%0 Journal Article
%T An evaluation of inflammatory gene polymorphisms in sibships discordant for premature coronary artery disease: the GRACE-IMMUNE study
%A Benjamin D Brown
%A J¨Śr¨Śmie Nsengimana
%A Jennifer H Barrett
%A Richard A Lawrence
%A Lori Steiner
%A Suzanne Cheng
%A D Timothy Bishop
%A Nilesh J Samani
%A Stephen G Ball
%A Anthony J Balmforth
%A Alistair S Hall
%J BMC Medicine
%D 2010
%I BioMed Central
%R 10.1186/1741-7015-8-5
%X Family-based association tests (FBAT) and conditional logistic regression (CLR) were applied to single SNPs and haplotypes and, in CLR, traditional risk factors of CAD were adjusted for.An association was observed between CAD and a common three-locus haplotype in the interleukin one (IL-1) cluster with P = 0.006 in all CAD cases, P = 0.01 in myocardial infarction (MI) cases and P = 0.0002 in young onset CAD cases (<50 years). The estimated odds ratio (OR) per copy of this haplotype is 1.21 (95% confidence interval [95CI] = 1.04 - 1.40) for CAD; 1.30 (95CI = 1.09 - 1.56) for MI and 1.50 (95CI = 1.22 - 1.86) for young onset CAD. When sex, smoking, hypertension and hypercholesterolaemia were adjusted for, the haplotype effect remained nominally significant (P = 0.05) in young onset CAD cases, more so (P = 0.002) when hypercholesterolaemia was excluded. As many as 82% of individuals affected by CAD had hypercholesterolaemia compared to only 29% of those unaffected, making the two phenotypes difficult to separate.Despite the multiple hypotheses tested, the robustness of family design to population confoundings and the consistency with previous findings increase the likelihood of true association. Further investigation using larger data sets is needed in order for this to be confirmed.See the related commentary by Keavney: http://www.biomedcentral.com/1741-7015/8/6 webciteCoronary atherosclerosis is predominantly an asymptomatic process that progresses over the course of a lifetime. Arterial inflammation is central to plaque progression and plaque rupture with atherosclerotic lesions established as active sites of inflammation [1]. In particular, cytokines appear to coordinate the development of atherosclerosis leading to the formation of complex atherosclerotic plaques. These, in turn, can trigger acute thromboembolic complications such as myocardial infarction (MI) and the rupture/repair process that promotes the progression of luminal narrowing [2]. Furthermore, those
%U http://www.biomedcentral.com/1741-7015/8/5