title: Association between Alzheimer's disease and the NOS3 gene Glu298Asp polymorphism in Chinese.
abstract: The oxidative stress caused by nitric oxide (NO) in the brain has been proposed as a pathogenic mechanism in Alzheimer's disease. Endothelial NO synthase (ecNOS) produces the majority of circulating NO. The biological functional and genetic association studies suggested that the Glu298Asp polymorphism of the ecNOS gene (NOS3) may be a genetic risk factor for late-onset Alzheimer's disease (LOAD). To investigate an association between the NOS31 Glu298Asp polymorphism and sporadic LOAD in Chinese, we examined 338 LOAD patients and 378 healthy controls. The associations of the Glu/Glu genotype and Glu allele with LOAD (chi2 = 9.12, df = 1, P = 0.003 by genotype; chi2 = 8.37, df = 1, P = 0.038 by allele) were found. After stratifying by apolipoprotein E allele 4 (APOE epsilon 4) status, increased LOAD risks associated with the Glu/Glu genotype and Glu allele only in the APOE epsilon 4 noncarriers (chi2 = 6.28, df = 1, P = 0.012 by genotype; chi2 = 5.62, df = 1, P = 0.018 by allele) were seen. These results suggest that the NOS3 gene Glu298Asp polymorphism might be a risk factor for LOAD and dependent on APOE epsilon 4 status in Chinese.
authors.affiliation: Center for Genetics, National Research Institute for Family Planning, 12, Dahuisi Road, Haidian, Beijing 100081, China.
authors.forename: Binbin
authors.initials: B
authors.lastname: Wang
authors.forename: Sainan
authors.initials: S
authors.lastname: Tan
authors.forename: Ze
authors.initials: Z
authors.lastname: Yang
authors.forename: Yan-Chen
authors.initials: YC
authors.lastname: Xie
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: Sirui
authors.initials: S
authors.lastname: Zhou
authors.forename: Shu
authors.initials: S
authors.lastname: Li
authors.forename: Chenguang
authors.initials: C
authors.lastname: Zheng
authors.forename: Xu
authors.initials: X
authors.lastname: Ma
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000235:genetics*; D053327:Apolipoprotein E4 / Q000235:genetics; D044466:Asian People / Q000235:genetics; D001224:Aspartic Acid / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D018698:Glutamic Acid / Q000235:genetics*; D006801:Humans; D052250:Nitric Oxide Synthase Type III / Q000235:genetics*; D011110:Polymorphism, Genetic
chemical_list: D053327:Apolipoprotein E4; D001224:Aspartic Acid; D018698:Glutamic Acid; C496314:NOS3 protein, human; D052250:Nitric Oxide Synthase Type III