TY - JOUR T1 - DNA Methylation Analysis Identifies Loci for Blood Pressure Regulation. JF - Am J Hum Genet Y1 - 2017 A1 - Richard, Melissa A A1 - Huan, Tianxiao A1 - Ligthart, Symen A1 - Gondalia, Rahul A1 - Jhun, Min A A1 - Brody, Jennifer A A1 - Irvin, Marguerite R A1 - Marioni, Riccardo A1 - Shen, Jincheng A1 - Tsai, Pei-Chien A1 - Montasser, May E A1 - Jia, Yucheng A1 - Syme, Catriona A1 - Salfati, Elias L A1 - Boerwinkle, Eric A1 - Guan, Weihua A1 - Mosley, Thomas H A1 - Bressler, Jan A1 - Morrison, Alanna C A1 - Liu, Chunyu A1 - Mendelson, Michael M A1 - Uitterlinden, André G A1 - van Meurs, Joyce B A1 - Franco, Oscar H A1 - Zhang, Guosheng A1 - Li, Yun A1 - Stewart, James D A1 - Bis, Joshua C A1 - Psaty, Bruce M A1 - Chen, Yii-Der Ida A1 - Kardia, Sharon L R A1 - Zhao, Wei A1 - Turner, Stephen T A1 - Absher, Devin A1 - Aslibekyan, Stella A1 - Starr, John M A1 - McRae, Allan F A1 - Hou, Lifang A1 - Just, Allan C A1 - Schwartz, Joel D A1 - Vokonas, Pantel S A1 - Menni, Cristina A1 - Spector, Tim D A1 - Shuldiner, Alan A1 - Damcott, Coleen M A1 - Rotter, Jerome I A1 - Palmas, Walter A1 - Liu, Yongmei A1 - Paus, Tomáš A1 - Horvath, Steve A1 - O'Connell, Jeffrey R A1 - Guo, Xiuqing A1 - Pausova, Zdenka A1 - Assimes, Themistocles L A1 - Sotoodehnia, Nona A1 - Smith, Jennifer A A1 - Arnett, Donna K A1 - Deary, Ian J A1 - Baccarelli, Andrea A A1 - Bell, Jordana T A1 - Whitsel, Eric A1 - Dehghan, Abbas A1 - Levy, Daniel A1 - Fornage, Myriam KW - Aged KW - Blood Pressure KW - CpG Islands KW - Cross-Sectional Studies KW - DNA Methylation KW - Epigenesis, Genetic KW - Genetic Variation KW - Genome-Wide Association Study KW - Humans KW - Mendelian Randomization Analysis KW - Middle Aged KW - Nerve Tissue Proteins KW - Quantitative Trait Loci KW - Tetraspanins AB -

Genome-wide association studies have identified hundreds of genetic variants associated with blood pressure (BP), but sequence variation accounts for a small fraction of the phenotypic variance. Epigenetic changes may alter the expression of genes involved in BP regulation and explain part of the missing heritability. We therefore conducted a two-stage meta-analysis of the cross-sectional associations of systolic and diastolic BP with blood-derived genome-wide DNA methylation measured on the Infinium HumanMethylation450 BeadChip in 17,010 individuals of European, African American, and Hispanic ancestry. Of 31 discovery-stage cytosine-phosphate-guanine (CpG) dinucleotides, 13 replicated after Bonferroni correction (discovery: N = 9,828, p < 1.0 × 10-7; replication: N = 7,182, p < 1.6 × 10-3). The replicated methylation sites are heritable (h2 > 30%) and independent of known BP genetic variants, explaining an additional 1.4% and 2.0% of the interindividual variation in systolic and diastolic BP, respectively. Bidirectional Mendelian randomization among up to 4,513 individuals of European ancestry from 4 cohorts suggested that methylation at cg08035323 (TAF1B-YWHAQ) influences BP, while BP influences methylation at cg00533891 (ZMIZ1), cg00574958 (CPT1A), and cg02711608 (SLC1A5). Gene expression analyses further identified six genes (TSPAN2, SLC7A11, UNC93B1, CPT1A, PTMS, and LPCAT3) with evidence of triangular associations between methylation, gene expression, and BP. Additional integrative Mendelian randomization analyses of gene expression and DNA methylation suggested that the expression of TSPAN2 is a putative mediator of association between DNA methylation at cg23999170 and BP. These findings suggest that heritable DNA methylation plays a role in regulating BP independently of previously known genetic variants.

VL - 101 IS - 6 ER -