International Journal of Cardiology: Heart & Vasculature (Dec 2017)

The circular RNA MICRA for risk stratification after myocardial infarction

  • Antonio Salgado-Somoza,
  • Lu Zhang,
  • Melanie Vausort,
  • Yvan Devaux

DOI
https://doi.org/10.1016/j.ijcha.2017.11.001
Journal volume & issue
Vol. 17, no. C
pp. 33 – 36

Abstract

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Background: A significant proportion of patients develop heart failure (HF) after acute myocardial infarction (MI). Predicting this development with novel biomarkers would allow tailoring healthcare to each individual. We recently identified a circular RNA called MICRA which was associated with HF development after MI. Here, we tested whether MICRA was able to risk stratify MI patients. Methods: MICRA was assessed in whole blood samples collected at reperfusion in 472 patients with acute MI. Left ventricular ejection fraction (EF) was evaluated by echocardiography at 4 months. Multivariable analyses with ordinal regression were conducted to determine the ability of MICRA to classify patients into 3 EF groups: reduced EF (≤40%), mid-range EF (4149%) and preserved EF (≥50%). Results: Eighty seven patients (18%) had a reduced EF, 106 (22%) had a mid-range EF and 279 (59%) had a preserved EF at 4 months. MICRA classified patients into EF groups with an adjusted odds ratio [95% confidence interval] of 0.78 [0.64–0.95]. MICRA improved the predictive value of a multivariable clinical model as attested by a decrease of the Akaike Information Criteria (p = 0.012). Bootstrap internal validation confirmed the incremental prognostic value of MICRA. Conclusion: We report that the circRNA MICRA improves risk classification after MI, supporting the added value of this novel biomarker in future prognostication strategies.

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