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Mamishi S, Pourakbari B, Hosseinpour Sadeghi R, Marjani M, Mahmoudi S. Diagnostic accuracy of the IFN-γ release assay using RD1 immunodominant T-cell antigens for diagnosis of extrapulmonary tuberculosis. FEMS Microbiol Lett 2024; 371:fnae023. [PMID: 38533666 DOI: 10.1093/femsle/fnae023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/13/2024] [Accepted: 03/22/2024] [Indexed: 03/28/2024] Open
Abstract
The diagnosis of extrapulmonary tuberculosis (EPTB) poses a significant challenge, with controversies surrounding the accuracy of IFN-γ release assays (IGRAs). This study aimed to assess the diagnostic accuracy of RD1 immunodominant T-cell antigens, including ESAT-6, CFP-10, PE35, and PPE68 proteins, for immunodiagnosis of EPTB. Twenty-nine patients with EPTB were enrolled, and recombinant PE35, PPE68, ESAT-6, and CFP-10 proteins were evaluated in a 3-day Whole Blood Assay. IFN-γ levels were measured using a Human IFN-γ ELISA kit, and the QuantiFERON-TB Gold Plus (QFT-Plus) test was performed. Predominantly, the patients were of Afghan (62%, n = 18) and Iranian (38%, n = 11) nationalities. Eighteen individuals tested positive for QFT-Plus, accounting for 62% of the cases. The positivity rate for IGRA, using each distinct recombinant protein (ESAT-6, PPE68, PE35, and CFP-10), was 72% (n = 21) for every protein tested. Specifically, among Afghan patients, the positivity rates for QFT-Plus and IGRA using ESAT-6, PPE68, PE35, and CFP-10 were 66.7%, 83.3%, 83.3%, 77.8%, and 88.9%, respectively. In contrast, among Iranian patients, the positivity rates for the same antigens were 54.5%, 54.5%, 54.5%, 63.6%, and 45.5%, respectively. In conclusion, our study highlights the potential of IGRA testing utilizing various proteins as a valuable diagnostic tool for EPTB. Further research is needed to elucidate the underlying factors contributing to these disparities and to optimize diagnostic strategies for EPTB in diverse populations.
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Affiliation(s)
- Setareh Mamishi
- Pediatric Infectious Disease Research Center, Tehran University of Medical Sciences, Dr. Gharib Street, Keshavarz Boulevard, Tehran, Iran
- Department of Infectious Diseases, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Dr. Ghaet, Keshavarz Boulevard, Tehran, Iran
| | - Babak Pourakbari
- Pediatric Infectious Disease Research Center, Tehran University of Medical Sciences, Dr. Gharib Street, Keshavarz Boulevard, Tehran, Iran
| | - Reihaneh Hosseinpour Sadeghi
- Pediatric Infectious Disease Research Center, Tehran University of Medical Sciences, Dr. Gharib Street, Keshavarz Boulevard, Tehran, Iran
| | - Majid Marjani
- Clinical Tuberculosis and Epidemiology Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran 1956944413, Iran
| | - Shima Mahmoudi
- Biotechnology Centre, Silesian University of Technology, 44-100 Gliwice, Poland
- Tehran University of Medical Sciences, Tehran, Iran
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Suárez I, Rohr S, Stecher M, Lehmann C, Winter S, Jung N, Priesner V, Berger M, Wyen C, Augustin M, Malin JJ, Fischer J, Horn C, Neuhann F, Püsken M, Plum G, Fätkenheuer G, Rybniker J. Plasma interferon-γ-inducible protein 10 (IP-10) levels correlate with disease severity and paradoxical reactions in extrapulmonary tuberculosis. Infection 2020; 49:437-445. [PMID: 33140838 PMCID: PMC7605464 DOI: 10.1007/s15010-020-01541-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 10/21/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND With 1.5 million deaths worldwide in 2018, tuberculosis (TB) remains a major global public health problem. While pulmonary TB (PTB) is the most common manifestation, the proportion of extrapulmonary TB (EPTB) is increasing in low-burden countries. EPTB is a heterogeneous disease entity posing diagnostic and management challenges due to the lack of reliable biomarkers. In this study, we prospectively evaluated clinical data and treatment response which were correlated with different biomarkers. METHODS The study was conducted at the University Hospital of Cologne. 20 patients with EPTB were enrolled. We analyzed plasma interferon-γ-inducible protein 10 (IP-10) levels in plasma by ELISA for up to 12 months of treatment. In addition, the QuantiFERON®-TB Gold Plus (QFT® Plus) test was performed during the course of treatment. Clinical data were assessed prospectively and correlated with QFT® Plus and IP-10 levels. RESULTS Plasma IP-10 levels were found to be significantly increased (p < 0.001) in patients with extensive disease compared to patients with limited disease (cervical lymph node TB) or healthy controls. In patients with clinically confirmed paradoxical reaction (PR), a further increase of IP-10 was noted. IFN-γ measured by the QFT® Plus test did not decrease significantly during the course of treatment. Of note, in four EPTB patients (20%) without radiographic pulmonary involvement, sputum culture was positive for Mycobacterium tuberculosis. CONCLUSION Our data demonstrate that IP-10 may be a valuable biomarker for estimation of disease severity in EPTB and monitoring of the disease course in extensive forms. However, IP-10 may be less suitable for diagnosis and monitoring of EPTB patients with limited disease. The QFT® Plus test does not appear to be a suitable marker for therapy monitoring. Sputum should be examined in EPTB patients even in case of normal diagnostic imaging of the chest.
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Affiliation(s)
- Isabelle Suárez
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Samuel Rohr
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany
| | - Melanie Stecher
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Clara Lehmann
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Sandra Winter
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Norma Jung
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Vanessa Priesner
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Melanie Berger
- Department of Pneumology and Critical Care Medicine, Cologne-Merheim Hospital, Kliniken Der Stadt Köln GmbH, Witten/Herdecke University Hospital, Ostmerheimer Strasse 200, 51109, Cologne, Germany
| | - Christoph Wyen
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,Praxis Am Ebertplatz, Cologne, Germany
| | - Max Augustin
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Jakob J Malin
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Julia Fischer
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Carola Horn
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Florian Neuhann
- Levy Mwanawasa Medical University (LMMU), Lusaka, Zambia.,Institute of Global Health, University Hospital Heidelberg, Heidelberg, Germany.,Municipal Health Authority Cologne, Cologne, Germany
| | - Michael Püsken
- Institute of Diagnostic and Interventional Radiology, University Hospital of Cologne, Cologne, Germany
| | - Georg Plum
- Institute for Medical Microbiology, Immunology and Hygiene, University Hospital of Cologne, Cologne, Germany
| | - Gerd Fätkenheuer
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Jan Rybniker
- Division of Infectious Diseases, Department I of Internal Medicine, University Hospital of Cologne, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany. .,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany. .,Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany.
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