@article {1117, title = {Genome-wide association studies of cardiovascular risk factors: design, conduct and interpretation.}, journal = {J Thromb Haemost}, volume = {7 Suppl 1}, year = {2009}, month = {2009 Jul}, pages = {308-11}, abstract = {

Relying on known biology, candidate-gene studies have been only modestly successful in identifying genetic variants associated with cardiovascular risk factors. Genome-wide association (GWA) studies, in contrast, allow broad scans across millions of loci in search of unsuspected genetic associations with phenotypes. The large numbers of statistical tests in GWA studies and the large sample sizes required to detect modest-sized associations have served as a powerful incentive for the development of large collaborative efforts such as the Cohorts for Heart and Aging Research in Genomic Epidemiology (CHARGE) Consortium. This article uses published data on three phenotypes, fibrinogen, uric acid, and electrocardiographic QT interval duration, from the CHARGE Consortium to describe several methodologic issues in the design, conduct, and interpretation of GWA studies, including the use of imputation and the need for additional genotyping. Even with large studies, novel genetic loci explain only a small proportion of the variance of cardiovascular phenotypes.

}, keywords = {Cardiovascular Diseases, Genetic Predisposition to Disease, Genome-Wide Association Study, Humans, Quantitative Trait Loci, Risk Factors}, issn = {1538-7836}, doi = {10.1111/j.1538-7836.2009.03392.x}, author = {Bis, J C and Glazer, N L and Psaty, B M} } @article {6156, title = {Meta-analysis of 74,046 individuals identifies 11 new susceptibility loci for Alzheimer{\textquoteright}s disease.}, journal = {Nat Genet}, volume = {45}, year = {2013}, month = {2013 Dec}, pages = {1452-8}, abstract = {

Eleven susceptibility loci for late-onset Alzheimer{\textquoteright}s disease (LOAD) were identified by previous studies; however, a large portion of the genetic risk for this disease remains unexplained. We conducted a large, two-stage meta-analysis of genome-wide association studies (GWAS) in individuals of European ancestry. In stage 1, we used genotyped and imputed data (7,055,881 SNPs) to perform meta-analysis on 4 previously published GWAS data sets consisting of 17,008 Alzheimer{\textquoteright}s disease cases and 37,154 controls. In stage 2, 11,632 SNPs were genotyped and tested for association in an independent set of 8,572 Alzheimer{\textquoteright}s disease cases and 11,312 controls. In addition to the APOE locus (encoding apolipoprotein E), 19 loci reached genome-wide significance (P < 5 {\texttimes} 10(-8)) in the combined stage 1 and stage 2 analysis, of which 11 are newly associated with Alzheimer{\textquoteright}s disease.

}, keywords = {Age of Onset, Aged, Aged, 80 and over, Alzheimer Disease, Case-Control Studies, Cohort Studies, Female, Genetic Loci, Genetic Predisposition to Disease, Genome-Wide Association Study, Humans, Male, Middle Aged, Polymorphism, Single Nucleotide}, issn = {1546-1718}, doi = {10.1038/ng.2802}, author = {Lambert, J C and Ibrahim-Verbaas, C A and Harold, D and Naj, A C and Sims, R and Bellenguez, C and DeStafano, A L and Bis, J C and Beecham, G W and Grenier-Boley, B and Russo, G and Thorton-Wells, T A and Jones, N and Smith, A V and Chouraki, V and Thomas, C and Ikram, M A and Zelenika, D and Vardarajan, B N and Kamatani, Y and Lin, C F and Gerrish, A and Schmidt, H and Kunkle, B and Dunstan, M L and Ruiz, A and Bihoreau, M T and Choi, S H and Reitz, C and Pasquier, F and Cruchaga, C and Craig, D and Amin, N and Berr, C and Lopez, O L and De Jager, P L and Deramecourt, V and Johnston, J A and Evans, D and Lovestone, S and Letenneur, L and Mor{\'o}n, F J and Rubinsztein, D C and Eiriksdottir, G and Sleegers, K and Goate, A M and Fi{\'e}vet, N and Huentelman, M W and Gill, M and Brown, K and Kamboh, M I and Keller, L and Barberger-Gateau, P and McGuiness, B and Larson, E B and Green, R and Myers, A J and Dufouil, C and Todd, S and Wallon, D and Love, S and Rogaeva, E and Gallacher, J and St George-Hyslop, P and Clarimon, J and Lleo, A and Bayer, A and Tsuang, D W and Yu, L and Tsolaki, M and Boss{\`u}, P and Spalletta, G and Proitsi, P and Collinge, J and Sorbi, S and Sanchez-Garcia, F and Fox, N C and Hardy, J and Deniz Naranjo, M C and Bosco, P and Clarke, R and Brayne, C and Galimberti, D and Mancuso, M and Matthews, F and Moebus, S and Mecocci, P and Del Zompo, M and Maier, W and Hampel, H and Pilotto, A and Bullido, M and Panza, F and Caffarra, P and Nacmias, B and Gilbert, J R and Mayhaus, M and Lannefelt, L and Hakonarson, H and Pichler, S and Carrasquillo, M M and Ingelsson, M and Beekly, D and Alvarez, V and Zou, F and Valladares, O and Younkin, S G and Coto, E and Hamilton-Nelson, K L and Gu, W and Razquin, C and Pastor, P and Mateo, I and Owen, M J and Faber, K M and Jonsson, P V and Combarros, O and O{\textquoteright}Donovan, M C and Cantwell, L B and Soininen, H and Blacker, D and Mead, S and Mosley, T H and Bennett, D A and Harris, T B and Fratiglioni, L and Holmes, C and de Bruijn, R F and Passmore, P and Montine, T J and Bettens, K and Rotter, J I and Brice, A and Morgan, K and Foroud, T M and Kukull, W A and Hannequin, D and Powell, J F and Nalls, M A and Ritchie, K and Lunetta, K L and Kauwe, J S and Boerwinkle, E and Riemenschneider, M and Boada, M and Hiltuenen, M and Martin, E R and Schmidt, R and Rujescu, D and Wang, L S and Dartigues, J F and Mayeux, R and Tzourio, C and Hofman, A and N{\"o}then, M M and Graff, C and Psaty, B M and Jones, L and Haines, J L and Holmans, P A and Lathrop, M and Pericak-Vance, M A and Launer, L J and Farrer, L A and van Duijn, C M and Van Broeckhoven, C and Moskvina, V and Seshadri, S and Williams, J and Schellenberg, G D and Amouyel, P} } @article {6816, title = {Genetic contributions to variation in general cognitive function: a meta-analysis of genome-wide association studies in the CHARGE consortium (N=53949).}, journal = {Mol Psychiatry}, volume = {20}, year = {2015}, month = {2015 Feb}, pages = {183-92}, abstract = {

General cognitive function is substantially heritable across the human life course from adolescence to old age. We investigated the genetic contribution to variation in this important, health- and well-being-related trait in middle-aged and older adults. We conducted a meta-analysis of genome-wide association studies of 31 cohorts (N=53,949) in which the participants had undertaken multiple, diverse cognitive tests. A general cognitive function phenotype was tested for, and created in each cohort by principal component analysis. We report 13 genome-wide significant single-nucleotide polymorphism (SNP) associations in three genomic regions, 6q16.1, 14q12 and 19q13.32 (best SNP and closest gene, respectively: rs10457441, P=3.93 {\texttimes} 10(-9), MIR2113; rs17522122, P=2.55 {\texttimes} 10(-8), AKAP6; rs10119, P=5.67 {\texttimes} 10(-9), APOE/TOMM40). We report one gene-based significant association with the HMGN1 gene located on chromosome 21 (P=1 {\texttimes} 10(-6)). These genes have previously been associated with neuropsychiatric phenotypes. Meta-analysis results are consistent with a polygenic model of inheritance. To estimate SNP-based heritability, the genome-wide complex trait analysis procedure was applied to two large cohorts, the Atherosclerosis Risk in Communities Study (N=6617) and the Health and Retirement Study (N=5976). The proportion of phenotypic variation accounted for by all genotyped common SNPs was 29\% (s.e.=5\%) and 28\% (s.e.=7\%), respectively. Using polygenic prediction analysis, ~1.2\% of the variance in general cognitive function was predicted in the Generation Scotland cohort (N=5487; P=1.5 {\texttimes} 10(-17)). In hypothesis-driven tests, there was significant association between general cognitive function and four genes previously associated with Alzheimer{\textquoteright}s disease: TOMM40, APOE, ABCG1 and MEF2C.

}, keywords = {Aged, Aged, 80 and over, Atherosclerosis, Cognition, Cognition Disorders, Cohort Studies, Female, Genetic Predisposition to Disease, Genome-Wide Association Study, HMGN1 Protein, Humans, Male, Middle Aged, Neuropsychological Tests, Phenotype, Polymorphism, Single Nucleotide, Scotland}, issn = {1476-5578}, doi = {10.1038/mp.2014.188}, author = {Davies, G and Armstrong, N and Bis, J C and Bressler, J and Chouraki, V and Giddaluru, S and Hofer, E and Ibrahim-Verbaas, C A and Kirin, M and Lahti, J and van der Lee, S J and Le Hellard, S and Liu, T and Marioni, R E and Oldmeadow, C and Postmus, I and Smith, A V and Smith, J A and Thalamuthu, A and Thomson, R and Vitart, V and Wang, J and Yu, L and Zgaga, L and Zhao, W and Boxall, R and Harris, S E and Hill, W D and Liewald, D C and Luciano, M and Adams, H and Ames, D and Amin, N and Amouyel, P and Assareh, A A and Au, R and Becker, J T and Beiser, A and Berr, C and Bertram, L and Boerwinkle, E and Buckley, B M and Campbell, H and Corley, J and De Jager, P L and Dufouil, C and Eriksson, J G and Espeseth, T and Faul, J D and Ford, I and Gottesman, R F and Griswold, M E and Gudnason, V and Harris, T B and Heiss, G and Hofman, A and Holliday, E G and Huffman, J and Kardia, S L R and Kochan, N and Knopman, D S and Kwok, J B and Lambert, J-C and Lee, T and Li, G and Li, S-C and Loitfelder, M and Lopez, O L and Lundervold, A J and Lundqvist, A and Mather, K A and Mirza, S S and Nyberg, L and Oostra, B A and Palotie, A and Papenberg, G and Pattie, A and Petrovic, K and Polasek, O and Psaty, B M and Redmond, P and Reppermund, S and Rotter, J I and Schmidt, H and Schuur, M and Schofield, P W and Scott, R J and Steen, V M and Stott, D J and van Swieten, J C and Taylor, K D and Trollor, J and Trompet, S and Uitterlinden, A G and Weinstein, G and Widen, E and Windham, B G and Jukema, J W and Wright, A F and Wright, M J and Yang, Q and Amieva, H and Attia, J R and Bennett, D A and Brodaty, H and de Craen, A J M and Hayward, C and Ikram, M A and Lindenberger, U and Nilsson, L-G and Porteous, D J and R{\"a}ikk{\"o}nen, K and Reinvang, I and Rudan, I and Sachdev, P S and Schmidt, R and Schofield, P R and Srikanth, V and Starr, J M and Turner, S T and Weir, D R and Wilson, J F and van Duijn, C and Launer, L and Fitzpatrick, A L and Seshadri, S and Mosley, T H and Deary, I J} }