Journal
ATHEROSCLEROSIS
Volume 203, Issue 2, Pages 528-532Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.atherosclerosis.2008.07.009
Keywords
Cardiovascular disease; Antibodies; Phosphorylcholine; Immune system; Risk marker
Funding
- Swedish Heart Lung Foundation
- Swedish Research Council
- ALF
- Swedish Science Fund
- King Gustav V 80th Birthday Fund
- The Swedish Rheumatism Association
- The Torsten and Ragnar Soderberg Foundation
- Swedish Cancer Society
- Malmo University Hospital Foundation
- European Union [LSHM-CT-2006-037227 CVDIMMUNE]
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Background: Natural antibodies specific for phosphorylcholine (anti-PC) have been implicated as protective factors in atherosclerosis. We herein determined the relationship between IgM anti-PC and incidence of cardiovascular disease (CVD). Methods: We studied 349 incident cases (200 men) of first events of CVD (coronary heart disease (CHD; n = 203 or ischemic stroke; n = 146) and 693 age- and sex-matched controls identified through 12 years of follow-up (1991-2003) of subjects from the cardiovascular cohort within the Malmo Diet and Cancer Study. Relative risks (RR) of CVD with 95% confidence intervals (CI) of incident CVD with adjustments for age, smoking, total cholesterol and blood pressure were determined. Anti-PC-levels were measured using ELISA (Athera CVDefine (TM)). Results: As determined using Athera CVDefine (TM), significant associations were attained with values of anti-PC below 17 U/ml (corresponding to the lowest 9th percentile), which remained after taking confounders into account (RR: 1.79, 95% CI: 1.09-2.94, p=0.021). If men were studied separately, significance was evident at values below 17U/ml (RR: 2.01, 95% Cl: 1.11-3.67, p=0.022), which was not the case among women. Furthermore, values below 17 U/ml were also associated with ischemic stroke (RR = 3.67, 95% Cl: 1.34-10.1, p=0.01), but not with CHD. Conclusion: Low IgM anti-PC could be a novel risk marker for development of ischemic stroke in men. Further studies are needed to establish gender and subgroup differences. (C) 2008 Elsevier Ireland Ltd. All rights reserved.
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