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van der Heide V, Homann D. CD28 days later: Resurrecting costimulation for CD8(+) memory T cells. Eur J Immunol 2017; 46:1587-91. [PMID: 27401871 DOI: 10.1002/eji.201646500] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 05/23/2016] [Accepted: 05/25/2016] [Indexed: 12/25/2022]
Abstract
Rapid activation and proliferative expansion of specific CD8(+) memory T (CD8(+) TM ) cells upon antigen re-encounter is a critical component of the adaptive immune response that confers enhanced immune protection. In this context, however, the requirements for costimulation in general, and CD28 signaling in particular, remain incompletely defined. In the current issue of the European Journal of Immunology, Fröhlich et al. [Eur. J. Immunol. 2016. 46: 1644-1655] provide definitive evidence that optimal elaboration of CD8(+) TM -cell recall responses is indeed contingent on CD28 expressed by these cells. Here, we discuss the "CD28 costimulation paradigm" in its historical context and highlight some of the unresolved complexities pertaining to CD28-dependent interactions that shape CD8(+) T-cell phenotypes, functionalities, and recall reactivity.
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Affiliation(s)
- Verena van der Heide
- Diabetes, Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Dirk Homann
- Diabetes, Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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52
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Light Guided In-vivo Activation of Innate Immune Cells with Photocaged TLR 2/6 Agonist. Sci Rep 2017; 7:8074. [PMID: 28808328 PMCID: PMC5556111 DOI: 10.1038/s41598-017-08520-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 07/10/2017] [Indexed: 11/09/2022] Open
Abstract
The complexity of the immune system creates challenges in exploring its importance and robustness. To date, there have been few techniques developed to manipulate individual components of the immune system in an in vivo environment. Here we show a light-based dendritic cell (DC) activation allowing spatial and temporal control of immune activation in vivo. Additionally, we show time dependent changes in RNA profiles of the draining lymph node, suggesting a change in cell profile following DC migration and indicating that the cells migrating have been activated towards antigen presentation.
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53
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Borrow P, Moody MA. Immunologic characteristics of HIV-infected individuals who make broadly neutralizing antibodies. Immunol Rev 2017; 275:62-78. [PMID: 28133804 PMCID: PMC5299500 DOI: 10.1111/imr.12504] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Induction of broadly neutralizing antibodies (bnAbs) capable of inhibiting infection with diverse variants of human immunodeficiency virus type 1 (HIV‐1) is a key, as‐yet‐unachieved goal of prophylactic HIV‐1 vaccine strategies. However, some HIV‐infected individuals develop bnAbs after approximately 2‐4 years of infection, enabling analysis of features of these antibodies and the immunological environment that enables their induction. Distinct subsets of CD4+ T cells play opposing roles in the regulation of humoral responses: T follicular helper (Tfh) cells support germinal center formation and provide help for affinity maturation and the development of memory B cells and plasma cells, while regulatory CD4+ (Treg) cells including T follicular regulatory (Tfr) cells inhibit the germinal center reaction to limit autoantibody production. BnAbs exhibit high somatic mutation frequencies, long third heavy‐chain complementarity determining regions, and/or autoreactivity, suggesting that bnAb generation is likely to be highly dependent on the activity of CD4+ Tfh cells, and may be constrained by host tolerance controls. This review discusses what is known about the immunological environment during HIV‐1 infection, in particular alterations in CD4+ Tfh, Treg, and Tfr populations and autoantibody generation, and how this is related to bnAb development, and considers the implications for HIV‐1 vaccine design.
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Affiliation(s)
- Persephone Borrow
- Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - M Anthony Moody
- Duke University Human Vaccine Institute and Departments of Pediatrics and Immunology, Duke University School of Medicine, Durham, NC, USA
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54
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Watanabe M, Fujihara C, Radtke AJ, Chiang YJ, Bhatia S, Germain RN, Hodes RJ. Co-stimulatory function in primary germinal center responses: CD40 and B7 are required on distinct antigen-presenting cells. J Exp Med 2017; 214:2795-2810. [PMID: 28768709 PMCID: PMC5584122 DOI: 10.1084/jem.20161955] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 05/23/2017] [Accepted: 06/23/2017] [Indexed: 01/28/2023] Open
Abstract
Watanabe et al. report that, contrary to the prevailing paradigm, there are unique cellular requirements for B7 and CD40 expression in primary GC responses. B7 is required on DCs but not on B cells, whereas CD40 is required on B cells but not on DCs for generation of Tfh cells, GC B cells, and high-affinity class-switched antibody production. T cell–dependent germinal center (GC) responses require coordinated interactions of T cells with two antigen-presenting cell (APC) populations, B cells and dendritic cells (DCs), in the presence of B7- and CD40-dependent co-stimulatory pathways. Contrary to the prevailing paradigm, we found unique cellular requirements for B7 and CD40 expression in primary GC responses to vaccine immunization with protein antigen and adjuvant: B7 was required on DCs but was not required on B cells, whereas CD40 was required on B cells but not on DCs in the generation of antigen-specific follicular helper T cells, antigen-specific GC B cells, and high-affinity class-switched antibody production. There was, in fact, no requirement for coexpression of B7 and CD40 on the same cell in these responses. Our findings support a substantially revised model for co-stimulatory function in the primary GC response, with crucial and distinct contributions of B7- and CD40-dependent pathways expressed by different APC populations and with important implications for understanding how to optimize vaccine responses or limit autoimmunity.
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Affiliation(s)
- Masashi Watanabe
- Experimental Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Chiharu Fujihara
- Experimental Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Andrea J Radtke
- Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Y Jeffrey Chiang
- Experimental Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Sumeena Bhatia
- Experimental Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Ronald N Germain
- Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Richard J Hodes
- Experimental Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD
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Abstract
T follicular helper (Tfh) cells are a distinct type of CD4+ T cell specialized in providing help to B cells during the germinal centre (GC) reaction. As such, they are critical determinants of the quality of an antibody response following antigen challenge. Excessive production of Tfh cells can result in autoimmunity whereas too few can result in inadequate protection from infection. Hence, their differentiation and maintenance must be tightly regulated to ensure appropriate but limited help to B cells. Unlike the majority of other CD4+ T-cell subsets, Tfh cell differentiation occurs in three phases defined by their anatomical location. During each phase of differentiation the emerging Tfh cells express distinct patterns of co-receptors, which work together with the T-cell receptor (TCR) to drive Tfh differentiation. These signals provided by both TCR and co-receptors during Tfh differentiation alter proliferation, survival, metabolism, cytokine production and transcription factor expression. This review will discuss how engagement of TCR and co-receptors work together to shape the formation and function of Tfh cells.
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Affiliation(s)
- Louise M C Webb
- Laboratory of Lymphocyte Signalling and Development, Babraham Institute, Cambridge, UK
| | - Michelle A Linterman
- Laboratory of Lymphocyte Signalling and Development, Babraham Institute, Cambridge, UK
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56
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The strength of BCR signaling shapes terminal development of follicular helper T cells in mice. Eur J Immunol 2017; 47:1295-1304. [DOI: 10.1002/eji.201746952] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 04/14/2017] [Accepted: 06/06/2017] [Indexed: 12/20/2022]
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57
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Jogdand GM, Mohanty S, Devadas S. Regulators of Tfh Cell Differentiation. Front Immunol 2016; 7:520. [PMID: 27933060 PMCID: PMC5120123 DOI: 10.3389/fimmu.2016.00520] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 11/08/2016] [Indexed: 12/14/2022] Open
Abstract
The follicular helper T (Tfh) cells help is critical for activation of B cells, antibody class switching, and germinal center (GC) formation. The Tfh cells are characterized by the expression of CXC chemokine receptor 5 (CXCR5), ICOS, programed death 1 (PD-1), B cell lymphoma 6 (BCL-6), and IL-21. They are involved in clearing infections and are adversely linked with autoimmune diseases and also have a role in viral replication as well as clearance. On the one hand, Tfh cells are generated from naive CD4+ T cells with sequential steps involving cytokine signaling (IL-21, IL-6, IL-12, activin A), migration, and positioning in the GC by CXCR5, surface receptors (ICOS/ICOSL, signaling lymphocyte activation molecule-associated protein/signaling lymphocyte activation molecule) as well as transcription factor (BCL-6, c-Maf, and signal transducer and activator of transcription 3) signaling and repressor miR155. On the other hand, Tfh generation is negatively regulated at specific steps of Tfh generation by specific cytokine (IL-2, IL-7), surface receptor (PD-1, CTLA-4), transcription factors B lymphocyte maturation protein 1, signal transducer and activator of transcription 5, T-bet, KLF-2 signaling, and repressor miR 146a. Interestingly, miR-17-92 and FOXO1 act as a positive as well as a negative regulator of Tfh differentiation depending on the time of expression and disease specificity. Tfh cells are also generated from the conversion of other effector T cells as exemplified by Th1 cells converting into Tfh during viral infection. The mechanistic details of effector T cells conversion into Tfh are yet to be clear. To manipulate Tfh cells for therapeutic implication and or for effective vaccination strategies, it is important to know positive and negative regulators of Tfh generation. Hence, in this review, we have highlighted and interlinked molecular signaling from cytokines, surface receptors, transcription factors, ubiquitin ligase, and microRNA as positive and negative regulators for Tfh differentiation.
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Affiliation(s)
- Gajendra M Jogdand
- T Cell and Immune Response, Infectious Disease Biology, Institute of Life Sciences , Bhubaneswar , India
| | - Suchitra Mohanty
- Tumor Virology Lab, Infectious Disease Biology, Institute of Life Sciences , Bhubaneswar , India
| | - Satish Devadas
- T Cell and Immune Response, Infectious Disease Biology, Institute of Life Sciences , Bhubaneswar , India
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58
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Affiliation(s)
- Carola G. Vinuesa
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, ACT 2601, Australia;
| | - Michelle A. Linterman
- Lymphocyte Signalling and Development Institute Strategic Programme, Babraham Institute, Cambridge CB22 3AT, United Kingdom;
| | - Di Yu
- Laboratory for Molecular Immunomodulation, Department of Biochemistry and Molecular Biology, and Center for Inflammatory Diseases, Monash University, Melbourne, Victoria 3800, Australia;
| | - Ian C.M. MacLennan
- School of Immunity and Infection, University of Birmingham, Birmingham B15 2TT, United Kingdom
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59
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A TRAF-like motif of the inducible costimulator ICOS controls development of germinal center TFH cells via the kinase TBK1. Nat Immunol 2016; 17:825-33. [PMID: 27135603 PMCID: PMC4915981 DOI: 10.1038/ni.3463] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 03/31/2016] [Indexed: 12/15/2022]
Abstract
Inducible costimulator (ICOS) signaling fuels the stepwise development of T follicular helper (TFH) cells. However, a signaling pathway unique to ICOS has not been identified. We show that TANK-binding kinase 1 (TBK1) associates with ICOS via a conserved motif, IProx, which shares homology with tumor necrosis factor receptor (TNFR)-associated factors, TRAF2 and TRAF3. Disruption of this motif abolishes the association with TBK1, thus identifying a TBK1-binding consensus. Mutation of this motif in ICOS, or depletion of TBK1 in T cells severely impaired the differentiation of germinal center (GC) TFH, B cell and antibody responses, but was dispensable for early TFH differentiation. These results reveal a novel ICOS-TBK1 signaling pathway that specifies GC TFH cell commitment.
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60
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Affiliation(s)
- Peter T. Sage
- Department of Microbiology and Immunobiology; Harvard Medical School; Boston MA USA
- Evergrande Center for Immunologic Diseases; Harvard Medical School and Brigham and Women's Hospital; Boston MA USA
| | - Arlene H. Sharpe
- Department of Microbiology and Immunobiology; Harvard Medical School; Boston MA USA
- Evergrande Center for Immunologic Diseases; Harvard Medical School and Brigham and Women's Hospital; Boston MA USA
- Department of Pathology; Brigham and Women's Hospital; Boston MA USA
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61
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Devarajan P, Bautista B, Vong AM, McKinstry KK, Strutt TM, Swain SL. New Insights into the Generation of CD4 Memory May Shape Future Vaccine Strategies for Influenza. Front Immunol 2016; 7:136. [PMID: 27148257 PMCID: PMC4827017 DOI: 10.3389/fimmu.2016.00136] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 03/28/2016] [Indexed: 12/18/2022] Open
Abstract
Influenza viral evolution presents a formidable challenge to vaccination due to the virus' ability to rapidly mutate to evade immune responses. Live influenza infections generate large and diverse CD4 effector T cell responses that yield highly protective, long-lasting CD4 T cell memory that can target conserved viral epitopes. We review advances in our understanding of mechanisms involved in generating CD4 T cell responses against the influenza A virus (IAV), focusing on specialized follicular helper (TFH) and CD4 cytotoxic (ThCTL) effector subsets and on CD4 T cell memory. We also discuss two recent findings in context of enhancing vaccine responses. First, helper T cells require priming with APC secreting high levels of IL-6. Second, the transition of IAV-generated effectors to memory depends on IL-2, costimulation and antigen signals, just before effectors reach peak numbers, defined as the "memory checkpoint." The need for these signals during the checkpoint could explain why many current influenza vaccines are poorly effective and elicit poor cellular immunity. We suggest that CD4 memory generation can be enhanced by re-vaccinating at this time. Our best hope lies in a universal vaccine that will not need to be formulated yearly against seasonal antigenically novel influenza strains and will also be protective against a pandemic strain. We suggest a vaccine approach that elicits a powerful T cell response, by initially inducing high levels of APC activation and later providing antigen at the memory checkpoint, may take us a step closer to such a universal influenza vaccine.
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Affiliation(s)
| | - Bianca Bautista
- Department of Pathology, University of Massachusetts Medical School , Worcester, MA , USA
| | - Allen M Vong
- Department of Pathology, University of Massachusetts Medical School , Worcester, MA , USA
| | - Karl Kai McKinstry
- Department of Pathology, University of Massachusetts Medical School , Worcester, MA , USA
| | - Tara M Strutt
- Department of Pathology, University of Massachusetts Medical School , Worcester, MA , USA
| | - Susan L Swain
- Department of Pathology, University of Massachusetts Medical School , Worcester, MA , USA
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62
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Abstract
The success of most vaccines relies on the generation of antibodies to provide protection against subsequent infection; this in turn depends on a robust germinal centre (GC) response that culminates in the production of long-lived antibody-secreting plasma cells. The size and quality of the GC response are directed by a specialised subset of CD4
+ T cells: T follicular helper (Tfh) cells. Tfh cells provide growth and differentiation signals to GC B cells and mediate positive selection of high-affinity B cell clones in the GC, thereby determining which B cells exit the GC as plasma cells and memory B cells. Because of their central role in the production of long-lasting humoral immunity, Tfh cells represent an interesting target for rational vaccine design.
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Affiliation(s)
- Michelle A Linterman
- Laboratory of Lymphocyte Signalling and Development, Babraham Institute, Cambridge, CB22 3AT, UK
| | - Danika L Hill
- Laboratory of Lymphocyte Signalling and Development, Babraham Institute, Cambridge, CB22 3AT, UK
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63
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Colineau L, Rouers A, Yamamoto T, Xu Y, Urrutia A, Pham HP, Cardinaud S, Samri A, Dorgham K, Coulon PG, Cheynier R, Hosmalin A, Oksenhendler E, Six A, Kelleher AD, Zaunders J, Koup RA, Autran B, Moris A, Graff-Dubois S. HIV-Infected Spleens Present Altered Follicular Helper T Cell (Tfh) Subsets and Skewed B Cell Maturation. PLoS One 2015; 10:e0140978. [PMID: 26501424 PMCID: PMC4621058 DOI: 10.1371/journal.pone.0140978] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 09/16/2015] [Indexed: 12/27/2022] Open
Abstract
Follicular helper T (Tfh) cells within secondary lymphoid organs control multiple steps of B cell maturation and antibody (Ab) production. HIV-1 infection is associated with an altered B cell differentiation and Tfh isolated from lymph nodes of HIV-infected (HIV+) individuals provide inadequate B cell help in vitro. However, the mechanisms underlying this impairment of Tfh function are not fully defined. Using a unique collection of splenocytes, we compared the frequency, phenotype and transcriptome of Tfh subsets in spleens from HIV negative (HIV-) and HIV+ subjects. We observed an increase of CXCR5+PD-1highCD57-Tfh and germinal center (GC) CD57+ Tfh in HIV+ spleens. Both subsets showed a reduced mRNA expression of the transcription factor STAT-3, co-stimulatory, regulatory and signal transduction molecules as compared to HIV- spleens. Similarly, Foxp3 expressing follicular regulatory T (Tfr) cells were increased, suggesting sustained GC reactions in chronically HIV+ spleens. As a consequence, GC B cell populations were expanded, however, complete maturation into memory B cells was reduced in HIV+ spleens where we evidenced a compromised production of B cell-activating cytokines such as IL-4 and IL-10. Collectively our data indicate that, although Tfh proliferation and GC reactions seem to be ongoing in HIV-infected spleens, Tfh “differentiation” and expression of costimulatory molecules is skewed with a profound effect on B cell maturation.
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Affiliation(s)
- Lucie Colineau
- Sorbonne Universités, UPMC Université Paris 06, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- INSERM, U1135, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- CNRS, ERL 8255, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
| | - Angeline Rouers
- Sorbonne Universités, UPMC Université Paris 06, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- INSERM, U1135, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- CNRS, ERL 8255, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
| | - Takuya Yamamoto
- Immunology Laboratory, Vaccine research center, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, Maryland, United States of America
| | - Yin Xu
- The Kirby Institute for Infection and Immunity in Society, University of New South Wales, Sydney, Australia
| | - Alejandra Urrutia
- Sorbonne Universités, UPMC Université Paris 06, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- INSERM, U1135, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- CNRS, ERL 8255, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
| | - Hang-Phuong Pham
- Sorbonne Universités UPMC Université Paris 06, UMRS 959, Immunology-Immunopathology-Immunotherapy (I3), Paris, France
- INSERM, UMRS 959, Immunology-Immunopathology-Immunotherapy (I3), Paris, France
- CNRS, FRE3632, Immunology-Immunopathology-Immunotherapy (I3), Paris, France
| | - Sylvain Cardinaud
- Sorbonne Universités, UPMC Université Paris 06, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- INSERM, U1135, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- CNRS, ERL 8255, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
| | - Assia Samri
- Sorbonne Universités, UPMC Université Paris 06, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- INSERM, U1135, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- AP-HP, Hôpital Pitié-Salpêtière, Department of Immunology, Paris, France
| | - Karim Dorgham
- Sorbonne Universités, UPMC Université Paris 06, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- INSERM, U1135, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- AP-HP, Hôpital Pitié-Salpêtière, Department of Immunology, Paris, France
| | - Pierre-Grégoire Coulon
- Sorbonne Universités, UPMC Université Paris 06, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- INSERM, U1135, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- CNRS, ERL 8255, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
| | - Rémi Cheynier
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Anne Hosmalin
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
- AP-HP, Hôpital Cochin, Paris, France
| | - Eric Oksenhendler
- Université Paris Diderot, Assistance Publique-Hôpitaux de Paris, Département d’Immunologie Clinique, Hôpital Saint-Louis, Paris, France
| | - Adrien Six
- Sorbonne Universités UPMC Université Paris 06, UMRS 959, Immunology-Immunopathology-Immunotherapy (I3), Paris, France
- INSERM, UMRS 959, Immunology-Immunopathology-Immunotherapy (I3), Paris, France
- CNRS, FRE3632, Immunology-Immunopathology-Immunotherapy (I3), Paris, France
| | - Anthony D. Kelleher
- The Kirby Institute for Infection and Immunity in Society, University of New South Wales, Sydney, Australia
| | - John Zaunders
- St. Vincent's Centre for Applied Medical Research, St. Vincent's Hospital, Sydney, Australia
| | - Richard A. Koup
- Immunology Laboratory, Vaccine research center, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, Maryland, United States of America
| | - Brigitte Autran
- Sorbonne Universités, UPMC Université Paris 06, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- INSERM, U1135, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- AP-HP, Hôpital Pitié-Salpêtière, Department of Immunology, Paris, France
| | - Arnaud Moris
- Sorbonne Universités, UPMC Université Paris 06, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- INSERM, U1135, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- CNRS, ERL 8255, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- AP-HP, Hôpital Pitié-Salpêtière, Department of Immunology, Paris, France
| | - Stéphanie Graff-Dubois
- Sorbonne Universités, UPMC Université Paris 06, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- INSERM, U1135, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- CNRS, ERL 8255, Center for Immunology and Microbial Infections—CIMI-Paris, Paris, France
- * E-mail:
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64
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Ville S, Poirier N, Blancho G, Vanhove B. Co-Stimulatory Blockade of the CD28/CD80-86/CTLA-4 Balance in Transplantation: Impact on Memory T Cells? Front Immunol 2015; 6:411. [PMID: 26322044 PMCID: PMC4532816 DOI: 10.3389/fimmu.2015.00411] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 07/27/2015] [Indexed: 12/30/2022] Open
Abstract
CD28 and CTLA-4 are prototypal co-stimulatory and co-inhibitory cell surface signaling molecules interacting with CD80/86, known to be critical for immune response initiation and regulation, respectively. Initial “bench-to-beside” translation, two decades ago, resulted in the development of CTLA4-Ig, a biologic that targets CD80/86 and prevents T-cell costimulation. In spite of its proven effectiveness in inhibiting allo-immune responses, particularly in murine models, clinical experience in kidney transplantation with belatacept (high-affinity CTLA4-Ig molecule) reveals a high incidence of acute, cell-mediated rejection. Originally, the etiology of belatacept-resistant graft rejection was thought to be heterologous immunity, i.e., the cross-reactivity of the pool of memory T cells from pathogen-specific immune responses with alloantigens. Recently, the standard view that memory T cells arise from effector cells after clonal contraction has been challenged by a “developmental” model, in which less differentiated memory T cells generate effector cells. This review delineates how this shift in paradigm, given the differences in co-stimulatory and co-inhibitory signal depending on the maturation stage, could profoundly affect our understanding of the CD28/CD80-86/CTLA-4 blockade and highlights the potential advantages of selectively targeting CD28, instead of CD80/86, to control post-transplant immune responses.
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Affiliation(s)
- Simon Ville
- Unité Mixte de Recherche, UMR_S 1064, Institut National de la Santé et de la Recherche Médicale , Nantes , France ; Institut de Transplantation Urologie Néphrologie (ITUN), Université de Nantes , Nantes , France
| | - Nicolas Poirier
- Unité Mixte de Recherche, UMR_S 1064, Institut National de la Santé et de la Recherche Médicale , Nantes , France ; Institut de Transplantation Urologie Néphrologie (ITUN), Université de Nantes , Nantes , France ; Effimune SAS , Nantes , France
| | - Gilles Blancho
- Unité Mixte de Recherche, UMR_S 1064, Institut National de la Santé et de la Recherche Médicale , Nantes , France ; Institut de Transplantation Urologie Néphrologie (ITUN), Université de Nantes , Nantes , France
| | - Bernard Vanhove
- Unité Mixte de Recherche, UMR_S 1064, Institut National de la Santé et de la Recherche Médicale , Nantes , France ; Institut de Transplantation Urologie Néphrologie (ITUN), Université de Nantes , Nantes , France ; Effimune SAS , Nantes , France
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65
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Walker LSK, von Herrath M. CD4 T cell differentiation in type 1 diabetes. Clin Exp Immunol 2015; 183:16-29. [PMID: 26102289 DOI: 10.1111/cei.12672] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2015] [Indexed: 12/27/2022] Open
Abstract
Susceptibility to type 1 diabetes is associated strongly with human leucocyte antigen (HLA) genes, implicating T cells in disease pathogenesis. In humans, CD8 T cells predominantly infiltrate the islets, yet their activation and propagation probably requires CD4 T cell help. CD4 T cells can select from several differentiation fates following activation, and this choice has profound consequences for their subsequent cytokine production and migratory potential. In turn, these features dictate which other immune cell types T cells interact with and influence, thereby determining downstream effector functions. Obtaining an accurate picture of the type of CD4 T cell differentiation associated with a particular immune-mediated disease therefore constitutes an important clue when planning intervention strategies. Early models of T cell differentiation focused on the dichotomy between T helper type 1 (Th1) and Th2 responses, with type 1 diabetes (T1D) being viewed mainly as a Th1-mediated pathology. However, several additional fate choices have emerged in recent years, including Th17 cells and follicular helper T cells. Here we revisit the issue of T cell differentiation in autoimmune diabetes, highlighting new evidence from both mouse models and patient samples. We assess the strengths and the weaknesses of the Th1 paradigm, review the data on interleukin (IL)-17 production in type 1 diabetes and discuss emerging evidence for the roles of IL-21 and follicular helper T cells in this disease setting. A better understanding of the phenotype of CD4 T cells in T1D will undoubtedly inform biomarker development, improve patient stratification and potentially reveal new targets for therapeutic intervention.
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Affiliation(s)
- L S K Walker
- Institute of Immunity and Transplantation, University College London Division of Infection and Immunity, Royal Free Campus, London, UK
| | - M von Herrath
- Type 1 Diabetes Center, La Jolla Institute for Allergy and Immunology, La Jolla, CA and Novo Nordisk Diabetes Research and Development Center, Seattle, WA, USA
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66
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T follicular regulatory cells in the regulation of B cell responses. Trends Immunol 2015; 36:410-8. [PMID: 26091728 DOI: 10.1016/j.it.2015.05.005] [Citation(s) in RCA: 214] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 05/12/2015] [Accepted: 05/13/2015] [Indexed: 12/13/2022]
Abstract
High affinity antibodies result from interactions between B cells and T follicular helper (Tfh) cells in germinal centers (GCs). Recent studies have identified an effector subset of T regulatory cells termed T follicular regulatory (Tfr) cells that specifically controls GC responses by suppressing Tfh and B cells. The discovery of Tfr cells has shed new light on pathways regulating humoral immunity that enable potent and specific responses to pathogens while restricting autoimmunity. Here, we review the current understanding of the cellular and molecular mechanisms underlying the differentiation and function of Tfr cells. In this context we discuss recent insights into the role of Tfh cells in disease, how this knowledge may be translated therapeutically, and important areas of further research.
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67
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Linterman MA, Denton AE. Treg cells and CTLA-4: the ball and chain of the germinal center response. Immunity 2015; 41:876-8. [PMID: 25526300 DOI: 10.1016/j.immuni.2014.12.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanism by which regulatory T cells control the germinal center response is unknown. In this issue of Immunity, Wing et al. (2014) and Sage et al. (2014) demonstrate that CTLA-4 is a critical effector molecule used by regulatory T cells to control the germinal center.
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Affiliation(s)
| | - Alice E Denton
- CRUK Cambridge Institute and Department of Medicine, University of Cambridge, Cambridge CB2 0RE, UK
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68
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Franckaert D, Dooley J, Roos E, Floess S, Huehn J, Luche H, Fehling HJ, Liston A, Linterman MA, Schlenner SM. Promiscuous Foxp3-cre activity reveals a differential requirement for CD28 in Foxp3⁺ and Foxp3⁻ T cells. Immunol Cell Biol 2015; 93:417-23. [PMID: 25533288 PMCID: PMC4407013 DOI: 10.1038/icb.2014.108] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 11/03/2014] [Accepted: 11/13/2014] [Indexed: 01/07/2023]
Abstract
Costimulatory signals by CD28 are critical for thymic regulatory T-cell (Treg) development. To determine the functional relevance of CD28 for peripheral Treg post thymic selection, we crossed the widely used Forkhead box protein 3 (Foxp3)-CreYFP mice to mice bearing a conditional Cd28 allele. Treg-specific CD28 deficiency provoked a severe autoimmune syndrome as a result of a strong disadvantage in competitive fitness and proliferation of CD28-deficient Tregs. By contrast, Treg survival and lineage integrity were not affected by the lack of CD28. This data demonstrate that, even after the initial induction requirement, Treg maintain a higher dependency on CD28 signalling than conventional T cells for homeostasis. In addition, we found the Foxp3-CreYFP allele to be a hypomorph, with reduced Foxp3 protein levels. Furthermore, we report here the stochastic activity of the Foxp3-CreYFP allele in non-Tregs, sufficient to recombine some conditional alleles (including Cd28) but not others (including R26-RFP). This hypomorphism and 'leaky' expression of the Foxp3-CreYFP allele should be considered when analysing the conditionally mutated Treg.
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Affiliation(s)
- Dean Franckaert
- Autoimmune Genetics Laboratory, VIB, Leuven, Belgium
- Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - James Dooley
- Autoimmune Genetics Laboratory, VIB, Leuven, Belgium
- Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Evelyne Roos
- Autoimmune Genetics Laboratory, VIB, Leuven, Belgium
- Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Stefan Floess
- Department of Experimental Immunology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Jochen Huehn
- Department of Experimental Immunology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Herve Luche
- Centre d'Immunologie de Marseille-Luminy (CIML), UM2 Aix-Marseille Université, Marseille Cedex 9, France
- INSERM U1104, Marseille Cedex 9, France
- CNRS UMR7280, Marseille Cedex 9, France
| | | | - Adrian Liston
- Autoimmune Genetics Laboratory, VIB, Leuven, Belgium
- Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Michelle A Linterman
- Lymphocyte Signalling and Development, Babraham Institute, Babraham Research Campus, Cambridge, UK
| | - Susan M Schlenner
- Autoimmune Genetics Laboratory, VIB, Leuven, Belgium
- Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
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69
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The regulation of T follicular helper responses during infection. Curr Opin Immunol 2015; 34:68-74. [PMID: 25726751 DOI: 10.1016/j.coi.2015.02.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Revised: 02/11/2015] [Accepted: 02/11/2015] [Indexed: 01/01/2023]
Abstract
Following infection, naïve CD4 T cells can differentiate into various functionally distinct effector and memory subsets, including T follicular helper (TFH) cells that orchestrate germinal center (GC) reactions necessary for high-affinity, pathogen-specific antibody responses. The origins and function of this cell type have been extensively examined in response to subunit immunization with model antigens. More recently, we are beginning to also appreciate the extent to which microbial infections shape the generation, function and maintenance of TFH cells. Here, we review recent advances and highlight additional knowledge gaps in our understanding of how microbial infections influence priming, differentiation, localization and activity of TFH cells following acute and chronic infections.
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