A recent study showed modest evidence for an increased frequency of th
e bleomycin hydrolase (BH) VN genotype in Alzheimer's disease (AD) pat
ients compared with nondemented controls. To test this hypothesis, we
examined this polymorphism in 621 rigorously evaluated patients and 50
2 control subjects (all caucasian) but were unable to detect an associ
ation between BH and AD even after controlling for age, gender, and ap
olipoprotein E (ApoE) genotype. We conclude that this polymorphism doe
s not account for inherited susceptibility to AD in the populations re
presented in this sample.