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Erice PA, Huang X, Seasock MJ, Robertson MJ, Tung HY, Perez-Negron MA, Lotlikar SL, Corry DB, Kheradmand F, Rodriguez A. Downregulation of Mirlet7 miRNA family promotes Tc17 differentiation and emphysema via de-repression of RORγt. eLife 2024; 13:RP92879. [PMID: 38722677 PMCID: PMC11081633 DOI: 10.7554/elife.92879] [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] [Indexed: 05/12/2024] Open
Abstract
Environmental air irritants including nanosized carbon black (nCB) can drive systemic inflammation, promoting chronic obstructive pulmonary disease (COPD) and emphysema development. The let-7 microRNA (Mirlet7 miRNA) family is associated with IL-17-driven T cell inflammation, a canonical signature of lung inflammation. Recent evidence suggests the Mirlet7 family is downregulated in patients with COPD, however, whether this repression conveys a functional consequence on emphysema pathology has not been elucidated. Here, we show that overall expression of the Mirlet7 clusters, Mirlet7b/Mirlet7c2 and Mirlet7a1/Mirlet7f1/Mirlet7d, are reduced in the lungs and T cells of smokers with emphysema as well as in mice with cigarette smoke (CS)- or nCB-elicited emphysema. We demonstrate that loss of the Mirlet7b/Mirlet7c2 cluster in T cells predisposed mice to exaggerated CS- or nCB-elicited emphysema. Furthermore, ablation of the Mirlet7b/Mirlet7c2 cluster enhanced CD8+IL17a+ T cells (Tc17) formation in emphysema development in mice. Additionally, transgenic mice overexpressing Mirlet7g in T cells are resistant to Tc17 and CD4+IL17a+ T cells (Th17) development when exposed to nCB. Mechanistically, our findings reveal the master regulator of Tc17/Th17 differentiation, RAR-related orphan receptor gamma t (RORγt), as a direct target of Mirlet7 in T cells. Overall, our findings shed light on the Mirlet7/RORγt axis with Mirlet7 acting as a molecular brake in the generation of Tc17 cells and suggest a novel therapeutic approach for tempering the augmented IL-17-mediated response in emphysema.
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Affiliation(s)
- Phillip A Erice
- Immunology Graduate Program, Baylor College of MedicineHoustonUnited States
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of MedicineHoustonUnited States
| | - Xinyan Huang
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of MedicineHoustonUnited States
| | - Matthew J Seasock
- Immunology Graduate Program, Baylor College of MedicineHoustonUnited States
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of MedicineHoustonUnited States
| | - Matthew J Robertson
- Dan Duncan Comprehensive Cancer Center, Baylor College of MedicineHoustonUnited States
| | - Hui-Ying Tung
- Department of Pathology and Immunology, Baylor College of MedicineHoustonUnited States
| | - Melissa A Perez-Negron
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of MedicineHoustonUnited States
| | - Shivani L Lotlikar
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of MedicineHoustonUnited States
| | - David B Corry
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of MedicineHoustonUnited States
- Department of Pathology and Immunology, Baylor College of MedicineHoustonUnited States
- Center for Translational Research on Inflammatory Diseases, Michael E Debakey, Baylor College of MedicineHoustonUnited States
| | - Farrah Kheradmand
- Department of Pathology and Immunology, Baylor College of MedicineHoustonUnited States
- Center for Translational Research on Inflammatory Diseases, Michael E Debakey, Baylor College of MedicineHoustonUnited States
- Department of Medicine, Section of Pulmonary and Critical Care, Baylor College of MedicineHoustonUnited States
| | - Antony Rodriguez
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of MedicineHoustonUnited States
- Center for Translational Research on Inflammatory Diseases, Michael E Debakey, Baylor College of MedicineHoustonUnited States
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García-Vega M, Wan H, Reséndiz-Sandoval M, Hinojosa-Trujillo D, Valenzuela O, Mata-Haro V, Dehesa-Canseco F, Solís-Hernández M, Marcotte H, Pan-Hammarström Q, Hernández J. Comparative single-cell transcriptomic profile of hybrid immunity induced by adenovirus vector-based COVID-19 vaccines. Genes Immun 2024; 25:158-167. [PMID: 38570727 DOI: 10.1038/s41435-024-00270-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/20/2024] [Accepted: 03/25/2024] [Indexed: 04/05/2024]
Abstract
In this study, antibody response and a single-cell RNA-seq analysis were conducted on peripheral blood mononuclear cells from five different groups: naïve subjects vaccinated with AZD1222 (AZ) or Ad5-nCoV (Cso), individuals previously infected and later vaccinated (hybrid) with AZD1222 (AZ-hb) or Ad5-nCoV (Cso-hb), and those who were infected and had recovered from COVID-19 (Inf). The results showed that AZ induced more robust neutralizing antibody responses than Cso. The single-cell RNA data revealed a high frequency of memory B cells in the Cso and Cso-hb. In contrast, AZ and AZ-hb groups exhibited the highest proportion of activated naïve B cells expressing CXCR4. Transcriptomic analysis of CD4+ and CD8+ T cells demonstrated a heterogeneous response following vaccination, hybrid immunity, or natural infection. However, a single dose of Ad5-nCoV was sufficient to strongly activate CD4+ T cells (naïve and memory) expressing ANX1 and FOS, similar to the hybrid response observed with AZ. An interesting finding was the robust activation of a subset of CD8+ T cells expressing GZMB, GZMH, and IFNG genes in the Cso-hb group. Our findings suggest that both vaccines effectively stimulated the cellular immune response; however, the Ad5-nCoV induced a more robust CD8+ T-cell response in previously infected individuals.
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Affiliation(s)
- Melissa García-Vega
- Laboratorio de Inmunología, Centro de Investigación en Alimentación y Desarrollo, A.C, Hermosillo, Sonora, 83304, Mexico
| | - Hui Wan
- Division of Immunology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Solna, SE171 65, Sweden
| | - Mónica Reséndiz-Sandoval
- Laboratorio de Inmunología, Centro de Investigación en Alimentación y Desarrollo, A.C, Hermosillo, Sonora, 83304, Mexico
| | - Diana Hinojosa-Trujillo
- Laboratorio de Inmunología, Centro de Investigación en Alimentación y Desarrollo, A.C, Hermosillo, Sonora, 83304, Mexico
| | - Olivia Valenzuela
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, Hermosillo, Sonora, 83000, Mexico
| | - Verónica Mata-Haro
- Laboratorio de Inmunología, Centro de Investigación en Alimentación y Desarrollo, A.C, Hermosillo, Sonora, 83304, Mexico
| | - Freddy Dehesa-Canseco
- Comisión México-Estados Unidos para la Prevención de la Fiebre Aftosa y otras Enfermedades Exóticas de los Animales (CPA), SENASICA, SADER, Ciudad de México, 05010, Mexico
| | - Mario Solís-Hernández
- Comisión México-Estados Unidos para la Prevención de la Fiebre Aftosa y otras Enfermedades Exóticas de los Animales (CPA), SENASICA, SADER, Ciudad de México, 05010, Mexico
| | - Harold Marcotte
- Division of Immunology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Solna, SE171 65, Sweden
| | - Qiang Pan-Hammarström
- Division of Immunology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Solna, SE171 65, Sweden.
| | - Jesús Hernández
- Laboratorio de Inmunología, Centro de Investigación en Alimentación y Desarrollo, A.C, Hermosillo, Sonora, 83304, Mexico.
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3
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Erice PA, Huang X, Seasock MJ, Robertson MJ, Tung HY, Perez-Negron MA, Lotlikar SL, Corry DB, Kheradmand F, Rodriguez A. Downregulation of Let-7 miRNA promotes Tc17 differentiation and emphysema via de-repression of RORγt. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.10.12.562059. [PMID: 37905101 PMCID: PMC10614797 DOI: 10.1101/2023.10.12.562059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Environmental air irritants including nanosized carbon black (nCB) can drive systemic inflammation, promoting chronic obstructive pulmonary disease (COPD) and emphysema development. The let-7 family of miRNAs is associated with IL-17-driven T cell inflammation, a canonical signature of lung inflammation. Recent evidence suggests the let-7 family is downregulated in patients with COPD, however, whether this repression conveys a functional consequence on emphysema pathology has not been elucidated. Here we show that overall expression of the let-7 miRNA clusters, let-7b/let-7c2 and let-7a1/let-7f1/let-7d, are reduced in the lungs and T cells of smokers with emphysema as well as in mice with cigarette smoke (CS)- or nCB-elicited emphysema. We demonstrate that loss of the let-7b/let-7c2-cluster in T cells predisposed mice to exaggerated CS- or nCB-elicited emphysema. Furthermore, ablation of the let-7b/let-7c2-cluster enhanced CD8+IL17a+ T cells (Tc17) formation in emphysema development in mice. Additionally, transgenic mice overexpressing let-7 in T cells are resistant to Tc17 and CD4+IL17a+ T cells (Th17) development when exposed to nCB. Mechanistically, our findings reveal the master regulator of Tc17/Th17 differentiation, RAR-related orphan receptor gamma t (RORγt), as a direct target of let-7 miRNA in T cells. Overall, our findings shed light on the let-7/RORγt axis with let-7 acting as a molecular brake in the generation of Tc17 cells and suggests a novel therapeutic approach for tempering the augmented IL-17-mediated response in emphysema.
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Affiliation(s)
- Phillip A Erice
- Immunology Graduate Program, Baylor College of Medicine, Houston, TX, 77030
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of Medicine Houston TX, 77030
| | - Xinyan Huang
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of Medicine Houston TX, 77030
- Current address, Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Sun Yat-sen University. Guangzhou, Guangdong Province, P.R. China
| | - Matthew J Seasock
- Immunology Graduate Program, Baylor College of Medicine, Houston, TX, 77030
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of Medicine Houston TX, 77030
| | - Matthew J Robertson
- Dan Duncan Comprehensive Cancer Center, Baylor College of Medicine Houston, TX, 77030
| | - Hui-Ying Tung
- Department of Pathology and Immunology, Baylor College of Medicine Houston, TX, 77030
| | - Melissa A Perez-Negron
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of Medicine Houston TX, 77030
| | - Shivani L Lotlikar
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of Medicine Houston TX, 77030
| | - David B Corry
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of Medicine Houston TX, 77030
- Department of Pathology and Immunology, Baylor College of Medicine Houston, TX, 77030
- Center for Translational Research on Inflammatory Diseases, Michael E. Debakey, Baylor College of Medicine, Houston, TX, 77030
| | - Farrah Kheradmand
- Department of Pathology and Immunology, Baylor College of Medicine Houston, TX, 77030
- Department of Medicine, Section of Pulmonary and Critical Care, Baylor College of Medicine. Houston, TX, 77030
- Center for Translational Research on Inflammatory Diseases, Michael E. Debakey, Baylor College of Medicine, Houston, TX, 77030
| | - Antony Rodriguez
- Department of Medicine, Immunology & Allergy Rheumatology, Baylor College of Medicine Houston TX, 77030
- Center for Translational Research on Inflammatory Diseases, Michael E. Debakey, Baylor College of Medicine, Houston, TX, 77030
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Hipp AV, Bengsch B, Globig AM. Friend or Foe - Tc17 cell generation and current evidence for their importance in human disease. DISCOVERY IMMUNOLOGY 2023; 2:kyad010. [PMID: 38567057 PMCID: PMC10917240 DOI: 10.1093/discim/kyad010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/12/2023] [Accepted: 07/19/2023] [Indexed: 04/04/2024]
Abstract
The term Tc17 cells refers to interleukin 17 (IL-17)-producing CD8+ T cells. While IL-17 is an important mediator of mucosal defense, it is also centrally involved in driving the inflammatory response in immune-mediated diseases, such as psoriasis, multiple sclerosis, and inflammatory bowel disease. In this review, we aim to gather the current knowledge on the phenotypic and transcriptional profile, the in vitro and in vivo generation of Tc17 cells, and the evidence pointing towards a relevant role of Tc17 cells in human diseases such as infectious diseases, cancer, and immune-mediated diseases.
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Affiliation(s)
- Anna Veronika Hipp
- Clinic for Internal Medicine II, Gastroenterology, Hepatology, Endocrinology, and Infectious Diseases, University Medical Center Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Bertram Bengsch
- Clinic for Internal Medicine II, Gastroenterology, Hepatology, Endocrinology, and Infectious Diseases, University Medical Center Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Anna-Maria Globig
- Clinic for Internal Medicine II, Gastroenterology, Hepatology, Endocrinology, and Infectious Diseases, University Medical Center Freiburg, Faculty of Medicine, Freiburg, Germany
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Arra A, Lingel H, Pierau M, Brunner-Weinzierl MC. PD-1 limits differentiation and plasticity of Tc17 cells. Front Immunol 2023; 14:1104730. [PMID: 37205114 PMCID: PMC10186197 DOI: 10.3389/fimmu.2023.1104730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 04/05/2023] [Indexed: 05/21/2023] Open
Abstract
Blockade of surface co-inhibitory receptor programmed cell death-1 (PD-1; CD279) has been established as an important immunotherapeutic approach to treat malignancies. On a cellular level, PD-1 is demonstrated to be of particular importance in inhibiting differentiation and effector function of cytotoxic Tc1 cells (CTLs). Nevertheless, the role of PD-1 in modulating interleukin (IL)-17-producing CD8+ T-cells (Tc17 cells), which generally display suppressed cytotoxic nature, is not well understood. To evaluate the impact of PD-1 in Tc17 responses, we examined its functioning using different in vitro and in vivo models. Upon activation of CD8+ T-cells in Tc17 environment, we found that PD-1 was rapidly expressed on the surface of CD8+ T-cells and triggered a T-cell-internal mechanism that inhibited the expression of IL-17 and Tc17-supporting transcription factors pSTAT3 and RORγt. Expression of type17-polarising cytokine IL-21 and the receptor for IL-23 were also suppressed. Intriguingly, adoptively transferred, PD-1-/- Tc17 cells were highly efficient in rejection of established B16 melanoma in vivo and displayed Tc1 like characteristics ex vivo. When using IL-17A-eGFP reporter mice for in vitro fate tracking, IL-17A-eGFP expressing cells lacking PD-1 signaling upon re-stimulation with IL-12 quickly acquired Tc1 characteristics such as IFN-γ, and granzyme B expression, implicating lineage independent upregulation of CTL-characteristics that are needed for tumor control. In line with plasticity characteristics, absence of PD-1 signaling in Tc17 cells increased the expression of the stemness and persistence-associated molecules TCF1 and BCL6. Thus, PD-1 plays a central role in the specific suppression of Tc17 differentiation and its plasticity in relation to CTL-driven tumor rejection, which provides further explanation as to why the blockade of PD-1 is such an efficient therapeutic target for inducing tumor rejection.
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Affiliation(s)
- Aditya Arra
- Department of Experimental Pediatrics, University Hospital, Otto-von-Guericke-University, Magdeburg, Germany
- Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke-University, Magdeburg, Germany
| | - Holger Lingel
- Department of Experimental Pediatrics, University Hospital, Otto-von-Guericke-University, Magdeburg, Germany
- Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke-University, Magdeburg, Germany
| | - Mandy Pierau
- Department of Experimental Pediatrics, University Hospital, Otto-von-Guericke-University, Magdeburg, Germany
- Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke-University, Magdeburg, Germany
| | - Monika C. Brunner-Weinzierl
- Department of Experimental Pediatrics, University Hospital, Otto-von-Guericke-University, Magdeburg, Germany
- Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke-University, Magdeburg, Germany
- *Correspondence: Monika C. Brunner-Weinzierl,
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GM-CSF+ Tc17 cells are required to bolster vaccine immunity against lethal fungal pneumonia without causing overt pathology. Cell Rep 2022; 41:111543. [PMID: 36288707 PMCID: PMC9641983 DOI: 10.1016/j.celrep.2022.111543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 09/06/2022] [Accepted: 09/30/2022] [Indexed: 11/21/2022] Open
Abstract
GM-CSF co-expressing T17 cells instigate pathologic inflammation during autoimmune disorders, but their function in immunity to infections is unclear. Here, we demonstrate the role of GM-CSF+Tc17 cells for vaccine immunity against lethal fungal pneumonia and the cytokine requirements for their induction and memory homeostasis. Vaccine-induced GM-CSF+ Tc17 cells are necessary to bolster pulmonary fungal immunity without inflating pathology. Although GM-CSF expressing Tc17 cells preferentially elevate during the memory phase, their phenotypic attributes strongly suggest they are more like Tc17 cells than IFNγ-producing Tc1 cells. IL-1 and IL-23, but not GM-CSF, are necessary to elicit GM-CSF+Tc17 cells following vaccination. IL-23 is dispensable for memory Tc17 and GM-CSF+ Tc17 cell maintenance, but recall responses of effector or memory Tc17 cells in the lung require it. Our study reveals the beneficial, nonpathological role of GM-CSF+ Tc17 cells during fungal vaccine immunity. GM-CSF+ and IL-17A+ lineages of T cells are instrumental in controlling many fungal and bacterial infections and implicated in autoimmune pathology, host-microbial interactions at the mucosal surfaces, and neuro-immune nexus. Mudalagiriyappa et al. show that GM-CSF expressing Tc17 cells are necessary for mediating fungal vaccine immunity without augmenting pathology.
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Zhu Y, Xu Y, Hong L, Zhou C, Chen J. Immunization With a DNA Vaccine Encoding the Toxoplasma gondii' s GRA39 Prolongs Survival and Reduce Brain Cyst Formation in a Murine Model. Front Microbiol 2021; 12:630682. [PMID: 33995293 PMCID: PMC8113873 DOI: 10.3389/fmicb.2021.630682] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 03/29/2021] [Indexed: 12/02/2022] Open
Abstract
Toxoplasma gondii, an obligate intracellular protozoan parasite, can cause infect almost all warm-blooded animals and humans. To evaluate the immunogenicity and protective efficacy of T. gondii GRA39 (TgGRA39) in mice by using DNA immunization, we constructed a recombinant eukaryotic plasmid pVAX-TgGRA39. The specific immune responses in immunized mice were analyzed by serum antibody and cytokine measurements, lymphocyte proliferation assays and flow cytometry of T lymphocyte subclasses. Also, protective efficacy against acute and chronic T. gondii infection was assessed by observing the survival time after challenge with the highly virulent T. gondii RH strain (Genotype I) and counting the number of cyst-forming in brain at 4 weeks post-infection with the cyst-forming PRU strain of T. gondii (Genotype II), respectively. Our results showed that DNA immunization with pVAX-GRA39 via intramuscular injection three times, at 2-week intervals could elicit humoral and cellular immune response, indicated by enhanced levels of IgG and IgG2a antibodies (a slightly elevated IgG2a to IgG1 ratio), and increased levels of cytokines IFN-γ, IL-2, IL-12, IL-17A, IL-17F, IL-22 and IL-23 and percentages of CD3+ CD4+ CD8- and CD3+ CD8+ CD4– T cells, in contrast to non-immunized mice. The significant increase in the expression levels of IL-6, TGF-β1, IL-1β, and the transcription factor factors RORγt, RORα, and STAT3 involved in the activation and pathway of Th17 and Tc17 cells, were also observed. However, no significant difference was detected in level of IL-4 and IL-10 (p > 0.05). These effective immune responses had mounted protective immunity against T. gondii infection, with a prolonged survival time (16.80 ± 3.50 days) and reduced cyst numbers (44.5%) in comparison to the control mice. Our data indicated that pVAX-TgGRA39 could induce effective humoral, and Th1-type, Th17, and Tc17 cellular immune responses, and may represent a promising vaccine candidate against both acute and chronic T. gondii infection.
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Affiliation(s)
- Yuchao Zhu
- Department of Radiology, The Affiliated Hospital of Medical School of Ningbo University, Ningbo, China
| | - Yanan Xu
- The Ningbo Women and Children's Hospital, Ningbo, China
| | - Lu Hong
- Department of Radiology, The Affiliated Hospital of Medical School of Ningbo University, Ningbo, China
| | - Chunxue Zhou
- Department of Pathogen Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jia Chen
- Department of Radiology, The Affiliated Hospital of Medical School of Ningbo University, Ningbo, China.,The Ningbo Women and Children's Hospital, Ningbo, China
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Steel KJA, Srenathan U, Ridley M, Durham LE, Wu SY, Ryan SE, Hughes CD, Chan E, Kirkham BW, Taams LS. Polyfunctional, Proinflammatory, Tissue-Resident Memory Phenotype and Function of Synovial Interleukin-17A+CD8+ T Cells in Psoriatic Arthritis. Arthritis Rheumatol 2020; 72:435-447. [PMID: 31677365 PMCID: PMC7065207 DOI: 10.1002/art.41156] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 10/31/2019] [Indexed: 12/22/2022]
Abstract
Objective Genetic associations imply a role for CD8+ T cells and the interleukin‐23 (IL‐23)/IL‐17 axis in psoriatic arthritis (PsA) and other spondyloarthritides (SpA). IL‐17A+CD8+ (Tc17) T cells are enriched in the synovial fluid (SF) of patients with PsA, and IL‐17A blockade is clinically efficacious in PsA/SpA. This study was undertaken to determine the immunophenotype, molecular profile, and function of synovial Tc17 cells in order to elucidate their role in PsA/SpA pathogenesis. Methods Peripheral blood (PB) and SF mononuclear cells were isolated from patients with PsA or other types of SpA. Cells were phenotypically, transcriptionally, and functionally analyzed by flow cytometry (n = 6–18), T cell receptor β (TCRβ) sequencing (n = 3), RNA‐Seq (n = 3), quantitative reverse transcriptase–polymerase chain reaction (n = 4), and Luminex or enzyme‐linked immunosorbent assay (n = 4–16). Results IL‐17A+CD8+ T cells were predominantly TCRαβ+ and their frequencies were increased in the SF versus the PB of patients with established PsA (P < 0.0001) or other SpA (P = 0.0009). TCRβ sequencing showed that these cells were polyclonal in PsA (median clonality 0.08), while RNA‐Seq and deep immunophenotyping revealed that PsA synovial Tc17 cells had hallmarks of Th17 cells (RORC/IL23R/CCR6/CD161) and Tc1 cells (granzyme A/B). Synovial Tc17 cells showed a strong tissue‐resident memory T (Trm) cell signature and secreted a range of proinflammatory cytokines. We identified CXCR6 as a marker for synovial Tc17 cells, and increased levels of CXCR6 ligand CXCL16 in PsA SF (P = 0.0005), which may contribute to their retention in the joint. Conclusion Our results identify synovial Tc17 cells as a polyclonal subset of Trm cells characterized by polyfunctional, proinflammatory mediator production and CXCR6 expression. The molecular signature and functional profiling of these cells may help explain how Tc17 cells can contribute to synovial inflammation and disease persistence in PsA and possibly other types of SpA.
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Affiliation(s)
| | | | | | | | | | | | - Catherine D Hughes
- King's College London, Guy's Hospital, and St. Thomas' Hospital, London, UK
| | - Estee Chan
- Guy's Hospital and St. Thomas' Hospital, London, UK
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Ma WT, Yao XT, Peng Q, Chen DK. The protective and pathogenic roles of IL-17 in viral infections: friend or foe? Open Biol 2019; 9:190109. [PMID: 31337278 PMCID: PMC6685926 DOI: 10.1098/rsob.190109] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Viral infections cause substantial human morbidity and mortality, and are a significant health burden worldwide. Following a viral infection, the host may initiate complex antiviral immune responses to antagonize viral invasion and replication. However, proinflammatory antiviral immune responses pose a great threat to the host if not properly held in check. Interleukin (IL)-17 is a pleiotropic cytokine participating in a variety of physiological and pathophysiological conditions, including tissue integrity maintenance, cancer progression, autoimmune disease development and, more intriguingly, infectious diseases. Abundant evidence suggests that while IL-17 plays a crucial role in enhancing effective antiviral immune responses, it may also promote and exacerbate virus-induced illnesses. Accumulated experimental and clinical evidence has broadened our understanding of the seemingly paradoxical role of IL-17 in viral infections and suggests that IL-17-targeted immunotherapy may be a promising therapeutic option. Herein, we summarize current knowledge regarding the protective and pathogenic roles of IL-17 in viral infections, with emphasis on underlying mechanisms. The various and critical roles of IL-17 in viral infections necessitate the development of therapeutic strategies that are uniquely tailored to both the infectious agent and the infection environment.
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Affiliation(s)
- Wen-Tao Ma
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, Shaanxi Province, People's Republic of China
| | - Xiao-Ting Yao
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, Shaanxi Province, People's Republic of China
| | - Qun Peng
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, Shaanxi Province, People's Republic of China
| | - De-Kun Chen
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, Shaanxi Province, People's Republic of China
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Liu X, Zawidzka EM, Li H, Lesch CA, Dunbar J, Bousley D, Zou W, Hu X, Carter LL. RORγ Agonists Enhance the Sustained Antitumor Activity through Intrinsic Tc17 Cytotoxicity and Tc1 Recruitment. Cancer Immunol Res 2019; 7:1054-1063. [PMID: 31064778 DOI: 10.1158/2326-6066.cir-18-0714] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 02/06/2019] [Accepted: 05/02/2019] [Indexed: 11/16/2022]
Abstract
Activation of RORγ with synthetic small-molecule agonists has been shown to enhance type 17 effector (CD4+ Th17 and CD8+ Tc17 cells) cell functions and decrease immunosuppressive mechanisms, leading to improved antitumor efficacy in adoptive cell transfer and syngeneic murine tumor models. However, whether Tc17 cells possess intrinsic cytotoxicity and the mechanism they use to lyse target cells is controversial. We report here that Tc17 cells were lytic effectors dependent on perforin and granzyme A. In contrast to Tc1 cells, Tc17 cells resisted activation-induced cell death and maintained granzyme A levels, which conferred the ability to lyse target cells in serial encounters. Thus, although the acute lytic capacity of Tc17 cells could be inferior to Tc1 cells, comparable lysis was achieved over time. In addition to direct lytic activity, Tc17 cells infiltrated early into the tumor mass, recruited other CD8+ T cells to the tumor, and enhanced the survival and lytic capability of these cells during repeated target encounters. Synthetic RORγ agonists further augmented Tc17 survival and lytic activity in vitro and in vivo, controlling tumor growth not only through direct cytotoxicity, but also through recruitment and improved function of other effector cells in the tumor microenvironment, which suggests complementary and cooperate activities for effective immunotherapy.
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Affiliation(s)
| | | | | | | | | | | | - Weiping Zou
- University of Michigan Medical School, Ann Arbor, Michigan
| | - Xiao Hu
- Lycera Corp. Ann Arbor, Michigan
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11
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Banerjee A, Bhattacharya P, Dagur PK, Karmakar S, Ismail N, Joshi AB, Akue AD, KuKuruga M, McCoy JP, Dey R, Nakhasi HL. Live Attenuated Leishmania donovani Centrin Gene-Deleted Parasites Induce IL-23-Dependent IL-17-Protective Immune Response against Visceral Leishmaniasis in a Murine Model. THE JOURNAL OF IMMUNOLOGY 2017; 200:163-176. [PMID: 29187586 DOI: 10.4049/jimmunol.1700674] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 10/26/2017] [Indexed: 12/18/2022]
Abstract
No vaccine exists against visceral leishmaniasis. To develop effective vaccines, we have previously reported protective role of live attenuated centrin gene-deleted Leishmania donovani (LdCen-/- ) parasites through induction of Th1 type immune response in mice, hamsters, and dogs. In this study, we specifically explored the role of Th17 cells in LdCen-/- -induced host protection in mice. Our results showed that compared with wild-type L. donovani infection, LdCen-/- parasites induce significantly higher expression of Th17 differentiation cytokines in splenic dendritic cells. There was also induction of IL-17 and its promoting cytokines in total splenocytes and in both CD4 and CD8 T cells following immunization with LdCen-/- Upon challenge with wild-type parasites, IL-17 and its differentiating cytokines were significantly higher in LdCen-/- -immunized mice compared with nonimmunized mice that resulted in parasite control. Alongside IL-17 induction, we observed induction of IFN-γ-producing Th1 cells as reported earlier. However, Th17 cells are generated before Th1 cells. Neutralization of either IL-17 or IFN-γ abrogated LdCen-/- -induced host protection further confirming the essential role of Th17 along with Th1 cytokines in host protection. Treatment with recombinant IL-23, which is required for stabilization and maintenance of IL-17, heightened Th17, and Tc17 responses in immunized mice splenocytes. In contrast, Th17 response was absent in immunized IL-23R-/- mice that failed to induce protection upon virulent Leishmania challenge suggesting that IL-23 plays an essential role in IL-17-mediated protection by LdCen-/- parasites. This study unveiled the role of IL-23-dependent IL-17 induction in LdCen-/- parasite-induced immunity and subsequent protection against visceral leishmaniasis.
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Affiliation(s)
- Antara Banerjee
- Division of Emerging and Transfusion Transmitted Diseases, Office of Blood Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993.,Department of Zoology, Bangabasi College, Kolkata, 700016 West Bengal, India
| | - Parna Bhattacharya
- Division of Emerging and Transfusion Transmitted Diseases, Office of Blood Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993
| | - Pradeep K Dagur
- Flow Cytometry Core, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892; and
| | - Subir Karmakar
- Division of Emerging and Transfusion Transmitted Diseases, Office of Blood Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993
| | - Nevien Ismail
- Division of Emerging and Transfusion Transmitted Diseases, Office of Blood Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993
| | - Amritanshu B Joshi
- Division of Emerging and Transfusion Transmitted Diseases, Office of Blood Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993
| | - Adovi D Akue
- Office of Vaccines Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993
| | - Mark KuKuruga
- Office of Vaccines Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993
| | - John Philip McCoy
- Flow Cytometry Core, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892; and
| | - Ranadhir Dey
- Division of Emerging and Transfusion Transmitted Diseases, Office of Blood Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993;
| | - Hira L Nakhasi
- Division of Emerging and Transfusion Transmitted Diseases, Office of Blood Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993;
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12
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Nanjappa SG, McDermott AJ, Fites JS, Galles K, Wüthrich M, Deepe GS, Klein BS. Antifungal Tc17 cells are durable and stable, persisting as long-lasting vaccine memory without plasticity towards IFNγ cells. PLoS Pathog 2017; 13:e1006356. [PMID: 28542595 PMCID: PMC5456400 DOI: 10.1371/journal.ppat.1006356] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 06/02/2017] [Accepted: 04/14/2017] [Indexed: 01/01/2023] Open
Abstract
Our understanding of persistence and plasticity of IL-17A+ memory T cells is clouded by conflicting results in models analyzing T helper 17 cells. We studied memory IL-17A+ CD8+ T-cell (Tc17) homeostasis, persistence and plasticity during fungal vaccine immunity. We report that vaccine-induced memory Tc17 cells persist with high fidelity to the type 17 phenotype. Tc17 cells persisted durably for a year as functional IL-17A+ memory cells without converting to IFNγ+ (Tc1) cells, although they produced multiple type I cytokines in the absence of residual vaccine antigen. Memory Tc17 cells were canonical CD8+ T cells with phenotypic features distinct from Tc1 cells, and were Ror(γ)thi, TCF-1hi, T-betlo and EOMESlo. In investigating the bases of Tc17 persistence, we observed that memory Tc17 cells had much higher levels of basal homeostatic proliferation than did Tc1 cells. Conversely, memory Tc17 cells displayed lower levels of anti-apoptotic molecules Bcl-2 and Bcl-xL than Tc1 cells, yet were resistant to apoptosis. Tc1 cells required Bcl-2 for their survival, but Bcl-2 was dispensable for the maintenance of Tc17 cells. Tc17 and Tc1 cells displayed different requirements for HIF-1α during effector differentiation and sustenance and memory persistence. Thus, antifungal vaccination induces durable and stable memory Tc17 cells with distinct requirements for long-term persistence that distinguish them from memory Tc1 cells. CD4+ T-cell deficient patients such as those with AIDS and idiopathic CD4+ T-cell lymphopenia are vulnerable to systemic fungal infections. We previously showed that CD8+ T cells can be exploited in CD4+ T cell deficient hosts for vaccine immunity against lethal fungal pneumonia in mice and that IL-17A production by these cells (Tc17) is essential. Existing dogma holds that IL-17A producing CD4+ T cells (Th17) are highly plastic, unstable, and convert into IFNγ producing cells, losing the capacity to produce IL-17A, which is the signature feature of Tc17 cells. Here, we show that vaccine-elicited antifungal Tc17 cells are maintained as stable and long-lasting memory cells that resist conversion into IFNγ cells (Tc1) and protect CD4+ T cell deficient hosts against lethal pulmonary fungal infection. Antifungal Tc17 cells displayed features that define classical memory cells. However, memory Tc17 exhibited different requirements than Tc1 cells in the factors that promote T cell survival, including anti-apoptotic molecules Bcl-2 and Bcl-xl, and HIF-1α, which aids survival of cells in lower oxygen conditions found during inflammation. Thus, our study reveals that fungal vaccination elicits a durable, stable population of Tc17 cells with distinct features of survival needed for preventing infection in immunocompromised hosts.
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Affiliation(s)
- Som Gowda Nanjappa
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States of America
- * E-mail: (SGN); (BSK)
| | - Andrew J. McDermott
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States of America
| | - J. Scott Fites
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States of America
| | - Kevin Galles
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States of America
| | - Marcel Wüthrich
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States of America
| | - George S. Deepe
- Department of Internal Medicine, Division of Infectious Diseases, University of Cincinnati, College of Medicine, Cincinnati, OH, United States of America
| | - Bruce S. Klein
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States of America
- Department of Internal Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States of America
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States of America
- * E-mail: (SGN); (BSK)
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13
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Xu WH, Hu XL, Liu XF, Bai P, Sun YC. Peripheral Tc17 and Tc17/Interferon-γ Cells are Increased and Associated with Lung Function in Patients with Chronic Obstructive Pulmonary Disease. Chin Med J (Engl) 2017; 129:909-16. [PMID: 27064034 PMCID: PMC4831524 DOI: 10.4103/0366-6999.179798] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Background: Chronic obstructive pulmonary disease (COPD) is characterized by progressive loss of lung function and local and systemic inflammation, in which CD8+ T-cells are believed to play a key role. Activated CD8+ T-cells differentiate into distinct subpopulations, including interferon-γ (IFN-γ)-producing Tc1 and interleukin (IL)-17-producing Tc17 cells. Recent evidence indicates that Tc17 cells exhibit considerable plasticity and may convert into IL-17/IFN-γ-double producing (Tc17/IFN-γ) cells when driven by inflammatory conditions. The aim of this study was to investigate the Tc17/IFN-γ subpopulation in peripheral blood of patients with COPD and to evaluate their potential roles in this disease. Methods: Peripheral blood samples were collected from 15 never-smokers, 23 smokers with normal lung function, and 25 patients with COPD (Global Initiative for Chronic Obstructive Lung Disease 2–4). Proportions of the IL-17/IFN-γ-double expressing subpopulation were assessed using flow cytometry. Plasma concentrations of cytokines favoring Tc17/IFN-γ differentiation were measured by enzyme-linked immunosorbent assay. Results: Patients with COPD had higher proportions of Tc17 cells and Tc17/IFN-γ cells in the peripheral blood than smokers and never-smokers. The plasticity of Tc17 cells was higher than that of Th17 cells. The percentages of Tc17 cells and Tc17/IFN-γ cells showed negative correlations with forced expiratory volume in 1 s % predicted value (r = −0.418, P = 0.03; r = −0.596, P = 0.002, respectively). The plasma concentrations of IL-6, transforming growth factor-β1, and IL-12 were significantly higher in patients with COPD compared with smokers and never-smokers. Conclusions: Peripheral Tc17 cells are increased and more likely to convert to Tc17/IFN-γ cells in COPD, suggesting that Tc17 cell plasticity may be involved in persistent inflammation of the disease.
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Affiliation(s)
| | | | | | | | - Yong-Chang Sun
- Department of Respiratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing 100730; Department of Respiratory and Critical Care Medicine, Peking University Third Hospital, Beijing 100191, China
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14
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Goswami R, Kaplan M. STAT Transcription Factors in T Cell Control of Health and Disease. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2017; 331:123-180. [DOI: 10.1016/bs.ircmb.2016.09.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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15
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Chronic graft-versus-host disease: biological insights from preclinical and clinical studies. Blood 2016; 129:13-21. [PMID: 27821504 DOI: 10.1182/blood-2016-06-686618] [Citation(s) in RCA: 188] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 07/06/2016] [Indexed: 12/15/2022] Open
Abstract
With the increasing use of mismatched, unrelated, and granulocyte colony-stimulating factor-mobilized peripheral blood stem cell donor grafts and successful treatment of older recipients, chronic graft-versus-host disease (cGVHD) has emerged as the major cause of nonrelapse mortality and morbidity. cGVHD is characterized by lichenoid changes and fibrosis that affects a multitude of tissues, compromising organ function. Beyond steroids, effective treatment options are limited. Thus, new strategies to both prevent and treat disease are urgently required. Over the last 5 years, our understanding of cGVHD pathogenesis and basic biology, born out of a combination of mouse models and correlative clinical studies, has radically improved. We now understand that cGVHD is initiated by naive T cells, differentiating predominantly within highly inflammatory T-helper 17/T-cytotoxic 17 and T-follicular helper paradigms with consequent thymic damage and impaired donor antigen presentation in the periphery. This leads to aberrant T- and B-cell activation and differentiation, which cooperate to generate antibody-secreting cells that cause the deposition of antibodies to polymorphic recipient antigens (ie, alloantibody) or nonpolymorphic antigens common to both recipient and donor (ie, autoantibody). It is now clear that alloantibody can, in concert with colony-stimulating factor 1 (CSF-1)-dependent donor macrophages, induce a transforming growth factor β-high environment locally within target tissue that results in scleroderma and bronchiolitis obliterans, diagnostic features of cGVHD. These findings have yielded a raft of potential new therapeutics, centered on naive T-cell depletion, interleukin-17/21 inhibition, kinase inhibition, regulatory T-cell restoration, and CSF-1 inhibition. This new understanding of cGVHD finally gives hope that effective therapies are imminent for this devastating transplant complication.
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16
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Kennedy RB, Poland GA, Ovsyannikova IG, Oberg AL, Asmann YW, Grill DE, Vierkant RA, Jacobson RM. Impaired innate, humoral, and cellular immunity despite a take in smallpox vaccine recipients. Vaccine 2016; 34:3283-90. [PMID: 27177944 PMCID: PMC5528000 DOI: 10.1016/j.vaccine.2016.05.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 04/26/2016] [Accepted: 05/02/2016] [Indexed: 11/29/2022]
Abstract
Smallpox vaccine is highly effective, inducing protective immunity to smallpox and diseases caused by related orthopoxviruses. Smallpox vaccine efficacy was historically defined by the appearance of a lesion or "take" at the vaccine site, which leaves behind a characteristic scar. Both the take and scar are readily recognizable and were used during the eradication effort to indicate successful vaccination and to categorize individuals as "protected." However, the development of a typical vaccine take may not equate to the successful development of a robust, protective immune response. In this report, we examined two large (>1000) cohorts of recipients of either Dryvax(®) or ACAM2000 using a testing and replication study design and identified subgroups of individuals who had documented vaccine takes, but who failed to develop robust neutralizing antibody titers. Examination of these individuals revealed that they had suboptimal cellular immune responses as well. Further testing indicated these low responders had a diminished innate antiviral gene expression pattern (IFNA1, CXCL10, CXCL11, OASL) upon in vitro stimulation with vaccinia virus, perhaps indicative of a dysregulated innate response. Our results suggest that poor activation of innate antiviral pathways may result in suboptimal immune responses to the smallpox vaccine. These genes and pathways may serve as suitable targets for adjuvants in new attenuated smallpox vaccines and/or effective antiviral therapy targets against poxvirus infections.
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Affiliation(s)
- Richard B Kennedy
- Mayo Vaccine Research Group, Mayo Clinic, Rochester, MN, USA; Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA
| | - Gregory A Poland
- Mayo Vaccine Research Group, Mayo Clinic, Rochester, MN, USA; Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA.
| | - Inna G Ovsyannikova
- Mayo Vaccine Research Group, Mayo Clinic, Rochester, MN, USA; Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA
| | - Ann L Oberg
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Yan W Asmann
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Diane E Grill
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Robert A Vierkant
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Robert M Jacobson
- Mayo Vaccine Research Group, Mayo Clinic, Rochester, MN, USA; Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA; Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA
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17
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IL-17+ CD8+ T cells: Differentiation, phenotype and role in inflammatory disease. Immunol Lett 2016; 178:20-6. [PMID: 27173097 PMCID: PMC5046976 DOI: 10.1016/j.imlet.2016.05.001] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 05/06/2016] [Indexed: 01/01/2023]
Abstract
IL-17A (IL-17) is produced by multiple cell subsets, including CD8+ T cells. The presence of IL-17+ CD8+ T cells in human inflammatory diseases suggests these cells may contribute to immunopathology. Increased knowledge of human IL-17+ CD8+ T cells will enhance our overall understanding of their role in human disease.
The pro-inflammatory cytokine interleukin-17A (IL-17) has been the subject of research by many groups worldwide. IL-17 expression is often associated with a specific subset of CD4+ T cells (the so-called Th17 cells); however various other immune cell subsets can also synthesise and express IL-17, including CD8+ T cells. Here we review recent data regarding the presence of IL-17+ CD8+ T cells (also known as Tc17 cells) in human inflammatory disease, discuss current knowledge regarding the culture conditions required for the differentiation of these cells in humans and mice, and describe key phenotypic and functional features. Collectively, this information may shed light on the potential pathogenic role that IL-17+ CD8+ T cells may play in human inflammatory disease.
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18
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Chen HW, Tsai JP, Yao TY, Hsieh CL, Chen IH, Liu SJ. TGF-β and IL-21 cooperatively stimulate activated CD8(+) T cells to differentiate into Tc17 cells. Immunol Lett 2016; 174:23-7. [PMID: 27085379 DOI: 10.1016/j.imlet.2016.04.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 03/22/2016] [Accepted: 04/12/2016] [Indexed: 12/31/2022]
Abstract
TGF-β together with IL-21 or IL-6 can drive the differentiation of naïve CD8(+) T cells into IL-17-producing CD8(+) T cells. These IL-17-producing CD8(+) T cells are termed Tc17 cells. Tc17 cells preserve plasticity under various conditions in vitro and in vivo. IFN-γ-producing CD8(+) T cells are termed Tc1 cells. However, Tc1 cells are considered relatively stable. In the present study, we show that the combination of TGF-β plus IL-21, but not IL-6, converts Tc1 cells into Tc17 cells; this conversion is associated with elevated RORα, RORγt, and Batf mRNA levels. These results indicate that Tc1 cells are skewed to the Tc17 cell phenotype under TGF-β plus IL-21-polarizing conditions. Furthermore, IL-6R is expressed on naïve, but not activated, CD8(+) T cells. In contrast, IL-21R is expressed on both naïve and activated CD8(+) T cells. Thus, differential expression profiles of IL-6R and IL-21R on naïve and activated CD8(+) T cells may be one mechanism by which TGF-β plus IL-21, but not IL-6, can drive activated CD8(+) T cells to differentiate into IL-17-producing cells. Taken together, these results provide a novel viewpoint for the plasticity of Tc1 cells.
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Affiliation(s)
- Hsin-Wei Chen
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli 350, Taiwan, ROC; Graduate Institute of Immunology, China Medical University, Taichung, Taiwan, ROC.
| | - Jy-Ping Tsai
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli 350, Taiwan, ROC
| | - Tsung-You Yao
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli 350, Taiwan, ROC
| | - Chia-Ling Hsieh
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli 350, Taiwan, ROC
| | - I-Hua Chen
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli 350, Taiwan, ROC
| | - Shin-Jen Liu
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli 350, Taiwan, ROC; Graduate Institute of Immunology, China Medical University, Taichung, Taiwan, ROC.
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19
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Tc17 cells are a proinflammatory, plastic lineage of pathogenic CD8+ T cells that induce GVHD without antileukemic effects. Blood 2015. [DOI: 10.1182/blood-2015-01-622662] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Key Points
Donor-derived Tc17 cells differentiate early after allogeneic transplant in response to IL-6 and alloantigen presentation by host DCs. Tc17 are highly proinflammatory and pathogenic posttransplant, but exert limited or no GVL activity.
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20
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Intrinsic MyD88-Akt1-mTOR Signaling Coordinates Disparate Tc17 and Tc1 Responses during Vaccine Immunity against Fungal Pneumonia. PLoS Pathog 2015; 11:e1005161. [PMID: 26367276 PMCID: PMC4569330 DOI: 10.1371/journal.ppat.1005161] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Accepted: 08/21/2015] [Indexed: 12/22/2022] Open
Abstract
Fungal infections have skyrocketed in immune-compromised patients lacking CD4+ T cells, underscoring the need for vaccine prevention. An understanding of the elements that promote vaccine immunity in this setting is essential. We previously demonstrated that vaccine-induced IL-17A+ CD8+ T cells (Tc17) are required for resistance against lethal fungal pneumonia in CD4+ T cell-deficient hosts, whereas the individual type I cytokines IFN-γ, TNF-α and GM-CSF, are dispensable. Here, we report that T cell-intrinsic MyD88 signals are crucial for these Tc17 cell responses and vaccine immunity against lethal fungal pneumonia in mice. In contrast, IFN-γ+ CD8+ cell (Tc1) responses are largely normal in the absence of intrinsic MyD88 signaling in CD8+ T cells. The poor accumulation of MyD88-deficient Tc17 cells was not linked to an early onset of contraction, nor to accelerated cell death or diminished expression of anti-apoptotic molecules Bcl-2 or Bcl-xL. Instead, intrinsic MyD88 was required to sustain the proliferation of Tc17 cells through the activation of mTOR via Akt1. Moreover, intrinsic IL-1R and TLR2, but not IL-18R, were required for MyD88 dependent Tc17 responses. Our data identify unappreciated targets for augmenting adaptive immunity against fungi. Our findings have implications for designing fungal vaccines and immune-based therapies in immune-compromised patients. Patients with AIDS, cancer or immune suppressive treatments are vulnerable to infection with invasive fungi. We have found that even when helper CD4 T cells are profoundly reduced in a mouse model that mimics this defect in AIDS, other remaining T cells are capable of mounting vaccine immunity against a deadly fungal infection, and they do so by producing the powerful, soluble product, IL-17. It has been widely believed that the activation and instruction of such cells, called Tc17 cells, is governed by another population of immune cells in the body, but we have found here that pathways within these Tc17 cells themselves mediate their activation and ability to produce the IL-17 needed for resistance to infection. We have also identified elements of the circuitry controlling this pathway—elements called MyD88, Akt1 and mTOR—and found that they control the production of IL-17 and not other products such as IFN-γ often produced by these cells. Further, we determined that this circuitry controls the development of Tc17 cells by regulating their ability to divide and expand. Thus, in a mouse model of vaccination against lethal fungal pneumonia caused by Blastomyces dermatitidis, we uncovered an important cellular arsenal that can be recruited to bolster resistance against a fungal infection, and identified novel ways in which the cells develop and expand into potent killers of fungi.
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21
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Ravichandran J, Jackson RJ, Trivedi S, Ranasinghe C. IL-17A expression in HIV-specific CD8 T cells is regulated by IL-4/IL-13 following HIV-1 prime-boost immunization. J Interferon Cytokine Res 2015; 35:176-85. [PMID: 25493691 PMCID: PMC4350450 DOI: 10.1089/jir.2014.0078] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 08/22/2014] [Indexed: 01/25/2023] Open
Abstract
Although Th1 and Th2 cytokines can inhibit interleukin (IL)-17-secreting T cells, how these cells are regulated under different infectious conditions is still debated. Our previous studies have shown that vaccination of IL-4 and IL-13 gene knockout (KO) mice can induce high-avidity HIV K(d)Gag197-205-specific CD8 T cells with better protective efficacy. In this study, when IL-13, IL-4, STAT6 KO, and wild-type BALB/c mice were prime-boost immunized with an HIV poxviral modality, elevated numbers of IL-17A(+) splenic K(d)Gag197-205-specific CD8 T cells were observed in all the KO mice compared with the wt BALB/c control. Similarly, when wt BALB/c mice were immunized with IL-13Rα2-adjuvanted HIV vaccines (that transiently inhibited IL-13 activity and induced high-avidity CD8 T cells with enhanced protective efficacy), elevated IL-17A(+) K(d)Gag197-205-specific CD8 T cells were detected both in the lung and the spleen. However, at the transcriptional level, elevated TGF-β, IL-6, ROR-γt, and IL-17A mRNA copy numbers were mainly detected in IL-4 KO, but not the IL-13 KO mice. These data suggested that TGF-β, IL-6, ROR-γt, but not IL-23a, played a role in IL-17A regulation in K(d)Gag197-205-specific CD8 T cells. Collectively, our findings suggest that IL-4 and IL-13 differentially regulate the expression of IL-17A in K(d)Gag197-205-specific CD8 T cells at the transcriptional and translational level, respectively, implicating IL-17A as an indirect modulator of CD8 T cell avidity and protective immunity.
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Affiliation(s)
- Jayashree Ravichandran
- Molecular Mucosal Vaccine Immunology Group, Department of Immunology, The John Curtin School of Medical Research, The Australian National University , Canberra, Australia
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22
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El-Behi M, Dai H, Magalhaes JG, Hwang D, Zhang GX, Rostami A, Ciric B. Committed Tc17 cells are phenotypically and functionally resistant to the effects of IL-27. Eur J Immunol 2014; 44:3003-14. [PMID: 25070084 DOI: 10.1002/eji.201344360] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 06/02/2014] [Accepted: 07/23/2014] [Indexed: 11/09/2022]
Abstract
IL-17-secreting CD8(+) T cells (Tc17 cells) have been implicated in immunity to infections, cancer, and autoimmune diseases. Thus far, studies on Tc17 cells have primarily investigated their development from naïve precursors, while the biology of committed Tc17 cells has been less characterized, in particular during the effector phase of immune responses. IL-27 is an important regulator of inflammation through the induction of regulatory Tr1 cells, as well as a suppressor of Th17-cell development. IL-27 suppresses the development of Tc17 cells, but its effects on committed Tc17 cells are unknown. Here we demonstrate that even though IL-27 completely inhibited the development of C57BL/6 mouse Tc17 cells, it had little effect on previously committed Tc17 cells. Although committed Tc17 cells were capable of responding to IL-27, it had no effect on expression of RORγt and RORα, or production of various cytokines. Committed Tc17 cells did not express granzyme B and lacked cytotoxicity in vitro, features that remained unaltered by IL-27 treatment. Nonetheless, they efficiently induced diabetes, irrespective of treatment with IL-27 prior to transfer into RIP-mOVA mice. These findings suggest that use of IL-27 to modulate autoimmune diseases might have limited therapeutic efficacy if autoaggressive Tc17 cells have already developed.
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Affiliation(s)
- Mohamed El-Behi
- Department of Neurology, Thomas Jefferson University, Philadelphia, PA, USA
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23
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Huang YH, Tsai K, Ma C, Vallance BA, Priatel JJ, Tan R. SLAM-SAP signaling promotes differentiation of IL-17-producing T cells and progression of experimental autoimmune encephalomyelitis. THE JOURNAL OF IMMUNOLOGY 2014; 193:5841-53. [PMID: 25362182 DOI: 10.4049/jimmunol.1301435] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
IL-17 plays critical roles in host defenses, combating bacterial and fungal infections, as well as the pathogenesis of autoimmune diseases such as experimental autoimmune encephalomyelitis (EAE). The signaling adaptor SAP is essential for normal immune homeostasis and mutations within SH2D1A, the locus encoding this protein, result in serious and sometimes fatal syndromes, including X-linked lymphoproliferative disease and severe cases of common variable immunodeficiency. However, the precise cellular basis of how SAP deficiency contributes to immune dysfunction remains incompletely understood. In this study, we found that CD4 and CD8 T cells lacking SAP had a diminished capacity to differentiate into IL-17-producing Th17 and T cytotoxic (Tc17) cells relative to wild-type lymphocytes. The use of costimulating SLAM Abs was found to augment the differentiation of IL-17-secreting effectors in wild-type but not Sh2d1a(-/-) splenic T cells under IL-17-polarizing conditions. In addition, SAP's regulation of IL-17-secreting T cells was shown to be a T cell-intrinsic role, as purified naive Sh2d1a(-/-) CD4 and CD8 T cells were inherently defective at converting into Th17 and Tc17 cells in vitro and in vivo. Furthermore, Sh2d1a(-/-) mice were protected from EAE and exhibited greatly decreased numbers of CNS-infiltrating Th17 and Tc17 effector T cells and reduced disease severity. Collectively, these results suggest that SLAM-SAP signaling drives the differentiation and function of Th17 and Tc17 cells in vitro and in vivo and contributes to the pathogenesis of autoimmunity in EAE.
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Affiliation(s)
- Yu-Hsuan Huang
- Child and Family Research Institute, BC Children's Hospital, Vancouver, British Columbia V5Z 4H4, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada
| | - Kevin Tsai
- Child and Family Research Institute, BC Children's Hospital, Vancouver, British Columbia V5Z 4H4, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada
| | - Caixia Ma
- Child and Family Research Institute, BC Children's Hospital, Vancouver, British Columbia V5Z 4H4, Canada; Division of Gastroenterology, Department of Pediatrics, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada; and
| | - Bruce A Vallance
- Child and Family Research Institute, BC Children's Hospital, Vancouver, British Columbia V5Z 4H4, Canada; Division of Gastroenterology, Department of Pediatrics, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada; and
| | - John J Priatel
- Child and Family Research Institute, BC Children's Hospital, Vancouver, British Columbia V5Z 4H4, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada;
| | - Rusung Tan
- Child and Family Research Institute, BC Children's Hospital, Vancouver, British Columbia V5Z 4H4, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada; Department of Pathology, Sidra Medical and Research Center, Doha, Qatar
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Abstract
Tc17 cells-a subset of CD8(+)T cells-have recently been identified that are characterized by the production of interleukin (IL)-17. Cytokines IL-6 and transforming growth factor-beta 1 (TGF-β1) and transcription factors signaling transducers and activators of transcription (STAT)3, retinoic acid receptor-related orphan nuclear receptor gamma (RORγt), and interferon regulatory factor (IRF)4 are necessary for differentiation of Tc17 cells, controlling expression of molecules essential for Tc17 cell trafficking and function. Current human researches have determined the significance of CD161 expression as either a marker of Tc17 cells or as an effector and regulator of Tc17 cell function. Noncytotoxic Tc17 cells possess a high plasticity to convert into IFN-γ producing cells, which exhibit strong cytotoxic activity. The importance of in vivo plasticity of Tc17 cells for the induction of autoimmune diseases has been demonstrated and Tc17 cells potentially represent novel therapeutic targets in autoimmune diseases. The involvement of interleukin (IL)-17-producing CD8(+)T cells (Tc17) in various conditions, such as infection, cancer, and autoimmune inflammation, has been documented in both humans and mice; however, Tc17 cells have received only marginal attention. Here, we provide an overview of the cytokines and chemokines that characterize the murine and human Tc17 cells. Moreover, we discuss signaling pathways, molecular interactions, and transcriptional events that contribute to Tc17 differentiation and acquisition of effector functions. Also considered is the basis of Tc17 cell plasticity toward the Tc1 lineage, and we suggest that in vivo plasticity of Tc17 cells may be a key feature of Tc17 cell biology in autoimmune diseases. Furthermore, current human researches have revealed that Tc17 cells are different than that in mice because all of them express CD161 and exclusively originate from CD161 precursors present in umbilical cord blood. Finally, we focus on the recent evidence for long-lived Tc17 memory cell populations in mouse models and humans, and their functional roles in mediating disease memory. Hopefully, the information obtained will benefit for developing novel therapeutic strategies.
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Affiliation(s)
- Yan Liang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University , Hefei, Anhui , China
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Hayes MD, Ovcinnikovs V, Smith AG, Kimber I, Dearman RJ. The aryl hydrocarbon receptor: differential contribution to T helper 17 and T cytotoxic 17 cell development. PLoS One 2014; 9:e106955. [PMID: 25203682 PMCID: PMC4159274 DOI: 10.1371/journal.pone.0106955] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 08/11/2014] [Indexed: 12/30/2022] Open
Abstract
The aryl hydrocarbon receptor (AhR) has been shown to be required for optimal Thelper (Th) 17 cell activation. Th17 cells provide immunity against extracellular pathogens and are implicated in autoimmune diseases. Herein, the role of the AhR in cytokine production by Th17, and by the analogous population of T cytotoxic (Tc)17 cells, has been examined. Lymph node Tc (CD8(+)) and Th (CD4(+)) cells were isolated by negative selection from naive AhR(+/-) and AhR(-/-) mice and polarised to Tc1/Th1 or Tc17/Th17 phenotypes with appropriate cytokines. Cell differentiation was assessed as a function of mRNA and protein (ELISA and flow cytometry) expression for interferon (IFN)-γ and for key Th17 cytokines. In AhR(+/-) mice, Th17 cells displayed an exclusive IL-17 profile, which was markedly inhibited by a selective AhR antagonist to levels observed in AhR knockout mice. Addition of the natural AhR agonist 6-formylindolo[3,2-b]carbazole (FICZ) markedly enhanced Th17 cell activity in the heterozygotes. In contrast, Tc17 cells polarised into 3 distinct subsets: producing either IL-17 or IFN-γ alone, or both cytokines. Blocking AhR was also detrimental to Tc17 development, with reduced responses recorded in AhR(-/-) mice and antagonist-mediated reduction of IL-17 expression in the heterozygotes. However, Tc17 cells were largely refractory to exogenous FICZ, presumably because Tc17 cells express baseline AhR mRNA, but unlike Th17 cells, there is no marked up-regulation during polarisation. Thus, Th17 cell development is more dependent upon AhR activation than is Tc17 cell development, suggesting that endogenous AhR ligands play a much greater role in driving Th17 cell responses.
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Affiliation(s)
- Mark D. Hayes
- Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - Vitalijs Ovcinnikovs
- Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - Andrew G. Smith
- MRC Toxicology Unit, The University of Leicester, Leicester, United Kingdom
| | - Ian Kimber
- Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - Rebecca J. Dearman
- Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
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Heterogeneity in the Differentiation and Function of CD8+ T Cells. Arch Immunol Ther Exp (Warsz) 2014; 62:449-58. [DOI: 10.1007/s00005-014-0293-y] [Citation(s) in RCA: 124] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 04/24/2014] [Indexed: 01/01/2023]
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Pick J, Arra A, Lingel H, Hegel JK, Huber M, Nishanth G, Jorch G, Fischer KD, Schlüter D, Tedford K, Brunner-Weinzierl MC. CTLA-4 (CD152) enhances the Tc17 differentiation program. Eur J Immunol 2014; 44:2139-52. [PMID: 24723371 DOI: 10.1002/eji.201343497] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 02/21/2014] [Accepted: 03/28/2014] [Indexed: 01/24/2023]
Abstract
Although CD8(+) T cells that produce IL-17 (Tc17 cells) have been linked to host defense, Tc17 cells show reduced cytotoxic activity, which is the characteristic function of CD8(+) T cells. Here, we show that CTLA-4 enhances the frequency of IL-17 in CD8(+) T cells, indicating that CTLA-4 (CD152) specifically promotes Tc17 differentiation. Simultaneous stimulation of CTLA-4(+/+) and CTLA-4(-/-) T cells in cocultures and agonistic CTLA-4 stimulation unambiguously revealed a cell-intrinsic mechanism for IL-17 control by CTLA-4. The quality of CTLA-4-induced Tc17 cells was tested in vivo, utilizing infection with the facultative intracellular bacterium Listeria monocytogenes (LM). Unlike CTLA-4(+/+) Tc17 cells, CTLA-4(-/-) were nearly as efficient as Tc1 CTLA-4(+/+) cells in LM clearance. Additionally, adoptively transferred CTLA-4(-/-) Tc17 cells expressed granzyme B after rechallenge, and produced Tc1 cytokines such as IFN-γ and TNF-α, which strongly correlate with bacterial clearance. CTLA-4(+/+) Tc17 cells demonstrated a high-quality Tc17 differentiation program ex vivo, which was also evident in isolated IL-17-secreting Tc17 cells, with CTLA-4-mediated enhanced upregulation of Tc17-related molecules such as IL-17A, RORγt, and IRF-4. Our results show that CTLA-4 promotes Tc17 differentiation that results in robust Tc17 responses. Its inactivation might therefore represent a central therapeutic target to enhance clearance of infection.
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Affiliation(s)
- Jonas Pick
- Department of Pediatrics, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
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Buskirk AD, Templeton SP, Nayak AP, Hettick JM, Law BF, Green BJ, Beezhold DH. Pulmonary immune responses to Aspergillus fumigatus in an immunocompetent mouse model of repeated exposures. J Immunotoxicol 2014; 11:180-9. [PMID: 23919459 PMCID: PMC4604601 DOI: 10.3109/1547691x.2013.819054] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Aspergillus fumigatus is a filamentous fungus that produces abundant pigmented conidia. Several fungal components have been identified as virulence factors, including melanin; however, the impact of these factors in a repeated exposure model resembling natural environmental exposures remains unknown. This study examined the role of fungal melanin in the stimulation of pulmonary immune responses using immunocompetent BALB/c mice in a multiple exposure model. It compared conidia from wild-type A. fumigatus to two melanin mutants of the same strain, Δarp2 (tan) or Δalb1 (white). Mass spectrometry-based analysis of conidial extracts demonstrated that there was little difference in the protein fingerprint profiles between the three strains. Field emission scanning electron microscopy demonstrated that the immunologically inert Rodlet A layer remained intact in melanin-deficient conidia. Thus, the primary difference between the strains was the extent of melanization. Histopathology indicated that each A. fumigatus strain induced lung inflammation, regardless of the extent of melanization. In mice exposed to Δalb1 conidia, an increase in airway eosinophils and a decrease in neutrophils and CD8(+) IL-17(+) (Tc17) cells were observed. Additionally, it was shown that melanin mutant conidia were more rapidly cleared from the lungs than wild-type conidia. These data suggest that the presence of fungal melanin may modulate the pulmonary immune response in a mouse model of repeated exposures to A. fumigatus conidia.
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Affiliation(s)
- Amanda D. Buskirk
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
- Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV, USA
| | - Steven P. Templeton
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
- Department of Microbiology and Immunology, Indiana University School of Medicine, Terre Haute, IN, USA
| | - Ajay P. Nayak
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
| | - Justin M. Hettick
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
| | - Brandon F. Law
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
| | - Brett J. Green
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
| | - Donald H. Beezhold
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
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29
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Xie X, Geng S, Liu H, Li C, Yang Y, Wang B. Cimetidine synergizes with Praziquantel to enhance the immune response of HBV DNA vaccine via activating cytotoxic CD8(+) T cell. Hum Vaccin Immunother 2014; 10:1688-99. [PMID: 24643207 DOI: 10.4161/hv.28517] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Previously, we have reported that either CIM or PZQ, 2 clinical drugs, could be used to develop as adjuvants on HBV DNA vaccine to elicit both humoral and cellular immune responses. Here, we demonstrate that combinations of CIM and PZQ as adjuvants for a HBV DNA vaccine, could induce much stronger antigen specific CD4(+) and CD8(+) T cell responses compared either with CIM or PZQ alone. The synergistic effects of CIM plus PZQ to HBV DNA vaccine were observed on a higher IgG2a/IgG1 ratio, an increase of HBsAg-specific CD4(+) T cells capable of producing IFN-γ or IL-17A and a robust IFN-γ-, IL-17A-, or TNF-α-producing CD8(+) T cells to HBsAg. Most importantly, the antigen-specific CTL response was also elevated significantly, which is critical for the eradication of hepatitis B virus (HBV) infected cells. Using an HBsAg transgenic mouse model, the expression of HBsAg in the hepatic cells was also significantly reduced after immunized with pCD-S 2 in the presence of 0.5% CIM and 0.25% PZQ. Further investigations demonstrated that the synergistic effects of combination of CIM and PZQ were dependent on enhanced cytotoxic CD8(+) T cells, which was correlated with impaired activities of regulatory T cells. Therefore, combinations of CIM and PZQ have great potential to be used as effective adjuvants on DNA-based vaccinations for the treatment of chronic hepatitis B.
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Affiliation(s)
- Xiaoping Xie
- State Key Laboratory for Agro-Biotechnology; College of Biological Science; China Agricultural University; Beijing, PR China
| | - Shuang Geng
- Key Laboratory of Medical Molecular Virology of MOH and MOE; Fudan University Shanghai Medical College; Shanghai, PR China
| | - Hu Liu
- State Key Laboratory for Agro-Biotechnology; College of Biological Science; China Agricultural University; Beijing, PR China
| | - Chaofan Li
- Key Laboratory of Medical Molecular Virology of MOH and MOE; Fudan University Shanghai Medical College; Shanghai, PR China
| | - Yuqin Yang
- Shanghai Public Health Clinical Center affiliated to Fudan University; Shanghai, PR China
| | - Bin Wang
- State Key Laboratory for Agro-Biotechnology; College of Biological Science; China Agricultural University; Beijing, PR China; Key Laboratory of Medical Molecular Virology of MOH and MOE; Fudan University Shanghai Medical College; Shanghai, PR China
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30
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Changes of Th17/Tc17 and Th17/Treg cells in endometrial carcinoma. Gynecol Oncol 2014; 132:599-605. [PMID: 24388919 DOI: 10.1016/j.ygyno.2013.12.036] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 12/04/2013] [Accepted: 12/26/2013] [Indexed: 12/30/2022]
Abstract
OBJECTIVES T helper 17 (Th17), T cytotoxic 17 (Tc17) and regulatory T (Treg) cells are important factors in the pathogenesis of inflammatory and autoimmune diseases. However, information concerning the roles of these cells in antitumor immunity or endometrial tumorigenesis remains limited. In this study, we aimed to describe the distribution of Th17, Tc17 and Treg cells in endometrial carcinoma patients, and elucidate the probable role of these effector T cells. METHODS We assessed the expression of interleukin (IL)-17 and Foxp3 in the peripheral blood of endometrial carcinoma patients and healthy controls by flow cytometry to determine the relative numbers of Th17, Tc17 and Treg cells. Th17 cells and Tc17 cells were counted as percentages of the total number of CD3(+) T cells; Treg cells were counted as a percentage of the total number of CD4(+) T cells. We also evaluated Th17 and Tc17 cells in tumor tissue by immunohistochemical staining. IL-17 and IL-10, dominant products of these three cell types, were detected by using enzyme-linked immunosorbent assays. RESULTS The frequencies of Th17, Tc17 and Treg cells, as well as the serum level of IL-10, were significantly elevated in endometrial carcinoma patients compared to healthy controls. The Th17/Tc17 and Th17/Treg ratios were also observed to change significantly. However, there was no significant difference on the IL-17 levels in the serum. Additionally, immunohistochemistry performed on tumor tissues indicated that the amounts of Th17 and Tc17 increased in the cancer patients. CONCLUSIONS Our data suggests a probable involvement of Th17, Tc17 and Treg cells in the pathogenesis of endometrial carcinoma. Restoring the balance of these cells may help with the research and development of immunotherapies for endometrial carcinoma.
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31
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Terhune J, Berk E, Czerniecki BJ. Dendritic Cell-Induced Th1 and Th17 Cell Differentiation for Cancer Therapy. Vaccines (Basel) 2013; 1:527-49. [PMID: 26344346 PMCID: PMC4494209 DOI: 10.3390/vaccines1040527] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 10/18/2013] [Accepted: 11/07/2013] [Indexed: 02/07/2023] Open
Abstract
The success of cellular immunotherapies against cancer requires the generation of activated CD4+ and CD8+ T-cells. The type of T-cell response generated (e.g., Th1 or Th2) will determine the efficacy of the therapy, and it is generally assumed that a type-1 response is needed for optimal cancer treatment. IL-17 producing T-cells (Th17/Tc17) play an important role in autoimmune diseases, but their function in cancer is more controversial. While some studies have shown a pro-cancerous role for IL-17, other studies have shown an anti-tumor function. The induction of polarized T-cell responses can be regulated by dendritic cells (DCs). DCs are key regulators of the immune system with the ability to affect both innate and adaptive immune responses. These properties have led many researchers to study the use of ex vivo manipulated DCs for the treatment of various diseases, such as cancer and autoimmune diseases. While Th1/Tc1 cells are traditionally used for their potent anti-tumor responses, mounting evidence suggests Th17/Tc17 cells should be utilized by themselves or for the induction of optimal Th1 responses. It is therefore important to understand the factors involved in the induction of both type-1 and type-17 T-cell responses by DCs.
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Affiliation(s)
- Julia Terhune
- Department of Surgery and Harrison Department of Surgical Research, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Erik Berk
- Department of Surgery and Harrison Department of Surgical Research, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Brian J Czerniecki
- Department of Surgery and Harrison Department of Surgical Research, University of Pennsylvania, Philadelphia, PA 19104, USA.
- Rena Rowan Breast Center, University of Pennsylvania, Philadelphia, PA 19104, USA.
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32
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Wu B, Zou Q, Hu Y, Wang B. Interleukin-22 as a molecular adjuvant facilitates IL-17-producing CD8+ T cell responses against a HBV DNA vaccine in mice. Hum Vaccin Immunother 2013; 9:2133-41. [PMID: 23941891 PMCID: PMC3906397 DOI: 10.4161/hv.26047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 07/19/2013] [Accepted: 08/05/2013] [Indexed: 01/06/2023] Open
Abstract
Interleukin-22 (IL-22) is mainly produced by activated Th1 cells, Th17 cells and NK cells and promotes anti-microbial defense, pro-inflammatory and tissue remodeling responses. However, its potential use as a vaccine adjuvant has not been tested. In this study, we tested if a DNA construct expressing IL-22 (pVAX-IL-22) could be used as a molecular adjuvant to enhance host immune responses induced by HBV DNA vaccination (pcD-S2). After immunizing mice with pcD-S2 combined with pVAX-IL-22, we didn't find enhancement of HBsAg-specific antibody responses in comparison to mice immunized with pcD-S2 alone. However, there was an enhancement of the level of IL-17 expression in antigen specific CD8(+) cytotoxic T lymphocytes (Tc17). By using CD8 T-cell knockout (KO) and IL-17 KO mice, Tc17 cells were found to be a dominant population driving cytotoxicity. Importantly, there was a correlation between pVAX-IL-22 enhancement of T lymphocytes and a reduction of HBsAg-positive hepatocytes in HBsAg transgenic mice. These results demonstrate that IL-22 might be used as an effective adjuvant to enhance cellular immune responses during HBsAg DNA vaccination since it can induce Tc17 cells to break tolerance in HBsAg transgenic mice.
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Affiliation(s)
- Bing Wu
- State Key Laboratory for Agro-Biotechnology; College of Biological Science; China Agricultural University; Beijing, P.R. China
| | - Qiang Zou
- State Key Laboratory for Agro-Biotechnology; College of Biological Science; China Agricultural University; Beijing, P.R. China
| | - Yanxin Hu
- College of Veterinary Medicine; China Agricultural University; Beijing, P.R. China
| | - Bin Wang
- State Key Laboratory for Agro-Biotechnology; College of Biological Science; China Agricultural University; Beijing, P.R. China
- Key Laboratory of Medical Molecular Virology of MOH and MOE; Fudan University Shanghai Medical College; Shanghai, P.R. China
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33
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Effect of chronic morphine administration on circulating T cell population dynamics in rhesus macaques. J Neuroimmunol 2013; 265:43-50. [PMID: 24090653 DOI: 10.1016/j.jneuroim.2013.09.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 09/12/2013] [Accepted: 09/14/2013] [Indexed: 01/10/2023]
Abstract
Opioid receptor agonists modulate both innate and adaptive immune responses. In this study, we examined the impact of long-term chronic morphine administration on the circulating T cell population dynamics in rhesus macaques. We found that the numbers of circulating Treg cells, and the functional activity of Th17 cells, were significantly increased with chronic morphine exposure. Our results also show that T cell populations with surface markers characteristic of gut-homing (CD161 and CCR6) and HIV-1 susceptibility (CCR5 and β7 integrin) were increased. These results represent the first detailed report of the impact of chronic morphine administration on circulating T cell dynamics.
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Walline CC, Sehra S, Fisher AJ, Guindon LM, Kratzke IM, Montgomery JB, Lipking KP, Glosson NL, Benson HL, Sandusky GE, Wilkes DS, Brutkiewicz RR, Kaplan MH, Blum JS. Allergic airway disease in mice alters T and B cell responses during an acute respiratory poxvirus infection. PLoS One 2013; 8:e62222. [PMID: 23620814 PMCID: PMC3631162 DOI: 10.1371/journal.pone.0062222] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 03/19/2013] [Indexed: 11/18/2022] Open
Abstract
Pulmonary viral infections can exacerbate or trigger the development of allergic airway diseases via multiple mechanisms depending upon the infectious agent. Respiratory vaccinia virus transmission is well established, yet the effects of allergic airway disease on the host response to intra-pulmonary vaccinia virus infection remain poorly defined. As shown here BALB/c mice with preexisting airway disease infected with vaccinia virus developed more severe pulmonary inflammation, higher lung virus titers and greater weight loss compared with mice inoculated with virus alone. This enhanced viremia was observed despite increased pulmonary recruitment of CD8+ T effectors, greater IFNγ production in the lung, and high serum levels of anti-viral antibodies. Notably, flow cytometric analyses of lung CD8+ T cells revealed a shift in the hierarchy of immunodominant viral epitopes in virus inoculated mice with allergic airway disease compared to mice treated with virus only. Pulmonary IL-10 production by T cells and antigen presenting cells was detected following virus inoculation of animals and increased dramatically in allergic mice exposed to virus. IL-10 modulation of host responses to this respiratory virus infection was greatly influenced by the localized pulmonary microenvironment. Thus, blocking IL-10 signaling in virus-infected mice with allergic airway disease enhanced pulmonary CD4+ T cell production of IFNγ and increased serum anti-viral IgG1 levels. In contrast, pulmonary IFNγ and virus-specific IgG1 levels were reduced in vaccinia virus-treated mice with IL-10 receptor blockade. These observations demonstrate that pre-existing allergic lung disease alters the quality and magnitude of immune responses to respiratory poxviruses through an IL-10-dependent mechanism.
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Affiliation(s)
- Crystal C. Walline
- Department of Microbiology & Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Sarita Sehra
- Department of Pediatrics, HB Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Amanda J. Fisher
- Center for Immunobiology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Lynette M. Guindon
- Department of Microbiology & Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Ian M. Kratzke
- Department of Microbiology & Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Jessica B. Montgomery
- Department of Microbiology & Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Kelsey P. Lipking
- Department of Pathology & Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Nicole L. Glosson
- Department of Microbiology & Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
- Department of Pediatrics, HB Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Heather L. Benson
- Center for Immunobiology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - George E. Sandusky
- Department of Pathology & Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - David S. Wilkes
- Center for Immunobiology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Randy R. Brutkiewicz
- Department of Microbiology & Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Mark H. Kaplan
- Department of Microbiology & Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
- Department of Pediatrics, HB Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Janice S. Blum
- Department of Microbiology & Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
- * E-mail:
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Takaku S, Nakagawa Y, Owaki A, Shimizu M, Takahashi M, Takahashi H. Induction of apoptosis-resistant and TGF-β-insensitive murine CD8(+) cytotoxic T lymphocytes specific for HIV-1 gp160. Cell Immunol 2013; 280:138-47. [PMID: 23399840 DOI: 10.1016/j.cellimm.2012.12.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Revised: 12/10/2012] [Accepted: 12/25/2012] [Indexed: 11/16/2022]
Abstract
Although TGF-β and IL-6 would turn CD8(+) T cells to differentiate into non-cytotoxic state, these treated cells were converted to cytolytic phenotypes after re-exposure to their antigenic epitope in vitro. Here, using spleen cells from TCR transgenic mice expressing TCRαβ genes of clone RT1 recognizing an epitope peptide (P18-I10: RGPGRAFVTI) of HIV-1 gp160, we generated CD8(+) cytotoxic T lymphocytes (CTLs) activated by re-exposure to P18-I10 after primarily cultured with TGF-β and IL-6 in vitro to examine their effector function. The CTLs, having strong cytotoxic activity in vitro, were not only resistant to Fas-FasL mediated apoptosis, but also insensitive to the suppression of their cytotoxicity by re-exposure to TGF-β in vitro. Moreover, adoptive transfer experiments indicated that the CTLs are capable of eliminating recombinant vaccinia virus expressing HIV-1 gp160 in vivo. Taken together, our data suggest that TGF-β and IL-6 may play pivotal roles in inducing apoptosis-resistant and TGF-β-insensitive CTLs in vitro.
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Affiliation(s)
- Shun Takaku
- Department of Microbiology and Immunology, Nippon Medical School, Tokyo 113-8602, Japan.
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Sjöberg V, Sandström O, Hedberg M, Hammarström S, Hernell O, Hammarström ML. Intestinal T-cell responses in celiac disease - impact of celiac disease associated bacteria. PLoS One 2013; 8:e53414. [PMID: 23326425 PMCID: PMC3541273 DOI: 10.1371/journal.pone.0053414] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Accepted: 11/28/2012] [Indexed: 02/06/2023] Open
Abstract
A hallmark of active celiac disease (CD), an inflammatory small-bowel enteropathy caused by permanent intolerance to gluten, is cytokine production by intestinal T lymphocytes. Prerequisites for contracting CD are that the individual carries the MHC class II alleles HLA-DQ2 and/or HLA-DQ8 and is exposed to gluten in the diet. Dysbiosis in the resident microbiota has been suggested to be another risk factor for CD. In fact, rod shaped bacteria adhering to the small intestinal mucosa were frequently seen in patients with CD during the “Swedish CD epidemic” and bacterial candidates could later be isolated from patients born during the epidemic suggesting long-lasting changes in the gut microbiota. Interleukin-17A (IL-17A) plays a role in both inflammation and anti-bacterial responses. In active CD IL-17A was produced by both CD8+ T cells (Tc17) and CD4+ T cells (Th17), with intraepithelial Tc17 cells being the dominant producers. Gluten peptides as well as CD associated bacteria induced IL-17A responses in ex vivo challenged biopsies from patients with inactive CD. The IL-17A response was suppressed in patients born during the epidemic when a mixture of CD associated bacteria was added to gluten, while the reverse was the case in patients born after the epidemic. Under these conditions Th17 cells were the dominant producers. Thus Tc17 and Th17 responses to gluten and bacteria seem to pave the way for the chronic disease with interferon-γ-production by intraepithelial Tc1 cells and lamina propria Th1 cells. The CD associated bacteria and the dysbiosis they might cause in the resident microbiota may be a risk factor for CD either by directly influencing the immune responses in the mucosa or by enhancing inflammatory responses to gluten.
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Affiliation(s)
- Veronika Sjöberg
- Department of Clinical Microbiology, Immunology, Umeå University, Umeå, Sweden
| | - Olof Sandström
- Department of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden
| | - Maria Hedberg
- Department of Clinical Microbiology, Immunology, Umeå University, Umeå, Sweden
| | - Sten Hammarström
- Department of Clinical Microbiology, Immunology, Umeå University, Umeå, Sweden
| | - Olle Hernell
- Department of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden
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Carvalheiro H, da Silva JAP, Souto-Carneiro MM. Potential roles for CD8+ T cells in rheumatoid arthritis. Autoimmun Rev 2013; 12:401-9. [DOI: 10.1016/j.autrev.2012.07.011] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Accepted: 07/18/2012] [Indexed: 02/06/2023]
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Saxena A, Desbois S, Carrié N, Lawand M, Mars LT, Liblau RS. Tc17 CD8+ T Cells Potentiate Th1-Mediated Autoimmune Diabetes in a Mouse Model. THE JOURNAL OF IMMUNOLOGY 2012; 189:3140-9. [DOI: 10.4049/jimmunol.1103111] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Sun K, Hsiao HH, Li M, Ames E, Bouchlaka M, Welniak LA, Hagino T, Jagdeo J, Pai CC, Chen M, Blazar BR, Abedi M, Murphy WJ. IFN-γ receptor-deficient donor T cells mediate protection from graft-versus-host disease and preserve graft-versus-tumor responses after allogeneic bone marrow transplantation. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2012; 189:2033-42. [PMID: 22778394 PMCID: PMC3509544 DOI: 10.4049/jimmunol.1102853] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Graft-versus-host disease (GVHD) is a major complication of allogeneic bone marrow transplantation. It has been previously reported that lung GVHD severity directly correlates with the expansion of donor Th17 cells in the absence of IFN-γ. However, the consequence of Th17-associated lung GVHD in the presence of IFN-γ has not been well characterized. In the current study, T cells from IFN-γ receptor knockout (IFN-γR(-/-)) mice, capable of producing IFN-γ but unable to signal in response to IFN-γ, have been used to elucidate further the role of IFN-γ in GVHD. We found the transfer of donor T cells from either IFN-γR(-/-) or IFN-γ knockout (IFN-γ(-/-)) mice resulted in significant increases in donor Th17 cells in the lung. Marked increases in IL-4-producing Th2 cells infiltrating the lungs were also observed in the mice of donor IFN-γR(-/-) T cells. Notably, despite the presence of these cells, these mice did not show the severe immune-mediated histopathological lung injury observed in mice receiving donor IFN-γ(-/-) T cells. Increases in lung GVHD did occur in mice with donor IFN-γR(-/-) T cells when treated in vivo with anti-IFN-γ demonstrating that the cytokine has a protective role on host tissues in GVHD. A survival benefit from acute GVHD was also observed using donor cells from IFN-γR(-/-) T cells compared with control donors. Importantly, tumor-bearing mice receiving IFN-γR(-/-) T cells versus wild-type donor T cells displayed similar graft-versus-tumor (GVT) effects. These results demonstrate the critical role of IFN-γ on host tissues and cell effector functions in GVHD/GVT.
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Affiliation(s)
- Kai Sun
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA 95817
| | - Hui-Hua Hsiao
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA 95817
- Faculty of Medicine, Kaohsiung Medical University and Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
| | - Minghui Li
- Departments of Microbiology and Immunology, University of Nevada at Reno, Reno NV, 89557
| | - Erik Ames
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA 95817
| | - Myriam Bouchlaka
- Departments of Microbiology and Immunology, University of Nevada at Reno, Reno NV, 89557
| | - Lisbeth A. Welniak
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA 95817
| | - Takeshi Hagino
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA 95817
| | - Jared Jagdeo
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA 95817
- Sacramento VA Medical Center, Mather, CA 95655
| | - Chien-Chun Pai
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA 95817
| | - Mingyi Chen
- Department of Pathology, School of Medicine, University of California, Davis, Sacramento, CA 95817
| | - Bruce R. Blazar
- Cancer Center and Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, MN, 55455
| | - Mehrdad Abedi
- Internal Medicine, School of Medicine, University of California, Davis, Sacramento, CA 95817
| | - William J. Murphy
- Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA 95817
- Internal Medicine, School of Medicine, University of California, Davis, Sacramento, CA 95817
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Nanjappa SG, Heninger E, Wüthrich M, Gasper DJ, Klein BS. Tc17 cells mediate vaccine immunity against lethal fungal pneumonia in immune deficient hosts lacking CD4+ T cells. PLoS Pathog 2012; 8:e1002771. [PMID: 22829762 PMCID: PMC3400565 DOI: 10.1371/journal.ppat.1002771] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Accepted: 05/07/2012] [Indexed: 12/20/2022] Open
Abstract
Vaccines may help reduce the growing incidence of fungal infections in immune-suppressed patients. We have found that, even in the absence of CD4+ T-cell help, vaccine-induced CD8+ T cells persist and confer resistance against Blastomyces dermatitidis and Histoplasma capsulatum. Type 1 cytokines contribute to that resistance, but they also are dispensable. Although the role of T helper 17 cells in immunity to fungi is debated, IL-17 producing CD8+ T cells (Tc17 cells) have not been investigated. Here, we show that Tc17 cells are indispensable in antifungal vaccine immunity in hosts lacking CD4+ T cells. Tc17 cells are induced upon vaccination, recruited to the lung on pulmonary infection, and act non-redundantly in mediating protection in a manner that requires neutrophils. Tc17 cells did not influence type I immunity, nor did the lack of IL-12 signaling augment Tc17 cells, indicating a distinct lineage and function. IL-6 was required for Tc17 differentiation and immunity, but IL-1R1 and Dectin-1 signaling was unexpectedly dispensable. Tc17 cells expressed surface CXCR3 and CCR6, but only the latter was essential in recruitment to the lung. Although IL-17 producing T cells are believed to be short-lived, effector Tc17 cells expressed low levels of KLRG1 and high levels of the transcription factor TCF-1, predicting their long-term survival and stem-cell like behavior. Our work has implications for designing vaccines against fungal infections in immune suppressed patients. Systemic fungal infections have emerged as a public health problem, especially for patients with suppressed immunity. At present, there are no vaccines against fungi, partly because it is hard to elicit strong immunity in immune suppressed patients. We have found however that residual elements of T cell immunity can be harnessed by vaccination even in immune suppressed hosts. We show here that immune suppressed mice lacking T helper cells can still be vaccinated successfully against lethal fungal pneumonia. A population of T cytotoxic IL-17-producing cells (Tc17 cells) is instrumental and indispensible in vaccine protection. We describe here mechanisms that explain how these cells are induced to mature in Tc17 cells, persist for long periods in the body providing “immune memory”, recruit to the site of infection, and clear the tissue of fungi. Our work sheds new light on potent T cells that can be harnessed by vaccine strategies against fungal infection in vulnerable patients.
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Affiliation(s)
- Som Gowda Nanjappa
- The Department of Pediatrics, School of Medicine and Public Health, University of Wisconsin Madison, Madison, Wisconsin, United States of America
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Satoh T, Tajima M, Wakita D, Kitamura H, Nishimura T. The development of IL-17/IFN-γ-double producing CTLs from Tc17 cells is driven by epigenetic suppression of Socs3 gene promoter. Eur J Immunol 2012; 42:2329-42. [PMID: 22674086 DOI: 10.1002/eji.201142240] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 04/19/2012] [Accepted: 05/16/2012] [Indexed: 12/29/2022]
Abstract
The plasticity of T lymphocytes induced by epigenetic modifications of gene promoters may play a pivotal role in controlling their effector functions, which are sometimes causally associated with immune disorders. IL -17-producing T cells, which induce type 17 immune responses, are newly identified pathogenic effector cells. The type 1 signature cytokine IFN-γ strongly inhibits their differentiation, indicating a mutually exclusive relationship between type 17- and type 1-immune responses. However, many reports indicate the presence of a unique IL-17/IFN-γ-double producing T-cell subset in various inflammatory settings, although the mechanisms responsible for their development and their precise functions remain unclear. Here, we demonstrate that IL-12 permits the conversion of mouse IL-17-producing CD8(+) T (Tc17) cells to IL-17/IFN-γ-double producing CD8(+) T (Tc17/IFN-γ) cells, and that this conversion is due to repressive epigenetic modifications of Socs3 gene promoters. Moreover, we show that SOCS3 strongly regulates the capability of Tc17 cells to produce IL-17, in addition to regulating the expression of the type 17-master regulator RORγt. These findings elucidate the mechanisms underlying the conversion of Tc17 cells into Tc17/IFN-γ cells. As these cells are known to have potent antitumor activities, manipulation of these conversion mechanisms for therapeutic tumor immunity may be possible.
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Affiliation(s)
- Takayuki Satoh
- Division of ROYCE' Health Bioscience, Section of Disease Control, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
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McArthur MA, Sztein MB. Heterogeneity of multifunctional IL-17A producing S. Typhi-specific CD8+ T cells in volunteers following Ty21a typhoid immunization. PLoS One 2012; 7:e38408. [PMID: 22679502 PMCID: PMC3367967 DOI: 10.1371/journal.pone.0038408] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2012] [Accepted: 05/04/2012] [Indexed: 11/18/2022] Open
Abstract
Salmonella enterica serovar Typhi (S. Typhi), the causative agent of typhoid fever, continues to cause significant morbidity and mortality world-wide. CD8+ T cells are an important component of the cell mediated immune (CMI) response against S. Typhi. Recently, interleukin (IL)-17A has been shown to contribute to mucosal immunity and protection against intracellular pathogens. To investigate multifunctional IL-17A responses against S. Typhi antigens in T memory subsets, we developed multiparametric flow cytometry methods to detect up to 6 cytokines/chemokines (IL-10, IL-17A, IL-2, interferon-γ (IFN-γ), tumor necrosis factor-α (TNF-α) and macrophage inflammatory protein-1β (MIP-1β)) simultaneously. Five volunteers were immunized with a 4 dose regimen of live-attenuated S. Typhi vaccine (Ty21a), peripheral blood mononuclear cells (PBMC) were isolated before and at 11 time points after immunization, and CMI responses were evaluated. Of the 5 immunized volunteers studied, 3 produced detectable CD8+ T cell responses following stimulation with S. Typhi-infected autologous B lymphoblastoid cell lines (B-LCL). Additionally, 2 volunteers had detectable levels of intracellular cytokines in response to stimulation with S. Typhi-infected HLA-E restricted cells. Although the kinetics of the responses differed among volunteers, all of the responses were bi- or tri-phasic and included multifunctional CD8+ T cells. Virtually all of the IL-17A detected was derived from multifunctional CD8+ T cells. The presence of these multifunctional IL-17A+ CD8+ T cells was confirmed using an unsupervised analysis program, flow cytometry clustering without K (FLOCK). This is the first report of IL-17A production in response to S. Typhi in humans, indicating the presence of a Tc17 response which may be important in protection. The presence of IL-17A in multifunctional cells co-producing Tc1 cytokines (IL-2, IFN-γ and TNF-α) may also indicate that the distinction between Tc17 and Tc1 responses in humans is not as clearly delineated as suggested by in vitro experiments and animal models.
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Affiliation(s)
- Monica A. McArthur
- Center for Vaccine Development, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Marcelo B. Sztein
- Center for Vaccine Development, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
- * E-mail:
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Zou Q, Hu Y, Xue J, Fan X, Jin Y, Shi X, Meng D, Wang X, Feng C, Xie X, Zhang Y, Kang Y, Liang X, Wu B, Wang M, Wang B. Use of praziquantel as an adjuvant enhances protection and Tc-17 responses to killed H5N1 virus vaccine in mice. PLoS One 2012; 7:e34865. [PMID: 22529945 PMCID: PMC3329547 DOI: 10.1371/journal.pone.0034865] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Accepted: 03/06/2012] [Indexed: 11/23/2022] Open
Abstract
Background H5N1 is a highly pathogenic influenza A virus, which can cause severe illness or even death in humans. Although the widely used killed vaccines are able to provide some protection against infection via neutralizing antibodies, cytotoxic T-lymphocyte responses that are thought to eradicate viral infections are lacking. Methodology/Principal Findings Aiming to promote cytotoxic responses against H5N1 infection, we extended our previous finding that praziquantel (PZQ) can act as an adjuvant to induce IL-17-producing CD8+ T cells (Tc17). We found that a single immunization of 57BL/6 mice with killed viral vaccine plus PZQ induced antigen-specific Tc17 cells, some of which also secreted IFN-γ. The induced Tc17 had cytolytic activities. Induction of these cells was impaired in CD8 knockout (KO) or IFN-γ KO mice, and was even lower in IL-17 KO mice. Importantly, the inoculation of killed vaccine with PZQ significantly reduced virus loads in the lung tissues and prolonged survival. Protection against H5N1 virus infection was obtained by adoptively transferring PZQ-primed wild type CD8+ T cells and this was more effective than transfer of activated IFN-γ KO or IL-17 KO CD8+ T cells. Conclusions/Significance Our results demonstrated that adding PZQ to killed H5N1 vaccine could promote broad Tc17-mediated cytotoxic T lymphocyte activity, resulting in improved control of highly pathogenic avian influenza virus infection.
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Affiliation(s)
- Qiang Zou
- Key Laboratory of Medical Molecular Virology of MOH and MOE, Fudan University Shanghai Medical College, Shanghai, China
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, China
| | - Yanxin Hu
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jia Xue
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Xiaoxu Fan
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Yi Jin
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Xianghua Shi
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, China
| | - Di Meng
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Xianzheng Wang
- Key Laboratory of Medical Molecular Virology of MOH and MOE, Fudan University Shanghai Medical College, Shanghai, China
| | - Congcong Feng
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, China
| | - Xiaoping Xie
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, China
| | - Yizhi Zhang
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, China
| | - Youmin Kang
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, China
| | - Xiaoxuan Liang
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, China
| | - Bing Wu
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, China
| | - Ming Wang
- College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Bin Wang
- Key Laboratory of Medical Molecular Virology of MOH and MOE, Fudan University Shanghai Medical College, Shanghai, China
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, China
- * E-mail:
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Kim S, Chang J. Baculovirus-based Vaccine Displaying Respiratory Syncytial Virus Glycoprotein Induces Protective Immunity against RSV Infection without Vaccine-Enhanced Disease. Immune Netw 2012; 12:8-17. [PMID: 22536165 PMCID: PMC3329602 DOI: 10.4110/in.2012.12.1.8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Revised: 01/08/2012] [Accepted: 01/08/2012] [Indexed: 02/03/2023] Open
Abstract
Background Respiratory syncytial virus (RSV) is a major cause of severe lower respiratory tract diseases in infancy and early childhood. Despite its importance as a pathogen, there is no licensed vaccine against RSV yet. The attachment glycoprotein (G) of RSV is a potentially important target for protective antiviral immune responses. Recombinant baculovirus has been recently emerged as a new vaccine vector, since it has intrinsic immunostimulatory properties and good bio-safety profile. Methods We have constructed a recombinant baculovirus-based RSV vaccine, Bac-RSV/G, displaying G glycoprotein, and evaluated immunogenicity and protective efficacy by intranasal immunization of BALB/c mice with Bac-RSV/G. Results Bac-RSV/G efficiently provides protective immunity against RSV challenge. Strong serum IgG and mucosal IgA responses were induced by intranasal immunization with Bac-RSV/G. In addition to humoral immunity, G-specific Th17- as well as Th1-type T-cell responses were detected in the lungs of Bac-RSV/G-immune mice upon RSV challenge. Neither lung eosinophilia nor vaccine-induced weight loss was observed upon Bac-RSV/G immunization and subsequent RSV infection. Conclusion Our data demonstrate that intranasal administration of baculovirus-based Bac-RSV/G vaccine is efficient for the induction of protection against RSV and represents a promising prophylactic vaccination regimen.
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Affiliation(s)
- Sol Kim
- Division of Life & Pharmaceutical Sciences, and Center for Cell Signaling & Drug Discovery Research, Ewha Womans University, Seoul 120-750, Korea
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Grafmueller S, Billerbeck E, Blum HE, Neumann-Haefelin C, Thimme R. Differential antigen specificity of hepatitis C virus-specific interleukin 17- and interferon γ-producing CD8(+) T cells during chronic infection. J Infect Dis 2012; 205:1142-6. [PMID: 22351943 DOI: 10.1093/infdis/jis018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A subset of CD8(+) T cells can secrete interleukin 17 (IL-17). However, very little information is currently available about their antigen specificity, tissue distribution, and biological relevance in chronic human viral infection. To address these issues, we comprehensively analyzed peripheral and intrahepatic CD8(+) T-cell responses in a cohort of patients with chronic hepatitis C virus (HCV) infection for the antigen-specific production of IL-17 and interferon (IFN) γ. We found that HCV-specific IL-17-producing and retinoic acid receptor related orphan receptorγt-expressing CD8(+) T cells are detectable in blood and liver and target different epitopes, compared with IFN-γ-producing CD8(+) T cells. Their highest frequency was found in patients with low inflammatory activity, suggesting a protective role in chronic HCV infection.
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Zou Q, Yao X, Feng J, Yin Z, Flavell R, Hu Y, Zheng G, Jin J, Kang Y, Wu B, Liang X, Feng C, Liu H, Li W, Wang X, Wen Y, Wang B. Praziquantel facilitates IFN-γ-producing CD8+ T cells (Tc1) and IL-17-producing CD8+ T cells (Tc17) responses to DNA vaccination in mice. PLoS One 2011; 6:e25525. [PMID: 21998665 PMCID: PMC3187796 DOI: 10.1371/journal.pone.0025525] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Accepted: 09/05/2011] [Indexed: 12/22/2022] Open
Abstract
Background CD8+ cytotoxic T lymphocytes (CTLs) are crucial for eliminating hepatitis B virus (HBV) infected cells. DNA vaccination, a novel therapeutic strategy for chronic virus infection, has been shown to induce CTL responses. However, accumulated data have shown that CTLs could not be effectively induced by HBV DNA vaccination. Methodology/Principal Findings Here, we report that praziquantel (PZQ), an anti-schistoma drug, could act as an adjuvant to overcome the lack of potent CTL responses by HBV DNA vaccination in mice. PZQ in combination with HBV DNA vaccination augmented the induction of CD8+ T cell-dependent and HBV-specific delayed hypersensitivity responses (DTH) in C57BL/6 mice. Furthermore, the induced CD8+ T cells consisted of both Tc1 and Tc17 subtypes. By using IFN-γ knockout (KO) mice and IL-17 KO mice, both cytokines were found to be involved in the DTH. The relevance of these findings to HBV immunization was established in HBsAg transgenic mice, in which PZQ also augmented the induction of HBV-specific Tc1 and Tc17 cells and resulted in reduction of HBsAg positive hepatocytes. Adoptive transfer experiments further showed that PZQ-primed CD8+ T cells from wild type mice, but not the counterpart from IFN-γ KO or IL-17 KO mice, resulted in elimination of HBsAg positive hepatocytes. Conclusions/Significance Our results suggest that PZQ is an effective adjuvant to facilitate Tc1 and Tc17 responses to HBV DNA vaccination, inducing broad CD8+ T cell-based immunotherapy that breaks tolerance to HBsAg.
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Affiliation(s)
- Qiang Zou
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
| | - Xin Yao
- Key Laboratory of Medical Molecular Virology of MOH and MOE, Fudan University Shanghai Medical College, Shanghai, People's Republic of China
| | - Jin Feng
- Center for Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Zhinan Yin
- College of Life Sciences, Nankai University, Tianjin, People's Republic of China
| | - Richard Flavell
- Department of Immunobiology, Yale School of Medicine, New Haven, Conneticut, United States of America
| | - Yanxin Hu
- College of Veterinary Medicine, China Agricultural University, Beijing, People's Republic of China
| | - Guoxing Zheng
- Department of Biomedical Sciences, University of Illinois College of Medicine, Rockford, Illinois, United States of America
| | - Jin Jin
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
| | - Youmin Kang
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
| | - Bing Wu
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
| | - Xiaoxuan Liang
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
| | - Congcong Feng
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
| | - Hu Liu
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
| | - Weiyi Li
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
| | - Xianzheng Wang
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
| | - Yumei Wen
- Key Laboratory of Medical Molecular Virology of MOH and MOE, Fudan University Shanghai Medical College, Shanghai, People's Republic of China
| | - Bin Wang
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
- Key Laboratory of Medical Molecular Virology of MOH and MOE, Fudan University Shanghai Medical College, Shanghai, People's Republic of China
- * E-mail:
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Lindell DM, Morris SB, White MP, Kallal LE, Lundy PK, Hamouda T, Baker JR, Lukacs NW. A novel inactivated intranasal respiratory syncytial virus vaccine promotes viral clearance without Th2 associated vaccine-enhanced disease. PLoS One 2011; 6:e21823. [PMID: 21789184 PMCID: PMC3137595 DOI: 10.1371/journal.pone.0021823] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Accepted: 06/13/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Respiratory syncytial virus (RSV) is a leading cause of bronchiolitis and pneumonia in young children worldwide, and no vaccine is currently available. Inactivated RSV vaccines tested in the 1960's led to vaccine-enhanced disease upon viral challenge, which has undermined RSV vaccine development. RSV infection is increasingly being recognized as an important pathogen in the elderly, as well as other individuals with compromised pulmonary immunity. A safe and effective inactivated RSV vaccine would be of tremendous therapeutic benefit to many of these populations. PRINCIPAL FINDINGS In these preclinical studies, a mouse model was utilized to assess the efficacy of a novel, nanoemulsion-adjuvanted, inactivated mucosal RSV vaccine. Our results demonstrate that NE-RSV immunization induced durable, RSV-specific humoral responses, both systemically and in the lungs. Vaccinated mice exhibited increased protection against subsequent live viral challenge, which was associated with an enhanced Th1/Th17 response. In these studies, NE-RSV vaccinated mice displayed no evidence of Th2 mediated immunopotentiation, as has been previously described for other inactivated RSV vaccines. CONCLUSIONS These studies indicate that nanoemulsion-based inactivated RSV vaccination can augment viral-specific immunity, decrease mucus production and increase viral clearance, without evidence of Th2 immune mediated pathology.
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Affiliation(s)
- Dennis M. Lindell
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, United States of America
| | - Susan B. Morris
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Maria P. White
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington, United States of America
| | - Lara E. Kallal
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Phillip K. Lundy
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Tarek Hamouda
- NanoBio Corporation, Ann Arbor, Michigan, United States of America
| | - James R. Baker
- Michigan Nanotechnology Institute for Medicine and Biological Sciences, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Nicholas W. Lukacs
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
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Differentiation, phenotype, and function of interleukin-17-producing human Vγ9Vδ2 T cells. Blood 2011; 118:129-38. [PMID: 21505189 DOI: 10.1182/blood-2011-01-331298] [Citation(s) in RCA: 237] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
In healthy adults, the major peripheral blood γδ T-cell subset expresses the Vγ9Vδ2 TCR and displays pleiotropic features. Here we report that coculture of naive Vγ9Vδ2 T cells with phosphoantigens and a cocktail of cytokines (IL-1-β, TGF-β, IL-6, and IL-23), leads to selective expression of the transcription factor RORγt and polarization toward IL-17 production. IL-17(+) Vγ9Vδ2 T cells express the chemokine receptor CCR6 and produce IL-17 but neither IL-22 nor IFN-γ; they have a predominant terminally differentiated (CD27(-)CD45RA(+)) phenotype and express granzyme B, TRAIL, FasL, and CD161. On antigen activation, IL-17(+) Vγ9Vδ2 T cells rapidly induce CXCL8-mediated migration and phagocytosis of neutrophils and IL-17-dependent production of β-defensin by epithelial cells, indicating that they may be involved in host immune responses against infectious microorganisms. Accordingly, an increased percentage of IL-17(+) Vγ9Vδ2 lymphocytes is detected in the peripheral blood and at the site of disease in children with bacterial meningitis, and this pattern was reversed after successful antibacterial therapy. Most notably, the phenotype of IL-17(+) Vγ9Vδ2 T cells in children with meningitis matches that of in vitro differentiated IL-17(+) Vγ9Vδ2 T cells. Our findings delineate a previously unknown subset of human IL-17(+) Vγ9Vδ2 T lymphocytes implicated in the pathophysiology of inflammatory responses during bacterial infections.
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Interplay between modified vaccinia virus Ankara and dendritic cells: phenotypic and functional maturation of bystander dendritic cells. J Virol 2011; 85:5532-45. [PMID: 21411535 DOI: 10.1128/jvi.02267-10] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Modified vaccinia virus Ankara (MVA) is an attenuated poxvirus strain, currently under evaluation as a vaccine vector in various clinical settings. It has been reported that human dendritic cells (DCs) mature after infection with MVA, but reports on the functionality of DCs have so far been controversial. In this work, we studied the phenotype and functionality of MVA-infected DCs. As previously reported, we found that human monocyte-derived DCs upregulated CD86 and HLA-DR in response to MVA infection. Moreover, infected DCs produced a broad array of chemokines and cytokines and were able to activate and induce gamma interferon (IFN-γ) production both in CD4(+) and in CD8(+) allogeneic T cells and in specific autologous peripheral blood lymphocytes (PBLs). Analysis of DC maturation following infection with a recombinant green fluorescent protein (GFP)-expressing MVA revealed that upregulation of CD86 expression was mainly observed in GFP(neg) (bystander) cells. While GFP(pos) (infected) DCs produced tumor necrosis factor alpha (TNF-α), they were unable to produce CXCL10 and were less efficient at inducing IFN-γ production in CEF-specific autologous PBLs. Maturation of bystander DCs could be achieved by incubation with supernatant from infected cultures or with apoptotic infected cells. Type I IFNs were partially responsible for the induction of CXCL10 on bystander DCs. Our findings demonstrate for the first time that, in MVA-infected DC cultures, the leading role with respect to functionality and maturation characteristics is achieved by the bystander DCs.
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