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Markousis-Mavrogenis_et_al-2019-European_Journal_of_Heart_Failure.pdf (1.15 MB)

The clinical significance of interleukin-6 in heart failure: results from the BIOSTAT-CHF study.

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posted on 2019-06-14, 14:17 authored by G Markousis-Mavrogenis, J Tromp, W Ouwerkerk, M Devalaraja, SD Anker, JG Cleland, K Dickstein, GS Filippatos, P van der Harst, CC Lang, M Metra, LL Ng, P Ponikowski, NJ Samani, F Zannad, AH Zwinderman, HL Hillege, DJ van Veldhuisen, R Kakkar, AA Voors, P van der Meer
AIMS: Inflammation is a central process in the pathophysiology of heart failure (HF), but trials targeting tumour necrosis factor (TNF)-α were largely unsuccessful. Interleukin (IL)-6 is an important inflammatory mediator and might constitute a potential pharmacologic target in HF. However, little is known regarding the association between IL-6 and clinical characteristics, outcomes and other inflammatory biomarkers in HF. We thus aimed to identify and characterize these associations. METHODS AND RESULTS: Interleukin-6 was measured in 2329 patients [89.4% with a left ventricular ejection fraction (LVEF) ≤ 40%] of the BIOSTAT-CHF cohort. The primary outcome was all-cause mortality and HF hospitalization during 2 years, with all-cause, cardiovascular (CV), and non-CV death as secondary outcomes. Approximately half (56%) of all included patients had plasma IL-6 values greater than the previously determined 95th percentile of normal values at baseline. Elevated N-terminal pro-brain natriuretic peptide, procalcitonin and hepcidin, younger age, TNF-α/IL-1-related biomarkers, or having iron deficiency, atrial fibrillation and LVEF > 40% independently predicted elevated IL-6 levels. IL-6 independently predicted the primary outcome [HR (95% confidence interval) per doubling: 1.16 (1.11-1.21), P < 0.001], all-cause mortality [1.22 (1.16-1.29), P < 0.001] and CV as well as non-CV mortality [1.16 (1.09-1.24), P < 0.001; 1.31 (1.18-1.45), P < 0.001], but did not improve discrimination in previously published risk models. CONCLUSIONS: In a large, heterogeneous cohort of HF patients, elevated IL-6 levels were found in more than 50% of patients and were associated with iron deficiency, reduced LVEF, atrial fibrillation and poorer clinical outcomes. These findings warrant further investigation of IL-6 as a potential therapeutic target in specific HF subpopulations.

Funding

The authors gratefully acknowledge the assistance offered by Singulex Inc. regarding the determination of plasma interleukin‐6 and troponin T levels and the assistance offered by Roche diagnostics regarding the determination plasma N‐terminal pro‐brain type natriuretic peptide in blood samples from the BIOSTAT‐CHF index study cohort. Funding BIOSTAT‐CHF was funded by the European Commission [FP7‐242209‐BIOSTAT‐CHF; EudraCT 2010‐020808‐29]. An unrestricted research grant by Corvidia Therapeutics supported this manuscript.

History

Citation

European Journal of Heart Failure, 2019

Author affiliation

/Organisation/COLLEGE OF LIFE SCIENCES/School of Medicine/Department of Cardiovascular Sciences

Version

  • VoR (Version of Record)

Published in

European Journal of Heart Failure

Publisher

Wiley for European Society of Cardiology

eissn

1879-0844

Acceptance date

2019-04-12

Copyright date

2019

Available date

2019-06-14

Publisher version

https://onlinelibrary.wiley.com/doi/full/10.1002/ejhf.1482

Notes

Additional supporting information may be found online in the Supporting Information section at the end of the article.

Language

en

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