Abstract
Objective
Aldosterone stimulates cardiac collagen synthesis. Circulating biomarkers of collagen turnover provide a useful tool for the assessment of cardiac remodeling in patients with an acute myocardial infarction (MI).
Methods
The REMINDER trial assessed the effect of eplerenone in patients with an acute ST-elevation Myocardial Infarction (STEMI) without known heart failure (HF), when initiated within 24 h of symptom onset. The primary outcome was almost totally (>90%) driven by natriuretic peptide (NP) thresholds after 1-month post-MI (it also included a composite of cardiovascular death or re-hospitalization or new onset HF or sustained ventricular tachycardia or fibrillation or LVEF ≤40% after 1-month post-MI). This secondary analysis aims to assess the extracellular matrix marker (ECMM) levels with regards to: (1) patients` characteristics; (2) determinants; (3) and eplerenone effect.
Results
Serum levels of ECMM were measured in 526 (52%) of the 1012 patients enrolled in the REMINDER trial. Patients with procollagen type III N-terminal propeptide (PIIINP) above the median were older and had worse renal function (p < 0.05). Worse renal function was associated with increased levels of PIIINP (standardized β ≈ 0.20, p < 0.05). Eplerenone reduced PIIINP when the levels of this biomarker were above the median of 3.9 ng/mL (0.13 ± 1.48 vs. −0.37 ± 1.56 ng/mL, p = 0.008). Higher levels of PIIINP were independently associated with higher proportion of NP above the prespecified thresholds (HR = 1.95, 95% CI 1.16–3.29, p = 0.012).
Conclusions
Eplerenone effectively reduces PIIINP levels when baseline values were above the median. Eplerenone may limit ECMM formation in post-MI without HF.
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The authors acknowledge Pfizer, Inc for editorial support.
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The REMINDER study was funded by Pfizer, Inc.
Conflict of interest
JPF has no relevant conflicts of interest to report regarding the present manuscript. G.M., F.Z., L.d.S., C.W.H., M.F., F.V., and B.P. report to have received consulting or lecture fees from a number of pharmaceutical companies including Pfizer. J.V., E.T., M.O., and H.S. are full-time employees of Pfizer and own stock in this company. The complete author group had full access to all of the data in this study and take complete responsibility for the integrity of the data and the accuracy of the data analysis.
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Ferreira, J.P., Duarte, K., Montalescot, G. et al. Effect of eplerenone on extracellular cardiac matrix biomarkers in patients with acute ST-elevation myocardial infarction without heart failure: insights from the randomized double-blind REMINDER Study. Clin Res Cardiol 107, 49–59 (2018). https://doi.org/10.1007/s00392-017-1157-3
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DOI: https://doi.org/10.1007/s00392-017-1157-3