Publications
214 results found
Tan ST, Scott W, Panoulas V, et al., 2014, Coronary heart disease in Indian Asians., Global Cardiology Science & Practice, Vol: 2014, Pages: 13-23, ISSN: 2305-7823
The Indian Asian population accounts for a fifth of all global deaths from coronary heart disease (CHD). CHD deaths on the Indian subcontinent have doubled since 1990, and are predicted to rise a further 50% by 2030. Reasons underlying the increased CHD mortality among Indian Asians remain unknown. Although conventional cardiovascular risk factors contribute to CHD in Indian Asians as in other populations, these do not account for their increased risk. Type-2 diabetes, insulin resistance and related metabolic disturbances are more prevalent amongst Indian Asians than Europeans, and have been proposed as major determinants of higher CHD risk among Indian Asians. However, this view is not supported by prospective data. Genome-wide association studies have not identified differences in allele frequencies or effect sizes in known loci to explain the increased CHD risk in Indian Asians. Limited knowledge of mechanisms underlying higher CHD risk amongst Indian Asians presents a major obstacle to reducing the burden of CHD in this population. Systems biology approaches such as genomics, epigenomics, metabolomics and transcriptomics, provide a non-biased approach for discovery of novel biomarkers and disease pathways underlying CHD. Incorporation of these 'omic' approaches in prospective Indian Asian cohorts such as the London Life Sciences Population Study (LOLIPOP) provide an exciting opportunity for the identification of new risk factors underlying CHD in this high risk population.
Al-Hussaini A, Kooner JS, John C, 2013, Novel Metabolic Biomarkers Predict Cardiovascular Mortality, Scientific Sessions and Resuscitation Science Symposium of the American-Heart-Association, Publisher: LIPPINCOTT WILLIAMS & WILKINS, ISSN: 0009-7322
Do R, Willer CJ, Schmidt EM, et al., 2013, Common variants associated with plasma triglycerides and risk for coronary artery disease, Nature Genetics, Vol: 45, Pages: 1345-1352, ISSN: 1061-4036
Triglycerides are transported in plasma by specific triglyceride-rich lipoproteins; in epidemiological studies, increased triglyceride levels correlate with higher risk for coronary artery disease (CAD). However, it is unclear whether this association reflects causal processes. We used 185 common variants recently mapped for plasma lipids (P < 5 × 10−8 for each) to examine the role of triglycerides in risk for CAD. First, we highlight loci associated with both low-density lipoprotein cholesterol (LDL-C) and triglyceride levels, and we show that the direction and magnitude of the associations with both traits are factors in determining CAD risk. Second, we consider loci with only a strong association with triglycerides and show that these loci are also associated with CAD. Finally, in a model accounting for effects on LDL-C and/or high-density lipoprotein cholesterol (HDL-C) levels, the strength of a polymorphism's effect on triglyceride levels is correlated with the magnitude of its effect on CAD risk. These results suggest that triglyceride-rich lipoproteins causally influence risk for CAD.
Willer CJ, Schmidt EM, Sengupta S, et al., 2013, Discovery and refinement of loci associated with lipid levels, Nature Genetics, Vol: 45, Pages: 1274-1283, ISSN: 1061-4036
Levels of low-density lipoprotein (LDL) cholesterol, high-density lipoprotein (HDL) cholesterol, triglycerides and total cholesterol are heritable, modifiable risk factors for coronary artery disease. To identify new loci and refine known loci influencing these lipids, we examined 188,577 individuals using genome-wide and custom genotyping arrays. We identify and annotate 157 loci associated with lipid levels at P < 5 × 10−8, including 62 loci not previously associated with lipid levels in humans. Using dense genotyping in individuals of European, East Asian, South Asian and African ancestry, we narrow association signals in 12 loci. We find that loci associated with blood lipid levels are often associated with cardiovascular and metabolic traits, including coronary artery disease, type 2 diabetes, blood pressure, waist-hip ratio and body mass index. Our results demonstrate the value of using genetic data from individuals of diverse ancestry and provide insights into the biological mechanisms regulating blood lipids to guide future genetic, biological and therapeutic research.
O'Seaghdha CM, Wu H, Yang Q, et al., 2013, Meta-analysis of genome-wide association studies identifies six new loci for serum calcium concentrations, PLoS Genetics, Vol: 9, Pages: 1-13, ISSN: 1553-7390
Calcium is vital to the normal functioning of multiple organ systems and its serum concentration is tightly regulated. Apart from CASR, the genes associated with serum calcium are largely unknown. We conducted a genome-wide association meta-analysis of 39,400 individuals from 17 population-based cohorts and investigated the 14 most strongly associated loci in ≤21,679 additional individuals. Seven loci (six new regions) in association with serum calcium were identified and replicated. Rs1570669 near CYP24A1 (P = 9.1E-12), rs10491003 upstream of GATA3 (P = 4.8E-09) and rs7481584 in CARS (P = 1.2E-10) implicate regions involved in Mendelian calcemic disorders: Rs1550532 in DGKD (P = 8.2E-11), also associated with bone density, and rs7336933 near DGKH/KIAA0564 (P = 9.1E-10) are near genes that encode distinct isoforms of diacylglycerol kinase. Rs780094 is in GCKR. We characterized the expression of these genes in gut, kidney, and bone, and demonstrate modulation of gene expression in bone in response to dietary calcium in mice. Our results shed new light on the genetics of calcium homeostasis.
Sabater-Lleal M, Huang J, Chasman D, et al., 2013, Multiethnic Meta-Analysis of Genome-Wide Association Studies in > 100 000 Subjects Identifies 23 FibrinogenAssociated Loci but No Strong Evidence of a Causal Association Between Circulating Fibrinogen and Cardiovascular Disease, CIRCULATION, Vol: 128, Pages: 1310-1324, ISSN: 0009-7322
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- Citations: 113
Wang X, Chua H-X, Chen P, et al., 2013, Comparing methods for performing trans-ethnic meta-analysis of genome-wide association studies, HUMAN MOLECULAR GENETICS, Vol: 22, Pages: 2303-2311, ISSN: 0964-6906
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- Citations: 52
den Hoed M, Eijgelsheim M, Esko T, et al., 2013, Identification of heart rate-associated loci and their effects on cardiac conduction and rhythm disorders, NATURE GENETICS, Vol: 45, Pages: 621-+, ISSN: 1061-4036
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- Citations: 228
Koettgen A, Albrecht E, Teumer A, et al., 2013, Genome-wide association analyses identify 18 new loci associated with serum urate concentrations, NATURE GENETICS, Vol: 45, Pages: 145-154, ISSN: 1061-4036
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- Citations: 561
Deloukas P, Kanoni S, Willenborg C, et al., 2013, Large-scale association analysis identifies new risk loci for coronary artery disease, NATURE GENETICS, Vol: 45, Pages: 25-U52, ISSN: 1061-4036
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- Citations: 959
van der Harst P, Zhang W, Leach IM, et al., 2012, Seventy-five genetic loci influencing the human red blood cell, NATURE, Vol: 492, Pages: 369-+, ISSN: 0028-0836
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- Citations: 242
Huang J, Sabater-Lleal M, Asselbergs FW, et al., 2012, Genome-wide association study for circulating levels of PAI-1 provides novel insights into its regulation, BLOOD, Vol: 120, Pages: 4873-4881, ISSN: 0006-4971
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- Citations: 72
Okada Y, Sim X, Go MJ, et al., 2012, Meta-analysis identifies multiple loci associated with kidney function-related traits in east Asian populations, NATURE GENETICS, Vol: 44, Pages: 904-+, ISSN: 1061-4036
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- Citations: 220
Sarwar N, Butterworth AS, Freitag DF, et al., 2012, Interleukin-6 receptor pathways in coronary heart disease: a collaborative meta-analysis of 82 studies, LANCET, Vol: 379, Pages: 1205-1213, ISSN: 0140-6736
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- Citations: 580
Dastani Z, Hivert M-F, Timpson N, et al., 2012, Novel Loci for Adiponectin Levels and Their Influence on Type 2 Diabetes and Metabolic Traits: A Multi-Ethnic Meta-Analysis of 45,891 Individuals, PLOS Genetics, Vol: 8, ISSN: 1553-7390
Circulating levels of adiponectin, a hormone produced predominantly by adipocytes, are highly heritable and are inverselyassociated with type 2 diabetes mellitus (T2D) and other metabolic traits. We conducted a meta-analysis of genome-wideassociation studies in 39,883 individuals of European ancestry to identify genes associated with metabolic disease. Weidentified 8 novel loci associated with adiponectin levels and confirmed 2 previously reported loci (P = 4.561028–1.2610243). Using a novel method to combine data across ethnicities (N = 4,232 African Americans, N = 1,776 Asians, andN = 29,347 Europeans), we identified two additional novel loci. Expression analyses of 436 human adipocyte samplesrevealed that mRNA levels of 18 genes at candidate regions were associated with adiponectin concentrations afteraccounting for multiple testing (p,361024). We next developed a multi-SNP genotypic risk score to test the associationof adiponectin decreasing risk alleles on metabolic traits and diseases using consortia-level meta-analytic data. This riskscore was associated with increased risk of T2D (p = 4.361023, n = 22,044), increased triglycerides (p = 2.6610214,n = 93,440), increased waist-to-hip ratio (p = 1.861025, n = 77,167), increased glucose two hours post oral glucosetolerance testing (p = 4.461023, n = 15,234), increased fasting insulin (p = 0.015, n = 48,238), but with lower in HDLcholesterolconcentrations (p = 4.5610213, n = 96,748) and decreased BMI (p = 1.461024, n = 121,335). These findingsidentify novel genetic determinants of adiponectin levels, which, taken together, influence risk of T2D and markers ofinsulin resistance.
Gieger C, Radhakrishnan A, Cvejic A, et al., 2011, New gene functions in megakaryopoiesis and platelet formation, NATURE, Vol: 480, Pages: 201-208, ISSN: 0028-0836
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- Citations: 310
Chambers JC, Zhang W, Sehmi J, et al., 2011, Genome-wide association study identifies loci influencing concentrations of liver enzymes in plasma, NATURE GENETICS, Vol: 43, Pages: 1131-1138, ISSN: 1061-4036
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- Citations: 409
Ehret GB, Munroe PB, Rice KM, et al., 2011, Genetic variants in novel pathways influence blood pressure and cardiovascular disease risk, NATURE, Vol: 478, Pages: 103-109, ISSN: 0028-0836
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- Citations: 1509
Kooner JS, Saleheen D, Sim X, et al., 2011, Genome-wide association study in individuals of South Asian ancestry identifies six new type 2 diabetes susceptibility loci, NATURE GENETICS, Vol: 43, Pages: 984-U94, ISSN: 1061-4036
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- Citations: 398
Wain LV, Verwoert GC, O'Reilly PF, et al., 2011, Genome-wide association study identifies six new loci influencing pulse pressure and mean arterial pressure, NATURE GENETICS, Vol: 43, Pages: 1005-U122, ISSN: 1061-4036
Numerous genetic loci have been associated with systolic blood pressure (SBP) and diastolic blood pressure (DBP) in Europeans1,2,3. We now report genome-wide association studies of pulse pressure (PP) and mean arterial pressure (MAP). In discovery (N = 74,064) and follow-up studies (N = 48,607), we identified at genome-wide significance (P = 2.7 × 10−8 to P = 2.3 × 10−13) four new PP loci (at 4q12 near CHIC2, 7q22.3 near PIK3CG, 8q24.12 in NOV and 11q24.3 near ADAMTS8), two new MAP loci (3p21.31 in MAP4 and 10q25.3 near ADRB1) and one locus associated with both of these traits (2q24.3 near FIGN) that has also recently been associated with SBP in east Asians. For three of the new PP loci, the estimated effect for SBP was opposite of that for DBP, in contrast to the majority of common SBP- and DBP-associated variants, which show concordant effects on both traits. These findings suggest new genetic pathways underlying blood pressure variation, some of which may differentially influence SBP and DBP.
Das D, Sehmi J, Ahmed N, et al., 2011, Comparison of known genetic variants to coronary heart disease risk between Indian Asians and Europeans, EUROPEAN HEART JOURNAL, Vol: 32, Pages: 652-652, ISSN: 0195-668X
Kilpelainen TO, Zillikens MC, Stancakova A, et al., 2011, Genetic variation near <i>IRS1</i> associates with reduced adiposity and an impaired metabolic profile, NATURE GENETICS, Vol: 43, Pages: 753-U58, ISSN: 1061-4036
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- Citations: 229
Sehmi J, Saleheen D, Yeo IY, et al., 2011, A genome-wide association study in Indian Asians identifies five novel genetic variants for type-2 diabetes, EUROPEAN HEART JOURNAL, Vol: 32, Pages: 357-357, ISSN: 0195-668X
Sehmi J, Yeo IY, Salaheen S, et al., 2011, Contribution of known genetic variants to increased risk of type-2 diabetes in Indian Asians, EUROPEAN HEART JOURNAL, Vol: 32, Pages: 673-673, ISSN: 0195-668X
Peden JF, Hopewell JC, Saleheen D, et al., 2011, A genome-wide association study in Europeans and South Asians identifies five new loci for coronary artery disease, NATURE GENETICS, Vol: 43, Pages: 339-U89, ISSN: 1061-4036
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- Citations: 532
Teslovich TM, Musunuru K, Smith AV, et al., 2010, Biological, clinical and population relevance of 95 loci for blood lipids, Nature, Vol: 466, Pages: 707-713, ISSN: 0028-0836
Plasma concentrations of total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol and triglycerides are among the most important risk factors for coronary artery disease (CAD) and are targets for therapeutic intervention. We screened the genome for common variants associated with plasma lipids in >100,000 individuals of European ancestry. Here we report 95 significantly associated loci (P < 5 × 10−8), with 59 showing genome-wide significant association with lipid traits for the first time. The newly reported associations include single nucleotide polymorphisms (SNPs) near known lipid regulators (for example, CYP7A1, NPC1L1 and SCARB1) as well as in scores of loci not previously implicated in lipoprotein metabolism. The 95 loci contribute not only to normal variation in lipid traits but also to extreme lipid phenotypes and have an impact on lipid traits in three non-European populations (East Asians, South Asians and African Americans). Our results identify several novel loci associated with plasma lipids that are also associated with CAD. Finally, we validated three of the novel genes—GALNT2, PPP1R3B and TTC39B—with experiments in mouse models. Taken together, our findings provide the foundation to develop a broader biological understanding of lipoprotein metabolism and to identify new therapeutic opportunities for the prevention of CAD.
Kapur K, Johnson T, Beckmann ND, et al., 2010, Genome-Wide Meta-Analysis for Serum Calcium Identifies Significantly Associated SNPs near the Calcium-Sensing Receptor (CASR) Gene, PLOS Genetics, Vol: 6, ISSN: 1553-7390
Calcium has a pivotal role in biological functions, and serum calcium levels have been associated with numerous disordersof bone and mineral metabolism, as well as with cardiovascular mortality. Here we report results from a genome-wideassociation study of serum calcium, integrating data from four independent cohorts including a total of 12,865 individualsof European and Indian Asian descent. Our meta-analysis shows that serum calcium is associated with SNPs in or near thecalcium-sensing receptor (CASR) gene on 3q13. The top hit with a p-value of 6.3610-37 is rs1801725, a missense variant,explaining 1.26% of the variance in serum calcium. This SNP had the strongest association in individuals of Europeandescent, while for individuals of Indian Asian descent the top hit was rs17251221 (p = 1.1610-21), a SNP in strong linkagedisequilibrium with rs1801725. The strongest locus in CASR was shown to replicate in an independent Icelandic cohort of4,126 individuals (p = 1.02610-4). This genome-wide meta-analysis shows that common CASR variants modulate serumcalcium levels in the adult general population, which confirms previous results in some candidate gene studies of the CASRlocus. This study highlights the key role of CASR in calcium regulation.
Gaemperli O, Liga R, Spyrou N, et al., 2010, Myocardial β-adrenoceptor down-regulation early after infarction is associated with long-term incidence of congestive heart failure, EUROPEAN HEART JOURNAL, Vol: 31, Pages: 1722-1729, ISSN: 0195-668X
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- Citations: 22
Chahal N, Lim TK, Melderis S, et al., 2010, INCREASED CAROTID ARTERY PLAQUE BURDEN IS ASSOCIATED WITH REDUCED SYSTOLIC LEFT VENTRICULAR FUNCTION AND INCREASED FILLING PRESSURE IN ASYMPTOMATIC INDIVIDUALS, Annual Conference and Exhibition of the British-Cardiovascular-Society, Publisher: B M J PUBLISHING GROUP, Pages: A65-A66, ISSN: 1355-6037
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- Citations: 1
Chambers JC, Zhang W, Lord GM, et al., 2010, Genetic loci influencing kidney function and chronic kidney disease, NATURE GENETICS, Vol: 42, Pages: 373-375, ISSN: 1061-4036
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- Citations: 215
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