Abstract
Recent human genetic studies suggest that allelic variants of leukotriene pathway genes influence the risk of clinical and subclinical atherosclerosis. We sequenced the promoter, exonic, and splice site regions of ALOX5 and ALOX5AP and then genotyped 7 SNPs in ALOX5 and 6 SNPs in ALOX5AP in 1,552 cases with clinically significant coronary artery disease (CAD) and 1,583 controls from Kaiser Permanente including a subset of participants of the coronary artery risk development in young adults study. A nominally significant association was detected between a promoter SNP in ALOX5 (rs12762303) and CAD in our subset of white/European subjects (adjusted odds ratio per minor allele, log-additive model, 1.32; P = 0.002). In this race/ethnic group, rs12762303 has a minor allele frequency of 15% and is tightly linked to variation at the SP1 variable tandem repeat promoter polymorphism. However, the association between CAD and rs12762303 could not be reproduced in the atherosclerosis risk in communities study (hazard rate ratio per minor allele; 1.08, P = 0.1). Assuming a recessive mode of inheritance, the association was not significant in either population study but our power to detect modest effects was limited. No significant associations were observed between all other SNPs and the risk of CAD. Overall, our findings do not support a link between common allelic variation in or near ALOX5 or ALOX5AP and the risk of CAD. However, additional studies are needed to exclude modest effects of promoter variation in ALOX5 on the risk of CAD assuming a recessive mode of inheritance.
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Acknowledgments
The ADVANCE investigators wish to thank the many participants and staff who contributed to the ADVANCE study. The ADVANCE study was supported by a grant from the Donald W. Reynolds Foundation, Las Vegas, NV. JWK is supported by Post-Doctoral Research Fellowships from the Stanford University School of Medicine as well as the American Heart Association and the Integrated Therapeutics Group, Inc through investigator initiated research grants. Role of the Sponsor: The funding agency had no role in the design or conduct of the study; collection, management, analysis or interpretation of the data; or in preparation, review, or approval of the manuscript. The CARDIA study is supported by contracts N01-HC-48047, N01-HC-48048, N01-HC-48049, N01-HC-48050, and N01-HC-95095 from the National Heart, Lung, and Blood Institute. The Atherosclerosis Risk in Communities Study is carried out as a collaborative study supported by the National Heart, Lung, and Blood Institute contracts N01-HC-55015, N01-HC-55016, N01-HC-55018, N01-HC-55019, N01-HC-55020, N01-HC-55021, N01-HC-55022. The authors thank the staff and participants of the ARIC study for their important contributions. This study was also supported, in part, by NIH grant HL079353 (HA) and a portion of the work was conducted in a facility constructed with support from Research Facilities Improvement Program Grant Number C06 (RR10600-01, CA62528-01, RR14514-01) from the National Center for Research Resources.
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Themistocles L. Assimes and Joshua W. Knowles contributed equally to this work.
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Assimes, T.L., Knowles, J.W., Priest, J.R. et al. Common polymorphisms of ALOX5 and ALOX5AP and risk of coronary artery disease. Hum Genet 123, 399–408 (2008). https://doi.org/10.1007/s00439-008-0489-5
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DOI: https://doi.org/10.1007/s00439-008-0489-5