Association between osteopontin and human abdominal aortic aneurysm

Golledge, Jonathan, Muller, Juanita, Shephard, Neil, Clancy, Paula, Smallwood, Linda, Moran, Corey, Dear, Anthony E., Palmer, Lyle J., and Norman, Paul E. (2007) Association between osteopontin and human abdominal aortic aneurysm. Arteriosclerosis, Thrombosis and Vascular Biology, 27. pp. 655-660.

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Abstract

Objectives—In vitro and animal studies have implicated osteopontin (OPN) in the pathogenesis of aortic aneurysm. The relationship between serum concentration of OPN and variants of the OPN gene with human abdominal aortic aneurysm(AAA) was investigated. Methods and Results—OPN genotypes were examined in 4227 subjects in which aortic diameter and clinical risk factors were measured. Serum OPN was measured by ELISA in two cohorts of 665 subjects. The concentration of serum OPN was independently associated with the presence of AAA. Odds ratios (and 95% confidence intervals) for upper compared with lower OPN tertiles in predicting presence of AAA were 2.23 (1.29 to 3.85, P0.004) for the population cohort and 4.08 (1.67 to 10.00, P0.002) for the referral cohort after adjusting for other risk factors. In 198 patients with complete follow-up of aortic diameter at 3 years, initial serum OPN predicted AAA growth after adjustment for other risk factors (standardized coefficient 0.24, P0.001). The concentration of OPN in the aortic wall was greater in patients with small AAAs (30 to 50 mm) than those with aortic occlusive disease alone. There was no association between five single nucleotide polymorphisms or haplotypes of the OPN gene and aortic diameter or AAA expansion. Conclusions—Serum and tissue concentrations of OPN are associated with human AAA. We found no relationship between variation of the OPN gene and AAA. OPN may be a useful biomarker for AAA presence and growth.

Item ID: 2662
Item Type: Article (Research - C1)
ISSN: 1524-4636
Keywords: abdominal aortic aneurysm; genetic polymorphisms; osteopontin
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Date Deposited: 30 Jul 2009 05:45
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%
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