Plasma ferritin concentrations are not associated with abdominal aortic aneurysm diagnosis, size or growth

Moxon, Joseph V., Jones, Rhondda E., Norman, Paul E., Clancy, Paula, Flicker, Leon, Almeida, Osvaldo P., Hankey, Graeme J., Yeap, Bu B., and Golledge, Jonathan (2016) Plasma ferritin concentrations are not associated with abdominal aortic aneurysm diagnosis, size or growth. Atherosclerosis, 251. pp. 19-24.

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Abstract

Background and aims: Experimental studies using a rodent model have suggested that iron overload may contribute to abdominal aortic aneurysm (AAA) pathogenesis.

Methods: We assessed the association of total body iron, as measured by plasma ferritin, with AAA diagnosis, size and growth in 4024 community-dwelling older men screened for AAA, using logistic regression and linear mixed effects models.

Results: Plasma ferritin concentrations were similar in men who did (n = 293) and did not (n = 3731) have an AAA (median [inter-quartile range] concentrations 115.4 [63.0–203.1] and 128.5 [66.1–229.1] ng/mL respectively, p = 0.124). There was no association between plasma ferritin concentration and AAA diagnosis in unadjusted logistic regression (odds ratio (OR) for a 1 standard deviation increase: 0.880 [95%CI: 0.764–1.015]; p = 0.078), or when adjusting for AAA risk factors and factors known to influence circulating ferritin (OR for a 1 standard deviation increase: 0.898 [95% CI: 0.778–1.035]; p = 0.138). Iron overload prevalence (plasma ferritin concentrations >200 ng/mL) was lower in men with an AAA (25.3%) than those without (30.8%; p = 0.048), but was not associated with AAA diagnosis after adjusting as above (OR: 0.781 [95% CI:0.589–1.035]; p = 0.086). The association of iron overload with AAA growth was investigated in 265 men with small AAAs who received at least 1 repeat ultrasound scan in the 3 years following screening. We saw no difference in AAA growth between men who did and did not have iron overload (n = 65 and 185 respectively, p = 0.164).

Conclusions: Our data suggest that iron overload is unlikely to be important in AAA pathogenesis.

Item ID: 44127
Item Type: Article (Research - C1)
ISSN: 1879-1484
Keywords: abdominal aortic aneurysm; ferritin; iron overload; biomarker
Funders: James Cook University (JCU), National Health and Medical Research Council (NHMRC), The Townsville Hospital Private Practice Trust Fund, Queensland Government
Projects and Grants: NHMRC 1079193, NHMRC 1079369, NHMRC 1021416, NHMRC 1000967
Date Deposited: 20 Jul 2016 00:35
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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