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Anti-apolipoprotein A-1 IgG as an independent cardiovascular prognostic marker affecting basal heart rate in myocardial infarction

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Published in European heart journal. 2010, vol. 31, no. 7, p. 815-823
Abstract AIMS: To assess the prognostic value of anti-apolipoprotein A-1 (anti-apoA-1) IgG after myocardial infarction (MI) and its association with major cardiovascular events (MACEs) at 12 months and to determine their association with resting heart rate (RHR), a well-established prognostic feature after MI. Anti-apoA-1 IgG have been reported in MI without autoimmune disease, but their clinical significance remains undetermined. METHODS AND RESULTS: A total of 221 consecutive patients with MI were prospectively included, and all completed a 12-month follow-up. Major cardiovascular events consisted in death, MI, stroke, or hospitalization either for an acute coronary syndrome or heart failure. Resting heart rate was obtained on Holter the day before discharge under the same medical treatment. Neonate rat ventricular cardiomyocytes (NRVC) were used in vitro to assess the direct anti-apoA-1 IgG effect on RHR. During follow-up, 13% of patients presented a MACE. Anti-apoA-1 IgG positivity was 9% and was associated with a higher RHR (P = 0.0005) and higher MACE rate (adjusted OR, 4.3; 95% CI, 1.46-12.6; P = 0.007). Survival models confirmed the significant nature of this association. Patients with MACE had higher median anti-apoA-1 IgG values at admission than patients without (P = 0.007). On NRVC, plasma from MI patients and monoclonal anti-apoA-1 IgG induced an aldosterone and dose-dependent positive chronotropic effect, abrogated by apoA-1 and therapeutic immunoglobulin (IVIG) pre-incubation. CONCLUSIONS: In MI patients, anti-apoA-1 IgG is independently associated with MACE at 1-year, interfering with a currently unknown aldosterone-dependent RHR determinant. Knowing whether anti-apoA-1 IgG assessment could be of interest to identify an MI patient subset susceptible to benefit from apoA-1/IVIG therapy remains to be demonstrated.
Keywords Acute Coronary Syndrome/mortalityAdultAgedAged, 80 and overAnimalsApolipoprotein A-I/*immunologyArrhythmias, Cardiac/*diagnosis/physiopathologyBiological Markers/metabolismDose-Response Relationship, ImmunologicEnzyme-Linked Immunosorbent AssayFemaleHeart Failure/mortalityHeart Rate/immunologyHumansImmunoglobulin G/*metabolismMaleMiddle AgedMyocardial Infarction/*diagnosis/mortality/physiopathologyMyocytes, Cardiac/immunologyPrognosisProspective StudiesRatsRats, WistarReference ValuesReproducibility of ResultsStroke/mortalityTreatment Outcome
PMID: 20176799
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Research groups Biologie du myocarde (22)
Chimie et protéomique clinique (270)
Etude de l'activation des monocytes/macrophages et des polynucléaires neutrophiles (779)
L'athérosclérose et ses complications cliniques (591)
Lipoprotéines sériques (598)
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VUILLEUMIER, Nicolas et al. Anti-apolipoprotein A-1 IgG as an independent cardiovascular prognostic marker affecting basal heart rate in myocardial infarction. In: European heart journal, 2010, vol. 31, n° 7, p. 815-823. doi: 10.1093/eurheartj/ehq055 https://archive-ouverte.unige.ch/unige:21385

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Deposited on : 2012-05-23

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