title: Polymorphisms in folate metabolic genes and lung cancer risk in Xuan Wei, China.
abstract: The aim of this study is to investigate the role of genetic polymorphisms in twelve folate metabolism genes on the risk of lung cancer in Xuan Wei, China, where the lung cancer mortality rate is among the highest and is mainly caused by indoor smoky coal emissions. A total of 122 incident primary lung cancer cases and 122 matched controls were enrolled. Three single nucleotide polymorphisms were associated with increased risk of lung cancer including homozygotes of the C allele of CBS Ala360Ala (OR: 4.02; 95% CI: 1.64-9.87), the 222Val allele of MTHFR (OR: 2.32; 95% CI: 1.34-4.03), and the C allele of SLC19A1 Pro232Pro (OR: 1.83; 95% CI: 1.02-3.28). The distribution of CBS and MTHFR haplotypes differed between cases and controls (P=0.002 and P=0.07, respectively). In summary, three genetic variants in folate metabolism genes are associated with an increased risk of lung cancer in Xuan Wei, China.
authors.affiliation: Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, MSC 7240, 6120 Executive Blvd., Bethesda, MD 20892-7240, USA. shenmi@mail.nih.gov
authors.forename: Min
authors.initials: M
authors.lastname: Shen
authors.forename: Nathaniel
authors.initials: N
authors.lastname: Rothman
authors.forename: Sonja I
authors.initials: SI
authors.lastname: Berndt
authors.forename: Xingzhou
authors.initials: X
authors.lastname: He
authors.forename: Meredith
authors.initials: M
authors.lastname: Yeager
authors.forename: Robert
authors.initials: R
authors.lastname: Welch
authors.forename: Stephen
authors.initials: S
authors.lastname: Chanock
authors.forename: Neil
authors.initials: N
authors.lastname: Caporaso
authors.forename: Qing
authors.initials: Q
authors.lastname: Lan
mesh_terms: D000328:Adult; D000368:Aged; D000483:Alleles; D002681:China; D003541:Cystathionine beta-Synthase / Q000235:genetics*; D005260:Female; D005492:Folic Acid / Q000737:chemistry*; D015972:Gene Expression Regulation, Neoplastic; D020022:Genetic Predisposition to Disease; D014644:Genetic Variation; D006239:Haplotypes; D006720:Homozygote; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000235:genetics*; D008297:Male; D026901:Membrane Transport Proteins / Q000235:genetics*; D042965:Methylenetetrahydrofolate Reductase (NADPH2) / Q000235:genetics*; D008875:Middle Aged; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D020641:Polymorphism, Single Nucleotide; D058978:Reduced Folate Carrier Protein; D012306:Risk; D012907:Smoking
chemical_list: D026901:Membrane Transport Proteins; D058978:Reduced Folate Carrier Protein; C548699:SLC19A1 protein, human; D005492:Folic Acid; D042965:Methylenetetrahydrofolate Reductase (NADPH2); D003541:Cystathionine beta-Synthase