Genetics
CETP B1 allele combined with an eNOS variant raises coronary artery disease risk 18-fold in Western Iranians (Hum Genomics 2012)
Original title: Strong interaction between T allele of endothelial nitric oxide synthase with B1 allele of cholesteryl ester transfer protein TaqIB highly elevates the risk of coronary artery disease and type 2 diabetes mellitus
This study investigated the interaction between NOS3 (eNOS) G894T and CETP TaqIB variants on coronary artery disease (CAD) and type 2 diabetes mellitus (T2DM) risk, in 207 CAD patients (102 with T2DM, 105 without), 101 T2DM patients, and 92 matched controls from Western Iran. The NOS3 T allele alone was not associated with CAD or T2DM risk, but the CETP B1 allele alone was significantly associated with increased CAD risk in the total CAD group (OR 5.1, p=0.019). The concomitant presence of both CETP B1 and NOS3 T alleles significantly increased CAD risk in the total CAD group (OR 18.1, p less than 0.001), in CAD patients without T2DM (OR 27.1, p=0.03), and in CAD patients with T2DM (OR 13.5, p=0.002), and also increased T2DM risk (OR 12, p=0.004). The authors report this as the first demonstration that the NOS3 T allele strongly interacts with the CETP B1 allele to augment CAD and T2DM risk in this population.
Original abstract
Background: The present study was conducted to investigate the possible outcome of interaction between endothelial nitric oxide (NOS3) G894T and cholesteryl ester transfer TaqIB variants on the risk of coronary artery disease (CAD) and type 2 diabetes mellitus (T2DM). The sample included a total of 207 CAD patients (102 CAD patients with T2DM and 105 CAD patients without T2DM). There were also 101 patients with T2DM and 92 age- and sex-matched healthy individuals as controls. All study participants were from Western Iran. The sample was genotyped by polymerase chain reaction-restriction fragment length polymorphism.
Results: The presence of NOS3 T allele was not associated with the risk of CAD or T2DM, and the CETP B1 allele was only significantly associated with the increased risk of CAD in total CAD patients (odds ratio (OR) = 5.1, p = 0.019). However, the concomitant presence of both CETP B1 and NOS3 T alleles significantly increased the risk of CAD in total CAD patients (OR = 18.1, p < 0.001), in CAD patients without T2DM (OR = 27.1, p = 0.03), and in CAD patients with T2DM (OR = 13.5, p = 0.002). Also, the presence of both alleles increased the risk of T2DM (OR = 12, p = 0.004).
Conclusions: Our findings, for the first time, indicate that NOS3 T allele strongly interacts with CETP B1 allele to augment the risk of CAD and T2DM in the population of Western Iran.
Summary written by cetpinhibition.org from the published abstract; figures as published. Page updated 19 August 2026. Methods.