@article {1077, title = {Genetic variations in nitric oxide synthase 1 adaptor protein are associated with sudden cardiac death in US white community-based populations.}, journal = {Circulation}, volume = {119}, year = {2009}, month = {2009 Feb 24}, pages = {940-51}, abstract = {

BACKGROUND: The ECG QT interval is associated with risk of sudden cardiac death (SCD). A previous genome-wide association study demonstrated that allelic variants (rs10494366 and rs4657139) in the nitric oxide synthase 1 adaptor protein (NOS1AP), which encodes a carboxy-terminal PDZ ligand of neuronal nitric oxide synthase, are associated with the QT interval in white adults. The present analysis was conducted to validate the association between NOS1AP variants and the QT interval and to examine the association with SCD in a combined population of 19 295 black and white adults from the Atherosclerosis Risk In Communities Study and the Cardiovascular Health Study.

METHODS AND RESULTS: We examined 19 tagging single-nucleotide polymorphisms in the genomic blocks containing rs10494366 and rs4657139 in NOS1AP. SCD was defined as a sudden pulseless condition of cardiac origin in a previously stable individual. General linear models and Cox proportional hazards regression models were used. Multiple single-nucleotide polymorphisms in NOS1AP, including rs10494366, rs4657139, and rs16847548, were significantly associated with adjusted QT interval in whites (P<0.0001). In whites, after adjustment for age, sex, and study, the relative hazard of SCD associated with each C allele at rs16847548 was 1.31 (95\% confidence interval 1.10 to 1.56, P=0.002), assuming an additive model. In addition, a downstream neighboring single-nucleotide polymorphism, rs12567209, which was not correlated with rs16847548 or QT interval, was also independently associated with SCD in whites (relative hazard 0.57, 95\% confidence interval 0.39 to 0.83, P=0.003). Adjustment for QT interval and coronary heart disease risk factors attenuated but did not eliminate the association between rs16847548 and SCD, and such adjustment had no effect on the association between rs12567209 and SCD. No significant associations between tagging single-nucleotide polymorphisms in NOS1AP and either QT interval or SCD were observed in blacks.

CONCLUSIONS: In a combined analysis of 2 population-based prospective cohort studies, sequence variations in NOS1AP were associated with baseline QT interval and the risk of SCD in white US adults.

}, keywords = {Adaptor Proteins, Signal Transducing, Aged, Death, Sudden, Cardiac, Electrocardiography, European Continental Ancestry Group, Genotype, Humans, Middle Aged, Polymorphism, Single Nucleotide, Risk Factors}, issn = {1524-4539}, doi = {10.1161/CIRCULATIONAHA.108.791723}, author = {Kao, W H Linda and Arking, Dan E and Post, Wendy and Rea, Thomas D and Sotoodehnia, Nona and Prineas, Ronald J and Bishe, Bryan and Doan, Betty Q and Boerwinkle, Eric and Psaty, Bruce M and Tomaselli, Gordon F and Coresh, Josef and Siscovick, David S and Marb{\'a}n, Eduardo and Spooner, Peter M and Burke, Gregory L and Chakravarti, Aravinda} } @article {1182, title = {Genome-wide association study identifies GPC5 as a novel genetic locus protective against sudden cardiac arrest.}, journal = {PLoS One}, volume = {5}, year = {2010}, month = {2010 Mar 25}, pages = {e9879}, abstract = {

BACKGROUND: Existing studies indicate a significant genetic component for sudden cardiac arrest (SCA) and genome-wide association studies (GWAS) provide an unbiased approach for identification of novel genes. We performed a GWAS to identify genetic determinants of SCA.

METHODOLOGY/PRINCIPAL FINDINGS: We used a case-control design within the ongoing Oregon Sudden Unexpected Death Study (Oregon-SUDS). Cases (n = 424) were SCAs with coronary artery disease (CAD) among residents of Portland, OR (2002-07, population approximately 1,000,000) and controls (n = 226) were residents with CAD, but no history of SCA. All subjects were of White-European ancestry and GWAS was performed using Affymetrix 500K/5.0 and 6.0 arrays. High signal markers were genotyped in SCA cases (n = 521) identified from the Atherosclerosis Risk in Communities Study (ARIC) and the Cardiovascular Health Study (CHS) (combined n = 19,611). No SNPs reached genome-wide significance (p<5x10(-8)). SNPs at 6 loci were prioritized for follow-up primarily based on significance of p<10(-4) and proximity to a known gene (CSMD2, GPR37L1, LIN9, B4GALNT3, GPC5, and ZNF592). The minor allele of GPC5 (GLYPICAN 5, rs3864180) was associated with a lower risk of SCA in Oregon-SUDS, an effect that was also observed in ARIC/CHS whites (p<0.05) and blacks (p<0.04). In a combined Cox proportional hazards model analysis that adjusted for race, the minor allele exhibited a hazard ratio of 0.85 (95\% CI 0.74 to 0.98; p<0.01).

CONCLUSIONS/SIGNIFICANCE: A novel genetic locus for SCA, GPC5, was identified from Oregon-SUDS and successfully validated in the ARIC and CHS cohorts. Three other members of the Glypican family have been previously implicated in human disease, including cardiac conditions. The mechanism of this specific association requires further study.

}, keywords = {Aged, Alleles, Case-Control Studies, Cohort Studies, Death, Sudden, Cardiac, Ethnic Groups, Female, Genetic Predisposition to Disease, Genome-Wide Association Study, Glypicans, Heart Diseases, Humans, Male, Middle Aged, Models, Genetic, Oligonucleotide Array Sequence Analysis, Oregon, Polymorphism, Single Nucleotide}, issn = {1932-6203}, doi = {10.1371/journal.pone.0009879}, author = {Arking, Dan E and Reinier, Kyndaron and Post, Wendy and Jui, Jonathan and Hilton, Gina and O{\textquoteright}Connor, Ashley and Prineas, Ronald J and Boerwinkle, Eric and Psaty, Bruce M and Tomaselli, Gordon F and Rea, Thomas and Sotoodehnia, Nona and Siscovick, David S and Burke, Gregory L and Marb{\'a}n, Eduardo and Spooner, Peter M and Chakravarti, Aravinda and Chugh, Sumeet S} } @article {1304, title = {Identification of a sudden cardiac death susceptibility locus at 2q24.2 through genome-wide association in European ancestry individuals.}, journal = {PLoS Genet}, volume = {7}, year = {2011}, month = {2011 Jun}, pages = {e1002158}, abstract = {

Sudden cardiac death (SCD) continues to be one of the leading causes of mortality worldwide, with an annual incidence estimated at 250,000-300,000 in the United States and with the vast majority occurring in the setting of coronary disease. We performed a genome-wide association meta-analysis in 1,283 SCD cases and >20,000 control individuals of European ancestry from 5 studies, with follow-up genotyping in up to 3,119 SCD cases and 11,146 controls from 11 European ancestry studies, and identify the BAZ2B locus as associated with SCD (Pā€Š=ā€Š1.8{\texttimes}10(-10)). The risk allele, while ancestral, has a frequency of ~1.4\%, suggesting strong negative selection and increases risk for SCD by 1.92-fold per allele (95\% CI 1.57-2.34). We also tested the role of 49 SNPs previously implicated in modulating electrocardiographic traits (QRS, QT, and RR intervals). Consistent with epidemiological studies showing increased risk of SCD with prolonged QRS/QT intervals, the interval-prolonging alleles are in aggregate associated with increased risk for SCD (Pā€Š=ā€Š0.006).

}, keywords = {Adult, Aged, Alleles, Chromosomes, Human, Pair 2, Death, Sudden, Cardiac, European Continental Ancestry Group, Female, Genetic Loci, Genetic Predisposition to Disease, Genome-Wide Association Study, Humans, Male, Middle Aged, Myocardial Contraction, Polymorphism, Single Nucleotide}, issn = {1553-7404}, doi = {10.1371/journal.pgen.1002158}, author = {Arking, Dan E and Junttila, M Juhani and Goyette, Philippe and Huertas-Vazquez, Adriana and Eijgelsheim, Mark and Blom, Marieke T and Newton-Cheh, Christopher and Reinier, Kyndaron and Teodorescu, Carmen and Uy-Evanado, Audrey and Carter-Monroe, Naima and Kaikkonen, Kari S and Kortelainen, Marja-Leena and Boucher, Gabrielle and Lagac{\'e}, Caroline and Moes, Anna and Zhao, XiaoQing and Kolodgie, Frank and Rivadeneira, Fernando and Hofman, Albert and Witteman, Jacqueline C M and Uitterlinden, Andr{\'e} G and Marsman, Roos F and Pazoki, Raha and Bardai, Abdennasser and Koster, Rudolph W and Dehghan, Abbas and Hwang, Shih-Jen and Bhatnagar, Pallav and Post, Wendy and Hilton, Gina and Prineas, Ronald J and Li, Man and K{\"o}ttgen, Anna and Ehret, Georg and Boerwinkle, Eric and Coresh, Josef and Kao, W H Linda and Psaty, Bruce M and Tomaselli, Gordon F and Sotoodehnia, Nona and Siscovick, David S and Burke, Greg L and Marb{\'a}n, Eduardo and Spooner, Peter M and Cupples, L Adrienne and Jui, Jonathan and Gunson, Karen and Kesaniemi, Y Antero and Wilde, Arthur A M and Tardif, Jean-Claude and O{\textquoteright}Donnell, Christopher J and Bezzina, Connie R and Virmani, Renu and Stricker, Bruno H C H and Tan, Hanno L and Albert, Christine M and Chakravarti, Aravinda and Rioux, John D and Huikuri, Heikki V and Chugh, Sumeet S} }