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Barnacle JR, Davis AG, Wilkinson RJ. Recent advances in understanding the human host immune response in tuberculous meningitis. Front Immunol 2024; 14:1326651. [PMID: 38264653 PMCID: PMC10803428 DOI: 10.3389/fimmu.2023.1326651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 12/18/2023] [Indexed: 01/25/2024] Open
Abstract
Tuberculous meningitis (TBM), the most severe form of tuberculosis, causes death in approximately 25% cases despite antibiotic therapy, and half of survivors are left with neurological disability. Mortality and morbidity are contributed to by a dysregulated immune response, and adjunctive host-directed therapies are required to modulate this response and improve outcomes. Developing such therapies relies on improved understanding of the host immune response to TBM. The historical challenges in TBM research of limited in vivo and in vitro models have been partially overcome by recent developments in proteomics, transcriptomics, and metabolomics, and the use of these technologies in nested substudies of large clinical trials. We review the current understanding of the human immune response in TBM. We begin with M. tuberculosis entry into the central nervous system (CNS), microglial infection and blood-brain and other CNS barrier dysfunction. We then outline the innate response, including the early cytokine response, role of canonical and non-canonical inflammasomes, eicosanoids and specialised pro-resolving mediators. Next, we review the adaptive response including T cells, microRNAs and B cells, followed by the role of the glutamate-GABA neurotransmitter cycle and the tryptophan pathway. We discuss host genetic immune factors, differences between adults and children, paradoxical reaction, and the impact of HIV-1 co-infection including immune reconstitution inflammatory syndrome. Promising immunomodulatory therapies, research gaps, ongoing challenges and future paths are discussed.
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Affiliation(s)
- James R. Barnacle
- The Francis Crick Institute, London, United Kingdom
- Department of Infectious Disease, Imperial College, London, United Kingdom
- Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, South Africa
| | - Angharad G. Davis
- The Francis Crick Institute, London, United Kingdom
- Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, South Africa
| | - Robert J. Wilkinson
- The Francis Crick Institute, London, United Kingdom
- Department of Infectious Disease, Imperial College, London, United Kingdom
- Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, South Africa
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2
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Aleynick M, Svensson-Arvelund J, Pantsulaia G, Kim K, Rose SA, Upadhyay R, Yellin M, Marsh H, Oreper D, Jhunjhunwala S, Moussion CC, Merad M, Brown BD, Brody JD. Pattern recognition receptor agonists in pathogen vaccines mediate antitumor T-cell cross-priming. J Immunother Cancer 2023; 11:e007198. [PMID: 37487664 PMCID: PMC10373699 DOI: 10.1136/jitc-2023-007198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2023] [Indexed: 07/26/2023] Open
Abstract
BACKGROUND Cancer immunotherapies are generally effective in patients whose tumors contain a priori primed T-cells reactive to tumor antigens (TA). One approach to prime TA-reactive T-cells is to administer immunostimulatory molecules, cells, or pathogens directly to the tumor site, that is, in situ vaccination (ISV). We recently described an ISV using Flt3L to expand and recruit dendritic cells (DC), radiotherapy to load DC with TA, and pattern recognition receptor agonists (PRRa) to activate TA-loaded DC. While ISV trials using synthetic PRRa have yielded systemic tumor regressions, the optimal method to activate DCs is unknown. METHODS To discover optimal DC activators and increase access to clinical grade reagents, we assessed whether viral or bacterial components found in common pathogen vaccines are an effective source of natural PRRa (naPRRa). Using deep profiling (155-metric) of naPRRa immunomodulatory effects and gene editing of specific PRR, we defined specific signatures and molecular mechanisms by which naPRRa potentiate T-cell priming. RESULTS We observed that vaccine naPRRa can be even more potent in activating Flt3L-expanded murine and human DCs than synthetic PRRa, promoting cross-priming of TA-reactive T-cells. We developed a mechanistically diverse naPRRa combination (BCG, PedvaxHIB, Rabies) and noted more potent T-cell cross-priming than with any single naPRRa. The naPRRa triplet-as part of Flt3L-primed ISV-induced greater intratumoral CD8 T-cell infiltration, T-cells reactive to a newly defined tumorous neoantigen, durable tumor regressions. CONCLUSIONS This work provides rationale for the translation of pathogen vaccines as FDA-approved clinical-grade DC activators which could be exploited as immune-stimulants for early phase trials.
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Affiliation(s)
- Mark Aleynick
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Marc and Jennifer Lipschultz Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Judit Svensson-Arvelund
- Marc and Jennifer Lipschultz Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Gvantsa Pantsulaia
- Marc and Jennifer Lipschultz Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Kristy Kim
- Marc and Jennifer Lipschultz Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Samuel A Rose
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Marc and Jennifer Lipschultz Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Ranjan Upadhyay
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Marc and Jennifer Lipschultz Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | - Henry Marsh
- Celldex Therapeutics Inc, Hampton, New Jersey, USA
| | | | | | | | - Miriam Merad
- Marc and Jennifer Lipschultz Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Brian D Brown
- Marc and Jennifer Lipschultz Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Joshua D Brody
- Marc and Jennifer Lipschultz Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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3
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Pinpathomrat N, Bull N, Pasricha J, Harrington-Kandt R, McShane H, Stylianou E. Using an effective TB vaccination regimen to identify immune responses associated with protection in the murine model. Vaccine 2021; 39:1452-1462. [PMID: 33549390 PMCID: PMC7903242 DOI: 10.1016/j.vaccine.2021.01.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 10/08/2020] [Accepted: 01/12/2021] [Indexed: 01/11/2023]
Abstract
Boosting BCG with ChAdOx1.85A and MVA85A (B-C-M) improves its protective efficacy. B-C-M induces pulmonary and systemic Ag85A-specific cytokine and antibody responses. B-C-M enhances resident memory CD4+ and CD8+ T cells in the lung parenchyma. Protection associated with lung parenchymal Ag85A-specific CD4+ CXCR3+ KLRG1- T cells.
A vaccine against tuberculosis (TB), a disease resulting from infection with Mycobacterium tuberculosis (M.tb), is urgently needed to prevent more than a million deaths per year. Bacillus Calmette–Guérin (BCG) is the only available vaccine against TB but its efficacy varies throughout the world. Subunit vaccine candidates, based on recombinant viral vectors expressing mycobacterial antigens, are one of the strategies being developed to boost BCG-primed host immune responses and efficacy. A promising vaccination regimen composed of intradermal (i.d.) BCG prime, followed by intranasally (i.n.) administered chimpanzee adenoviral vector (ChAdOx1) and i.n. or i.d. modified vaccinia Ankara virus (MVA), both expressing Ag85A, has been previously reported to significantly improve BCG efficacy in mice. Effector and memory immune responses induced by BCG-ChAdOx1.85A-MVA85A (B-C-M), were evaluated to identify immune correlates of protection in mice. This protective regime induced strong Ag85A-specific cytokine responses in CD4+ and CD8+ T cells, both in the systemic and pulmonary compartments. Lung parenchymal CXCR3+ KLRG1- Ag85A-specific memory CD4+ T cells were significantly increased in B-C-M compared to BCG immunised mice at 4, 8 and 20 weeks post vaccination, but the number of these cells decreased at the latter time point. This cell population was associated with the protective efficacy of this regime and may have an important protective role against M.tb infection.
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Affiliation(s)
- Nawamin Pinpathomrat
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, United Kingdom
| | - Naomi Bull
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, United Kingdom
| | - Janet Pasricha
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, United Kingdom
| | - Rachel Harrington-Kandt
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, United Kingdom
| | - Helen McShane
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, United Kingdom
| | - Elena Stylianou
- The Jenner Institute, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, United Kingdom.
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Estévez O, Anibarro L, Garet E, Martínez A, Pena A, Barcia L, Peleteiro M, González-Fernández Á. Multi-parameter flow cytometry immunophenotyping distinguishes different stages of tuberculosis infection. J Infect 2020; 81:57-71. [PMID: 32330526 DOI: 10.1016/j.jinf.2020.03.064] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 03/20/2020] [Accepted: 03/24/2020] [Indexed: 12/19/2022]
Abstract
OBJECTIVES To identify new potential host biomarkers in blood to discriminate between active TB patients, uninfected (NoTBI) and latently infected contacts (LTBI). METHODS A blood cell count was performed to study parent leukocyte populations. Peripheral blood mononuclear cells (PBMCs) were isolated and a multi-parameter flow cytometry assay was conducted to study the distribution of basal and Mycobacterium tuberculosis (Mtb)-stimulated lymphocytes. Differences between groups and the area under the ROC curve (AUC) were investigated to assess the diagnostic accuracy. RESULTS Active TB patients presented higher Monocyte-to-lymphocyte and Neutrophil-to-lymphocyte ratios than LTBI and NoTBI contacts (p<0.0001; AUC>0.8). Lymphocyte subsets with differences (p >0.05; AUC >0.7) between active TB and both contact groups include the basal distribution of Th1/Th2 ratio, Th1-Th17, CD4+ Central Memory (TCM) or MAIT cells. Expression of CD154 is increased in Mtb-activated CD4+ TCM and Effector Memory T cells in active TB and LTBI compared to NoTBI. In CD4+T cells, expression of CD154 showed a higher accuracy than IFNγ to discriminate Mtb-specific activation. CONCLUSIONS We identified different cell subsets with potential use in tuberculosis diagnosis. Among them, distribution of CD4 TCM cells and their expression of CD154 after Mtb-activation are the most promising candidates.
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Affiliation(s)
- Olivia Estévez
- CINBIO, Universidade de Vigo, Immunology Group, Campus universitario Lagoas, Marcosende, 36310 Vigo, Spain; Instituto de Investigación Sanitaria Galicia Sur (IIS-GS), Spain
| | - Luis Anibarro
- Instituto de Investigación Sanitaria Galicia Sur (IIS-GS), Spain; GEIM -Grupo de Estudio de Micobacterias de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica, Spain; Tuberculosis Unit, Department of Infectious Diseases and Internal Medicine, Pontevedra Hospital Complex, Pontevedra, Spain
| | - Elina Garet
- CINBIO, Universidade de Vigo, Immunology Group, Campus universitario Lagoas, Marcosende, 36310 Vigo, Spain; Instituto de Investigación Sanitaria Galicia Sur (IIS-GS), Spain
| | - Amparo Martínez
- CINBIO, Universidade de Vigo, Immunology Group, Campus universitario Lagoas, Marcosende, 36310 Vigo, Spain; Instituto de Investigación Sanitaria Galicia Sur (IIS-GS), Spain
| | - Alberto Pena
- Instituto de Investigación Sanitaria Galicia Sur (IIS-GS), Spain; Tuberculosis Unit, Department of Infectious Diseases and Internal Medicine, Pontevedra Hospital Complex, Pontevedra, Spain
| | - Laura Barcia
- Instituto de Investigación Sanitaria Galicia Sur (IIS-GS), Spain; Tuberculosis Unit, Department of Infectious Diseases and Internal Medicine, Pontevedra Hospital Complex, Pontevedra, Spain
| | - Mercedes Peleteiro
- CINBIO, Universidade de Vigo, Flow Cytometry Core Facility, Campus universitario Lagoas, Marcosende, 36310 Vigo, Spain
| | - África González-Fernández
- CINBIO, Universidade de Vigo, Immunology Group, Campus universitario Lagoas, Marcosende, 36310 Vigo, Spain; Instituto de Investigación Sanitaria Galicia Sur (IIS-GS), Spain.
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La Manna MP, Orlando V, Prezzemolo T, Di Carlo P, Cascio A, Delogu G, Poli G, Sullivan LC, Brooks AG, Dieli F, Caccamo N. HLA-E-restricted CD8 + T Lymphocytes Efficiently Control Mycobacterium tuberculosis and HIV-1 Coinfection. Am J Respir Cell Mol Biol 2020; 62:430-439. [PMID: 31697586 DOI: 10.1165/rcmb.2019-0261oc] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 11/07/2019] [Indexed: 12/25/2022] Open
Abstract
We investigated the contribution of human leukocyte antigen A2 (HLA-A2) and HLA-E-restricted CD8+ T cells in patients with Mycobacterium tuberculosis and human immunodeficiency virus 1 (HIV-1) coinfection. HIV-1 downregulates HLA-A, -B, and -C molecules in infected cells, thus influencing recognition by HLA class I-restricted CD8+ T cells but not by HLA-E-restricted CD8+ T cells, owing to the inability of the virus to downmodulate their expression. Therefore, antigen-specific HLA-E-restricted CD8+ T cells could play a protective role in Mycobacterium tuberculosis and HIV-1 coinfection. HLA-E- and HLA-A2-restricted Mycobacterium tuberculosis-specific CD8+ T cells were tested in vitro for cytotoxic and microbicidal activities, and their frequencies and phenotypes were evaluated ex vivo in patients with active tuberculosis and concomitant HIV-1 infection. HIV-1 and Mycobacterium tuberculosis coinfection caused downmodulation of HLA-A2 expression in human monocyte-derived macrophages associated with resistance to lysis by HLA-A2-restricted CD8+ T cells and failure to restrict the growth of intracellular Mycobacterium tuberculosis. Conversely, HLA-E surface expression and HLA-E-restricted cytolytic and microbicidal CD8 responses were not affected. HLA-E-restricted and Mycobacterium tuberculosis-specific CD8+ T cells were expanded in the circulation of patients with Mycobacterium tuberculosis/HIV-1 coinfection, as measured by tetramer staining, but displayed a terminally differentiated and exhausted phenotype that was rescued in vitro by anti-PD-1 (programmed cell death protein 1) monoclonal antibody. Together, these results indicate that HLA-E-restricted and Mycobacterium tuberculosis-specific CD8+ T cells in patients with Mycobacterium tuberculosis/HIV-1 coinfection have an exhausted phenotype and fail to expand in vitro in response to antigen stimulation, which can be restored by blocking the PD-1 pathway using the specific monoclonal antibody nivolumab.
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Affiliation(s)
- Marco Pio La Manna
- Central Laboratory for Advanced Diagnosis and Biomedical Research
- Department of Biomedicine, Neuroscience and Advanced Diagnostics, and
| | - Valentina Orlando
- Central Laboratory for Advanced Diagnosis and Biomedical Research
- Department of Biomedicine, Neuroscience and Advanced Diagnostics, and
| | - Teresa Prezzemolo
- Central Laboratory for Advanced Diagnosis and Biomedical Research
- Department of Biomedicine, Neuroscience and Advanced Diagnostics, and
| | - Paola Di Carlo
- Department of Sciences for Health Promotion and Mother-Child Care "G. D'Alessandro," University of Palermo, Palermo, Italy
| | - Antonio Cascio
- Department of Sciences for Health Promotion and Mother-Child Care "G. D'Alessandro," University of Palermo, Palermo, Italy
| | - Giovanni Delogu
- Institute of Microbiology, Catholic University of the Sacred Heart, Rome, Italy
- Foundation Policlinico Universitario Gemelli, Institute for Scientific-based Care and Research (IRCCS) Rome, Italy
| | - Guido Poli
- AIDS Immunopathogenesis Unit, San Raffaele Scientific Institute, Milano, Italy
- Vita-Salute San Raffaele University School of Medicine, Milano, Italy; and
| | - Lucy C Sullivan
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Andrew G Brooks
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Francesco Dieli
- Central Laboratory for Advanced Diagnosis and Biomedical Research
- Department of Biomedicine, Neuroscience and Advanced Diagnostics, and
| | - Nadia Caccamo
- Central Laboratory for Advanced Diagnosis and Biomedical Research
- Department of Biomedicine, Neuroscience and Advanced Diagnostics, and
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6
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Yeo L, Pujol‐Autonell I, Baptista R, Eichmann M, Kronenberg‐Versteeg D, Heck S, Dolton G, Sewell AK, Härkönen T, Mikk M, Toppari J, Veijola R, Knip M, Ilonen J, Peakman M. Circulating β cell-specific CD8 + T cells restricted by high-risk HLA class I molecules show antigen experience in children with and at risk of type 1 diabetes. Clin Exp Immunol 2020; 199:263-277. [PMID: 31660582 PMCID: PMC7008222 DOI: 10.1111/cei.13391] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2019] [Indexed: 12/27/2022] Open
Abstract
In type 1 diabetes (T1D), autoreactive cytotoxic CD8+ T cells are implicated in the destruction of insulin-producing β cells. The HLA-B*3906 and HLA-A*2402 class I genes confer increased risk and promote early disease onset, suggesting that CD8+ T cells that recognize peptides presented by these class I molecules on pancreatic β cells play a pivotal role in the autoimmune response. We examined the frequency and phenotype of circulating preproinsulin (PPI)-specific and insulin B (InsB)-specific CD8+ T cells in HLA-B*3906+ children newly diagnosed with T1D and in high-risk HLA-A*2402+ children before the appearance of disease-specific autoantibodies and before diagnosis of T1D. Antigen-specific CD8+ T cells were detected using human leucocyte antigen (HLA) class I tetramers and flow cytometry was used to assess memory status. In HLA-B*3906+ children with T1D, we observed an increase in PPI5-12 -specific transitional memory CD8+ T cells compared to non-diabetic, age- and HLA-matched subjects. Furthermore, PPI5-12 -specific CD8+ T cells in HLA-B*3906+ children with T1D showed a significantly more antigen-experienced phenotype compared to polyclonal CD8+ T cells. In longitudinal samples from high-risk HLA-A*2402+ children, the percentage of terminal effector cells within the InsB15-24 -specific CD8+ T cells was increased before diagnosis relative to samples taken before the appearance of autoantibodies. This is the first study, to our knowledge, to report HLA-B*3906-restricted autoreactive CD8+ T cells in T1D. Collectively, our results provide evidence that β cell-reactive CD8+ T cells restricted by disease-associated HLA class I molecules display an antigen-experienced phenotype and acquire enhanced effector function during the period leading to clinical diagnosis, implicating these cells in driving disease.
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Affiliation(s)
- L. Yeo
- Department of ImmunobiologyFaculty of Life Sciences and MedicineKing’s College LondonLondonUK
- National Institute of Health Research Biomedical Research Centre at Guy’s and St Thomas’ Hospital and King’s College LondonLondonUK
| | - I. Pujol‐Autonell
- Department of ImmunobiologyFaculty of Life Sciences and MedicineKing’s College LondonLondonUK
| | - R. Baptista
- National Institute of Health Research Biomedical Research Centre at Guy’s and St Thomas’ Hospital and King’s College LondonLondonUK
| | - M. Eichmann
- Department of ImmunobiologyFaculty of Life Sciences and MedicineKing’s College LondonLondonUK
| | - D. Kronenberg‐Versteeg
- Department of ImmunobiologyFaculty of Life Sciences and MedicineKing’s College LondonLondonUK
| | - S. Heck
- National Institute of Health Research Biomedical Research Centre at Guy’s and St Thomas’ Hospital and King’s College LondonLondonUK
| | - G. Dolton
- Division of Infection and ImmunitySchool of Medicine and Systems Immunity Research InstituteCardiff UniversityCardiffUK
| | - A. K. Sewell
- Division of Infection and ImmunitySchool of Medicine and Systems Immunity Research InstituteCardiff UniversityCardiffUK
| | - T. Härkönen
- Research Program for Clinical and Molecular MetabolismFaculty of MedicineUniversity of HelsinkiHelsinkiFinland
| | - M.‐L. Mikk
- Immunogenetics LaboratoryInstitute of BiomedicineUniversity of TurkuTurkuFinland
| | - J. Toppari
- Department of PaediatricsUniversity of Turku and Turku University HospitalTurkuFinland
- Institute of BiomedicineResearch Centre for Integrative Physiology and PharmacologyUniversity of TurkuTurkuFinland
| | - R. Veijola
- Department of PaediatricsPEDEGO Research UnitMedical Research CentreOulu University Hospital and University of OuluOuluFinland
| | - M. Knip
- Research Program for Clinical and Molecular MetabolismFaculty of MedicineUniversity of HelsinkiHelsinkiFinland
- Children’s HospitalUniversity of Helsinki and Helsinki University HospitalHelsinkiFinland
- Department of PediatricsTampere University HospitalTampereFinland
- Folkhälsan Research CentreHelsinkiFinland
| | - J. Ilonen
- Immunogenetics LaboratoryInstitute of BiomedicineUniversity of TurkuTurkuFinland
- Clinical MicrobiologyTurku University HospitalTurkuFinland
| | - M. Peakman
- Department of ImmunobiologyFaculty of Life Sciences and MedicineKing’s College LondonLondonUK
- National Institute of Health Research Biomedical Research Centre at Guy’s and St Thomas’ Hospital and King’s College LondonLondonUK
- King’s Health Partners Institute of Diabetes, Endocrinology and ObesityLondonUK
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Abstract
Tuberculosis (TB) is a serious global public health challenge that results in significant morbidity and mortality worldwide. TB is caused by infection with the bacilli Mycobacterium tuberculosis (M. tuberculosis), which has evolved a wide variety of strategies in order to thrive within its host. Understanding the complex interactions between M. tuberculosis and host immunity can inform the rational design of better TB vaccines and therapeutics. This chapter covers innate and adaptive immunity against M. tuberculosis infection, including insights on bacterial immune evasion and subversion garnered from animal models of infection and human studies. In addition, this chapter discusses the immunology of the TB granuloma, TB diagnostics, and TB comorbidities. Finally, this chapter provides a broad overview of the current TB vaccine pipeline.
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Tomasicchio M, Davids M, Pooran A, Theron G, Smith L, Semple L, Meldau R, Hapgood JP, Dheda K. The Injectable Contraceptive Medroxyprogesterone Acetate Attenuates Mycobacterium tuberculosis-Specific Host Immunity Through the Glucocorticoid Receptor. J Infect Dis 2020; 219:1329-1337. [PMID: 30452655 PMCID: PMC6452311 DOI: 10.1093/infdis/jiy657] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 11/12/2018] [Indexed: 01/28/2023] Open
Abstract
Background The effects of the widely used progestin-only injectable contraceptives, medroxyprogesterone acetate (MPA) and norethisterone acetate (NET-A), on host susceptibility to Mycobacterium tuberculosis (Mtb) are unknown. Methods We recruited human immunodeficiency virus–uninfected females, not taking any contraceptives, from Cape Town, South Africa, to evaluate the effect of MPA, NET-A, and dexamethasone on Mtb containment in monocyte-derived macrophages co-incubated with purified protein derivative (PPD)–driven peripheral blood–derived effector cells. Results MPA (P < .005) and dexamethasone (P < .01), but not NET-A, significantly attenuated Mtb containment in Mtb-infected macrophages co-cultured with PPD-driven effector cells at physiologically relevant concentrations and in a dose-dependent manner. Antagonizing the glucocorticoid receptor with mifepristone (RU486) abrogated the reduction in Mtb containment. In PPD-stimulated peripheral blood mononuclear cells, MPA and dexamethasone, but not NET-A, upregulated (median [interquartile range]) regulatory T cells (5.3% [3.1%–18.2%]; P < .05), reduced CD4+ T-cell interferon-γ (21% [0.5%–28%]; P < .05) and granzyme B production (12.6% [7%–13.5%]; P < .05), and reduced CD8+ perforin activity (2.2% [0.1%–7%]; P < .05). RU486 reversed regulatory T-cell up-regulation and the inhibitory effect on Th1 and granzyme/perforin-related pathways. Conclusions MPA, but not NET-A, subverts mycobacterial containment in vitro and downregulates pathways associated with protective CD8+- and CD4+-related host immunity via the glucocorticoid receptor. These data potentially inform the selection and use of injectable contraceptives in tuberculosis-endemic countries.
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Affiliation(s)
- Michele Tomasicchio
- Centre for Lung Infection and Immunity, Division of Pulmonology and UCT Lung Institute, Department of Medicine, University of Cape Town
| | - Malika Davids
- Centre for Lung Infection and Immunity, Division of Pulmonology and UCT Lung Institute, Department of Medicine, University of Cape Town
| | - Anil Pooran
- Centre for Lung Infection and Immunity, Division of Pulmonology and UCT Lung Institute, Department of Medicine, University of Cape Town
| | - Grant Theron
- Centre for Lung Infection and Immunity, Division of Pulmonology and UCT Lung Institute, Department of Medicine, University of Cape Town.,Department of Science and Technology, National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Health Sciences, Stellenbosch University
| | - Liezel Smith
- Centre for Lung Infection and Immunity, Division of Pulmonology and UCT Lung Institute, Department of Medicine, University of Cape Town
| | - Lynn Semple
- Centre for Lung Infection and Immunity, Division of Pulmonology and UCT Lung Institute, Department of Medicine, University of Cape Town
| | - Richard Meldau
- Centre for Lung Infection and Immunity, Division of Pulmonology and UCT Lung Institute, Department of Medicine, University of Cape Town
| | - Janet Patricia Hapgood
- Department of Molecular and Cell Biology, University of Cape Town, South Africa.,Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, South Africa
| | - Keertan Dheda
- Centre for Lung Infection and Immunity, Division of Pulmonology and UCT Lung Institute, Department of Medicine, University of Cape Town.,Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, South Africa.,Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
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9
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van Laarhoven A, Dian S, van Dorp S, Purnama F, Koeken VACM, Diandini E, Utami F, Livia R, Apriani L, Ardiansyah E, Ter Horst R, Netea MG, Achmad TH, Hill PC, Ruslami R, Alisjahbana B, Ussher JE, Indrati A, Verrall A, Ganiem AR, van Crevel R. Immune cell characteristics and cytokine responses in adult HIV-negative tuberculous meningitis: an observational cohort study. Sci Rep 2019; 9:884. [PMID: 30696839 PMCID: PMC6351535 DOI: 10.1038/s41598-018-36696-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 11/22/2018] [Indexed: 11/09/2022] Open
Abstract
Immunopathology contributes to high mortality in tuberculous meningitis (TBM) but little is known about the blood and cerebrospinal fluid (CSF) immune response. We prospectively characterised the immune response of 160 TBM suspects in an Indonesian cohort, including 67 HIV-negative probable or definite TBM cases. TBM patients presented with severe disease and 38% died in 6 months. Blood from TBM patients analysed by flow cytometry showed lower αβT and γδT cells, NK cells and MAIT cells compared to 26 pulmonary tuberculosis patients (2.4-4-fold, all p < 0.05) and 27 healthy controls (2.7-7.6-fold, p < 0.001), but higher neutrophils and classical monocytes (2.3-3.0-fold, p < 0.001). CSF leukocyte activation was higher than in blood (1.8-9-fold). CSF of TBM patients showed a predominance of αβT and NK cells, associated with better survival. Cytokine production after ex-vivo stimulation of whole blood showed a much broader range in TBM compared to both control groups (p < 0.001). Among TBM patients, high ex-vivo production of TNF-α, IL-6 and IL-10 correlated with fever, lymphocyte count and monocyte HLA-DR expression (all p < 0.05). TBM patients show a strong myeloid blood response, with a broad variation in immune function. This may influence the response to adjuvant treatment and should be considered in future trials of host-directed therapy.
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Affiliation(s)
- Arjan van Laarhoven
- Radboud University Medical Center, Department of Internal Medicine and Radboud Center of Infectious Diseases (RCI), Nijmegen, The Netherlands. .,Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia.
| | - Sofiati Dian
- Radboud University Medical Center, Department of Internal Medicine and Radboud Center of Infectious Diseases (RCI), Nijmegen, The Netherlands.,Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia.,Universitas Padjadjaran, Department of Neurology, Faculty of Medicine/Hasan Sadikin Hospital, Bandung, Indonesia
| | - Suzanne van Dorp
- Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia.,Radboud University Medical Center, Department of Hematology, Nijmegen, The Netherlands
| | - Feby Purnama
- Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia
| | - Valerie A C M Koeken
- Radboud University Medical Center, Department of Internal Medicine and Radboud Center of Infectious Diseases (RCI), Nijmegen, The Netherlands.,Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia
| | - Emira Diandini
- Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia
| | - Fitria Utami
- Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia
| | - Resvi Livia
- Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia
| | - Lika Apriani
- Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia
| | - Edwin Ardiansyah
- Radboud University Medical Center, Department of Internal Medicine and Radboud Center of Infectious Diseases (RCI), Nijmegen, The Netherlands.,Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia
| | - Rob Ter Horst
- Radboud University Medical Center, Department of Internal Medicine and Radboud Center of Infectious Diseases (RCI), Nijmegen, The Netherlands
| | - Mihai G Netea
- Radboud University Medical Center, Department of Internal Medicine and Radboud Center of Infectious Diseases (RCI), Nijmegen, The Netherlands.,Human Genomics Laboratory, Craiova University of Medicine and Pharmacy, Craiova, Romania
| | - Tri Hanggono Achmad
- Universitas Padjadjaran, Department of Biochemistry, Faculty of Medicine, Bandung, Indonesia
| | - Philip C Hill
- Centre for International Health, Universityof Otago, Dunedin, New Zealand
| | - Rovina Ruslami
- Universitas Padjadjaran, Department of Pharmacology and Therapy, Faculty of Medicine, Bandung, Indonesia
| | - Bachti Alisjahbana
- Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia
| | - James E Ussher
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Agnes Indrati
- Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia
| | - Ayesha Verrall
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Ahmad Rizal Ganiem
- Universitas Padjadjaran, TB-HIV Research Center, Faculty of Medicine, Bandung, Indonesia.,Universitas Padjadjaran, Department of Neurology, Faculty of Medicine/Hasan Sadikin Hospital, Bandung, Indonesia
| | - Reinout van Crevel
- Radboud University Medical Center, Department of Internal Medicine and Radboud Center of Infectious Diseases (RCI), Nijmegen, The Netherlands
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10
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PD-1/PD-L1 Pathway Modulates Macrophage Susceptibility to Mycobacterium tuberculosis Specific CD8 + T cell Induced Death. Sci Rep 2019; 9:187. [PMID: 30655556 PMCID: PMC6336852 DOI: 10.1038/s41598-018-36403-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/19/2018] [Indexed: 02/06/2023] Open
Abstract
CD8+T cells contribute to tuberculosis (TB) infection control by inducing death of infected macrophages. Mycobacterium tuberculosis (Mtb) infection is associated with increased PD-1/PD-L1 expression and alternative activation of macrophages. We aimed to study the role of PD-1 pathway and macrophage polarization on Mtb-specific CD8+T cell-induced macrophage death. We observed that both PD-L1 on CD14+ cells and PD-1 on CD8+T cells were highly expressed at the site of infection in pleurisy TB patients’ effusion samples (PEMC). Moreover, a significant increase in CD8+T cells’ Mtb-specific degranulation from TB-PEMC vs. TB-PBMC was observed, which correlated with PD-1 and PDL-1 expression. In an in vitro model, M1 macrophages were more susceptible to Mtb-specific CD8+T cells’ cytotoxicity compared to M2a macrophages and involved the transfer of cytolytic effector molecules from CD8+T lymphocytes to target cells. Additionally, PD-L1 blocking significantly increased the in vitro Ag-specific CD8+T cell cytotoxicity against IFN-γ-activated macrophages but had no effect over cytotoxicity on IL-4 or IL-10-activated macrophages. Interestingly, PD-L1 blocking enhanced Mtb-specific CD8+ T cell killing of CD14+ cells from human tuberculous pleural effusion samples. Our data indicate that PD-1/PD-L1 pathway modulates antigen-specific cytotoxicity against M1 targets in-vitro and encourage the exploration of checkpoint blockade as new adjuvant for TB therapies.
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11
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Diagnostic performance in active TB of QFT-Plus assay and co-expression of CD25/CD134 in response to new antigens of Mycobacterium tuberculosis. Med Microbiol Immunol 2019; 208:171-183. [PMID: 30623240 DOI: 10.1007/s00430-018-00576-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 12/30/2018] [Indexed: 12/22/2022]
Abstract
The new QuantiFERON-TB Gold Plus employs modified peptides optimized to elicit an IFNγ response from CD8+ cytotoxic T lymphocytes in addition to CD4+ T cells. With a view to improve the difficult identification of TB cases, we assessed the combination of two specific immunological markers comprising IFNγ secretion and T cells co-expression of CD25 and CD134 in response to Mycobacterium tuberculosis-specific antigens. A total of 34 subjects with suspected TB and 10 age-matched HD were prospectively enrolled. Assessing the performance of QFT-Plus in terms of the TB1 and TB2 results, we found that in TB patients, the quantitative IFNγ value in TB2 was similar to that in TB1, and we did not find any differences irrespective of the disease (pulmonary or extra-pulmonary). The flow cytometric CD25/CD134 assay, allowed a more accurate differentiation between M. tuberculosis-infected and uninfected patients, with a better combination of sensitivity and specificity, especially by evaluation of CD4+ T-cell subset. All individuals with negative QFT-Plus results displayed a positive CD25/CD134 response. Overall, a positive correlation was found between T cells co-expressing CD25/CD134 and IFNγ levels in response to both QFT-Plus TB antigen tubes, as well as between the QFT-Plus TB1 and TB2 tubes. We demonstrated that both TB1 and TB2 induce a higher expression of CD25+CD134+ markers on CD4+ T cells among infected TB subjects, compared to the lower degree of CD8+ T cells, mainly induced to TB2 stimulation. We suggest that a combined use of classic QFT-Plus and specific CD25/CD134 response may be a useful means in the diagnostic workup for active TB.
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12
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Wilkinson RJ, Rohlwink U, Misra UK, van Crevel R, Mai NTH, Dooley KE, Caws M, Figaji A, Savic R, Solomons R, Thwaites GE. Tuberculous meningitis. Nat Rev Neurol 2017; 13:581-598. [PMID: 28884751 DOI: 10.1038/nrneurol.2017.120] [Citation(s) in RCA: 276] [Impact Index Per Article: 39.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Tuberculosis remains a global health problem, with an estimated 10.4 million cases and 1.8 million deaths resulting from the disease in 2015. The most lethal and disabling form of tuberculosis is tuberculous meningitis (TBM), for which more than 100,000 new cases are estimated to occur per year. In patients who are co-infected with HIV-1, TBM has a mortality approaching 50%. Study of TBM pathogenesis is hampered by a lack of experimental models that recapitulate all the features of the human disease. Diagnosis of TBM is often delayed by the insensitive and lengthy culture technique required for disease confirmation. Antibiotic regimens for TBM are based on those used to treat pulmonary tuberculosis, which probably results in suboptimal drug levels in the cerebrospinal fluid, owing to poor blood-brain barrier penetrance. The role of adjunctive anti-inflammatory, host-directed therapies - including corticosteroids, aspirin and thalidomide - has not been extensively explored. To address this deficit, two expert meetings were held in 2009 and 2015 to share findings and define research priorities. This Review summarizes historical and current research into TBM and identifies important gaps in our knowledge. We will discuss advances in the understanding of inflammation in TBM and its potential modulation; vascular and hypoxia-mediated tissue injury; the role of intensified antibiotic treatment; and the importance of rapid and accurate diagnostics and supportive care in TBM.
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Affiliation(s)
- Robert J Wilkinson
- Department of Medicine, Imperial College London, Norfolk Place, London W2 1PG, UK
- The Francis Crick Institute, Midland Road, London NW1 2AT, UK
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine and Department of Medicine, University of Cape Town, Republic of South Africa
| | - Ursula Rohlwink
- Division of Neurosurgery, University of Cape Town, Anzio Road, Observatory 7925, Republic of South Africa
| | - Usha Kant Misra
- Department of Neurology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Rae Bareli Road, Lucknow, Uttar Pradesh 226014, India
| | - Reinout van Crevel
- Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525 GA Nijmegen, The Netherlands
| | - Nguyen Thi Hoang Mai
- Oxford University Clinical Research Unit, 764 Vo Van Kiet, Quan 5, Ho Chi Minh City, Vietnam
| | - Kelly E Dooley
- Johns Hopkins University School of Medicine, The Johns Hopkins Hospital, 1800 Orleans Street, Baltimore, Maryland 21287, USA
| | - Maxine Caws
- Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, UK
| | - Anthony Figaji
- Division of Neurosurgery, University of Cape Town, Anzio Road, Observatory 7925, Republic of South Africa
| | - Rada Savic
- UCSF School of Pharmacy, Department, Bioengineering, 1700 4th Street, San Francisco, California 94158, UA
| | - Regan Solomons
- Faculty of Health Sciences, Stellenbosch University, Tygerberg Hospital, Francie van Zijl Drive, Tygerberg 7505, Cape Town, Republic of South Africa
| | - Guy E Thwaites
- Oxford University Clinical Research Unit, 764 Vo Van Kiet, Quan 5, Ho Chi Minh City, Vietnam
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Old Road, Oxford OX3 9FZ, UK
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13
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Tsukamoto Y, Maeda Y, Tamura T, Mukai T, Mitarai S, Yamamoto S, Makino M. Enhanced protective efficacy against tuberculosis provided by a recombinant urease deficient BCG expressing heat shock protein 70-major membrane protein-II having PEST sequence. Vaccine 2016; 34:6301-6308. [PMID: 27847173 DOI: 10.1016/j.vaccine.2016.10.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 09/14/2016] [Accepted: 10/22/2016] [Indexed: 11/26/2022]
Abstract
Enhancement of the T cell-stimulating ability of Mycobacterium bovis BCG (BCG) is necessary to develop an effective tuberculosis vaccine. For this purpose, we introduced the PEST-HSP70-major membrane protein-II (MMPII)-PEST fusion gene into ureC-gene depleted recombinant (r) BCG to produce BCG-PEST. The PEST sequence is involved in the proteasomal processing of antigens. BCG-PEST secreted the PEST-HSP70-MMPII-PEST fusion protein and more efficiently activated human monocyte-derived dendritic cells (DCs) in terms of phenotypic changes and cytokine productions than an empty-vector-introduced BCG or HSP70-MMPII gene-introduced ureC gene-depleted BCG (BCG-DHTM). Autologous human naïve CD8+ T cells and naïve CD4+ T cells were effectively activated by BCG-PEST and produced IFN-γ in an antigen-specific manner through DCs. These T cell activations were closely associated with phagosomal maturation and intraproteasomal protein degradation in antigen-presenting cells. Furthermore, BCG-PEST produced long-lasting memory-type T cells in C57BL/6 mice more efficiently than control rBCGs. Moreover, a single subcutaneous injection of BCG-PEST more effectively reduced the multiplication of subsequent aerosol-challenged Mycobacterium tuberculosis of the standard H37Rv strain and clinically isolated Beijing strain in the lungs than control rBCGs. The vaccination effect of BCG-PEST lasted for at least 6months. These results indicate that BCG-PEST may be able to efficiently control the spread of tuberculosis in human.
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Affiliation(s)
- Yumiko Tsukamoto
- Department of Mycobacteriology, Leprosy Research Center, National Institute of Infectious Diseases, 4-2-1 Aobacho, Higashimurayama, Tokyo, Japan.
| | - Yumi Maeda
- Department of Mycobacteriology, Leprosy Research Center, National Institute of Infectious Diseases, 4-2-1 Aobacho, Higashimurayama, Tokyo, Japan
| | - Toshiki Tamura
- Department of Mycobacteriology, Leprosy Research Center, National Institute of Infectious Diseases, 4-2-1 Aobacho, Higashimurayama, Tokyo, Japan
| | - Tetsu Mukai
- Department of Mycobacteriology, Leprosy Research Center, National Institute of Infectious Diseases, 4-2-1 Aobacho, Higashimurayama, Tokyo, Japan
| | - Satoshi Mitarai
- Department of Mycobacterium Reference and Research, The Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, 3-1-24 Matsuyama, Kiyose, Tokyo, Japan
| | | | - Masahiko Makino
- Department of Mycobacteriology, Leprosy Research Center, National Institute of Infectious Diseases, 4-2-1 Aobacho, Higashimurayama, Tokyo, Japan
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14
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Jeyanathan M, Damjanovic D, Yao Y, Bramson J, Smaill F, Xing Z. Induction of an Immune-Protective T-Cell Repertoire With Diverse Genetic Coverage by a Novel Viral-Vectored Tuberculosis Vaccine in Humans. J Infect Dis 2016; 214:1996-2005. [PMID: 27703038 DOI: 10.1093/infdis/jiw467] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 09/27/2016] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Whether a candidate tuberculosis vaccine induces clinically relevant protective T-cell repertoires in humans will not be known until the completion of costly efficacy clinical trials. METHODS We have developed an integrated immunologic approach to investigate the clinical relevance of T cells induced by a novel tuberculosis vaccine in a phase 1 trial. This approach consists of screening for likely dominant T-cell epitopes, establishing antigen-specific memory T-cell lines for identifying CD8+ and CD4+ T-cell epitopes, determining the ability of vaccine-induced T cells to inhibit mycobacterial growth in infected cells, and examining the genetic diversity of HLA recognition and the clinical relevance of identified T-cell epitopes. RESULTS A single-dose immunization in BCG-primed adults with an adenovirus-based tuberculosis vaccine elicits a repertoire of memory T cells capable of recognizing multiple Ag85A epitopes. These T cells are polyfunctional and cytotoxic and can inhibit mycobacterial growth in infected target cells. Some identified T-cell epitopes are promiscuous and recognizable by the common HLA alleles. These epitopes are clinically relevant to the epitopes identified in people with latent Mycobacterium tuberculosis infection and treated patients with tuberculosis. CONCLUSIONS These data support further clinical development of this candidate vaccine. Our approach helps fill the gap in clinical tuberculosis vaccine development.
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Affiliation(s)
- Mangalakumari Jeyanathan
- McMaster Immunology Research Centre.,Department of Pathology and Molecular Medicine.,Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Canada
| | - Daniela Damjanovic
- McMaster Immunology Research Centre.,Department of Pathology and Molecular Medicine.,Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Canada
| | - Yushi Yao
- McMaster Immunology Research Centre.,Department of Pathology and Molecular Medicine.,Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Canada
| | - Jonathan Bramson
- McMaster Immunology Research Centre.,Department of Pathology and Molecular Medicine.,Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Canada
| | - Fiona Smaill
- Department of Pathology and Molecular Medicine.,Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Canada
| | - Zhou Xing
- McMaster Immunology Research Centre.,Department of Pathology and Molecular Medicine.,Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Canada
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15
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Zhang Y, Feng L, Li L, Wang D, Li C, Sun C, Li P, Zheng X, Liu Y, Yang W, Niu X, Zhong N, Chen L. Effects of the fusion design and immunization route on the immunogenicity of Ag85A-Mtb32 in adenoviral vectored tuberculosis vaccine. Hum Vaccin Immunother 2016; 11:1803-13. [PMID: 26076321 DOI: 10.1080/21645515.2015.1042193] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Vaccines containing multiple antigens may induce broader immune responses and provide better protection against Mycobacterium tuberculosis (Mtb) infection as compared to a single antigen. However, strategies for incorporating multiple antigens into a single vector and the immunization routes may affect their immunogenicity. In this study, we utilized recombinant adenovirus type 5 (rAd5) as a model vaccine vector, and Ag85A (Rv3804c) and Mtb32 (Rv0125) as model antigens, to comparatively evaluate the influence of codon usage optimization, signal sequence, fusion linkers, and immunization routes on the immunogenicity of tuberculosis (TB) vaccine containing multiple antigens in C57BL/6 mice. We showed that codon-optimized Ag85A and Mtb32 fused with a GSG linker induced the strongest systemic and pulmonary cell-mediated immune (CMI) responses. Strong CMI responses were characterized by the generation of a robust IFN-γ ELISPOT response as well as antigen-specific CD4(+) T and CD8(+) T cells, which secreted mono-, dual-, or multiple cytokines. We also found that subcutaneous (SC) and intranasal (IN)/oral immunization with this candidate vaccine exhibited the strongest boosting effects for Mycobacterium bovis bacille Calmette-Guérin (BCG)-primed systemic and pulmonary CMI responses, respectively. Our results supported that codon optimized Ag85A and Mtb32 fused with a proper linker and immunized through SC and IN/oral routes can generate the strongest systemic and pulmonary CMI responses in BCG-primed mice, which may be particularly important for the design of TB vaccines containing multiple antigens.
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Key Words
- APC, Allophycocyanin
- BCG, Mycobacterium bovis bacille Calmette-Guérin
- BSA, bovine serum album
- CMI, cell-mediated immune responses
- DAPI, 4′,6-diamidino-2-phenylindole
- DMSO, Dimethyl sulfoxide
- ELISPOT, Enzyme-linked immune-sorbent spot
- FACS, Fluorescence Activated Cell Sorter
- FBS, fetal bovine serum
- FITC, fluorescein isothiocyanate
- HA tag, hemagglutinin tag
- HEK, human embryo kidney
- ICS, Intracellular cytokine staining
- IFN-γ, interferon gamma
- IL-2, Interleukin 2
- IM, intramuscular
- IN, intranasal
- Mtb, Mycobacterium tuberculosis
- NBT/BCIP, Nitro blue tetrazolium/ 5-Bromo-4-chloro-3-indolyl phosphate
- PBS, Phosphate Buffered Saline
- PCR, polymerase chain reaction
- PE, Phycoerythrin
- PerCP, Peridinin-ChlorophylL-Protein Complex
- RPMI, Roswell Park Memorial Institute
- SC, subcutaneous
- SDS-PAGE, sodium dodecyl sulfate polyacrylamide gel electrophoresis
- SFC, spot-forming cells
- TB, tuberculosis
- TNF-α, tumor necrosis factor α
- fusion strategies
- immunization routes
- immunogenicity
- multiple antigens
- mycobacterium tuberculosis
- rAd5, recombinant adenovirus type 5
- tPA, tissue plasminogen activator
- vp, viral particles
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Affiliation(s)
- Yiling Zhang
- a State Key Laboratory of Respiratory Diseases; The First Affiliated Hospital of Guangzhou Medical University ; Guangzhou , China
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16
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Pang C, Wu Y, Wan C, Shen K, Hu Y, Yang T, Shen Y, Wen F. Accuracy of the Bronchoalveolar Lavage Enzyme-Linked Immunospot Assay for the Diagnosis of Pulmonary Tuberculosis: A Meta-analysis. Medicine (Baltimore) 2016; 95:e3183. [PMID: 27015211 PMCID: PMC4998406 DOI: 10.1097/md.0000000000003183] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Assessing of local immune response may improve the accuracy of pulmonary tuberculosis (PTB) diagnosis. Many studies have investigated diagnosing PTB based on enzyme-linked immunospot (ELISPOT) assay of bronchoalveolar lavage (BAL) fluid, but the results have been inconclusive. We meta-analyzed the available evidences on overall diagnostic performance of ELISPOT assay of BAL fluid for diagnosing PTB.A systematic literature search was performed using PubMed, Embase, Wangfang, Weipu, and CNKI. Data were pooled on sensitivity, specificity, positive likelihood ratio (PLR), negative likelihood ratio (NLR), and diagnostic odds ratio (DOR). Overall test performance was summarized using summary receiver operating characteristic curves and the area under the curve (AUC). Deeks test was used to test for potential publication bias.Seven publications with 814 subjects met our inclusion criteria and were included in this meta-analysis. The following pooled estimates for diagnostic parameters were obtained: sensitivity, 0.90 (95% CI: 0.85-0.94); specificity, 0.80 (95% CI: 0.77-0.84); PLR, 5.08 (95% CI: 2.70-9.57); NLR, 0.13 (95% CI: 0.06-0.28); DOR, 49.12 (95% CI: 12.97-186.00); and AUC, 0.96. No publication bias was identified.The available evidence suggests that ELISPOT assay of BAL fluid is a useful rapid diagnostic test for PTB. The results of this assay should be interpreted in parallel with clinical findings and the results of conventional tests.
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Affiliation(s)
- Caishuang Pang
- From the Department of Respiratory and Critical Care Medicine, West China Hospital of Sichuan University and Division of Pulmonary Diseases, State Key Laboratory of Biotherapy of China, Chengdu (CP, YW, CW, TY, YS, FW); Chongqing Cancer Hospital, Chongqing Cancer Institute, Chongqing (CP); Radiation Physics Center, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital of Sichuan University (KS); and West China School of Medicine, Sichuan University, Chengdu, China (YH)
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17
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Axelsson-Robertson R, Rao M, Loxton AG, Walzl G, Bates M, Zumla A, Maeurer M. Frequency of Mycobacterium tuberculosis-specific CD8+ T-cells in the course of anti-tuberculosis treatment. Int J Infect Dis 2016; 32:23-9. [PMID: 25809751 DOI: 10.1016/j.ijid.2015.01.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 01/16/2015] [Accepted: 01/16/2015] [Indexed: 12/30/2022] Open
Abstract
Anti-tuberculosis drug treatment is known to affect the number, phenotype, and effector functionality of antigen-specific T-cells. In order to objectively gauge Mycobacterium tuberculosis (MTB)-specific CD8+ T-cells at the single-cell level, we developed soluble major histocompatibility complex (MHC) class I multimers/peptide multimers, which allow analysis of antigen-specific T-cells without ex vivo manipulation or functional tests. We constructed 38 MHC class I multimers covering some of the most frequent MHC class I alleles (HLA-A*02:01, A*24:02, A*30:01, A*30:02, A*68:01, B*58:01, and C*07:01) pertinent to a South African or Zambian population, and presenting the following MTB-derived peptides: the early expressed secreted antigens TB10.4 (Rv0288), Ag85B (Rv1886c), and ESAT-6 (Rv3875), as well as intracellular enzymes, i.e., glycosyltransferase 1 (Rv2957), glycosyltransferase 2 (Rv2958c), and cyclopropane fatty acid synthase (Rv0447c). Anti-TB treatment appeared to impact on the frequency of multimer-positive CD8+ T-cells, with a general decrease after 6 months of therapy. Also, a reduction in the total central memory CD8+ T-cell frequencies, as well as the antigen-specific compartment in CD45RA-CCR7+ T-cells was observed. We discuss our findings on the basis of differential dynamics of MTB-specific T-cell frequencies, impact of MTB antigen load on T-cell phenotype, and antigen-specific T-cell responses in tuberculosis.
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Affiliation(s)
- Rebecca Axelsson-Robertson
- Centre for Allogeneic Stem Cell Transplantation (CAST), Karolinska University Hospital, Stockholm, Sweden
| | - Martin Rao
- Division of Therapeutic Immunology (TIM), Department of Laboratory Medicine (LABMED), Karolinska Institutet, Hälsovägen F79, Karolinska University Hospital Huddinge Campus, SE14186, Stockholm, Sweden
| | - Andre G Loxton
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research and MRC Centre for Molecular and Cellular Biology, Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Health Sciences, Stellenbosch University, South Africa
| | - Gerhard Walzl
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research and MRC Centre for Molecular and Cellular Biology, Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Health Sciences, Stellenbosch University, South Africa
| | - Matthew Bates
- Division of Infection and Immunity, University College London, London, UK; UNZA-UCLMs Research and Training Project, University Teaching Hospital, Lusaka, Zambia
| | - Alimuddin Zumla
- Division of Infection and Immunity, University College London, London, UK; UNZA-UCLMs Research and Training Project, University Teaching Hospital, Lusaka, Zambia; NIHR Biomaedical Research Centre at University College London Hospitals, London, UK
| | - Markus Maeurer
- Centre for Allogeneic Stem Cell Transplantation (CAST), Karolinska University Hospital, Stockholm, Sweden; Division of Therapeutic Immunology (TIM), Department of Laboratory Medicine (LABMED), Karolinska Institutet, Hälsovägen F79, Karolinska University Hospital Huddinge Campus, SE14186, Stockholm, Sweden.
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18
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Mycobacterium tuberculosis-specific and MHC class I-restricted CD8+ T-cells exhibit a stem cell precursor-like phenotype in patients with active pulmonary tuberculosis. Int J Infect Dis 2016; 32:13-22. [PMID: 25809750 DOI: 10.1016/j.ijid.2014.12.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 12/06/2014] [Indexed: 02/03/2023] Open
Abstract
The nature and longevity of the T-cell response directed against Mycobacterium tuberculosis (MTB) are important for effective pathogen containment. We analyzed ex vivo the nature of MTB antigen-specific T-cell responses directed against the MTB secreted antigens Rv0288, Rv1886c, Rv3875, the antigens Rv2958c, Rv2957, and Rv0447c (intracellular, non-secreted enzymes) in blood from Korean patients with active tuberculosis (TB). MTB-specific T-cell function was defined by intracellular cytokine production (interleukin (IL)-2, interferon gamma, tumour necrosis factor alpha, and IL-17) and by multimer-guided (HLA-A*02:01 and HLA-A*24:02) analysis of epitope-specific CD8+ T-cells, along with phenotypic markers (CD45RA and CCR7), CD107a, a marker for degranulation, and CD127 co-staining for T-cell differentiation and homing. Cytokine production analysis underestimated the frequencies of MTB antigen-specific T-cells defined by major histocompatibility complex (MHC) class I-peptide multimer analysis. We showed that MTB antigen-specific CD8+ T-cells exhibit a distinct marker profile associated with the nature of the MTB antigens, i.e., Rv0288, Rv1886c, and Rv3875-reactive T-cells clustered in the precursor T-cell compartment, whereas Rv2958c, Rv2957, and Rv0447c-reactive T-cells were associated with the terminally differentiated T-cell phenotype, in the patient cohort. Rv0288, Rv1886c, and Rv3875-specific CD8+ T-cells were significantly enriched for CD107a+ T-cells in HLA-A*02:01 (p<0.0001) and HLA-A*24:02 (p=0.0018) positive individuals, as compared to Rv2958c, Rv2957, and Rv0447c antigens. CD127 (IL-7 receptor)-expressing T-cells were enriched in HLA-A*02:01-positive individuals for the Rv0288, Rv1886c, and Rv3875 specificities (p=0.03). A high proportion of antigen-specific T-cells showed a precursor-like phenotype (CD45RA+CCR7+) and expressed the stem cell-associated markers CD95 and c-kit. These data show that MTB-specific T-cells can express stem cell-like features; this is associated with the nature of the MTB antigen and the genetic background of the individual.
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Riou C, Tanko RF, Soares AP, Masson L, Werner L, Garrett NJ, Samsunder N, Karim QA, Karim SSA, Burgers WA. Restoration of CD4+ Responses to Copathogens in HIV-Infected Individuals on Antiretroviral Therapy Is Dependent on T Cell Memory Phenotype. THE JOURNAL OF IMMUNOLOGY 2015. [PMID: 26195814 DOI: 10.4049/jimmunol.1500803] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Antiretroviral therapy (ART) induces rapid suppression of viral replication and a progressive replenishment of CD4(+) T cells in HIV-infected individuals. However, the effect of ART on restoring pre-existing memory CD4(+) T cells specific for common copathogens is still unclear. To better understand the dynamics of Ag-specific CD4(+) T cells during ART, we assessed the frequency, functional capacity, and memory profile of CD4(+) T cells specific for Mycobacterium tuberculosis and CMV in 15 HIV-infected individuals before and 1 y after ART initiation. After ART initiation, the frequency of M. tuberculosis-specific CD4(+) T cells showed little change, whereas CMV-specific CD4(+) T cells were significantly lower (p = 0.003). There was no difference in the polyfunctional or memory profile of Ag-specific CD4(+) T cells before and after ART. The replenishment of Ag-specific CD4(+) T cells correlated with the memory differentiation profile of these cells prior to ART. Pathogen-specific CD4(+) T cells exhibiting a late differentiated profile (CD45RO(+)CD27(-)) had a lower capacity to replenish (p = 0.019; r = -0.5) compared with cells with an early differentiated profile (CD45RO(+)CD27(+); p = 0.04; r = 0.45). In conclusion, restoration of copathogen-specific memory CD4(+) T cells during treated HIV infection is related to their memory phenotype, in which early differentiated cells (such as most M. tuberculosis-specific cells) have a higher replenishment capacity compared with late differentiated cells (such as most CMV-specific cells). These data identify an important, hitherto unrecognized, factor that may limit restoration of copathogen immunity in HIV-infected individuals on ART.
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Affiliation(s)
- Catherine Riou
- Division of Medical Virology and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Ramla F Tanko
- Division of Medical Virology and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Andreia P Soares
- Division of Medical Virology and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Lindi Masson
- Division of Medical Virology and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,Centre for the AIDS Program of Research in South Africa (CAPRISA), University of KwaZulu-Natal, Durban, South Africa
| | - Lise Werner
- Centre for the AIDS Program of Research in South Africa (CAPRISA), University of KwaZulu-Natal, Durban, South Africa
| | - Nigel J Garrett
- Centre for the AIDS Program of Research in South Africa (CAPRISA), University of KwaZulu-Natal, Durban, South Africa
| | - Natasha Samsunder
- Centre for the AIDS Program of Research in South Africa (CAPRISA), University of KwaZulu-Natal, Durban, South Africa
| | - Quarraisha Abdool Karim
- Centre for the AIDS Program of Research in South Africa (CAPRISA), University of KwaZulu-Natal, Durban, South Africa
| | - Salim S Abdool Karim
- Centre for the AIDS Program of Research in South Africa (CAPRISA), University of KwaZulu-Natal, Durban, South Africa
| | - Wendy A Burgers
- Division of Medical Virology and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
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Suarez GV, Angerami MT, Vecchione MB, Laufer N, Turk G, Ruiz MJ, Mesch V, Fabre B, Maidana P, Ameri D, Cahn P, Sued O, Salomón H, Bottasso OA, Quiroga MF. HIV-TB coinfection impairs CD8(+) T-cell differentiation and function while dehydroepiandrosterone improves cytotoxic antitubercular immune responses. Eur J Immunol 2015; 45:2529-41. [PMID: 26047476 DOI: 10.1002/eji.201545545] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 05/08/2015] [Accepted: 06/01/2015] [Indexed: 12/14/2022]
Abstract
Tuberculosis (TB) is the leading cause of death among HIV-positive patients. The decreasing frequencies of terminal effector (TTE ) CD8(+) T cells may increase reactivation risk in persons latently infected with Mycobacterium tuberculosis (Mtb). We have previously shown that dehydroepiandrosterone (DHEA) increases the protective antitubercular immune responses in HIV-TB patients. Here, we aimed to study Mtb-specific cytotoxicity, IFN-γ secretion, memory status of CD8(+) T cells, and their modulation by DHEA during HIV-TB coinfection. CD8(+) T cells from HIV-TB patients showed a more differentiated phenotype with diminished naïve and higher effector memory and TTE T-cell frequencies compared to healthy donors both in total and Mtb-specific CD8(+) T cells. Notably, CD8(+) T cells from HIV-TB patients displayed higher Terminal Effector (TTE ) CD45RA(dim) proportions with lower CD45RA expression levels, suggesting a not fully differentiated phenotype. Also, PD-1 expression levels on CD8(+) T cells from HIV-TB patients increased although restricted to the CD27(+) population. Interestingly, DHEA plasma levels positively correlated with TTE in CD8(+) T cells and in vitro DHEA treatment enhanced Mtb-specific cytotoxic responses and terminal differentiation in CD8(+) T cells from HIV-TB patients. Our data suggest that HIV-TB coinfection promotes a deficient CD8(+) T-cell differentiation, whereas DHEA may contribute to improving antitubercular immunity by enhancing CD8(+) T-cell functions during HIV-TB coinfection.
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Affiliation(s)
- Guadalupe V Suarez
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA, Universidad de Buenos Aires - CONICET, Argentina
| | - Matías T Angerami
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA, Universidad de Buenos Aires - CONICET, Argentina
| | - María B Vecchione
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA, Universidad de Buenos Aires - CONICET, Argentina
| | - Natalia Laufer
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA, Universidad de Buenos Aires - CONICET, Argentina.,Hospital Juan A. Fernández, Buenos Aires, Argentina
| | - Gabriela Turk
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA, Universidad de Buenos Aires - CONICET, Argentina
| | - Maria J Ruiz
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA, Universidad de Buenos Aires - CONICET, Argentina
| | - Viviana Mesch
- Departamento de Bioquímica Clínica, INFIBIOC, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
| | - Bibiana Fabre
- Departamento de Bioquímica Clínica, INFIBIOC, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
| | - Patricia Maidana
- Departamento de Bioquímica Clínica, INFIBIOC, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
| | - Diego Ameri
- Hospital Juan A. Fernández, Buenos Aires, Argentina
| | - Pedro Cahn
- Hospital Juan A. Fernández, Buenos Aires, Argentina.,Área de Investigaciones Médicas, Fundación Huésped, Buenos Aires, Argentina
| | - Omar Sued
- Área de Investigaciones Médicas, Fundación Huésped, Buenos Aires, Argentina
| | - Horacio Salomón
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA, Universidad de Buenos Aires - CONICET, Argentina
| | - Oscar A Bottasso
- Instituto de Inmunología Clínica y Experimental de Rosario (IDICER), CONICET-UNR, Rosario, Santa Fe, Argentina
| | - María F Quiroga
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA, Universidad de Buenos Aires - CONICET, Argentina
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Lee J, Kim J, Lee J, Shin SJ, Shin EC. DNA immunization of Mycobacterium tuberculosis resuscitation-promoting factor B elicits polyfunctional CD8(+) T cell responses. Clin Exp Vaccine Res 2014; 3:235-43. [PMID: 25003098 PMCID: PMC4083077 DOI: 10.7774/cevr.2014.3.2.235] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 05/12/2014] [Accepted: 05/15/2014] [Indexed: 11/19/2022] Open
Abstract
Purpose T cell-mediated immune responses, and particularly activation of polyfunctional T cells that simultaneously produce multiple cytokines, are necessary for the control of Mycobacterium tuberculosis. In the present study, we examined if DNA immunization of Mycobacterium tuberculosis resuscitation-promoting factor B (RpfB) elicits polyfunctional T cell responses in mice. Materials and Methods C57BL/6 mice were immunized intramuscularly three times, at 3-week intervals, with RpfB-expressing plasmid DNA. For comparison, protein immunization was performed with recombinant RpfB in control mice. After immunization, RpfB-specific T cell responses were assessed by interferon-γ (IFN-γ) enzyme-linked immunosorbent spot assay and intracellular cytokine staining (ICS), and T cell polyfunctionality was assessed from the ICS data. Results RpfB DNA immunization induced not only humoral immune responses, but also CD8+ and CD4+ T cell responses. Immunodominant T-cell epitopes were identified within RpfB by assays with overlapping peptides. RpfB DNA immunization elicited a polyfunctional CD8+ T cell response that was dominated by a functional phenotype of IFN-γ+/TNF-α+/IL-2-/CD107a+. Conclusion RpfB DNA immunization elicits polyfunctional CD8+ T cell responses, suggesting that RpfB DNA immunization might induce protective immunity against tuberculosis.
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Affiliation(s)
- Jino Lee
- Laboratory of Immunology and Infectious Diseases, Graduate School of Medical Science and Engineering, KAIST, Daejeon, Korea
| | - Jihye Kim
- Laboratory of Immunology and Infectious Diseases, Graduate School of Medical Science and Engineering, KAIST, Daejeon, Korea
| | - Jeewon Lee
- Laboratory of Immunology and Infectious Diseases, Graduate School of Medical Science and Engineering, KAIST, Daejeon, Korea
| | - Sung Jae Shin
- Department of Microbiology and Institute of Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea
| | - Eui-Cheol Shin
- Laboratory of Immunology and Infectious Diseases, Graduate School of Medical Science and Engineering, KAIST, Daejeon, Korea
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Trentini MM, de Oliveira FM, Gaeti MPN, Batista AC, Lima EM, Kipnis A, Junqueira-Kipnis AP. Microstructured liposome subunit vaccines reduce lung inflammation and bacterial load after Mycobacterium tuberculosis infection. Vaccine 2014; 32:4324-32. [PMID: 24951861 DOI: 10.1016/j.vaccine.2014.06.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 05/04/2014] [Accepted: 06/06/2014] [Indexed: 01/13/2023]
Abstract
BACKGROUND Tuberculosis is a disease affecting millions of people throughout the world. One of the main problems in controlling the disease is the low efficacy of the Bacillus Calmette-Guérin (BCG) vaccine in protecting young adults. The development of new vaccines that induce a long-lasting immune response or that stimulate the immunity induced by BCG may improve the control of tuberculosis. METHODS The use of microstructured liposomes containing HspX, with or without MPL or CpG DNA adjuvants, as vaccines for tuberculosis was evaluated. The HspX-specific humoral and cellular immune responses to the different vaccine formulations were compared. RESULTS All vaccines containing liposome microparticles and HspX were immunogenic. Vaccines formulated with CpG DNA and HspX induced the strongest humoral and cellular immune responses, mainly by inducing interferon-γ and tumor necrosis factor-α expression by both CD4(+) and CD8(+) T cells. HspX and MPL mainly induced CD8(+) T-cell activation and specific humoral responses. When evaluated the protective efficacy of the formulations against Mycobacterium tuberculosis challenge, the microstructured liposome containing L-HspX and L-HspX-CPG DNA reduced both lung inflammatory lesions and the bacterial load. CONCLUSION We have thus demonstrated, for the first time, the use of microstructured liposomes as an adjuvant and delivery system for a vaccine formulation against tuberculosis.
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Affiliation(s)
- Monalisa Martins Trentini
- Laboratório de Imunopatologia das Doenças Infecciosas, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Brazil
| | - Fábio Muniz de Oliveira
- Laboratório de Bacteriologia Molecular, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Brazil
| | | | - Aline Carvalho Batista
- Laboratório de Patologia, Faculdade de Odontologia, Universidade Federal de Goiás, Brazil
| | - Eliana Martins Lima
- Laboratório de Nanotecnologia Farmacêutica - FarmaTec, Faculdade de Farmácia, Universidade Federal de Goiás, Brazil
| | - André Kipnis
- Laboratório de Bacteriologia Molecular, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Brazil
| | - Ana Paula Junqueira-Kipnis
- Laboratório de Imunopatologia das Doenças Infecciosas, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Brazil.
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Prezzemolo T, Guggino G, La Manna MP, Di Liberto D, Dieli F, Caccamo N. Functional Signatures of Human CD4 and CD8 T Cell Responses to Mycobacterium tuberculosis. Front Immunol 2014; 5:180. [PMID: 24795723 PMCID: PMC4001014 DOI: 10.3389/fimmu.2014.00180] [Citation(s) in RCA: 175] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 04/07/2014] [Indexed: 12/17/2022] Open
Abstract
With 1.4 million deaths and 8.7 million new cases in 2011, tuberculosis (TB) remains a global health care problem and together with HIV and Malaria represents one of the three infectious diseases world-wide. Control of the global TB epidemic has been impaired by the lack of an effective vaccine, by the emergence of drug-resistant forms of Mycobacterium tuberculosis (Mtb) and by the lack of sensitive and rapid diagnostics. It is estimated, by epidemiological reports, that one third of the world’s population is latently infected with Mtb, but the majority of infected individuals develop long-lived protective immunity, which controls and contains Mtb in a T cell-dependent manner. Development of TB disease results from interactions among the environment, the host, and the pathogen, and known risk factors include HIV co-infection, immunodeficiency, diabetes mellitus, overcrowding, malnutrition, and general poverty; therefore, an effective T cell response determines whether the infection resolves or develops into clinically evident disease. Consequently, there is great interest in determining which T cells subsets mediate anti-mycobacterial immunity, delineating their effector functions. On the other hand, many aspects remain unsolved in understanding why some individuals are protected from Mtb infection while others go on to develop disease. Several studies have demonstrated that CD4+ T cells are involved in protection against Mtb, as supported by the evidence that CD4+ T cell depletion is responsible for Mtb reactivation in HIV-infected individuals. There are many subsets of CD4+ T cells, such as T-helper 1 (Th1), Th2, Th17, and regulatory T cells (Tregs), and all these subsets co-operate or interfere with each other to control infection; the dominant subset may differ between active and latent Mtb infection cases. Mtb-specific-CD4+ Th1 cell response is considered to have a protective role for the ability to produce cytokines such as IFN-γ or TNF-α that contribute to the recruitment and activation of innate immune cells, like monocytes and granulocytes. Thus, while other antigen (Ag)-specific T cells such as CD8+ T cells, natural killer (NK) cells, γδ T cells, and CD1-restricted T cells can also produce IFN-γ during Mtb infection, they cannot compensate for the lack of CD4+ T cells. The detection of Ag-specific cytokine production by intracellular cytokine staining (ICS) and the use of flow cytometry techniques are a common routine that supports the studies aimed at focusing the role of the immune system in infectious diseases. Flow cytometry permits to evaluate simultaneously the presence of different cytokines that can delineate different subsets of cells as having “multifunctional/polyfunctional” profile. It has been proposed that polyfunctional T cells, are associated with protective immunity toward Mtb, in particular it has been highlighted that the number of Mtb-specific T cells producing a combination of IFN-γ, IL-2, and/or TNF-α may be correlated with the mycobacterial load, while other studies have associated the presence of this particular functional profile as marker of TB disease activity. Although the role of CD8 T cells in TB is less clear than CD4 T cells, they are generally considered to contribute to optimal immunity and protection. CD8 T cells possess a number of anti-microbial effector mechanisms that are less prominent or absent in CD4 Th1 and Th17 T cells. The interest in studying CD8 T cells that are either MHC-class Ia or MHC-class Ib-restricted, has gained more attention. These studies include the role of HLA-E-restricted cells, lung mucosal-associated invariant T-cells (MAIT), and CD1-restricted cells. Nevertheless, the knowledge about the role of CD8+ T cells in Mtb infection is relatively new and recent studies have delineated that CD8 T cells, which display a functional profile termed “multifunctional,” can be a better marker of protection in TB than CD4+ T cells. Their effector mechanisms could contribute to control Mtb infection, as upon activation, CD8 T cells release cytokines or cytotoxic molecules, which cause apoptosis of target cells. Taken together, the balance of the immune response in the control of infection and possibly bacterial eradication is important in understanding whether the host immune response will be appropriate in contrasting the infection or not, and, consequently, the inability of the immune response, will determine the dissemination and the transmission of bacilli to new subjects. In conclusion, the recent highlights on the role of different functional signatures of T cell subsets in the immune response toward Mtb infection will be discerned in this review, in order to summarize what is known about the immune response in human TB. In particular, we will discuss the role of CD4 and CD8 T cells in contrasting the advance of the intracellular pathogen in already infected people or the progression to active disease in subjects with latent infection. All the information will be aimed at increasing the knowledge of this complex disease in order to improve diagnosis, prognosis, drug treatment, and vaccination.
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Affiliation(s)
- Teresa Prezzemolo
- Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi and Central Laboratory of Advanced Diagnosis and Biomedical Research, University of Palermo , Palermo , Italy
| | - Giuliana Guggino
- Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi and Central Laboratory of Advanced Diagnosis and Biomedical Research, University of Palermo , Palermo , Italy
| | - Marco Pio La Manna
- Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi and Central Laboratory of Advanced Diagnosis and Biomedical Research, University of Palermo , Palermo , Italy
| | - Diana Di Liberto
- Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi and Central Laboratory of Advanced Diagnosis and Biomedical Research, University of Palermo , Palermo , Italy
| | - Francesco Dieli
- Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi and Central Laboratory of Advanced Diagnosis and Biomedical Research, University of Palermo , Palermo , Italy
| | - Nadia Caccamo
- Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi and Central Laboratory of Advanced Diagnosis and Biomedical Research, University of Palermo , Palermo , Italy
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Day CL, Moshi ND, Abrahams DA, van Rooyen M, O'rie T, de Kock M, Hanekom WA. Patients with tuberculosis disease have Mycobacterium tuberculosis-specific CD8 T cells with a pro-apoptotic phenotype and impaired proliferative capacity, which is not restored following treatment. PLoS One 2014; 9:e94949. [PMID: 24740417 PMCID: PMC3989259 DOI: 10.1371/journal.pone.0094949] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Accepted: 03/21/2014] [Indexed: 11/18/2022] Open
Abstract
CD8 T cells play a critical role in control of chronic viral infections; however, the role of these cells in containing persistent bacterial infections, such as those caused by Mycobacterium tuberculosis (Mtb), is less clear. We assessed the phenotype and functional capacity of CD8 T cells specific for the immunodominant Mtb antigens CFP-10 and ESAT-6, in patients with pulmonary tuberculosis (TB) disease, before and after treatment, and in healthy persons with latent Mtb infection (LTBI). In patients with TB disease, CFP-10/ESAT-6-specific IFN-γ+ CD8 T cells had an activated, pro-apoptotic phenotype, with lower Bcl-2 and CD127 expression, and higher Ki67, CD57, and CD95 expression, than in LTBI. When CFP-10/ESAT-6-specific IFN-γ+ CD8 T cells were detectable, expression of distinct combinations of these markers was highly sensitive and specific for differentiating TB disease from LTBI. Successful treatment of disease resulted in changes of these markers, but not in restoration of CFP-10/ESAT-6-specific CD8 or CD4 memory T cell proliferative capacity. These data suggest that high mycobacterial load in active TB disease is associated with activated, short-lived CFP-10/ESAT-6-specific CD8 T cells with impaired functional capacity that is not restored following treatment. By contrast, LTBI is associated with preservation of long-lived CFP-10/ESAT-6-specific memory CD8 T cells that maintain high Bcl-2 expression and which may readily proliferate.
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Affiliation(s)
- Cheryl L. Day
- South African Tuberculosis Vaccine Initiative (SATVI) and School of Child and Adolescent Health, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory, South Africa
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, United States of America
- Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, United States of America
- Emory Vaccine Center, Emory University, Atlanta, Georgia, United States of America
- * E-mail:
| | - Noella D. Moshi
- South African Tuberculosis Vaccine Initiative (SATVI) and School of Child and Adolescent Health, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory, South Africa
| | - Deborah A. Abrahams
- South African Tuberculosis Vaccine Initiative (SATVI) and School of Child and Adolescent Health, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory, South Africa
| | - Michele van Rooyen
- South African Tuberculosis Vaccine Initiative (SATVI) and School of Child and Adolescent Health, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory, South Africa
| | - Terrence O'rie
- South African Tuberculosis Vaccine Initiative (SATVI) and School of Child and Adolescent Health, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory, South Africa
| | - Marwou de Kock
- South African Tuberculosis Vaccine Initiative (SATVI) and School of Child and Adolescent Health, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory, South Africa
| | - Willem A. Hanekom
- South African Tuberculosis Vaccine Initiative (SATVI) and School of Child and Adolescent Health, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory, South Africa
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Polyclonal activation of naïve T cells by urease deficient-recombinant BCG that produced protein complex composed of heat shock protein 70, CysO and major membrane protein-II. BMC Infect Dis 2014; 14:179. [PMID: 24690183 PMCID: PMC4011778 DOI: 10.1186/1471-2334-14-179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Accepted: 03/21/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mycobacterium bovis bacillus Calmette-Guérin (BCG) is known to be only partially effective in inhibiting M. tuberculosis (MTB) multiplication in human. A new recombinant (r) urease-deficient BCG (BCG-dHCM) that secretes protein composed of heat shock protein (HSP)70, MTB-derived CysO and major membrane protein (MMP)-II was produced for the efficient production of interferon gamma (IFN-γ) which is an essential element for mycobacteriocidal action and inhibition of neutrophil accumulation in lungs. METHODS Human monocyte-derived dendritic cells (DC) and macrophages were differentiated from human monocytes, infected with BCG and autologous T cells-stimulating activity of different constructs of BCG was assessed. C57BL/6 mice were used to test the effectiveness of BCG for the production of T cells responsive to MTB-derived antigens (Ags). RESULTS BCG-dHCM intracellularly secreted HSP70-CysO-MMP-II fusion protein, and activated DC by up-regulating Major Histcompatibility Complex (MHC), CD86 and CD83 molecules and enhanced various cytokines production from DC and macrophages. BCG-dHCM activated naïve T cells of both CD4 and CD8 subsets through DC, and memory type CD4+ T cells through macrophages in a manner dependent on MHC and CD86 molecules. These T cell activations were inhibited by the pre-treatment of Ag-presenting cells (APCs) with chloroquine. The single and primary BCG-dHCM-inoculation produced long lasting T cells responsive to in vitro secondarily stimulation with HSP70, CysO, MMP-II and H37Rv-derived cytosolic protein, and partially inhibited the replication of aerosol-challenged MTB. CONCLUSIONS The results indicate that introduction of different type of immunogenic molecules into a urease-deficient rBCG is useful for providing polyclonal T cell activating ability to BCG and for production of T cells responsive to secondary stimulation.
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Savolainen LE, Koskivirta P, Kantele A, Valleala H, Pusa L, Tuompo R, Westerlund-Wikström B, Tuuminen T. Cytotoxic response persists in subjects treated for tuberculosis decades ago. BMC Infect Dis 2013; 13:573. [PMID: 24308801 PMCID: PMC4029532 DOI: 10.1186/1471-2334-13-573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Accepted: 12/04/2013] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Data exploring the potential use of effector molecules produced by cytotoxic T lymphocytes (CTLs) in the immunodiagnostics of tuberculosis (TB) are scarce. The present study focused a) to gain an insight into the discriminatory power of CTLs in patients with acute pulmonary or extra-pulmonary TB, or latent tuberculosis infection (LTBI); and b) to evaluate the influence of various anti-TB therapeutic schemes on the immunological profiles of residual CTLs. METHODS Immunological signatures of antigen-specific CTLs were explored in patients with active pulmonary and extra-pulmonary TB, LTBI and in those treated for TB decades ago by using ELISPOT, intracellular flow cytometry and extracellular CD107a detection. RESULTS No difference was seen between active TB, LTBI or any of those treated for TB in the ELISPOT analysis of antigen-specific Granzyme B (GrB), Perforin (Prf) and interferon-gamma (IFN-γ) producing lymphocytes, the FACS analysis of the intracellular expression of IFN-γ, or the surface expression of CD107a degranulation factor of both CD8+ and CD4+ antigen-specific T cell subsets. The effector memory (TEM) phenotype proved predominant in the surface marker profiling both in active TB and LTBI. The proportion of the CD107a degranulation factor proved higher in the central memory (TCM) than in the other cell subsets in all the study groups. Interestingly, functionally and phenotypically similar CTLs profiles were observed in active TB, LTBI and in all the three groups treated for TB. CONCLUSION The phenotypic and functional profiling of CTLs has a limited potential in the immunodiagnostics of active TB. Antigen-specific CTLs persist in patients treated for TB decades ago regardless of the efficacy of implemented and completed anti-TB therapy.
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Affiliation(s)
- Laura E Savolainen
- Department of Bacteriology and Immunology, Haartman Institute, University of Helsinki, PL 21, Helsinki 00014, Finland
| | - Pekka Koskivirta
- Department of Bacteriology and Immunology, Haartman Institute, University of Helsinki, PL 21, Helsinki 00014, Finland
| | - Anu Kantele
- Department of Bacteriology and Immunology, Haartman Institute, University of Helsinki, PL 21, Helsinki 00014, Finland
- Division of Infectious Diseases, Department of Medicine, Helsinki University Central Hospital, Helsinki, Finland
- Institute of Clinical Medicine, Department of Medicine, University of Helsinki, Helsinki, Finland
| | - Heikki Valleala
- Division of Rheumatology, Department of Medicine, Helsinki University Central Hospital, Helsinki, Finland
| | - Liana Pusa
- Länsi-Uusimaa Hospital, Tammisaari, Finland
| | - Riitta Tuompo
- Division of Rheumatology, Department of Medicine, Helsinki University Central Hospital, Helsinki, Finland
| | | | - Tamara Tuuminen
- Department of Bacteriology and Immunology, Haartman Institute, University of Helsinki, PL 21, Helsinki 00014, Finland
- Eastern Finland Laboratory Centre Joint Authority Enterprise, Mikkeli, Finland
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Efficient activation of human T cells of both CD4 and CD8 subsets by urease-deficient recombinant Mycobacterium bovis BCG that produced a heat shock protein 70-M. tuberculosis-derived major membrane protein II fusion protein. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2013; 21:1-11. [PMID: 24152387 DOI: 10.1128/cvi.00564-13] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
For the purpose of obtaining Mycobacterium bovis bacillus Calmette-Guérin (BCG) capable of activating human naive T cells, urease-deficient BCG expressing a fusion protein composed of Mycobacterium tuberculosis-derived major membrane protein II (MMP-II) and heat shock protein 70 (HSP70) of BCG (BCG-DHTM) was produced. BCG-DHTM secreted the HSP70-MMP-II fusion protein and effectively activated human monocyte-derived dendritic cells (DCs) by inducing phenotypic changes and enhanced cytokine production. BCG-DHTM-infected DCs activated naive T cells of both CD4 and naive CD8 subsets, in an antigen (Ag)-dependent manner. The T cell activation induced by BCG-DHTM was inhibited by the pretreatment of DCs with chloroquine. The naive CD8(+) T cell activation was mediated by the transporter associated with antigen presentation (TAP) and the proteosome-dependent cytosolic cross-priming pathway. Memory CD8(+) T cells and perforin-producing effector CD8(+) T cells were efficiently produced from the naive T cell population by BCG-DHTM stimulation. Single primary infection with BCG-DHTM in C57BL/6 mice efficiently produced T cells responsive to in vitro secondary stimulation with HSP70, MMP-II, and M. tuberculosis-derived cytosolic protein and inhibited the multiplication of subsequently aerosol-challenged M. tuberculosis more efficiently than did vector control BCG. These results indicate that the introduction of MMP-II and HSP70 into urease-deficient BCG may be useful for improving BCG for control of tuberculosis.
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Dintwe OB, Day CL, Smit E, Nemes E, Gray C, Tameris M, McShane H, Mahomed H, Hanekom WA, Scriba TJ. Heterologous vaccination against human tuberculosis modulates antigen-specific CD4+ T-cell function. Eur J Immunol 2013; 43:2409-20. [PMID: 23737382 PMCID: PMC3816254 DOI: 10.1002/eji.201343454] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 04/24/2013] [Accepted: 05/31/2013] [Indexed: 12/19/2022]
Abstract
Heterologous prime-boost strategies hold promise for vaccination against tuberculosis. However, the T-cell characteristics required for protection are not known. We proposed that boost vaccines should induce long-lived functional and phenotypic changes to T cells primed by Bacille Calmette Guerin (BCG) and/or natural exposure to mycobacteria. We characterized changes among specific CD4+ T cells after vaccination with the MVA85A vaccine in adults, adolescents, and children. CD4+ T cells identified with Ag85A peptide-bearing HLA class II tetramers were characterized by flow cytometry. We also measured proliferative potential and cytokine expression of Ag85A-specific CD4+ T cells. During the effector phase, MVA85A-induced specific CD4+ T cells coexpressed IFN-γ and IL-2, skin homing integrins, and the activation marker CD38. This was followed by contraction and a transition to predominantly IL-2-expressing, CD45RA−CCR7+CD27+ or CD45RA+CCR7+CD27+ specific CD4+ T cells. These surface phenotypes were similar to Ag85A-specific T cells prior to MVA85A. However, functional differences were observed postvaccination: specific proliferative capacity was markedly higher after 6–12 months than before vaccination. Our data suggest that MVA85A vaccination may modulate Ag85A-specific CD4+ T-cell function, resulting in greater recall potential. Importantly, surface phenotypes commonly used as proxies for memory T-cell function did not associate with functional effects of vaccination.
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Affiliation(s)
- One B Dintwe
- South African Tuberculosis Vaccine Initiative and School of Child and Adolescent Health, Institute of Infectious Disease and Molecular Medicine, University of Cape TownCape Town, South Africa
| | - Cheryl L Day
- South African Tuberculosis Vaccine Initiative and School of Child and Adolescent Health, Institute of Infectious Disease and Molecular Medicine, University of Cape TownCape Town, South Africa
- Department of Global Health, Rollins School of Public Health, Emory UniversityAtlanta, GA, USA
- Emory Vaccine Center, Emory UniversityAtlanta, GA, USA
| | - Erica Smit
- South African Tuberculosis Vaccine Initiative and School of Child and Adolescent Health, Institute of Infectious Disease and Molecular Medicine, University of Cape TownCape Town, South Africa
| | - Elisa Nemes
- South African Tuberculosis Vaccine Initiative and School of Child and Adolescent Health, Institute of Infectious Disease and Molecular Medicine, University of Cape TownCape Town, South Africa
| | - Clive Gray
- Division of Immunology, Institute of Infectious Disease and Molecular Medicine, University of Cape TownCape Town, South Africa
| | - Michele Tameris
- South African Tuberculosis Vaccine Initiative and School of Child and Adolescent Health, Institute of Infectious Disease and Molecular Medicine, University of Cape TownCape Town, South Africa
| | - Helen McShane
- Centre for Clinical Vaccinology and Tropical Medicine and The Jenner Institute Laboratories, Nuffield Department of Medicine, Oxford UniversityOxford, United Kingdom
| | - Hassan Mahomed
- South African Tuberculosis Vaccine Initiative and School of Child and Adolescent Health, Institute of Infectious Disease and Molecular Medicine, University of Cape TownCape Town, South Africa
| | - Willem A Hanekom
- South African Tuberculosis Vaccine Initiative and School of Child and Adolescent Health, Institute of Infectious Disease and Molecular Medicine, University of Cape TownCape Town, South Africa
| | - Thomas J Scriba
- South African Tuberculosis Vaccine Initiative and School of Child and Adolescent Health, Institute of Infectious Disease and Molecular Medicine, University of Cape TownCape Town, South Africa
- Correspondence: Dr. Thomas J. Scriba, South African Tuberculosis Vaccine Initiative, Werner and Beit Building, Anzio Road, Observatory 7925, Cape Town, South Africa, Fax: +27-214066693, e-mail:
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Axelsson-Robertson R, Loxton AG, Walzl G, Ehlers MM, Kock MM, Zumla A, Maeurer M. A broad profile of co-dominant epitopes shapes the peripheral Mycobacterium tuberculosis specific CD8+ T-cell immune response in South African patients with active tuberculosis. PLoS One 2013; 8:e58309. [PMID: 23555576 PMCID: PMC3608651 DOI: 10.1371/journal.pone.0058309] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Accepted: 02/01/2013] [Indexed: 11/18/2022] Open
Abstract
We studied major histocompatibility complex (MHC) class I peptide-presentation and nature of the antigen-specific CD8+ T-cell response from South African tuberculosis (TB) patients with active TB. 361 MHC class I binding epitopes were identified from three immunogenic TB proteins (ESAT-6 [Rv3875], Ag85B [Rv1886c], and TB10.4 [Rv0288], including amino acid variations for Rv0288, i.e., A10T, G13D, S27N, and A71S for MHC allotypes common in a South African population (e.g., human leukocyte antigen [HLA]-A*30, B*58, and C*07). Inter-allelic differences were identified regarding the broadness of the peptide-binding capacity. Mapping of frequencies of Mycobacterium tuberculosis (M. tb) antigen-specific CD8+ T-cells using 48 different multimers, including the newly constructed recombinant MHC class I alleles HLA-B*58:01 and C*0701, revealed a low frequency of CD8+ T-cell responses directed against a broad panel of co-dominant M. tb epitopes in the peripheral circulation of most patients. The antigen-specific responses were dominated by CD8+ T-cells with a precursor-like phenotype (CD45RA+CCR7+). The data show that the CD8+ T-cell response from patients with pulmonary TB (prior to treatment) is directed against subdominant epitopes derived from secreted and non-secreted M. tb antigens and that variant, natural occurring M. tb Rv0288 ligands, have a profound impact on T-cell recognition.
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Affiliation(s)
| | - André G. Loxton
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research and MRC Centre for Molecular and Cellular Biology, Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Health Sciences, Stellenbosch University, Stellenbosch, South Africa
| | - Gerhard Walzl
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research and MRC Centre for Molecular and Cellular Biology, Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Health Sciences, Stellenbosch University, Stellenbosch, South Africa
| | - Marthie M. Ehlers
- Department of Medical Microbiology, University of Pretoria/NHLS, Pretoria, South Africa
| | - Marleen M. Kock
- Department of Medical Microbiology, University of Pretoria/NHLS, Pretoria, South Africa
| | - Alimuddin Zumla
- Division of Infection and Immunity, University College London Medical School, London, United Kingdom
| | - Markus Maeurer
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institute, Stockholm, Sweden
- Therapeutic Immunology (TIM), Department of Laboratory Medicine, Karolinska Institutet and CAST, Karolinska University Hospital, Stockholm, Sweden
- * E-mail:
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Lindestam Arlehamn CS, Gerasimova A, Mele F, Henderson R, Swann J, Greenbaum JA, Kim Y, Sidney J, James EA, Taplitz R, McKinney DM, Kwok WW, Grey H, Sallusto F, Peters B, Sette A. Memory T cells in latent Mycobacterium tuberculosis infection are directed against three antigenic islands and largely contained in a CXCR3+CCR6+ Th1 subset. PLoS Pathog 2013; 9:e1003130. [PMID: 23358848 PMCID: PMC3554618 DOI: 10.1371/journal.ppat.1003130] [Citation(s) in RCA: 184] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 11/29/2012] [Indexed: 12/31/2022] Open
Abstract
An understanding of the immunological footprint of Mycobacterium tuberculosis (MTB) CD4 T cell recognition is still incomplete. Here we report that human Th1 cells specific for MTB are largely contained in a CXCR3+CCR6+ memory subset and highly focused on three broadly immunodominant antigenic islands, all related to bacterial secretion systems. Our results refute the notion that secreted antigens act as a decoy, since both secreted proteins and proteins comprising the secretion system itself are targeted by a fully functional T cell response. In addition, several novel T cell antigens were identified which can be of potential diagnostic use, or as vaccine antigens. These results underline the power of a truly unbiased, genome-wide, analysis of CD4 MTB recognition based on the combined use of epitope predictions, high throughput ELISPOT, and T cell libraries using PBMCs from individuals latently infected with MTB. Mycobacterium tuberculosis is one of the most life-threatening pathogens of all time, having infected one-third of the present human population. There is an urgent need for both novel vaccines and diagnostic strategies. Here, we were able to identify the targets most dominantly recognized by latently infected individual that successfully contain infection. These targets are contained in three broadly genomic antigenic islands, all related to bacterial secretion systems and composed by several distinct ORFs. Thus, our results suggest that vaccination with one or few defined antigens will fail to replicate the response associated with natural immunity. Our analysis also pinpoints that the Th1 cells dominating the response are associated with novel and well-defined phenotypic markers, suggesting that the response is molded by unique MTB associated factors. This study demonstrates further that the approach combining peptide binding predictions with modern high throughput techniques is generally applicable to the study of immunity to other complex pathogens. Together, our data provide a new angle in the worldwide fight against M. tuberculosis and could be used for diagnostic or vaccine developments.
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Affiliation(s)
| | - Anna Gerasimova
- La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - Federico Mele
- Institute for Research in Biomedicine, Bellinzona, Switzerland
| | - Ryan Henderson
- La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - Justine Swann
- La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - Jason A. Greenbaum
- La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - Yohan Kim
- La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - John Sidney
- La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - Eddie A. James
- Benaroya Research Institute, Seattle, Washington, United States of America
| | - Randy Taplitz
- Antiviral Research Centre, University of California, San Diego, San Diego, California, United States of America
| | - Denise M. McKinney
- La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - William W. Kwok
- Benaroya Research Institute, Seattle, Washington, United States of America
| | - Howard Grey
- La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | | | - Bjoern Peters
- La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
| | - Alessandro Sette
- La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America
- * E-mail:
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Agnone A, La Manna MP, Loria GR, Puleio R, Villari S, Nicholas RAJ, Guggino G, Sireci G. Timing of activation of CD4+ memory cells as a possible marker to establish the efficacy of vaccines against contagious agalactia in sheep. Vet Immunol Immunopathol 2012; 152:252-9. [PMID: 23333193 DOI: 10.1016/j.vetimm.2012.12.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 12/19/2012] [Accepted: 12/20/2012] [Indexed: 10/27/2022]
Abstract
Mycoplasma agalactiae is a major pathogen of sheep and goats in many areas of the world and particularly in Mediterranean countries. It causes contagious agalactia, an infectious disease primarily affecting mammary glands. Many vaccines against the pathogen are currently under development. The aim of the study was to investigate the involvement of T cell-mediated immunity during vaccination and challenge experiments against Mycoplasma agalactiae. A comparison of the antigen-specific expansion of interferon gamma positive T cell memory and naïve subsets was performed between vaccinated and non-vaccinated sheep to identify cellular subsets whose activation was different between protected and non-protected sheep. Data reported in this manuscript demonstrated that two out of the three vaccines used in this study protected sheep from the disease. In the protected groups CD4(+) memory interferon-γ(+) T cells underwent an early expansion (p<0.05 when compared to unprotected groups), whilst memory CD8(+) Interferon-γ(+) T cells increased in non-protected animals 7 days after infection (p<0.05). γδ(+) Interferon-γ(+) T cells reached peaks of expansion in infected and in two vaccinated groups thus indicating that these cells are not preferentially involved in protection or pathogenesis (p<0.05). Hereby we propose that the early activation of CD4(+) memory Interferon-γ(+) T cells could be considered as a marker of protection from the disease as well as a tool to establish vaccine efficacy.
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Affiliation(s)
- Annalisa Agnone
- Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi, Università di Palermo, Corso Tukory 211, Palermo, Italy
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de Sousa EM, da Costa AC, Trentini MM, de Araújo Filho JA, Kipnis A, Junqueira-Kipnis AP. Immunogenicity of a fusion protein containing immunodominant epitopes of Ag85C, MPT51, and HspX from Mycobacterium tuberculosis in mice and active TB infection. PLoS One 2012; 7:e47781. [PMID: 23133523 PMCID: PMC3485045 DOI: 10.1371/journal.pone.0047781] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Accepted: 09/17/2012] [Indexed: 12/29/2022] Open
Abstract
Tuberculosis (TB) remains a major global health problem. The only vaccine against tuberculosis, attenuated Mycobacterium bovis Bacillus Calmette-Guerin (BCG), has demonstrated relatively low efficacy and does not provide satisfactory protection against the disease in adults. More effective vaccines and better therapies are urgently needed to reduce the global spread of TB. This study evaluated the immunogenicity of a recombinant M. tuberculosis Ag85C-MPT51-HspX fusion protein (CMX) in mice and individuals with active tuberculosis. BALB/c mice were immunized with the CMX protein liposome-encapsulated with CpG DNA or with CpGDNA liposome-encapsulated, liposome or saline as negative controls. The immunization produced high levels of anti-CMX -specific IgG1 and IgG2a antibodies and induced an increase in the relative and absolute numbers of specific TCD4 IFN-γ+ and TNF-α+ cells in the spleen. Sera from a cohort of individuals with active tuberculosis contained higher levels of IgG and IgM that recognized CMX when compared to healthy individuals. In conclusion, this protein was shown to be immunogenic both in mice and humans.
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Affiliation(s)
- Eduardo Martins de Sousa
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Adeliane Castro da Costa
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Monalisa Martins Trentini
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | | | - André Kipnis
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Ana Paula Junqueira-Kipnis
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
- * E-mail:
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Abstract
PURPOSE OF REVIEW Even in the era of promising molecular diagnostics for tuberculosis, understanding of the immune response remains urgent and fundamental to combating paediatric tuberculosis, given its paucibacillary nature. RECENT FINDINGS Significant advances have been made in unravelling the contributions of previously underappreciated components of the immune response to Mycobacterium tuberculosis. Research into the role of the 'innate' immune system such as neutrophils alongside 'adaptive' cells such as CD4(+), CD8(+), polyfunctional and regulatory T cells has highlighted the complexity of their interactions. Lessons from children with congenital or acquired susceptibility to mycobacterial disease, including HIV, continue to illuminate a broader understanding of the host immune response. The role of vitamin D is becoming apparent and highlights the importance of the environmental and clinical context of patients, especially in high prevalence areas. Several approaches show promise as diagnostic tests and in monitoring treatment response, although distinguishing latent from active disease remains a challenge. SUMMARY Research into novel immunological biomarkers, and greater understanding of the complex network of interactions between the innate and adaptive immune systems, is key to understanding why following exposure some children are unaffected, others latently infected and yet another group succumb to disease.
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Cattamanchi A, Ssewenyana I, Nabatanzi R, Miller CR, Den Boon S, Davis JL, Andama A, Worodria W, Yoo SD, Cao H, Huang L. Bronchoalveolar lavage enzyme-linked immunospot for diagnosis of smear-negative tuberculosis in HIV-infected patients. PLoS One 2012; 7:e39838. [PMID: 22745833 PMCID: PMC3383728 DOI: 10.1371/journal.pone.0039838] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Accepted: 05/28/2012] [Indexed: 11/30/2022] Open
Abstract
Background Peripheral blood interferon-gamma release assays (IGRAs) have sub-optimal sensitivity and specificity for diagnosis of active pulmonary tuberculosis (TB). However, assessment of local immune responses has been reported to improve the accuracy of TB diagnosis. Methods We enrolled HIV-infected adults with cough ≥2 weeks’ duration admitted to Mulago Hospital in Kampala, Uganda and referred for bronchoscopy following two negative sputum acid-fast bacillus smears. We performed an ELISPOT-based IGRA (T-SPOT.TB®, Oxford Immunotec, Oxford, UK) using peripheral blood and bronchoalveolar lavage (BAL) fluid mononuclear cells, and determined the accuracy of IGRAs using mycobacterial culture results as a reference standard. Results 94 HIV-infected patients with paired peripheral blood and BAL IGRA results were included. The study population was young (median age 34 years [IQR 28–40 years]) and had advanced HIV/AIDS (median CD4+ T-lymphocyte count 60 cells/µl [IQR 22–200 cells/µl]). The proportion of indeterminate IGRA results was higher in BAL fluid than in peripheral blood specimens (34% vs. 14%, difference 20%, 95% CI 7–33%, p = 0.002). BAL IGRA had moderate sensitivity (73%, 95% CI 50–89%) but poor specificity (48%, 95% CI 32–64%) for TB diagnosis. Sensitivity was similar (75%, 95% CI 57–89%) and specificity was higher (78%, 95% CI 63–88%) when IGRA was performed on peripheral blood. Conclusions BAL IGRA performed poorly for the diagnosis of smear-negative TB in a high HIV/TB burden setting. Further studies are needed to examine reasons for the large proportion of indeterminate results and low specificity of BAL IGRA for active TB in high HIV/TB burden settings.
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Affiliation(s)
- Adithya Cattamanchi
- Division of Pulmonary and Critical Care Medicine, San Francisco General Hospital, University of California San Francisco, San Francisco, California, United States of America.
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Assessment of the immune responses induced in cattle after inoculation of a Mycobacterium bovis strain deleted in two mce2 genes. J Biomed Biotechnol 2012; 2012:258353. [PMID: 22719207 PMCID: PMC3374952 DOI: 10.1155/2012/258353] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Accepted: 04/11/2012] [Indexed: 11/29/2022] Open
Abstract
The generation of efficient candidate vaccines against bovine tuberculosis will contribute to the control of this zoonotic disease. Rationally attenuated Mycobacterium bovis strains generated by knockout of virulence genes are promising candidate vaccines. However, to be effective, these candidate vaccines should at least maintain the immunological properties of their virulent parental M. bovis strains. Therefore, the aim of this study was to obtain an M. bovis strain deleted in the mce2 genes and evaluate the effect of the mutation on the immunological profile elicited by the bacteria in cattle. We showed that the activation of CD4+ T cells in cattle inoculated with the mutant strain was equivalent to that in animals inoculated with the parental strain. Moreover, after in vitro stimulation, peripheral blood mononuclear cells from animals inoculated with the mutant produced higher levels of mRNA Th-1 cytokines than the parental strain. Therefore, these results indicate that the mce2 mutant is a promising candidate vaccine against bovine tuberculosis.
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Cellular and humoral mechanisms involved in the control of tuberculosis. Clin Dev Immunol 2012; 2012:193923. [PMID: 22666281 PMCID: PMC3362816 DOI: 10.1155/2012/193923] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2011] [Revised: 03/06/2012] [Accepted: 03/06/2012] [Indexed: 02/08/2023]
Abstract
Mycobacterium tuberculosis (Mtb) infection is a major international public health problem. One-third of the world's population is thought to have latent tuberculosis, a condition where individuals are infected by the intracellular bacteria without active disease but are at risk for reactivation, if their immune system fails. Here, we discuss the role of nonspecific inflammatory responses mediated by cytokines and chemokines induced by interaction of innate receptors expressed in macrophages and dendritic cells (DCs). We also review current information regarding the importance of several cytokines including IL-17/IL-23 in the development of protective cellular and antibody-mediated protective responses against Mtb and their influence in containment of the infection. Finally, in this paper, emphasis is placed on the mechanisms of failure of Mtb control, including the immune dysregulation induced by the treatment with biological drugs in different autoimmune diseases. Further functional studies, focused on the mechanisms involved in the early host-Mtb interactions and the interplay between host innate and acquired immunity against Mtb, may be helpful to improve the understanding of protective responses in the lung and in the development of novel therapeutic and prophylactic tools in TB.
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Axelsson-Robertson R, Magalhaes I, Parida SK, Zumla A, Maeurer M. The Immunological Footprint of Mycobacterium tuberculosis T-cell Epitope Recognition. J Infect Dis 2012; 205 Suppl 2:S301-15. [DOI: 10.1093/infdis/jis198] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Abstract
In this review we discuss recent progress in the development, testing, and clinical evaluation of new vaccines against tuberculosis (TB). Over the last 20 years, tremendous progress has been made in TB vaccine research and development: from a pipeline virtually empty of new TB candidate vaccines in the early 1990s, to an era in which a dozen novel TB vaccine candidates have been and are being evaluated in human clinical trials. In addition, innovative approaches are being pursued to further improve existing vaccines, as well as discover new ones. Thus, there is good reason for optimism in the field of TB vaccines that it will be possible to develop better vaccines than BCG, which is still the only vaccine available against TB.
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Affiliation(s)
- Tom H M Ottenhoff
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands.
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Rahman S, Magalhaes I, Rahman J, Ahmed RK, Sizemore DR, Scanga CA, Weichold F, Verreck F, Kondova I, Sadoff J, Thorstensson R, Spångberg M, Svensson M, Andersson J, Maeurer M, Brighenti S. Prime-boost vaccination with rBCG/rAd35 enhances CD8⁺ cytolytic T-cell responses in lesions from Mycobacterium tuberculosis-infected primates. Mol Med 2012; 18:647-58. [PMID: 22396020 DOI: 10.2119/molmed.2011.00222] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Accepted: 02/28/2012] [Indexed: 12/27/2022] Open
Abstract
To prevent the global spread of tuberculosis (TB) infection, a novel vaccine that triggers potent and long-lived immunity is urgently required. A plasmid-based vaccine has been developed to enhance activation of major histocompatibility complex (MHC) class I-restricted CD8⁺ cytolytic T cells using a recombinant Bacille Calmette-Guérin (rBCG) expressing a pore-forming toxin and the Mycobacterium tuberculosis (Mtb) antigens Ag85A, 85B and TB10.4 followed by a booster with a nonreplicating adenovirus 35 (rAd35) vaccine vector encoding the same Mtb antigens. Here, the capacity of the rBCG/rAd35 vaccine to induce protective and biologically relevant CD8⁺ T-cell responses in a nonhuman primate model of TB was investigated. After prime/boost immunizations and challenge with virulent Mtb in rhesus macaques, quantification of immune responses at the single-cell level in cryopreserved tissue specimen from infected organs was performed using in situ computerized image analysis as a technological platform. Significantly elevated levels of CD3⁺ and CD8⁺ T cells as well as cells expressing interleukin (IL)-7, perforin and granulysin were found in TB lung lesions and spleen from rBCG/rAd35-vaccinated animals compared with BCG/rAd35-vaccinated or unvaccinated animals. The local increase in CD8⁺ cytolytic T cells correlated with reduced expression of the Mtb antigen MPT64 and also with prolonged survival after the challenge. Our observations suggest that a protective immune response in rBCG/rAd35-vaccinated nonhuman primates was associated with enhanced MHC class I antigen presentation and activation of CD8⁺ effector T-cell responses at the local site of infection in Mtb-challenged animals.
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Affiliation(s)
- Sayma Rahman
- Center for Infectious Medicine, Department of Medicine, Karolinska Institute, Karolinska University Hospital Huddinge, Stockholm, Sweden
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Khamesipour A, Nateghi Rostami M, Tasbihi M, Miramin Mohammadi A, Shahrestani T, Sarrafnejad A, Sohrabi Y, Eskandari SE, Keshavarz Valian H. Phenotyping of circulating CD8⁺ T cell subsets in human cutaneous leishmaniasis. Microbes Infect 2012; 14:702-11. [PMID: 22421108 DOI: 10.1016/j.micinf.2012.02.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Revised: 02/15/2012] [Accepted: 02/16/2012] [Indexed: 11/25/2022]
Abstract
Recovery from CL is usually accompanied with long-lasting protection and induction of strong immune response. The phenotypes, generation and maintenance of central (=T(CM)) and effector (=T(EM)) memory T cell subsets in human leishmaniasis are not well known. Profile of T cell subsets were analyzed on peripheral CD8⁺ T cells from volunteers with history of cutaneous leishmaniasis (HCL). In HCL and control groups, mean frequencies of CCR7⁺CD45RA⁺CD8⁺ naïve and CCR7⁻CD45RA⁻CD8⁺ T(EM) cells were higher than other subsets before culture, but after stimulation with soluble Leishmania antigen, the frequency of naïve T cells was significantly decreased and the frequency of T(EM) cells was significantly increased. T(EM) phenotype composed the highest portion of proliferating Carboxy Fluorescein diacetate Succinimidyl Ester (CFSE)-dim population which was significantly higher in HCL volunteers than in control group. Stimulation of isolated CD8⁺ memory T cells, but not naïve T cells, from HCL volunteers induced a significantly higher IFN-γ production compared with that of healthy controls. Intracellular IFN-γ staining provided the same result. Memory population is shown to be responsible for Leishmania-induced IFN-γ production. Leishmania-reactive proliferating T(EM) cells were identified as the most frequent subset which may play a role in recall immune response and protection against Leishmania infection.
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Affiliation(s)
- Ali Khamesipour
- Center for Research and Training in Skin Diseases and Leprosy, Tehran University of Medical Sciences, P.O. Box 14155-6383, Tehran, Iran
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Agnone A, Torina A, Vesco G, Villari S, Vitale F, Caracappa S, La Manna MP, Dieli F, Sireci G. Antigen-specific T cells and cytokines detection as useful tool for understanding immunity against zoonotic infections. Clin Dev Immunol 2012; 2012:768789. [PMID: 22400039 PMCID: PMC3287062 DOI: 10.1155/2012/768789] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 11/04/2011] [Accepted: 11/07/2011] [Indexed: 01/09/2023]
Abstract
Zoonoses include a broad range of diseases, that are becoming of great interest, due to the climate changing, that cause the adaptation of vectors to new niches and environments. Host immune responses play a crucial role in determining the outcome of infections, as documented by expansion of antigen-specific T cells during several zoonotic infections. Thus, understanding of the contribution of antigen-specific T-cell subsets in the host immune response is a powerful tool to evaluate the different immunological mechanisms involved in zoonotic infections and for the development of effective vaccines. In this paper we discuss the role of T cells in some eukaryotic and prokaryotic infectious models.
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Affiliation(s)
- Annalisa Agnone
- Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi (DiBiMeF), Università di Palermo, Corso Tukory 211, 90134 Palermo, Italy
| | - Alessandra Torina
- Istituto Zooprofilattico Sperimentale della Sicilia, Via Gino Marinuzzi 3, 90129 Palermo, Italy
| | - Gesualdo Vesco
- Istituto Zooprofilattico Sperimentale della Sicilia, Via Gino Marinuzzi 3, 90129 Palermo, Italy
| | - Sara Villari
- Istituto Zooprofilattico Sperimentale della Sicilia, Via Gino Marinuzzi 3, 90129 Palermo, Italy
| | - Fabrizio Vitale
- Istituto Zooprofilattico Sperimentale della Sicilia, Via Gino Marinuzzi 3, 90129 Palermo, Italy
| | - Santo Caracappa
- Istituto Zooprofilattico Sperimentale della Sicilia, Via Gino Marinuzzi 3, 90129 Palermo, Italy
| | - Marco Pio La Manna
- Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi (DiBiMeF), Università di Palermo, Corso Tukory 211, 90134 Palermo, Italy
| | - Francesco Dieli
- Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi (DiBiMeF), Università di Palermo, Corso Tukory 211, 90134 Palermo, Italy
| | - Guido Sireci
- Dipartimento di Biopatologia e Biotecnologie Mediche e Forensi (DiBiMeF), Università di Palermo, Corso Tukory 211, 90134 Palermo, Italy
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Lancioni C, Nyendak M, Kiguli S, Zalwango S, Mori T, Mayanja-Kizza H, Balyejusa S, Null M, Baseke J, Mulindwa D, Byrd L, Swarbrick G, Scott C, Johnson DF, Malone L, Mudido-Musoke P, Boom WH, Lewinsohn DM, Lewinsohn DA. CD8+ T cells provide an immunologic signature of tuberculosis in young children. Am J Respir Crit Care Med 2011; 185:206-12. [PMID: 22071329 DOI: 10.1164/rccm.201107-1355oc] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
RATIONALE The immunologic events surrounding primary Mycobacterium tuberculosis infection and development of tuberculosis remain controversial. Young children who develop tuberculosis do so quickly after first exposure, thus permitting study of immune response to primary infection and disease. We hypothesized that M. tuberculosis-specific CD8(+) T cells are generated in response to high bacillary loads occurring during tuberculosis. OBJECTIVES To determine if M. tuberculosis-specific T cells are generated among healthy children exposed to M. tuberculosis and children with tuberculosis. METHODS Enzyme-linked immunosorbent spot assays were used to measure IFN-γ production in response to M. tuberculosis-specific proteins ESAT-6/CFP-10 by peripheral blood mononuclear cells and CD8(+) T cells isolated from Ugandan children hospitalized with tuberculosis (n = 96) or healthy tuberculosis contacts (n = 62). MEASUREMENTS AND MAIN RESULTS The proportion of positive CD8(+) T-cell assays and magnitude of CD8(+) T-cell responses were significantly greater among young (<5 yr) tuberculosis cases compared with young contacts (P = 0.02, Fisher exact test, P = 0.01, Wilcoxon rank-sum, respectively). M. tuberculosis-specific T-cell responses measured in peripheral blood mononuclear cells were equivalent between groups. CONCLUSIONS Among young children, M. tuberculosis-specific CD8(+) T cells develop in response to high bacillary loads, as occurs during tuberculosis, and are unlikely to be found after M. tuberculosis exposure. T-cell responses measured in peripheral blood mononuclear cells are generated after M. tuberculosis exposure alone, and thus cannot distinguish exposure from disease. In young children, IFN-γ-producing M. tuberculosis-specific CD8(+) T cells provide an immunologic signature of primary M. tuberculosis infection resulting in disease.
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Affiliation(s)
- Christina Lancioni
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, USA.
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Tang ST, van Meijgaarden KE, Caccamo N, Guggino G, Klein MR, van Weeren P, Kazi F, Stryhn A, Zaigler A, Sahin U, Buus S, Dieli F, Lund O, Ottenhoff THM. Genome-based in silico identification of new Mycobacterium tuberculosis antigens activating polyfunctional CD8+ T cells in human tuberculosis. THE JOURNAL OF IMMUNOLOGY 2010; 186:1068-80. [PMID: 21169544 DOI: 10.4049/jimmunol.1002212] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although CD8(+) T cells help control Mycobacterium tuberculosis infection, their M. tuberculosis Ag repertoire, in vivo frequency, and functionality in human tuberculosis (TB) remains largely undefined. We have performed genome-based bioinformatics searches to identify new M. tuberculosis epitopes presented by major HLA class I supertypes A2, A3, and B7 (covering 80% of the human population). A total of 432 M. tuberculosis peptides predicted to bind to HLA-A*0201, HLA-A*0301, and HLA-B*0702 (representing the above supertypes) were synthesized and HLA-binding affinities determined. Peptide-specific CD8(+) T cell proliferation assays (CFSE dilution) in 41 M. tuberculosis-responsive donors identified 70 new M. tuberculosis epitopes. Using HLA/peptide tetramers for the 18 most prominently recognized HLA-A*0201-binding M. tuberculosis peptides, recognition by cured TB patients' CD8(+) T cells was validated for all 18 epitopes. Intracellular cytokine staining for IFN-γ, IL-2, and TNF-α revealed mono-, dual-, as well as triple-positive CD8(+) T cells, indicating these M. tuberculosis peptide-specific CD8(+) T cells were (poly)functional. Moreover, these T cells were primed during natural infection, because they were absent from M. tuberculosis-noninfected individuals. Control CMV peptide/HLA-A*0201 tetramers stained CD8(+) T cells in M. tuberculosis-infected and noninfected individuals equally, whereas Ebola peptide/HLA-A*0201 tetramers were negative. In conclusion, the M. tuberculosis-epitope/Ag repertoire for human CD8(+) T cells is much broader than hitherto suspected, and the newly identified M. tuberculosis Ags are recognized by (poly)functional CD8(+) T cells during control of infection. These results impact on TB-vaccine design and biomarker identification.
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Affiliation(s)
- Sheila T Tang
- Center for Biological Sequence Analysis, Technical University of Denmark, 2800 Lyngby, Denmark
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Immunostimulatory activity of major membrane protein II from Mycobacterium tuberculosis. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2010; 18:235-42. [PMID: 21159924 DOI: 10.1128/cvi.00459-10] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Previously, we observed that both major membrane protein II of Mycobacterium leprae (MMP-ML) and its fusion with M. bovis BCG (BCG)-derived heat shock protein 70 (HSP70) (Fusion-ML) are immunogenic and that recombinant BCG secreting either of these proteins effectively inhibits the multiplication of M. leprae in mice. Here, we purified M. tuberculosis-derived major membrane protein II (MMP-MTB) and its fusion with HSP70 (Fusion-MTB) in a lipopolysaccharide-free condition and evaluated their immunostimulatory abilities. Both MMP-MTB and Fusion-MTB activated monocyte-derived dendritic cells (DC) in terms of phenotype and interleukin-12 (IL-12) production, but Fusion-MTB more efficiently activated them than MMP-MTB did. The IL-12 production was a consequence of the ligation of those recombinant proteins with Toll-like receptor 2. The M. tuberculosis-derived and M. leprae-derived recombinant proteins activated naïve T cells of both CD4 and CD8 subsets, but M. tuberculosis-derived proteins were superior to M. leprae-derived proteins and fusion proteins were superior to MMP, regardless of the origin of the protein. Memory-type CD4(+) T cells obtained from BCG-vaccinated healthy individuals seem to be primed with MMP-MTB by the vaccination, and both M. tuberculosis-derived recombinant proteins produced perforin-producing CD8(+) T cells from memory-type CD8(+) T cells. Further, infection of DC and macrophages with M. tuberculosis H37Ra and H37Rv induced the expression of MMP on their surface. These results indicate that M. tuberculosis-derived MMP, as a sole protein or as part of a fusion protein, may be useful for developing new vaccinating agents against tuberculosis.
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Deng YH, Sun Z, Yang XL, Bao L. Improved immunogenicity of recombinant Mycobacterium bovis bacillus Calmette-Guérin strains expressing fusion protein Ag85A-ESAT-6 of Mycobacterium tuberculosis. Scand J Immunol 2010; 72:332-8. [PMID: 20883318 DOI: 10.1111/j.1365-3083.2010.02444.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Early secretory antigen target 6 (ESAT-6) is a dominant target for cell-mediated immunity in the early phase of tuberculosis (TB) in patients with TB, causing T-cell proliferation and gamma interferon (IFN-γ) production, which has been considered to be a protective antigen that can be used for future vaccine development. Ag85A is the most essential component for bacterial survival within macrophages and has been used in numerous vaccine preparations, which can induce strong cellular immune responses. In this study, we constructed a new recombinant bacilli Calmette-Guérin (BCG) strain (rBCG-AE) that could express fusion protein Ag85A-ESAT-6 of Mycobacterium tuberculosis and evaluated its immunogenicity in BALB/c mice. There was no evidence for increased virulence of this rBCG. Our experiments illustrated that the rBCG-AE was able to induce higher titer of antibody and elicit more long-lasting and stronger Th1 type cellular immune responses than the parental BCG strain, or rBCG-A (expressing Ag85A) strain, or rBCG-E (expressing ESAT-6) strain, which are characterized by the strong antibody response, the proliferation rate of splenocytes, the ratio of CD4(+) T and CD8(+) T cells stimulated by tuberculin-purified protein derivative and elevated levels of IFN-γ in antigen-stimulated splenocyte cultures. The results show that rBCG-AE is an improved TB vaccine for further study.
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Affiliation(s)
- Y H Deng
- Laboratory of Infection and Immunity, West China Center of Medical sciences, Sichuan University, Chengdu, China
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Brighenti S, Andersson J. Induction and regulation of CD8+ cytolytic T cells in human tuberculosis and HIV infection. Biochem Biophys Res Commun 2010; 396:50-7. [DOI: 10.1016/j.bbrc.2010.02.141] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Accepted: 02/20/2010] [Indexed: 12/15/2022]
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Tena-Coki NG, Scriba TJ, Peteni N, Eley B, Wilkinson RJ, Andersen P, Hanekom WA, Kampmann B. CD4 and CD8 T-cell responses to mycobacterial antigens in African children. Am J Respir Crit Care Med 2010; 182:120-9. [PMID: 20224065 DOI: 10.1164/rccm.200912-1862oc] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE The current tuberculosis (TB) vaccine, bacille Calmette-Guérin (BCG), does not provide adequate protection against TB disease in children. Furthermore, more efficacious TB vaccines are needed for children with immunodeficiencies such as HIV infection, who are at highest risk of disease. OBJECTIVES To characterize mycobacteria-specific T cells in children who might benefit from vaccination against TB, focusing on responses to antigens contained in novel TB vaccines. METHODS Whole blood was collected from three groups of BCG-vaccinated children: HIV-seronegative children receiving TB treatment (n = 30), HIV-infected children (n = 30), and HIV-unexposed healthy children (n = 30). Blood was stimulated with Ag85B and TB10.4, or purified protein derivative, and T-cell cytokine production by CD4 and CD8 was determined by flow cytometry. The memory phenotype of antigen-specific CD4 and CD8 T cells was also determined. MEASUREMENTS AND MAIN RESULTS Mycobacteria-specific CD4 and CD8 T-cell responses were detectable in all three groups of children. Children receiving TB treatment had significantly higher frequencies of antigen-specific CD4 T cells compared with HIV-infected children (P = 0.0176). No significant differences in magnitude, function, or phenotype of specific T cells were observed in HIV-infected children compared with healthy control subjects. CD4 T cells expressing IFN-gamma, IL-2, or both expressed a CD45RA(-)CCR7(-)CD27(+/-) effector memory phenotype. Mycobacteria-specific CD8 T cells expressed mostly IFN-gamma in all groups of children; these cells expressed CD45RA(-)CCR7(-)CD27(+/-) or CD45RA(+)CCR7(-)CD27(+/-) effector memory phenotypes. CONCLUSIONS Mycobacteria-specific T-cell responses could be demonstrated in all groups of children, suggesting that the responses could be boosted by new TB vaccines currently in clinical trials.
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Affiliation(s)
- Nontobeko G Tena-Coki
- Institute of Infectious Diseases and Molecular Medicine, South African Tuberculosis Vaccine Initiative, and School of Child and Adolescent Health, University of Cape Town, Cape Town, South Africa
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Association of mycobacterial antigen-specific CD4+ memory T cell subsets with outcome of pulmonary tuberculosis. J Infect 2010; 60:133-9. [DOI: 10.1016/j.jinf.2009.10.048] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Revised: 10/18/2009] [Accepted: 10/19/2009] [Indexed: 01/19/2023]
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High granulocyte/lymphocyte ratio and paucity of NKT cells defines TB disease in a TB-endemic setting. Tuberculosis (Edinb) 2009; 89:398-404. [PMID: 19683473 DOI: 10.1016/j.tube.2009.07.004] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2009] [Revised: 06/03/2009] [Accepted: 07/13/2009] [Indexed: 12/21/2022]
Abstract
Most people infected with Mycobacterium tuberculosis, the causative agent of tuberculosis (TB) actually maintain a strong immune response and are able to control bacterial growth (deemed latently infected (LTBI)), while approximately 10% progress to disease resulting in almost 2 million deaths per year. Determining the immune 'footprint' at specific stages of infection and disease will allow for better diagnostics, treatments and ultimately development of new vaccine candidates. In this study we performed multi-factorial flow cytometry on fresh blood from 56 TB cases, 46 Tuberculin Skin Test (TST) positive (LTBI) and 39 TST negative household contacts. We found a highly significant increase in granulocytes and decrease in B cells and invariant (Valpha24+Vbeta11+) NKT cells in TB cases compared to TST+ contacts (p<0.0001, p=0.007 and p=0.01 respectively) which were restored to LTBI levels following 6 months of TB treatment. Using support vector analysis, we found a combination of granulocyte and lymphocyte and/or NKT cell proportions allowed almost 90% correct classification into M. tuberculosis infection or disease. This work has important public health benefits in regards to diagnosis and treatment of TB in sub-Saharan Africa and in furthering our understanding of the requirements for protective immunity to TB.
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Walch M, Rampini SK, Stoeckli I, Latinovic-Golic S, Dumrese C, Sundstrom H, Vogetseder A, Marino J, Glauser DL, van den Broek M, Sander P, Groscurth P, Ziegler U. Involvement of CD252 (CD134L) and IL-2 in the expression of cytotoxic proteins in bacterial- or viral-activated human T cells. THE JOURNAL OF IMMUNOLOGY 2009; 182:7569-79. [PMID: 19494280 DOI: 10.4049/jimmunol.0800296] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Regulation of cytotoxic effector molecule expression in human CTLs after viral or bacterial activation is poorly understood. By using human autologous dendritic cells (DCs) to prime T lymphocytes, we found perforin only highly up-regulated in virus- (HSV-1, vaccinia virus) but not in intracellular bacteria- (Listeria innocua, Listeria monocytogenes, Mycobacterium tuberculosis, Chlamydophila pneumoniae) activated CTLs. In contrast, larger quantities of IFN-gamma and TNF-alpha were produced in Listeria-stimulated cultures. Granzyme B and granulysin were similarly up-regulated by all tested viruses and intracellular bacteria. DCs infected with HSV-1 showed enhanced surface expression of the costimulatory molecule CD252 (CD134L) compared with Listeria-infected DC and induced enhanced secretion of IL-2. Adding blocking CD134 or neutralizing IL-2 Abs during T cell activation reduced the HSV-dependent up-regulation of perforin. These data indicate a distinct CTL effector function in response to intracellular pathogens triggered via differing endogenous IL-2 production upon costimulation through CD252.
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Affiliation(s)
- Michael Walch
- Division of Cell Biology, Institute of Anatomy, University of Zurich, Zurich, Switzerland
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