Angiotensin II type 1 receptor 1166C polymorphism is associated with abdominal aortic aneurysm in three independent cohorts

Jones, Gregory T., Thompson, Andrew R., van Bockxmeer, Frank M., Hafez, Hany, Cooper, Jackie A., Golledge, Jonathan, Humphries, Stephen E., Norman, Paul E., and Van Rij, Andre M. (2008) Angiotensin II type 1 receptor 1166C polymorphism is associated with abdominal aortic aneurysm in three independent cohorts. Arteriosclerosis, Thrombosis and Vascular Biology, 28 (4). pp. 764-770.

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Abstract

Objectives—Although polymorphic variations in genes of the RAS system have previously been associated with susceptibility to AAA, such studies have been significantly limited by small sample sizes. This study was undertaken, using the largest case series yet reported, to determine whether common genetic variants of the RAS are associated with either susceptibility or severity of AAA.

Methods and Results—The frequencies of 4 common genetic variants of genes related to the renin-angiotensin system were investigated in 3 geographically distinct, but ethnically similar, case-control cohorts, resulting in comparison of 1226 AAA cases with 1723 controls. In all 3 the AGTR1 1166C allele was significantly more common in AAA patients than controls (overall adjusted OR 1.60, 95% CI 1.32 to 1.93, P=1.1x10–6). Overall, the ACE ID genotype was associated with AAA (OR 1.33, 95% CI 1.06 to 1.67, P<0.02). The AGT 268T allele appeared to have an epistatic effect on large aneurysm size.

Conclusion—This study has identified a strong and repeated association between the AGTR1 1166C allele and susceptibility to AAA, and a weaker effect associated with the ACE deletion allele, in 3 geographically distinct, but ethnically similar, case-control cohorts. This study highlights the key role of the RAS in AAA and emphasizes the need for replication and validation of results in suitable independent cohorts.

Item ID: 5812
Item Type: Article (Refereed Research - C1)
Keywords: abdominal aortic aneurysm; angiotensinogen; angiotensin converting enzyme; angiotensin; Bradykinin; genetic association; renin
ISSN: 1524-4636
Date Deposited: 05 Jan 2010 03:55
FoR Codes: 11 MEDICAL AND HEALTH SCIENCES > 1102 Cardiovascular Medicine and Haematology > 110201 Cardiology (incl Cardiovascular Diseases) @ 100%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920103 Cardiovascular System and Diseases @ 100%
Citation Count from Web of Science Web of Science 34
Downloads: Total: 1
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