A genetic polymorphism of MAO-B modifies the association of cigarette smoking and Parkinson's disease.

Checkoway, H; Franklin, G M; Costa-Mallen, P; Smith-Weller, T; Dilley, J; Swanson, P D; Costa, L G · Neurology · 1998

case_control · Level III

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Abstract

In a population-based case-control study, we found a reversal of the association of cigarette smoking with Parkinson's disease (PD) in relation to the monoamine oxidase B intron 13 genetic polymorphism. A reduced PD risk related to pack-years of smoking was detected for persons with the G allele, whereas an opposite effect was found among persons with the A allele. These results indicate an unexplained interaction between cigarette smoking and this genetic polymorphism.

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