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McKechnie JL, Beltrán D, Ferreira AMM, Vergara R, Saenz L, Vergara O, Estripeaut D, Araúz AB, Simpson LJ, Holmes S, López-Vergès S, Blish CA. Mass Cytometry Analysis of the NK Cell Receptor-Ligand Repertoire Reveals Unique Differences between Dengue-Infected Children and Adults. Immunohorizons 2020; 4:634-647. [PMID: 33067399 PMCID: PMC8608029 DOI: 10.4049/immunohorizons.2000074] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 09/24/2020] [Indexed: 12/05/2022] Open
Abstract
Dengue virus (DENV) is a significant cause of morbidity in many regions of the world, with children at the greatest risk of developing severe dengue. NK cells, characterized by their ability to rapidly recognize and kill virally infected cells, are activated during acute DENV infection. However, their role in viral clearance versus pathogenesis has not been fully elucidated. Our goal was to profile the NK cell receptor-ligand repertoire to provide further insight into the function of NK cells during pediatric and adult DENV infection. We used mass cytometry to phenotype isolate NK cells and PBMCs from a cohort of DENV-infected children and adults. Using unsupervised clustering, we found that pediatric DENV infection leads to a decrease in total NK cell frequency with a reduction in the percentage of CD56dimCD38bright NK cells and an increase in the percentage of CD56dimperforinbright NK cells. No such changes were observed in adults. Next, we identified markers predictive of DENV infection using a differential state test. In adults, NK cell expression of activation markers, including CD69, perforin, and Fas-L, and myeloid cell expression of activating NK cell ligands, namely Fas, were predictive of infection. In contrast, increased NK cell expression of the maturation marker CD57 and myeloid cell expression of inhibitory ligands, such as HLA class I molecules, were predictive of pediatric DENV infection. These findings suggest that acute pediatric DENV infection may result in diminished NK cell activation, which could contribute to enhanced pathogenesis and disease severity.
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Affiliation(s)
- Julia L. McKechnie
- Program in Immunology, Stanford University School of Medicine, Stanford, CA 94305
| | - Davis Beltrán
- Department of Research in Virology and Biotechnology, Gorgas Memorial Institute for Health Studies, Panama City, Panama
- Institute for Scientific Research and Technology Services, Panama City, Panama
- Department of Biotechnology, Acharya Nagarjuna University, Guntur 522002, India
| | | | - Rosemary Vergara
- Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305
| | - Lisseth Saenz
- Department of Research in Virology and Biotechnology, Gorgas Memorial Institute for Health Studies, Panama City, Panama
| | - Ofelina Vergara
- Hospital del Niño Doctor José Renán Esquivel, Panama City, Panama
| | - Dora Estripeaut
- Hospital del Niño Doctor José Renán Esquivel, Panama City, Panama
| | | | - Laura J. Simpson
- Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305
| | - Susan Holmes
- Department of Statistics, Stanford University, Stanford, CA 94305
| | - Sandra López-Vergès
- Department of Research in Virology and Biotechnology, Gorgas Memorial Institute for Health Studies, Panama City, Panama
- Institute for Scientific Research and Technology Services, Panama City, Panama
- Universidad de Panama, Panama City, Panama
| | - Catherine A. Blish
- Program in Immunology, Stanford University School of Medicine, Stanford, CA 94305
- Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305
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2
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Abstract
The continuous interactions between host and pathogens during their coevolution have shaped both the immune system and the countermeasures used by pathogens. Natural killer (NK) cells are innate lymphocytes that are considered central players in the antiviral response. Not only do they express a variety of inhibitory and activating receptors to discriminate and eliminate target cells but they can also produce immunoregulatory cytokines to alert the immune system. Reciprocally, several unrelated viruses including cytomegalovirus, human immunodeficiency virus, influenza virus, and dengue virus have evolved a multitude of mechanisms to evade NK cell function, such as the targeting of pathways for NK cell receptors and their ligands, apoptosis, and cytokine-mediated signaling. The studies discussed in this article provide further insights into the antiviral function of NK cells and the pathways involved, their constituent proteins, and ways in which they could be manipulated for host benefit.
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Affiliation(s)
- Mathieu Mancini
- Department of Human Genetics, McGill University, Montreal, Quebec H3A 0C7, Canada;,
- McGill University Research Centre on Complex Traits, McGill University, Montreal, Quebec H3G 0B1, Canada
| | - Silvia M. Vidal
- Department of Human Genetics, McGill University, Montreal, Quebec H3A 0C7, Canada;,
- McGill University Research Centre on Complex Traits, McGill University, Montreal, Quebec H3G 0B1, Canada
- Department of Medicine, McGill University, Montreal, Quebec H4A 3J1, Canada
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3
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Zhang J, Huang Y, Li L, Dong J, Liao M, Sun M. Transcriptome Analysis Reveals the Neuro-Immune Interactions in Duck Tembusu Virus-Infected Brain. Int J Mol Sci 2020; 21:ijms21072402. [PMID: 32244328 PMCID: PMC7177238 DOI: 10.3390/ijms21072402] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 03/28/2020] [Accepted: 03/28/2020] [Indexed: 12/24/2022] Open
Abstract
The duck Tembusu virus (DTMUV) is a mosquito-borne flavivirus. It causes severe symptoms of egg-drop, as well as neurological symptoms and brain damage in ducks. However, the specific molecular mechanisms of DTMUV-induced neurovirulence and host responses in the brain remain obscure. To better understand the host-pathogen and neuro-immune interactions of DTMUV infection, we conducted high-throughput RNA-sequencing to reveal the transcriptome profiles of DTMUV-infected duck brain. Totals of 117, 212, and 150 differentially expressed genes (DEGs) were identified at 12, 24, and 48 h post infection (hpi). Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses uncovered genes and pathways related to the nervous system and immune responses in duck brain. Neuro-related genes, including WNT3A, GATA3, and CHRNA6, were found to be significantly downregulated. RIG-I-like receptors (DHX58, IFIH1) and Toll-like receptors (TLR2 and TLR3) were activated, inducing the expression of 22 interferon stimulated genes (ISGs) and antigen-processing and -presenting genes (TAP1 and TAP2) in the brain. Our research provides comprehensive information for the molecular mechanisms of neuro-immune and host-pathogen interactions of DTMUV.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 2/genetics
- ATP Binding Cassette Transporter, Subfamily B, Member 2/metabolism
- ATP Binding Cassette Transporter, Subfamily B, Member 3/genetics
- Animals
- Brain/immunology
- Brain/metabolism
- Brain/pathology
- Brain/virology
- Ducks/genetics
- Ducks/immunology
- Flavivirus/immunology
- Flavivirus/pathogenicity
- Flavivirus Infections/immunology
- Flavivirus Infections/metabolism
- Flavivirus Infections/pathology
- Flavivirus Infections/veterinary
- GATA3 Transcription Factor/genetics
- GATA3 Transcription Factor/metabolism
- Gene Expression Profiling/veterinary
- Host-Pathogen Interactions/genetics
- Host-Pathogen Interactions/immunology
- Host-Pathogen Interactions/physiology
- Interferons/metabolism
- Neuroimmunomodulation/genetics
- Neuroimmunomodulation/immunology
- Receptors, Nicotinic/genetics
- Receptors, Nicotinic/metabolism
- Receptors, Retinoic Acid/genetics
- Receptors, Retinoic Acid/metabolism
- Toll-Like Receptors/genetics
- Toll-Like Receptors/metabolism
- Transcriptome
- Wnt3A Protein/genetics
- Wnt3A Protein/metabolism
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4
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Iraqi M, Edri A, Greenshpan Y, Kundu K, Bolel P, Cahana A, Ottolenghi A, Gazit R, Lobel L, Braiman A, Porgador A. N-Glycans Mediate the Ebola Virus-GP1 Shielding of Ligands to Immune Receptors and Immune Evasion. Front Cell Infect Microbiol 2020; 10:48. [PMID: 32211339 PMCID: PMC7068452 DOI: 10.3389/fcimb.2020.00048] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 01/24/2020] [Indexed: 12/14/2022] Open
Abstract
The Ebola Virus (EBOV) glycoprotein (GP) sterically shields cell-membrane ligands to immune receptors such as human leukocyte antigen class-1 (HLA-I) and MHC class I polypeptide-related sequence A (MICA), thus mediating immunity evasion. It was suggested that the abundant N-glycosylation of the EBOV-GP is involved in this steric shielding. We aimed to characterize (i) the GP N-glycosylation sites contributing to the shielding, and (ii) the effect of mutating these sites on immune subversion by the EBOV-GP. The two highly glycosylated domains of GP are the mucin-like domain (MLD) and the glycan cap domain (GCD) with three and six N-glycosylation sites, respectively. We mutated the N-glycosylation sites either in MLD or in GCD or in both domains. We showed that the glycosylation sites in both the MLD and GCD domains contribute to the steric shielding. This was shown for the steric shielding of either HLA-I or MICA. We then employed the fluorescence resonance energy transfer (FRET) method to measure the effect of N-glycosylation site removal on the distance in the cell membrane between the EBOV-GP and HLA-I (HLA.A*0201 allele). We recorded high FRET values for the interaction of CFP-fused HLA.A*0201 and YFP-fused EBOV-GP, demonstrating the very close distance (<10 nm) between these two proteins on the cell membrane of GP-expressing cells. The co-localization of HLA-I and Ebola GP was unaffected by the disruption of steric shielding, as the removal of N-glycosylation sites on Ebola GP revealed similar FRET values with HLA-I. However, these mutations directed to N-glycosylation sites had restored immune cell function otherwise impaired due to steric shielding over immune cell ligands by WT Ebola GP. Overall, we showed that the GP-mediated steric shielding aimed to impair immune function is facilitated by the N-glycans protruding from its MLD and GCD domains, but these N-glycans are not controlling the close distance between GP and its shielded proteins.
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Affiliation(s)
- Muhammed Iraqi
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Avishay Edri
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Yariv Greenshpan
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Kiran Kundu
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel.,National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Priyanka Bolel
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Avishag Cahana
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Aner Ottolenghi
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Roi Gazit
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Leslie Lobel
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Alex Braiman
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Angel Porgador
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel.,National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be'er Sheva, Israel
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5
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Petitdemange C, Maucourant C, Tarantino N, Rey J, Vieillard V. Glycogen synthetase kinase 3 inhibition drives MIC-A/B to promote cytokine production by human natural killer cells in Dengue virus type 2 infection. Eur J Immunol 2019; 50:342-352. [PMID: 31743425 DOI: 10.1002/eji.201948284] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 09/11/2019] [Accepted: 11/15/2019] [Indexed: 01/23/2023]
Abstract
Dengue virus (DENV) is the most widespread arbovirus worldwide and is responsible for major outbreaks. The host's immune response plays a crucial role in controlling this infection but might also contribute to the promotion of viral spread and immunopathology. In response to DENV infection, NK cells preferentially produce cytokines and are cytotoxic in the presence of specific antibodies. Here, we identified that DENV-2 inhibits glycogen synthase kinase 3 (GSK-3) activity to subsequently induce MHC class-1-related chain (MIC) A and MIC-B expression and IL-12 production in monocyte-derived DCs, independently of the STAT-3 pathway. The inhibition of GSK-3 by DENV-2 or small molecules induced MIC-A/B expression on monocyte-derived DCs, resulting in autologous NK cells of a specific increase in IFN-γ and TNF-α production, in the absence of direct cytotoxicity. Together, these findings identified GSK-3 as a regulator of MIC-A/B expression and suggested its role in DENV-2 infection to specifically induce cytokine production by NK cells.
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Affiliation(s)
- Caroline Petitdemange
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Sorbonne Université, UPMC, Paris, France
| | - Christopher Maucourant
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Sorbonne Université, UPMC, Paris, France
| | - Nadine Tarantino
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Sorbonne Université, UPMC, Paris, France
| | - Juliana Rey
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Sorbonne Université, UPMC, Paris, France
| | - Vincent Vieillard
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Sorbonne Université, UPMC, Paris, France
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6
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Dey L, Mukhopadhyay A. A Graph-Based Approach for Finding the Dengue Infection Pathways in Humans Using Protein-Protein Interactions. J Comput Biol 2019; 27:755-768. [PMID: 31486690 DOI: 10.1089/cmb.2019.0171] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Dengue virus (DENV) is one of the deadly arboviruses, which is primarily transmitted by Aedes aegypti, and causes dengue infection to the humans. According to WHO, every year around 390 million humans are affected by DENV, of which around 50 million deaths are reported. Knowledge of the various diseases caused by the DENV would greatly encourage to understand the infection mechanism and help to design new antiviral drug discovery. We propose a quasi-clique and quasi-biclique algorithm to classify infection gateway proteins of the human body and possible pathways of DENV leading to various diseases. For this, we have examined three networks, dengue-human protein-protein interaction network, human protein interaction network, and human proteins-disease association network. The prediction result states that DENV may lead to various diseases in the human body, including cancer, asthma, ulcerative colitis, multiple sclerosis, premature birth, and so on. Some of the results have recently been validated experimentally. This study may endow with potential targets for more effective anti-dengue remedial contribution.
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Affiliation(s)
- Lopamudra Dey
- Department of Computer Science and Engineering, Heritage Institute of Technology, Kolkata, India
| | - Anirban Mukhopadhyay
- Department of Computer Science and Engineering, University of Kalyani, Kalyani, India
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7
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McKechnie JL, Beltrán D, Pitti A, Saenz L, Araúz AB, Vergara R, Harris E, Lanier LL, Blish CA, López-Vergès S. HLA Upregulation During Dengue Virus Infection Suppresses the Natural Killer Cell Response. Front Cell Infect Microbiol 2019; 9:268. [PMID: 31396492 PMCID: PMC6663972 DOI: 10.3389/fcimb.2019.00268] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 07/10/2019] [Indexed: 11/13/2022] Open
Abstract
Dengue virus (DENV) is the most prevalent mosquito-borne virus in the world and a major cause of morbidity in the tropics and subtropics. Upregulation of HLA class I molecules has long been considered a feature of DENV infection, yet this has not been evaluated in the setting of natural infection. Natural killer (NK) cells, an innate immune cell subset critical for mounting an early response to viral infection, are inhibited by self HLA class I, suggesting that upregulation of HLA class I during DENV infection could dampen the NK cell response. Here we addressed whether upregulation of HLA class I molecules occurs during in vivo DENV infection and, if so, whether this suppresses the NK cell response. We found that HLA class I expression was indeed upregulated during acute DENV infection across multiple cell lineages in vivo. To better understand the role of HLA class I upregulation, we infected primary human monocytes, a major target of DENV infection, in vitro. Upregulation of total HLA class I is dependent on active viral replication and is mediated in part by cytokines and other soluble factors induced by infection, while upregulation of HLA-E occurs in the presence of replication-incompetent virus. Importantly, blocking DENV-infected monocytes with a pan-HLA class I Fab nearly doubles the frequency of degranulating NK cells, while blocking HLA-E does not significantly improve the NK cell response. These findings demonstrate that upregulation of HLA class I during DENV infection suppresses the NK cell response, potentially contributing to disease pathogenesis.
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Affiliation(s)
- Julia L. McKechnie
- Program in Immunology, Stanford University School of Medicine, Stanford, CA, United States
| | - Davis Beltrán
- Department of Research in Virology and Biotechnology, Gorgas Memorial Institute for Health Studies, Panama City, Panama
- Institute for Scientific Research and Technology Services (INDICASAT-AIP), Panama City, Panama
- Department of Biotechnology, Acharya Nagarjuna University, Guntur, India
| | - Arcelys Pitti
- Department of Research in Virology and Biotechnology, Gorgas Memorial Institute for Health Studies, Panama City, Panama
| | - Lisseth Saenz
- Department of Research in Virology and Biotechnology, Gorgas Memorial Institute for Health Studies, Panama City, Panama
| | | | - Rosemary Vergara
- Department of Medicine, Stanford University School of Medicine, Stanford, CA, United States
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, United States
| | - Lewis L. Lanier
- Department of Microbiology and Immunology and the Parker Institute for Cancer Immunotherapy, University of California, San Francisco, San Francisco, CA, United States
| | - Catherine A. Blish
- Program in Immunology, Stanford University School of Medicine, Stanford, CA, United States
- Department of Medicine, Stanford University School of Medicine, Stanford, CA, United States
| | - Sandra López-Vergès
- Department of Research in Virology and Biotechnology, Gorgas Memorial Institute for Health Studies, Panama City, Panama
- Institute for Scientific Research and Technology Services (INDICASAT-AIP), Panama City, Panama
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8
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Edri A, Shemesh A, Iraqi M, Matalon O, Brusilovsky M, Hadad U, Radinsky O, Gershoni-Yahalom O, Dye JM, Mandelboim O, Barda-Saad M, Lobel L, Porgador A. The Ebola-Glycoprotein Modulates the Function of Natural Killer Cells. Front Immunol 2018; 9:1428. [PMID: 30013549 PMCID: PMC6036185 DOI: 10.3389/fimmu.2018.01428] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 06/08/2018] [Indexed: 12/23/2022] Open
Abstract
The Ebola virus (EBOV) uses evasion mechanisms that directly interfere with host T-cell antiviral responses. By steric shielding of human leukocyte antigen class-1, the Ebola glycoprotein (GP) blocks interaction with T-cell receptors (TCRs), thus rendering T cells unable to attack virus-infected cells. It is likely that this mechanism could promote increased natural killer (NK) cell activity against GP-expressing cells by preventing the engagement of NK inhibitory receptors; however, we found that primary human NK cells were less reactive to GP-expressing HEK293T cells. This was manifested as reduced cytokine secretion, a reduction in NK degranulation, and decreased lysis of GP-expressing target cells. We also demonstrated reduced recognition of GP-expressing cells by recombinant NKG2D and NKp30 receptors. In accordance, we showed a reduced monoclonal antibody-based staining of NKG2D and NKp30 ligands on GP-expressing target cells. Trypsin digestion of the membrane-associated GP led to a recovery of the recognition of membrane-associated NKG2D and NKp30 ligands. We further showed that membrane-associated GP did not shield recognition by KIR2DL receptors; in accordance, GP expression by target cells significantly perturbed signal transduction through activating, but not through inhibitory, receptors. Our results suggest a novel evasion mechanism employed by the EBOV to specifically avoid the NK cell immune response.
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Affiliation(s)
- Avishay Edri
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.,National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Avishai Shemesh
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.,National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Muhammed Iraqi
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.,National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Omri Matalon
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Michael Brusilovsky
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.,National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Uzi Hadad
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.,National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Olga Radinsky
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.,National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Orly Gershoni-Yahalom
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.,National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - John M Dye
- U.S. Army Medical Research Institute of Infectious Diseases, Frederick, MD, United States
| | - Ofer Mandelboim
- The Lautenberg Center for General and Tumor Immunology, The BioMedical Research Institute Israel Canada of the Faculty of Medicine (IMRIC), The Hebrew University Hadassah Medical School, Jerusalem, Israel
| | - Mira Barda-Saad
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Leslie Lobel
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.,Department of Emerging and Reemerging Diseases and Special Pathogens Uganda Virus Research Institute (UVRI), Entebbe, Uganda
| | - Angel Porgador
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.,National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer Sheva, Israel
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9
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Dengue Virus Induces NK Cell Activation through TRAIL Expression during Infection. Mediators Inflamm 2017; 2017:5649214. [PMID: 29038620 PMCID: PMC5605866 DOI: 10.1155/2017/5649214] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 06/29/2017] [Accepted: 07/09/2017] [Indexed: 01/07/2023] Open
Abstract
Dengue is an acute febrile illness with a wide spectrum of signs and symptoms ranging from mild to severe forms characterized by plasma leakage that can be fatal. NK cells are one of the main effectors in early infection and may play an important role in dengue pathogenesis. We investigated NK cell involvement during dengue infection. A higher frequency of NK cell subsets and TRAIL+NK cells was found in mild DF cases when compared to that in severe cases or healthy donors. NK activation markers such as CD107a and TLR3 were upregulated in patients' cells compared to those in healthy donors. In addition, IL12 related to NK cell activation were upregulated in mild DF cases. In vitro PBMC culture models show that DENV-stimulated and IFNα-stimulated NK cells were able to express TRAIL, suggesting an indirect activation of cells, regarding TRAIL expression. Type I IFN receptor blockage on DENV-stimulated PBMCs showed TRAIL expression on NK cells is partially IFNα dependent. In addition, during PBMC stimulation, TRAIL expression on NK cells was inversely correlated with DENV-positive monocytes. Therefore, we observed DENV-induced activation of NK cell populations. A higher activation of NK cells would promote limited viral spread, resulting in decreased inflammatory response, contributing to protection against dengue severity.
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10
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Pazina T, Shemesh A, Brusilovsky M, Porgador A, Campbell KS. Regulation of the Functions of Natural Cytotoxicity Receptors by Interactions with Diverse Ligands and Alterations in Splice Variant Expression. Front Immunol 2017; 8:369. [PMID: 28424697 PMCID: PMC5371597 DOI: 10.3389/fimmu.2017.00369] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 03/14/2017] [Indexed: 12/11/2022] Open
Abstract
The natural cytotoxicity receptor (NCR) family is constituted by NKp46, NKp44, and NKp30 in humans, which are expressed mainly on natural killer (NK) cells and are encoded by the ncr1, ncr2, and ncr3 genes, respectively. NCRs have classically been defined as activating receptors that trigger cytotoxicity and cytokine responses by NK cells upon engaging with ligands on tumor cells. Several new findings, however, have challenged this model and identified alternative mechanisms regulating the function of NCRs. Recent reports indicate that ligand matters, since the interaction of NKp44 with distinct ligands on target cells can either activate or inhibit NK cells. Also, the NCRs have been found to interact with distinct specificities to various heparan sulfate glycosaminoglycans, which are complex polysaccharides found in extracellular matrix or on cell surface heparan sulfate proteoglycans (HSPGs). The NCRs can engage with HSPGs in trans as a co-ligand on the target cells or in cis on the NK cell surface to regulate receptor–ligand interactions and NK cell activation. A number of splice variants of ncr2 and ncr3 have also been identified, and a predominant expression of certain variants results in inhibitory signaling through NKp44 and NKp30. Several recent studies have found that the selective expression of some of these inhibitory splice variants can significantly influence outcome in the contexts of cancer, infection, and pregnancy. These findings establish that NCR functions are more diverse than originally thought, and better understanding of their splice variant expression profiles and ligand interactions are needed to establish their functional regulation in the context of human health.
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Affiliation(s)
- Tatiana Pazina
- Blood Cell Development and Function Program, Institute for Cancer Research, Fox Chase Cancer Center, Philadelphia, PA, USA.,Federal State Budgetary Scientific Institution "Institute of Experimental Medicine", St. Petersburg, Russia
| | - Avishai Shemesh
- Faculty of Health Sciences, The Shraga Segal Department of Microbiology, Immunology and Genetics, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Michael Brusilovsky
- Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Angel Porgador
- Faculty of Health Sciences, The Shraga Segal Department of Microbiology, Immunology and Genetics, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Kerry S Campbell
- Blood Cell Development and Function Program, Institute for Cancer Research, Fox Chase Cancer Center, Philadelphia, PA, USA
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11
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Gan CS, Lim PJ, Razif MFM, Yusof R, Othman S. Subversion of immunoproteasome subunit expression in dengue virus serotype 2-infected HepG2 cells. Rev Soc Bras Med Trop 2017; 50:99-103. [PMID: 28327809 DOI: 10.1590/0037-8682-0207-2016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 09/08/2016] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION: Infection with all serotypes of dengue virus (DV) results in augmented antigen presentation by MHC class I molecules. However, the upregulation of immunoproteasome subunits only results from infection with two serotypes. This study aims to elucidate changes in the expression of immunoproteasome subunits resulting from infection with DV, particularly DV serotype 2 (DV2). METHODS: HepG2 cells were grown in various culture milieu. Total cellular RNA and proteins were extracted and quantified. RESULTS: Results demonstrated sequestration of immunoproteasome subunits LMP2 and LMP7 in DV2-infected cells. CONCLUSIONS: This study provides insights into the mechanisms underlying immune evasion by DV.
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Affiliation(s)
- Chye Sheng Gan
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.,Drug Design and Development Research Group, University of Malaya, Kuala Lumpur, Malaysia
| | - Pei Jean Lim
- Institute of Graduate Studies, University of Malaya, Kuala Lumpur, Malaysia
| | | | - Rohana Yusof
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.,Drug Design and Development Research Group, University of Malaya, Kuala Lumpur, Malaysia
| | - Shatrah Othman
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.,Drug Design and Development Research Group, University of Malaya, Kuala Lumpur, Malaysia
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12
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Petitdemange C, Wauquier N, Devilliers H, Yssel H, Mombo I, Caron M, Nkoghé D, Debré P, Leroy E, Vieillard V. Longitudinal Analysis of Natural Killer Cells in Dengue Virus-Infected Patients in Comparison to Chikungunya and Chikungunya/Dengue Virus-Infected Patients. PLoS Negl Trop Dis 2016; 10:e0004499. [PMID: 26938618 PMCID: PMC4777550 DOI: 10.1371/journal.pntd.0004499] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 02/08/2016] [Indexed: 11/18/2022] Open
Abstract
Background Dengue virus (DENV) is the most prominent arbovirus worldwide, causing major epidemics in South-East Asia, South America and Africa. In 2010, a major DENV-2 outbreak occurred in Gabon with cases of patients co-infected with chikungunya virus (CHIKV). Although the innate immune response is thought to be of primordial importance in the development and outcome of arbovirus-associated pathologies, our knowledge of the role of natural killer (NK) cells during DENV-2 infection is in its infancy. Methodology We performed the first extensive comparative longitudinal characterization of NK cells in patients infected by DENV-2, CHIKV or both viruses. Hierarchical clustering and principal component analyses were performed to discriminate between CHIKV and DENV-2 infected patients. Principal Findings We observed that both activation and differentiation of NK cells are induced during the acute phase of infection by DENV-2 and CHIKV. Combinatorial analysis however, revealed that both arboviruses induced two different signatures of NK-cell responses, with CHIKV more associated with terminal differentiation, and DENV-2 with inhibitory KIRs. We show also that intracellular production of interferon-γ (IFN-γ) by NK cells is strongly stimulated in acute DENV-2 infection, compared to CHIKV. Conclusions/Significance Although specific differences were observed between CHIKV and DENV-2 infections, the significant remodeling of NK cell populations observed here suggests their potential roles in the control of both infections. Dengue fever is the most important arthropod-borne viral disease worldwide, affecting 50 to 100 million individuals annually. The clinical picture associated with acute dengue virus (DENV) infections ranges from classical febrile illness to life-threatening disease. The innate immunity is the first line of defense in the control of viral replication. In this article, we examine the particular role of natural killer (NK) cells in DENV infection at different time points after the onset of symptoms. This extensive study was performed in comparison with patients infected by Chikungunya virus (CHIKV), another major arbovirus transmitted by the same mosquito vectors, and co-infected CHIKV/DENV-2 patients. We observed that DENV2 and CHIKV induced different signatures of NK-cell responses suggesting specific roles in the control of both infections.
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Affiliation(s)
- Caroline Petitdemange
- Sorbonne Universités, UPMC Univ Paris 06, INSERM U1135, CNRS ERL8255, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Nadia Wauquier
- Sorbonne Universités, UPMC Univ Paris 06, INSERM U1135, CNRS ERL8255, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
- Metabiota, Inc., San Francisco, California, United States of America
| | - Hervé Devilliers
- Internal Medicine and Systemic Diseases Department, Dijon University Hospital, Dijon, France
| | - Hans Yssel
- Sorbonne Universités, UPMC Univ Paris 06, INSERM U1135, CNRS ERL8255, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Illich Mombo
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Mélanie Caron
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Dieudonné Nkoghé
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Patrice Debré
- Sorbonne Universités, UPMC Univ Paris 06, INSERM U1135, CNRS ERL8255, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Eric Leroy
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Vincent Vieillard
- Sorbonne Universités, UPMC Univ Paris 06, INSERM U1135, CNRS ERL8255, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
- * E-mail:
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13
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Guy B, Lang J, Saville M, Jackson N. Vaccination Against Dengue: Challenges and Current Developments. Annu Rev Med 2016; 67:387-404. [DOI: 10.1146/annurev-med-091014-090848] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bruno Guy
- Research and Development, Sanofi Pasteur, 69007 Lyon, France;
| | - Jean Lang
- Research and Development, Sanofi Pasteur, 69007 Lyon, France;
| | - Melanie Saville
- Research and Development, Sanofi Pasteur, 69007 Lyon, France;
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14
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Fernando AN, Malavige GN, Perera KLN, Premawansa S, Ogg GS, De Silva AD. Polymorphisms of Transporter Associated with Antigen Presentation, Tumor Necrosis Factor-α and Interleukin-10 and their Implications for Protection and Susceptibility to Severe Forms of Dengue Fever in Patients in Sri Lanka. J Glob Infect Dis 2016; 7:157-64. [PMID: 26752870 PMCID: PMC4693307 DOI: 10.4103/0974-777x.170501] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Context: To date, a clear understanding of dengue disease pathogenesis remains elusive. Some infected individuals display no symptoms while others develop severe life-threatening forms of the disease. It is widely believed that host genetic factors influence dengue severity. Aims: This study evaluates the relationship between certain polymorphisms and dengue severity in Sri Lankan patients. Settings and Design: Polymorphism studies are carried out on genes for; transporter associated with antigen presentation (TAP), promoter of tumor necrosis factor-α (TNF-α), and promoter of interleukin-10 (IL-10). In other populations, TAP1 (333), TAP2 (379), TNF-α (−308), and IL-10 (−1082, −819, −592) have been associated with dengue and a number of different diseases. Data have not been collected previously for these polymorphisms for dengue patients in Sri Lanka. Materials and Methods: The polymorphisms were typed by amplification refractory mutation system polymerase chain reaction in 107 dengue hemorrhagic fever (DHF) patients together with 62 healthy controls. Statistical Analysis Used: Pearson's Chi-square contingency table analysis with Yates′ correction. Results: Neither the TAP nor the IL-10 polymorphisms considered individually can define dengue disease outcome with regard to severity. However, the genotype combination, IL-10 (−592/−819/−1082) CCA/ATA was significantly associated with development of severe dengue in these patients, suggesting a risk factor to developing DHF. Also, identified is the genotype combination IL-10 (−592/−819/−1082) ATA/ATG which suggested a possibility for protection from DHF. The TNF-α (−308) GG genotype was also significantly associated with severe dengue, suggesting a significant risk factor. Conclusions: The results reported here are specific to the Sri Lankan population. Comparisons with previous reports imply that data may vary from population to population.
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Affiliation(s)
| | - Gathsaurie Neelika Malavige
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Sri Lanka; MRC Human Immnology Unit, Weatherall Institute of Molecular Medicine, Oxford, UK
| | | | - Sunil Premawansa
- Department of Zoology, Faculty of Science, University of Colombo, Sri Lanka
| | - Graham S Ogg
- MRC Human Immnology Unit, Weatherall Institute of Molecular Medicine, Oxford, UK
| | - Aruna Dharshan De Silva
- Genetech Research Institute, Colombo 08, Sri Lanka; Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA
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15
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Gan CS, Yusof R, Othman S. Different serotypes of dengue viruses differently regulate the expression of the host cell antigen processing machinery. Acta Trop 2015; 149:8-14. [PMID: 25981524 DOI: 10.1016/j.actatropica.2015.05.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 04/14/2015] [Accepted: 05/06/2015] [Indexed: 10/23/2022]
Abstract
Dengue virus (DV) infection demonstrates an intriguing virus-induced intracellular membrane alteration that results in the augmentation of major histocompatibility complex (MHC) class I-restricted antigen presentation. As oppose to its biological function in attracting CD8(+) T-cells, this phenomenon appears to facilitate the immune evasion. However, the molecular events that attribute to the dysregulation of the antigen presenting mechanism (APM) by DV remain obscure. In this study, we aimed to characterize the host cell APM upon infection with all serotypes of whole DV. Cellular RNA were isolated from infected cells and the gene expressions of LMP2, LMP7, TAP1, TAP2, TAPBP, CALR, CANX, PDIA3, HLA-A and HLA-B were analyzed via quantitative PCR. The profiles of the gene expression were further validated. We showed that all four DV serotypes modulate host APM at the proteasomal level with DV2 showing the most prominent expression profile.
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16
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Rowan AG, Suemori K, Fujiwara H, Yasukawa M, Tanaka Y, Taylor GP, Bangham CRM. Cytotoxic T lymphocyte lysis of HTLV-1 infected cells is limited by weak HBZ protein expression, but non-specifically enhanced on induction of Tax expression. Retrovirology 2014; 11:116. [PMID: 25499803 PMCID: PMC4282740 DOI: 10.1186/s12977-014-0116-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 11/27/2014] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Immunogenetic evidence indicates that cytotoxic T lymphocytes (CTLs) specific for the weak CTL antigen HBZ limit HTLV-1 proviral load in vivo, whereas there is no clear relationship between the proviral load and the frequency of CTLs specific for the immunodominant antigen Tax. In vivo, circulating HTLV-1-infected cells express HBZ mRNA in contrast, Tax expression is typically low or undetectable. To elucidate the virus-suppressing potential of CTLs targeting HBZ, we compared the ability of HBZ- and Tax-specific CTLs to lyse naturally-infected cells, by co-incubating HBZ- and Tax-specific CTL clones with primary CD4(+) T cells from HLA-matched HTLV-1-infected donors. We quantified lysis of infected cells, and tested whether specific virus-induced host cell surface molecules determine the susceptibility of infected cells to CTL-mediated lysis. RESULTS Primary infected cells upregulated HLA-A*02, ICAM-1, Fas and TRAIL-R1/2 in concert with Tax expression, forming efficient targets for both HTLV-1-specific CTLs and CTLs specific for an unrelated virus. We detected expression of HBZ mRNA (spliced isoform) in both Tax-expressing and non-expressing infected cells, and the HBZ26-34 epitope was processed and presented by cells transfected with an HBZ expression plasmid. However, when coincubated with primary cells, a high-avidity HBZ-specific CTL clone killed significantly fewer infected cells than were killed by a Tax-specific CTL clone. Finally, incubation with Tax- or HBZ-specific CTLs resulted in a significant decrease in the frequency of cells expressing high levels of HLA-A*02. CONCLUSIONS HTLV-1 gene expression in primary CD4(+) T cells non-specifically increases susceptibility to CTL lysis. Despite the presence of HBZ spliced-isoform mRNA, HBZ epitope presentation by primary cells is significantly less efficient than that of Tax.
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Affiliation(s)
- Aileen G Rowan
- Section of Virology, Department of Medicine, Imperial College London, London, W2 1PG, UK.
| | - Koichiro Suemori
- Department of Bioregulatory Medicine, Graduate School of Medicine, Ehime University, and Ehime University Proteomedicine Research Center, Toh-on city, Ehime, Japan.
| | - Hiroshi Fujiwara
- Department of Bioregulatory Medicine, Graduate School of Medicine, Ehime University, and Ehime University Proteomedicine Research Center, Toh-on city, Ehime, Japan.
| | - Masaki Yasukawa
- Department of Bioregulatory Medicine, Graduate School of Medicine, Ehime University, and Ehime University Proteomedicine Research Center, Toh-on city, Ehime, Japan.
| | - Yuetsu Tanaka
- Graduate School and Faculty of Medicine, University of the Ryukyus, Okinawa, Japan.
| | - Graham P Taylor
- Section of Virology, Department of Medicine, Imperial College London, London, W2 1PG, UK.
| | - Charles R M Bangham
- Section of Virology, Department of Medicine, Imperial College London, London, W2 1PG, UK.
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17
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Santos JJS, Cordeiro MT, Bertani GR, Marques ETA, Gil LHVG. A two-plasmid strategy for engineering a dengue virus type 3 infectious clone from primary Brazilian isolate. AN ACAD BRAS CIENC 2014; 86:1749-59. [PMID: 25590713 DOI: 10.1590/0001-3765201420130332] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 05/05/2014] [Indexed: 11/22/2022] Open
Abstract
Dengue infections represent one of the most prevalent arthropod-borne diseases worldwide, causing a wide spectrum of clinical outcomes. Engineered infectious clone is an important tool to study Dengue virus (DENV) biology. Functional full-length cDNA clones have been constructed for many positive-strand RNA viruses and have provided valuable tools for studying the molecular mechanisms involved in viral genome replication, virion assembly, virus pathogenesis and vaccine development. We report herein the successful development of an infectious clone from a primary Brazilian isolate of dengue virus 3 (DENV3) of the genotype III. Using a two-plasmid strategy, DENV3 genome was divided in two parts and cloned separately into a yeast-bacteria shuttle vector. All plasmids were assembled in yeast by homologous recombination technique and a full-length template for transcription was obtained by in vitro ligation of the two parts of the genome. Transcript-derived DENV3 is infectious upon transfection into BHK-21 cells and in vitro characterization confirmed its identity. Growth kinetics of transcript-derived DENV3 was indistinguishable from wild type DENV3. This system is a powerful tool that will help shed light on molecular features of DENV biology, as the relationship of specific mutations and DENV pathogenesis.
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Affiliation(s)
- Jefferson J S Santos
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães, FIOCRUZ, Recife, PE, Brasil
| | - Marli T Cordeiro
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães, FIOCRUZ, Recife, PE, Brasil
| | - Giovani R Bertani
- Departamento de Bioquímica, Universidade Federal de Pernambuco, Recife, PE, Brasil
| | - Ernesto T A Marques
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães, FIOCRUZ, Recife, PE, Brasil
| | - Laura H V G Gil
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães, FIOCRUZ, Recife, PE, Brasil
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18
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Petitdemange C, Wauquier N, Rey J, Hervier B, Leroy E, Vieillard V. Control of acute dengue virus infection by natural killer cells. Front Immunol 2014; 5:209. [PMID: 24860571 PMCID: PMC4026719 DOI: 10.3389/fimmu.2014.00209] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 04/27/2014] [Indexed: 02/02/2023] Open
Abstract
Dengue fever is the most important arthropod-borne viral disease worldwide, affecting 50–100 million individuals annually. The clinical picture associated with acute dengue virus (DENV) infections ranges from classical febrile illness to life-threatening disease. The innate immunity is the first line of defense in the control of viral replication. This review will examine the particular role of natural killer (NK) cells in DENV infection. Over recent years, our understanding of the interplay between NK cells and viral pathogenesis has improved significantly. NK cells express an array of inhibitory and activating receptors that enable them to detect infected targets while sparing normal cells, and to recruit adaptive immune cells. To date, the exact mechanism by which NK cells may contribute to the control of DENV infection remains elusive. Importantly, DENV has acquired mechanisms to evade NK cell responses, further underlining the relevance of these cells in pathophysiology. Hence, understanding how NK cells affect the outcome of DENV infection could benefit the management of this acute disease.
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Affiliation(s)
- Caroline Petitdemange
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Université Pierre et Marie Curie, Sorbonne Universités , Paris , France ; INSERM, U1135, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris) , Paris , France ; Centre International de Recherches Médicales de Franceville , Franceville , Gabon
| | - Nadia Wauquier
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Université Pierre et Marie Curie, Sorbonne Universités , Paris , France ; Metabiota Inc. , San Francisco, CA , USA
| | - Juliana Rey
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Université Pierre et Marie Curie, Sorbonne Universités , Paris , France
| | - Baptiste Hervier
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Université Pierre et Marie Curie, Sorbonne Universités , Paris , France ; INSERM, U1135, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris) , Paris , France
| | - Eric Leroy
- Centre International de Recherches Médicales de Franceville , Franceville , Gabon
| | - Vincent Vieillard
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Université Pierre et Marie Curie, Sorbonne Universités , Paris , France ; INSERM, U1135, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris) , Paris , France ; CNRS ERL8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris) , Paris , France
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19
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Beltrán D, López-Vergès S. NK Cells during Dengue Disease and Their Recognition of Dengue Virus-Infected cells. Front Immunol 2014; 5:192. [PMID: 24829565 PMCID: PMC4017149 DOI: 10.3389/fimmu.2014.00192] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 04/18/2014] [Indexed: 12/13/2022] Open
Abstract
The innate immune response, in addition to the B- and T-cell response, plays a role in protection against dengue virus (DENV) infection and the degree of disease severity. Early activation of natural killer (NK) cells and type-I interferon-dependent immunity may be important in limiting viral replication during the early stages of DENV infection and thus reducing subsequent pathogenesis. NK cells may also produce cytokines that reduce inflammation and tissue injury. On the other hand, NK cells are also capable of inducing liver injury at early-time points of DENV infection. In vitro, NK cells can kill antibody-coated DENV-infected cells through antibody-dependent cell-mediated cytotoxicity. In addition, NK cells may directly recognize DENV-infected cells through their activating receptors, although the increase in HLA class I expression may allow infected cells to escape the NK response. Recently, genome-wide association studies have shown an association between MICB and MICA, which encode ligands of the activating NK receptor NKG2D, and dengue disease outcome. This review focuses on recognition of DENV-infected cells by NK cells and on the regulation of expression of NK cell ligands by DENV.
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Affiliation(s)
- Davis Beltrán
- Department of Research in Virology and Biotechnology, Gorgas Memorial Institute for Health Studies , Panama City , Panama ; Institute for Scientific Research and Technology Services (INDICASAT-AIP) , Panama City , Panama ; Department of Biotechnology, Acharya Nagarjuna University , Guntur , India
| | - Sandra López-Vergès
- Department of Research in Virology and Biotechnology, Gorgas Memorial Institute for Health Studies , Panama City , Panama
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20
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Alagarasu K, Mulay A, Sarikhani M, Rashmika D, Shah P, Cecilia D. Profile of human leukocyte antigen class I alleles in patients with dengue infection from Western India. Hum Immunol 2013; 74:1624-8. [DOI: 10.1016/j.humimm.2013.08.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 07/01/2013] [Accepted: 08/10/2013] [Indexed: 10/26/2022]
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21
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Ye J, Zhu B, Fu ZF, Chen H, Cao S. Immune evasion strategies of flaviviruses. Vaccine 2012; 31:461-71. [PMID: 23153447 DOI: 10.1016/j.vaccine.2012.11.015] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 10/29/2012] [Accepted: 11/02/2012] [Indexed: 12/24/2022]
Abstract
Flavivirus is a genus of the family Flaviviridae. It includes West Nile virus (WNV), dengue virus (DENV), yellow fever virus (YFV), Japanese encephalitis virus (JEV), tick-borne encephalitis virus (TBEV), and several other viruses which lead to extensive morbidity and mortality in humans. To establish infection and replication in the hosts, flaviviruses have evolved a variety of strategies to modulate the host's immune responses. In this review, the strategies employed by flaviviruses to evade the innate and adaptive immunity of host are summarized based on current studies, with a major focus on the inhibition of interferon, complement, natural killer (NK) cell, B cell, and T cell responses. This review aims to provide an overview of the current understanding for the mechanisms used by flaviviruses to escape the host's immune response, which will facilitate the future studies on flavivirus pathogenesis and the development of anti-flavivirus therapeutics.
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Affiliation(s)
- Jing Ye
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
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22
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Fang X, Hu Z, Shang W, Zhu J, Xu C, Rao X. Genetic polymorphisms of molecules involved in host immune response to dengue virus infection. ACTA ACUST UNITED AC 2012; 66:134-46. [DOI: 10.1111/j.1574-695x.2012.00995.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 03/29/2012] [Accepted: 05/22/2012] [Indexed: 01/06/2023]
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23
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Yossef R, Rosental B, Appel MY, Hershkovitz O, Porgador A. Upregulation of MHC class I expression following dengue virus infection: the mechanism at the promoter level. Expert Rev Anti Infect Ther 2012; 10:285-7. [PMID: 22397562 DOI: 10.1586/eri.12.7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Unlike many other viruses that downregulate MHC class I expression on infected cell membranes, flaviviruses were reported to upregulate the MHC class I expression. Dengue virus was shown to induce HLA class I expression; however, the precise transcriptional mechanism that is used by the virus remains unclear. This article assessed the findings of a recently published report describing the mechanism used by dengue virus to induce HLA-A2 expression and characterizing the transcription factors that are involved. The study showed that p50/p65 and p65/65 NF-κB dimers bind to the class I regulatory complex within the HLA-A2 promoter. This finding and its significance for the design of possible antiviral therapeutic agents are discussed in this article.
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Affiliation(s)
- Rami Yossef
- The Shraga Segal Department of Microbiology and Immunology and the National Institute for Biotechnology in the Negev, Ben Gurion University of the Negev, Beer Sheva, Israel
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Brusilovsky M, Rosental B, Shemesh A, Appel MY, Porgador A. Human NK cell recognition of target cells in the prism of natural cytotoxicity receptors and their ligands. J Immunotoxicol 2012; 9:267-74. [PMID: 22524686 DOI: 10.3109/1547691x.2012.675366] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The matter of the pathogen- and cancer-associated ligands recognized by the Natural Cytotoxicity Receptors (NCRs) has been a subject of intense research ever since the identification of the NCRs more than 12 years ago by Alessandro and Lorenzo Moretta: NKp46 in 1997, NKp44 in 1998, and finally NKp30 in 1999. Expression patterns recognized by NCRs include pathogen-derived, pathogen-induced, and cancer-associated cellular 'self' ligands. Pathogen-exposed cells may exhibit both types of pathogen-associated ligands. Transformed cells, in contrast, exhibit only 'self' ligands which are derived from both the intracellular- and membrane-associated milieu of self molecules. These expression patterns allow for NCR-based NK cell discrimination between healthy and affected cells, in the realms of both pathogenic infection and potential tumorigenesis. The focus of this review is on the current knowledge regarding the identities of NCR ligands and the type of target cells expressing these ligands.
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Affiliation(s)
- Michael Brusilovsky
- The Shraga Segal Department of Microbiology and Immunology, Faculty of Health Sciences and the National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Othman S, Rahman NA, Yusof R. Induction of MHC Class I HLA-A2 promoter by dengue virus occurs at the NFκB binding domains of the Class I Regulatory Complex. Virus Res 2011; 163:238-45. [PMID: 22001567 DOI: 10.1016/j.virusres.2011.09.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 09/28/2011] [Accepted: 09/30/2011] [Indexed: 10/16/2022]
Abstract
Despite aggressive efforts in dengue research, the control of dengue diseases and discovery of therapeutics against them await complete elucidation of its complex immune-pathogenesis. Unlike many viruses that escape the host's immune responses by suppressing the major histocompatibility complex (MHC) Class I pathway, many Flaviviruses up-regulate the cell surface expression of MHC Class I complex. We recently reported MHC Class I HLA-A2 promoter activation by all serotypes of dengue virus (DV). The mechanism by which DV regulates this is further explored here in HepG2 human liver cell line. Using real-time PCR, evidence that, similar to infections by other Flaviviruses, DV infection has the ability to up-regulate the MHC Class I transcription and mRNA synthesis, is presented. The region responsive towards DV infection of all serotypes was mapped to the Class I Regulatory Complex (CRC) of the HLA-A2 promoter. Competition electrophoretic mobility shift assay (EMSA) with NFκB probe established the presence of specific DNA-protein complex in DV-infected nuclear extracts. Antibody-supershift assays identified the MHC Class I promoter activation by DV to occur through binding of p65/p50 heterodimers and p65 homodimers to κB1 and κB2 cis-acting elements, respectively, within the CRC, and not with the interferon consensus sequence (ICS). This study presents evidence of MHC Class I gene modulation by DV, hence providing a better understanding of dengue immune-pathogenesis that would consequently facilitate the discovery of antiviral therapeutics against dengue.
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Affiliation(s)
- Shatrah Othman
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
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Kelley JF, Kaufusi PH, Volper EM, Nerurkar VR. Maturation of dengue virus nonstructural protein 4B in monocytes enhances production of dengue hemorrhagic fever-associated chemokines and cytokines. Virology 2011; 418:27-39. [PMID: 21810535 DOI: 10.1016/j.virol.2011.07.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Revised: 04/25/2011] [Accepted: 07/03/2011] [Indexed: 11/19/2022]
Abstract
High levels of viremia and chemokines and cytokines underlie the progression of severe dengue disease. Dengue virus (DENV) preferentially infects peripheral blood monocytes, which secrete elevated levels of immunomediators in patients with severe disease. Further, DENV nonstructural proteins (NS) are capable of modifying intracellular signaling, including interferon inhibition. We demonstrate that peak secretions of immunomediators such as IL-6, IL-8, IP-10, TNFα or IFNγ in DENV-infected monocytes correlate with maximum virus production and NS4B and NS5 are primarily responsible for the induction of immunomediators. Furthermore, we demonstrate that sequential NS4AB processing initiated by the viral protease NS2B3(pro) and via the intermediate 2KNS4B significantly enhances immunomediator induction. While the 2K-signal peptide is not essential for immunomediator induction, it plays a synergistic role with NS4B. These data suggest that NS4B maturation is important during innate immune signaling in DENV-infected monocytes. Given similar NS4B topologies and polyprotein processing across flaviviruses, NS4B may be an attractive target for developing Flavivirus-wide therapeutic interventions.
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Affiliation(s)
- James F Kelley
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI 96813, USA
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Hertz T, Nolan D, James I, John M, Gaudieri S, Phillips E, Huang JC, Riadi G, Mallal S, Jojic N. Mapping the landscape of host-pathogen coevolution: HLA class I binding and its relationship with evolutionary conservation in human and viral proteins. J Virol 2011; 85:1310-21. [PMID: 21084470 PMCID: PMC3020499 DOI: 10.1128/jvi.01966-10] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Accepted: 11/09/2010] [Indexed: 12/24/2022] Open
Abstract
The high diversity of HLA binding preferences has been driven by the sequence diversity of short segments of relevant pathogenic proteins presented by HLA molecules to the immune system. To identify possible commonalities in HLA binding preferences, we quantify these using a novel measure termed "targeting efficiency," which captures the correlation between HLA-peptide binding affinities and the conservation of the targeted proteomic regions. Analysis of targeting efficiencies for 95 HLA class I alleles over thousands of human proteins and 52 human viruses indicates that HLA molecules preferentially target conserved regions in these proteomes, although the arboviral Flaviviridae are a notable exception where nonconserved regions are preferentially targeted by most alleles. HLA-A alleles and several HLA-B alleles that have maintained close sequence identity with chimpanzee homologues target conserved human proteins and DNA viruses such as Herpesviridae and Adenoviridae most efficiently, while all HLA-B alleles studied efficiently target RNA viruses. These patterns of host and pathogen specialization are both consistent with coevolutionary selection and functionally relevant in specific cases; for example, preferential HLA targeting of conserved proteomic regions is associated with improved outcomes in HIV infection and with protection against dengue hemorrhagic fever. Efficiency analysis provides a novel perspective on the coevolutionary relationship between HLA class I molecular diversity, self-derived peptides that shape T-cell immunity through ontogeny, and the broad range of viruses that subsequently engage with the adaptive immune response.
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Affiliation(s)
- Tomer Hertz
- Microsoft Research, One Microsoft Way, Redmond, Washington 98052, Institute for Immunology and Infectious Diseases, Royal Perth Hospital and Murdoch University, Murdoch 6150, Western Australia, Australia, School of Anatomy and Human Biology, Centre for Forensic Science, University of Western Australia, Australia, Fundación Ciencia para la Vida, Avenida Zañartu 1482, Ñuñoa, Santiago, Chile
| | - David Nolan
- Microsoft Research, One Microsoft Way, Redmond, Washington 98052, Institute for Immunology and Infectious Diseases, Royal Perth Hospital and Murdoch University, Murdoch 6150, Western Australia, Australia, School of Anatomy and Human Biology, Centre for Forensic Science, University of Western Australia, Australia, Fundación Ciencia para la Vida, Avenida Zañartu 1482, Ñuñoa, Santiago, Chile
| | - Ian James
- Microsoft Research, One Microsoft Way, Redmond, Washington 98052, Institute for Immunology and Infectious Diseases, Royal Perth Hospital and Murdoch University, Murdoch 6150, Western Australia, Australia, School of Anatomy and Human Biology, Centre for Forensic Science, University of Western Australia, Australia, Fundación Ciencia para la Vida, Avenida Zañartu 1482, Ñuñoa, Santiago, Chile
| | - Mina John
- Microsoft Research, One Microsoft Way, Redmond, Washington 98052, Institute for Immunology and Infectious Diseases, Royal Perth Hospital and Murdoch University, Murdoch 6150, Western Australia, Australia, School of Anatomy and Human Biology, Centre for Forensic Science, University of Western Australia, Australia, Fundación Ciencia para la Vida, Avenida Zañartu 1482, Ñuñoa, Santiago, Chile
| | - Silvana Gaudieri
- Microsoft Research, One Microsoft Way, Redmond, Washington 98052, Institute for Immunology and Infectious Diseases, Royal Perth Hospital and Murdoch University, Murdoch 6150, Western Australia, Australia, School of Anatomy and Human Biology, Centre for Forensic Science, University of Western Australia, Australia, Fundación Ciencia para la Vida, Avenida Zañartu 1482, Ñuñoa, Santiago, Chile
| | - Elizabeth Phillips
- Microsoft Research, One Microsoft Way, Redmond, Washington 98052, Institute for Immunology and Infectious Diseases, Royal Perth Hospital and Murdoch University, Murdoch 6150, Western Australia, Australia, School of Anatomy and Human Biology, Centre for Forensic Science, University of Western Australia, Australia, Fundación Ciencia para la Vida, Avenida Zañartu 1482, Ñuñoa, Santiago, Chile
| | - Jim C. Huang
- Microsoft Research, One Microsoft Way, Redmond, Washington 98052, Institute for Immunology and Infectious Diseases, Royal Perth Hospital and Murdoch University, Murdoch 6150, Western Australia, Australia, School of Anatomy and Human Biology, Centre for Forensic Science, University of Western Australia, Australia, Fundación Ciencia para la Vida, Avenida Zañartu 1482, Ñuñoa, Santiago, Chile
| | - Gonzalo Riadi
- Microsoft Research, One Microsoft Way, Redmond, Washington 98052, Institute for Immunology and Infectious Diseases, Royal Perth Hospital and Murdoch University, Murdoch 6150, Western Australia, Australia, School of Anatomy and Human Biology, Centre for Forensic Science, University of Western Australia, Australia, Fundación Ciencia para la Vida, Avenida Zañartu 1482, Ñuñoa, Santiago, Chile
| | - Simon Mallal
- Microsoft Research, One Microsoft Way, Redmond, Washington 98052, Institute for Immunology and Infectious Diseases, Royal Perth Hospital and Murdoch University, Murdoch 6150, Western Australia, Australia, School of Anatomy and Human Biology, Centre for Forensic Science, University of Western Australia, Australia, Fundación Ciencia para la Vida, Avenida Zañartu 1482, Ñuñoa, Santiago, Chile
| | - Nebojsa Jojic
- Microsoft Research, One Microsoft Way, Redmond, Washington 98052, Institute for Immunology and Infectious Diseases, Royal Perth Hospital and Murdoch University, Murdoch 6150, Western Australia, Australia, School of Anatomy and Human Biology, Centre for Forensic Science, University of Western Australia, Australia, Fundación Ciencia para la Vida, Avenida Zañartu 1482, Ñuñoa, Santiago, Chile
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Le Bouteiller P, Siewiera J, Casart Y, Aguerre-Girr M, El Costa H, Berrebi A, Tabiasco J, Jabrane-Ferrat N. The human decidual NK-cell response to virus infection: what can we learn from circulating NK lymphocytes? J Reprod Immunol 2011; 88:170-5. [PMID: 21277025 DOI: 10.1016/j.jri.2010.12.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Revised: 11/19/2010] [Accepted: 12/14/2010] [Indexed: 11/18/2022]
Abstract
NK cells present in the peripheral blood respond rapidly to pathogens or pathogen-infected cells by various means including cytotoxicity and production of cytokines. Whether decidual NK (dNK) cells are able to play a similar role when the pregnant uterus is infected by viruses is still largely unknown. Decidual NK cells are generally considered as poorly cytotoxic when compared to their peripheral blood counterparts. However, we have recently demonstrated that freshly isolated dNK cells from healthy early pregnant uterus do have a cytotoxic potential mediated by the specific engagement of NKp46 activating receptor. We further found that the co-engagement of CD94/NKG2A inhibiting receptor drastically inhibits the cytolytic function of dNK. This latter observation suggests that in situ the CD94/NKG2A receptor interaction with its HLA-E specific ligand is a dominant negative regulatory mechanism that prevents unwanted dNK cell cytotoxicity in non-infected pregnant uterus. How do dNK cells behave when they are activated by virus-infected cells present at the maternal-fetal interface? Largely based on data obtained from circulating NK cells, this review briefly discusses the following questions: Does uterine viral infection promote decidual NK cell proliferative capacity in situ? Are dNK cells able to kill virus-infected autologous decidual target cells and thus limit the virus spreading to the fetus? Which viral-mediated signal(s) and molecular interactions may subvert inhibition of dNK cytotoxic potential? Does uterine viral infection promote decidual NK cell secretion of cytokines and chemokines that boost the anti-viral immune response?
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Affiliation(s)
- Philippe Le Bouteiller
- Institut National de la Santé et de la Recherche Médicale, UMR 1043, Toulouse 31300, France.
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Othman S, Rahman NA, Yusof R. All serotypes of dengue virus induce HLA-A2 major histocompatibility complex class I promoter activity in human liver cells. Trans R Soc Trop Med Hyg 2010; 104:806-8. [DOI: 10.1016/j.trstmh.2010.07.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2010] [Revised: 07/21/2010] [Accepted: 07/21/2010] [Indexed: 11/25/2022] Open
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Lisnić VJ, Krmpotić A, Jonjić S. Modulation of natural killer cell activity by viruses. Curr Opin Microbiol 2010; 13:530-9. [PMID: 20558100 DOI: 10.1016/j.mib.2010.05.011] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Revised: 05/26/2010] [Accepted: 05/26/2010] [Indexed: 11/27/2022]
Abstract
Since their discovery, our understanding of NK cells has evolved from branding them marginal innate immunity cells to key players in anti-viral and anti-tumor immunity. Importance of NK cells in control of various viral infections is perhaps best illustrated by the existence of plethora of viral mechanisms aimed to modulate their function. These mechanisms include not only virally encoded immunoevasion proteins but also viral miRNA. Moreover, the evidence has been accumulated supporting the role of viral immunoevasion of NK cells in viral pathogenesis in vivo.
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Affiliation(s)
- Vanda Juranić Lisnić
- Department for Histology and Embryology and Center for Proteomics, Faculty of Medicine, University of Rijeka, B. Branchetta 20, 51000 Rijeka, Croatia
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Massé N, Davidson A, Ferron F, Alvarez K, Jacobs M, Romette JL, Canard B, Guillemot JC. Dengue virus replicons: Production of an interserotypic chimera and cell lines from different species, and establishment of a cell-based fluorescent assay to screen inhibitors, validated by the evaluation of ribavirin's activity. Antiviral Res 2010; 86:296-305. [DOI: 10.1016/j.antiviral.2010.03.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2009] [Revised: 03/08/2010] [Accepted: 03/16/2010] [Indexed: 10/19/2022]
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NKp46 O-glycan sequences that are involved in the interaction with hemagglutinin type 1 of influenza virus. J Virol 2010; 84:3789-97. [PMID: 20147410 DOI: 10.1128/jvi.01815-09] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Natural killer (NK) cells serve as a crucial first-line defense against tumors and virus-infected cells. We previously showed that lysis of influenza virus (IV)-infected cells is mediated by the interaction between the NK receptor, NKp46, and the IV hemagglutinin (HA) type 1 expressed by the infected cells. This interaction requires the presence of sialyl groups on the NKp46-T225 O-glycoforms. In the current study, we analyzed the O-glycan sequences that are imperative for the interaction between recombinant NKp46 (rNKp46) and IV H1N1 strains. We first showed that rNKp46 binding to IV H1N1 is not mediated by a glycoform unique to the Thr225 site. We then characterized the O-glycan sequences that mediate the interaction of rNKp46 and IV H1N1; we employed rNKp46s with dissimilar glycosylation patterns and IV H1N1 strains with different sialic acid alpha2,3 and alpha2,6 linkage preferences. The branched alpha2,3-sialylated O-glycoform Neu5NAcalpha2,3-Galbeta1,4-GlcNAcbeta1,6[Neu5NAcalpha2,3-Galbeta1,3]GalNAc competently mediated the interaction of rNKp46 with IV H1N1, manifesting a preference for alpha2,3 linkage. In contrast, the linear alpha2,3-sialylated O-glycoform Neu5NAcalpha2,3-Galbeta1,3-GalNAc was not correlated with enhanced interaction between rNKp46 and IV H1N1 or a preference for alpha2,3 linkage. The branched alpha2,3- and alpha2,6-sialylated O-glycoform Neu5NAcalpha2,3-Galbeta1,3[Neu5NAcalpha2,6]GalNAc competently mediated the interaction of rNKp46 with IV H1N1, manifesting a preference for alpha2,6 linkage. Previous viral HA-binding-specificity studies were performed with glycopolymer conjugates, free synthetic sialyl oligosaccharides, and sialidase-treated cells. This study shed light on the O-glycan sequences involved in the interaction of glycoprotein and viral hemagglutinins and may help in the design of agents inhibitory to hemagglutinin for influenza treatment.
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Hershkovitz O, Rosental B, Rosenberg LA, Navarro-Sanchez ME, Jivov S, Zilka A, Gershoni-Yahalom O, Brient-Litzler E, Bedouelle H, Ho JW, Campbell KS, Rager-Zisman B, Despres P, Porgador A. NKp44 receptor mediates interaction of the envelope glycoproteins from the West Nile and dengue viruses with NK cells. THE JOURNAL OF IMMUNOLOGY 2009; 183:2610-21. [PMID: 19635919 DOI: 10.4049/jimmunol.0802806] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Dengue virus (DV) and West Nile virus (WNV) have become a global concern due to their widespread distribution and their ability to cause a variety of human diseases. Antiviral immune defenses involve NK cells. In the present study, we investigated the interaction between NK cells and these two flaviviruses. We show that the NK-activating receptor NKp44 is involved in virally mediated NK activation through direct interaction with the flavivirus envelope protein. Recombinant NKp44 directly binds to purified DV and WNV envelope proteins and specifically to domain III of WNV envelope protein; it also binds to WNV virus-like particles. These WNV-virus-like particles and WNV-domain III of WNV envelope protein directly bind NK cells expressing high levels of NKp44. Functionally, interaction of NK cells with infective and inactivated WNV results in NKp44-mediated NK degranulation. Finally, WNV infection of cells results in increased binding of rNKp44 that is specifically inhibited by anti-WNV serum. WNV-infected target cells induce IFN-gamma secretion and augmented lysis by NKp44-expressing primary NK cells that are blocked by anti-NKp44 Abs. Our findings show that triggering of NK cells by flavivirus is mediated by interaction of NKp44 with the flavivirus envelope protein.
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Affiliation(s)
- Oren Hershkovitz
- Shraga Segal Department of Microbiology and Immunology and National Institute for Biotechnology in the Negev, Ben Gurion University of the Negev, Beer Sheva, Israel
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Demethylating treatment suppresses natural killer cell cytolytic activity. Mol Immunol 2009; 46:2064-70. [DOI: 10.1016/j.molimm.2009.02.033] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2008] [Accepted: 02/24/2009] [Indexed: 12/21/2022]
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Fernandez-Garcia MD, Mazzon M, Jacobs M, Amara A. Pathogenesis of flavivirus infections: using and abusing the host cell. Cell Host Microbe 2009; 5:318-28. [PMID: 19380111 DOI: 10.1016/j.chom.2009.04.001] [Citation(s) in RCA: 224] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Flaviviruses, such as the dengue virus and the West Nile virus, are emerging arthropod-borne viruses that represent an immense global health problem. Considerable progress has been made in understanding flavivirus structure and replication strategies, but only now are the complex molecular interactions between the virus and host cell starting to be unraveled. In this Review, we discuss the ongoing efforts toward elucidating the molecular mechanisms that allow flaviviruses to manipulate host cell functions for successful infection. We draw attention to the importance of these studies in defining the pathogenesis of flaviviral diseases.
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