TY - JOUR T1 - Interaction of methylation-related genetic variants with circulating fatty acids on plasma lipids: a meta-analysis of 7 studies and methylation analysis of 3 studies in the Cohorts for Heart and Aging Research in Genomic Epidemiology consortium. JF - Am J Clin Nutr Y1 - 2016 A1 - Ma, Yiyi A1 - Follis, Jack L A1 - Smith, Caren E A1 - Tanaka, Toshiko A1 - Manichaikul, Ani W A1 - Chu, Audrey Y A1 - Samieri, Cecilia A1 - Zhou, Xia A1 - Guan, Weihua A1 - Wang, Lu A1 - Biggs, Mary L A1 - Chen, Yii-der I A1 - Hernandez, Dena G A1 - Borecki, Ingrid A1 - Chasman, Daniel I A1 - Rich, Stephen S A1 - Ferrucci, Luigi A1 - Irvin, Marguerite Ryan A1 - Aslibekyan, Stella A1 - Zhi, Degui A1 - Tiwari, Hemant K A1 - Claas, Steven A A1 - Sha, Jin A1 - Kabagambe, Edmond K A1 - Lai, Chao-Qiang A1 - Parnell, Laurence D A1 - Lee, Yu-Chi A1 - Amouyel, Philippe A1 - Lambert, Jean-Charles A1 - Psaty, Bruce M A1 - King, Irena B A1 - Mozaffarian, Dariush A1 - McKnight, Barbara A1 - Bandinelli, Stefania A1 - Tsai, Michael Y A1 - Ridker, Paul M A1 - Ding, Jingzhong A1 - Mstat, Kurt Lohmant A1 - Liu, Yongmei A1 - Sotoodehnia, Nona A1 - Barberger-Gateau, Pascale A1 - Steffen, Lyn M A1 - Siscovick, David S A1 - Absher, Devin A1 - Arnett, Donna K A1 - Ordovas, Jose M A1 - Lemaitre, Rozenn N KW - Apolipoproteins E KW - ATP Binding Cassette Transporter 1 KW - Cholesterol, HDL KW - Cohort Studies KW - Diet KW - DNA Methylation KW - Eicosapentaenoic Acid KW - Epigenesis, Genetic KW - Fatty Acids KW - Gene Expression Regulation KW - Humans KW - Lipids KW - Polymorphism, Single Nucleotide KW - Promoter Regions, Genetic KW - Triglycerides AB -

BACKGROUND: DNA methylation is influenced by diet and single nucleotide polymorphisms (SNPs), and methylation modulates gene expression.

OBJECTIVE: We aimed to explore whether the gene-by-diet interactions on blood lipids act through DNA methylation.

DESIGN: We selected 7 SNPs on the basis of predicted relations in fatty acids, methylation, and lipids. We conducted a meta-analysis and a methylation and mediation analysis with the use of data from the CHARGE (Cohorts for Heart and Aging Research in Genomic Epidemiology) consortium and the ENCODE (Encyclopedia of DNA Elements) consortium.

RESULTS: On the basis of the meta-analysis of 7 cohorts in the CHARGE consortium, higher plasma HDL cholesterol was associated with fewer C alleles at ATP-binding cassette subfamily A member 1 (ABCA1) rs2246293 (β = -0.6 mg/dL, P = 0.015) and higher circulating eicosapentaenoic acid (EPA) (β = 3.87 mg/dL, P = 5.62 × 10(21)). The difference in HDL cholesterol associated with higher circulating EPA was dependent on genotypes at rs2246293, and it was greater for each additional C allele (β = 1.69 mg/dL, P = 0.006). In the GOLDN (Genetics of Lipid Lowering Drugs and Diet Network) study, higher ABCA1 promoter cg14019050 methylation was associated with more C alleles at rs2246293 (β = 8.84%, P = 3.51 × 10(18)) and lower circulating EPA (β = -1.46%, P = 0.009), and the mean difference in methylation of cg14019050 that was associated with higher EPA was smaller with each additional C allele of rs2246293 (β = -2.83%, P = 0.007). Higher ABCA1 cg14019050 methylation was correlated with lower ABCA1 expression (r = -0.61, P = 0.009) in the ENCODE consortium and lower plasma HDL cholesterol in the GOLDN study (r = -0.12, P = 0.0002). An additional mediation analysis was meta-analyzed across the GOLDN study, Cardiovascular Health Study, and the Multi-Ethnic Study of Atherosclerosis. Compared with the model without the adjustment of cg14019050 methylation, the model with such adjustment provided smaller estimates of the mean plasma HDL cholesterol concentration in association with both the rs2246293 C allele and EPA and a smaller difference by rs2246293 genotypes in the EPA-associated HDL cholesterol. However, the differences between 2 nested models were NS (P > 0.05).

CONCLUSION: We obtained little evidence that the gene-by-fatty acid interactions on blood lipids act through DNA methylation.

VL - 103 IS - 2 U1 - http://www.ncbi.nlm.nih.gov/pubmed/26791180?dopt=Abstract ER - TY - JOUR T1 - Meta-analysis across Cohorts for Heart and Aging Research in Genomic Epidemiology (CHARGE) consortium provides evidence for an association of serum vitamin D with pulmonary function. JF - Br J Nutr Y1 - 2018 A1 - Xu, Jiayi A1 - Bartz, Traci M A1 - Chittoor, Geetha A1 - Eiriksdottir, Gudny A1 - Manichaikul, Ani W A1 - Sun, Fangui A1 - Terzikhan, Natalie A1 - Zhou, Xia A1 - Booth, Sarah L A1 - Brusselle, Guy G A1 - de Boer, Ian H A1 - Fornage, Myriam A1 - Frazier-Wood, Alexis C A1 - Graff, Mariaelisa A1 - Gudnason, Vilmundur A1 - Harris, Tamara B A1 - Hofman, Albert A1 - Hou, Ruixue A1 - Houston, Denise K A1 - Jacobs, David R A1 - Kritchevsky, Stephen B A1 - Latourelle, Jeanne A1 - Lemaitre, Rozenn N A1 - Lutsey, Pamela L A1 - O'Connor, George A1 - Oelsner, Elizabeth C A1 - Pankow, James S A1 - Psaty, Bruce M A1 - Rohde, Rebecca R A1 - Rich, Stephen S A1 - Rotter, Jerome I A1 - Smith, Lewis J A1 - Stricker, Bruno H A1 - Voruganti, V Saroja A1 - Wang, Thomas J A1 - Zillikens, M Carola A1 - Barr, R Graham A1 - Dupuis, Josée A1 - Gharib, Sina A A1 - Lahousse, Lies A1 - London, Stephanie J A1 - North, Kari E A1 - Smith, Albert V A1 - Steffen, Lyn M A1 - Hancock, Dana B A1 - Cassano, Patricia A AB -

The role that vitamin D plays in pulmonary function remains uncertain. Epidemiological studies reported mixed findings for serum 25-hydroxyvitamin D (25(OH)D)-pulmonary function association. We conducted the largest cross-sectional meta-analysis of the 25(OH)D-pulmonary function association to date, based on nine European ancestry (EA) cohorts (n 22 838) and five African ancestry (AA) cohorts (n 4290) in the Cohorts for Heart and Aging Research in Genomic Epidemiology Consortium. Data were analysed using linear models by cohort and ancestry. Effect modification by smoking status (current/former/never) was tested. Results were combined using fixed-effects meta-analysis. Mean serum 25(OH)D was 68 (sd 29) nmol/l for EA and 49 (sd 21) nmol/l for AA. For each 1 nmol/l higher 25(OH)D, forced expiratory volume in the 1st second (FEV1) was higher by 1·1 ml in EA (95 % CI 0·9, 1·3; P<0·0001) and 1·8 ml (95 % CI 1·1, 2·5; P<0·0001) in AA (P race difference=0·06), and forced vital capacity (FVC) was higher by 1·3 ml in EA (95 % CI 1·0, 1·6; P<0·0001) and 1·5 ml (95 % CI 0·8, 2·3; P=0·0001) in AA (P race difference=0·56). Among EA, the 25(OH)D-FVC association was stronger in smokers: per 1 nmol/l higher 25(OH)D, FVC was higher by 1·7 ml (95 % CI 1·1, 2·3) for current smokers and 1·7 ml (95 % CI 1·2, 2·1) for former smokers, compared with 0·8 ml (95 % CI 0·4, 1·2) for never smokers. In summary, the 25(OH)D associations with FEV1 and FVC were positive in both ancestries. In EA, a stronger association was observed for smokers compared with never smokers, which supports the importance of vitamin D in vulnerable populations.

ER - TY - JOUR T1 - Omega-3 Fatty Acids and Genome-wide Interaction Analyses Reveal DPP10-Pulmonary Function Association. JF - Am J Respir Crit Care Med Y1 - 2018 A1 - Xu, Jiayi A1 - Gaddis, Nathan C A1 - Bartz, Traci M A1 - Hou, Ruixue A1 - Manichaikul, Ani W A1 - Pankratz, Nathan A1 - Smith, Albert V A1 - Sun, Fangui A1 - Terzikhan, Natalie A1 - Markunas, Christina A A1 - Patchen, Bonnie K A1 - Schu, Matthew A1 - Beydoun, May A A1 - Brusselle, Guy G A1 - Eiriksdottir, Gudny A1 - Zhou, Xia A1 - Wood, Alexis C A1 - Graff, Mariaelisa A1 - Harris, Tamara B A1 - Ikram, M Arfan A1 - Jacobs, David R A1 - Launer, Lenore J A1 - Lemaitre, Rozenn N A1 - O'Connor, George A1 - Oelsner, Elizabeth C A1 - Psaty, Bruce M A1 - Ramachandran, Vasan S A1 - Rohde, Rebecca R A1 - Rich, Stephen S A1 - Rotter, Jerome I A1 - Seshadri, Sudha A1 - Smith, Lewis J A1 - Tiemeier, Henning A1 - Tsai, Michael Y A1 - Uitterlinden, André G A1 - Voruganti, V Saroja A1 - Xu, Hanfei A1 - Zilhão, Nuno R A1 - Fornage, Myriam A1 - Zillikens, M Carola A1 - London, Stephanie J A1 - Barr, R Graham A1 - Dupuis, Josée A1 - Gharib, Sina A A1 - Gudnason, Vilmundur A1 - Lahousse, Lies A1 - North, Kari E A1 - Steffen, Lyn M A1 - Cassano, Patricia A A1 - Hancock, Dana B AB -

RATIONALE: Omega-3 poly-unsaturated fatty acids (n-3 PUFAs) have anti-inflammatory properties that could benefit adults with comprised pulmonary health.

OBJECTIVE: To investigate n-3 PUFA associations with spirometric measures of pulmonary function tests (PFTs) and determine underlying genetic susceptibility.

METHODS: Associations of n-3 PUFA biomarkers (alpha-linolenic acid, eicosapentaenoic acid, docosapentaenoic acid [DPA], and docosahexaenoic acid [DHA]) were evaluated with PFTs (forced expiratory volume in the first second [FEV], forced vital capacity [FVC], and [FEV/FVC]) in meta-analyses across seven cohorts from the Cohorts for Heart and Aging Research in Genomic Epidemiology Consortium (N=16,134 of European or African ancestry). PFT-associated n-3 PUFAs were carried forward to genome-wide interaction analyses in the four largest cohorts (N=11,962) and replicated in one cohort (N=1,687). Cohort-specific results were combined using joint 2 degree-of-freedom (2df) meta-analyses of single nucleotide polymorphism (SNP) associations and their interactions with n-3 PUFAs.

RESULTS: DPA and DHA were positively associated with FEV1 and FVC (P<0.025), with evidence for effect modification by smoking and by sex. Genome-wide analyses identified a novel association of rs11693320-an intronic DPP10 SNP-with FVC when incorporating an interaction with DHA, and the finding was replicated (P=9.4×10 across discovery and replication cohorts). The rs11693320-A allele (frequency~80%) was associated with lower FVC (P=2.1×10; β= -161.0mL), and the association was attenuated by higher DHA levels (P=2.1×10; β=36.2mL).

CONCLUSIONS: We corroborated beneficial effects of n-3 PUFAs on pulmonary function. By modeling genome-wide n-3 PUFA interactions, we identified a novel DPP10 SNP association with FVC that was not detectable in much larger studies ignoring this interaction.

ER - TY - JOUR T1 - Biomarkers of Dietary Omega-6 Fatty Acids and Incident Cardiovascular Disease and Mortality. JF - Circulation Y1 - 2019 A1 - Marklund, Matti A1 - Wu, Jason H Y A1 - Imamura, Fumiaki A1 - Del Gobbo, Liana C A1 - Fretts, Amanda A1 - de Goede, Janette A1 - Shi, Peilin A1 - Tintle, Nathan A1 - Wennberg, Maria A1 - Aslibekyan, Stella A1 - Chen, Tzu-An A1 - de Oliveira Otto, Marcia C A1 - Hirakawa, Yoichiro A1 - Eriksen, Helle Højmark A1 - Kröger, Janine A1 - Laguzzi, Federica A1 - Lankinen, Maria A1 - Murphy, Rachel A A1 - Prem, Kiesha A1 - Samieri, Cecilia A1 - Virtanen, Jyrki A1 - Wood, Alexis C A1 - Wong, Kerry A1 - Yang, Wei-Sin A1 - Zhou, Xia A1 - Baylin, Ana A1 - Boer, Jolanda M A A1 - Brouwer, Ingeborg A A1 - Campos, Hannia A1 - Chaves, Paulo H M A1 - Chien, Kuo-Liong A1 - de Faire, Ulf A1 - Djoussé, Luc A1 - Eiriksdottir, Gudny A1 - El-Abbadi, Naglaa A1 - Forouhi, Nita G A1 - Michael Gaziano, J A1 - Geleijnse, Johanna M A1 - Gigante, Bruna A1 - Giles, Graham A1 - Guallar, Eliseo A1 - Gudnason, Vilmundur A1 - Harris, Tamara A1 - Harris, William S A1 - Helmer, Catherine A1 - Hellenius, Mai-Lis A1 - Hodge, Allison A1 - Hu, Frank B A1 - Jacques, Paul F A1 - Jansson, Jan-Håkan A1 - Kalsbeek, Anya A1 - Khaw, Kay-Tee A1 - Koh, Woon-Puay A1 - Laakso, Markku A1 - Leander, Karin A1 - Lin, Hung-Ju A1 - Lind, Lars A1 - Luben, Robert A1 - Luo, Juhua A1 - McKnight, Barbara A1 - Mursu, Jaakko A1 - Ninomiya, Toshiharu A1 - Overvad, Kim A1 - Psaty, Bruce M A1 - Rimm, Eric A1 - Schulze, Matthias B A1 - Siscovick, David A1 - Skjelbo Nielsen, Michael A1 - Smith, Albert V A1 - Steffen, Brian T A1 - Steffen, Lyn A1 - Sun, Qi A1 - Sundström, Johan A1 - Tsai, Michael Y A1 - Tunstall-Pedoe, Hugh A1 - Uusitupa, Matti I J A1 - van Dam, Rob M A1 - Veenstra, Jenna A1 - Monique Verschuren, W M A1 - Wareham, Nick A1 - Willett, Walter A1 - Woodward, Mark A1 - Yuan, Jian-Min A1 - Micha, Renata A1 - Lemaitre, Rozenn N A1 - Mozaffarian, Dariush A1 - Riserus, Ulf AB -

BACKGROUND: Global dietary recommendations for and cardiovascular effects of linoleic acid, the major dietary omega-6 fatty acid, and its major metabolite, arachidonic acid, remain controversial. To address this uncertainty and inform international recommendations, we evaluated how in vivo circulating and tissue levels of linoleic acid (LA) and arachidonic acid (AA) relate to incident cardiovascular disease (CVD) across multiple international studies.

METHODS: We performed harmonized, de novo, individual-level analyses in a global consortium of 30 prospective observational studies from 13 countries. Multivariable-adjusted associations of circulating and adipose tissue LA and AA biomarkers with incident total CVD and subtypes (coronary heart disease, ischemic stroke, cardiovascular mortality) were investigated according to a prespecified analytic plan. Levels of LA and AA, measured as the percentage of total fatty acids, were evaluated linearly according to their interquintile range (ie, the range between the midpoint of the first and fifth quintiles), and categorically by quintiles. Study-specific results were pooled using inverse-variance-weighted meta-analysis. Heterogeneity was explored by age, sex, race, diabetes mellitus, statin use, aspirin use, omega-3 levels, and fatty acid desaturase 1 genotype (when available).

RESULTS: In 30 prospective studies with medians of follow-up ranging 2.5 to 31.9 years, 15 198 incident cardiovascular events occurred among 68 659 participants. Higher levels of LA were significantly associated with lower risks of total CVD, cardiovascular mortality, and ischemic stroke, with hazard ratios per interquintile range of 0.93 (95% CI, 0.88-0.99), 0.78 (0.70-0.85), and 0.88 (0.79-0.98), respectively, and nonsignificantly with lower coronary heart disease risk (0.94; 0.88-1.00). Relationships were similar for LA evaluated across quintiles. AA levels were not associated with higher risk of cardiovascular outcomes; in a comparison of extreme quintiles, higher levels were associated with lower risk of total CVD (0.92; 0.86-0.99). No consistent heterogeneity by population subgroups was identified in the observed relationships.

CONCLUSIONS: In pooled global analyses, higher in vivo circulating and tissue levels of LA and possibly AA were associated with lower risk of major cardiovascular events. These results support a favorable role for LA in CVD prevention.

VL - 139 IS - 21 ER - TY - JOUR T1 - Egg consumption, overall diet quality, and risk of type 2 diabetes and coronary heart disease: A pooling project of US prospective cohorts. JF - Clin Nutr Y1 - 2021 A1 - Djoussé, Luc A1 - Zhou, Guohai A1 - McClelland, Robyn L A1 - Ma, Nanxun A1 - Zhou, Xia A1 - Kabagambe, Edmond K A1 - Talegawkar, Sameera A A1 - Judd, Suzanne E A1 - Biggs, Mary L A1 - Fitzpatrick, Annette L A1 - Clark, Cheryl R A1 - Gagnon, David R A1 - Steffen, Lyn M A1 - Gaziano, J Michael A1 - Lee, I-Min A1 - Buring, Julie E A1 - Manson, JoAnn E KW - Adult KW - Aged KW - Cohort Studies KW - Coronary Disease KW - Diabetes Mellitus, Type 2 KW - Diet KW - Eggs KW - Humans KW - Middle Aged KW - Prospective Studies KW - Risk Factors KW - United States AB -

BACKGROUND AND AIMS: Data on the relation of egg consumption with risk of type 2 diabetes (T2D) and coronary heart disease (CHD) are limited and inconsistent. Few studies have controlled for overall dietary patterns in egg-T2D or egg-CHD analyses, and it is unclear whether any observed elevated risks of T2D and CHD with frequent egg consumption is real or due to confounding by dietary habits. We tested the hypothesis that frequent egg consumption is associated with a higher risk of T2D and CHD risk after adjustment for overall dietary patterns among adults.

DESIGN: We used prospective cohort design to complete time-to-event analyses.

METHODS: We pooled de novo, harmonized, individual-level analyses from nine US cohorts (n = 103,811). Cox regression was used to estimate hazard ratios separately in each cohort adjusting for age, ethnicity, body mass index (BMI), exercise, smoking, alcohol intake, and dietary patterns. We pooled cohort-specific results using an inverse-variance weighted method to estimate summary relative risks.

RESULTS: Median age ranged from 25 to 72 years. Median egg consumption was 1 egg per week in most of the cohorts. While egg consumption up to one per week was not associated with T2D risk, consumption of ≥2 eggs per week was associated with elevated risk [27% elevated risk of T2D comparing 7+ eggs/week with none (95% CI: 16%-37%)]. There was little evidence for heterogeneity across cohorts and we observed similar conclusions when stratified by BMI. Overall, egg consumption was not associated with the risk of CHD. However, in a sensitivity analysis, there was a 30% higher risk of CHD (95% CI: 3%-56%) restricted to older adults consuming 5-6 eggs/week.

CONCLUSIONS: Our data showed an elevated risk of T2D with egg consumption of ≥2 eggs per week but not with <2 eggs/week. While there was no overall association of egg consumption with CHD risk, the elevated CHD observed with consumption of 5-6 eggs/week in older cohorts merits further investigation.

VL - 40 IS - 5 ER -