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IgM-phosphorylcholine autoantibodies and outcome in acute coronary syndromes.

Journal article
Authors Kenneth Caidahl
Marianne Hartford
Thomas Karlsson
Johan Herlitz
K Pettersson
U de Faire
J Frostegård
Published in International Journal of Cardiology
Volume 167
Issue 2
Pages 464-469
ISSN 0167-5273
Publication year 2012
Published at Institute of Medicine, Department of Molecular and Clinical Medicine
Pages 464-469
Language en
Links https://doi.org/10.1016/j.ijcard.20...
Keywords Antibodies,Angina,Immune system,Myocardial infarction,Prognosis
Subject categories Cardiovascular medicine

Abstract

Abstract BACKGROUND: Antibodies against proinflammatory phosphorylcholine (anti-PC) seem to be protective and reduce morbidity. We sought to determine whether low levels of immunoglobulin-M (IgM) autoantibodies against PC add prognostic information in acute coronary syndromes (ACS). METHODS: IgM anti-PC titers were measured in serum obtained within 24h of admission from 1185 ACS patients (median age 66years, 30% women). We evaluated major acute cardiovascular events (MACE) and all-cause mortality short- (6months), intermediate- (18months) and long- (72months) terms. RESULTS: Low anti-PC titers were associated with MACE and all-cause mortality at all follow-up times. After adjusting for clinical variables, plasma troponin-I, proBNP and CRP levels, associations remained at all times with MACE, short and intermediate terms also with all-cause mortality. With anti-PC titers below median, adjusted hazard ratios at 18months were for MACE 1.79 (95% confidence interval [CI]: 1.31 to 2.44; p=0.0002) and for all-cause mortality 2.28 (95% CI: 1.32 to 3.92; p=0.003). Anti-PC and plasma CRP were unrelated and added to risk prediction. CONCLUSIONS: Serum IgM anti-PC titers provide prognostic information above traditional risk factors in ACS. The ease of measurement and potential therapeutic perspective indicate that it may be a valuable novel biomarker in ACS.

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