Abstract
Cigarette smoking and hypercholesterolemia influence the renin-angiotensin system (RAS) functions, including increased RAS-mediated vasoconstriction, mitogenic signaling, and angiotensin II type 1 receptor (AT1R) expression. We have explored the interactions of the AT 1 R gene 1166 A>C polymorphism and traditional risk factors using an epidemiological approach. The study cohort included 341 subjects; 172 were patients with angiographically confirmed coronary artery disease (CAD) and 169 were blood donors. The 1166 A>C polymorphism was genotyped using the PCR-RFLP method. We found a synergy of the 1166C allele with cigarette smoking (synergy indices: SI = 1.41, SIM = 1.33), LDL cholesterol levels ≥ 3 mmol/l (SI = 1.25, SIM = 1.19), and elevated total cholesterol (≥5 mmol/l) levels (SI = 1.15, SIM = 1.13). In each case, the estimated CAD risk was greater than that predicted by assuming the additivity and multiplication of effects. We conclude that the 1166C allele increases the risk of CAD associated with the presence of cigarette smoking and hypercholesterolemia.
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Acknowledgment
This work was supported by the Medical University of Silesia within the projects NN-2-016/06, NN-2-102/05.
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Niemiec, P., Zak, I. & Wita, K. The Risk of Coronary Artery Disease Associated with Cigarette Smoking and Hypercholesterolemia Is Additionally Increased by the Presence of the AT 1 R Gene 1166C Allele. Biochem Genet 46, 799–809 (2008). https://doi.org/10.1007/s10528-008-9194-2
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DOI: https://doi.org/10.1007/s10528-008-9194-2