymorphism could serve as a determinant of genetic susceptibility to PD at least in Korean population. But the susceptibility may not be directly associated with polymorphism of CYP2D gene examined in this study.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Parkinson Disease
/
Polymorphism, Restriction Fragment Length
/
DNA
/
Introns
/
Dopamine
/
Epidemiologic Studies
/
Odds Ratio
/
Polymerase Chain Reaction
/
Exons
/
Cytochrome P-450 CYP2D6
Type of study:
Etiology study
/
Observational study
/
Prognostic study
Limits:
Humans
/
Male
Language:
Korean
Journal:
Journal of the Korean Neurological Association
Year:
1999
Type:
Article
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