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Mamidi MK, Huang J, Honjo K, Li R, Tabengwa EM, Neeli I, Randall NL, Ponnuchetty MV, Radic M, Leu CM, Davis RS. FCRL1 immunoregulation in B cell development and malignancy. Front Immunol 2023; 14:1251127. [PMID: 37822931 PMCID: PMC10562807 DOI: 10.3389/fimmu.2023.1251127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 09/01/2023] [Indexed: 10/13/2023] Open
Abstract
Immunotherapeutic targeting of surface regulatory proteins and pharmacologic inhibition of critical signaling pathways has dramatically shifted our approach to the care of individuals with B cell malignancies. This evolution in therapy reflects the central role of the B cell receptor (BCR) signaling complex and its co-receptors in the pathogenesis of B lineage leukemias and lymphomas. Members of the Fc receptor-like gene family (FCRL1-6) encode cell surface receptors with complex tyrosine-based regulation that are preferentially expressed by B cells. Among them, FCRL1 expression peaks on naïve and memory B cells and is unique in terms of its intracellular co-activation potential. Recent studies in human and mouse models indicate that FCRL1 contributes to the formation of the BCR signalosome, modulates B cell signaling, and promotes humoral responses. Progress in understanding its regulatory properties, along with evidence for its over-expression by mature B cell leukemias and lymphomas, collectively imply important yet unmet opportunities for FCRL1 in B cell development and transformation. Here we review recent advances in FCRL1 biology and highlight its emerging significance as a promising biomarker and therapeutic target in B cell lymphoproliferative disorders.
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Affiliation(s)
- Murali K. Mamidi
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Jifeng Huang
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Kazuhito Honjo
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Ran Li
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Edlue M. Tabengwa
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Indira Neeli
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Nar’asha L. Randall
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Manasa V. Ponnuchetty
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Marko Radic
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Chuen-Miin Leu
- Institute of Microbiology and Immunology, National Yang Ming ChiaoTung University, Taipei, Taiwan
| | - Randall S. Davis
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
- Departments of Microbiology, and Biochemistry & Molecular Genetics, University of Alabama at Birmingham, Birmingham, AL, United States
- O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, United States
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2
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Tamura T, Cheng C, Chen W, Merriam LT, Athar H, Kim YH, Manandhar R, Amir Sheikh MD, Pinilla-Vera M, Varon J, Hou PC, Lawler PR, Oldham WM, Seethala RR, Tesfaigzi Y, Weissman AJ, Baron RM, Ichinose F, Berg KM, Bohula EA, Morrow DA, Chen X, Kim EY. Single-cell transcriptomics reveal a hyperacute cytokine and immune checkpoint axis after cardiac arrest in patients with poor neurological outcome. MED 2023; 4:432-456.e6. [PMID: 37257452 PMCID: PMC10524451 DOI: 10.1016/j.medj.2023.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 03/06/2023] [Accepted: 05/02/2023] [Indexed: 06/02/2023]
Abstract
BACKGROUND Most patients hospitalized after cardiac arrest (CA) die because of neurological injury. The systemic inflammatory response after CA is associated with neurological injury and mortality but remains poorly defined. METHODS We determine the innate immune network induced by clinical CA at single-cell resolution. FINDINGS Immune cell states diverge as early as 6 h post-CA between patients with good or poor neurological outcomes 30 days after CA. Nectin-2+ monocyte and Tim-3+ natural killer (NK) cell subpopulations are associated with poor outcomes, and interactome analysis highlights their crosstalk via cytokines and immune checkpoints. Ex vivo studies of peripheral blood cells from CA patients demonstrate that immune checkpoints are a compensatory mechanism against inflammation after CA. Interferon γ (IFNγ)/interleukin-10 (IL-10) induced Nectin-2 on monocytes; in a negative feedback loop, Nectin-2 suppresses IFNγ production by NK cells. CONCLUSIONS The initial hours after CA may represent a window for therapeutic intervention in the resolution of inflammation via immune checkpoints. FUNDING This work was supported by funding from the American Heart Association, Brigham and Women's Hospital Department of Medicine, the Evergreen Innovation Fund, and the National Institutes of Health.
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Affiliation(s)
- Tomoyoshi Tamura
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Changde Cheng
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Wenan Chen
- Center for Applied Bioinformatics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Louis T Merriam
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Humra Athar
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Yaunghyun H Kim
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Reshmi Manandhar
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Muhammad Dawood Amir Sheikh
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Mayra Pinilla-Vera
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Jack Varon
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Peter C Hou
- Harvard Medical School, Boston, MA 02115, USA; Division of Emergency Critical Care Medicine, Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Patrick R Lawler
- Peter Munk Cardiac Centre, Toronto General Hospital, Toronto, ON M5G 2N2, Canada; McGill University Health Centre, Montreal, QC H4A 3J1, Canada
| | - William M Oldham
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Raghu R Seethala
- Harvard Medical School, Boston, MA 02115, USA; Division of Emergency Critical Care Medicine, Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Yohannes Tesfaigzi
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Alexandra J Weissman
- Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Rebecca M Baron
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Fumito Ichinose
- Harvard Medical School, Boston, MA 02115, USA; Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Katherine M Berg
- Harvard Medical School, Boston, MA 02115, USA; Division of Pulmonary, Critical Care, and Sleep Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Erin A Bohula
- Harvard Medical School, Boston, MA 02115, USA; Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - David A Morrow
- Harvard Medical School, Boston, MA 02115, USA; Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Xiang Chen
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
| | - Edy Y Kim
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA; Harvard Medical School, Boston, MA 02115, USA.
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3
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Evidence for Extensive Duplication and Subfunctionalization of FCRL6 in Armadillo ( Dasypus novemcinctus). Int J Mol Sci 2023; 24:ijms24054531. [PMID: 36901962 PMCID: PMC10003336 DOI: 10.3390/ijms24054531] [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: 01/10/2023] [Revised: 02/17/2023] [Accepted: 02/21/2023] [Indexed: 03/03/2023] Open
Abstract
The control of infections by the vertebrate adaptive immune system requires careful modulation to optimize defense and minimize harm to the host. The Fc receptor-like (FCRL) genes encode immunoregulatory molecules homologous to the receptors for the Fc portion of immunoglobulin (FCR). To date, nine different genes (FCRL1-6, FCRLA, FCRLB and FCRLS) have been identified in mammalian organisms. FCRL6 is located at a separate chromosomal position from the FCRL1-5 locus, has conserved synteny in mammals and is situated between the SLAMF8 and DUSP23 genes. Here, we show that this three gene block underwent repeated duplication in Dasypus novemcinctus (nine-banded armadillo) resulting in six FCRL6 copies, of which five appear functional. Among 21 mammalian genomes analyzed, this expansion was unique to D. novemcinctus. Ig-like domains that derive from the five clustered FCRL6 functional gene copies show high structural conservation and sequence identity. However, the presence of multiple non-synonymous amino acid changes that would diversify individual receptor function has led to the hypothesis that FCRL6 endured subfunctionalization during evolution in D. novemcinctus. Interestingly, D. novemcinctus is noteworthy for its natural resistance to the Mycobacterium leprae pathogen that causes leprosy. Because FCRL6 is chiefly expressed by cytotoxic T and NK cells, which are important in cellular defense responses against M. leprae, we speculate that FCRL6 subfunctionalization could be relevant for the adaptation of D. novemcinctus to leprosy. These findings highlight the species-specific diversification of FCRL family members and the genetic complexity underlying evolving multigene families critical for modulating adaptive immune protection.
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4
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Immune checkpoint blockade in melanoma: Advantages, shortcomings and emerging roles of the nanoparticles. Int Immunopharmacol 2022; 113:109300. [DOI: 10.1016/j.intimp.2022.109300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 09/26/2022] [Accepted: 09/28/2022] [Indexed: 11/05/2022]
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5
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SoRelle ED, Dai J, Reinoso-Vizcaino NM, Barry AP, Chan C, Luftig MA. Time-resolved transcriptomes reveal diverse B cell fate trajectories in the early response to Epstein-Barr virus infection. Cell Rep 2022; 40:111286. [PMID: 36044865 PMCID: PMC9879279 DOI: 10.1016/j.celrep.2022.111286] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 06/07/2022] [Accepted: 08/08/2022] [Indexed: 01/28/2023] Open
Abstract
Epstein-Barr virus infection of B lymphocytes elicits diverse host responses via well-adapted transcriptional control dynamics. Consequently, this host-pathogen interaction provides a powerful system to explore fundamental processes leading to consensus fate decisions. Here, we use single-cell transcriptomics to construct a genome-wide multistate model of B cell fates upon EBV infection. Additional single-cell data from human tonsils reveal correspondence of model states to analogous in vivo phenotypes within secondary lymphoid tissue, including an EBV+ analog of multipotent activated precursors that can yield early memory B cells. These resources yield exquisitely detailed perspectives of the transforming cellular landscape during an oncogenic viral infection that simulates antigen-induced B cell activation and differentiation. Thus, they support investigations of state-specific EBV-host dynamics, effector B cell fates, and lymphomagenesis. To demonstrate this potential, we identify EBV infection dynamics in FCRL4+/TBX21+ atypical memory B cells that are pathogenically associated with numerous immune disorders.
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Affiliation(s)
- Elliott D. SoRelle
- Department of Molecular Genetics and Microbiology, Duke Center for Virology, Duke University School of Medicine, Durham, NC 27710,Department of Biostatistics and Bioinformatics, Duke University School of Medicine, Durham, NC 27710,Corresponding Authors: Elliott D. SoRelle () & Micah A. Luftig ()
| | - Joanne Dai
- Department of Molecular Genetics and Microbiology, Duke Center for Virology, Duke University School of Medicine, Durham, NC 27710,Current address: Amgen Inc., 1120 Veterans Blvd, South San Francisco, CA 94080
| | - Nicolás M. Reinoso-Vizcaino
- Department of Molecular Genetics and Microbiology, Duke Center for Virology, Duke University School of Medicine, Durham, NC 27710
| | - Ashley P. Barry
- Department of Molecular Genetics and Microbiology, Duke Center for Virology, Duke University School of Medicine, Durham, NC 27710
| | - Cliburn Chan
- Department of Biostatistics and Bioinformatics, Duke University School of Medicine, Durham, NC 27710
| | - Micah A. Luftig
- Department of Molecular Genetics and Microbiology, Duke Center for Virology, Duke University School of Medicine, Durham, NC 27710,Corresponding Authors: Elliott D. SoRelle () & Micah A. Luftig ()
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Sutra Del Galy A, Menegatti S, Fuentealba J, Lucibello F, Perrin L, Helft J, Darbois A, Saitakis M, Tosello J, Rookhuizen D, Deloger M, Gestraud P, Socié G, Amigorena S, Lantz O, Menger L. In vivo genome-wide CRISPR screens identify SOCS1 as intrinsic checkpoint of CD4 + T H1 cell response. Sci Immunol 2021; 6:eabe8219. [PMID: 34860579 DOI: 10.1126/sciimmunol.abe8219] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
[Figure: see text].
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Affiliation(s)
| | - Silvia Menegatti
- INSERM U932, PSL University, Institut Curie, Paris 75005, France
| | - Jaime Fuentealba
- INSERM U932, PSL University, Institut Curie, Paris 75005, France
| | | | - Laetitia Perrin
- INSERM U932, PSL University, Institut Curie, Paris 75005, France
| | - Julie Helft
- INSERM U932, PSL University, Institut Curie, Paris 75005, France
| | - Aurélie Darbois
- INSERM U932, PSL University, Institut Curie, Paris 75005, France
| | - Michael Saitakis
- INSERM U932, PSL University, Institut Curie, Paris 75005, France
| | - Jimena Tosello
- INSERM U932, PSL University, Institut Curie, Paris 75005, France
| | - Derek Rookhuizen
- INSERM U932, PSL University, Institut Curie, Paris 75005, France
| | - Marc Deloger
- INSERM US23, CNRS UMS 3655, Gustave Roussy Cancer Campus, 94800 Villejuif, France
| | - Pierre Gestraud
- Bioinformatics and Computational Systems Biology of Cancer, PSL Research University, MINES ParisTech, INSERM U900, Paris 75005, France
| | - Gérard Socié
- AP-HP Hospital Saint Louis, Hematology/Transplantation, Paris 75010, France
| | | | - Olivier Lantz
- INSERM U932, PSL University, Institut Curie, Paris 75005, France.,Laboratoire d'immunologie clinique, Institut Curie, Paris 75005, France.,Centre d'investigation Clinique en Biothérapie Gustave-Roussy Institut Curie (CIC-BT1428), Institut Curie, Paris 75005, France
| | - Laurie Menger
- INSERM U932, PSL University, Institut Curie, Paris 75005, France
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7
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DeLuca JM, Murphy MK, Wang X, Wilson TJ. FCRL1 Regulates B Cell Receptor-Induced ERK Activation through GRB2. THE JOURNAL OF IMMUNOLOGY 2021; 207:2688-2698. [PMID: 34697226 DOI: 10.4049/jimmunol.2100218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 09/17/2021] [Indexed: 11/19/2022]
Abstract
Regulation of BCR signaling has important consequences for generating effective Ab responses to pathogens and preventing production of autoreactive B cells during development. Currently defined functions of Fc receptor-like (FCRL) 1 include positive regulation of BCR-induced calcium flux, proliferation, and Ab production; however, the mechanistic basis of FCRL1 signaling and its contributions to B cell development remain undefined. Molecular characterization of FCRL1 signaling shows phosphotyrosine-dependent associations with GRB2, GRAP, SHIP-1, and SOS1, all of which can profoundly influence MAPK signaling. In contrast with previous characterizations of FCRL1 as a strictly activating receptor, we discover a role for FCRL1 in suppressing ERK activation under homeostatic and BCR-stimulated conditions in a GRB2-dependent manner. Our analysis of B cells in Fcrl1 -/- mice shows that ERK suppression by FCRL1 is associated with a restriction in the number of cells surviving splenic maturation in vivo. The capacity of FCRL1 to modulate ERK activation presents a potential for FCRL1 to be a regulator of peripheral B cell tolerance, homeostasis, and activation.
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Affiliation(s)
- Jenna M DeLuca
- Department of Microbiology, Miami University, Oxford, OH
| | | | - Xin Wang
- Department of Microbiology, Miami University, Oxford, OH
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8
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Bottino C, Dondero A, Castriconi R. Inhibitory axes impacting on the activity and fate of Innate Lymphoid Cells. Mol Aspects Med 2021; 80:100985. [PMID: 34176653 DOI: 10.1016/j.mam.2021.100985] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 06/05/2021] [Accepted: 06/06/2021] [Indexed: 01/02/2023]
Abstract
In neoplastic patients, an effective immune response ideally should be achieved by the coordinated action of different immune cells with tumor-suppressive functions. These include the more cytolytic members of the Innate Lymphoid Cells (ILCs) family represented by the Natural Killer (NK) cells, whose activities in cancer patients, however, can be hampered by several inhibitory signals. These are generated by membrane-bound and soluble molecules that, interacting with specific inhibitory receptors, create inhibitory axes impacting the NK cell differentiation and effector functions. These breaks, which now represent major immunotherapeutic targets, may be sensitive to interferon (IFN)-γ, whose source, in vivo, is represented by different cell types including the NK and ILC1. Since also ILCs can express receptors of the inhibitory axes like PD-1 and TIGIT, their therapeutic blockade might further amplify the IFN-γ release that, as an unwanted side effect, would promote the onset of NK cell-resistant tumor variants (NKRTV) expressing ligands involved in inhibitory axes. These variants might also arise from the activity of other cytokines such as IL-27, which can increase the expression of HLA class I and PD-Ls in different cell types, including tumor cells. Besides the amplification of membrane-bound inhibitory axes, tumors can reduce the number of infiltrating cytolytic ILCs, promote the recruitment of poorly cytolytic NK cell subsets, and manipulate to their advantage the infiltrating immune cells, which acquire tumor-promoting activities. This occurs thanks to the production of soluble factors including TGF-β1 and IL-18 that, alone or in combination, modify the activating and chemokine receptor repertoire of NK cells, and induce the ILCs differentiation towards cells ineffective in fighting cancer or, even worse, with tumor-promoting functions. The present review aims to present and discuss major inhibitory axes impacting on ILCs functions, migration, and differentiation with a major focus on tumor context.
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Affiliation(s)
- Cristina Bottino
- Department of Experimental Medicine (DIMES), University of Genova, Genova, Italy; IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Alessandra Dondero
- Department of Experimental Medicine (DIMES), University of Genova, Genova, Italy
| | - Roberta Castriconi
- Department of Experimental Medicine (DIMES), University of Genova, Genova, Italy.
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9
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Immune Therapy: What Can We Learn From Acquired Resistance? Lung Cancer 2021. [DOI: 10.1007/978-3-030-74028-3_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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10
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Abstract
Dendritic cells are a specialized subset of hematopoietic cells essential for mounting immunity against tumors and infectious disease as well as inducing tolerance for maintenance of homeostasis. DCs are equipped with number of immunoregulatory or stimulatory molecules that interact with other leukocytes to modulate their functions. Recent advances in DC biology identified a specific role for the conventional dendritic cell type 1 (cDC1) in eliciting cytotoxic CD8+ T cells essential for clearance of tumors and infected cells. The critical role of this subset in eliciting immune responses or inducing tolerance has largely been defined in mice whereas the biology of human cDC1 is poorly characterized owing to their extremely low frequency in tissues. A detailed characterization of the functions of many immunoregulatory and stimulatory molecules expressed by human cDC1 is critical for understanding their biology to exploit this subset for designing novel therapeutic modalities against cancer, infectious disease and autoimmune disorders.
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Affiliation(s)
- Sreekumar Balan
- The Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York City, NY, United States
| | - Kristen J Radford
- Cancer Immunotherapies Laboratory, Mater Research Institute, University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Nina Bhardwaj
- The Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York City, NY, United States; Extramural member Parker Institute of Cancer Immunotherapy, CA, United States.
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11
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Davis RS. Roles for the FCRL6 Immunoreceptor in Tumor Immunology. Front Immunol 2020; 11:575175. [PMID: 33162991 PMCID: PMC7591390 DOI: 10.3389/fimmu.2020.575175] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 09/01/2020] [Indexed: 01/12/2023] Open
Abstract
Members of the Fc receptor-like (FCRL1-6) gene family encode transmembrane glycoproteins that are preferentially expressed by B cells and generally repress responses via cytoplasmic tyrosine-based regulation. Given their distribution and function, there is a growing appreciation for their roles in lymphoproliferative disorders and as immunotherapeutic targets. In contrast to FCRL1-5, FCRL6 is distinctly expressed outside the B lineage by cytotoxic T and NK lymphocytes. Its restricted expression by these orchestrators of cell-mediated immunity, along with its inhibitory properties and extracellular interactions with MHCII/HLA-DR, represent a newly appreciated axis with relevance in tolerance and cancer defense. The significance of FCRL6 in this arena has been recently demonstrated by its upregulation in HLA-DR+ tumor samples from melanoma, breast, and lung cancer patients who relapsed following PD-1 blockade. These findings imply a potential mechanistic role for FCRL6 in adaptive evasion to immune checkpoint therapy. Here we review these new developments in the FCRL field and identify new evidence for the prognostic significance of FCRL6 in malignancies that collectively indicate its potential as a biomarker and therapeutic target.
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Affiliation(s)
- Randall S Davis
- Departments of Medicine, Microbiology, and Biochemistry & Molecular Genetics, The Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, United States
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12
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Niehrs A, Altfeld M. Regulation of NK-Cell Function by HLA Class II. Front Cell Infect Microbiol 2020; 10:55. [PMID: 32133304 PMCID: PMC7040486 DOI: 10.3389/fcimb.2020.00055] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 01/31/2020] [Indexed: 12/11/2022] Open
Abstract
Natural Killer (NK) cells were initially described as part of the innate immune system and characterized by their ability to lyse malignant and virus-infected cells. The cytolytic function of NK cells is tightly controlled by activating and inhibitory receptors expressed on the cell surface. Ligands that interact with a variety of NK-cell receptors include the human leukocyte antigen (HLA) molecules, and the regulation of NK-cell function by HLA class I molecules is well-established. Earlier studies also suggested a role of HLA class II molecules in regulating NK cell activity; yet, interactions between HLA class II molecules and NK cell receptors have not been well-characterized. We recently identified a subset of HLA-DP molecules that can serve as ligands for the natural cytotoxicity receptor NKp44 and activate NK cells. This novel receptor-ligand interaction provides a potential mechanism to explain the strong associations of HLA-DP molecules with HBV infection outcomes, graft-vs.-host disease and inflammatory bowel disease. Furthermore, it adds a new mechanism for NK-cell crosstalk with immune cells expressing HLA class II molecules. In this perspective article, we discuss the potential implications of NK cell receptor interactions with HLA class II molecules for the regulation of immune responses.
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Affiliation(s)
- Annika Niehrs
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Marcus Altfeld
- Research Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany.,Institute for Immunology, Universitätsklinikum Hamburg Eppendorf, Hamburg, Germany
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13
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Hultberg J, Ernerudh J, Larsson M, Nilsdotter-Augustinsson Å, Nyström S. Plasma protein profiling reflects T H1-driven immune dysregulation in common variable immunodeficiency. J Allergy Clin Immunol 2020; 146:417-428. [PMID: 32057767 DOI: 10.1016/j.jaci.2020.01.046] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 01/14/2020] [Accepted: 01/17/2020] [Indexed: 12/31/2022]
Abstract
BACKGROUND Common variable immunodeficiency (CVID) is a disorder characterized by antibody deficiency. A significant fraction of the patients suffer from immune dysregulation, which leads to increased morbidity and mortality. The pathogenesis of this condition is poorly understood. OBJECTIVE Our aim was to find out whether the plasma protein signature in CVID is associated with clinical characteristics and lymphocyte aberrations. METHODS A highly sensitive proximity extension assay was used for targeted profiling of 145 plasma proteins in 29 patients with CVID. Phenotyping of peripheral lymphocytes was done by flow cytometry. The findings were correlated with the burden of immune dysregulation. RESULTS Unsupervised clustering of plasma protein profiles identified 2 distinct groups of patients with CVID that differed significantly in terms of the degree of complications due to immune dysregulation and in terms of the frequency of activated B- and T-cell subpopulations. Pathway analysis identified IFN-γ and IL-1β as the top enriched upstream regulators associated with higher grade of immune dysregulation. In addition, CVID was found to be associated with increased plasma levels of the B-cell-attracting chemokine CXCL13. CONCLUSION Clustering based on plasma protein profiles delineated a subgroup of patients with CVID with activated T cells and clinical complications due to immune dysregulation. Thus, data indicate that CVID-associated immune dysregulation is a TH1-mediated inflammatory process driven by the IFN-γ pathway.
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Affiliation(s)
- Jonas Hultberg
- Division of Molecular Virology, Department of Biomedicine and Clinical Sciences, Linköping University, Linköping, Sweden; Department of Clinical Immunology and Transfusions Medicine, and Department of Biomedicine and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Jan Ernerudh
- Department of Clinical Immunology and Transfusions Medicine, and Department of Biomedicine and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Marie Larsson
- Division of Molecular Virology, Department of Biomedicine and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Åsa Nilsdotter-Augustinsson
- Department of Infectious Diseases, and Department of Biomedicine and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Sofia Nyström
- Division of Molecular Virology, Department of Biomedicine and Clinical Sciences, Linköping University, Linköping, Sweden; Department of Clinical Immunology and Transfusions Medicine, and Department of Biomedicine and Clinical Sciences, Linköping University, Linköping, Sweden.
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Yousefi Z, Sharifzadeh S, Yar-Ahmadi V, Andalib A, Eskandari N. Fc Receptor-Like 1 as a Promising Target for Immunotherapeutic Interventions of B-Cell-Related Disorders. Biomark Insights 2019; 14:1177271919882351. [PMID: 31798301 PMCID: PMC6864034 DOI: 10.1177/1177271919882351] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 09/22/2019] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Human B-cell responses are regulated through synergy between a collection of activation and inhibitory receptors. Fc receptor-like (FCRL) molecules have recently been identified as co-receptors that are preferentially expressed in human B-cells, which may also play an important role in the regulation of human B-cell responses. FCRL1 is a member of the FCRL family molecules with 2 immunoreceptor tyrosine-based activation motifs (ITAMs) in its cytoplasmic tail. This study aimed to investigate the regulatory roles of FCRL1 in human B-cell responses. MATERIALS AND METHODS The regulatory potential of FCRL1 in human B-cell through knockdown of FCRL1 expression in the Ramos and Daudi Burkitt lymphoma (BL) cell lines by using the retroviral-based short hairpin ribonucleic acid (shRNA) delivery method. The functional consequences of FCRL1 knockdown were assessed by measuring the proliferation, apoptosis, and the expression levels of Bcl-2, Bid, and Bax genes as well as phosphoinositide-3 kinase/-serine-threonine kinase AKT (PI3K/p-AKT) pathway in the BL cells, using the quantitative real-time polymerase chain reaction (PCR) and flow cytometry analysis. The NF-κB activity was also measured by the enzyme-linked immunosorbent assay (ELISA). RESULTS FCRL1 knockdown significantly decreased cell proliferation and increased apoptotic cell death in the BL cells. There was a significant reduction in the extent of the Bcl-2 gene expression in the treated BL cells compared with control cells. On the contrary, FCRL1 knockdown increased the expression levels of Bid and Bax genes in the treated BL cells when compared with control cells. In addition, the extent of the PI3K/p-AKT expression and phosphorylated-p65 NF-κB activity was significantly decreased in the treated BL cells compared with control cells. CONCLUSIONS These results suggest that FCRL1 can play a key role in the activation of human B-cell responses and has the potential to serve as a target for immunotherapy of FCRL1 positive B-cell-related disorders.
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Affiliation(s)
- Zahra Yousefi
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sedigheh Sharifzadeh
- Diagnostic Laboratory Sciences and Technology Research Center, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Vali Yar-Ahmadi
- Department of Parasitology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Alireza Andalib
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Nahid Eskandari
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
- Applied Physiology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
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15
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Yousefi Z, Eskandari N. Prognostic significance of Fc receptor-like 1 in patients with chronic lymphocytic leukemia, hairy cell leukemia, and various B-cell non-Hodgkin's lymphoma. Leuk Res Rep 2019; 12:100181. [PMID: 31467839 PMCID: PMC6710560 DOI: 10.1016/j.lrr.2019.100181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 06/06/2019] [Accepted: 08/09/2019] [Indexed: 11/20/2022] Open
Abstract
Fc receptor-like 1 (FCRL1) positively regulates B-cell responses and may involve in the pathogenesis of B-cell malignancies. This study examined the expression pattern of FCRL1 in B-cell non-Hodgkin's lymphoma patients using real-time PCR and flow cytometry. The results revealed higher levels of FCRL1 expression in diffuse large B-cell lymphoma, hairy cell leukemia, and Burkitt lymphoma patients compared with control groups. There was a significant reduction in the levels of FCRL1 expression in chronic lymphocytic leukemia and mantle cell lymphoma patients compared with healthy individuals. These findings suggest FCRL1 as an excellent marker for the prognosis or immunotherapy of B-cell malignancies.
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Affiliation(s)
- Zahra Yousefi
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Nahid Eskandari
- Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.,Applied Physiology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
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16
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Johnson DB, Nixon MJ, Wang Y, Wang DY, Castellanos E, Estrada MV, Ericsson-Gonzalez PI, Cote CH, Salgado R, Sanchez V, Dean PT, Opalenik SR, Schreeder DM, Rimm DL, Kim JY, Bordeaux J, Loi S, Horn L, Sanders ME, Ferrell PB, Xu Y, Sosman JA, Davis RS, Balko JM. Tumor-specific MHC-II expression drives a unique pattern of resistance to immunotherapy via LAG-3/FCRL6 engagement. JCI Insight 2018; 3:120360. [PMID: 30568030 PMCID: PMC6338319 DOI: 10.1172/jci.insight.120360] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 11/06/2018] [Indexed: 12/12/2022] Open
Abstract
Immunotherapies targeting the PD-1 pathway produce durable responses in many cancers, but the tumor-intrinsic factors governing response and resistance are largely unknown. MHC-II expression on tumor cells can predict response to anti-PD-1 therapy. We therefore sought to determine how MHC-II expression by tumor cells promotes PD-1 dependency. Using transcriptional profiling of anti-PD-1-treated patients, we identified unique patterns of immune activation in MHC-II+ tumors. In patients and preclinical models, MHC-II+ tumors recruited CD4+ T cells and developed dependency on PD-1 as well as Lag-3 (an MHC-II inhibitory receptor), which was upregulated in MHC-II+ tumors at acquired resistance to anti-PD-1. Finally, we identify enhanced expression of FCRL6, another MHC-II receptor expressed on NK and T cells, in the microenvironment of MHC-II+ tumors. We ascribe this to what we believe to be a novel inhibitory function of FCRL6 engagement, identifying it as an immunotherapy target. These data suggest a MHC-II-mediated context-dependent mechanism of adaptive resistance to PD-1-targeting immunotherapy.
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Affiliation(s)
| | | | - Yu Wang
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | | | | | - Monica V. Estrada
- Department of Pathology, University of California, San Diego, San Diego, California, USA
| | - Paula I. Ericsson-Gonzalez
- Department of Pathology Microbiology, and Immunology, and,Breast Cancer Research Program, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | | | - Roberto Salgado
- Department of Pathology, GZA-ZNA Hospitals, Antwerp, Belgium.,Department of Oncology, University of Melbourne and Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | | | | | | | | | - David L. Rimm
- Departments of Pathology and Medicine, Yale University, New Haven, Connecticut, USA
| | - Ju Young Kim
- Navigate BioPharma Services Inc., a Novartis Company, Carlsbad, California, USA
| | - Jennifer Bordeaux
- Navigate BioPharma Services Inc., a Novartis Company, Carlsbad, California, USA
| | - Sherene Loi
- Department of Oncology, University of Melbourne and Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | | | - Melinda E. Sanders
- Department of Pathology Microbiology, and Immunology, and,Breast Cancer Research Program, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | | | - Yaomin Xu
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Jeffrey A. Sosman
- Department of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Randall S. Davis
- Departments of Medicine, Microbiology, and Biochemistry and Molecular Genetics, University of Alabama, Birmingham, Alabama, USA
| | - Justin M. Balko
- Department of Medicine and,Breast Cancer Research Program, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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17
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Johnson DB, Nixon MJ, Wang Y, Wang DY, Castellanos E, Estrada MV, Ericsson-Gonzalez PI, Cote CH, Salgado R, Sanchez V, Dean PT, Opalenik SR, Schreeder DM, Rimm DL, Kim JY, Bordeaux J, Loi S, Horn L, Sanders ME, Ferrell PB, Xu Y, Sosman JA, Davis RS, Balko JM. Tumor-specific MHC-II expression drives a unique pattern of resistance to immunotherapy via LAG-3/FCRL6 engagement. JCI Insight 2018. [PMID: 30568030 DOI: 10.1172/jci.insight.120360.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Immunotherapies targeting the PD-1 pathway produce durable responses in many cancers, but the tumor-intrinsic factors governing response and resistance are largely unknown. MHC-II expression on tumor cells can predict response to anti-PD-1 therapy. We therefore sought to determine how MHC-II expression by tumor cells promotes PD-1 dependency. Using transcriptional profiling of anti-PD-1-treated patients, we identified unique patterns of immune activation in MHC-II+ tumors. In patients and preclinical models, MHC-II+ tumors recruited CD4+ T cells and developed dependency on PD-1 as well as Lag-3 (an MHC-II inhibitory receptor), which was upregulated in MHC-II+ tumors at acquired resistance to anti-PD-1. Finally, we identify enhanced expression of FCRL6, another MHC-II receptor expressed on NK and T cells, in the microenvironment of MHC-II+ tumors. We ascribe this to what we believe to be a novel inhibitory function of FCRL6 engagement, identifying it as an immunotherapy target. These data suggest a MHC-II-mediated context-dependent mechanism of adaptive resistance to PD-1-targeting immunotherapy.
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Affiliation(s)
| | | | - Yu Wang
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | | | | | - Monica V Estrada
- Department of Pathology, University of California, San Diego, San Diego, California, USA
| | - Paula I Ericsson-Gonzalez
- Department of Pathology Microbiology, and Immunology, and.,Breast Cancer Research Program, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | | | - Roberto Salgado
- Department of Pathology, GZA-ZNA Hospitals, Antwerp, Belgium.,Department of Oncology, University of Melbourne and Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | | | | | | | | | - David L Rimm
- Departments of Pathology and Medicine, Yale University, New Haven, Connecticut, USA
| | - Ju Young Kim
- Navigate BioPharma Services Inc., a Novartis Company, Carlsbad, California, USA
| | - Jennifer Bordeaux
- Navigate BioPharma Services Inc., a Novartis Company, Carlsbad, California, USA
| | - Sherene Loi
- Department of Oncology, University of Melbourne and Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | | | - Melinda E Sanders
- Department of Pathology Microbiology, and Immunology, and.,Breast Cancer Research Program, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | | | - Yaomin Xu
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Jeffrey A Sosman
- Department of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Randall S Davis
- Departments of Medicine, Microbiology, and Biochemistry and Molecular Genetics, University of Alabama, Birmingham, Alabama, USA
| | - Justin M Balko
- Department of Medicine and.,Breast Cancer Research Program, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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18
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Rostamzadeh D, Kazemi T, Amirghofran Z, Shabani M. Update on Fc receptor-like (FCRL) family: new immunoregulatory players in health and diseases. Expert Opin Ther Targets 2018; 22:487-502. [PMID: 29737217 DOI: 10.1080/14728222.2018.1472768] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
INTRODUCTION Fc receptor-like (FCRL) molecules, as recently identified members of the immunoglobulin superfamily (IgSF), are preferentially expressed by B-cells. They have variable number of extracellular immunoglobulin-like domains and cytoplasmic activating ITAMs and/or inhibitory ITIMs. FCRL1-5 are dominantly expressed in different stages of B-cells development. But, FCRL6 is preferentially expressed in different subsets of T-cells and NK cells. FCRL1-5 could regulate different features of B-cell evolution such as development, differentiation, activation, antibody secretion and isotype switching. Areas covered: Improved understanding of FCRL expression may grant B-cells and finally its signaling pathways, alone or in cooperation with other signaling molecules, as interesting new targets for diagnostic, monitoring and immunotherapeutic modalities; although further investigations remain to be defined. Recent investigations on different family members of FCRL proteins have substantiated their differential expression on different tissues, malignancies, immune related disease and infectious diseases. Expert opinion: FCRLs restricted expressions in normal B-cells and T-cell subsets accompanied with their overexpression in B-cell malignancies introduce them as logical candidates for the development of antibody- and cell-based immunotherapy approaches in B-cell malignancies, immune-mediated and infectious diseases. FCRLs would be applied as attractive and specific targets for immunodiagnostic approaches, clinical prognosis as well as disease monitoring of relevant patients.
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Affiliation(s)
- Davood Rostamzadeh
- a Drug Applied Research Center , Tabriz University of Medical Sciences , Tabriz , Iran.,b Immunology Research Center , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Tohid Kazemi
- b Immunology Research Center , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Zahra Amirghofran
- c Department of Immunology, Medical School , Shiraz University of Medical Sciences , Shiraz , Iran.,d Autoimmune Disease Research Center and Medicinal and Natural Products Chemistry Research Center , Shiraz University of Medical Sciences , Shiraz , Iran
| | - Mahdi Shabani
- e Department of Immunology, School of Medicine , Shahid Beheshti University of Medical Sciences , Tehran , Iran.,f Monoclonal Antibody Research Center , Avicenna Research Institute, ACECR , Tehran , Iran
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19
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Whole transcriptome profiling reveals major cell types in the cellular immune response against acute and chronic active Epstein-Barr virus infection. Sci Rep 2017; 7:17775. [PMID: 29259291 PMCID: PMC5736708 DOI: 10.1038/s41598-017-18195-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 12/06/2017] [Indexed: 02/08/2023] Open
Abstract
Epstein-Barr virus (EBV) is a common human pathogen that infects over 95% of the population worldwide. In the present study, the whole transcriptome microarray data were generated from peripheral blood mononuclear cells from Chinese children with acute infectious mononucleosis (AIM) and chronic active EBV infection (CAEBV) that were also compared with a publicly available microarray dataset from a study of American college students with AIM. Our study characterized for the first time a broad spectrum of molecular signatures in AIM and CAEBV. The key findings from the transcriptome profiling were validated with qPCR and flow cytometry assays. The most important finding in our study is the discovery of predominant γδ TCR expression and γδ T cell expansion in AIM. This finding, in combination with the striking up-regulation of CD3, CD8 and CD94, suggests that CD8+ T cells and CD94+ NK cells may play a major role in AIM. Moreover, the unique up-regulation of CD64A/B and its significant correlation with the monocyte marker CD14 was observed in CAEBV and that implies an important role of monocytes in CAEBV. In conclusion, our study reveals major cell types (particularly γδ T cells) in the host cellular immune response against AIM and CAEBV.
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20
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Abstract
Members of the family of Fc receptor-like (FcRL) proteins, homologous to FcγRI, have been identified by multiple research groups. Consequently, they have been described using multiple nomenclatures including Fc receptor homologs (FcRH), immunoglobulin superfamily receptor translocation-associated genes (IRTA), immunoglobulin-Fc-gp42-related genes (IFGP), Src homology 2 domain-containing phosphatase anchor proteins (SPAP), and B cell cross-linked by anti-immunoglobulin M-activating sequences (BXMAS). They are now referred to under a unified nomenclature as FCRL. Eight different human FCRL genes have been identified, all of which appear to be related to the genes of the immunoglobulin superfamily (IgSF) of cellular adhesion molecules. These type 1 transmembrane glycoproteins are composed of different combinations of 5 types of immunoglobulin-like domains, with each protein consisting of 3 to 9 domains, and no individual domain type conserved throughout all of the FCRL proteins. Ligands for the majority of the FCRLs remain unknown. In general, FCRL expression is restricted to lymphocytes and is primarily expressed in B-lymphocytes, supporting FCRL’s involvement in a variety of immune disorders. Most FCRLs functionally repress B-cell activation; however, they might have dual roles in lymphocyte functions as these proteins often possess immunoreceptor tyrosine activation (ITAM) and inhibitory (ITIM) motif elements. The biological functions of these newly recognized FCRL proteins are just beginning to emerge, and might provide the insight necessary for understanding pathophysiology of lymphocyte disorders and treating different immune diseases.
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Affiliation(s)
- Mollie Capone
- Department of Microbiology and Immunology, and Hollings Cancer Center, Medical University of South Carolina, 173 Ashley Avenue, BSB-201, Charleston, SC 29425, USA
| | - John Matthew Bryant
- Department of Microbiology and Immunology, and Hollings Cancer Center, Medical University of South Carolina, 173 Ashley Avenue, BSB-201, Charleston, SC 29425, USA
| | - Natalie Sutkowski
- Department of Microbiology and Immunology, and Hollings Cancer Center, Medical University of South Carolina, 173 Ashley Avenue, BSB-201, Charleston, SC 29425, USA
| | - Azizul Haque
- Department of Microbiology and Immunology, and Hollings Cancer Center, Medical University of South Carolina, 173 Ashley Avenue, BSB-201, Charleston, SC 29425, USA
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21
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Jagannathan P, Kim CC, Greenhouse B, Nankya F, Bowen K, Eccles-James I, Muhindo MK, Arinaitwe E, Tappero JW, Kamya MR, Dorsey G, Feeney ME. Loss and dysfunction of Vδ2⁺ γδ T cells are associated with clinical tolerance to malaria. Sci Transl Med 2015; 6:251ra117. [PMID: 25163477 DOI: 10.1126/scitranslmed.3009793] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Although clinical immunity to malaria eventually develops among children living in endemic settings, the underlying immunologic mechanisms are not known. The Vδ2(+) subset of γδ T cells have intrinsic reactivity to malaria antigens, can mediate killing of Plasmodium falciparum merozoites, and expand markedly in vivo after malaria infection in previously naïve hosts, but their role in mediating immunity in children repeatedly exposed to malaria is unclear. We evaluated γδ T cell responses to malaria among 4-year-old children enrolled in a longitudinal study in Uganda. We found that repeated malaria was associated with reduced percentages of Vδ2(+) γδ T cells in peripheral blood, decreased proliferation and cytokine production in response to malaria antigens, and increased expression of immunoregulatory genes. Further, loss and dysfunction of proinflammatory Vδ2(+) γδ T cells were associated with a reduced likelihood of symptoms upon subsequent P. falciparum infection. Together, these results suggest that repeated malaria infection during childhood results in progressive loss and dysfunction of Vδ2(+) γδ T cells that may facilitate immunological tolerance of the parasite.
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Affiliation(s)
- Prasanna Jagannathan
- Department of Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA
| | - Charlie C Kim
- Department of Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA
| | - Bryan Greenhouse
- Department of Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA
| | - Felistas Nankya
- Infectious Diseases Research Collaboration, P.O. Box 7475, Kampala, Uganda
| | - Katherine Bowen
- Department of Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA
| | - Ijeoma Eccles-James
- Department of Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA
| | - Mary K Muhindo
- Infectious Diseases Research Collaboration, P.O. Box 7475, Kampala, Uganda
| | - Emmanuel Arinaitwe
- Infectious Diseases Research Collaboration, P.O. Box 7475, Kampala, Uganda
| | - Jordan W Tappero
- Center for Global Health, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - Moses R Kamya
- Department of Medicine, Makerere University College of Health Sciences, P.O. Box 7051, Kampala, Uganda
| | - Grant Dorsey
- Department of Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA
| | - Margaret E Feeney
- Department of Medicine, San Francisco General Hospital, University of California, San Francisco, San Francisco, CA 94110, USA. Department of Pediatrics, University of California, San Francisco, San Francisco, CA 94110, USA.
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22
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Li FJ, Won WJ, Becker EJ, Easlick JL, Tabengwa EM, Li R, Shakhmatov M, Honjo K, Burrows PD, Davis RS. Emerging roles for the FCRL family members in lymphocyte biology and disease. Curr Top Microbiol Immunol 2014; 382:29-50. [PMID: 25116094 DOI: 10.1007/978-3-319-07911-0_2] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Members of the extended Fc receptor-like (FCRL) family in humans and mice are preferentially expressed by B cells and possess tyrosine-based immunoregulatory function. Although the majority of these proteins repress B cell receptor-mediated activation, there is an emerging evidence for their bifunctionality and capacity to counter-regulate adaptive and innate signaling pathways. In light of these findings, the recent discovery of ligands for several of these molecules has begun to reveal exciting potential for them in normal lymphocyte biology and is launching a new phase of FCRL investigation. Importantly, these fundamental developments are also setting the stage for defining their altered roles in the pathogenesis of a growing number of immune-mediated diseases. Here we review recent advances in the FCRL field and highlight the significance of these intriguing receptors in normal and perturbed immunobiology.
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Affiliation(s)
- F J Li
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
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23
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Wilson TJ, Fuchs A, Colonna M. Cutting edge: human FcRL4 and FcRL5 are receptors for IgA and IgG. THE JOURNAL OF IMMUNOLOGY 2012; 188:4741-5. [PMID: 22491254 DOI: 10.4049/jimmunol.1102651] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Fc receptor-like (FcRL) proteins are a family of cellular receptors homologous to FcγRI and are predominantly expressed by B cells. They function to costimulate or inhibit BCR signaling through consensus ITAMs and ITIMs; however, the extracellular ligands of these receptors remain unknown or controversial. In this study, we tested the ability of human FcRL proteins to bind Igs and found FcRL4 and FcRL5 to be bona fide Fc receptors. In cellular binding assays, FcRL4 bound efficiently to IgA and FcRL5 binds all IgG isotypes with varied efficiency. Additionally, we generated mAbs capable of specifically blocking these interactions. Given their expression on activated B cells and potential for inhibitory signaling, FcRL4 and FcRL5 are likely to be important for immune complex-dependent human B cell regulation, and they represent novel therapeutic targets for receptor blockade therapies.
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Affiliation(s)
- Timothy J Wilson
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
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24
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Dement-Brown J, Newton CS, Ise T, Damdinsuren B, Nagata S, Tolnay M. Fc receptor-like 5 promotes B cell proliferation and drives the development of cells displaying switched isotypes. J Leukoc Biol 2011; 91:59-67. [PMID: 22028333 DOI: 10.1189/jlb.0211096] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The biological roles of B cell membrane proteins in the FCRL family are enigmatic. FCRL proteins, including FCRL5, were shown to modulate early BCR signaling, although the subsequent, functional consequences of receptor engagement are poorly understood. We found that FCRL5 surface protein itself was induced temporarily upon BCR stimulation of human, naive B cells, indicating precise control over timing of FCRL5 engagement. Cross-linking of FCRL5 on cells induced to express FCRL5 enhanced B cell proliferation significantly. This enhancement required costimulation of the BCR and TLR9, two signals required for optimal proliferation of naive B cells, whereas T cell help in the form of anti-CD40 and IL-2 was dispensable. In addition, we found that FCRL5 stimulation generated a high proportion of cells displaying surface IgG and IgA. Optimal development of cells expressing switched isotypes required T cell help, in addition to stimuli found necessary for enhanced proliferation. Surprisingly, cells that developed upon FCRL5 stimulation simultaneously displayed surface IgM, IgG, and IgA. Cells expressing multiple Ig isotypes were described in hairy cell leukemia, a disease in which FCRL5 is overexpressed. Enhanced proliferation and downstream isotype expression upon FCRL5 stimulation could reflect a physiological role for FCRL5 in the expansion and development of antigen-primed B cells. In addition, FCRL5 may promote growth of malignant cells in hairy cell leukemia and other FCRL5-expressing tumors.
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Affiliation(s)
- Jessica Dement-Brown
- Division of Monoclonal Antibodies, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland 20993, USA
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25
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Huard B. Comment on "Cutting edge: FcR-like 6 is an MHC class II receptor". JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2010; 185:4965; author reply 4965-6. [PMID: 20962262 DOI: 10.4049/jimmunol.1090093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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26
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Wilson TJ, Gilfillan S, Colonna M. Fc Receptor-Like A Associates with Intracellular IgG and IgM but Is Dispensable for Antigen-Specific Immune Responses. THE JOURNAL OF IMMUNOLOGY 2010; 185:2960-7. [DOI: 10.4049/jimmunol.1001428] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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27
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Schreeder DM, Cannon JP, Wu J, Li R, Shakhmatov MA, Davis RS. Cutting edge: FcR-like 6 is an MHC class II receptor. THE JOURNAL OF IMMUNOLOGY 2010; 185:23-7. [PMID: 20519654 DOI: 10.4049/jimmunol.1000832] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Receptors for the Fc portion of Ig have been extensively characterized and are known to regulate humoral responses, but members of the closely related FcR-like (FCRL) family have not been found to bind Ig, and to date, no ligand has been identified for any FCRL. Using a cell-based GFP reporter system and a recombinant Fc chimeric protein, we show that human FCRL6, a receptor selectively expressed by cytotoxic T and NK cells, directly binds HLA-DR, an MHC class II molecule. Given the similarity among constant regions of Ig and MHC molecules, these findings suggest that representatives of the FcR and FCRL multigene families may have independently evolved to engage two ancestral elements fundamental to adaptive immunity. This discovery may offer new insight into the interaction between cytotoxic lymphocytes and APCs and may have important implications for better understanding HLA disease susceptibility and pathogenesis.
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Affiliation(s)
- Daniel M Schreeder
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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28
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Ehrhardt GRA, Cooper MD. Immunoregulatory roles for fc receptor-like molecules. Curr Top Microbiol Immunol 2010; 350:89-104. [PMID: 20680805 DOI: 10.1007/82_2010_88] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Fc receptor-like (FCRL) molecules comprise a family of imunoregulatory transmembrane proteins that are preferentially, but not exclusively expressed on B lineage cells. A strong regulatory potential on B cell activation has been characterized for the different FCRL proteins, but their biological roles are just beginning to be elucidated. We review recent advances in the understanding of FCRL1-6 expression and function, and indicate their potential roles in the pathogenesis of immunodeficiencies, lymphoid malignancies and autoimmune diseases.
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Affiliation(s)
- Götz R A Ehrhardt
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA.
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Schreeder DM, Pan J, Li FJ, Vivier E, Davis RS. FCRL6 distinguishes mature cytotoxic lymphocytes and is upregulated in patients with B-cell chronic lymphocytic leukemia. Eur J Immunol 2009; 38:3159-66. [PMID: 18991291 DOI: 10.1002/eji.200838516] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Fc receptor-like 6 (FCRL6), the most recently characterized member of the FCRL family, is a cell surface glycoprotein with tyrosine-based regulatory potential. An extensive survey of human hematopoietic tissues disclosed that FCRL6 expression by NK- and T-cell subpopulations increases as a function of differentiation and is remarkably restricted to mature lymphocytes with cytotoxic capability. In particular, FCRL6 distinguishes perforin-expressing CD56dim NK cells, Vdelta1+ and Vdelta2+ gammadelta T cells, effector and effector memory CD8+ T cells, and rare cytotoxic CD4+ T cells in adult tissues. Analysis of this receptor in B-cell chronic lymphocytic leukemia (CLL) was also performed. FCRL6 was found to mark significantly expanded populations of cytotoxic CD8+ T, CD4+ T, and NK cells in patients with CLL. Despite sequence homology with the known Fc receptors for IgG and IgE, FCRL6 did not bind Ig. Although FCRL6 can be tyrosine-phosphorylated, its antibody-mediated ligation was unable to influence cellular activation. Collectively, these results demonstrate that FCRL6 is a distinct indicator of cytotoxic effector lymphocytes that is upregulated in diseases characterized by chronic immune stimulation.
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Affiliation(s)
- Daniel M Schreeder
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294-2182, USA
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Guselnikov SV, Ramanayake T, Erilova AY, Mechetina LV, Najakshin AM, Robert J, Taranin AV. The Xenopus FcR family demonstrates continually high diversification of paired receptors in vertebrate evolution. BMC Evol Biol 2008; 8:148. [PMID: 18485190 PMCID: PMC2413239 DOI: 10.1186/1471-2148-8-148] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2007] [Accepted: 05/16/2008] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Recent studies have revealed an unexpected diversity of domain architecture among FcR-like receptors that presumably fulfill regulatory functions in the immune system. Different species of mammals, as well as chicken and catfish have been found to possess strikingly different sets of these receptors. To better understand the evolutionary history of paired receptors, we extended the study of FcR-like genes in amphibian representatives Xenopus tropicalis and Xenopus laevis. RESULTS The diploid genome of X. tropicalis contains at least 75 genes encoding paired FcR-related receptors designated XFLs. The allotetraploid X. laevis displays many similar genes primarily expressed in lymphoid tissues. Up to 35 domain architectures generated by combinatorial joining of six Ig-domain subtypes and two subtypes of the transmembrane regions were found in XFLs. None of these variants are shared by FcR-related proteins from other studied species. Putative activating XFLs associate with the FcRgamma subunit, and their transmembrane domains are highly similar to those of activating mammalian KIR-related receptors. This argues in favor of a common origin for the FcR and the KIR families. Phylogenetic analysis shows that the entire repertoires of the Xenopus and mammalian FcR-related proteins have emerged after the amphibian-amniotes split. CONCLUSION FcR- and KIR-related receptors evolved through continual species-specific diversification, most likely by extensive domain shuffling and birth-and-death processes. This mode of evolution raises the possibility that the ancestral function of these paired receptors was a direct interaction with pathogens and that many physiological functions found in the mammalian receptors were secondary acquisitions or specializations.
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Affiliation(s)
| | | | | | | | | | - Jacques Robert
- University of Rochester Medical Centre, Rochester, NY, USA
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Iannello A, Debbeche O, Samarani S, Ahmad A. Antiviral NK cell responses in HIV infection: II. viral strategies for evasion and lessons for immunotherapy and vaccination. J Leukoc Biol 2008; 84:27-49. [PMID: 18388299 DOI: 10.1189/jlb.0907649] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
As is the case in other viral infections, humans respond to HIV infection by activating their NK cells. However, the virus uses several strategies to neutralize and evade the host's NK cell responses. Consequently, it is not surprising that NK cell functions become compromised in HIV-infected individuals in early stages of the infection. The compromised NK cell functions also adversely affect several aspects of the host's antiviral adaptive immune responses. Researchers have made significant progress in understanding how HIV counters NK cell responses of the host. This knowledge has opened new avenues for immunotherapy and vaccination against this infection. In the first part of this review article, we gave an overview of our current knowledge of NK cell biology and discussed how the genes encoding NK cell receptors and their ligands determine innate genetic resistance/susceptibilty of humans against HIV infections and AIDS. In this second part, we discuss NK cell responses, viral strategies to counter these responses, and finally, their implications for anti-HIV immunotherapy and vaccination.
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Affiliation(s)
- Alexandre Iannello
- Laboratory of Innate Immunity, Center of Research Ste Justine Hospital, 3175 Côte Ste-Catherine, Montreal, Qc, H3T 1C5, Canada
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