Objective: To determine whether the alpha1-antichymotrypsin AA genotype (ACT-AA) confers susceptibility for developing Parkinson's disease (PD) in the Spanish population.
Background: A correlation between the ACT-AA genotype and the risk of developing PD has been recently reported in the Japanese population.
Methods: The ACT genotypes of 71 patients diagnosed with clinically definite PD were compared with those of 109 age-matched healthy control subjects.
Results: The authors found that the ACT-AA polymorphism frequency was not increased significantly in the PD group (31%) compared with the control group (28.4%). The ACT allelic distribution was also similar for familial and sporadic PD, for female and male patients, and for the different clinical subtypes of PD. The age at onset of PD was significantly lower in the ACT-AA patients compared with non-ACT-AA patients. When the actual age was considered, the ACT-AA frequency was higher in PD patients < or =50 years old (50%) compared with that present in patients >50 years old (26.8%), but the same effect was found in control subjects.
Conclusions: The ACT-AA polymorphism is not related to an increased risk of developing PD in the Spanish population. The ACT-AA overrepresentation in PD and control subjects < or =50 years old suggests that this polymorphism could be associated with life-threatening conditions other than PD.
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