Journal
OCULAR IMMUNOLOGY AND INFLAMMATION
Volume 29, Issue 7-8, Pages 1480-1488Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/09273948.2020.1763404
Keywords
Host biomarkers; quantiferon supernatants; diagnosis; ocular tuberculosis; candidate biosignatures
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Funding
- South African government through a South African National Research Foundation (NRF) South African Research Chair Initiative (SARChI) grant: Biomarkers for TB [86535]
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The study evaluated potential host biomarkers in QuantiFERON supernatants for diagnosing ocular tuberculosis (OTB), and identified differences in biomarker concentrations between OTB and non-OTB patients, as well as a biosignature of four markers that could diagnose OTB with high specificity and moderate sensitivity.
Purpose To evaluate potential host biomarkers detectable in QuantiFERON supernatants as diagnostic candidates for ocular tuberculosis (OTB). Methods We investigated 47 host markers in QuantiFERON supernatants from 92 individuals with uveitis using the Luminex platform. We evaluated the potential of individual and combined biomarkers to distinguish between patients with possible, probable, and no OTB. Results Differences were observed in median concentrations of several biomarkers including IL-13, IFN-gamma, IFN-alpha 2, and IL-1 beta, in individuals with OTB versus no OTB regardless of HIV status. Individuals with probable and possible OTB only differed regarding GM-CSF. We identified a four-marker biosignature (CD40 L, IL-33, IFN-gamma, and SAP) which diagnosed OTB with an area under the ROC curve of 0.80, sensitivity = 56.3% and specificity = 90.0%. Conclusion This represents the first attempt at screening QuantiFERON supernatants for biomarkers to diagnose OTB. We identified candidate biosignatures which may aid in diagnosing OTB in both HIV positive and negative patients.
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