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Comprehensive plasma proteomic profiling reveals biomarkers for active tuberculosis

Garay-Baquero, Diana J., White, Cory H., Walker, Naomi ORCID:, Tebruegge, Marc, Schiff, Hannah F., Ugarte-Gil, Cesar, Morris-Jones, Stephen, Marshall, Ben G., Manousopoulou, Antigoni, Adamson, John H., Vallejo, Andres F., Bielecka, Magdalena K., Wilkinson, Robert J., Tezera, Liku B., Woelk, Christopher H., Garbis, Spiros D. and Elkington, Paul (2020) 'Comprehensive plasma proteomic profiling reveals biomarkers for active tuberculosis'. JCI insight, Vol 5, Issue 18, e13742.

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Tuberculosis (TB) kills more people than any other infection and new diagnostic tests to identify active cases are urgently required. We aimed to discover and verify novel markers for TB in non-depleted plasma.

We applied an optimised quantitative proteomics discovery methodology based on multidimensional and orthogonal liquid chromatographic separation hyphenated with high-resolution mass spectrometry (q3D LC-MS) to study non-depleted plasma of 11 patients with active TB compared to 10 healthy control donors. Prioritised candidates were verified in an independent UK-based (n=118) and a South African cohorts (n=203).

We generated the most comprehensive TB plasma proteome to date, profiling 5022 proteins spanning 11 orders-of-magnitude concentration range with diverse biochemical and molecular properties. We further analysed the predominantly low molecular weight sub-proteome; identifying 46 proteins with significantly increased and 90 with decreased abundance (peptide FDR ≤1%, q-value ≤0.05). Biological network analysis showed regulation of new pathways involving lipid and organophosphate ester transport. Verification was performed for novel candidate biomarkers (CFHR5, ILF2) in two independent cohorts. These proteins were elevated in both TB and other respiratory diseases (ORD). Receiver-operating-characteristics analyses using a 5-protein panel (CFHR5, LRG1, CRP, LBP and SAA1) exhibited discriminatory power in distinguishing between TB and ORD (AUC =0.81).

We report the most comprehensive TB plasma proteome to date, identifying numerous novel markers with verification in two independent cohorts, which led to a 5-protein biosignature with potential to improve TB diagnosis. With further development, these biomarkers have potential as a diagnostic triage test.

Colombia: Colciencias. UK: Medical Research Council, Innovate UK, National Institute for Health Research, Academy of Medical Sciences. Peru: Program for Advanced Research Capacities for AIDS. South Africa: Wellcome Centre for Infectious Diseases Research.

Item Type: Article
Subjects: WF Respiratory System > Tuberculosis > WF 200 Tuberculosis (General)
WF Respiratory System > Tuberculosis > WF 220 Diagnosis. Prognosis
WF Respiratory System > Tuberculosis > WF 250 Immunological aspects
Faculty: Department: Clinical Sciences & International Health > Clinical Sciences Department
Digital Object Identifer (DOI):
Depositing User: Stacy Murtagh
Date Deposited: 14 Aug 2020 09:15
Last Modified: 29 Oct 2020 12:02


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