Data-independent acquisition mass spectrometry in severe rheumatic heart disease (RHD) identifies a proteomic signature showing ongoing inflammation and effectively classifying RHD cases
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Published:2022-03-22
Issue:1
Volume:19
Page:
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ISSN:1542-6416
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Container-title:Clinical Proteomics
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language:en
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Short-container-title:Clin Proteom
Author:
Salie M. Taariq, Yang Jing, Ramírez Medina Carlos R., Zühlke Liesl J., Chishala Chishala, Ntsekhe Mpiko, Gitura Bernard, Ogendo Stephen, Okello Emmy, Lwabi Peter, Musuku John, Mtaja Agnes, Hugo-Hamman Christopher, El-Sayed Ahmed, Damasceno Albertino, Mocumbi Ana, Bode-Thomas Fidelia, Yilgwan Christopher, Amusa Ganiyu A., Nkereuwem Esin, Shaboodien Gasnat, Da Silva Rachael, Lee Dave Chi Hoo, Frain Simon, Geifman Nophar, Whetton Anthony D., Keavney Bernard, Engel Mark E.ORCID,
Abstract
AbstractBackgroundRheumatic heart disease (RHD) remains a major source of morbidity and mortality in developing countries. A deeper insight into the pathogenetic mechanisms underlying RHD could provide opportunities for drug repurposing, guide recommendations for secondary penicillin prophylaxis, and/or inform development of near-patient diagnostics.MethodsWe performed quantitative proteomics using Sequential Windowed Acquisition of All Theoretical Fragment Ion Mass Spectrometry (SWATH-MS) to screen protein expression in 215 African patients with severe RHD, and 230 controls. We applied a machine learning (ML) approach to feature selection among the 366 proteins quantifiable in at least 40% of samples, using the Boruta wrapper algorithm. The case–control differences and contribution to Area Under the Receiver Operating Curve (AUC) for each of the 56 proteins identified by the Boruta algorithm were calculated by Logistic Regression adjusted for age, sex and BMI. Biological pathways and functions enriched for proteins were identified using ClueGo pathway analyses.ResultsAdiponectin, complement component C7 and fibulin-1, a component of heart valve matrix, were significantly higher in cases when compared with controls. Ficolin-3, a protein with calcium-independent lectin activity that activates the complement pathway, was lower in cases than controls. The top six biomarkers from the Boruta analyses conferred an AUC of 0.90 indicating excellent discriminatory capacity between RHD cases and controls.ConclusionsThese results support the presence of an ongoing inflammatory response in RHD, at a time when severe valve disease has developed, and distant from previous episodes of acute rheumatic fever. This biomarker signature could have potential utility in recognizing different degrees of ongoing inflammation in RHD patients, which may, in turn, be related to prognostic severity.
Funder
Wellcome Trust South African National Research Foundation American Heart Association Newton Fund UK Medical Research Council
Publisher
Springer Science and Business Media LLC
Subject
Clinical Biochemistry,Molecular Biology,Molecular Medicine,Microbiology
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