title: Association of NAD(P)H:quinone oxidoreductase 1 polymorphism and Alzheimer's disease in Chinese.
abstract: Several lines of evidence support a role of oxidative stress in the pathology of Alzheimer's disease (AD). NAD(P)H:quinone oxidoreductase 1 (NQO1) catalyzes the two-electron reduction of quinones, preventing their participation in redox cycling and subsequent generation of reactive oxygen species. We examined association between the NQO1 C609T gene polymorphism and sporadic AD in a Chinese population comprising 311 AD patients and 330 controls. Our results showed a higher T-allele frequency in the AD cases compared with the controls. The difference was close to but did not reach statistically significant level [p = 0.059; odds ratio (OR) T versus C = 1.236; 95% confidence interval (95% CI), 0.992-1.540]. A significantly low C/C genotype frequency in the AD cases compared with the controls was detected (p = 0.025; OR C/C versus C/T + T/T = 0.674; 95% CI, 1.049-2.098) and APOE epsilon4 status analysis revealed significant difference in the APOE epsilon4 non-carriers (p = 0.036; OR = 0.633; 95% CI, 1.027-2.427). In the > or =65 years samples, significantly low C/C frequency in the AD cases in comparison with the controls was observed in the APOE epsilon4 non-carriers (p = 0.045; OR = 0.595; 95% CI, 1.010-2.794). These results indicated that the C/C genotype had a possible protective effect against AD development, and the T allele might be a weak risk factor for late onset AD.
authors.affiliation: Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Beijing, People's Republic of China.
authors.forename: Jian-Tao
authors.initials: JT
authors.lastname: Bian
authors.forename: Hua-Lu
authors.initials: HL
authors.lastname: Zhao
authors.forename: Zhen-Xin
authors.initials: ZX
authors.lastname: Zhang
authors.forename: Xiu-Hua
authors.initials: XH
authors.lastname: Bi
authors.forename: Jun-Wu
authors.initials: JW
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000201:enzymology* / Q000453:epidemiology / Q000235:genetics*; D053327:Apolipoprotein E4 / Q000235:genetics; D044466:Asian People / Q000235:genetics; D001921:Brain / Q000201:enzymology* / Q000503:physiopathology; D001923:Brain Chemistry / Q000235:genetics*; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D019610:Cytoprotection / Q000235:genetics; D004252:DNA Mutational Analysis; D005260:Female; D005787:Gene Frequency; D005819:Genetic Markers / Q000235:genetics; D020022:Genetic Predisposition to Disease / Q000453:epidemiology / Q000235:genetics; D005820:Genetic Testing; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D016660:NAD(P)H Dehydrogenase (Quinone) / Q000235:genetics*; D018384:Oxidative Stress / Q000235:genetics; D011110:Polymorphism, Genetic / Q000235:genetics*
chemical_list: D053327:Apolipoprotein E4; D005819:Genetic Markers; D016660:NAD(P)H Dehydrogenase (Quinone); C447479:NQO1 protein, human