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Peña-Asensio J, Calvo-Sánchez H, Miquel J, Sanz-de-Villalobos E, González-Praetorius A, Torralba M, Larrubia JR. IL-15 boosts activated HBV core-specific CD8 + progenitor cells via metabolic rebalancing in persistent HBV infection. iScience 2024; 27:108666. [PMID: 38155778 PMCID: PMC10753074 DOI: 10.1016/j.isci.2023.108666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 10/15/2023] [Accepted: 12/05/2023] [Indexed: 12/30/2023] Open
Abstract
A rebalance between energy supply and demand in HBV-specific-CD8+ activated progenitor (AP) cells could restore the functionality of proliferative progeny (PP) in e-antigen(Ag)-negative chronic hepatitis B (CHBe(-)). We observed that quiescent progenitor (QP [TCF1+/FSClow]) HBVcore-specific-CD8+ cells displayed a memory-like phenotype. Following Ag-encounter, the generated AP [TCF1+/FSChigh] subset maintained the PD1+/CD127+ phenotype and gave rise to proliferative progeny (PP [ TCF1-/FSChigh]). In AP cells, IL-15 compared to IL2 decreased the initial mTORC1 boost, but maintained its activation longer linked to a catabolic profile that correlated with enhanced PP effector abilities. In nucleos(t)ide analogue (NUC)-treated CHBe(-), AP subset showed an anabolic phenotype associated with a dysfunctional PP pool. In CHBe(-) cases with low probability of HBVcore-specific-CD8+ cell on-NUC-treatment restoration, according to a clinical predictive model, IL-15/anti-PD-L1 treatment re-established their reactivity. Therefore, IL-15 could improve AP pool energy balance by decreasing intensity but extending T cell activation and by inducing a more catabolic metabolism.
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Affiliation(s)
- Julia Peña-Asensio
- Department of Biology of Systems, University of Alcalá, 28801 Alcalá de Henares, Madrid, Spain
- Instituto de Investigación Sanitaria de Castilla La-Mancha (IDISCAM), 45071 Toledo, Castilla La-Mancha, Spain
| | - Henar Calvo-Sánchez
- Section of Gastroenterology, Guadalajara University Hospital, 19002 Guadalajara, Castilla La-Mancha, Spain
- Department of Medicine & Medical Specialties, University of Alcalá, 28801 Alcalá de Henares, Madrid, Spain
- Instituto de Investigación Sanitaria de Castilla La-Mancha (IDISCAM), 45071 Toledo, Castilla La-Mancha, Spain
| | - Joaquín Miquel
- Section of Gastroenterology, Guadalajara University Hospital, 19002 Guadalajara, Castilla La-Mancha, Spain
- Instituto de Investigación Sanitaria de Castilla La-Mancha (IDISCAM), 45071 Toledo, Castilla La-Mancha, Spain
| | - Eduardo Sanz-de-Villalobos
- Section of Gastroenterology, Guadalajara University Hospital, 19002 Guadalajara, Castilla La-Mancha, Spain
- Instituto de Investigación Sanitaria de Castilla La-Mancha (IDISCAM), 45071 Toledo, Castilla La-Mancha, Spain
| | - Alejandro González-Praetorius
- Section of Microbiology, Guadalajara University Hospital, 19002 Guadalajara, Castilla La-Mancha, Spain
- Instituto de Investigación Sanitaria de Castilla La-Mancha (IDISCAM), 45071 Toledo, Castilla La-Mancha, Spain
| | - Miguel Torralba
- Service of Internal Medicine, Guadalajara University Hospital, 19002 Guadalajara, Castilla La-Mancha, Spain
- Department of Medicine & Medical Specialties, University of Alcalá, 28801 Alcalá de Henares, Madrid, Spain
- Instituto de Investigación Sanitaria de Castilla La-Mancha (IDISCAM), 45071 Toledo, Castilla La-Mancha, Spain
| | - Juan-Ramón Larrubia
- Section of Gastroenterology, Guadalajara University Hospital, 19002 Guadalajara, Castilla La-Mancha, Spain
- Department of Medicine & Medical Specialties, University of Alcalá, 28801 Alcalá de Henares, Madrid, Spain
- Instituto de Investigación Sanitaria de Castilla La-Mancha (IDISCAM), 45071 Toledo, Castilla La-Mancha, Spain
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Tsiakos K, Gavrielatou N, Vathiotis IA, Chatzis L, Chatzis S, Poulakou G, Kotteas E, Syrigos NK. Programmed Cell Death Protein 1 Axis Inhibition in Viral Infections: Clinical Data and Therapeutic Opportunities. Vaccines (Basel) 2022; 10:vaccines10101673. [PMID: 36298538 PMCID: PMC9611078 DOI: 10.3390/vaccines10101673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/29/2022] [Accepted: 10/05/2022] [Indexed: 11/16/2022] Open
Abstract
A vital function of the immune system is the modulation of an evolving immune response. It is responsible for guarding against a wide variety of pathogens as well as the establishment of memory responses to some future hostile encounters. Simultaneously, it maintains self-tolerance and minimizes collateral tissue damage at sites of inflammation. In recent years, the regulation of T-cell responses to foreign or self-protein antigens and maintenance of balance between T-cell subsets have been linked to a distinct class of cell surface and extracellular components, the immune checkpoint molecules. The fact that both cancer and viral infections exploit similar, if not the same, immune checkpoint molecules to escape the host immune response highlights the need to study the impact of immune checkpoint blockade on viral infections. More importantly, the process through which immune checkpoint blockade completely changed the way we approach cancer could be the key to decipher the potential role of immunotherapy in the therapeutic algorithm of viral infections. This review focuses on the effect of programmed cell death protein 1/programmed death-ligand 1 blockade on the outcome of viral infections in cancer patients as well as the potential benefit from the incorporation of immune checkpoint inhibitors (ICIs) in treatment of viral infections.
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Affiliation(s)
- Konstantinos Tsiakos
- 3rd Department of Internal Medicine, Medical School, National and Kapodistrian University of Athens, 157 72 Athens, Greece
- Correspondence:
| | - Niki Gavrielatou
- Department of Pathology, School of Medicine, Yale University, New Haven, CT 06520, USA
| | - Ioannis A. Vathiotis
- 3rd Department of Internal Medicine, Medical School, National and Kapodistrian University of Athens, 157 72 Athens, Greece
| | - Loukas Chatzis
- Pathophysiology Department, Athens School of Medicine, National and Kapodistrian University of Athens, 157 72 Athens, Greece
| | - Stamatios Chatzis
- Department of Internal Medicine, Medical School, National and Kapodistrian University of Athens, “Hippokration” Hospital, 115 27 Athens, Greece
| | - Garyfallia Poulakou
- 3rd Department of Internal Medicine, Medical School, National and Kapodistrian University of Athens, 157 72 Athens, Greece
| | - Elias Kotteas
- 3rd Department of Internal Medicine, Medical School, National and Kapodistrian University of Athens, 157 72 Athens, Greece
| | - Nikolaos K. Syrigos
- 3rd Department of Internal Medicine, Medical School, National and Kapodistrian University of Athens, 157 72 Athens, Greece
- Dana-Farber Brigham Cancer Center, Boston, MA 02215, USA
- Harvard Medical School, Boston, MA 02215, USA
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Peña-Asensio J, Calvo H, Torralba M, Miquel J, Sanz-de-Villalobos E, Larrubia JR. Gamma-Chain Receptor Cytokines & PD-1 Manipulation to Restore HCV-Specific CD8 + T Cell Response during Chronic Hepatitis C. Cells 2021; 10:cells10030538. [PMID: 33802622 PMCID: PMC8001543 DOI: 10.3390/cells10030538] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/23/2021] [Accepted: 02/26/2021] [Indexed: 02/05/2023] Open
Abstract
Hepatitis C virus (HCV)-specific CD8+ T cell response is essential in natural HCV infection control, but it becomes exhausted during persistent infection. Nowadays, chronic HCV infection can be resolved by direct acting anti-viral treatment, but there are still some non-responders that could benefit from CD8+ T cell response restoration. To become fully reactive, T cell needs the complete release of T cell receptor (TCR) signalling but, during exhaustion this is blocked by the PD-1 effect on CD28 triggering. The T cell pool sensitive to PD-1 modulation is the progenitor subset but not the terminally differentiated effector population. Nevertheless, the blockade of PD-1/PD-L1 checkpoint cannot be always enough to restore this pool. This is due to the HCV ability to impair other co-stimulatory mechanisms and metabolic pathways and to induce a pro-apoptotic state besides the TCR signalling impairment. In this sense, gamma-chain receptor cytokines involved in memory generation and maintenance, such as low-level IL-2, IL-7, IL-15, and IL-21, might carry out a positive effect on metabolic reprogramming, apoptosis blockade and restoration of co-stimulatory signalling. This review sheds light on the role of combinatory immunotherapeutic strategies to restore a reactive anti-HCV T cell response based on the mixture of PD-1 blocking plus IL-2/IL-7/IL-15/IL-21 treatment.
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MESH Headings
- Antibodies, Monoclonal/therapeutic use
- B7-H1 Antigen/antagonists & inhibitors
- B7-H1 Antigen/genetics
- B7-H1 Antigen/immunology
- CD8-Positive T-Lymphocytes/drug effects
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/virology
- Gene Expression Regulation
- Hepacivirus/immunology
- Hepacivirus/pathogenicity
- Hepatitis C, Chronic/drug therapy
- Hepatitis C, Chronic/genetics
- Hepatitis C, Chronic/immunology
- Hepatitis C, Chronic/virology
- Host-Pathogen Interactions/drug effects
- Host-Pathogen Interactions/genetics
- Host-Pathogen Interactions/immunology
- Humans
- Immune Checkpoint Inhibitors/therapeutic use
- Immunity, Cellular/drug effects
- Immunotherapy/methods
- Interleukins/genetics
- Interleukins/immunology
- Interleukins/therapeutic use
- Lymphocyte Activation/drug effects
- Precursor Cells, T-Lymphoid/drug effects
- Precursor Cells, T-Lymphoid/immunology
- Precursor Cells, T-Lymphoid/virology
- Programmed Cell Death 1 Receptor/antagonists & inhibitors
- Programmed Cell Death 1 Receptor/genetics
- Programmed Cell Death 1 Receptor/immunology
- Receptors, Antigen, T-Cell, gamma-delta/agonists
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Receptors, Antigen, T-Cell, gamma-delta/immunology
- Signal Transduction
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Affiliation(s)
- Julia Peña-Asensio
- Translational Hepatology Unit, Guadalajara University Hospital, E-19002 Guadalajara, Spain; (J.P.-A.); (H.C.); (M.T.); (J.M.); (E.S.-d.-V.)
- Department of Biology of Systems, University of Alcalá, E-28805 Alcalá de Henares, Spain
| | - Henar Calvo
- Translational Hepatology Unit, Guadalajara University Hospital, E-19002 Guadalajara, Spain; (J.P.-A.); (H.C.); (M.T.); (J.M.); (E.S.-d.-V.)
- Section of Gastroenterology & Hepatology, Guadalajara University Hospital, E-19002 Guadalajara, Spain
| | - Miguel Torralba
- Translational Hepatology Unit, Guadalajara University Hospital, E-19002 Guadalajara, Spain; (J.P.-A.); (H.C.); (M.T.); (J.M.); (E.S.-d.-V.)
- Service of Internal Medicine, Guadalajara University Hospital, E-19002 Guadalajara, Spain
- Department of Medicine & Medical Specialties, University of Alcalá, E-28805 Alcalá de Henares, Spain
| | - Joaquín Miquel
- Translational Hepatology Unit, Guadalajara University Hospital, E-19002 Guadalajara, Spain; (J.P.-A.); (H.C.); (M.T.); (J.M.); (E.S.-d.-V.)
- Section of Gastroenterology & Hepatology, Guadalajara University Hospital, E-19002 Guadalajara, Spain
| | - Eduardo Sanz-de-Villalobos
- Translational Hepatology Unit, Guadalajara University Hospital, E-19002 Guadalajara, Spain; (J.P.-A.); (H.C.); (M.T.); (J.M.); (E.S.-d.-V.)
- Section of Gastroenterology & Hepatology, Guadalajara University Hospital, E-19002 Guadalajara, Spain
| | - Juan-Ramón Larrubia
- Translational Hepatology Unit, Guadalajara University Hospital, E-19002 Guadalajara, Spain; (J.P.-A.); (H.C.); (M.T.); (J.M.); (E.S.-d.-V.)
- Section of Gastroenterology & Hepatology, Guadalajara University Hospital, E-19002 Guadalajara, Spain
- Department of Medicine & Medical Specialties, University of Alcalá, E-28805 Alcalá de Henares, Spain
- Correspondence: ; Tel.: +34-949-20-9200
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Peña-Asensio J, Sanz-de-Villalobos E, Miquel J, Larrubia JR. Tumor necrosis family receptor superfamily member 9/tumor necrosis factor receptor-associated factor 1 pathway on hepatitis C viral persistence and natural history. World J Hepatol 2020; 12:754-765. [PMID: 33200014 PMCID: PMC7643212 DOI: 10.4254/wjh.v12.i10.754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 08/01/2020] [Accepted: 09/25/2020] [Indexed: 02/06/2023] Open
Abstract
Hepatitis C virus (HCV) infection is an excellent immunological model for understanding the mechanisms developed by non-cytopathic viruses and tumors to evade the adaptative immune response. The antigen-specific cytotoxic T cell response is essential for keeping HCV under control, but during persistent infection, these cells become exhausted or even deleted. The exhaustion process is progressive and depends on the infection duration and level of antigenemia. During high antigenic load and long duration of infection, T cells become extremely exhausted and ultimately disappear due to apoptosis. The development of exhaustion involves the impairment of positive co-stimulation induced by regulatory cytokines, such as transforming growth factor beta 1. This cytokine downregulates tumor necrosis factor receptor (TNFR)-associated factor 1 (TRAF1), the signal transducer of the T cell co-stimulatory molecule TNFR superfamily member 9 (known as 4-1BB). This impairment correlates with the low reactivity of T cells and an exhaustion phenotype. Treatment with interleukin-7 in vitro restores TRAF1 expression and rescues T cell effector function. The process of TRAF1 loss and its in vitro recovery is hierarchical, and more affected by severe disease progression. In conclusion, TRAF1 dynamics on T cells define a new pathogenic model that describes some aspects of the natural history of HCV, and sheds light on novel immunotherapy strategies for chronic viral infections and cancer.
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Affiliation(s)
- Julia Peña-Asensio
- Department of Systems Biology, Guadalajara University Hospital. University of Alcalá, Guadalajara E-19002, Guadalajara, Spain
| | - Eduardo Sanz-de-Villalobos
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Guadalajara E-19002, Guadalajara, Spain
| | - Joaquín Miquel
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Guadalajara E-19002, Guadalajara, Spain
| | - Juan Ramón Larrubia
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Guadalajara E-19002, Guadalajara, Spain
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5
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Bourque J, Hawiger D. Immunomodulatory Bonds of the Partnership between Dendritic Cells and T Cells. Crit Rev Immunol 2019; 38:379-401. [PMID: 30792568 DOI: 10.1615/critrevimmunol.2018026790] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
By acquiring, processing, and presenting both foreign and self-antigens, dendritic cells (DCs) initiate T cell activation that is shaped through the immunomodulatory functions of a variety of cell-membrane-bound molecules including BTLA-HVEM, CD40-CD40L, CTLA-4-CD80/CD86, CD70-CD27, ICOS-ICOS-L, OX40-OX40L, and PD-L1-PD-1, as well as several key cytokines and enzymes such as interleukin-6 (IL-6), IL-12, IL-23, IL-27, transforming growth factor-beta 1 (TGF-β1), retinaldehyde dehydrogenase (Raldh), and indoleamine 2,3-dioxygenase (IDO). Some of these distinct immunomodulatory signals are mediated by specific subsets of DCs, therefore contributing to the functional specialization of DCs in the priming and regulation of immune responses. In addition to responding to the DC-mediated signals, T cells can reciprocally modulate the immunomodulatory capacities of DCs, further refining immune responses. Here, we review recent studies, particularly in experimental mouse systems, that have delineated the integrated mechanisms of crucial immunomodulatory pathways that enable specific populations of DCs and T cells to work intimately together as single functional units that are indispensable for the maintenance of immune homeostasis.
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Affiliation(s)
- Jessica Bourque
- Department of Molecular Microbiology and Immunology, St. Louis University School of Medicine, St. Louis, MO, USA
| | - Daniel Hawiger
- Department of Molecular Microbiology and Immunology, St. Louis University School of Medicine, St. Louis, MO, USA
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6
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Hu JF, Zhang W, Zuo W, Tan HQ, Bai W. Inhibition of the PD-1/PD-L1 signaling pathway enhances innate immune response of alveolar macrophages to mycobacterium tuberculosis in mice. Pulm Pharmacol Ther 2019; 60:101842. [PMID: 31541762 DOI: 10.1016/j.pupt.2019.101842] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 06/11/2019] [Accepted: 09/17/2019] [Indexed: 02/01/2023]
Abstract
BACKGROUND Mycobacterium tuberculosis (TB) is a pathogen that consequently leads to TB infection, which remains a significant global health concern. Programmed death 1 (PD-1)/programmed death-ligand 1 (PD-L1) signaling pathway is critical for terminating immune responses. The present study aimed to elucidate the regulatory role of the PD-1/PD-L1 signaling pathway in alveolar macrophages against Mycobacterium TB in mice. METHODS Specific pathogen free mice were initially prepared for Mycobacterium TB model establishment. The alveolar macrophages of the successfully modeled rats were evaluated to determine the levels of PD-1, PD-L1, AKT, mTOR, TNF-α, NF-κB, IL-2, IL-4, IL-6, IL-10, IL-17, IL-17A, and IFN-γ. The surface makers of macrophages (CD11c, CD16, CD86, CD163, CD206, CX3CR-1 and CSF-1R), level of ROS, apoptosis and cell cycle, were all assessed. RESULTS Elevated levels of PD-1 and PD-L1, decreased levels of AKT and mTOR, along with elevated levels of TNF-α, NF-κB, IL-17, IL-2, IL-6, IL-17A and IFN-γ were identified in the alveolar macrophages infected with Mycobacterium TB, while an opposite trend was observed when PD-1/PD-L1 signaling pathway was inhibited. Additionally, elevated protein levels of CD11c, CD16 and CD86, as well as an increased rate of positive ROS and cell apoptosis, levels of Bax, and a diminished percentage of alveolar macrophages at the S and G2/M stages were detected in the event of Mycobacterium TB infection. A contrasting trend to the aforementioned findings was detected when the PD-1/PD-L1 signaling pathway was inhibited. CONCLUSION Taken together, these results suggested that inhibition of the PD-1/PD-L1 signaling pathway enhanced the innate immune response of alveolar macrophages to Mycobacterium TB in mice.
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Affiliation(s)
- Jin-Fang Hu
- Department of Pharmacology, The First Affiliated Hospital of Nanchang University, Nanchang, 330000, PR China
| | - Wei Zhang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, 330000, PR China
| | - Wei Zuo
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, 330000, PR China
| | - Hao-Qu Tan
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, 330000, PR China
| | - Wei Bai
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, 330000, PR China.
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7
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Singh P, Venkatesan A, Padmanabhan P, Gulyas B, Dass J FP. Codon usage of human hepatitis C virus clearance genes in relation to its expression. J Cell Biochem 2019; 121:534-544. [PMID: 31310376 DOI: 10.1002/jcb.29290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 03/15/2019] [Indexed: 11/08/2022]
Abstract
Hepatitis C virus (HCV) infection is among the leading causes of hepatocellular carcinoma and liver cirrhosis globally, with a high economic burden. The disease progression is well established, but less is known about the spontaneous HCV infection clearance. This study tries to establish the relationship between codon biasness and expression of HCV clearance candidate genes in normal and HCV infected liver tissues. A total of 112 coding sequences comprising 151 679 codons were subjected to the computation of codon indices, namely relative synonymous codon usage, an effective number of codon (Nc), frequency of optimal codon, codon adaptation index, codon bias index, and base compositions. Codon indices report of GC3s, GC12, hydropathicity, and aromaticity implicates both mutational and translational selection in the candidate gene set. This was further correlated with the differentially expressed genes among the selected genes using BioGPS. A significant correlation is observed between the gene expression of normal liver and cancerous liver tissues with codon bias (Nc). Gene expression is also correlated with relative codon bias values, indicating that CCL5, APOA2, CD28, IFITM1, and TNFSF4 genes have higher expression. These results are quite encouraging in selecting the high responsive genes in HCV clearance. However, there could be additional genes which could also orchestrate the clearance role with the above mentioned first line of defensive genes.
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Affiliation(s)
- Pratichi Singh
- Department of Integrative Biology, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu, India
| | - Arthi Venkatesan
- Department of Integrative Biology, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu, India
| | - Parasuraman Padmanabhan
- Centre for Neuroimaging Research at NTU (CeNReN), Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Balazs Gulyas
- Centre for Neuroimaging Research at NTU (CeNReN), Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Febin Prabhu Dass J
- Department of Integrative Biology, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu, India
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8
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Lenouvel D, González-Moles MÁ, Talbaoui A, Ramos-García P, González-Ruiz L, Ruiz-Ávila I, Gil-Montoya JA. An update of knowledge on PD-L1 in head and neck cancers: Physiologic, prognostic and therapeutic perspectives. Oral Dis 2019; 26:511-526. [PMID: 30866171 DOI: 10.1111/odi.13088] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 01/09/2019] [Accepted: 03/07/2019] [Indexed: 12/24/2022]
Abstract
Programmed cell death-ligand 1 (PD-L1) is a transmembrane protein that acts as a co-inhibitory factor in the immune response. Its receptor, programmed cell death protein 1 (PD-1), is found on immune cells, where binding to PD-L1 can reduce the proliferation of PD-1-positive cells, inhibit their cytokine secretion and induce apoptosis. PD-L1 in immune-privileged tissue plays a crucial role in peripheral tolerance. PD-L1 can be overexpressed in various malignancies, including oral squamous cell carcinoma, where it can attenuate the host immune response to tumour cells and has been associated with a worse prognosis. Monoclonal antibody therapies targeting the PD-1:PD-L1 axis have shown initial promise, but further research is needed to identify which patients will benefit. We provide an update of knowledge on PD-L1, including its structure, function and regulation. We also review studies on the overexpression of PD-L1 in cancer, specifically oral squamous cell carcinoma, and explore its potential value as a therapeutic target.
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Affiliation(s)
| | - Miguel Ángel González-Moles
- School of Dentistry, University of Granada, Granada, Spain.,Instituto de Investigación Biosanitaria, Granada, Spain
| | - Asmae Talbaoui
- School of Dentistry, University of Granada, Granada, Spain
| | | | - Lucía González-Ruiz
- Servicio de Dermatología, Hospital General Universitario de Ciudad Real, Ciudad Real, Spain
| | - Isabel Ruiz-Ávila
- Instituto de Investigación Biosanitaria, Granada, Spain.,Servicio de Anatomía Patológica, Complejo Hospitalario Universitario de Granada, Granada, Spain
| | - José Antonio Gil-Montoya
- School of Dentistry, University of Granada, Granada, Spain.,Instituto de Investigación Biosanitaria, Granada, Spain
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9
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Sarvari J, Dowran R, Hosseini SY, Fattahi MR, Erfani N. Association of PD-1 gene with outcome of hepatitis C virus infection. EXCLI JOURNAL 2018; 17:935-944. [PMID: 30564072 PMCID: PMC6295627 DOI: 10.17179/excli2018-1394] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 09/07/2018] [Indexed: 01/02/2023]
Abstract
Primary hepatitis C virus infection might be spontaneously cleared or become chronic. Polymorphisms in immune regulatory genes might influence the outcome. The aim of this study was to determine the frequency of genotypes and alleles of PD-1.3 and PD-1.5 gene loci in HCV infected patients and their association with the disease outcome. In this study 167 patients with chronic hepatic C and 42 individuals whose infection was spontaneously cleared, and a healthy control group comprising of 300 participants were included. The presence of chronic or spontaneously cleared infection amongst the participants was determined in advance by serologic and molecular methods. Genomic DNA was extracted using salting out method. PD-1 gene polymorphisms assay was performed using PCR-RFLP method. The frequency of alleles of PD-1.3 gene locus was significantly higher in the spontaneously cleared HCV infected group (P = 0.03) as well as the healthy control group (P = 0.04) in comparison to the chronic infected participants. In the case of PD-1.5 locus, there was no association between the frequency of inherited genotype or alleles and HCV infection outcome amongst the three groups. Haplotype analysis showed no statistically significant differences in the frequencies of different haplotypes between the three studied groups. Our finding collectively inferred that individuals with A allele at PD-1.3 locus might clear HCV infection more frequently than those with T allele. Instead, polymorphisms at PD-1.5 locus as well as haplotypes emerged from PD-1.3 G/A and PD-1.5 C/T might not be significant in the HCV infection outcome.
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Affiliation(s)
- Jamal Sarvari
- Gastroenterohepatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.,Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Razieh Dowran
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Younes Hosseini
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammad Reza Fattahi
- Gastroenterohepatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Nasrollah Erfani
- Department of Immunology and Institute for Cancer Research, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Mazouz S, Boisvert M, Shoukry NH, Lamarre D. Reversing immune dysfunction and liver damage after direct-acting antiviral treatment for hepatitis C. CANADIAN LIVER JOURNAL 2018; 1:78-105. [DOI: 10.3138/canlivj.1.2.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 03/20/2018] [Indexed: 12/12/2022]
Abstract
The introduction of small molecules targeting viral functions has caused a paradigm shift in hepatitis C virus (HCV) treatment. Administration of these direct-acting antivirals (DAAs) achieves a complete cure in almost all treated patients with short-duration therapy and minimal side effects. Although this is a major improvement over the previous pegylated interferon plus ribavirin (PEG-IFNα/RBV) standard-of-care treatment for HCV, remaining questions address several aspects of the long-term benefits of DAA therapy. Interferon (IFN)-based treatment with successful outcome was associated with substantial reduction in liver disease–related mortality. However, emerging data suggest a complex picture and several confounding factors that influence the effect of both IFN-based and DAA therapies on immune restoration and limiting liver disease progression. We review current knowledge of restoration of innate and HCV-specific immune responses in DAA-mediated viral elimination in chronic HCV infection, and we identify future research directions to achieve long-term benefits in all cured patients and reduce HCV-related liver disease morbidity and mortality.
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Affiliation(s)
- Sabrina Mazouz
- Centre de Recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, Québec, Canada
- Département de médecine, Faculté de médecine, Université de Montréal, Montréal, Québec, Canada
| | - Maude Boisvert
- Centre de Recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, Québec, Canada
- Département de médecine, Faculté de médecine, Université de Montréal, Montréal, Québec, Canada
| | - Naglaa H Shoukry
- Centre de Recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, Québec, Canada
- Département de médecine, Faculté de médecine, Université de Montréal, Montréal, Québec, Canada
| | - Daniel Lamarre
- Centre de Recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
- Département de microbiologie, infectiologie et immunologie, Faculté de médecine, Université de Montréal, Montréal, Québec, Canada
- Département de médecine, Faculté de médecine, Université de Montréal, Montréal, Québec, Canada
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11
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Du S, McCall N, Park K, Guan Q, Fontina P, Ertel A, Zhan T, Dicker AP, Lu B. Blockade of Tumor-Expressed PD-1 promotes lung cancer growth. Oncoimmunology 2018; 7:e1408747. [PMID: 29632720 PMCID: PMC5889288 DOI: 10.1080/2162402x.2017.1408747] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 11/13/2017] [Accepted: 11/15/2017] [Indexed: 12/22/2022] Open
Abstract
Anti-PD-1 immunotherapy is the standard of care for treating many patients with non-small cell lung cancer (NSCLC), yet mechanisms of treatment failure are emerging. We present a case of NSCLC, who rapidly progressed during a trial (NCT02318771) combining palliative radiotherapy and pembrolizumab. Planned tumor biopsy demonstrated PD-1 expression by NSCLC cells. We validated this observation by detecting PD-1 transcript in lung cancer cells and by co-localizing PD-1 and lung cancer-specific markers in resected lung cancer tissues. We further investigated the biological role of cancer-intrinsic PD-1 in a mouse lung cancer cell line, M109. Knockout or antibody blockade of PD-1 enhanced M109 viability in-vitro, while PD-1 overexpression and exposure to recombinant PD-L1 diminished viability. PD-1 blockade accelerated growth of M109-xenograft tumors with increased proliferation and decreased apoptosis in immune-deficient mice. This represents a first-time report of NSCLC-intrinsic PD-1 expression and a potential mechanism by which PD-1 blockade may promote cancer growth.
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Affiliation(s)
- Shisuo Du
- Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Neal McCall
- Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Kyewon Park
- Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Qing Guan
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Paolo Fontina
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Adam Ertel
- Department of Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Tingting Zhan
- Department of Pharmacology and Experimental Therapeutics, Division of Biostatistics, Thomas Jefferson University, Philadelphia, PA, USA
| | - Adam P Dicker
- Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Bo Lu
- Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, PA, USA
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According to Hepatitis C Virus (HCV) Infection Stage, Interleukin-7 Plus 4-1BB Triggering Alone or Combined with PD-1 Blockade Increases TRAF1 low HCV-Specific CD8 + Cell Reactivity. J Virol 2018; 92:JVI.01443-17. [PMID: 29093082 DOI: 10.1128/jvi.01443-17] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 10/23/2017] [Indexed: 12/14/2022] Open
Abstract
Hepatitis C virus (HCV)-specific CD8+ T cells suffer a progressive exhaustion during persistent infection (PI) with HCV. This process could involve the positive immune checkpoint 4-1BB/4-1BBL through the loss of its signal transducer, TRAF1. To address this issue, peripheral HCV-specific CD8+ T cells (pentamer-positive [pentamer+]/CD8+ T cells) from patients with PI and resolved infection (RI) after treatment were studied. The duration of HCV infection and the liver fibrosis progression rate inversely correlated with the likelihood of detection of peripheral pentamer+/CD8+ cells. In PI, pentamer+/CD8+ cells had impaired antigen-specific reactivity that worsened when these cells were not detectable ex vivo Short/midduration PI was characterized by detectable peripheral PD-1+ CD127low TRAF1low cells. After triggering of T cell receptors (TCR), the TRAF1 level positively correlated with the levels of CD127, Mcl-1, and CD107a expression and proliferation intensity but negatively with PD-1 expression, linking TRAF1low to exhaustion. In vitro treatment with interleukin-7 (IL-7) upregulated TRAF1 expression, while treatment with transforming growth factor-β1 (TGF-β1) did the opposite, suggesting that the IL-7/TGF-β1 balance, besides TCR stimulation, could be involved in TRAF1 regulation. In fact, the serum TGF-β1 concentration was higher in patients with PI than in patients with RI, and it negatively correlated with TRAF1 expression. In line with IL-7 increasing the level of TRAF1 expression, IL-7 plus 4-1BBL treatment in vitro enhanced T cell reactivity in patients with short/midduration infection. However, in patients with long-lasting PI, anti-PD-L1, in addition to the combination of IL-7 and 4-1BBL, was necessary to reestablish T cell proliferation in individuals with slowly progressing liver fibrosis (slow fibrosers) but had no effect in rapid fibrosers. In conclusion, a peripheral hyporeactive TRAF1low HCV-specific CD8+ T cell response, restorable by IL-7 plus 4-1BBL treatment, characterizes short/midduration PI. In long-lasting disease, HCV-specific CD8+ T cells are rarely detectable ex vivo, but treatment with IL-7, 4-1BBL, and anti-PD-L1 recovers their reactivity in vitro in slow fibrosers.IMPORTANCE Hepatitis C virus (HCV) infects 71 million people worldwide. Two-thirds develop a chronic disease that can lead to cirrhosis and hepatocellular carcinoma. Direct-acting antivirals clear the infection, but there are still patients who relapse. In these cases, additional immunotherapy could play a vital role. A successful anti-HCV immune response depends on virus-specific CD8+ T cells. During chronic infection, these cells are functionally impaired, which could be due to the failure of costimulation. This study describes exhausted specific T cells, characterized by low levels of expression of the signal transducer TRAF1 of the positive costimulatory pathway 4-1BB/4-1BBL. IL-7 upregulated TRAF1 expression and improved T cell reactivity in patients with short/midduration disease, while in patients with long-lasting infection, it was also necessary to block the negative PD-1/PD-L1 checkpoint. When the results are taken together, this work supports novel ways of restoring the specific CD8+ T cell response, shedding light on the importance of TRAF1 signaling. This could be a promising target for future immunotherapy.
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Modulation of PD-L1 and CD8 Activity in Idiopathic and Infectious Chronic Inflammatory Conditions. Appl Immunohistochem Mol Morphol 2017; 25:100-109. [PMID: 27438510 DOI: 10.1097/pai.0000000000000298] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Programmed death-ligand 1 (PD-L1) can reduce the immune response by inhibiting CD8 T-cell proliferation and cytotoxic activity. We studied a series of human viral (molloscum, human papillomavirus, herpes simplex, cytomegalovirus, Epstein-Barr virus, smallpox) and bacterial infections (Helicobacter pylori) for the in situ expression of PD-L1, mononuclear cell infiltration, and CD8 activity and compared this to noninfectious idiopathic inflammatory conditions to better define which immune responses may be more highly correlated with an infectious agent. Each viral and bacterial infection showed an increased PD-L1 expression that was most prominent in the mononuclear cell/CD8+ infiltrate surrounding the infection. However, the CD8 cells were mostly quiescent as evidenced by the low Ki67 index and minimal granzyme expression. Using a melanoma mouse model, acute reovirus infection increased PD-L1 expression, but decreased CD8 cytotoxic activity and Treg (FOXP3) cell numbers. In comparison, idiopathic noninfectious chronic inflammatory processes including lichen sclerosis, eczema, Sjogren's disease, and ulcerative colitis showed a comparable strong PD-L1 expression in the mononuclear cell infiltrates but much greater Treg infiltration. However, this strong immunosuppressor profile was ineffective as evidenced by strong CD8 proliferation and granzyme expression. These data suggest that viral and bacterial infections induce a PD-L1 response that, unlike noninfectious chronic inflammatory conditions, dampens the activity of the recruited CD8 cells which, in turn, may enhance the ability of anti-PD-L1 therapy to eliminate the infectious agent.
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14
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Gibbons Johnson RM, Dong H. Functional Expression of Programmed Death-Ligand 1 (B7-H1) by Immune Cells and Tumor Cells. Front Immunol 2017; 8:961. [PMID: 28848559 PMCID: PMC5554355 DOI: 10.3389/fimmu.2017.00961] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 07/27/2017] [Indexed: 01/05/2023] Open
Abstract
The programmed death-1 (PD-1) and its ligand PD-L1 (B7-H1) signaling pathway has been the focus of much enthusiasm in the fields of tumor immunology and oncology with recent FDA approval of the anti-PD-1 antibodies pembrolizumab and nivolumab and the anti-PD-L1 antibodies durvalumab, atezolimuab, and avelumab. These therapies, referred to here as PD-L1/PD-1 checkpoint blockade therapies, are designed to block the interaction between PD-L1, expressed by tumor cells, and PD-1, expressed by tumor-infiltrating CD8+ T cells, leading to enhanced antitumor CD8+ T cell responses and tumor regression. The influence of PD-L1 expressed by tumor cells on antitumor CD8+ T cell responses is well characterized, but the impact of PD-L1 expressed by immune cells has not been well defined for antitumor CD8+ T cell responses. Although PD-L1 expression by tumor cells has been used as a biomarker in selection of patients for PD-L1/PD-1 checkpoint blockade therapies, patients whose tumor cells lack PD-L1 expression often respond positively to PD-L1/PD-1 checkpoint blockade therapies. This suggests that PD-L1 expressed by non-malignant cells may also contribute to antitumor immunity. Here, we review the functions of PD-L1 expressed by immune cells in the context of CD8+ T cell priming, contraction, and differentiation into memory populations, as well as the role of PD-L1 expressed by tumor cells in regulating antitumor CD8+ T cell responses.
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Affiliation(s)
| | - Haidong Dong
- Department of Urology, College of Medicine, Mayo Clinic, Rochester, MN, United States.,Department of Immunology, College of Medicine, Mayo Clinic, Rochester, MN, United States
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Nikolova M, Wiedemann A, Muhtarova M, Achkova D, Lacabaratz C, Lévy Y. Subset- and Antigen-Specific Effects of Treg on CD8+ T Cell Responses in Chronic HIV Infection. PLoS Pathog 2016; 12:e1005995. [PMID: 27829019 PMCID: PMC5102588 DOI: 10.1371/journal.ppat.1005995] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Accepted: 10/12/2016] [Indexed: 12/30/2022] Open
Abstract
We, and others, have reported that in the HIV-negative settings, regulatory CD4+CD25highFoxP3+ T cells (Treg) exert differential effects on CD8 subsets, and maintain the memory / effector CD8+ T cells balance, at least in part through the PD-1/PD-L1 pathway. Here we investigated Treg-mediated effects on CD8 responses in chronic HIV infection. As compared to Treg from HIV negative controls (Treg/HIV-), we show that Treg from HIV infected patients (Treg/HIV+) did not significantly inhibit polyclonal autologous CD8+ T cell function indicating either a defect in the suppressive capacity of Treg/HIV+ or a lack of sensitivity of effector T cells in HIV infection. Results showed that Treg/HIV+ inhibited significantly the IFN-γ expression of autologous CD8+ T cells stimulated with recall CMV/EBV/Flu (CEF) antigens, but did not inhibit HIV-Gag-specific CD8+ T cells. In cross-over cultures, we show that Treg/HIV- inhibited significantly the differentiation of either CEF- or Gag-specific CD8+ T cells from HIV infected patients. The expression of PD-1 and PD-L1 was higher on Gag-specific CD8+ T cells as compared to CEF-specific CD8+ T cells, and the expression of these markers did not change significantly after Treg depletion or co-culture with Treg/HIV-, unlike on CEF-specific CD8+ T cells. In summary, we show a defect of Treg/HIV+ in modulating both the differentiation and the expression of PD-1/PD-L1 molecules on HIV-specific CD8 T cells. Our results strongly suggest that this particular defect of Treg might contribute to the exhaustion of HIV-specific T cell responses.
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Affiliation(s)
- Maria Nikolova
- INSERM, U955, Créteil, France
- Immunology Department, National Center of Infectious and Parasitic Diseases, Sofia, Bulgaria
| | - Aurélie Wiedemann
- INSERM, U955, Créteil, France
- Université Paris Est Créteil, Faculté de Médecine, Créteil, France
- Vaccine Research Institute, Créteil, France
| | - Maria Muhtarova
- Immunology Department, National Center of Infectious and Parasitic Diseases, Sofia, Bulgaria
| | - Daniela Achkova
- Immunology Department, National Center of Infectious and Parasitic Diseases, Sofia, Bulgaria
| | - Christine Lacabaratz
- INSERM, U955, Créteil, France
- Université Paris Est Créteil, Faculté de Médecine, Créteil, France
- Vaccine Research Institute, Créteil, France
| | - Yves Lévy
- INSERM, U955, Créteil, France
- Université Paris Est Créteil, Faculté de Médecine, Créteil, France
- Vaccine Research Institute, Créteil, France
- AP-HP, Groupe Henri-Mondor Albert-Chenevier, Immunologie clinique, Créteil, France
- * E-mail:
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16
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Wang H, Wu B, Li L, Hu L, Lin J, Jiang C, Cai G, Shen Q. Hepatic expansion of virus-specific CD8 +BTLA + T cells with regulatory properties in chronic hepatitis B virus infection. Cell Immunol 2016; 311:36-45. [PMID: 27743606 DOI: 10.1016/j.cellimm.2016.10.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 10/03/2016] [Accepted: 10/06/2016] [Indexed: 01/06/2023]
Abstract
Similar to programmed death-1 (PD-1), B and T lymphocyte attenuator (BTLA) is a co-inhibitory molecule of the CD28 family. PD-1 is involved in T cell exhaustion during chronic viral infection. However, the role of BTLA in virus-specific T cells is poorly defined. Here we investigated the expression and function of BTLA in T cells from patients with chronic hepatitis B virus (HBV) infection. The phenotype of peripheral and intrahepatic HBV-specific T cells from 43 patients with chronic HBV infection was assessed by flow cytometry. Functional evaluation was analyzed by T cell expansion and cytokine secretion after different treatments. In chronic HBV patients, a subset of inefficient interferon-γ producing antigen-specific CD8+ T cells recruited to the liver expressed high BTLA levels. The BTLA+ HBV-specific CD8+ T cell suppressive function was antigen-specific, at least in the induction phase, because they were only activated by a pool of HBV peptides but not with a pool of unrelated peptides. Suppression of T cell responses was restored by a BTLA signaling blockade and neutralizing IL-10, indicating that BTLA signaling-mediated IL-10 secretion plays a key role in suppression. This study provides important evidence that there is a subset of liver infiltrated virus-specific CD8+BTLA+ regulatory T cells in patients with chronic HBV infection. This subset of cells plays a pivotal role in controlling hepatic effector CD8+ T cell responses through BTLA signaling mediated regulatory factor IL-10 production.
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Affiliation(s)
- Huaizhou Wang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, PR China; Department of Experimental Diagnosis, Changhai Hospital, The Second Military Medical University, Shanghai, PR China
| | - Beiying Wu
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, PR China
| | - Lei Li
- Department of Clinical Pathology, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, PR China
| | - Liang Hu
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, PR China
| | - Jiafei Lin
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, PR China
| | - Cen Jiang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, PR China
| | - Gang Cai
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, PR China.
| | - Qian Shen
- Department of Experimental Diagnosis, Changhai Hospital, The Second Military Medical University, Shanghai, PR China
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Moreno-Cubero E, Larrubia JR. Specific CD8 + T cell response immunotherapy for hepatocellular carcinoma and viral hepatitis. World J Gastroenterol 2016; 22:6469-6483. [PMID: 27605882 PMCID: PMC4968127 DOI: 10.3748/wjg.v22.i28.6469] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 05/21/2016] [Accepted: 06/15/2016] [Indexed: 02/06/2023] Open
Abstract
Hepatocellular carcinoma (HCC), chronic hepatitis B (CHB) and chronic hepatitis C (CHC) are characterized by exhaustion of the specific CD8+ T cell response. This process involves enhancement of negative co-stimulatory molecules, such as programmed cell death protein-1 (PD-1), cytotoxic T-lymphocyte antigen-4 (CTLA-4), 2B4, Tim-3, CD160 and LAG-3, which is linked to intrahepatic overexpression of some of the cognate ligands, such as PD-L1, on antigen presenting cells and thereby favouring a tolerogenic environment. Therapies that disrupt these negative signalling mechanisms represent promising therapeutic tools with the potential to restore reactivity of the specific CD8+ T cell response. In this review we discuss the impressive in vitro and in vivo results that have been recently achieved in HCC, CHB and CHC by blocking these negative receptors with monoclonal antibodies against these immune checkpoint modulators. The article mainly focuses on the role of CTLA-4 and PD-1 blocking monoclonal antibodies, the first ones to have reached clinical practice. The humanized monoclonal antibodies against CTLA-4 (tremelimumab and ipilimumab) and PD-1 (nivolumab and pembrolizumab) have yielded good results in testing of HCC and chronic viral hepatitis patients. Trelimumab, in particular, has shown a significant increase in the time to progression in HCC, while nivolumab has shown a remarkable effect on hepatitis C viral load reduction. The research on the role of ipilimumab, nivolumab and pembrolizumab on HCC is currently underway.
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Sionov RV, Vlahopoulos SA, Granot Z. Regulation of Bim in Health and Disease. Oncotarget 2015; 6:23058-134. [PMID: 26405162 PMCID: PMC4695108 DOI: 10.18632/oncotarget.5492] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 08/08/2015] [Indexed: 11/25/2022] Open
Abstract
The BH3-only Bim protein is a major determinant for initiating the intrinsic apoptotic pathway under both physiological and pathophysiological conditions. Tight regulation of its expression and activity at the transcriptional, translational and post-translational levels together with the induction of alternatively spliced isoforms with different pro-apoptotic potential, ensure timely activation of Bim. Under physiological conditions, Bim is essential for shaping immune responses where its absence promotes autoimmunity, while too early Bim induction eliminates cytotoxic T cells prematurely, resulting in chronic inflammation and tumor progression. Enhanced Bim induction in neurons causes neurodegenerative disorders including Alzheimer's, Parkinson's and Huntington's diseases. Moreover, type I diabetes is promoted by genetically predisposed elevation of Bim in β-cells. On the contrary, cancer cells have developed mechanisms that suppress Bim expression necessary for tumor progression and metastasis. This review focuses on the intricate network regulating Bim activity and its involvement in physiological and pathophysiological processes.
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Affiliation(s)
- Ronit Vogt Sionov
- Department of Developmental Biology and Cancer Research, Institute for Medical Research Israel Canada, Hebrew University, Hadassah Medical School, Jerusalem, Israel
| | - Spiros A. Vlahopoulos
- First Department of Pediatrics, University of Athens, Horemeio Research Laboratory, Thivon and Levadias, Goudi, Athens, Greece
| | - Zvi Granot
- Department of Developmental Biology and Cancer Research, Institute for Medical Research Israel Canada, Hebrew University, Hadassah Medical School, Jerusalem, Israel
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Chen Y, Huang Z, Ma D, Chen L, Lai Q, Huang X, Zhou J, Zhang X, Ma Q, Chen Z, Zuo D. Involvement of soluble scavenger receptor A in suppression of T cell activation in patients with chronic hepatitis B. BMC Immunol 2015; 16:29. [PMID: 25982058 PMCID: PMC4434833 DOI: 10.1186/s12865-015-0088-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 03/31/2015] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Scavenger receptor A (SRA) is expressed predominantly in phagocytic cells playing an essential role in the host immune defense against invading microorganisms. Our previous study reported the presence of SRA in a soluble form in patients with infection of hepatitis B viruses (HBV). However, the association of soluble SRA with stages of HBV infection and the immune response induced by HBV is not fully determined. METHODS In this study, we detected soluble SRA in serum from 29 chronic hepatitis B (CHB) patients, 28 chronic HBV carriers in the immune tolerant (IT) stage, 33 in the HBeAg-negative inactive carrier (IC) stage, and 22 healthy controls (HCs), respectively. We further analyzed the correlation of detected soluble SRA to inflammation and serum viral load. In addition, we investigated the regulatory role of soluble SRA in T cell activation, especially in CD8(+) T cell response to HBV peptide. RESULTS We demonstrated that Median levels of serum soluble SRA in CHB and IT patients were significantly higher than those of IC patients and HCs. Additionally, the concentrations of soluble SRA were negatively correlated with alanine transaminase levels in CHB patients. We also found that serum concentration of SRA was decreased during telbivudine treatment. Expressed SRA extracellular domain suppressed HBV core peptide-stimulated interferon-γ and tumor necrosis factor-α production in CD8(+) T cells, and it bound to T cells in a higher frequency in CHB patients than in HCs. Furthermore, we observed that naïve human T cells stimulated by anti-CD3 and CD28 antibodies in the presence of the recombinant SRA protein had reduced activation and proliferation. CONCLUSION In summary, we determined the level of soluble SRA in different stages of CHB patients. SRA might inhibit T cell proliferation and activation as a soluble form. These results not only revealed a previously unknown feature of soluble SRA in CHB patients but also provided broad understanding of SRA in T cell activation.
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Affiliation(s)
- Ying Chen
- Department of Immunology, School of Basic Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Zuxiong Huang
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, China. .,Department of Hepatology, Affiliated Infectious Disease Hospital of Fujian Medical University, Fuzhou, China.
| | - Di Ma
- Department of Immunology, School of Basic Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Liqian Chen
- Department of Immunology, School of Basic Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Qintao Lai
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, China.
| | - Xuan Huang
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, China.
| | - Jia Zhou
- Department of Immunology, School of Basic Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Xiaoyong Zhang
- State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, China.
| | - Qiang Ma
- Institute of Antibody Engineering, School of Biotechnology, Southern Medical University, Guangzhou, China.
| | - Zhengliang Chen
- Department of Immunology, School of Basic Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Daming Zuo
- Department of Immunology, School of Basic Medicine, Southern Medical University, Guangzhou, 510515, China. .,State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, China.
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Larrubia JR, Moreno-Cubero E, Miquel J, Sanz-de-Villalobos E. Hepatitis C virus-specific cytotoxic T cell response restoration after treatment-induced hepatitis C virus control. World J Gastroenterol 2015; 21:3480-3491. [PMID: 25834312 PMCID: PMC4375569 DOI: 10.3748/wjg.v21.i12.3480] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 12/10/2014] [Accepted: 02/05/2015] [Indexed: 02/06/2023] Open
Abstract
Hepatitis C virus (HCV)-specific cytotoxic T cell (CTL) response plays a major role in viral control during spontaneous infection resolution. These cells develop an exhausted and pro-apoptotic status during chronic onset, being unable to get rid of HCV. The role of this response in contributing to sustained viral response (SVR) after anti-HCV is controversial. Recent studies show that after successful interferon-based anti-HCV treatment, HCV traces are still detectable and this correlates with a peak of HCV-specific CTL response activation, probably responsible for maintaining SVR by subsequent complete HCV clearing. Moreover, SVR patients’ serum is still able to induce HCV infection in naïve chimpanzees, suggesting that the infection could be under the control of the immune system after a successful treatment, being transmissible in absence of this adaptive response. At least theoretically, treatment-induced viral load decrease could allow an effective HCV-specific CTL response reestablishment. This effect has been recently described with anti-HCV interferon-free regimes, based on direct-acting antivirals. Nevertheless, this is to some extent controversial with interferon-based therapies, due to the detrimental immunoregulatory α-interferon effect on T cells. Moreover, HCV-specific CTL response features during anti-HCV treatment could be a predictive factor of SVR that could have clinical implications in patient management. In this review, the recent knowledge about the role of HCV-specific CTL response in the development of SVR after anti-HCV treatment is discussed.
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Mittal R, Chen CW, Lyons JD, Margoles LM, Liang Z, Coopersmith CM, Ford ML. Murine lung cancer induces generalized T-cell exhaustion. J Surg Res 2015; 195:541-9. [PMID: 25748104 DOI: 10.1016/j.jss.2015.02.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 02/03/2015] [Accepted: 02/04/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND Cancer is known to modulate tumor-specific immune responses by establishing a microenvironment that leads to the upregulation of T-cell inhibitory receptors, resulting in the progressive loss of function and eventual death of tumor-specific T-cells. However, the ability of cancer to impact the functionality of the immune system on a systemic level is much less well characterized. Because cancer is known to predispose patients to infectious complications including sepsis, we hypothesized that the presence of cancer alters pathogen-directed immune responses on a systemic level. MATERIALS AND METHODS We assessed systemic T-cell coinhibitory receptor expression, cytokine production, and apoptosis in mice with established subcutaneous lung cancer tumors and in unmanipulated mice without cancer. RESULTS Results indicated that the frequencies of programmed death-1-positive, B and T lymphocyte attenuator-positive, and 2B4(+) cells in both the CD4(+) and CD8(+) T-cell compartments were increased in mice with localized cancer relative to non-cancer controls, and the frequencies of both CD4(+) and CD8(+) T-cells expressing multiple different inhibitory receptors were increased in cancer animals relative to non-cancer controls. Additionally, 2B4(+)CD8(+) T-cells in cancer mice exhibited reduced interleukin-2 and interferon-γ, whereas B and T lymphocyte attenuator-positive CD8(+) T-cells in cancer mice exhibited reduced interleukin-2 and tumor necrosis factor. Conversely, CD4(+) T-cells in cancer animals demonstrated an increase in the frequency of annexin V(+) apoptotic cells. CONCLUSIONS Taken together, these data suggest that the presence of cancer induces systemic T-cell exhaustion and generalized immune suppression.
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Affiliation(s)
- Rohit Mittal
- Department of Surgery and Emory Critical Care Center, Emory University School of Medicine, Atlanta, Georgia
| | - Ching-Wen Chen
- Department of Surgery and Emory Critical Care Center, Emory University School of Medicine, Atlanta, Georgia
| | - John D Lyons
- Department of Surgery and Emory Critical Care Center, Emory University School of Medicine, Atlanta, Georgia
| | - Lindsay M Margoles
- Department of Infectious Diseases and Emory Critical Care Center, Emory University School of Medicine, Atlanta, Georgia
| | - Zhe Liang
- Department of Surgery and Emory Critical Care Center, Emory University School of Medicine, Atlanta, Georgia
| | - Craig M Coopersmith
- Department of Surgery and Emory Critical Care Center, Emory University School of Medicine, Atlanta, Georgia
| | - Mandy L Ford
- Department of Surgery and Emory Transplant Center, Emory University School of Medicine, Atlanta, Georgia.
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22
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Gibbons RM, Liu X, Pulko V, Harrington SM, Krco CJ, Kwon ED, Dong H. B7-H1 limits the entry of effector CD8(+) T cells to the memory pool by upregulating Bim. Oncoimmunology 2014; 1:1061-1073. [PMID: 23170254 PMCID: PMC3494620 DOI: 10.4161/onci.20850] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Protective T‑cell immunity against cancer and infections is dependent on the generation of a durable effector and memory T‑cell pool. Studies from cancer and chronic infections reveal that B7-H1 (PD-L1) engagement with its receptor PD-1 promotes apoptosis of effector T cells. It is not clear how B7-H1 regulates T‑cell apoptosis and the subsequent impact of B7-H1 on the generation of memory T cells. In immunized B7-H1-deficient mice, we detected an increased expansion of effector CD8+ T cells and a delayed T‑cell contraction followed by the emergence of a protective CD8+ T‑cell memory capable of completely rejecting tumor metastases in the lung. Intracellular staining revealed that antigen-primed CD8+ T cells in B7-H1-deficient mice express lower levels of the pro-apoptotic molecule Bim. The engagement of activated CD8+ T cells by a plate-bound B7-H1 fusion protein led to the upregulation of Bim and increased cell death. Assays based on blocking antibodies determined that both PD-1 and CD80 are involved in the B7-H1-mediated regulation of Bim in activated CD8+ T cells. Our results suggest that B7-H1 may negatively regulate CD8+ T‑cell memory by enhancing the depletion of effector CD8+ T cells through the upregulation of Bim. Our findings may provide a new strategy for targeting B7-H1 signaling in effector CD8+ T cells to achieve protective antitumor memory responses.
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Affiliation(s)
- Rachel M Gibbons
- Department of Immunology; College of Medicine; Mayo Clinic; Rochester, MN USA
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23
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Hakim MS, Spaan M, Janssen HLA, Boonstra A. Inhibitory receptor molecules in chronic hepatitis B and C infections: novel targets for immunotherapy? Rev Med Virol 2013; 24:125-38. [DOI: 10.1002/rmv.1779] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Mohamad S. Hakim
- Liver Unit, Department of Gastroenterology and Hepatology; Erasmus MC, University Medical Center Rotterdam; Rotterdam The Netherlands
| | - Michelle Spaan
- Liver Unit, Department of Gastroenterology and Hepatology; Erasmus MC, University Medical Center Rotterdam; Rotterdam The Netherlands
| | - Harry L. A. Janssen
- Liver Unit, Department of Gastroenterology and Hepatology; Erasmus MC, University Medical Center Rotterdam; Rotterdam The Netherlands
- Liver Clinic University Health Network, Division of Gastroenterology; University of Toronto; Toronto Canada
| | - Andre Boonstra
- Liver Unit, Department of Gastroenterology and Hepatology; Erasmus MC, University Medical Center Rotterdam; Rotterdam The Netherlands
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24
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Abstract
The liver is the largest organ in the body and is generally regarded by nonimmunologists as having little or no lymphoid function. However, such is far from accurate. This review highlights the importance of the liver as a lymphoid organ. Firstly, we discuss experimental data surrounding the role of liver as a lymphoid organ. The liver facilitates tolerance rather than immunoreactivity, which protects the host from antigenic overload of dietary components and drugs derived from the gut and it is instrumental to fetal immune tolerance. Loss of liver tolerance leads to autoaggressive phenomena, which if not controlled by regulatory lymphoid populations, may lead to the induction of autoimmune liver diseases. Liver-related lymphoid subpopulations also act as critical antigen-presenting cells. The study of the immunological properties of liver and delineation of the microenvironment of the intrahepatic milieu in normal and diseased livers provides a platform to understand the hierarchy of a series of detrimental events that lead to immune-mediated destruction of the liver and the rejection of liver allografts. The majority of emphasis within this review will be on the normal mononuclear cell composition of the liver. However, within this context, we will discuss selected, but not all, immune-mediated liver disease and attempt to place these data in the context of human autoimmunity.
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Affiliation(s)
- Dimitrios P Bogdanos
- Institute of Liver Studies, Transplantation Immunology and Mucosal Biology, King's College London School of Medicine at King's College Hospital, London, UK
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25
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Larrubia JR, Lokhande MU, Moreno-Cubero E, García-Garzón S, Miquel J, Parra-Cid T, González-Praetorious A, Perna C, Lázaro A, Sanz-de-Villalobos E. HCV-specific CD8+ cell detection at week 12 of chronic hepatitis C treatment with PEG-interferon-α2b/ribavirin correlates with infection resolution. Cell Immunol 2013; 286:31-8. [PMID: 24287274 DOI: 10.1016/j.cellimm.2013.11.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Revised: 10/08/2013] [Accepted: 11/04/2013] [Indexed: 12/14/2022]
Abstract
Lower than 2-log viral-load (VL) decrease at week 12 (w12) of chronic hepatitis C (CHC) treatment with Peg-interferon/ribavirin has 100% negative predictive value (PV) of sustained virologic response (SVR), and this could be related with absence of HCV-specific cytotoxic T lymphocyte (CTL) response. In this study, percentage of cases with SVR, according to peripheral HCV-specific cytotoxic response at w12, was analysed (Group-1: detection(+), Group-2: detection(-)). SVR was higher in group-1 (93%) than in group-2 (47%) (p=0.003). An increase on HCV-specific CTL frequency between baseline and w12 and higher specific reactivity were observed in group-1 (p=0.011 and p=0.025). HCV-specific CTL detection at w12 correlated with level of VL decrease (p=0.016, r=0.389), and among HCV genotype-1 patients with either early or delayed virologic response (EDVR), 100% positive PV of SVR was observed. In summary, HCV-specific CTL detection at w12 of Peg-interferon/ribavirin treatment correlates with SVR and in EDVR genotype-1 cases predicts SVR.
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MESH Headings
- Adult
- Antiviral Agents/therapeutic use
- Biomarkers/analysis
- Drug Therapy, Combination
- Female
- Hepacivirus/drug effects
- Hepacivirus/immunology
- Hepatitis C, Chronic/diagnosis
- Hepatitis C, Chronic/drug therapy
- Hepatitis C, Chronic/immunology
- Hepatitis C, Chronic/virology
- Humans
- Interferon-alpha/therapeutic use
- Lymphocyte Count
- Male
- Middle Aged
- Polyethylene Glycols/therapeutic use
- RNA, Viral/antagonists & inhibitors
- RNA, Viral/immunology
- Recombinant Proteins/therapeutic use
- Ribavirin/therapeutic use
- T-Lymphocytes, Cytotoxic/drug effects
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/virology
- Treatment Outcome
- Viral Load/drug effects
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Affiliation(s)
- Juan-Ramón Larrubia
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Donante de Sangre St., 19002 Guadalajara, Spain.
| | - Megha-Uttam Lokhande
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Donante de Sangre St., 19002 Guadalajara, Spain.
| | - Elia Moreno-Cubero
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Donante de Sangre St., 19002 Guadalajara, Spain.
| | - Silvia García-Garzón
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Donante de Sangre St., 19002 Guadalajara, Spain.
| | - Joaquín Miquel
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Donante de Sangre St., 19002 Guadalajara, Spain.
| | - Trinidad Parra-Cid
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Donante de Sangre St., 19002 Guadalajara, Spain.
| | - Alejandro González-Praetorious
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Donante de Sangre St., 19002 Guadalajara, Spain.
| | - Cristian Perna
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Donante de Sangre St., 19002 Guadalajara, Spain.
| | - Alicia Lázaro
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Donante de Sangre St., 19002 Guadalajara, Spain.
| | - Eduardo Sanz-de-Villalobos
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Donante de Sangre St., 19002 Guadalajara, Spain.
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26
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Wang XF, Lei Y, Chen M, Chen CB, Ren H, Shi TD. PD-1/PDL1 and CD28/CD80 pathways modulate natural killer T cell function to inhibit hepatitis B virus replication. J Viral Hepat 2013; 20 Suppl 1:27-39. [PMID: 23458522 DOI: 10.1111/jvh.12061] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Accepted: 12/08/2012] [Indexed: 12/31/2022]
Abstract
α-Galactosylceramide (α-GalCer)-activated natural killer T (NKT) cells have antiviral properties against hepatitis B virus (HBV). However, α-GalCer activation of NKT cells can induce anergy. We hypothesized that this effect may be overcome by a treatment strategy that includes manipulation of CD28/CD80 costimulatory and PD-1/PDL1 coinhibitory signals of NKT cells, thereby enhancing the anti-HBV effect of α-GalCer. We established a transgenic mouse model of chronic HBV infection and investigated hepatic NKT cell frequencies, functions and expression of immunomodulatory factors. Our results showed that compared with uninfected control mice, hepatic NKT cells from HBV transgenic mice displayed lower frequencies (7.91% vs 16.74%, P < 0.05), impaired capabilities to produce interferon (IFN)-γ (5.6% vs 1.4%, P < 0.05) and interleukin (IL)-4 (6.8% vs 0.3%, P < 0.05), higher expression of PD-1 (9.64% vs 6.36%, P < 0.05) and lower expression of CD28 (5.05% vs 28.88%, P < 0.05). However, when hepatic mononuclear cells (MNCs) were isolated from HBV transgenic mice, α-GalCer exposure in culture remarkably upregulated both PD-1(+) NKT cells (P < 0.05) and CD28(+) NKT cells (P < 0.05). Furthermore, when HBV transgenic mice were treated with combination therapies consisting of α-GalCer and anti-PDL1 monoclonal antibody (mAb) and/or anti-CD80/anti-CD28 mAbs, IFN-γ(+) NKT cell frequency was selectively increased (P < 0.05) and HBV replication was suppressed; these effects were accompanied by varying degrees and types of liver damage. Surprisingly, activating CD28/CD80 signal in HBV transgenic mice was more effective but caused less liver injury than blocking PD-1/PDL1 signal in modulating αGalCer-activated NKT cell function to inhibit HBV infection. Our findings also show that combined therapy with blocking PD-1/PDL1 and activating CD28/CD80 signal in the presence of aGalCer cannot superimpose the effect of antivirus. α-GalCer combination therapy that modulates the CD28/CD80 pathways of NKT cells may represent a promising approach to inhibit HBV replication in chronically infected patients.
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Affiliation(s)
- X F Wang
- Institute of Viral Hepatitis, Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education, Chongqing Medical University, Second Affiliated Hospital, Chongqing, China
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27
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Larrubia JR, Lokhande MU, García-Garzón S, Miquel J, Subirá D, Sanz-de-Villalobos E. Role of T cell death in maintaining immune tolerance during persistent viral hepatitis. World J Gastroenterol 2013; 19:1877-1889. [PMID: 23569333 PMCID: PMC3613103 DOI: 10.3748/wjg.v19.i12.1877] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 11/07/2012] [Accepted: 12/27/2012] [Indexed: 02/06/2023] Open
Abstract
Virus-specific T cells play an important role in the resolution of hepatic infection. However, during chronic hepatitis infection these cells lack their effector functions and fail to control the virus. Hepatitis B virus and hepatitis C virus have developed several mechanisms to generate immune tolerance. One of these strategies is the depletion of virus-specific T cells by apoptosis. The immunotolerogenic liver has unique property to retain and activate naïve T cell to avoid the over reactivation of immune response against antigens which is exploited by hepatotropic viruses to persist. The deletion of the virus-specific T cells occurs by intrinsic (passive) apoptotic mechanism. The pro-apoptotic molecule Bcl-2 interacting mediator (Bim) has attracted increasing attention as a pivotal involvement in apoptosis, as a regulator of tissue homeostasis and an enhancer for the viral persistence. Here, we reviewed our current knowledge on the evidence showing critical role of Bim in viral-specific T cell death by apoptotic pathways and helps in the immune tolerance.
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28
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Schmidt J, Blum HE, Thimme R. T-cell responses in hepatitis B and C virus infection: similarities and differences. Emerg Microbes Infect 2013; 2:e15. [PMID: 26038456 PMCID: PMC3630955 DOI: 10.1038/emi.2013.14] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 02/13/2013] [Accepted: 02/17/2013] [Indexed: 01/05/2023]
Abstract
Chronic hepatitis B virus (HBV) and hepatitis C virus (HCV) infection are global health problems affecting 600 million people worldwide. Indeed, HBV and HCV are hepatotropic viruses that can cause acute and chronic liver disease progressing to liver cirrhosis and even hepatocellular carcinoma. Furthermore, co-infections of HBV and HCV with HIV are emerging worldwide. These co-infections are even more likely to develop persistent infection and are difficult to treat. There is growing evidence that virus-specific CD4+ and CD8+ T-cell responses play a central role in the outcome and pathogenesis of HBV and HCV infection. While virus-specific T-cell responses are able to successfully clear the virus in a subpopulation of patients, failure of these T-cell responses is associated with the development of viral persistence. In this review article, we will discuss similarities and differences in HBV- and HCV-specific T-cell responses that are central in determining viral clearance, persistence and liver disease.
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Affiliation(s)
- Julia Schmidt
- Department of Medicine II, University Hospital Freiburg , D-79106 Freiburg, Germany
| | - Hubert E Blum
- Department of Medicine II, University Hospital Freiburg , D-79106 Freiburg, Germany
| | - Robert Thimme
- Department of Medicine II, University Hospital Freiburg , D-79106 Freiburg, Germany
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29
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Gottschalk C, Damuzzo V, Gotot J, Kroczek RA, Yagita H, Murphy KM, Knolle PA, Ludwig-Portugall I, Kurts C. Batf3-dependent dendritic cells in the renal lymph node induce tolerance against circulating antigens. J Am Soc Nephrol 2013; 24:543-9. [PMID: 23411785 DOI: 10.1681/asn.2012101022] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Although the spleen is a major site where immune tolerance to circulating innocuous antigens occurs, the kidney also contributes. Circulating antigens smaller than albumin are constitutively filtered and concentrated in the kidney and reach the renal lymph node by lymphatic drainage, where resident dendritic cells (DCs) capture them and induce tolerance of specific cytotoxic T cells through unknown mechanisms. Here, we found that the coinhibitory cell surface receptor programmed death 1 (PD-1) on cytotoxic T cells mediates to their tolerance. Renal lymph node DCs of the CD8(+) XCR1(+) subset, which depend on the transcription factor Batf3, expressed the PD-1 cognate ligand PD-L1. Batf3-dependent DCs in the renal lymph node presented antigen that had been concentrated in the kidney and used PD-L1 to induce apoptosis of cytotoxic T cells. In contrast, T cell tolerance in the spleen was independent of PD-1, PD-L1, and Batf3. In summary, these results clarify how the kidney/renal lymph node system tolerizes the immune system against circulating innocuous antigens.
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Affiliation(s)
- Catherine Gottschalk
- Institutes of Molecular Medicine and Experimental Immunology, Rheinische Friedrich-Wilhelms-Universität, Sigmund Freud Strasse 25, 53105 Bonn, Germany
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30
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Larrubia JR, Lokhande MU, García-Garzón S, Miquel J, González-Praetorius A, Parra-Cid T, Sanz-de-Villalobos E. Persistent hepatitis C virus (HCV) infection impairs HCV-specific cytotoxic T cell reactivity through Mcl-1/Bim imbalance due to CD127 down-regulation. J Viral Hepat 2013; 20:85-94. [PMID: 23301543 DOI: 10.1111/j.1365-2893.2012.01618.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In persistent hepatitis C virus (HCV) infection, HCV-specific cytotoxic T lymphocyte (CTL) reactivity is impaired and this affects HCV control. Interleukin-7 receptor (CD127) expression on these cells could regulate CTL reactivity through Mcl-1/Bim balance modulation. Bim is a pro-apoptotic molecule blocked by the action of Mcl-1. Mcl-1/Bim expression and T cell reactivity on HCV-specific CTLs were compared according to CD127 phenotype. Peripheral blood lymphocytes (PBL) from HLA-A2(+) HCV(+) patients were obtained. HCV-specific CTLs were visualized by staining PBL with anti-CD8 and HLA-A2/peptide pentameric complexes (pentamer). Mcl-1/Bim/CD127 phenotype of HCV-specific CTLs was tested by staining detectable CD8(+)/pentamer(+) cells with anti-Mcl-1/Bim/CD127 antibodies. HCV-specific CTL proliferation ability after specific in vitro challenge was tested in the presence and absence of pancaspase inhibitor z-VAD-fmk. All stained cells were analysed by flow cytometry. CD127(low)-expressing HCV-specific CTLs associated with high HCV viraemia, while CD127(high) correlated with undetectable viral loads (P < 0.001). Directly ex vivo, pentamer(+) cell frequency was similar according to CD127 expression level. Nevertheless, CD127(low) pentamer(+) cell proliferation after specific in vitro challenge was impaired (P < 0.05), although this was corrected by z-VAD-fmk treatment (P < 0.05). Mcl-1 expression was low directly ex vivo (P < 0.01), and Bim was up-regulated after antigen encounter (P < 0.05) of CD127(low) pentamer(+) cells. The ex vivo difference between Mcl-1 and Bim expression on pentamer(+) cells correlated positively with CD127 expression level (P < 0.001) and with pentamer(+) cell reactivity (P < 0.05). In summary, a low ex vivo Mcl-1 expression and Bim up-regulation after antigen encounter are involved in CD127(low) HCV-specific CTL hyporeactivity during chronic infection, but it can be overcome by apoptosis blockade.
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Affiliation(s)
- J R Larrubia
- Translational Hepatology Unit, Guadalajara University Hospital, University of Alcalá, Guadalajara, Spain.
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31
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PD-1/PD-L1 blockade can enhance HIV-1 Gag-specific T cell immunity elicited by dendritic cell-directed lentiviral vaccines. Mol Ther 2012; 20:1800-9. [PMID: 22588271 DOI: 10.1038/mt.2012.98] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Exhaustion of CD8(+) T cells and upregulation of programmed death 1 (PD-1), a negative regulator of T cell activation, are characteristic features of individuals chronically infected with human immunodeficiency virus type 1. In a previous study, we showed in mice that a dendritic cell-directed lentiviral vector (DCLV) system encoding the human immunodeficiency virus (HIV)-1 Gag protein was an efficient vaccine modality to induce a durable Gag-specific T cell immune response. In this study, we demonstrate that blocking of the PD-1/PD-1 ligand (PD-L) inhibitory signal via an anti-PD-L1 antibody generated an enhanced HIV-1 Gag-specific CD8(+) immune response following both a single round of DCLV immunization and a homologous prime/boost regimen. The prime/boost regimen combined with PD-L1 blockade generated very high levels of Gag-specific CD8(+) T cells comprising several valuable features: improved ability to produce multiple cytokines, responding to a broader range of Gag-derived epitopes, and long-lasting memory. This enhanced cellular immune response generated by DCLV immunization combined with anti-PD-L1 blockade correlated with improved viral control following challenge with Gag-expressing vaccinia virus. Taken together, our studies offer evidence to support the use of PD-1/PD-L1 blockade as an adjuvant modality to enhance antigen-specific immune responses elicited by T cell-based immunizations such as DCLV.
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Abstract
The liver has vital metabolic and clearance functions that involve the uptake of nutrients, waste products and pathogens from the blood. In addition, its unique immunoregulatory functions mediated by local expression of co-inhibitory receptors and immunosuppressive mediators help to prevent inadvertent organ damage. However, these tolerogenic properties render the liver an attractive target site for pathogens. Although most pathogens that reach the liver via the blood are eliminated or controlled by local innate and adaptive immune responses, some pathogens (such as hepatitis viruses) can escape immune control and persist in hepatocytes, causing substantial morbidity and mortality worldwide. Here, we review our current knowledge of the mechanisms of liver targeting by pathogens and describe the interplay between pathogens and host factors that promote pathogen elimination and maintain organ integrity or that allow pathogen persistence.
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