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Piersma SJ. Tissue-specific features of innate lymphoid cells in antiviral defense. Cell Mol Immunol 2024:10.1038/s41423-024-01161-x. [PMID: 38684766 DOI: 10.1038/s41423-024-01161-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Accepted: 04/01/2024] [Indexed: 05/02/2024] Open
Abstract
Innate lymphocytes (ILCs) rapidly respond to and protect against invading pathogens and cancer. ILCs include natural killer (NK) cells, ILC1s, ILC2s, ILC3s, and lymphoid tissue inducer (LTi) cells and include type I, type II, and type III immune cells. While NK cells have been well recognized for their role in antiviral immunity, other ILC subtypes are emerging as players in antiviral defense. Each ILC subset has specialized functions that uniquely impact the antiviral immunity and health of the host depending on the tissue microenvironment. This review focuses on the specialized functions of each ILC subtype and their roles in antiviral immune responses across tissues. Several viruses within infection-prone tissues will be highlighted to provide an overview of the extent of the ILC immunity within tissues and emphasize common versus virus-specific responses.
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Affiliation(s)
- Sytse J Piersma
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, 63110, USA.
- Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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2
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Martín-Sierra C, Bravo MJ, Sáez ME, De Rojas I, Santos M, Martín-Carmona J, Corma-Gómez A, González-Serna A, Royo JL, Pineda JA, Rivero A, Rivero-Juárez A, Macías J, Real LM. The absence of seroconversion after exposition to hepatitis C virus is not related to KIR-HLA genotype combinations (GEHEP-012 study). Antiviral Res 2024; 222:105795. [PMID: 38181855 DOI: 10.1016/j.antiviral.2024.105795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 12/30/2023] [Accepted: 01/02/2024] [Indexed: 01/07/2024]
Abstract
BACKGROUND & AIMS It has been reported that specific killer-cell immunoglobulin-like receptors (KIRs) and HLA genotype combinations, such as KIR2DS4/HLA-C1 with presence of KIRDL2 or KIRDL3, homozygous KIRDL3/HLA-C1 and KIR3DL1/≥2HLA-Bw4, are strongly associated with the lack of active infection and seroconversion after exposition to hepatitis C virus (HCV). OBJECTIVE To determine whether these KIR-HLA combinations are relevant factors involved in that phenotype. PATIENTS AND METHODS In this retrospective case-control study, genotype data from a genome-wide association study previously performed on low susceptibility to HCV-infection carried out on 27 high-risk HCV-seronegative (HRSN) individuals and 743 chronically infected (CI) subjects were used. HLA alleles were imputed using R package HIBAG v1.2223 and KIR genotypes were imputed using the online resource KIR*IMP v1.2.0. RESULTS It was possible to successfully impute at least one KIR-HLA genotype combination previously associated with the lack of infection and seroconversion after exposition to HCV in a total of 23 (85.2%) HRSN individuals and in 650 (87.5%) CI subjects. No KIR-HLA genotype combination analyzed was related to the HRSN condition. CONCLUSIONS Our results suggest that those KIR-HLA genotype combinations are not relevant factors involved in the lack of infection and seroconversion after exposition to HCV. More studies will be needed to completely understand this phenotype.
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Affiliation(s)
- Carmen Martín-Sierra
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain; Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen de Valme /CSIC/Universidad de Sevilla, Sevilla, Spain
| | - María José Bravo
- Departamento de Especialidades Quirúrgicas, Bioquímica e Inmunología, Universidad de Málaga, Málaga, Spain
| | | | - Itziar De Rojas
- Research Center and Memory Clinic Fundació ACE, Institut Català de Neurociències Aplicades, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Marta Santos
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain; Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen de Valme /CSIC/Universidad de Sevilla, Sevilla, Spain
| | - Jesica Martín-Carmona
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain; Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen de Valme /CSIC/Universidad de Sevilla, Sevilla, Spain
| | - Anaïs Corma-Gómez
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain; Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen de Valme /CSIC/Universidad de Sevilla, Sevilla, Spain
| | - Alejandro González-Serna
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain; Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen de Valme /CSIC/Universidad de Sevilla, Sevilla, Spain; Departamento de Fisiología. Universidad de Sevilla, Sevilla, Spain
| | - José Luis Royo
- Departamento de Especialidades Quirúrgicas, Bioquímica e Inmunología, Universidad de Málaga, Málaga, Spain
| | - Juan A Pineda
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain; Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen de Valme /CSIC/Universidad de Sevilla, Sevilla, Spain; Departamento de Medicina. Universidad de Sevilla, Sevilla, Spain
| | - Antonio Rivero
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBC), Hospital Universitario Reina Sofía de Córdoba, Universidad de Córdoba, Córdoba, Spain
| | - Antonio Rivero-Juárez
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBC), Hospital Universitario Reina Sofía de Córdoba, Universidad de Córdoba, Córdoba, Spain
| | - Juan Macías
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain; Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen de Valme /CSIC/Universidad de Sevilla, Sevilla, Spain; Departamento de Medicina. Universidad de Sevilla, Sevilla, Spain
| | - Luis Miguel Real
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain; Instituto de Biomedicina de Sevilla, IBiS/Hospital Universitario Virgen de Valme /CSIC/Universidad de Sevilla, Sevilla, Spain; Departamento de Bioquímica Médica, Biología Molecular e Inmunología, Universidad de Sevilla, Sevilla, Spain.
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3
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Quinn JR, Goyal A, Ribeiro RM, Massaccesi G, Bailey JR, Thomas DL, Balagopal A. Antiretroviral therapy for HIV and intrahepatic hepatitis C virus replication. AIDS 2022; 36:337-346. [PMID: 34690280 PMCID: PMC9296270 DOI: 10.1097/qad.0000000000003116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE HIV alters host responses to hepatitis C virus (HCV). However, the impact of antiretroviral therapy (ART) on HCV is rarely understood in relevant tissues and never before within individual hepatocytes. DESIGN HIV and HCV kinetics were studied before and after ART initiation among 19 HIV/HCV co-infected persons. From five persons with the largest decline in plasma HCV RNA, liver tissues collected before and during ART, when plasma HIV RNA was undetectable, were studied. METHODS We used single-cell laser capture microdissection and quantitative PCR to assess intrahepatic HCV. Immunohistochemistry was performed to characterize intrahepatic immune cell populations. RESULTS Plasma HCV RNA declined by 0.81 (0.52-1.60) log10 IU/ml from a median (range) 7.26 (6.05-7.29) log10 IU/ml and correlated with proportions of HCV-infected hepatocytes (r = 0.89, P = 2 × 10-5), which declined from median (range) of 37% (6-49%) to 23% (0.5-52%) after plasma HIV clearance. Median (range) HCV RNA abundance within cells was unchanged in four of five participants. Liver T-cell abundance unexpectedly decreased, whereas natural killer (NK) and NK T-cell infiltration increased, correlating with changes in proportions of HCV-infected hepatocytes (r = -0.82 and r = -0.73, respectively). Hepatocyte expression of HLA-E, an NK cell restriction marker, correlated with proportions of HCV-infected hepatocytes (r = 0.79). CONCLUSION These are the first data to show that ART control of HIV reduces the intrahepatic burden of HCV. Furthermore, our data suggest that HIV affects the pathogenesis of HCV infection by an NK/NK T-cell-mediated mechanism that may involve HLA-E and can be rescued, at least in part, by ART.
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Affiliation(s)
| | - Ashish Goyal
- Los Alamos National Laboratory, Los Alamos, New Mexico, USA
| | - Ruy M Ribeiro
- Los Alamos National Laboratory, Los Alamos, New Mexico, USA
| | | | | | - David L Thomas
- The Johns Hopkins Medical Institutions, Baltimore, Maryland
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4
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Sugrue JA, O’Farrelly C. Uncovering Resistance to Hepatitis C Virus Infection: Scientific Contributions and Unanswered Questions in the Irish Anti-D Cohort. Pathogens 2022; 11:pathogens11030306. [PMID: 35335630 PMCID: PMC8953313 DOI: 10.3390/pathogens11030306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/20/2022] [Accepted: 02/24/2022] [Indexed: 02/04/2023] Open
Abstract
Infections caused inadvertently during clinical intervention provide valuable insight into the spectrum of human responses to viruses. Delivery of hepatitis C virus (HCV)-contaminated blood products in the 70s (before HCV was identified) have dramatically increased our understanding of the natural history of HCV infection and the role that host immunity plays in the outcome to viral infection. In Ireland, HCV-contaminated anti-D immunoglobulin (Ig) preparations were administered to approximately 1700 pregnant Irish rhesus-negative women in 1977–1979. Though tragic in nature, this outbreak (alongside a smaller episode in 1993) has provided unique insight into the host factors that influence outcomes after HCV exposure and the subsequent development of disease in an otherwise healthy female population. Despite exposure to highly infectious batches of anti-D, almost 600 of the HCV-exposed women have never shown any evidence of infection (remaining negative for both viral RNA and anti-HCV antibodies). Detailed analysis of these individuals may shed light on innate immune pathways that effectively block HCV infection and potentially inform us more generally about the mechanisms that contribute to viral resistance in human populations.
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Affiliation(s)
- Jamie A. Sugrue
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, D02R590 Dublin, Ireland
- Correspondence: (J.A.S.); (C.O.)
| | - Cliona O’Farrelly
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, D02R590 Dublin, Ireland
- School of Medicine, Trinity College Dublin, D02R590 Dublin, Ireland
- Correspondence: (J.A.S.); (C.O.)
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5
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Zaki MYW, Fathi AM, Samir S, Eldafashi N, William KY, Nazmy MH, Fathy M, Gill US, Shetty S. Innate and Adaptive Immunopathogeneses in Viral Hepatitis; Crucial Determinants of Hepatocellular Carcinoma. Cancers (Basel) 2022; 14:1255. [PMID: 35267563 PMCID: PMC8909759 DOI: 10.3390/cancers14051255] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 02/01/2022] [Accepted: 02/04/2022] [Indexed: 02/08/2023] Open
Abstract
Viral hepatitis B (HBV) and hepatitis C (HCV) infections remain the most common risk factors for the development of hepatocellular carcinoma (HCC), and their heterogeneous distribution influences the global prevalence of this common type of liver cancer. Typical hepatitis infection elicits various immune responses within the liver microenvironment, and viral persistence induces chronic liver inflammation and carcinogenesis. HBV is directly mutagenic but can also cause low-grade liver inflammation characterized by episodes of intermittent high-grade liver inflammation, liver fibrosis, and cirrhosis, which can progress to decompensated liver disease and HCC. Equally, the absence of key innate and adaptive immune responses in chronic HCV infection dampens viral eradication and induces an exhausted and immunosuppressive liver niche that favors HCC development and progression. The objectives of this review are to (i) discuss the epidemiological pattern of HBV and HCV infections, (ii) understand the host immune response to acute and chronic viral hepatitis, and (iii) explore the link between this diseased immune environment and the development and progression of HCC in preclinical models and HCC patients.
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Affiliation(s)
- Marco Y. W. Zaki
- Department of Biochemistry, Faculty of Pharmacy, Minia University, Minia 61732, Egypt; (A.M.F.); (N.E.); (M.H.N.); (M.F.)
- National Institute for Health Research Birmingham Liver Biomedical Research Unit and Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham B15 2TT, UK
| | - Ahmed M. Fathi
- Department of Biochemistry, Faculty of Pharmacy, Minia University, Minia 61732, Egypt; (A.M.F.); (N.E.); (M.H.N.); (M.F.)
| | - Samara Samir
- Department of Biochemistry, Faculty of Pharmacy, Sohag University, Sohag 82524, Egypt;
| | - Nardeen Eldafashi
- Department of Biochemistry, Faculty of Pharmacy, Minia University, Minia 61732, Egypt; (A.M.F.); (N.E.); (M.H.N.); (M.F.)
| | - Kerolis Y. William
- Department of Internal Medicine, Faculty of Medicine, Cairo University, Cairo 12613, Egypt;
| | - Maiiada Hassan Nazmy
- Department of Biochemistry, Faculty of Pharmacy, Minia University, Minia 61732, Egypt; (A.M.F.); (N.E.); (M.H.N.); (M.F.)
| | - Moustafa Fathy
- Department of Biochemistry, Faculty of Pharmacy, Minia University, Minia 61732, Egypt; (A.M.F.); (N.E.); (M.H.N.); (M.F.)
| | - Upkar S. Gill
- Barts Liver Centre, Centre for Immunobiology, Barts & The London School of Medicine & Dentistry, QMUL, London E1 2AT, UK;
| | - Shishir Shetty
- National Institute for Health Research Birmingham Liver Biomedical Research Unit and Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham B15 2TT, UK
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6
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Zhu MZ, Huang J, Li M, Zhoua WJ, Yao ZM, Ji G, Zhang L. Integrated miRNA and mRNA analysis identified potential mechanisms and targets of qianggan extracts in preventing nonalcoholic steatohepatitis. WORLD JOURNAL OF TRADITIONAL CHINESE MEDICINE 2022. [DOI: 10.4103/wjtcm.wjtcm_48_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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7
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Zhu MZ, Huanga J, Lia M, Zhou WJ, Yao ZM, Ji G, Zhang L. Integrated miRNA and mRNA analysis identified potential mechanisms and targets of qianggan extracts in preventing nonalcoholic steatohepatitis. WORLD JOURNAL OF TRADITIONAL CHINESE MEDICINE 2022. [DOI: 10.4103/2311-8571.335135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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8
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Chaisri S, Jayaraman J, Mongkolsapaya J, Duangchinda T, Jumniansong A, Trowsdale J, Traherne JA, Leelayuwat C. KIR copy number variations in dengue-infected patients from northeastern Thailand. Hum Immunol 2022; 83:328-334. [DOI: 10.1016/j.humimm.2022.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 12/16/2021] [Accepted: 01/07/2022] [Indexed: 11/04/2022]
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9
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Senff T, Menne C, Cosmovici C, Lewis-Ximenez LL, Aneja J, Broering R, Kim AY, Westendorf AM, Dittmer U, Scherbaum N, Lauer GM, Timm J. Peripheral blood iNKT cell activation correlates with liver damage during acute hepatitis C. JCI Insight 2021; 7:155432. [PMID: 34905514 PMCID: PMC8855829 DOI: 10.1172/jci.insight.155432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 12/08/2021] [Indexed: 11/17/2022] Open
Abstract
Invariant NK T (iNKT) cells are implicated in viral clearance; however, their role in hepatitis C virus (HCV) infection remains controversial. Here, iNKT cells were studied during different stages of HCV infection. iNKT cells from patients with acute HCV infection and people who inject drugs (PWID) with chronic or spontaneously resolved HCV infection were characterized by flow cytometry. In a longitudinal analysis during acute HCV infection, frequencies of activated CD38+ iNKT cells reproducibly declined in spontaneously resolving patients, whereas they were persistently elevated in patients progressing to chronic infection. During the first year of infection, the frequency of activated CD38+ or CD69+ iNKT cells strongly correlated with alanine transaminase levels with particularly pronounced correlations in spontaneously resolving patients. Increased frequencies of activated iNKT cells in chronic HCV infection were confirmed in cross-sectional analyses of PWID with chronic or spontaneously resolved HCV infection; however, no apparent functional differences were observed with various stimulation protocols. Our data suggest that iNKT cells are activated during acute hepatitis C and that activation is sustained in chronic infection. The correlation between the frequency of activated iNKT cells and alanine transaminase may point toward a role of iNKT cells in liver damage.
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Affiliation(s)
- Tina Senff
- Institute of Virology, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany
| | - Christopher Menne
- Institute of Virology, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany
| | - Christine Cosmovici
- Institute of Virology, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany
| | | | - Jasneet Aneja
- Gastrointestinal Unit, Massachusetts General Hospital and Harvard Medical School, Boston, United States of America
| | - Ruth Broering
- Department of Gastroenterology and Hepatology, University Hospital, University Duisburg-Essen, Essen, Germany
| | - Arthur Y Kim
- Department of Medicine, Massachusetts General Hospital, Boston, United States of America
| | - Astrid M Westendorf
- Institute of Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Ulf Dittmer
- Institute of Virology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Norbert Scherbaum
- Department for Addiction Medicine and Addictive Behavior, LVR-Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Georg M Lauer
- Gastrointestinal Unit, Massachusetts General Hospital and Harvard Medical School, Boston, United States of America
| | - Jörg Timm
- Institute of Virology, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany
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10
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Papúchová H, Meissner TB, Li Q, Strominger JL, Tilburgs T. The Dual Role of HLA-C in Tolerance and Immunity at the Maternal-Fetal Interface. Front Immunol 2019; 10:2730. [PMID: 31921098 PMCID: PMC6913657 DOI: 10.3389/fimmu.2019.02730] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 11/07/2019] [Indexed: 12/20/2022] Open
Abstract
To establish a healthy pregnancy, maternal immune cells must tolerate fetal allo-antigens and remain competent to respond to infections both systemically and in placental tissues. Extravillous trophoblasts (EVT) are the most invasive cells of extra-embryonic origin to invade uterine tissues and express polymorphic Human Leucocyte Antigen-C (HLA-C) of both maternal and paternal origin. Thus, HLA-C is a key molecule that can elicit allogeneic immune responses by maternal T and NK cells and for which maternal-fetal immune tolerance needs to be established. HLA-C is also the only classical MHC molecule expressed by EVT that can present a wide variety of peptides to maternal memory T cells and establish protective immunity. The expression of paternal HLA-C by EVT provides a target for maternal NK and T cells, whereas HLA-C expression levels may influence how this response is shaped. This dual function of HLA-C requires tight transcriptional regulation of its expression to balance induction of tolerance and immunity. Here, we critically review new insights into: (i) the mechanisms controlling expression of HLA-C by EVT, (ii) the mechanisms by which decidual NK cells, effector T cells and regulatory T cells recognize HLA-C allo-antigens, and (iii) immune recognition of pathogen derived antigens in context of HLA-C.
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Affiliation(s)
- Henrieta Papúchová
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, United States
| | - Torsten B Meissner
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, United States.,Department of Surgery, Beth Israel Deaconess Medical Center, Boston, MA, United States
| | - Qin Li
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, United States
| | - Jack L Strominger
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, United States
| | - Tamara Tilburgs
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, United States.,Division of Immunobiology, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
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11
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Lunemann S, Langeneckert AE, Martrus G, Hess LU, Salzberger W, Ziegler AE, Löbl SM, Poch T, Ravichandran G, Sauter J, Schmidt AH, Schramm C, Oldhafer KJ, Altfeld M, Körner C. Human liver-derived CXCR6 + NK cells are predominantly educated through NKG2A and show reduced cytokine production. J Leukoc Biol 2019; 105:1331-1340. [PMID: 30779432 DOI: 10.1002/jlb.1ma1118-428r] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 02/01/2019] [Accepted: 02/10/2019] [Indexed: 01/16/2023] Open
Abstract
NK cells have been implicated to affect the outcome of numerous liver diseases. In particular, members of the killer-cell Ig-like receptor (KIR) family, predominantly expressed by NK cells, have been associated with the outcome of hepatitis C virus infection and clearance of hepatocellular carcinoma. Inhibitory KIRs tune NK cell function through interaction with HLA class I, a process termed education. Nevertheless, the impact of the hepatic environment on NK cell education is incompletely understood. Therefore, we investigated the composition and function of hepatic KIR-expressing NK cells. Matched PBMC and hepatic lymphocytes were isolated from 20 individuals undergoing liver surgery and subsequently phenotypically analyzed for expression of KIRs and markers for tissue residency using flow cytometry. NK cell function was determined by co-culturing NK cells with the target cell line 721.221 and subsequent assessment of CD107a, IFN-γ, and TNF-α expression. Liver-resident CXCR6+ /CD56Bright NK cells lacked KIRs and were predominantly educated through NKG2A, while CXCR6- /CD16+ NK cells expressed KIRs and resembled peripheral blood NK cells. Hepatic NK cells showed lower response rates compared to peripheral blood NK cells; in particular, CXCR6+ NK cells were hyporesponsive to stimulation with target cells. The high proportion of educated NK cells in both subsets indicates the importance of self-inhibitory receptors for the balance between maintenance of self-tolerance and functional readiness. However, the reduced functionality of hepatic NK cells may reflect the impact of the tolerogenic hepatic environment on NK cells irrespective of NK cell education.
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Affiliation(s)
- Sebastian Lunemann
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Annika E Langeneckert
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Gloria Martrus
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Leonard U Hess
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Wilhelm Salzberger
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Annerose E Ziegler
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Sebastian M Löbl
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Tobias Poch
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Gevitha Ravichandran
- Institute for Experimental Immunology and Hepatology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Alexander H Schmidt
- DKMS Gemeinnützige GmbH, Tübingen, Germany.,DKMS Life Science Lab GmbH, Dresden, Germany
| | - Christoph Schramm
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Martin Zeitz Center for Rare Diseases, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Karl J Oldhafer
- Department of General and Abdominal Surgery, Asklepios Hospital Barmbek, Semmelweis University of Medicine, Hamburg, Germany
| | - Marcus Altfeld
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Christian Körner
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
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12
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Shen Y, Li J, Wang SQ, Jiang W. Ambiguous roles of innate lymphoid cells in chronic development of liver diseases. World J Gastroenterol 2018; 24:1962-1977. [PMID: 29760540 PMCID: PMC5949710 DOI: 10.3748/wjg.v24.i18.1962] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/25/2018] [Accepted: 05/06/2018] [Indexed: 02/06/2023] Open
Abstract
Innate lymphoid cells (ILCs) are defined as a distinct arm of innate immunity. According to their profile of secreted cytokines and lineage-specific transcriptional factors, ILCs can be categorized into the following three groups: group 1 ILCs (including natural killer (NK) cells and ILC1s) are dependent on T-bet and can produce interferon-γ; group 2 ILCs (ILC2s) are dependent on GATA3 and can produce type 2 cytokines, including interleukin (IL)-5 and IL-13; and, group 3 ILCs (including lymphoid tissue-like cells and ILC3s) are dependent on RORγt and can produce IL-22 and IL-17. Collaborative with adaptive immunity, ILCs are highly reactive innate effectors that promptly orchestrate immunity, inflammation and tissue repair. Dysregulation of ILCs might result in inflammatory disorders. Evidence regarding the function of intrahepatic ILCs is emerging from longitudinal studies of inflammatory liver diseases wherein they exert both physiological and pathological functions, including immune homeostasis, defenses and surveillance. Their overall effect on the liver depends on the balance of their proinflammatory and antiinflammatory populations, specific microenvironment and stages of immune responses. Here, we review the current data about ILCs in chronic liver disease progression, to reveal their roles in different stages as well as to discuss their therapeutic potency as intervention targets.
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Affiliation(s)
- Yue Shen
- Department of Gastroenterology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Jing Li
- Department of Gastroenterology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Department of Gastroenterology, Tongji Hospital, Tongji University, Shanghai 200000, China
| | - Si-Qi Wang
- Department of Gastroenterology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Wei Jiang
- Department of Gastroenterology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
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13
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Shan Z, Huang J, Liao Q, Huang K, Wang M, Xu R, Tang X, Zhang W, Nelson K, Fu Y, Li C, Rong X. Association of killer cell immunoglobulin-like receptors with spontaneous clearance of hepatitis C virus in the Chinese population. Transfusion 2018; 58:1028-1035. [PMID: 29446443 DOI: 10.1111/trf.14527] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 12/04/2017] [Accepted: 12/14/2017] [Indexed: 01/20/2023]
Abstract
BACKGROUND Natural killer (NK) cells are critical components in innate immune response to viral infection. Killer cell immunoglobulin-like receptors (KIRs) are involved in regulating the balance of activation or inhibitory function of NK cells. However, the association of KIRs with the spontaneous clearance of hepatitis C virus (HCV) remains unclear in the Chinese population. STUDY DESIGN AND METHODS A total of 407 HCV-seropositive voluntary blood donors were recruited, including 203 with spontaneous viral clearance and 204 with chronic infection. The presence of KIR genes was detected individually by polymerase chain reaction with sequence-specific primers. Data of HLA and interleukin-28B (IL28B) genotypes were extracted from our previous study. RESULTS Our results showed that KIR2DL2, 2DS2, 2DL2/2DL3, and 2DL5A-/2DL5B+ were more frequent in subjects with HCV clearance than those with chronic infection (odds ratio [OR], 1.640, p = 0.034; OR, 1.664, p = 0.032; OR, 1.636, p = 0.040; and OR, 2.601, p = 0.012, respectively). Multivariate logistic regression analysis showed that KIR2DL5A-/2DL5B+ associated with HCV clearance (OR, 2.448, p = 0.027), independent of sex, IL28B, and other KIRs. In contrast, KIR2DL3/2DL3 (OR, 0.610, p = 0.034) as well as 2DL3/2DL3+HLA-C1 or C1C1 (OR, 0.580, p = 0.017; and OR, 0.639, p = 0.025, respectively) was found associated with chronic HCV infection. The presence of the homozygous KIR2DL3 with or without its HLA ligand increased the OR of developing chronic HCV infection in the context of IL28B. CONCLUSIONS In this study we identified KIR2DL5A-/2DL5B+ associated with HCV spontaneous clearance, while KIR2DL3/2DL3, 2DL3/2DL3+HLA-C1, or C1C1 associated with chronic infection. Our study highlighted the fact that the roles of KIR and KIR-HLA contributed to the control of HCV infection by innate immune responses.
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Affiliation(s)
| | | | | | | | | | | | - Xi Tang
- Department of Transfusion Medicine, School of Biotechnology, Southern Medical University; and
| | - Weiyun Zhang
- Department of Transfusion Medicine, School of Biotechnology, Southern Medical University; and
- Department of Laboratory Medicine, Guangzhou General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong, China
| | - Kenrad Nelson
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Yongshui Fu
- Guangzhou Blood Center
- Department of Transfusion Medicine, School of Biotechnology, Southern Medical University; and
| | - Chengyao Li
- Department of Transfusion Medicine, School of Biotechnology, Southern Medical University; and
| | - Xia Rong
- Guangzhou Blood Center
- Department of Transfusion Medicine, School of Biotechnology, Southern Medical University; and
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14
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Ow MM, Hegazy D, Warshow UM, Cramp ME. Enhanced natural killer cell activity is found in exposed uninfected recipients of hepatitis C-contaminated blood. J Viral Hepat 2018; 25:245-253. [PMID: 29063663 DOI: 10.1111/jvh.12810] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 09/04/2017] [Indexed: 12/17/2022]
Abstract
A minority of injecting drug users, termed exposed uninfected, are resistant to hepatitis C (HCV) infection despite repeated low-dose exposures. We identify for the first time a cohort of blood recipients who remained uninfected despite large-dose exposure to HCV-contaminated blood and characterize immune factors that may confer protection. Of 1340 blood recipients from the English Look Back database who were transfused HCV-contaminated blood, we identified 8 who remained uninfected. In these 8 exposed uninfecteds, we characterized their natural killer (NK) cell populations and HCV-specific T-cell responses. Findings were compared with 10 spontaneous resolvers of HCV infection, 10 patients with chronic HCV infection and 10 healthy controls. Exposed uninfecteds had significantly greater numbers of NK cells with the activating receptor NKp30+ on CD56bright and CD56dim subsets compared with other groups (P < .05). Following interleukin-2 activation, NK cells of exposed uninfecteds had enhanced cytotoxicity that positively correlated with NKp30 expression (P = .02). Differences in NKp80 and KIR2DL3 expression were also observed. HCV-specific T-cell responses were observed in some exposed uninfecteds but of low amplitude. Exposure without infection following transfusion of HCV-contaminated blood is a very rare phenomenon and suggests a high level of resistance to infection. Enhanced NK cell activation and killing, with weak HCV-specific T-cell responses, were observed many years after exposure in uninfected recipients and may contribute to protection from HCV acquisition, although additional protective factors are being sought in this important cohort.
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Affiliation(s)
- M M Ow
- Department of Medicine, University of Auckland, Auckland, New Zealand.,Hepatology Research Group, Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK
| | - D Hegazy
- Hepatology Research Group, Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK
| | - U M Warshow
- Hepatology Research Group, Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK
| | - M E Cramp
- Hepatology Research Group, Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK.,Southwest Liver Unit, Derriford Hospital, Plymouth Hospitals NHS Trust, Plymouth, UK
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15
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Shawa IT, Felmlee DJ, Hegazy D, Sheridan DA, Cramp ME. Exploration of potential mechanisms of hepatitis C virus resistance in exposed uninfected intravenous drug users. J Viral Hepat 2017; 24:1082-1088. [PMID: 28475247 DOI: 10.1111/jvh.12720] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 03/27/2017] [Indexed: 12/14/2022]
Abstract
A rare outcome following exposure to hepatitis C virus (HCV) is a lack of observable infection as clinically measured by HCV RNA- or HCV-recognizing antibodies. The population who exhibit this trait is termed exposed uninfected (EU). Increasing evidence has refined characterization of these individuals, distinct from those who become infected but spontaneously clear HCV. Study of the EU population is highly pertinent for the discovery of antiviral mechanisms of resistance that can reveal antiviral therapeutic strategies. This review provides an overview of similarities and differences of the EU population relative to spontaneous resolvers and the majority whom develop chronic HCV infection, and focusses on possible mechanisms of resistance including innate and adaptive immunity, genetics and lipid interactions.
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Affiliation(s)
- I T Shawa
- Hepatology Research Group, Institute of Translational and Stratified Medicine, , Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK
| | - D J Felmlee
- Hepatology Research Group, Institute of Translational and Stratified Medicine, , Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK
| | - D Hegazy
- Hepatology Research Group, Institute of Translational and Stratified Medicine, , Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK
| | - D A Sheridan
- Hepatology Research Group, Institute of Translational and Stratified Medicine, , Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK
| | - M E Cramp
- Hepatology Research Group, Institute of Translational and Stratified Medicine, , Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK
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16
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Thöns C, Senff T, Hydes TJ, Manser AR, Heinemann FM, Heinold A, Heilmann M, Kim AY, Uhrberg M, Scherbaum N, Lauer GM, Khakoo SI, Timm J. HLA-Bw4 80(T) and multiple HLA-Bw4 copies combined with KIR3DL1 associate with spontaneous clearance of HCV infection in people who inject drugs. J Hepatol 2017; 67:462-470. [PMID: 28412292 DOI: 10.1016/j.jhep.2017.03.040] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 03/16/2017] [Accepted: 03/31/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND & AIMS Natural killer (NK) cell function is regulated by inhibitory and activating receptors including killer cell immunoglobulin-like receptors (KIRs). Here, we analyzed the impact of different KIR/KIR-ligand genotypes on the outcome of hepatitis C virus (HCV) infection in people who inject drugs (PWID). METHODS KIR/KIR-ligand genotypes associated with spontaneous clearance of HCV infection were identified in a cohort of PWID from Germany (n=266) and further validated in a second anti-HCV positive cohort of PWID recruited in North America (n=342). NK cells of PWID and healthy donors were functionally characterized according to their KIR/KIR-ligand genotype by flow cytometry. RESULTS Multivariate logistic regression analysis revealed that KIR3DL1/HLA-Bw4 80(T) was associated with spontaneous clearance of HCV infection in PWID, which was confirmed in the PWID cohort from North America. Compared with PWID with detectable HCV RNA, the frequency of individuals with multiple HLA-Bw4 alleles was significantly higher in anti-HCV positive PWID with resolved HCV infection (29.7% vs. 15.2%; p=0.0229) and in anti-HCV seronegative PWID (39.2%; p=0.0006). KIR3DL1+ NK cells from HLA-Bw4 80(T)-positive PWID showed superior functionality compared to HLA-Bw4 80(I)-positive PWID. This differential impact was not observed in healthy donors; however, the HLA-Bw4 copy number strongly correlated with the functionality of KIR3DL1+ NK cells. CONCLUSIONS HLA-Bw4-80(T) and multiple HLA-Bw4 copies in combination with KIR3DL1 are associated with protection against chronic hepatitis C in PWID by distinct mechanisms. Better licensing of KIR3DL1+ NK cells in the presence of multiple HLA-Bw4 copies is beneficial prior to seroconversion whereas HLA-Bw4 80(T) may be beneficial during acute hepatitis C. Lay summary: Natural killer (NK) cells are part of the innate immune system and are regulated by a complex network of activating and inhibiting receptors. The regulating receptor-ligand pairs of an individual are genetically determined. Here, we identified a particular set of ligand and receptor genes that are associated with better functionality of NK cells and better outcome upon exposure to HCV in a high-risk group.
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Affiliation(s)
- Christine Thöns
- Institute for Virology, Heinrich Heine University, Medical Faculty, Düsseldorf, Germany
| | - Tina Senff
- Institute for Virology, Heinrich Heine University, Medical Faculty, Düsseldorf, Germany
| | - Theresa J Hydes
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, Hampshire, UK
| | - Angela R Manser
- Institute for Transplantation Diagnostics and Cell Therapeutics, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany
| | - Falko M Heinemann
- Institute for Transfusion Medicine, University of Duisburg-Essen, University Hospital, Essen, Germany
| | - Andreas Heinold
- Institute for Transfusion Medicine, University of Duisburg-Essen, University Hospital, Essen, Germany
| | - Martin Heilmann
- Department for Addiction Medicine and Addictive Behavior, LVR-Hospital Essen, Faculty of Medicine, University of Duisburg-Essen, Essen, Germany
| | - Arthur Y Kim
- Division of Infectious Diseases, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Markus Uhrberg
- Institute for Transplantation Diagnostics and Cell Therapeutics, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany
| | - Norbert Scherbaum
- Department for Addiction Medicine and Addictive Behavior, LVR-Hospital Essen, Faculty of Medicine, University of Duisburg-Essen, Essen, Germany
| | - Georg M Lauer
- Gastrointestinal Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Salim I Khakoo
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, Hampshire, UK
| | - Jörg Timm
- Institute for Virology, Heinrich Heine University, Medical Faculty, Düsseldorf, Germany.
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17
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Liu M, Zhang C. The Role of Innate Lymphoid Cells in Immune-Mediated Liver Diseases. Front Immunol 2017; 8:695. [PMID: 28659927 PMCID: PMC5468686 DOI: 10.3389/fimmu.2017.00695] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 05/29/2017] [Indexed: 12/17/2022] Open
Abstract
Innate lymphoid cells (ILCs) are a recently identified group of innate immune cells lacking antigen-specific receptors that can mediate immune responses and regulate tissue homeostasis and inflammation. ILCs comprise group 1 ILCs, group 2 ILCs, and group 3 ILCs. These ILCs usually localize at mucosal surfaces and combat pathogens by the rapid release of certain cytokines. However, the uncontrolled activation of ILCs can also lead to damaging inflammation, especially in the gut, lung, and skin. Although the physiological and pathogenic roles of ILCs in liver diseases have been attracting increasing attention recently, there has been no systematic review regarding the roles of ILCs in immune-mediated liver diseases. Here, we review the relationships between the ILC subsets and their functions in immune-mediated liver diseases, and discuss their therapeutic potential based on current knowledge about the functional roles of these cells in liver diseases.
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Affiliation(s)
- Meifang Liu
- School of Pharmaceutical Sciences, Institute of Immunopharmacology and Immunotherapy, Shandong University, Jinan, China
| | - Cai Zhang
- School of Pharmaceutical Sciences, Institute of Immunopharmacology and Immunotherapy, Shandong University, Jinan, China
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18
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Pollmann J, Rölle A, Hofmann M, Cerwenka A. Hepatitis C Virus and Human Cytomegalovirus-Natural Killer Cell Subsets in Persistent Viral Infections. Front Immunol 2017; 8:566. [PMID: 28567042 PMCID: PMC5434107 DOI: 10.3389/fimmu.2017.00566] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 04/27/2017] [Indexed: 12/17/2022] Open
Abstract
Hepatitis C virus (HCV) and human cytomegalovirus (HCMV) are prominent examples of RNA and DNA viruses, respectively, that establish a persistent infection in their host. HCV affects over 185 million patients worldwide, who are at high risk for developing liver fibrosis, liver cirrhosis, and ultimately hepatocellular carcinoma. Recent breakthroughs in HCV therapy, using direct-acting antivirals have provided the opportunity to monitor natural killer (NK) cells after clearance of a chronic infection. There is now increasing evidence that the individual NK cell repertoire before infection is predictive for the course of disease. HCMV affects the majority of the global population. While being asymptomatic in healthy individuals, HCMV represents a severe clinical challenge in immunocompromised patients. Both viral infections, HCV and HCMV, lead to long-lasting and profound alterations within the entire NK cell compartment. This review article, will discuss the diverse range of changes in the NK cell compartment as well as potential consequences for the course of disease.
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Affiliation(s)
- Julia Pollmann
- Research Group Innate Immunity, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Alexander Rölle
- Clinical Cooperation Unit Applied Tumor-Immunity, German Cancer Research Center (DKFZ), National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Maike Hofmann
- Faculty of Medicine, Department of Medicine II, University Hospital Freiburg, University of Freiburg, Freiburg im Breisgau, Germany
| | - Adelheid Cerwenka
- Research Group Innate Immunity, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Medical Faculty Mannheim, Division of Immunbiochemistry, University Heidelberg, Heidelberg, Germany
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19
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Krueger PD, Narayanan S, Surette FA, Brown MG, Sung SSJ, Hahn YS. Murine liver-resident group 1 innate lymphoid cells regulate optimal priming of anti-viral CD8+ T cells. J Leukoc Biol 2017; 101:329-338. [PMID: 27493244 PMCID: PMC6608037 DOI: 10.1189/jlb.3a0516-225r] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/19/2016] [Accepted: 07/20/2016] [Indexed: 12/20/2022] Open
Abstract
The liver contains 2 transcriptionally distinct group 1 ILC subsets: CD49a+ ILC1s and CD49b+ NK cells. However, little is known about how group 1 ILCs contribute to hepatic immune responses. Therefore, we characterized murine liver-resident group 1 ILCs and found that CD49a+ ILC1s express high levels of the inhibitory receptor NKG2A and localize near DCs in perivascular spaces surrounding the portal triads. Upon hepatic viral infection, NKG2A signaling in group 1 ILCs, especially in CD49a+ ILC1s, inhibits CXCL9 expression required for robust accumulation of IFN-γ+CD49b+ NK cells. As a consequence, NKG2A-/- mice showed increased numbers of IFN-γ-producing NK cells that preferentially activate liver CD103+ DCs, leading to the sustained proliferation of adoptively transferred, virus-specific CD8+ T cells. Collectively, these data suggest that group 1 ILCs play a role in maintaining the liver as a tolerogenic site by limiting the recruitment of peripheral NK cells during the early phase of viral infection. Furthermore, our findings implicate that the inhibition of NKG2A signaling on group 1 ILCs may be a novel vaccine strategy to induce robust CD8+ T cell responses against persistent liver pathogens.
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Affiliation(s)
- Peter D Krueger
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia, USA
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, USA
| | - Sowmya Narayanan
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia, USA
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, USA
| | - Fionna A Surette
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia, USA
| | - Michael G Brown
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia, USA
- Department of Medicine, University of Virginia, Charlottesville, Virginia, USA; and
| | - Sun-Sang J Sung
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia, USA
- Department of Medicine, University of Virginia, Charlottesville, Virginia, USA; and
- Center for Immunity, Inflammation and Regenerative Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Young S Hahn
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia, USA;
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, USA
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20
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Shen X, Fu B, Liu Y, Guo C, Ye Y, Sun R, Li J, Tian Z, Wei H. NKp30 + NK cells are associated with HBV control during pegylated-interferon-alpha-2b therapy of chronic hepatitis B. Sci Rep 2016; 6:38778. [PMID: 27941937 PMCID: PMC5150634 DOI: 10.1038/srep38778] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 11/14/2016] [Indexed: 12/23/2022] Open
Abstract
A pressing need exists for improved therapeutic options for chronic hepatitis B (CHB). Pegylated-interferon-alpha (Peg-IFN-α) achieves sustained off-treatment responses in many cases because of its direct anti-viral effects and regulation of the immune response. However, non-responsiveness to Peg-IFN-α is frequent, and the mechanism is poorly understood. In this study, we found that the frequency and absolute number of NKp30+ natural killer (NK) cells increased markedly, accompanied by enhanced CD107a and IFN-γ production, during Peg-IFN-α-2b monotherapy or combination therapy with adefovir dipivoxil in patients with CHB, especially in responders. The responders and non-responders differed in the frequency of polyfunctional IFN-γ+ CD107+ NK cells. In addition, the increase in NKp30+ NK cells was negatively correlated with the HBV viral load and plasma HBeAg. Moreover, it was found that IL-15 may contribute to the up-regulation of NKp30 on the NK cells, and this up-regulation was not induced in vitro by Peg-IFN-α-2b alone. However, in the non-responders, these NKp30+ NK cells were dysfunctional because of increased NKG2A expression, which partly explains the inactivation of NKp30+ NK cells and the reduced capacity of these cells to produce antiviral cytokines. These findings may provide a new mechanism to explain the variable efficacy of Peg-IFN-α-2b therapy.
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Affiliation(s)
- Xiaokun Shen
- Institute of Immunology and the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Binqing Fu
- Institute of Immunology and the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, Anhui 230027, China
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Yanyan Liu
- Department of Infectious Diseases, First Affiliated Hospital of Anhui Medical University and Chaohu Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Chuang Guo
- Institute of Immunology and the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Ying Ye
- Department of Infectious Diseases, First Affiliated Hospital of Anhui Medical University and Chaohu Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Rui Sun
- Institute of Immunology and the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, Anhui 230027, China
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Jiabin Li
- Department of Infectious Diseases, First Affiliated Hospital of Anhui Medical University and Chaohu Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Zhigang Tian
- Institute of Immunology and the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, Anhui 230027, China
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China
| | - Haiming Wei
- Institute of Immunology and the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, Anhui 230027, China
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China
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21
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Hartling HJ, Ballegaard VC, Nielsen NS, Gaardbo JC, Nielsen SD. Immune regulation in chronic hepatitis C virus infection. Scand J Gastroenterol 2016; 51:1387-97. [PMID: 27436030 DOI: 10.3109/00365521.2016.1170875] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The immunological result of infection with Hepatitis C virus (HCV) depends on the delicate balance between a vigorous immune response that may clear the infection, but with a risk of unspecific inflammation and, or a less inflammatory response that leads to chronic infection. In general, exhaustion and impairment of cytotoxic function of HCV-specific T cells and NK cells are found in patients with chronic HCV infection. In contrast, an increase in immune regulatory functions is found primarily in form of increased IL-10 production possibly due to increased level and function of anti-inflammatory Tregs. Thus, the major immune players during chronic HCV infection are characterized by a decrease of cytotoxic function and increase of inhibitory functions. This may be an approach to diminish intrahepatic and systemic inflammation. Finally, there has been increasing awareness of regulatory functions of epigenetic changes in chronic HCV infection. A vast amount of studies have revealed the complexity of immune regulation in chronic HCV infection, but the interplay between immune regulation in virus and host remains incompletely understood. This review provides an overview of regulatory functions of HCV-specific T cells, NK cells, Tregs, IL-10, and TGF-β, as well as epigenetic changes in the setting of chronic HCV infection.
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Affiliation(s)
- Hans Jakob Hartling
- a Viro-Immunology Research Unit, Department of Infectious Diseases , University of Copenhagen , Rigshospitalet , Denmark
| | - Vibe Cecilie Ballegaard
- a Viro-Immunology Research Unit, Department of Infectious Diseases , University of Copenhagen , Rigshospitalet , Denmark
| | - Nick Schou Nielsen
- a Viro-Immunology Research Unit, Department of Infectious Diseases , University of Copenhagen , Rigshospitalet , Denmark
| | - Julie Christine Gaardbo
- a Viro-Immunology Research Unit, Department of Infectious Diseases , University of Copenhagen , Rigshospitalet , Denmark
| | - Susanne Dam Nielsen
- a Viro-Immunology Research Unit, Department of Infectious Diseases , University of Copenhagen , Rigshospitalet , Denmark
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22
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Heim MH, Bochud PY, George J. Host - hepatitis C viral interactions: The role of genetics. J Hepatol 2016; 65:S22-S32. [PMID: 27641986 DOI: 10.1016/j.jhep.2016.07.037] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 07/29/2016] [Accepted: 07/29/2016] [Indexed: 12/15/2022]
Abstract
Hepatitis C virus (HCV) is a major cause of chronic viral hepatitis that can lead to cirrhosis and hepatocellular carcinoma. Only a minority of patients can clear the virus spontaneously. Elimination of HCV during acute infection correlates with a rapid induction of innate, especially interferon (IFN)-induced genes, and a delayed induction of adaptive immune responses. There is a strong association between genetic variants in the IFNλ (IL28B) locus with the rate of spontaneous clearance. Individuals with the ancestral IFNλ4 allele capable of producing a fully active IFNλ4 are paradoxically not able to clear HCV in the acute phase and develop chronic hepatitis C (CHC) with more than 90% probability. In the chronic phase of HCV infection, the wild-type IFNλ4 genotype is strongly associated with an induction of hundreds of classical type I/type III IFN stimulated genes in hepatocytes. However, the activation of the endogenous IFN system in the liver is ineffective in clearing HCV, and is even associated with impaired therapeutic responses to pegylated (Peg)IFNα containing treatments. While the role of genetic variation in the IFNλ locus to the outcome of CHC treatment has declined, it is clear that variation not only at this locus, but also at other loci, modulate clinically important liver phenotypes, including inflammation, fibrosis progression and the development of hepatocellular cancer. In this review, we summarize current knowledge about the role of genetics in the host response to viral hepatitis and the potential future evolution of knowledge in understanding host-viral interactions.
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Affiliation(s)
- Markus H Heim
- Division of Gastroenterology and Hepatology, University Hospital Basel, Petersgraben 4, 4031 Basel, Switzerland; Department of Biomedicine, University of Basel, Hebelstrasse 20, 4031 Basel, Switzerland.
| | - Pierre-Yves Bochud
- Infectious Diseases Service, University Hospital and University of Lausanne, Rue du Bugnon 46, 1011 Lausanne-CHUV, Switzerland.
| | - Jacob George
- Storr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, NSW, Australia.
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23
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Lisovsky I, Isitman G, Tremblay-McLean A, Song R, DaFonseca S, Lebouchẻ B, Routy JP, Bruneau J, Bernard NF. The differential impact of natural killer (NK) cell education via KIR2DL3 and KIR3DL1 on CCL4 secretion in the context of in-vitro HIV infection. Clin Exp Immunol 2016; 186:336-346. [PMID: 27506421 DOI: 10.1111/cei.12849] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/02/2016] [Indexed: 11/30/2022] Open
Abstract
Carriage of certain inhibitory natural killer (NK) cell receptor (iNKR)/HLA ligand pairs is associated with protection from infection and slow time to AIDS implicating NK cells in HIV control. NK cells acquire functional potential through education, which requires the engagement of iNKRs by their human leucocyte antigen (HLA) ligands. HIV infection down-regulates cell surface HLA-A/B, but not HLA-C/E. We investigated how NK cell populations expressing combinations of the iNKRs NKG2A, KIR2DL3 (2DL3) and KIR3DL1 (3DL1) responded to autologous HIV infected CD4 (iCD4) cells. Purified NK cells from HIV-uninfected individuals were stimulated with autologous HIV iCD4 or uninfected CD4 T cells. Using flow cytometry we gated on each of the 8 NKG2A+/- 2DL3+/- 3DL1+/- populations and analysed all possible combinations of interferon (IFN)-γ, CCL4 and CD107a functional subsets responding to iCD4 cells. Infected CD4 cells induced differential frequencies of NKG2A+/- 2DL3+/- 3DL1+/- populations with total IFN-γ+ , CCL4+ and CD107a+ functional profiles. 2DL3+ NKG2A+ NK cells had a higher frequency of responses to iCD4 than other populations studied. A higher frequency of 2DL3+ NK cells responded to iCD4 from individuals that were not HLA-C1 homozygotes. These results show that 2DL3+ NK cells are mediators of HIV-specific responses. Furthermore, responses of NK cell populations to iCD4 are influenced not only by NK cell education through specific KIR/HLA pairs, but also by differential HIV-mediated changes in HLA expression.
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Affiliation(s)
- I Lisovsky
- Research Institute of the McGill University Health Centre (MUHC), Montreal, Quebec, Canada.,Division of Experimental Medicine, McGill University, Montreal, Quebec, Canada
| | - G Isitman
- Research Institute of the McGill University Health Centre (MUHC), Montreal, Quebec, Canada.,Division of Experimental Medicine, McGill University, Montreal, Quebec, Canada
| | - A Tremblay-McLean
- Research Institute of the McGill University Health Centre (MUHC), Montreal, Quebec, Canada.,Division of Experimental Medicine, McGill University, Montreal, Quebec, Canada
| | - R Song
- Research Institute of the McGill University Health Centre (MUHC), Montreal, Quebec, Canada.,Division of Experimental Medicine, McGill University, Montreal, Quebec, Canada
| | - S DaFonseca
- Research Institute of the McGill University Health Centre (MUHC), Montreal, Quebec, Canada
| | - B Lebouchẻ
- Research Institute of the McGill University Health Centre (MUHC), Montreal, Quebec, Canada.,Chronic Viral Illness Service, MUHC, Glen Site, Montreal, Quebec, Canada.,Department of Family Medicine, McGill University, Montreal, Quebec, Canada
| | - J-P Routy
- Division of Experimental Medicine, McGill University, Montreal, Quebec, Canada.,Chronic Viral Illness Service, MUHC, Glen Site, Montreal, Quebec, Canada.,Division of Hematology, MUHC, Glen Site, Montreal, Quebec, Canada
| | - J Bruneau
- Department of Family Medicine, Université de Montréal, Montreal, Quebec, Canada.,Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Quebec, Canada
| | - N F Bernard
- Research Institute of the McGill University Health Centre (MUHC), Montreal, Quebec, Canada.,Division of Experimental Medicine, McGill University, Montreal, Quebec, Canada.,Chronic Viral Illness Service, MUHC, Glen Site, Montreal, Quebec, Canada.,Division of Clinical Immunology, MUHC, Montreal, Quebec, Canada
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Nel I, Lucar O, Petitdemange C, Béziat V, Lapalus M, Bédossa P, Debré P, Asselah T, Marcellin P, Vieillard V. Accumulation of Intrahepatic TNF-α-Producing NKp44+ NK Cells Correlates With Liver Fibrosis and Viral Load in Chronic HCV Infection. Medicine (Baltimore) 2016; 95:e3678. [PMID: 27175704 PMCID: PMC4902546 DOI: 10.1097/md.0000000000003678] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
In the setting of chronic hepatitis C virus (HCV) infection, changes in natural killer (NK) cells have been shown to reflect activation in response to virus stimulation. The contribution of individual natural cytotoxicity receptors to HCV infection remains to be clarified. NKp44 is the sole specific natural cytotoxicity receptor expressed only on activated NK cells.In this study, peripheral blood and liver NK-cell subsets were purified from 31 patients with chronic C hepatitis or nonalcoholic steatohepatitis, and then characterized by flow cytometry. Their polyfunctional activity was determined by expression of the CD107a degranulation marker, together with intracellular cytokine production.Unlike the patients with nonalcoholic steatohepatitis, patients with chronic HCV infection had a higher frequency of NKp44 NK cells in the liver than in their peripheral blood (P < 0.0001). Intrahepatic NKp44 NK cells from HCV individuals produced higher levels of tumor necrosis factor-α than did NKp44 NK cells (P = 0.0011). Importantly, the frequency of intrahepatic NKp44 NK cells was correlated with both HCV-RNA levels (P = 0.0234) and stage of fibrosis (P = 0.0003).Our findings suggest that the accumulation of intrahepatic tumor necrosis factor-α-producing NKp44 resident NK cells play a role in the liver damage associated with chronic HCV infection.
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Affiliation(s)
- Isabelle Nel
- From the Sorbonne Universités (IN, OL, CP, VB, PD, VV), UPMC Univ Paris 06, INSERM U1135, CNRS ERL8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris; Univ Paris Diderot (ML), INSERM UMR 1149, CRI Paris Montmartre, Clichy; AP-HP (PB), Service d'Anatomie Pathologique; and AP-HP (TA, PM), Service d'Hépatologie, Hôpital Beaujon, Clichy, France
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25
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Strauss-Albee DM, Blish CA. Human NK Cell Diversity in Viral Infection: Ramifications of Ramification. Front Immunol 2016; 7:66. [PMID: 26973646 PMCID: PMC4776076 DOI: 10.3389/fimmu.2016.00066] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 02/12/2016] [Indexed: 12/21/2022] Open
Abstract
Natural killer (NK) cells are a unique lymphocyte lineage with remarkable agility in the rapid destruction of virus-infected cells. They are also the most poorly understood class of lymphocyte. A spectrum of activating and inhibitory receptors at the NK cell surface leads to an unusual and difficult-to-study mechanism of cellular recognition, as well as a very high capacity for diversity at the single-cell level. Here, we review the evidence for the role of NK cells in the earliest stage of human viral infection, and in its prevention. We argue that single-cell diversity is a logical evolutionary adaptation for their position in the immune response and contributes to their ability to kill virus-infected cells. Finally, we look to the future, where emerging single-cell technologies will enable a new generation of rigorous and clinically relevant studies on NK cells accounting for all of their unique and diverse characteristics.
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Affiliation(s)
- Dara M Strauss-Albee
- Stanford Immunology, Stanford University School of Medicine , Stanford, CA , USA
| | - Catherine A Blish
- Stanford Immunology, Stanford University School of Medicine, Stanford, CA, USA; Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
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26
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Abstract
Natural killer cells are a diverse group of innate lymphocytes that are specialized to rapidly respond to cancerous or virus-infected cells. NK cell function is controlled by the integration of signals from activating and inhibitory receptors expressed at the cell surface. Variegated expression patterns of these activating and inhibitory receptors at the single cell level leads to a highly diverse NK cell repertoire. Here I review the factors that influence NK cell repertoire diversity and its functional consequences for our ability to fight viruses.
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Affiliation(s)
- Catherine A. Blish
- Department of Medicine, Division of Infectious Diseases and Geographic Medicine
- Immunology Program, Stanford University School of Medicine, Stanford, California
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27
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Gardiner CM. NK cell function and receptor diversity in the context of HCV infection. Front Microbiol 2015; 6:1061. [PMID: 26483779 PMCID: PMC4588102 DOI: 10.3389/fmicb.2015.01061] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 09/14/2015] [Indexed: 12/14/2022] Open
Abstract
Hepatitis C virus (HCV) infects over 170 million people in the world. While a minority of individuals are able to naturally clear this hepatotropic virus using their immune system, most people go on to develop a lifetime chronic infection that can result in severe liver pathology, potentially leading to liver cirrhosis and hepatic cellular carcinoma. Investigations into acute immune responses and spontaneous clearance of the virus are severely hampered by difficulties in identification of relevant patient cohorts. While the role for the adaptive immune response in viral clearance is well established, it is becoming clear that the innate immune system also impacts on HCV outcome. The innate immune response to infection is likely to influence the type of adaptive immune response that develops and will ultimately influence if the virus is cleared or develops into a chronic infection. Natural Killer (NK) cells are lymphocytes that have important anti-viral functions including direct cytotoxicity of infected cells and the production of inflammatory cytokines, e.g., IFN-γ. They are generally considered to be cells of the innate immune system, although there is increasing evidence that NK cells adapt and persist in response to particular viral infections. NK cells are altered in patients with acute and chronic HCV infection. There is increasing evidence from both cellular and genetic studies that NK cells modulate HCV outcome. This review will describe and discuss the current experimental and clinical evidence of a role for NK cells in HCV infection and describe recent discoveries that are likely to play a role in future research.
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Affiliation(s)
- Clair M Gardiner
- NK Cell Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin Dublin, Ireland
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28
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Abstract
Natural killer (NK) cells are traditionally regarded as first-line effectors of the innate immune response, but they also have a distinct role in chronic infection. Here, we review the role of NK cells against hepatitis C virus (HCV) and hepatitis B virus (HBV), two agents that cause acute and chronic hepatitis in humans. Interest in NK cells was initially sparked by genetic studies that demonstrated an association between NK cell-related genes and the outcome of HCV infection. Viral hepatitis also provides a model to study the NK cell response to both endogenous and exogenous type I interferon (IFN). Levels of IFN-stimulated genes increase in both acute and chronic HCV infection and pegylated IFNα has been the mainstay of HCV and HBV treatment for decades. In chronic viral hepatitis, NK cells display decreased production of antiviral cytokines. This phenotype is found in both HCV and HBV infection but is induced by different mechanisms. Potent antivirals now provide the opportunity to study the reversibility of the suppressed cytokine production of NK cells in comparison with the antigen-induced defect in IFNγ and tumor necrosis factor-α production of virus-specific T cells. This has implications for immune reconstitution in other conditions of chronic inflammation and immune exhaustion, such as human immunodeficiency virus infection and cancer.
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Affiliation(s)
- Barbara Rehermann
- Correspondence Address correspondence to: Barbara Rehermann, MD, Immunology Section, Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, DHHS, Bethesda, Maryland 20892. fax: 301-402-0491.Immunology SectionLiver Diseases BranchNational Institute of Diabetes and Digestive and Kidney DiseasesNational Institutes of HealthDHHSBethesdaMaryland 20892
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29
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Affiliation(s)
- Jayajit Das
- Battelle Center for Mathematical Medicine; The Research Institute at the Nationwide Children's Hospital and the Departments of Pediatrics and Physics; The Ohio State University; Columbus OH USA
| | - Salim I. Khakoo
- Clinical and Experimental Sciences; Faculty of Medicine; University of Southampton; Southampton UK
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30
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Buchanan R, Hydes T, Khakoo SI. Innate and adaptive genetic pathways in HCV infection. TISSUE ANTIGENS 2015; 85:231-40. [PMID: 25708172 DOI: 10.1111/tan.12540] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Infection with hepatitis C virus (HCV) leads to a wide spectrum of clinical manifestations. This heterogeneity is underpinned by the host immune response and the genetic factors that govern it. Polymorphisms affecting both the innate and adaptive immunity determine the outcome of exposure. However the innate immune system appears to play a greater role in determining treatment-associated responses. Overall the effects of IFNL3/4 appear dominant over other polymorphic genes. Understanding how host genetics determines the disease phenotype has not been as intensively studied. This review summarizes our current understanding of innate and adaptive immunogenetic factors in the outcome of HCV infection. It focuses on how they relate to resolution and the progression of HCV-related liver disease, in the context of current and future treatment regimes.
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Affiliation(s)
- R Buchanan
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
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31
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Kuśnierczyk P, Mozer-Lisewska I, Zwolińska K, Kowala-Piaskowska AE, Bura M, Bereszyńska I, Pauli A, Żeromski J. Contribution of genes for killer cell immunoglobulin-like receptors (KIR) to the susceptibility to chronic hepatitis C virus infection and to viremia. Hum Immunol 2015; 76:102-8. [PMID: 25636579 DOI: 10.1016/j.humimm.2015.01.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 11/28/2014] [Accepted: 01/15/2015] [Indexed: 02/06/2023]
Abstract
BACKGROUND Natural killer (NK) cells are an important element of innate immunity against viruses, although their numbers decrease in the liver during chronic HCV infection. NK cells express a large panel of inhibitory and activating receptors. The most polymorphic of these are killer cell immunoglobulin-like receptors (KIRs) which are encoded by multiple genes that may be present or absent in given individuals depending on their genotype. This variability results in differential susceptibility to viral infections and diseases, including HCV infection and its consequences. AIMS AND METHODS The aim of this study was to test whether chronical infection with HCV and the viremia levels are associated with any KIR gene in the Polish population. We typed 301 chronically HCV-infected patients and 425 non-infected healthy individuals for the presence or absence of KIR genes and their ligands, HLA-C C1 and C2 groups as well as HLA-B and HLA-A Bw4-positive alleles. RESULTS We found that males, but not females, possessing KIR2DS2 and KIR2DL2 genes had a 1.7 higher probability to become chronically HCV-infected than males negative for these genes (p=0.0213). In accord with this, centromeric B region, containing KIR2DS2 and KIR2DL2 genes, was also associated with chronic HCV infection in males. In addition, patients of both genders possessing KIR2DS3 but not KIR2DS5 gene exhibited, on average, 2.6 lower level of viremia than HCV-infected individuals with other genotypes (p=0.00282). This was evident in those infected at a young age. KIR2DS3-positive patients also had lower mean levels of bilirubin than KIR2DS3-negative ones (p=0.02862). CONCLUSION Our results suggest a contribution of the KIR2DS2 and KIR2DL2 genes (cenB haplotype) to the susceptibility to chronic HCV infection, and an association of the KIR2DS3 gene in the absence of KIR2DS5 with low viremia levels.
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Affiliation(s)
- Piotr Kuśnierczyk
- Laboratory of Immunogenetics and Tissue Immunology, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wrocław, Poland.
| | - Iwona Mozer-Lisewska
- Chair and Department of Infectious Diseases, Karol Marcinkowski University of Medical Sciences, Poznań, Poland
| | - Katarzyna Zwolińska
- Laboratory of Virology, Department of Immunology of Infectious Diseases, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wrocław, Poland
| | | | - Maciej Bura
- Chair and Department of Infectious Diseases, Karol Marcinkowski University of Medical Sciences, Poznań, Poland
| | - Iwona Bereszyńska
- Chair and Department of Infectious Diseases, Karol Marcinkowski University of Medical Sciences, Poznań, Poland
| | - Anna Pauli
- Chair and Department of Infectious Diseases, Karol Marcinkowski University of Medical Sciences, Poznań, Poland
| | - Jan Żeromski
- Chair of Clinical Immunology, Karol Marcinkowski University of Medical Sciences, Poznań, Poland
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32
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Heim MH, Thimme R. Innate and adaptive immune responses in HCV infections. J Hepatol 2014; 61:S14-25. [PMID: 25443342 DOI: 10.1016/j.jhep.2014.06.035] [Citation(s) in RCA: 205] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 06/29/2014] [Accepted: 06/30/2014] [Indexed: 12/21/2022]
Abstract
Hepatitis C virus has been identified a quarter of a decade ago as a leading cause of chronic viral hepatitis that can lead to cirrhosis and hepatocellular carcinoma. Only a minority of patients can clear the virus spontaneously during acute infection. Elimination of HCV during acute infection correlates with a rapid induction of innate, especially interferon (IFN) induced genes, and a delayed induction of adaptive immune responses. However, the majority of patients is unable to clear the virus and develops viral persistence in face of an ongoing innate and adaptive immune response. The virus has developed several strategies to escape these immune responses. For example, to escape innate immunity, the HCV NS3/4A protease can efficiently cleave and inactivate two important signalling molecules in the sensory pathways that react to HCV pathogen-associated molecular patterns (PAMPs) to induce IFNs, i.e., the mitochondrial anti-viral signalling protein (MAVS) and the Toll-IL-1 receptor-domain-containing adaptor-inducing IFN-β (TRIF). Despite these escape mechanisms, IFN-stimulated genes (ISGs) are induced in a large proportion of patients with chronic infection. Of note, chronically HCV infected patients with constitutive IFN-stimulated gene (ISG) expression have a poor response to treatment with pegylated IFN-α (PegIFN-α) and ribavirin. The mechanisms that protect HCV from IFN-mediated innate immune reactions are not entirely understood, but might involve blockade of ISG protein translation at the ribosome, localization of viral replication to cell compartments that are not accessible to anti-viral IFN-stimulated effector systems, or direct antagonism of effector systems by viral proteins. Escape from adaptive immune responses can be achieved by emergence of viral escape mutations that avoid recognition by antibodies and T cells. In addition, chronic infection is characterized by the presence of functionally and phenotypically altered NK and T cell responses that are unable to clear the virus but most likely contribute to the ongoing liver disease. In this review, we will summarize current knowledge about the role of innate and adaptive immune responses in determining the outcome of HCV infection.
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Affiliation(s)
- Markus H Heim
- Division of Gastroenterology and Hepatology, University Hospital Basel, Petersgraben 4, 4031 Basel, Switzerland; Department of Biomedicine, University of Basel, Hebelstrasse 20, 4031 Basel, Switzerland.
| | - Robert Thimme
- Department of Medicine, Clinic for Gastroenterology, Hepatology, Endocrinology, Infectious Diseases, University Hospital Freiburg, Freiburg, Germany.
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John M, Gaudieri S. Influence of HIV and HCV on T cell antigen presentation and challenges in the development of vaccines. Front Microbiol 2014; 5:514. [PMID: 25352836 PMCID: PMC4195390 DOI: 10.3389/fmicb.2014.00514] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 09/12/2014] [Indexed: 12/11/2022] Open
Abstract
Some of the central challenges for developing effective vaccines against HIV and hepatitis C virus (HCV) are similar. Both infections are caused by small, highly mutable, rapidly replicating RNA viruses with the ability to establish long-term chronic pathogenic infection in human hosts. HIV has caused 60 million infections globally and HCV 180 million and both viruses may co-exist among certain populations by virtue of common blood-borne, sexual, or vertical transmission. Persistence of both pathogens is achieved by evasion of intrinsic, innate, and adaptive immune defenses but with some distinct mechanisms reflecting their differences in evolutionary history, replication characteristics, cell tropism, and visibility to mucosal versus systemic and hepatic immune responses. A potent and durable antibody and T cell response is a likely requirement of future HIV and HCV vaccines. Perhaps the single biggest difference between the two vaccine design challenges is that in HCV, a natural model of protective immunity can be found in those who resolve acute infection spontaneously. Such spontaneous resolvers exhibit durable and functional CD4+ and CD8+ T cell responses (Diepolder et al., 1995; Cooper et al., 1999; Thimme et al., 2001; Grakoui et al., 2003; Lauer et al., 2004; Schulze Zur Wiesch et al., 2012). However, frequent re-infection suggests partial or lack of protective immunity against heterologous HCV strains, possibly indicative of the degree of genetic diversity of circulating HCV genotypes and subtypes. There is no natural model of protective immunity in HIV, however, studies of “elite controllers,” or individuals who have durably suppressed levels of plasma HIV RNA without antiretroviral therapy, has provided the strongest evidence for CD8+ T cell responses in controlling viremia and limiting reservoir burden in established infection. Here we compare and contrast the specific mechanisms of immune evasion used by HIV and HCV, which subvert adaptive human leukocyte antigen (HLA)-restricted T cell immunity in natural infection, and the challenges these pose for designing effective preventative or therapeutic vaccines.
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Affiliation(s)
- Mina John
- Institute for Immunology and Infectious Diseases, Murdoch University Murdoch, WA, Australia ; Department of Clinical Immunology, PathWest Laboratory Medicine WA, Royal Perth Hospital Perth, WA, Australia
| | - Silvana Gaudieri
- Institute for Immunology and Infectious Diseases, Murdoch University Murdoch, WA, Australia ; School of Anatomy, Physiology and Human Biology, University of Western Australia Crawley, WA, Australia
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