Differentiating heart failure phenotypes using sex-specific transcriptomic and proteomic biomarker panels

Mustafa Toma, George J Mak, Virginia Chen, Zsuzsanna Hollander, Casey P Shannon, Karen K Y Lam, Raymond T Ng, Scott J Tebbutt, Janet E Wilson-McManus, Andrew Ignaszewski, Todd Anderson, Jason R B Dyck, Jonathan Howlett, Justin Ezekowitz, Bruce M McManus, Gavin Y Oudit, Mustafa Toma, George J Mak, Virginia Chen, Zsuzsanna Hollander, Casey P Shannon, Karen K Y Lam, Raymond T Ng, Scott J Tebbutt, Janet E Wilson-McManus, Andrew Ignaszewski, Todd Anderson, Jason R B Dyck, Jonathan Howlett, Justin Ezekowitz, Bruce M McManus, Gavin Y Oudit

Abstract

Aims: Heart failure with preserved ejection fraction (HFpEF) accounts for 30-50% of patients with heart failure (HF). A major obstacle in HF management is the difficulty in differentiating between HFpEF and heart failure with reduced ejection fraction (HFrEF) using conventional clinical and laboratory investigations. The aim of this study is to develop robust transcriptomic and proteomic biomarker signatures that can differentiate HFpEF from HFrEF.

Methods and results: A total of 210 HF patients were recruited in participating institutions from the Alberta HEART study. An expert clinical adjudicating panel differentiated between patients with HFpEF and HFrEF. The discovery cohort consisted of 61 patients, and the replication cohort consisted of 70 patients. Transcriptomic and proteomic data were analysed to find panels of differentiating HFpEF from HFrEF. In the discovery cohort, a 22-transcript panel was found to differentiate HFpEF from HFrEF in male patients with a cross-validation AUC of 0.74, as compared with 0.70 for N-terminal pro-B-type natriuretic peptide (NT-proBNP) in those same patients. An ensemble of the transcript panel and NT-pro-BNP yielded a cross-validation AUC of 0.80. This performance improvement was also observed in the replication cohort. An ensemble of the transcriptomic panel with NT-proBNP produced a replication AUC of 0.90, as compared with 0.74 for NT-proBNP alone and 0.73 for the transcriptomic panel.

Conclusions: We have identified a male-specific transcriptomic biomarker panel that can differentiate between HFpEF and HFrEF. These biosignatures could be further replicated on other patients and potentially be developed into a blood test for better management of HF patients.

Keywords: Biomarkers; Heart failure; Heart failure with preserved ejection fraction; Heart failure with reduced ejection fraction; Proteomics; Transcriptomics.

© 2017 The Authors. ESC Heart Failure published by John Wiley & Sons Ltd on behalf of the European Society of Cardiology.

Figures

Figure 1
Figure 1
The 10 most statistically significant pathway maps identified by MetaCore, based on all differentially expressed transcripts [false discovery rate 

Figure 2

The three pathway maps identified…

Figure 2

The three pathway maps identified as statistically significant (false discovery rate

Figure 2
The three pathway maps identified as statistically significant (false discovery rate 

Figure 3

Replication receiver operating characteristic curves…

Figure 3

Replication receiver operating characteristic curves of male‐specific classifiers. (A) Performance of the transcriptomic…

Figure 3
Replication receiver operating characteristic curves of male‐specific classifiers. (A) Performance of the transcriptomic panel, N‐terminal proBN (NT‐proBNP), and their ensemble; (B) Performance of the transcriptomic panel, cell proportion model, and their ensemble. HFpEF, heart failure with preserved ejection fraction; HFrEF, heart failure with reduced ejection fraction.

Figure 4

Replication receiver operating characteristic curves…

Figure 4

Replication receiver operating characteristic curves of female‐specific classifiers. HFpEF, heart failure with preserved…

Figure 4
Replication receiver operating characteristic curves of female‐specific classifiers. HFpEF, heart failure with preserved ejection fraction; HFrEF, heart failure with reduced ejection fraction; NT‐proBNP, N‐terminal proBN.
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References
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Figure 2
Figure 2
The three pathway maps identified as statistically significant (false discovery rate 

Figure 3

Replication receiver operating characteristic curves…

Figure 3

Replication receiver operating characteristic curves of male‐specific classifiers. (A) Performance of the transcriptomic…

Figure 3
Replication receiver operating characteristic curves of male‐specific classifiers. (A) Performance of the transcriptomic panel, N‐terminal proBN (NT‐proBNP), and their ensemble; (B) Performance of the transcriptomic panel, cell proportion model, and their ensemble. HFpEF, heart failure with preserved ejection fraction; HFrEF, heart failure with reduced ejection fraction.

Figure 4

Replication receiver operating characteristic curves…

Figure 4

Replication receiver operating characteristic curves of female‐specific classifiers. HFpEF, heart failure with preserved…

Figure 4
Replication receiver operating characteristic curves of female‐specific classifiers. HFpEF, heart failure with preserved ejection fraction; HFrEF, heart failure with reduced ejection fraction; NT‐proBNP, N‐terminal proBN.
Figure 3
Figure 3
Replication receiver operating characteristic curves of male‐specific classifiers. (A) Performance of the transcriptomic panel, N‐terminal proBN (NT‐proBNP), and their ensemble; (B) Performance of the transcriptomic panel, cell proportion model, and their ensemble. HFpEF, heart failure with preserved ejection fraction; HFrEF, heart failure with reduced ejection fraction.
Figure 4
Figure 4
Replication receiver operating characteristic curves of female‐specific classifiers. HFpEF, heart failure with preserved ejection fraction; HFrEF, heart failure with reduced ejection fraction; NT‐proBNP, N‐terminal proBN.

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