Identification of T-Cell Antigens Specific for Latent Mycobacterium Tuberculosis Infection
Open Access
- 18 May 2009
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 4 (5), e5590
- https://doi.org/10.1371/journal.pone.0005590
Abstract
T-cell responses against dormancy-, resuscitation-, and reactivation-associated antigens of Mycobacterium tuberculosis are candidate biomarkers of latent infection in humans. We established an assay based on two rounds of in vitro restimulation and intracellular cytokine analysis that detects T-cell responses to antigens expressed during latent M. tuberculosis infection. Comparison between active pulmonary tuberculosis (TB) patients and healthy latently M. tuberculosis-infected donors (LTBI) revealed significantly higher T-cell responses against 7 of 35 tested M. tuberculosis latency-associated antigens in LTBI. Notably, T cells specific for Rv3407 were exclusively detected in LTBI but not in TB patients. The T-cell IFNγ response against Rv3407 in individual donors was the most influential factor in discrimination analysis that classified TB patients and LTBI with 83% accuracy using cross-validation. Rv3407 peptide pool stimulations revealed distinct candidate epitopes in four LTBI. Our findings further support the hypothesis that the latency-associated antigens can be exploited as biomarkers for LTBI.This publication has 30 references indexed in Scilit:
- Mycobacterium tuberculosis-specific CD4+, IFNγ+, and TNFα+ multifunctional memory T cells coexpress GM-CSFCytokine, 2008
- The resuscitation‐promoting factors of Mycobacterium tuberculosis are required for virulence and resuscitation from dormancy but are collectively dispensable for growth in vitroMolecular Microbiology, 2007
- Poor correlation between BCG vaccination-induced T cell responses and protection against tuberculosisProceedings of the National Academy of Sciences of the United States of America, 2007
- Discrepancy between Mycobacterium tuberculosis -Specific Gamma Interferon Release Assays Using Short and Prolonged In Vitro IncubationClinical and Vaccine Immunology, 2007
- Life and death in peripheral T cellsNature Reviews Immunology, 2007
- Multifunctional TH1 cells define a correlate of vaccine-mediated protection against Leishmania majorNature Medicine, 2007
- Extended Culture Enhances Sensitivity of a Gamma Interferon Assay for Latent Mycobacterium tuberculosis InfectionClinical and Vaccine Immunology, 2007
- Immunogenicity of Eight Dormancy Regulon-Encoded Proteins of Mycobacterium tuberculosis in DNA-Vaccinated and Tuberculosis-Infected MiceInfection and Immunity, 2007
- Immune markers measured before treatment predict outcome of intensive phase tuberculosis therapyClinical and Experimental Immunology, 2006
- Culturability of Mycobacterium tuberculosis cells isolated from murine macrophages: a bacterial growth factor promotes recoveryFEMS Immunology & Medical Microbiology, 2000