Detection of a combination of serum IgG and IgA antibodies against selected mycobacterial targets provides promising diagnostic signatures for active TB

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dc.contributor.authorAwoniyi, Dolapo O.en_ZA
dc.contributor.authorBaumann, Ralfen_ZA
dc.contributor.authorChegou, Novel N.en_ZA
dc.contributor.authorKriel, Belindaen_ZA
dc.contributor.authorJacobs, Ruschcaen_ZA
dc.contributor.authorKidd, Martinen_ZA
dc.contributor.authorLoxton, Andre G.en_ZA
dc.contributor.authorKaempfer, Susanneen_ZA
dc.contributor.authorSingh, Mahaviren_ZA
dc.contributor.authorWalzl, Gerharden_ZA
dc.date.accessioned2018-11-01T12:55:11Z
dc.date.available2018-11-01T12:55:11Z
dc.date.issued2017-03-24
dc.descriptionCITATION: Awoniyi, D. O., et al. 2017. Detection of a combination of serum IgG and IgA antibodies against selected mycobacterial targets provides promising diagnostic signatures for active TB. Oncotarget, 8(23):37525-37537, doi:10.18632/oncotarget.16401.
dc.descriptionThe original publication is available at http://www.oncotarget.com
dc.description.abstractENGLISH ABSTRACT: Immunoglobulin G (IgG) based tests for the diagnosis of active tuberculosis (TB) disease often show a lack of specificity in TB endemic regions, which is mainly due to a high background prevalence of LTBI. Here, we investigated the combined performance of the responses of different Ig classes to selected mycobacterial antigens in primary healthcare clinic attendees with signs and symptoms suggestive of TB. The sensitivity and specificity of IgA, IgG and/or IgM to LAM and 7 mycobacterial protein antigens (ESAT-6, Tpx, PstS1, AlaDH, MPT64, 16kDa and 19kDa) and 2 antigen combinations (TUB, TB-LTBI) in the plasma of 63 individuals who underwent diagnostic work-up for TB after presenting with symptoms and signs compatible with possible active TB were evaluated. Active TB was excluded in 42 individuals of whom 21 has LTBI whereas active TB was confirmed in 21 patients of whom 19 had a follow-up blood draw at the end of 6-month anti-TB treatment. The leading single serodiagnostic markers to differentiate between the presence or absence of active TB were anti-16 kDa IgA, anti-MPT64 IgA with sensitivity and specificity of 90%/90% and 95%/90%, respectively. The combined use of 3 or 4 antibodies further improved this performance to accuracies above 95%. After successful completion of anti-TB treatment at month 6, the levels of 16 kDa IgA and 16 kDa IgM dropped significantly whereas LAM IgG and TB-LTBI IgG increased. These results show the potential of extending investigation of anti-tuberculous IgG responses to include IgM and IgA responses against selected protein and non-protein antigens in differentiating active TB from other respiratory diseases in TB endemic settings.en_ZA
dc.description.urihttp://www.oncotarget.com/index.php?journal=oncotarget&page=article&op=view&path[]=16401&path[]=52484
dc.description.versionPublisher's version
dc.format.extent13 pages : illustrationsen_ZA
dc.identifier.citationAwoniyi, D. O., et al. 2017. Detection of a combination of serum IgG and IgA antibodies against selected mycobacterial targets provides promising diagnostic signatures for active TB. Oncotarget, 8(23):37525-37537, doi:10.18632/oncotarget.16401
dc.identifier.issn1949-2553 (online)
dc.identifier.otherdoi:10.18632/oncotarget.16401
dc.identifier.urihttp://hdl.handle.net/10019.1/104634
dc.language.isoen_ZAen_ZA
dc.publisherImpact Journals
dc.rights.holderAuthors retain copyright
dc.subjectAntibodiesen_ZA
dc.subjectTuberculosis -- Diagnosisen_ZA
dc.subjectBiochemical markersen_ZA
dc.subjectMycobacterial diseasesen_ZA
dc.titleDetection of a combination of serum IgG and IgA antibodies against selected mycobacterial targets provides promising diagnostic signatures for active TBen_ZA
dc.typeArticleen_ZA
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