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English K, Kwan R, Holz LE, McGuffog C, Krol JMM, Kempe D, Kaisho T, Heath WR, Lisowski L, Biro M, McCaughan GW, Bowen DG, Bertolino P. A hepatic network of dendritic cells mediates CD4 T cell help outside lymphoid organs. Nat Commun 2024; 15:1261. [PMID: 38341416 PMCID: PMC10858872 DOI: 10.1038/s41467-024-45612-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 01/30/2024] [Indexed: 02/12/2024] Open
Abstract
While CD4+ T cells are a prerequisite for CD8+ T cell-mediated protection against intracellular hepatotropic pathogens, the mechanisms facilitating the transfer of CD4-help to intrahepatic CD8+ T cells are unknown. Here, we developed an experimental system to investigate cognate CD4+ and CD8+ T cell responses to a model-antigen expressed de novo in hepatocytes and reveal that after initial priming, effector CD4+ and CD8+ T cells migrate into portal tracts and peri-central vein regions of the liver where they cluster with type-1 conventional dendritic cells. These dendritic cells are locally licensed by CD4+ T cells and expand the number of CD8+ T cells in situ, resulting in larger effector and memory CD8+ T cell pools. These findings reveal that CD4+ T cells promote intrahepatic immunity by amplifying the CD8+ T cell response via peripheral licensing of hepatic type-1 conventional dendritic cells and identify intrahepatic perivascular compartments specialized in facilitating effector T cell-dendritic cell interactions.
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Affiliation(s)
- Kieran English
- Centenary Institute and The University of Sydney, AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, NSW, Australia
- VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Rain Kwan
- Centenary Institute and The University of Sydney, AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Lauren E Holz
- Department of Microbiology and Immunology at The Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC, Australia
| | - Claire McGuffog
- Centenary Institute and The University of Sydney, AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Jelte M M Krol
- Centenary Institute and The University of Sydney, AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, NSW, Australia
- Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Daryan Kempe
- EMBL Australia, Single Molecule Science node, School of Biomedical Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Tsuneyasu Kaisho
- Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama, Japan
| | - William R Heath
- Department of Microbiology and Immunology at The Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC, Australia
| | - Leszek Lisowski
- Children's Medical Research Institute, Translational Vectorology Research Unit, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW, Australia
- Laboratory of Molecular Oncology and Innovative Therapies, Military Institute of Medicine, Warsaw, Poland
| | - Maté Biro
- EMBL Australia, Single Molecule Science node, School of Biomedical Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Geoffrey W McCaughan
- Centenary Institute and The University of Sydney, AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - David G Bowen
- Centenary Institute and The University of Sydney, AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, NSW, Australia.
| | - Patrick Bertolino
- Centenary Institute and The University of Sydney, AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, NSW, Australia.
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2
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Xu X, Yi C, Feng T, Ge Y, Liu M, Wu C, Yu H, Chen X, Gopinath SCB, Zhang W, Zhao L, Zou J. Regulating tumor microenvironments by a lymph node-targeting adjuvant via tumor-specific CTL-derived IFNγ. Clin Immunol 2023:109685. [PMID: 37406980 DOI: 10.1016/j.clim.2023.109685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 04/29/2023] [Accepted: 06/27/2023] [Indexed: 07/07/2023]
Abstract
Inducing tumor-specific T cell responses and regulating suppressive tumor microenvironments have been a challenge for effective tumor therapy. CpG (ODN), the Toll-like receptor 9 agonist, has been widely used as adjuvants of cancer vaccines to induce T cell responses. We developed a novel adjuvant to improve the targeting of lymph nodes. CpG were modified with lipid and glycopolymers by the combination of photo-induced RAFT polymerization and click chemistry, and the novel adjuvant was termed as lipid-glycoadjuvant@AuNPs (LCpG). OVA protein was used as model antigen and melanoma model was established to test the immunotherapy effect of the adjuvant. In tumor model, the antitumor effect and mechanism of LCpG on the response of CTLs were examined by flow cytometry and cell cytotoxicity assay. The effects of LCpG on macrophage polarization and Tregs differentiation in tumor microenvironment were also studied by cell depletion assay and cytokine neutralization assay. We also tested the therapeutic effect of the combination of the adjuvant and anti-PD-1 treatment. LCpG could be rapidly transported to and retained longer in the lymphoid nodes than unmodified CpG. In melanoma model, LCpG controlled both primary tumor and its metastasis, and established long-term memory. In spleen and tumor draining lymphoid nodes, LCpG activated tumor-specific Tc1 responses, with increased CD8+ T-cell proliferation, antigen-specific Tc1 cytokine production and specific-tumor killing capacity. In tumor microenvironments, antigen-specific Tc1 induced by the LCpG promoted CTL infiltration, skewed tumor associated macrophages to M1 phenotype, regulated Treg and induced proinflammatory cytokines production in a CTL-derived IFN-γ-dependent manner. In vivo cell depletion and adoptive transfer experiments confirmed that antitumor activity of LCpG included vaccine was mainly dependent on CTL-derived IFN-γ. The anti-tumor efficacy of LCpG was dramatically enhanced when combined with anti-PD1 immunotherapy. LCpG was a promising adjuvant for vaccine formulation which could augment tumor-specific Tc1 activity, and regulate tumor microenvironments.
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Affiliation(s)
- Xiaojing Xu
- College of Basic Medicine and Biological Sciences, Medical Department, Soochow University, Suzhou 215123, Jiangsu, China
| | - Cheng Yi
- College of Basic Medicine and Biological Sciences, Medical Department, Soochow University, Suzhou 215123, Jiangsu, China; Institute of Blood and Marrow Transplantation, Department of Hematology, Collaborative Innovation Center of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China
| | - Tianyun Feng
- College of Basic Medicine and Biological Sciences, Medical Department, Soochow University, Suzhou 215123, Jiangsu, China; Institute of Blood and Marrow Transplantation, Department of Hematology, Collaborative Innovation Center of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China
| | - Youzhen Ge
- College of Basic Medicine and Biological Sciences, Medical Department, Soochow University, Suzhou 215123, Jiangsu, China; Institute of Blood and Marrow Transplantation, Department of Hematology, Collaborative Innovation Center of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China
| | - Mengjie Liu
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, Jiangsu, China
| | - Cenhao Wu
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China
| | - Hao Yu
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China
| | - Xiang Chen
- Jiangsu Key Lab of Zoonosis/Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, Jiangsu, China
| | - Subash C B Gopinath
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis, Perlis, Malaysia; Micro System Technology, Centre of Excellence (CoE), Universiti Malaysia Perlis, Perlis, Malaysia; Institute of Nano Electronic Engineering, Universiti Malaysia Perlis, Perlis, Malaysia
| | - Weidong Zhang
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, Jiangsu, China.
| | - Lixiang Zhao
- College of Basic Medicine and Biological Sciences, Medical Department, Soochow University, Suzhou 215123, Jiangsu, China.
| | - Jun Zou
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China.
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Provine NM, Klenerman P. Adenovirus vector and mRNA vaccines: Mechanisms regulating their immunogenicity. Eur J Immunol 2022:10.1002/eji.202250022. [PMID: 36330560 PMCID: PMC9877955 DOI: 10.1002/eji.202250022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 09/05/2022] [Accepted: 11/02/2022] [Indexed: 11/06/2022]
Abstract
Replication-incompetent adenovirus (Ad) vector and mRNA-lipid nanoparticle (LNP) constructs represent two modular vaccine platforms that have attracted substantial interest over the past two decades. Due to the COVID-19 pandemic and the rapid development of multiple successful vaccines based on these technologies, there is now clear real-world evidence of the utility and efficacy of these platforms. Considerable optimization and refinement efforts underpin the successful application of these technologies. Despite this, our understanding of the specific pathways and processes engaged by these vaccines to stimulate the immune response remains incomplete. This review will synthesize our current knowledge of the specific mechanisms by which CD8+ T cell and antibody responses are induced by each of these vaccine platforms, and how this can be impacted by specific vaccine construction techniques. Key gaps in our knowledge are also highlighted, which can hopefully focus future studies.
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Affiliation(s)
- Nicholas M. Provine
- Translational Gastroenterology UnitNuffield Department of MedicineUniversity of OxfordOxfordUK
| | - Paul Klenerman
- Translational Gastroenterology UnitNuffield Department of MedicineUniversity of OxfordOxfordUK,Peter Medawar Building for Pathogen ResearchUniversity of OxfordOxfordUK
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Basu A, Ramamoorthi G, Albert G, Gallen C, Beyer A, Snyder C, Koski G, Disis ML, Czerniecki BJ, Kodumudi K. Differentiation and Regulation of T H Cells: A Balancing Act for Cancer Immunotherapy. Front Immunol 2021; 12:669474. [PMID: 34012451 PMCID: PMC8126720 DOI: 10.3389/fimmu.2021.669474] [Citation(s) in RCA: 121] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 04/19/2021] [Indexed: 12/22/2022] Open
Abstract
Current success of immunotherapy in cancer has drawn attention to the subsets of TH cells in the tumor which are critical for activation of anti-tumor response either directly by themselves or by stimulating cytotoxic T cell activity. However, presence of immunosuppressive pro-tumorigenic TH subsets in the tumor milieu further contributes to the complexity of regulation of TH cell-mediated immune response. In this review, we present an overview of the multifaceted positive and negative effects of TH cells, with an emphasis on regulation of different TH cell subtypes by various immune cells, and how a delicate balance of contradictory signals can influence overall success of cancer immunotherapy. We focus on the regulatory network that encompasses dendritic cell-induced activation of CD4+ TH1 cells and subsequent priming of CD8+ cytotoxic T cells, along with intersecting anti-inflammatory and pro-tumorigenic TH2 cell activity. We further discuss how other tumor infiltrating immune cells such as immunostimulatory TH9 and Tfh cells, immunosuppressive Treg cells, and the duality of TH17 function contribute to tip the balance of anti- vs pro-tumorigenic TH responses in the tumor. We highlight the developing knowledge of CD4+ TH1 immune response against neoantigens/oncodrivers, impact of current immunotherapy strategies on CD4+ TH1 immunity, and how opposing action of TH cell subtypes can be explored further to amplify immunotherapy success in patients. Understanding the nuances of CD4+ TH cells regulation and the molecular framework undergirding the balancing act between anti- vs pro-tumorigenic TH subtypes is critical for rational designing of immunotherapies that can bypass therapeutic escape to maximize the potential of immunotherapy.
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Affiliation(s)
- Amrita Basu
- Clinical Science Division, Moffitt Cancer Center, Tampa, FL, United States
| | | | - Gabriella Albert
- Clinical Science Division, Moffitt Cancer Center, Tampa, FL, United States
| | - Corey Gallen
- Clinical Science Division, Moffitt Cancer Center, Tampa, FL, United States
| | - Amber Beyer
- Clinical Science Division, Moffitt Cancer Center, Tampa, FL, United States
| | - Colin Snyder
- Clinical Science Division, Moffitt Cancer Center, Tampa, FL, United States
| | - Gary Koski
- Department of Biological Sciences, Kent State University, Kent, OH, United States
| | - Mary L Disis
- UW Medicine Cancer Vaccine Institute, University of Washington, Seattle, WA, United States
| | - Brian J Czerniecki
- Clinical Science Division, Moffitt Cancer Center, Tampa, FL, United States.,Department of Oncological Sciences, University of South Florida, Tampa, FL, United States.,Department of Breast Cancer Program, Moffitt Cancer Center, Tampa, FL, United States
| | - Krithika Kodumudi
- Clinical Science Division, Moffitt Cancer Center, Tampa, FL, United States.,Department of Biological Sciences, Kent State University, Kent, OH, United States
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5
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Kedzierska K, Koutsakos M. The ABC of Major Histocompatibility Complexes and T Cell Receptors in Health and Disease. Viral Immunol 2021; 33:160-178. [PMID: 32286182 PMCID: PMC7185345 DOI: 10.1089/vim.2019.0184] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
A seminal discovery of major histocompatibility complex (MHC) restriction in T cell recognition by Peter Doherty and Rolf Zinkernagel has led to 45 years of exciting research on the mechanisms governing peptide MHC (pMHC) recognition by T cell receptors (TCRs) and their importance in health and disease. T cells provide a significant level of protection against viral, bacterial, and parasitic infections, as well as tumors, hence, the generation of protective T cell responses is a primary goal for cell-mediated vaccines and immunotherapies. Understanding the mechanisms underlying generation of optimal high-avidity effector T cell responses, memory development, maintenance, and recall is of major importance for the rational design of preventative and therapeutic vaccines/immunotherapies. In this review, we summarize the lessons learned over the last four decades and outline our current understanding of the basis and consequences of pMHC/TCR interactions on T cell development and function, and TCR diversity and composition, driving better clinical outcomes and prevention of viral escape. We also discuss the current models of T cell memory formation and determinants of immunodominant T cell responses in animal models and humans. As TCR composition and diversity can affect both the protective capacity of T cells and protection against viral escape, defining the spectrum of TCR selection has implications for improving the functional efficacy of effector T cell responsiveness and memory formation.
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Affiliation(s)
- Katherine Kedzierska
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Marios Koutsakos
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
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Zhang S, Springer LE, Rao HZ, Espinosa Trethewy RG, Bishop LM, Hancock MH, Grey F, Snyder CM. Hematopoietic cell-mediated dissemination of murine cytomegalovirus is regulated by NK cells and immune evasion. PLoS Pathog 2021; 17:e1009255. [PMID: 33508041 PMCID: PMC7872266 DOI: 10.1371/journal.ppat.1009255] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 02/09/2021] [Accepted: 12/21/2020] [Indexed: 02/06/2023] Open
Abstract
Cytomegalovirus (CMV) causes clinically important diseases in immune compromised and immune immature individuals. Based largely on work in the mouse model of murine (M)CMV, there is a consensus that myeloid cells are important for disseminating CMV from the site of infection. In theory, such dissemination should expose CMV to cell-mediated immunity and thus necessitate evasion of T cells and NK cells. However, this hypothesis remains untested. We constructed a recombinant MCMV encoding target sites for the hematopoietic specific miRNA miR-142-3p in the essential viral gene IE3. This virus disseminated poorly to the salivary gland following intranasal or footpad infections but not following intraperitoneal infection in C57BL/6 mice, demonstrating that dissemination by hematopoietic cells is essential for specific routes of infection. Remarkably, depletion of NK cells or T cells restored dissemination of this virus in C57BL/6 mice after intranasal infection, while dissemination occurred normally in BALB/c mice, which lack strong NK cell control of MCMV. These data show that cell-mediated immunity is responsible for restricting MCMV to hematopoietic cell-mediated dissemination. Infected hematopoietic cells avoided cell-mediated immunity via three immune evasion genes that modulate class I MHC and NKG2D ligands (m04, m06 and m152). MCMV lacking these 3 genes spread poorly to the salivary gland unless NK cells were depleted, but also failed to replicate persistently in either the nasal mucosa or salivary gland unless CD8+ T cells were depleted. Surprisingly, CD8+ T cells primed after intranasal infection required CD4+ T cell help to expand and become functional. Together, our data suggest that MCMV can use both hematopoietic cell-dependent and -independent means of dissemination after intranasal infection and that cell mediated immune responses restrict dissemination to infected hematopoietic cells, which are protected from NK cells during dissemination by viral immune evasion. In contrast, viral replication within mucosal tissues depends on evasion of T cells. Cytomegalovirus (CMV) is a common cause of disease in immune compromised individuals as well as a common cause of congenital infections leading to disease in newborns. The virus is thought to enter primarily via mucosal barrier tissues, such as the oral and nasal mucosa. However, it is not clear how the virus escapes these barrier tissues to reach distant sites. In this study, we used a mouse model of CMV infection. Our data illustrate a complex balance between the immune system and viral infection of “myeloid cells”, which are most commonly thought to carry the virus around the body after infection. In particular, our data suggest that robust immune responses at the site of infection force the virus to rely on myeloid cells to escape the site of infection. Moreover, viral genes designed to evade these immune responses were needed to protect the virus during and after its spread to distant sites. Together, this work sheds light on the mechanisms of immune control and viral survival during CMV infection of mucosal tissues and spread to distant sites of the body.
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Affiliation(s)
- Shunchuan Zhang
- Department of Microbiology and Immunology, Sidney Kimmel Medical College, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America
| | - Lauren E. Springer
- Department of Microbiology and Immunology, Sidney Kimmel Medical College, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America
| | - Han-Zhi Rao
- Department of Microbiology and Immunology, Sidney Kimmel Medical College, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America
| | - Renee G. Espinosa Trethewy
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
| | - Lindsey M. Bishop
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
| | - Meaghan H. Hancock
- Vaccine and Gene Therapy Institute, Oregon Health & Science University, Beaverton, Oregon, United States of America
| | - Finn Grey
- Division of Infection and Immunity, The Roslin Institute, University of Edinburgh, Easter Bush, Midlothian, United Kingdom
- * E-mail: (FG); (CMS)
| | - Christopher M. Snyder
- Department of Microbiology and Immunology, Sidney Kimmel Medical College, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America
- * E-mail: (FG); (CMS)
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7
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Selective reconstitution of IFN‑γ gene function in Ncr1+ NK cells is sufficient to control systemic vaccinia virus infection. PLoS Pathog 2020; 16:e1008279. [PMID: 32023327 PMCID: PMC7028289 DOI: 10.1371/journal.ppat.1008279] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 02/18/2020] [Accepted: 12/11/2019] [Indexed: 12/22/2022] Open
Abstract
IFN-γ is an enigmatic cytokine that shows direct anti-viral effects, confers upregulation of MHC-II and other components relevant for antigen presentation, and that adjusts the composition and balance of complex cytokine responses. It is produced during immune responses by innate as well as adaptive immune cells and can critically affect the course and outcome of infectious diseases, autoimmunity, and cancer. To selectively analyze the function of innate immune cell-derived IFN-γ, we generated conditional IFN-γOFF mice, in which endogenous IFN-γ expression is disrupted by a loxP flanked gene trap cassette inserted into the first intron of the IFN-γ gene. IFN-γOFF mice were intercrossed with Ncr1-Cre or CD4-Cre mice that express Cre mainly in NK cells (IFN-γNcr1-ON mice) or T cells (IFN-γCD4-ON mice), respectively. Rosa26RFP reporter mice intercrossed with Ncr1-Cre mice showed selective RFP expression in more than 80% of the NK cells, while upon intercrossing with CD4-Cre mice abundant RFP expression was detected in T cells, but also to a minor extent in other immune cell subsets. Previous studies showed that IFN-γ expression is needed to promote survival of vaccinia virus (VACV) infection. Interestingly, during VACV infection of wild type and IFN-γCD4-ON mice two waves of serum IFN-γ were induced that peaked on day 1 and day 3/4 after infection. Similarly, VACV infected IFN-γNcr1-ON mice mounted two waves of IFN-γ responses, of which the first one was moderately and the second one profoundly reduced when compared with WT mice. Furthermore, IFN-γNcr1-ON as well as IFN-γCD4-ON mice survived VACV infection, whereas IFN-γOFF mice did not. As expected, ex vivo analysis of splenocytes derived from VACV infected IFN-γNcr1-ON mice showed IFN-γ expression in NK cells, but not T cells, whereas IFN-γOFF mice showed IFN-γ expression neither in NK cells nor T cells. VACV infected IFN-γNcr1-ON mice mounted normal cytokine responses, restored neutrophil accumulation, and showed normal myeloid cell distribution in blood and spleen. Additionally, in these mice normal MHC-II expression was detected on peripheral macrophages, whereas IFN-γOFF mice did not show MHC-II expression on such cells. In conclusion, upon VACV infection Ncr1 positive cells including NK cells mount two waves of early IFN-γ responses that are sufficient to promote the induction of protective anti-viral immunity. Viral infections induce interferon (IFN) responses that constitute a first line of defense. Type II IFN (IFN-γ) is required for protection against lethal vaccinia virus (VACV) infection. To address the cellular origin of protective IFN-γ responses during VACV infection, we generated IFN-γOFF mice, in which the endogenous IFN-γ gene function can be reconstituted in a Cre-dependent manner. IFN-γOFF mice were intercrossed with Ncr1-Cre mice that express Cre selectively in Ncr1+ innate cell subsests such as NK cells. Surprisingly, VACV infected IFN-γNcr1-ON mice mounted two waves of IFN-γ responses. Reconstitution of innate IFN-γ was sufficient to restore cytokine responses that supported normal myeloid cell distribution and survival upon VACV infection. In conclusion, IFN-γ derived from Ncr1+ innate immune cells is sufficient to elicit fully effective immune responses upon VACV infection. Our new mouse model is suitable to further address the role of Ncr1+ cell-derived IFN-γ also in other models of infection, as well as of autoimmunity and cancer.
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Kahan SM, Zajac AJ. Immune Exhaustion: Past Lessons and New Insights from Lymphocytic Choriomeningitis Virus. Viruses 2019; 11:E156. [PMID: 30781904 PMCID: PMC6410286 DOI: 10.3390/v11020156] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/08/2019] [Accepted: 02/09/2019] [Indexed: 12/16/2022] Open
Abstract
Lymphocytic choriomeningitis virus (LCMV) is a paradigm-forming experimental system with a remarkable track record of contributing to the discovery of many of the fundamental concepts of modern immunology. The ability of LCMV to establish a chronic infection in immunocompetent adult mice was instrumental for identifying T cell exhaustion and this system has been invaluable for uncovering the complexity, regulators, and consequences of this state. These findings have been directly relevant for understanding why ineffective T cell responses commonly arise during many chronic infections including HIV and HCV, as well as during tumor outgrowth. The principal feature of exhausted T cells is the inability to elaborate the array of effector functions necessary to contain the underlying infection or tumor. Using LCMV to determine how to prevent and reverse T cell exhaustion has highlighted the potential of checkpoint blockade therapies, most notably PD-1 inhibition strategies, for improving cellular immunity under conditions of antigen persistence. Here, we discuss the discovery, properties, and regulators of exhausted T cells and highlight how LCMV has been at the forefront of advancing our understanding of these ineffective responses.
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Affiliation(s)
- Shannon M Kahan
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
| | - Allan J Zajac
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
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9
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Littringer K, Moresi C, Rakebrandt N, Zhou X, Schorer M, Dolowschiak T, Kirchner F, Rost F, Keller CW, McHugh D, LeibundGut-Landmann S, Robinson MD, Joller N. Common Features of Regulatory T Cell Specialization During Th1 Responses. Front Immunol 2018; 9:1344. [PMID: 29951069 PMCID: PMC6008317 DOI: 10.3389/fimmu.2018.01344] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 05/30/2018] [Indexed: 12/29/2022] Open
Abstract
CD4+Foxp3+ Treg cells are essential for maintaining self-tolerance and preventing excessive immune responses. In the context of Th1 immune responses, co-expression of the Th1 transcription factor T-bet with Foxp3 is essential for Treg cells to control Th1 responses. T-bet-dependent expression of CXCR3 directs Treg cells to the site of inflammation. However, the suppressive mediators enabling effective control of Th1 responses at this site are unknown. In this study, we determined the signature of CXCR3+ Treg cells arising in Th1 settings and defined universal features of Treg cells in this context using multiple Th1-dominated infection models. Our analysis defined a set of Th1-specific co-inhibitory receptors and cytotoxic molecules that are specifically expressed in Treg cells during Th1 immune responses in mice and humans. Among these, we identified the novel co-inhibitory receptor CD85k as a functional predictor for Treg-mediated suppression specifically of Th1 responses, which could be explored therapeutically for selective immune suppression in autoimmunity.
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Affiliation(s)
| | - Claudia Moresi
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Nikolas Rakebrandt
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Xiaobei Zhou
- Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.,SIB Swiss Institute of Bioinformatics, University of Zurich, Zurich, Switzerland
| | - Michelle Schorer
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Tamas Dolowschiak
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Florian Kirchner
- Section of Immunology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Felix Rost
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Christian W Keller
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Donal McHugh
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | | | - Mark D Robinson
- Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.,SIB Swiss Institute of Bioinformatics, University of Zurich, Zurich, Switzerland
| | - Nicole Joller
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
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10
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Durlanik S, Loyal L, Stark R, Sercan Alp Ö, Hartung A, Radbruch A, von Herrath M, Matzmohr N, Frentsch M, Thiel A. CD40L expression by CD4 + but not CD8 + T cells regulates antiviral immune responses in acute LCMV infection in mice. Eur J Immunol 2016; 46:2566-2573. [PMID: 27562840 DOI: 10.1002/eji.201646420] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 06/29/2016] [Accepted: 08/24/2016] [Indexed: 12/16/2022]
Abstract
CD40-CD40 ligand (CD40L) signaling plays multiple indispensable roles in cellular and humoral immunity. Impaired memory T-cell responses in the absence of CD40L have been well documented, but the requirement of this interaction for efficient priming of CD8+ T cells especially under inflammatory conditions has been under debate. In contrast to previous publications, we report here that virus-specific CD8+ T-cell responses as well as viral clearance are affected not only in the memory but also in the effector phase in CD40L-/- mice infected with lymphocytic choriomeningitis virus (LCMV) Armstrong strain. Interestingly, a considerable part of the LCMV-specific effector and memory T cells consists of CD40L+ CD8+ T cells. However, deficiency of CD40L in CD8+ T cells did influence neither the quantity nor the quality of primary T-cell responses in LCMV infection. Virus-specific CD8+ T cells in conditional knockout mice, with a selective deletion of the CD40L in CD8+ T cells, were fully functional regarding cytokine production and efficient pathogen clearance. Thus, our results unambiguously demonstrate that while CD40L is critical to generate effective primary CD8+ T-cell responses also under inflammatory conditions, CD40L expression by CD8+ T cells themselves is dispensable in acute LCMV infection.
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Affiliation(s)
- Sibel Durlanik
- Regenerative Immunology and Aging, Berlin-Brandenburger Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Berlin, Germany.,Cellular Biology, German Rheumatism Research Center (DRFZ), Institute of the Leibniz Association, Berlin, Germany
| | - Lucie Loyal
- Regenerative Immunology and Aging, Berlin-Brandenburger Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Regina Stark
- Regenerative Immunology and Aging, Berlin-Brandenburger Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Berlin, Germany.,Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam, the Netherlands
| | - Özen Sercan Alp
- Cellular Biology, German Rheumatism Research Center (DRFZ), Institute of the Leibniz Association, Berlin, Germany
| | - Anett Hartung
- Regenerative Immunology and Aging, Berlin-Brandenburger Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Andreas Radbruch
- Cellular Biology, German Rheumatism Research Center (DRFZ), Institute of the Leibniz Association, Berlin, Germany
| | - Matthias von Herrath
- Type 1 Diabetes Center, La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA.,Novo Nordisk Diabetes Research and Development Center, Seattle, WA, USA
| | - Nadine Matzmohr
- Regenerative Immunology and Aging, Berlin-Brandenburger Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Berlin, Germany.,Unit 303, Efficacy and Safety Assessment of Veterinary Drugs, Federal Office of Consumer Protection and Food Safety (BVL), Berlin, Germany
| | - Marco Frentsch
- Regenerative Immunology and Aging, Berlin-Brandenburger Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Andreas Thiel
- Regenerative Immunology and Aging, Berlin-Brandenburger Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Berlin, Germany.
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11
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Provine NM, Larocca RA, Aid M, Penaloza-MacMaster P, Badamchi-Zadeh A, Borducchi EN, Yates KB, Abbink P, Kirilova M, Ng'ang'a D, Bramson J, Haining WN, Barouch DH. Immediate Dysfunction of Vaccine-Elicited CD8+ T Cells Primed in the Absence of CD4+ T Cells. THE JOURNAL OF IMMUNOLOGY 2016; 197:1809-22. [PMID: 27448585 DOI: 10.4049/jimmunol.1600591] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 06/20/2016] [Indexed: 01/08/2023]
Abstract
CD4(+) T cell help is critical for optimal CD8(+) T cell memory differentiation and maintenance in many experimental systems. In addition, many reports have identified reduced primary CD8(+) T cell responses in the absence of CD4(+) T cell help, which often coincides with reduced Ag or pathogen clearance. In this study, we demonstrate that absence of CD4(+) T cells at the time of adenovirus vector immunization of mice led to immediate impairments in early CD8(+) T cell functionality and differentiation. Unhelped CD8(+) T cells exhibited a reduced effector phenotype, decreased ex vivo cytotoxicity, and decreased capacity to produce cytokines. This dysfunctional state was imprinted within 3 d of immunization. Unhelped CD8(+) T cells expressed elevated levels of inhibitory receptors and exhibited transcriptomic exhaustion and anergy profiles by gene set enrichment analysis. Dysfunctional, impaired effector differentiation also occurred following immunization of CD4(+) T cell-deficient mice with a poxvirus vector. This study demonstrates that following priming with viral vectors, CD4(+) T cell help is required to promote both the expansion and acquisition of effector functions by CD8(+) T cells, which is accomplished by preventing immediate dysfunction.
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Affiliation(s)
- Nicholas M Provine
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Rafael A Larocca
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Malika Aid
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Pablo Penaloza-MacMaster
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Alexander Badamchi-Zadeh
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Erica N Borducchi
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Kathleen B Yates
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215
| | - Peter Abbink
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Marinela Kirilova
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - David Ng'ang'a
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Jonathan Bramson
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario L8S 4K1, Canada; Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario L8S 4K1, Canada; McMaster Immunology Research Centre, McMaster University, Hamilton, Ontario L8S 4K1, Canada
| | - W Nicholas Haining
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215; Broad Institute of MIT and Harvard, Cambridge, MA 02142; Division of Hematology/Oncology, Children's Hospital, Harvard Medical School, Boston, MA 02115; and
| | - Dan H Barouch
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215; Ragon Institute of MGH, MIT, and Harvard, Boston, MA 02139
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12
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Abstract
Following infection, T cells differentiate into a heterogeneous population of effector T cells that can mediate pathogen clearance. A subset of these effector T cells possesses the ability to survive long term and mature into memory T cells that can provide long-term immunity. Understanding the signals that regulate the development of memory T cells is crucial to efforts to design vaccines capable of eliciting T cell-based immunity. CD4(+) T cells are essential in the formation of protective memory CD8(+) T cells following infection or immunization. However, until recently, the mechanisms by which CD4(+) T cells act to support memory CD8(+) T cell development following infection were unclear. Here, we discuss recent studies that provide insight into the multifaceted role of CD4(+) T cells in the regulation of memory CD8(+) T cell differentiation.
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13
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Greyer M, Whitney P, Stock A, Davey G, Tebartz C, Bachem A, Mintern J, Strugnell R, Turner S, Gebhardt T, O’Keeffe M, Heath W, Bedoui S. T Cell Help Amplifies Innate Signals in CD8 + DCs for Optimal CD8 + T Cell Priming. Cell Rep 2016; 14:586-597. [DOI: 10.1016/j.celrep.2015.12.058] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 11/02/2015] [Accepted: 12/10/2015] [Indexed: 12/29/2022] Open
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14
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Eickhoff S, Brewitz A, Gerner MY, Klauschen F, Komander K, Hemmi H, Garbi N, Kaisho T, Germain RN, Kastenmüller W. Robust Anti-viral Immunity Requires Multiple Distinct T Cell-Dendritic Cell Interactions. Cell 2015; 162:1322-37. [PMID: 26296422 DOI: 10.1016/j.cell.2015.08.004] [Citation(s) in RCA: 238] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 06/07/2015] [Accepted: 07/23/2015] [Indexed: 11/30/2022]
Abstract
Host defense against viruses and intracellular parasites depends on effector CD8(+) T cells, whose optimal clonal expansion, differentiation, and memory properties require signals from CD4(+) T cells. Here, we addressed the role of dendritic cell (DC) subsets in initial activation of the two T cell types and their co-operation. Surprisingly, initial priming of CD4(+) and CD8(+) T cells was spatially segregated within the lymph node and occurred on different DCs with temporally distinct patterns of antigen presentation via MHCI versus MHCII molecules. DCs that co-present antigen via both MHC molecules were detected at a later stage; these XCR1(+) DCs are the critical platform involved in CD4(+) T cell augmentation of CD8(+) T cell responses. These findings delineate the complex choreography of cellular interactions underlying effective cell-mediated anti-viral responses, with implications for basic DC subset biology, as well as for translational application to the development of vaccines that evoke optimal T cell immunity.
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Affiliation(s)
- Sarah Eickhoff
- Institute for Experimental Immunology, University of Bonn, 53105 Bonn, Germany
| | - Anna Brewitz
- Institute for Experimental Immunology, University of Bonn, 53105 Bonn, Germany
| | - Michael Y Gerner
- Lymphocyte Biology Section, Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Frederick Klauschen
- Institute of Pathology, Charité University Hospital Berlin, 10117 Berlin, Germany
| | - Karl Komander
- Institute for Experimental Immunology, University of Bonn, 53105 Bonn, Germany
| | - Hiroaki Hemmi
- Laboratory for Immune Regulation, World Premier International Immunology Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan; Laboratory for Inflammatory Regulation, RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Yokohama, Kanagawa 230-0045, Japan
| | - Natalio Garbi
- Institute for Experimental Immunology, University of Bonn, 53105 Bonn, Germany
| | - Tsuneyasu Kaisho
- Laboratory for Immune Regulation, World Premier International Immunology Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan; Laboratory for Inflammatory Regulation, RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Yokohama, Kanagawa 230-0045, Japan
| | - Ronald Nathan Germain
- Lymphocyte Biology Section, Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
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15
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Zhang X, Starnbach MN. An Excess of the Proinflammatory Cytokines IFN-γ and IL-12 Impairs the Development of the Memory CD8+ T Cell Response to Chlamydia trachomatis. THE JOURNAL OF IMMUNOLOGY 2015; 195:1665-75. [PMID: 26179901 DOI: 10.4049/jimmunol.1500457] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 06/12/2015] [Indexed: 12/13/2022]
Abstract
The obligate intracellular bacterium Chlamydia trachomatis is the most common cause of bacterial sexually transmitted disease in the United States and the leading cause of preventable blindness worldwide. Transfer of cultured Chlamydia-specific CD8(+) T cells or vaccination with recombinant virus expressing an MHC I-restricted Chlamydia Ag confers protection, yet surprisingly a protective CD8(+) T cell response is not stimulated following natural infection. In this study, we demonstrate that the presence of excess IL-12 and IFN-γ contributes to poor memory CD8(+) T cell development during C. trachomatis infection of mice. IL-12 is required for CD8(+) T cell expansion but drives effector CD8(+) T cells into a short-lived fate, whereas IFN-γ signaling impairs the development of effector memory cells. We show that transient blockade of IL-12 and IFN-γ during priming promotes the development of memory precursor effector CD8(+) T cells and increases the number of memory T cells that participate in the recall protection against subsequent infection. Overall, this study identifies key factors shaping memory development of Chlamydia-specific CD8(+) T cells that will inform future vaccine development against this and other pathogens.
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Affiliation(s)
- Xuqing Zhang
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA 02115
| | - Michael N Starnbach
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA 02115
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16
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Zhou GF, Liu QT, Zhou B, Qiu YF, Liu XD, Ma ZY, Feng XL, Cao RB, Chen PY. The potential molecular effects of bursal septpeptide II on immune induction and antitumor activity. J Vet Sci 2015; 16:325-31. [PMID: 25643804 PMCID: PMC4588018 DOI: 10.4142/jvs.2015.16.3.325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 01/29/2015] [Indexed: 11/30/2022] Open
Abstract
The bursa of Fabricius (BF) is the acknowledged central humoral immune organ in birds. Bursal septpeptide II (BSP-II) is an immunomodulatory bioactive peptide isolated from BF. To understand the effects of BSP-II on immune induction, gene expression profiles of hybridoma cells treated with BSP-II were evaluated. Pathway analysis showed that regulated genes were involved in cytokine-cytokine receptor interactions, T cell receptor signaling pathway, and pathway in cancer. It was observed that BSP-II reduced tumor cells proliferation and stimulated p53 expression. These results indicate potential mechanisms underlying the effects of the humoral immune system on immune induction, including antitumor activities. Our study has provided a novel insight into immunotherapeutic strategies for treating human tumors.
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Affiliation(s)
- Guang Fang Zhou
- Division of Key Lab of Animal Disease Diagnosis and Immunology of China's Department of Agriculture, College of Veterinary Medicine, Nanjing Agriculture University, Nanjing 210095, China
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17
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T cell exhaustion during persistent viral infections. Virology 2015; 479-480:180-93. [PMID: 25620767 DOI: 10.1016/j.virol.2014.12.033] [Citation(s) in RCA: 219] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 12/17/2014] [Accepted: 12/19/2014] [Indexed: 02/08/2023]
Abstract
Although robust and highly effective anti-viral T cells contribute to the clearance of many acute infections, viral persistence is associated with the development of functionally inferior, exhausted, T cell responses. Exhaustion develops in a step-wise and progressive manner, ranges in severity, and can culminate in the deletion of the anti-viral T cells. This disarming of the response is consequential as it compromises viral control and potentially serves to dampen immune-mediated damage. Exhausted T cells are unable to elaborate typical anti-viral effector functions. They are characterized by the sustained upregulation of inhibitory receptors and display a gene expression profile that distinguishes them from prototypic effector and memory T cell populations. In this review we discuss the properties of exhausted T cells; the virological and immunological conditions that favor their development; the cellular and molecular signals that sustain the exhausted state; and strategies for preventing and reversing exhaustion to favor viral control.
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18
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Hu Z, Molloy MJ, Usherwood EJ. CD4(+) T-cell dependence of primary CD8(+) T-cell response against vaccinia virus depends upon route of infection and viral dose. Cell Mol Immunol 2014; 13:82-93. [PMID: 25544501 DOI: 10.1038/cmi.2014.128] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 11/21/2014] [Accepted: 11/22/2014] [Indexed: 11/09/2022] Open
Abstract
CD4(+) T-cell help (CD4 help) plays a pivotal role in CD8(+) T-cell responses against viral infections. However, the role in primary CD8(+) T-cell responses remains controversial. We evaluated the effects of infection route and viral dose on primary CD8(+) T-cell responses to vaccinia virus (VACV) in MHC class II(-/-) mice. CD4 help deficiency diminished the generation of VACV-specific CD8(+) T cells after intraperitoneal (i.p.) but not after intranasal (i.n.) infection. A large viral dose could not restore normal expansion of VACV-specific CD8(+) T cells in i.p. infected MHC II(-/-) mice. In contrast, dependence on CD4 help was observed in i.n. infected MHC II(-/-) mice when a small viral dose was used. These data suggested that primary CD8(+) T-cell responses are less dependent on CD4 help in i.n. infection compared to i.p. infection. Activated CD8(+) T cells produced more IFN-γ, TNF-α and granzyme B in i.n. infected mice than those in i.p. infected mice, regardless of CD4 help. IL-2 signaling via CD25 was not necessary to drive expansion of VACV-specific CD8(+) T cells in i.n. infection, but it was crucial in i.p. infection. VACV-specific CD8(+) T cells underwent increased apoptosis in the absence of CD4 help, but proliferated normally and had cytotoxic potential, regardless of infection route. Our results indicate that route of infection and viral dose are two determinants for CD4 help dependence, and intranasal infection induces more potent effector CD8(+) T cells than i.p. infection.
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19
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Bassi MR, Kongsgaard M, Steffensen MA, Fenger C, Rasmussen M, Skjødt K, Finsen B, Stryhn A, Buus S, Christensen JP, Thomsen AR. CD8+ T cells complement antibodies in protecting against yellow fever virus. THE JOURNAL OF IMMUNOLOGY 2014; 194:1141-53. [PMID: 25539816 DOI: 10.4049/jimmunol.1402605] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The attenuated yellow fever (YF) vaccine (YF-17D) was developed in the 1930s, yet little is known about the protective mechanisms underlying its efficiency. In this study, we analyzed the relative contribution of cell-mediated and humoral immunity to the vaccine-induced protection in a murine model of YF-17D infection. Using different strains of knockout mice, we found that CD4(+) T cells, B cells, and Abs are required for full clinical protection of vaccinated mice, whereas CD8(+) T cells are dispensable for long-term survival after intracerebral challenge. However, by analyzing the immune response inside the infected CNS, we observed an accelerated T cell influx into the brain after intracerebral challenge of vaccinated mice, and this T cell recruitment correlated with improved virus control in the brain. Using mice deficient in B cells we found that, in the absence of Abs, YF vaccination can still induce some antiviral protection, and in vivo depletion of CD8(+) T cells from these animals revealed a pivotal role for CD8(+) T cells in controlling virus replication in the absence of a humoral response. Finally, we demonstrated that effector CD8(+) T cells also contribute to viral control in the presence of circulating YF-specific Abs. To our knowledge, this is the first time that YF-specific CD8(+) T cells have been demonstrated to possess antiviral activity in vivo.
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Affiliation(s)
- Maria R Bassi
- Department of International Health, Immunology and Microbiology, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Michael Kongsgaard
- Department of International Health, Immunology and Microbiology, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Maria A Steffensen
- Department of International Health, Immunology and Microbiology, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Christina Fenger
- Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, DK-5000 Odense, Denmark; and
| | - Michael Rasmussen
- Department of International Health, Immunology and Microbiology, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Karsten Skjødt
- Department of Cancer and Inflammation, Institute for Molecular Medicine, University of Southern Denmark, DK-5000 Odense, Denmark
| | - Bente Finsen
- Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, DK-5000 Odense, Denmark; and
| | - Anette Stryhn
- Department of International Health, Immunology and Microbiology, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Søren Buus
- Department of International Health, Immunology and Microbiology, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Jan P Christensen
- Department of International Health, Immunology and Microbiology, University of Copenhagen, DK-2200 Copenhagen N, Denmark
| | - Allan R Thomsen
- Department of International Health, Immunology and Microbiology, University of Copenhagen, DK-2200 Copenhagen N, Denmark;
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20
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CD4+ T cell help is dispensable for protective CD8+ T cell memory against mousepox virus following vaccinia virus immunization. J Virol 2014; 89:776-83. [PMID: 25355885 DOI: 10.1128/jvi.02176-14] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
UNLABELLED It has been shown in various infection models that CD4(+) T cell help (TH) is necessary for the conditioning, maintenance, and/or recall responses of memory CD8(+) T cells (CD8M). Yet, in the case of vaccinia virus (VACV), which constitutes the vaccine used to eradicate smallpox and is a candidate vector for other infectious diseases, the issue is controversial because different groups have shown either T(H) dependence or independence of CD8M conditioning, maintenance, and/or recall response. In agreement with some of these groups, we show that T(H) plays a role in, but is not essential for, the maintenance, proliferation, and effector differentiation of polyclonal memory CD8(+) T cells after infection with wild-type VACV strain Western Reserve. More important, we show that unhelped and helped anti-VACV memory CD8(+) T cells are similarly efficient at protecting susceptible mice from lethal mousepox, the mouse equivalent of human smallpox. Thus, T(H) is not essential for the conditioning and maintenance of memory CD8(+) T cells capable of mounting a recall response strong enough to protect from a lethal natural pathogen. Our results may partly explain why the VACV vaccine is so effective. IMPORTANCE We used vaccinia virus (VACV)--a gold standard vaccine--as the immunogen and ectromelia virus (ECTV) as the pathogen to demonstrate that the conditioning and maintenance of anti-VACV memory CD8(+) T cells and their ability to protect against an orthopoxvirus (OPV) infection in its natural host can develop in the absence of CD4(+) T cell help. Our results provide important insight to our basic knowledge of the immune system. Further, because VACV is used as a vaccine in humans, our results may help us understand how this vaccine induces protective immunity in this species. In addition, this work may partly explain why VACV is so effective as a vaccine.
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21
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Co-expression of tumor antigen and interleukin-2 from an adenoviral vector augments the efficiency of therapeutic tumor vaccination. Mol Ther 2014; 22:2107-2117. [PMID: 25023330 DOI: 10.1038/mt.2014.130] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Accepted: 06/22/2014] [Indexed: 12/14/2022] Open
Abstract
We have previously shown that for the majority of antigens, adenoviral vaccines expressing the target antigen fused to the MHC associated invariant chain (Ii) induce an accelerated, augmented, and prolonged transgene-specific CD8(+) T-cell response. Here we describe a new adenoviral vaccine vector approach where the target antigen fused to Ii is expressed from the adenoviral E1 region and IL-2 is expressed from the E3 region. Immunization of mice with this new vector construct resulted in an augmented primary effector CD8(+) T-cell response. Furthermore, in a melanoma model we observed significantly prolonged tumor control in vaccinated wild type (WT) mice. The improved tumor control required antigen-specific cells, since no tumor control was observed, unless the melanoma cells expressed the vaccine targeted antigen. We also tested our new vaccine in immunodeficient (CD80/86 deficient) mice. Following vaccination with the IL-2 expressing construct, these mice were able to raise a delayed but substantial CD8(+) T-cell response, and to control melanoma growth nearly as efficaciously as similarly vaccinated WT mice. Taken together, these results demonstrate that current vaccine vectors can be improved and even tailored to meet specific demands: in the context of therapeutic vaccination, the capacity to promote an augmented effector T-cell response.
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22
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Provine NM, Larocca RA, Penaloza-MacMaster P, Borducchi EN, McNally A, Parenteau LR, Kaufman DR, Barouch DH. Longitudinal requirement for CD4+ T cell help for adenovirus vector-elicited CD8+ T cell responses. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2014; 192:5214-25. [PMID: 24778441 PMCID: PMC4025612 DOI: 10.4049/jimmunol.1302806] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 03/26/2014] [Indexed: 11/19/2022]
Abstract
Despite the widespread use of replication-incompetent recombinant adenovirus (Ad) vectors as candidate vaccine platforms, the mechanism by which these vectors elicit CD8(+) T cell responses remains poorly understood. Our data demonstrate that induction and maintenance of CD8(+) T cell responses by Ad vector immunization is longitudinally dependent on CD4(+) T cell help for a prolonged period. Depletion of CD4(+) T cells in wild type mice within the first 8 d following Ad immunization resulted in dramatically reduced induction of Ag-specific CD8(+) T cells, decreased T-bet and eomesodermin expression, impaired KLRG1(+) effector differentiation, and atypical expression of the memory markers CD127, CD27, and CD62L. Moreover, these CD8(+) T cells failed to protect against a lethal recombinant Listeria monocytogenes challenge. Depletion of CD4(+) T cells between weeks 1 and 4 following immunization resulted in increased contraction of memory CD8(+) T cells. These data demonstrate a prolonged temporal requirement for CD4(+) T cell help for vaccine-elicited CD8(+) T cell responses in mice. These findings have important implications in the design of vaccines aimed at eliciting CD8(+) T cell responses and may provide insight into the impaired immunogenicity of vaccines in the context of AIDS and other CD4(+) T cell immune deficiencies.
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Affiliation(s)
- Nicholas M Provine
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA 02215; and
| | - Rafael A Larocca
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA 02215; and
| | - Pablo Penaloza-MacMaster
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA 02215; and
| | - Erica N Borducchi
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA 02215; and
| | - Anna McNally
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA 02215; and
| | - Lily R Parenteau
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA 02215; and
| | - David R Kaufman
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA 02215; and
| | - Dan H Barouch
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA 02215; and Ragon Institute of MGH, MIT and Harvard, Cambridge, MA 02139
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23
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O'Brien S, Thomas RM, Wertheim GB, Zhang F, Shen H, Wells AD. Ikaros imposes a barrier to CD8+ T cell differentiation by restricting autocrine IL-2 production. THE JOURNAL OF IMMUNOLOGY 2014; 192:5118-29. [PMID: 24778448 DOI: 10.4049/jimmunol.1301992] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Naive CD4(+) T cells require signals from the TCR and CD28 to produce IL-2, expand, and differentiate. However, these same signals are not sufficient to induce autocrine IL-2 production by naive CD8(+) T cells, which require cytokines provided by other cell types to drive their differentiation. The basis for failed autocrine IL-2 production by activated CD8(+) cells is unclear. We find that Ikaros, a transcriptional repressor that silences IL-2 in anergic CD4(+) T cells, also restricts autocrine IL-2 production by CD8(+) T cells. We find that CD8(+) T cell activation in vitro in the absence of exogenous cytokines and CD4 help leads to marked induction of Ikaros, a known repressor of the Il2 gene. Naive murine CD8 T cells haplo-insufficient for Ikzf1 failed to upregulate Ikaros, produced autocrine IL-2, and differentiated in an IL-2-dependent manner into IFN-γ-producing CTLs in response to TCR/CD28 stimulation alone. Furthermore, Ikzf1 haplo-insufficient CD8(+) T cells were more effective at controlling Listeria infection and B16 melanoma growth in vivo, and they could provide help to neighboring, non-IL-2-producing cells to differentiate into IFN-γ-producing effectors. Therefore, by repressing autocrine IL-2 production, Ikaros ensures that naive CD8(+) T cells remain dependent on licensing by APCs and CD4(+) T cells, and it may therefore act as a cell-intrinsic safeguard against inappropriate CTL differentiation and immunopathology.
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Affiliation(s)
- Shaun O'Brien
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Rajan M Thomas
- Children's Hospital of Philadelphia Research Institute, Philadelphia, PA 19104; and
| | - Gerald B Wertheim
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Children's Hospital of Philadelphia Research Institute, Philadelphia, PA 19104; and
| | - Fuqin Zhang
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Hao Shen
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Andrew D Wells
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Children's Hospital of Philadelphia Research Institute, Philadelphia, PA 19104; and
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Bedenikovic G, Crouse J, Oxenius A. T-cell help dependence of memory CD8+T-cell expansion upon vaccinia virus challenge relies on CD40 signaling. Eur J Immunol 2013; 44:115-26. [DOI: 10.1002/eji.201343805] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 08/19/2013] [Accepted: 09/18/2013] [Indexed: 11/09/2022]
Affiliation(s)
| | - Josh Crouse
- Institute of Microbiology; ETH Zürich; Zürich Switzerland
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25
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Umeshappa CS, Nanjundappa RH, Xie Y, Freywald A, Xu Q, Xiang J. Differential requirements of CD4(+) T-cell signals for effector cytotoxic T-lymphocyte (CTL) priming and functional memory CTL development at higher CD8(+) T-cell precursor frequency. Immunology 2013; 138:298-306. [PMID: 23113741 DOI: 10.1111/imm.12033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 10/18/2012] [Accepted: 10/22/2012] [Indexed: 02/02/2023] Open
Abstract
Increased CD8(+) T-cell precursor frequency (PF) precludes the requirement of CD4(+) helper T (Th) cells for primary CD8(+) cytotoxic T-lymphocyte (CTL) responses. However, the key questions of whether unhelped CTLs generated at higher PF are functional effectors, and whether unhelped CTLs can differentiate into functional memory cells at higher PF are unclear. In this study, ovalbumin (OVA) -pulsed dendritic cells (DC(OVA)) derived from C57BL/6, CD40 knockout (CD40(-/-)) or CD40 ligand knockout (CD40L(-/-)) mice were used to immunize C57BL/6, Ia(b-/-), CD40(-/-) or CD40L(-/-) mice, whose PF was previously increased with transfer of 1 × 10(6) CD8(+) T cells derived from OVA-specific T-cell receptor (TCR) transgenic OTI, OTI(CD40(-/-)) or OTI(CD40L(-/-)) mice. All the immunized mice were then assessed for effector and memory CTL responses. Following DC immunization, relatively comparable CTL priming occurred without CD4(+) T-cell help and Th-provided CD40/CD40L signalling. In addition, the unhelped CTLs were functional effectors capable of inducing therapeutic immunity against established OVA-expressing tumours. In contrast, the functional memory development of CTLs was severely impaired in the absence of CD4(+) T-cell help and CD40/CD40L signalling. Finally, unhelped memory CTLs failed to protect mice against lethal tumour challenge. Taken together, these results demonstrate that CD4(+) T-cell help at higher PF, is not required for effector CTL priming, but is required for functional memory CTL development against cancer. Our data may impact the development of novel preventive and therapeutic approaches in cancer patients with compromised CD4(+) T-cell functions.
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Affiliation(s)
- Channakeshava S Umeshappa
- Cancer Research Unit, Department of Oncology, Saskatchewan Cancer Agency, University of Saskatchewan, Saskatoon, SK, Canada
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26
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CD154 and IL-2 signaling of CD4+ T cells play a critical role in multiple phases of CD8+ CTL responses following adenovirus vaccination. PLoS One 2012; 7:e47004. [PMID: 23071696 PMCID: PMC3465321 DOI: 10.1371/journal.pone.0047004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Accepted: 09/10/2012] [Indexed: 01/22/2023] Open
Abstract
Adenoviral (AdV) vectors represent most commonly utilized viral vaccines in clinical studies. While the role of CD8+ cytotoxic T lymphocyte (CTL) responses in mediating AdV-induced protection is well understood, the involvement of CD4+ T cell-provided signals in the development of functional CD8+ CTL responses remain unclear. To explore CD4+ T helper signals required for AdVova-stimulated CTL responses, we established an adoptive transfer system by transferring CD4+ T cells derived from various knock out and transgenic mice into wild-type and/or CD4-deficient animals, followed by immunizing with recombinant ovalbumin (OVA)-expressing AdVova vector. Without CD4+ T help, both primary and memory CTL responses were greatly reduced in this model, and were associated with increased PD-1 expression. The provision of OVA-specific CD4+ T help in CD4+ T cell-deficient mice restored AdVova-induced primary CTL responses, and supported survival and recall responses of AdVova-stimulated memory CTLs. These effects were specifically mediated by CD4+ T cell-produced IL-2 and CD154 signals. Adoptive transfer of “helped” or “unhelped” effector and memory CTLs into naïve CD4+ T cell-deficient or -sufficient mice also revealed an additional role for polyclonal CD4+ T cell environment in the survival of AdVova-stimulated CTLs, partially explaining the extension of CTL contraction phase. Finally, during recall responses, CD4+ T cell environment, particularly involving memory CD4+ T cells, greatly enhanced expansion of memory CTLs. Collectively, our data strongly suggest a critical role for CD4+ T help in multiple phases of AdV-stimulated CTL responses, and could partially explain certain failures in AdV-based immunization trials targeting malignant tumors and chronic diseases that are often associated with compromised CD4+ T cell population and function.
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27
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Mekker A, Tchang VS, Haeberli L, Oxenius A, Trkola A, Karrer U. Immune senescence: relative contributions of age and cytomegalovirus infection. PLoS Pathog 2012; 8:e1002850. [PMID: 22916013 PMCID: PMC3420944 DOI: 10.1371/journal.ppat.1002850] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Accepted: 06/15/2012] [Indexed: 01/11/2023] Open
Abstract
Immune senescence, defined as the age-associated dysregulation and dysfunction of the immune system, is characterised by impaired protective immunity and decreased efficacy of vaccines. Recent clinical, epidemiological and immunological studies suggest that Cytomegalovirus (CMV) infection may be associated with accelerated immune senescence, possibly by restricting the naïve T cell repertoire. However, direct evidence whether and how CMV-infection is implicated in immune senescence is still lacking. In this study, we have investigated whether latent mouse CMV (MCMV) infection with or without thymectomy (Tx) alters antiviral immunity of young and aged mice. After infection with lymphocytic choriomeningitis virus (LCMV) or Vaccinia virus, specific antiviral T cell responses were significantly reduced in old, old MCMV-infected and/or Tx mice compared to young mice. Importantly, control of LCMV replication was more profoundly impaired in aged MCMV-infected mice compared to age-matched MCMV-naïve or young mice. In addition, latent MCMV infection was associated with slightly reduced vaccination efficacy in old Tx mice. In contrast to the prevailing hypothesis of a CMV-mediated restriction of the naïve T cell repertoire, we found similar naïve T cell numbers in MCMV-infected and non-infected mice, whereas ageing and Tx clearly reduced the naïve T cell pool. Instead, MCMV-infection expanded the total CD8+ T cell pool by a massive accumulation of effector memory T cells. Based on these results, we propose a new model of increased competition between CMV-specific memory T cells and any ‘de novo’ immune response in aged individuals. In summary, our results directly demonstrate in a mouse model that latent CMV-infection impairs immunity in old age and propagates immune senescence. Cytomegalovirus (CMV) persistently infects 50–90% of the human population. After primary infection, constant immune surveillance is required to prevent CMV-related disease. During ageing, increasing T cell resources are expended to keep CMV under control. Recent human studies have suggested that this investment may come at the cost of accelerated immune senescence, a condition describing the age-associated decline of the immune system's functionality. In the present study, we have developed a mouse model to directly investigate whether and how CMV-infection might impair immunity of aged individuals. We demonstrate that old mice with long-lasting CMV-infection are more susceptible to viral infections than old mice without CMV since their virus specific T cell response is suppressed. Contrary to the prevailing hypothesis we found no indication for a CMV-associated shrinking of the naïve T cell compartment. Instead, CMV-infection precipitated a massive expansion of memory T cells. Thus, we propose an alternative mechanism of CMV-enhanced immune senescence based on T cell competition between CMV-specific memory T cells and de novo generated T cell responses. In summary, we provide the first direct evidence that CMV-infection is indeed a propagating factor for poor immunity in the elderly.
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Affiliation(s)
- Andrea Mekker
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, Zurich, Switzerland
- Molecular Life Science Graduate School, University of Zurich, Zurich, Switzerland
| | - Vincent S. Tchang
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, Zurich, Switzerland
| | - Lea Haeberli
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, Zurich, Switzerland
| | - Annette Oxenius
- Institute of Microbiology, Swiss Federal Institute of Technology (ETH) Zurich, HCI 4, Zurich, Switzerland
| | - Alexandra Trkola
- Institute of Medical Virology, University of Zurich, Zurich, Switzerland
| | - Urs Karrer
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, Zurich, Switzerland
- * E-mail:
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28
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Signal 3 cytokines as modulators of primary immune responses during infections: the interplay of type I IFN and IL-12 in CD8 T cell responses. PLoS One 2012; 7:e40865. [PMID: 22815848 PMCID: PMC3398954 DOI: 10.1371/journal.pone.0040865] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Accepted: 06/18/2012] [Indexed: 12/04/2022] Open
Abstract
Signal 3 cytokines, such as IL-12 or type I IFN, support expansion and differentiation of CD8 T cells in vivo. If and how these two signal 3 cytokines compensate each other in T cell activation during different infections is so far unknown. Using CD8 T cells lacking receptors for IL-12, type I IFN or both, we show that the expansion of CD8 T cells depends on type I IFN (LCMV infection), type I IFN and IL-12 (Listeria and vesicular stomatitis virus infection) or is largely independent of the two cytokines (vaccinia virus infection). Furthermore, we show that CD8 T cells lacking IL-12 and type I IFN signals are impaired in cytokine production and cytolytic activity in the context of VSV and Listeria infection. These effector CD8 T cells fail to express KLRG1, thereby exhibiting a memory-like phenotype which correlated with lower expression of the transcription factor T-bet and higher expression of Eomes. This indicates that the variable interplay of both signal 3 cytokines is mandatory for cell fate decision of CD8 T cells in the context of different infections. Furthermore our results demonstrate that the pathogen-induced overall inflammatory milieu and not the antigen load and/or the quality of antigen presentation critically determine the signal 3 dependence of CD8 T cells.
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29
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Wiesel M, Oxenius A. From crucial to negligible: functional CD8⁺ T-cell responses and their dependence on CD4⁺ T-cell help. Eur J Immunol 2012; 42:1080-8. [PMID: 22539281 DOI: 10.1002/eji.201142205] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
CD8(+) T cells play an important role in controlling pathogenic infections and are therefore key players in the immune response. It has been shown that among other factors CD4(+) T cells can shape the magnitude as well as the quality of primary and/or secondary CD8(+) T-cell responses. However, due to the complexity and the differences among diverse immunization or infection models, the overall requirement, the time points, as well as the specific mechanism(s) of CD4(+) T-cell help may differ substantially. Here, we summarize current knowledge about the differential requirement of CD4(+) T-cell help in promoting primary CD8(+) T-cell responses as well as establishing functional memory CD8(+) T cells in various experimental settings.
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Affiliation(s)
- Melanie Wiesel
- Institute for Microbiology, ETH Zürich, Zürich, Switzerland
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30
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Wiesel M, Crouse J, Bedenikovic G, Sutherland A, Joller N, Oxenius A. Type-I IFN drives the differentiation of short-lived effector CD8+T cells in vivo. Eur J Immunol 2011; 42:320-9. [DOI: 10.1002/eji.201142091] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Revised: 10/17/2011] [Accepted: 11/09/2011] [Indexed: 12/14/2022]
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31
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Obar JJ, Jellison ER, Sheridan BS, Blair DA, Pham QM, Zickovich JM, Lefrançois L. Pathogen-induced inflammatory environment controls effector and memory CD8+ T cell differentiation. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2011; 187:4967-78. [PMID: 21987662 PMCID: PMC3208080 DOI: 10.4049/jimmunol.1102335] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In response to infection, CD8(+) T cells integrate multiple signals and undergo an exponential increase in cell numbers. Simultaneously, a dynamic differentiation process occurs, resulting in the formation of short-lived effector cells (SLECs; CD127(low)KLRG1(high)) and memory precursor effector cells (CD127(high)KLRG1(low)) from an early effector cell that is CD127(low)KLRG1(low) in phenotype. CD8(+) T cell differentiation during vesicular stomatitis virus infection differed significantly than during Listeria monocytogenes infection with a substantial reduction in early effector cell differentiation into SLECs. SLEC generation was dependent on Ebi3 expression. Furthermore, SLEC differentiation during vesicular stomatitis virus infection was enhanced by administration of CpG-DNA, through an IL-12-dependent mechanism. Moreover, CpG-DNA treatment enhanced effector CD8(+) T cell functionality and memory subset distribution, but in an IL-12-independent manner. Population dynamics were dramatically different during secondary CD8(+) T cell responses, with a much greater accumulation of SLECs and the appearance of a significant number of CD127(high)KLRG1(high) memory cells, both of which were intrinsic to the memory CD8(+) T cell. These subsets persisted for several months but were less effective in recall than memory precursor effector cells. Thus, our data shed light on how varying the context of T cell priming alters downstream effector and memory CD8(+) T cell differentiation.
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Affiliation(s)
- Joshua J. Obar
- Department of Immunology, Center for Integrated Immunology and Vaccine Research,University of Connecticut Health Center, 263 Farmington Avenue, Farmington CT 06030
- Department of Immunology & Infectious Diseases, Montana State University, 960 Technology Boulevard, Bozeman MT 59718
| | - Evan R. Jellison
- Department of Immunology, Center for Integrated Immunology and Vaccine Research,University of Connecticut Health Center, 263 Farmington Avenue, Farmington CT 06030
| | - Brian S. Sheridan
- Department of Immunology, Center for Integrated Immunology and Vaccine Research,University of Connecticut Health Center, 263 Farmington Avenue, Farmington CT 06030
| | - David A. Blair
- Department of Immunology, Center for Integrated Immunology and Vaccine Research,University of Connecticut Health Center, 263 Farmington Avenue, Farmington CT 06030
| | - Quynh-Mai Pham
- Department of Immunology, Center for Integrated Immunology and Vaccine Research,University of Connecticut Health Center, 263 Farmington Avenue, Farmington CT 06030
| | - Julianne M. Zickovich
- Department of Immunology & Infectious Diseases, Montana State University, 960 Technology Boulevard, Bozeman MT 59718
| | - Leo Lefrançois
- Department of Immunology, Center for Integrated Immunology and Vaccine Research,University of Connecticut Health Center, 263 Farmington Avenue, Farmington CT 06030
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32
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Wolkers MC, Bensinger SJ, Green DR, Schoenberger SP, Janssen EM. Interleukin-2 rescues helpless effector CD8+ T cells by diminishing the susceptibility to TRAIL mediated death. Immunol Lett 2011; 139:25-32. [PMID: 21621553 DOI: 10.1016/j.imlet.2011.04.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Revised: 04/21/2011] [Accepted: 04/21/2011] [Indexed: 11/28/2022]
Abstract
CD8(+) T cells primed in the absence of CD4(+) T cell help are programmed to produce TRAIL, which results in Death receptor (DR5) mediated apoptosis upon restimulation. Here, we studied whether these 'helpless' effector CD8(+) T cells are consigned to an apoptotic fate or whether their helpless program can be altered by inflammatory or growth cytokines. We found that helpless CD8(+) T cells regained their full proliferative and functional capacity only when IL-2 was added to cell cultures, while IL-7 and IL-15, two common gamma chain cytokines associated with CD8(+) T cell homeostasis and memory, could only partly restore secondary expansion in helpless CD8(+) T cells. Recovery of functional CD8(+) T cell immunity by IL-2 was concomitant with induction of IL2Rα (CD25) expression, downregulation of TRAIL, and the upregulation of anti-apoptotic molecules Bcl-2 and FLIP. The addition of IL-2 to helpless CD8(+) T cells also interfered with DR5-mediated apoptosis induction, indicating that IL-2 affects several components of the TRAIL-DR5 pathway. Collectively, these data demonstrate that the helpless phenotype is not fixed, and that IL-2R signaling at the time of reactivation can play an important role in restoring CD8(+) T cell function.
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Affiliation(s)
- Monika C Wolkers
- Department of Cellular Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA.
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Wiesel M, Kratky W, Oxenius A. Type I IFN Substitutes for T Cell Help during Viral Infections. THE JOURNAL OF IMMUNOLOGY 2010; 186:754-63. [DOI: 10.4049/jimmunol.1003166] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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