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Folate Network Genetic Variation, Plasma Homocysteine, And Global Genomic Methylation Content: A Genetic Association Study, Susan M. Wernimont, Andrew G. Clark, Patrick J. Stover, Martin T. Wells, Augusto A. Litonjua, Scott T. Weiss, J. Michael Gazianno, Katherine L. Tucker, Andrea Baccarelli, Joel Schwartz, Valentina Bollati, Patricia A. Cassano
Folate Network Genetic Variation, Plasma Homocysteine, And Global Genomic Methylation Content: A Genetic Association Study, Susan M. Wernimont, Andrew G. Clark, Patrick J. Stover, Martin T. Wells, Augusto A. Litonjua, Scott T. Weiss, J. Michael Gazianno, Katherine L. Tucker, Andrea Baccarelli, Joel Schwartz, Valentina Bollati, Patricia A. Cassano
Katherine L. Tucker
Background
Sequence variants in genes functioning in folate-mediated one-carbon metabolism are hypothesized to lead to changes in levels of homocysteine and DNA methylation, which, in turn, are associated with risk of cardiovascular disease.
Methods
330 SNPs in 52 genes were studied in relation to plasma homocysteine and global genomic DNA methylation. SNPs were selected based on functional effects and gene coverage, and assays were completed on the Illumina Goldengate platform. Age-, smoking-, and nutrient-adjusted genotype--phenotype associations were estimated in regression models.
Results
Using a nominal P ≤ 0.005 threshold for statistical significance, 20 SNPs were associated with plasma homocysteine, 8 …