Abstract
Pulmonary arterial hypertension (PAH) is a devastating complication of Systemic Sclerosis (SSc). Screening for PAH in SSc has increased detection, allowed early treatment for PAH, and improved patient outcomes. Blood-based biomarkers that reliably identify SSc patients at risk of PAH, or with early disease, would significantly improve screening, potentially leading to improved survival, and provide novel mechanistic insights into early disease. The main objective of this study was to identify a proteomic biomarker signature that could discriminate SSc patients with, and without PAH using a Machine Learning approach, and to validate the findings in an external cohort.
Serum samples from patients with SSc and PAH (n=77) and SSc without PH (non-PH, n=80) were randomly selected from the clinical DETECT study and underwent proteomic screening using the MYRIAD RBM discovery platform consisting of 313 proteins. Samples from an independent validation cohort (SSc-PAH, n=22 and non-PH, n=22) were obtained from University of Sheffield, UK. Random Forest (RF) analysis identified a novel panel of eight proteins, comprising Collagen IV, Endostatin, IGFBP-2, IGFBP-7, MMP-2, Neuropilin-1, NT-proBNP and RAGE, that discriminated PAH from non-PH in SSc patients in the DETECT discovery cohort (average area under the ROC values (ROC-AUC) of 0.741, 65.1% sensitivity / 69.0% specificity) was reproduced in the Sheffield cohort (81.1% accuracy, 77.3% sensitivity / 86.5% specificity). This novel 8-protein biomarker panel has the potential to improve early detection of PAH in SSc patients and may provide novel insights into the pathogenesis of PAH in the context of SSc.
Footnotes
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Conflict of interest: Dr. Bauer has nothing to disclose.
Conflict of interest: Dr. de Bernard reports grant from Idorsia, during the conduct of the study;.
Conflict of interest: Dr. Hickey has nothing to disclose.
Conflict of interest: Dr. Ballard has nothing to disclose.
Conflict of interest: Dr. Cruz has nothing to disclose.
Conflict of interest: Mr. Cornelisse has nothing to disclose.
Conflict of interest: Dr. Harbajan has nothing to disclose.
Conflict of interest: Dr. Distler reports personal fees from Amgen, personal fees from Abbvie, personal fees from Acceleron Pharma, personal fees from AnaMar, personal fees from Actelion, personal fees from Alexion, personal fees from Arxx Therapeutics, personal fees from Baecon Discovery, personal fees from Blade Therapeutics, grants and personal fees from Bayer, grants and personal fees from Boehringer Ingelheim, personal fees from Catenion, personal fees from Competitive Drug Development International Ltd, personal fees from Corbuspharma, personal fees from CSL Behring, personal fees from ChemomAb, personal fees from Horizon Pharmaceuticals, personal fees from Ergonex, personal fees from Galapagos NV, personal fees from Glenmark Pharmaceuticals, personal fees from GSK, personal fees from Inventiva, personal fees from Italfarmaco, personal fees from iQone, personal fees from iQvia, personal fees from Kymera, personal fees from Lilly, personal fees from Medac, personal fees from Medscape, grants and personal fees from Mitsubishi Tanabe Pharma, personal fees from MSD, personal fees from Novartis, personal fees from Pfizer, personal fees from Roche, personal fees from Sanofi, personal fees from Target Bio Science, personal fees from UCB, outside the submitted work; In addition, Dr. Distler has a patent mir-29 for the treatment of systemic sclerosis issued to US8247389, EP2331143.
Conflict of interest: Dr. Rosenberg reports other from Actelion, Janssen, Johnson and Johnson, during the conduct of the study; other from Johnson and Johnson, outside the submitted work;.
Conflict of interest: Dr. Doelberg reports other from Actelion Pharmaceuticals Ltd, outside the submitted work;.
Conflict of interest: Dr. roux has nothing to disclose.
Conflict of interest: Dr. Nayler reports other from Idorsia Pharmaceuticals Ltd, outside the submitted work;.
Conflict of interest: Dr. Lawrie reports grants from British Heart Foundation, grants from Medical Research Council, grants, personal fees and other from Actelion Pharmaceuticals, grants and personal fees from GlaxoSmithKline, outside the submitted work;.
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- Received July 6, 2020.
- Accepted November 17, 2020.
- Copyright ©ERS 2020
