Abstract
Objective To investigate the relationship between CYP19 gene polymorphism and Alzheimer disease. Methods Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was used to analyze the allele frequency distribution at the Mfe Ⅰ site of CYP19 gene in 102 patients with Alzheimer disease and 121 healthy control subjects. Results The frequencies of CYP19 ml and m2 alleles showed significant differences between the patient group and the control group (66.2% vs 81.0% and 33.8% vs 19.0%, respectively, X2=12.696, P<0.05). In patients with Alzheimer disease, the frequencies ofm1/m1, m1/m2, m2/m2 genotypes of CYP19 gene were 44.1%, 44.1%, and 11.8%, respectively, showing significant differences from the frequencies in the control subjects (65.3%, 31.4%, and 3.3%, respectively, X2=12.384, P<0.05). Conclusion CYP19 gene polymorphism at the Mfe Ⅰ site is associated with the genetic susceptibility to Alzheimer disease. Key words: Alzheimer's disease; CYP19; Gene polymorphism
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