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Fuhrmann B, Jiang J, Mcleod P, Huang X, Balaji S, Arp J, Diao H, Ma S, Peng T, Haig A, Gunaratnam L, Zhang ZX, Jevnikar AM. Inhibition of NK cell cytotoxicity by tubular epithelial cell expression of Clr-b and Clr-f. CURRENT RESEARCH IN IMMUNOLOGY 2024; 5:100081. [PMID: 39113760 PMCID: PMC11303997 DOI: 10.1016/j.crimmu.2024.100081] [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: 01/15/2024] [Revised: 06/21/2024] [Accepted: 07/03/2024] [Indexed: 08/10/2024] Open
Abstract
NK cells participate in ischemia reperfusion injury (IRI) and transplant rejection. Endogenous regulatory systems may exist to attenuate NK cell activation and cytotoxicity in IRI associated with kidney transplantation. A greater understanding of NK regulation will provide insights in transplant outcomes and could direct new therapeutic strategies. Kidney tubular epithelial cells (TECs) may negatively regulate NK cell activation by their surface expression of a complex family of C-type lectin-related proteins (Clrs). We have found that Clr-b and Clr-f were expressed by TECs. Clr-b was upregulated by inflammatory cytokines TNFα and IFNγ in vitro. Silencing of both Clr-b and Clr-f expression using siRNA resulted in increased NK cell killing of TECs compared to silencing of either Clr-b or Clr-f alone (p < 0.01) and when compared to control TECs (p < 0.001). NK cells treated in vitro with soluble Clr-b and Clr-f proteins reduced their capacity to kill TECs (p < 0.05). Hence, NK cell cytotoxicity can be inhibited by Clr proteins on the surface of TECs. Our study suggests a synergistic effect of Clr molecules in regulating NK cell function in renal cells and this may represent an important endogenous regulatory system to limit NK cell-mediated organ injury during inflammation.
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Affiliation(s)
- Benjamin Fuhrmann
- Matthew Mailing Centre for Translational Transplant Studies, Lawson Health Research Institute, London, Ontario, Canada
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Jifu Jiang
- Matthew Mailing Centre for Translational Transplant Studies, Lawson Health Research Institute, London, Ontario, Canada
| | - Patrick Mcleod
- Matthew Mailing Centre for Translational Transplant Studies, Lawson Health Research Institute, London, Ontario, Canada
| | - Xuyan Huang
- Matthew Mailing Centre for Translational Transplant Studies, Lawson Health Research Institute, London, Ontario, Canada
| | - Shilpa Balaji
- Matthew Mailing Centre for Translational Transplant Studies, Lawson Health Research Institute, London, Ontario, Canada
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Jaqueline Arp
- Matthew Mailing Centre for Translational Transplant Studies, Lawson Health Research Institute, London, Ontario, Canada
| | - Hong Diao
- Matthew Mailing Centre for Translational Transplant Studies, Lawson Health Research Institute, London, Ontario, Canada
| | - Shengwu Ma
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Tianqing Peng
- Department of Pathology and Laboratory Medicine, Western University, London, Ontario, Canada
| | - Aaron Haig
- Department of Pathology and Laboratory Medicine, Western University, London, Ontario, Canada
| | - Lakshman Gunaratnam
- Matthew Mailing Centre for Translational Transplant Studies, Lawson Health Research Institute, London, Ontario, Canada
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
- Multi-Organ Transplantation Program, London Health Sciences Centre, London, Ontario, Canada
- Division of Nephrology, Department of Medicine, Western University, London, Ontario, Canada
| | - Zhu-Xu Zhang
- Matthew Mailing Centre for Translational Transplant Studies, Lawson Health Research Institute, London, Ontario, Canada
- Department of Pathology and Laboratory Medicine, Western University, London, Ontario, Canada
- Multi-Organ Transplantation Program, London Health Sciences Centre, London, Ontario, Canada
- Division of Nephrology, Department of Medicine, Western University, London, Ontario, Canada
| | - Anthony M. Jevnikar
- Matthew Mailing Centre for Translational Transplant Studies, Lawson Health Research Institute, London, Ontario, Canada
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
- Multi-Organ Transplantation Program, London Health Sciences Centre, London, Ontario, Canada
- Division of Nephrology, Department of Medicine, Western University, London, Ontario, Canada
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Fan C, Xing X, Murphy SJH, Poursine-Laurent J, Schmidt H, Parikh BA, Yoon J, Choudhary MNK, Saligrama N, Piersma SJ, Yokoyama WM, Wang T. Cis-regulatory evolution of the recently expanded Ly49 gene family. Nat Commun 2024; 15:4839. [PMID: 38844462 PMCID: PMC11156856 DOI: 10.1038/s41467-024-48990-y] [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: 11/13/2023] [Accepted: 05/14/2024] [Indexed: 06/09/2024] Open
Abstract
Comparative genomics has revealed the rapid expansion of multiple gene families involved in immunity. Members within each gene family often evolved distinct roles in immunity. However, less is known about the evolution of their epigenome and cis-regulation. Here we systematically profile the epigenome of the recently expanded murine Ly49 gene family that mainly encode either inhibitory or activating surface receptors on natural killer cells. We identify a set of cis-regulatory elements (CREs) for activating Ly49 genes. In addition, we show that in mice, inhibitory and activating Ly49 genes are regulated by two separate sets of proximal CREs, likely resulting from lineage-specific losses of CRE activity. Furthermore, we find that some Ly49 genes are cross-regulated by the CREs of other Ly49 genes, suggesting that the Ly49 family has begun to evolve a concerted cis-regulatory mechanism. Collectively, we demonstrate the different modes of cis-regulatory evolution for a rapidly expanding gene family.
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Affiliation(s)
- Changxu Fan
- Department of Genetics, Washington University School of Medicine, St. Louis, 63110, USA
- The Edison Family Center for Genome Sciences & Systems Biology, Washington University School of Medicine, St. Louis, 63110, USA
| | - Xiaoyun Xing
- Department of Genetics, Washington University School of Medicine, St. Louis, 63110, USA
- The Edison Family Center for Genome Sciences & Systems Biology, Washington University School of Medicine, St. Louis, 63110, USA
| | - Samuel J H Murphy
- Department of Neurology, Washington University School of Medicine, St. Louis, 63110, USA
- Medical Scientist Training Program, Washington University School of Medicine, St. Louis, 63110, USA
| | - Jennifer Poursine-Laurent
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, 63110, USA
| | - Heather Schmidt
- Department of Genetics, Washington University School of Medicine, St. Louis, 63110, USA
- The Edison Family Center for Genome Sciences & Systems Biology, Washington University School of Medicine, St. Louis, 63110, USA
| | - Bijal A Parikh
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, 63110, USA
| | - Jeesang Yoon
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, 63110, USA
| | - Mayank N K Choudhary
- Department of Genetics, Washington University School of Medicine, St. Louis, 63110, USA
- The Edison Family Center for Genome Sciences & Systems Biology, Washington University School of Medicine, St. Louis, 63110, USA
| | - Naresha Saligrama
- Department of Neurology, Washington University School of Medicine, St. Louis, 63110, USA
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, 63110, USA
- Bursky Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, 63110, USA
- Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, 63110, USA
- Center for Brain Immunology and Glia (BIG), Washington University School of Medicine, St. Louis, 63110, USA
| | - Sytse J Piersma
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, 63110, USA.
- Siteman Cancer Center, Washington University School of Medicine, St. Louis, 63110, USA.
| | - Wayne M Yokoyama
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, 63110, USA.
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, 63110, USA.
| | - Ting Wang
- Department of Genetics, Washington University School of Medicine, St. Louis, 63110, USA.
- The Edison Family Center for Genome Sciences & Systems Biology, Washington University School of Medicine, St. Louis, 63110, USA.
- McDonnell Genome Institute, Washington University School of Medicine, St. Louis, 63110, USA.
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3
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Brand J, Haro M, Lin X, Rimel B, McGregor SM, Lawrenson K, Dinh HQ. Fallopian tube single cell analysis reveals myeloid cell alterations in high-grade serous ovarian cancer. iScience 2024; 27:108990. [PMID: 38384837 PMCID: PMC10879678 DOI: 10.1016/j.isci.2024.108990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 01/10/2024] [Accepted: 01/17/2024] [Indexed: 02/23/2024] Open
Abstract
Most high-grade serous ovarian cancers (HGSCs) likely initiate from fallopian tube (FT) epithelia. While epithelial subtypes have been characterized using single-cell RNA-sequencing (scRNA-Seq), heterogeneity of other compartments and their involvement in tumor progression are poorly defined. Integrated analysis of human FT scRNA-Seq and HGSC-related tissues, including tumors, revealed greater immune and stromal transcriptional diversity than previously reported. We identified abundant monocytes in FTs across two independent cohorts. The ratio of macrophages to monocytes is similar between benign FTs, ovaries, and adjacent normal tissues but significantly greater in tumors. FT-defined monocyte and macrophage signatures, cell-cell communication, and gene set enrichment analyses identified monocyte- and macrophage-specific interactions and functional pathways in paired tumors and adjacent normal tissues. Further reanalysis of HGSC scRNA-Seq identified monocyte and macrophage subsets associated with neoadjuvant chemotherapy. Taken together, our work provides data that an altered FT myeloid cell composition could inform the discovery of early detection markers for HGSC.
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Affiliation(s)
- Joshua Brand
- McArdle Laboratory for Cancer Research, Department of Oncology, School of Medicine and Public Health, University of Wisconsin – Madison, Madison, WI 53705, USA
| | - Marcela Haro
- Women’s Cancer Research Program at the Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Xianzhi Lin
- Women’s Cancer Research Program at the Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- RNA Biology Group, Division of Natural and Applied Sciences and Global Health Research Center, Duke Kunshan University, Kunshan 215316, Jiangsu Province, China
| | - B.J. Rimel
- Women’s Cancer Research Program at the Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Stephanie M. McGregor
- Department of Pathology and Laboratory Medicine, University of Wisconsin – Madison, Madison, WI 53705, USA
- University of Wisconsin Carbone Cancer Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53705, USA
| | - Kate Lawrenson
- Women’s Cancer Research Program at the Samuel Oschin Comprehensive Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Huy Q. Dinh
- McArdle Laboratory for Cancer Research, Department of Oncology, School of Medicine and Public Health, University of Wisconsin – Madison, Madison, WI 53705, USA
- University of Wisconsin Carbone Cancer Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53705, USA
- Department of Biostatistics and Medical Informatics, School of Medicine and Public Health, University of Wisconsin – Madison, Madison, WI 53705, USA
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Youk S, Lee DH, Song CS. Differing Expression and Potential Immunological Role of C-Type Lectin Receptors of Two Different Chicken Breeds against Low Pathogenic H9N2 Avian Influenza Virus. Pathogens 2024; 13:95. [PMID: 38276168 PMCID: PMC10818356 DOI: 10.3390/pathogens13010095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 12/21/2023] [Accepted: 01/08/2024] [Indexed: 01/27/2024] Open
Abstract
Diverse immune responses in different chicken lines can result in varying clinical consequences following avian influenza virus (AIV) infection. We compared two widely used layer breeds, Lohmann Brown (LB) and Lohmann White (LW), to examine virus replication and immune responses against H9N2 AIV infection. The transcription profile in the spleen of H9N2-infected chickens was compared using a microarray. Confirmatory real-time RT-PCR was used to measure the expression of C-type lectin, OASL, and MX1 genes. Additionally, to investigate the role of chicken lectin receptors in vitro, two C-type lectin receptors (CLRs) were expressed in DF-1 cells, and the early growth of the H9N2 virus was evaluated. The LB chickens shed a lower amount of virus from the cloaca compared with the LW chickens. Different expression levels of C-type lectin-like genes were observed in the transcription profile, with no significant differences in OASL or MX gene expression. Real-time RT-PCR indicated a sharp decrease in C-type lectin levels in the spleen of H9N2-infected LW chickens. In vitro studies demonstrated that cells overexpressing CLR exhibited lower virus replication, while silencing of homeostatic CLR had no effect on AIV replication. This study demonstrated distinct immune responses to H9N2 avian influenza in LB and LW chickens, particularly with differences in C-type lectin expression, potentially leading to lower virus shedding in LB chickens.
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Affiliation(s)
- Sungsu Youk
- Microbiology Laboratory, Department of Medicine, College of Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea;
| | - Dong-Hun Lee
- Wildlife Health Laboratory, College of Veterinary Medicine, Konkuk University, Seoul 05029, Republic of Korea;
| | - Chang-Seon Song
- Avian Diseases Laboratory, College of Veterinary Medicine, Konkuk University, Seoul 05029, Republic of Korea
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5
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Maeda K, Tanioka T, Takahashi R, Watanabe H, Sueki H, Takimoto M, Hashimoto SI, Ikeo K, Miwa Y, Kasama T, Iwamoto S. MCAM+CD161- Th17 Subset Expressing CD83 Enhances Tc17 Response in Psoriasis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2023; 210:1867-1881. [PMID: 37186262 DOI: 10.4049/jimmunol.2200530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 03/27/2023] [Indexed: 05/17/2023]
Abstract
Recent studies have highlighted the pathogenic roles of IL-17-producing CD8+ T cells (T-cytotoxic 17 [Tc17]) in psoriasis. However, the underlying mechanisms of Tc17 induction remain unclear. In this study, we focused on the pathogenic subsets of Th17 and their mechanism of promotion of Tc17 responses. We determined that the pathogenic Th17-enriched fraction expressed melanoma cell adhesion molecule (MCAM) and CCR6, but not CD161, because this subset produced IL-17A abundantly and the presence of these cells in the peripheral blood of patients has been correlated with the severity of psoriasis. Intriguingly, the serial analysis of gene expression revealed that CCR6+MCAM+CD161-CD4+ T cells displayed the gene profile for adaptive immune responses, including CD83, which is an activator for CD8+ T cells. Coculture assay with or without intercellular contact between CD4+ and CD8+ T cells showed that CCR6+MCAM+CD161-CD4+ T cells induced the proliferation of CD8+ T cells in a CD83-dependent manner. However, the production of IL-17A by CD8+ T cells required exogenous IL-17A, suggesting that intercellular contact via CD83 and the production of IL-17A from activated CD4+ T cells elicit Tc17 responses. Intriguingly, the CD83 expression was enhanced in the presence of IL-15, and CD83+ cells stimulated with IL-1β, IL-23, IL-15, and IL-15Rα did not express FOXP3. Furthermore, CCR6+MCAM+CD161-CD4+ T cells expressing CD83 were increased in the peripheral blood of patients, and the CD83+ Th17-type cells accumulated in the lesional skin of psoriasis. In conclusion, pathogenic MCAM+CD161- Th17 cells may be involved in the Tc17 responses via IL-17A and CD83 in psoriasis.
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Affiliation(s)
- Kohei Maeda
- Division of Physiology and Pathology, Department of Pharmacology, Toxicology, and Therapeutics, Showa University School of Pharmacy, Tokyo, Japan
| | - Toshihiro Tanioka
- Division of Physiology and Pathology, Department of Pharmacology, Toxicology, and Therapeutics, Showa University School of Pharmacy, Tokyo, Japan
| | - Rei Takahashi
- Division of Physiology and Pathology, Department of Pharmacology, Toxicology, and Therapeutics, Showa University School of Pharmacy, Tokyo, Japan
| | - Hideaki Watanabe
- Department of Dermatology, Showa University School of Medicine, Tokyo, Japan
| | - Hirohiko Sueki
- Department of Dermatology, Showa University School of Medicine, Tokyo, Japan
| | - Masafumi Takimoto
- Department of Pathology and Laboratory Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Shin-Ichi Hashimoto
- Department of Molecular Pathophysiology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama, Japan
| | - Kazuho Ikeo
- DNA Data Analysis Laboratory, National Institute of Genetics, Shizuoka, Japan
| | - Yusuke Miwa
- Department of Internal Medicine, Division of Rheumatology, Showa University School of Medicine, Tokyo, Japan
| | - Tsuyoshi Kasama
- Department of Internal Medicine, Division of Rheumatology, Showa University School of Medicine, Tokyo, Japan
| | - Sanju Iwamoto
- Division of Physiology and Pathology, Department of Pharmacology, Toxicology, and Therapeutics, Showa University School of Pharmacy, Tokyo, Japan
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6
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Al Olabi R, Hendy AEA, Alkassab MB, Alnajm K, Elias M, Ibrahim M, Carlyle JR, Makrigiannis AP, Rahim MMA. The inhibitory NKR-P1B receptor regulates NK cell-mediated mammary tumor immunosurveillance in mice. Oncoimmunology 2023; 12:2168233. [PMID: 36704449 PMCID: PMC9872954 DOI: 10.1080/2162402x.2023.2168233] [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] [Indexed: 01/24/2023] Open
Abstract
Natural killer (NK) cells are an important component of anti-cancer immunity, and their activity is regulated by an array of activating and inhibitory receptors. In mice, the inhibitory NKR-P1B receptor is expressed in NK cells and recognizes the C-type lectin-related protein-b (Clr-b) ligand. NKR-P1B:Clr-b interactions represent a 'missing-self' recognition system to monitor cellular levels of Clr-b on healthy and diseased cells. Here, we report an important role for NKR-P1B:Clr-b interactions in tumor immunosurveillance in MMTV-PyVT mice, which develop spontaneous mammary tumors. MMTV-PyVT mice on NKR-P1B-deficient genetic background developed mammary tumors earlier than on wild-type (WT) background. A greater proportion of tumor-infiltrating NK cells downregulate expression of the transcription factor Eomesodermin (EOMES) in NKR-P1B-deficient mice compared to WT mice. Tumor-infiltrating NK cells also downregulated CD49b expression but gain CD49a expression and exhibit effector functions, such as granzyme B upregulation and proliferation in mammary tumors. However, unlike the EOMES+ NK cells, the EOMES‒ NK cell subset is unable to respond to further in vitro stimulation and exhibits phenotypic alterations associated with immune dysfunction. These alterations included increased expression of PD-1, LAG-3, and TIGIT and decreased expression of NKp46, Ly49C/I, CD11b, and KLRG-1. Furthermore, tumor-infiltrating NKR-P1B-deficient NK cells exhibited an elevated dysfunctional immune phenotype compared to WT NK cells. These findings demonstrate that the NKR-P1B receptor plays an important role in mammary tumor surveillance by regulating anti-cancer immune responses and functional homeostasis in NK cells.
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Affiliation(s)
- Raghd Al Olabi
- Department of Biomedical Sciences, University of Windsor, Windsor, Ontario, Canada
| | - Abd El Aziz Hendy
- Department of Biomedical Sciences, University of Windsor, Windsor, Ontario, Canada
| | | | - Karla Alnajm
- Department of Biomedical Sciences, University of Windsor, Windsor, Ontario, Canada
| | - Manahel Elias
- Department of Biomedical Sciences, University of Windsor, Windsor, Ontario, Canada
| | - Mary Ibrahim
- Department of Biomedical Sciences, University of Windsor, Windsor, Ontario, Canada
| | - James R. Carlyle
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Andrew P. Makrigiannis
- Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Mir Munir A Rahim
- Department of Biomedical Sciences, University of Windsor, Windsor, Ontario, Canada,CONTACT Mir Munir A Rahim Department of Biomedical Sciences, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, N9B 3P4, Canada
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7
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Aguilar OA, Gonzalez-Hinojosa MD, Arakawa-Hoyt JS, Millan AJ, Gotthardt D, Nabekura T, Lanier LL. The CD16 and CD32b Fc-gamma receptors regulate antibody-mediated responses in mouse natural killer cells. J Leukoc Biol 2023; 113:27-40. [PMID: 36822164 PMCID: PMC10197019 DOI: 10.1093/jleuko/qiac003] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Indexed: 01/12/2023] Open
Abstract
Natural killer (NK) cells are innate lymphocytes capable of mediating immune responses without prior sensitization. NK cells express Fc-gamma receptors (FcγRs) that engage the Fc region of IgG. Studies investigating the role of FcγRs on mouse NK cells have been limited due to lack specific reagents. In this study, we characterize the expression and biological consequences of activating mouse NK cells through their FcγRs. We demonstrate that most NK cells express the activating CD16 receptor, and a subset of NK cells also expresses the inhibitory CD32b receptor. Critically, these FcγRs are functional on mouse NK cells and can modulate antibody-mediated responses. We also characterized mice with conditional knockout alleles of Fcgr3 (CD16) or Fcgr2b (CD32b) in the NK and innate lymphoid cell (ILC) lineage. NK cells in these mice did not reveal any developmental defects and were responsive to cross-linking activating NK receptors, cytokine stimulation, and killing of YAC-1 targets. Importantly, CD16-deficient NK cells failed to induce antibody-directed cellular cytotoxicity of antibody-coated B-cell lymphomas in in vitro assays. In addition, we demonstrate the important role of CD16 on NK cells using an in vivo model of cancer immunotherapy using anti-CD20 antibody treatment of B-cell lymphomas.
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Affiliation(s)
- Oscar A. Aguilar
- Department of Microbiology and Immunology, University of California - San Francisco and Parker Institute for Cancer Immunotherapy, San Francisco, CA, USA
| | - Maria D.R. Gonzalez-Hinojosa
- Department of Microbiology and Immunology, University of California - San Francisco and Parker Institute for Cancer Immunotherapy, San Francisco, CA, USA
| | - Janice S. Arakawa-Hoyt
- Department of Microbiology and Immunology, University of California - San Francisco and Parker Institute for Cancer Immunotherapy, San Francisco, CA, USA
| | - Alberto J. Millan
- Department of Microbiology and Immunology, University of California - San Francisco and Parker Institute for Cancer Immunotherapy, San Francisco, CA, USA
| | - Dagmar Gotthardt
- Department of Microbiology and Immunology, University of California - San Francisco and Parker Institute for Cancer Immunotherapy, San Francisco, CA, USA
- Present Address: Institute of Pharmacology and Toxicology, University of Veterinary Medicine, Vienna, Austria
| | - Tsukasa Nabekura
- Department of Microbiology and Immunology, University of California - San Francisco and Parker Institute for Cancer Immunotherapy, San Francisco, CA, USA
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance, University of Tsukuba, Ibaraki, Japan
| | - Lewis L. Lanier
- Department of Microbiology and Immunology, University of California - San Francisco and Parker Institute for Cancer Immunotherapy, San Francisco, CA, USA
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8
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Scur M, Parsons BD, Dey S, Makrigiannis AP. The diverse roles of C-type lectin-like receptors in immunity. Front Immunol 2023; 14:1126043. [PMID: 36923398 PMCID: PMC10008955 DOI: 10.3389/fimmu.2023.1126043] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 02/14/2023] [Indexed: 03/03/2023] Open
Abstract
Our understanding of the C-type lectin-like receptors (CTLRs) and their functions in immunity have continued to expand from their initial roles in pathogen recognition. There are now clear examples of CTLRs acting as scavenger receptors, sensors of cell death and cell transformation, and regulators of immune responses and homeostasis. This range of function reflects an extensive diversity in the expression and signaling activity between individual CTLR members of otherwise highly conserved families. Adding to this diversity is the constant discovery of new receptor binding capabilities and receptor-ligand interactions, distinct cellular expression profiles, and receptor structures and signaling mechanisms which have expanded the defining roles of CTLRs in immunity. The natural killer cell receptors exemplify this functional diversity with growing evidence of their activity in other immune populations and tissues. Here, we broadly review select families of CTLRs encoded in the natural killer cell gene complex (NKC) highlighting key receptors that demonstrate the complex multifunctional capabilities of these proteins. We focus on recent evidence from research on the NKRP1 family of CTLRs and their interaction with the related C-type lectin (CLEC) ligands which together exhibit essential immune functions beyond their defined activity in natural killer (NK) cells. The ever-expanding evidence for the requirement of CTLR in numerous biological processes emphasizes the need to better understand the functional potential of these receptor families in immune defense and pathological conditions.
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Affiliation(s)
- Michal Scur
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
| | - Brendon D Parsons
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
| | - Sayanti Dey
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
| | - Andrew P Makrigiannis
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada
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Abstract
The term "lectin" is derived from the Latin word lego- (aggregate) (Boyd & Shapleigh, 1954). Indeed, lectins' folds can flexibly alter their pocket structures just like Lego blocks, which enables them to grab a wide-variety of substances. Thus, this useful fold is well-conserved among various organisms. Through evolution, prototypic soluble lectins acquired transmembrane regions and signaling motifs to become C-type lectin receptors (CLRs). While CLRs seem to possess certain intrinsic affinity to self, some CLRs adapted to efficiently recognize glycoconjugates present in pathogens as pathogen-associated molecular patterns (PAMPs) and altered self. CLRs further extended their diversity to recognize non-glycosylated targets including pathogens and self-derived molecules. Thus, CLRs seem to have developed to monitor the internal/external stresses to maintain homeostasis by sensing various "unfamiliar" targets. In this review, we will summarize recent advances in our understanding of CLRs, their ligands and functions and discuss future perspectives.
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Affiliation(s)
- Carla Guenther
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Japan; Laboratory of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Suita, Japan
| | - Masamichi Nagae
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Japan; Laboratory of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Suita, Japan
| | - Sho Yamasaki
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Japan; Laboratory of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Suita, Japan.
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10
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Cao M, Ma L, Yan C, Wang H, Ran M, Chen Y, Wang X, Liang X, Chai L, Li X. Mouse Ocilrp2/Clec2i negatively regulates LPS-mediated IL-6 production by blocking Dap12-Syk interaction in macrophage. Front Immunol 2022; 13:984520. [PMID: 36300111 PMCID: PMC9589251 DOI: 10.3389/fimmu.2022.984520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 09/20/2022] [Indexed: 11/24/2022] Open
Abstract
C-type lectin Ocilrp2/Clec2i is widely expressed in dendritic cells, lymphokine-activated killer cells and activated T cells. Previous studies have shown that Ocilrp2 is an important regulator in the activation of T cells and NK cells. However, the role of Ocilrp2 in the inflammatory responses by activated macrophages is currently unknown. This study investigated the expression of inflammatory cytokines in LPS-induced macrophages from primary peritoneal macrophages silenced by specific siRNA target Ocilrp2. Ocilrp2 was significantly downregulated in macrophages via NF-κB and pathways upon LPS stimuli or VSV infection. Silencing Ocilrp2 resulted in the increased expression of IL-6 in LPS-stimulated peritoneal macrophages and mice. Moreover, IL-6 expression was reduced in LPS-induced Ocilrp2 over-expressing iBMDM cells. Furthermore, we found that Ocilrp2-related Syk activation is responsible for expressing inflammatory cytokines in LPS-stimulated macrophages. Silencing Ocilrp2 significantly promotes the binding of Syk to Dap12. Altogether, we identified the Ocilrp2 as a critical role in the TLR4 signaling pathway and inflammatory macrophages’ immune regulation, and added mechanistic insights into the crosstalk between TLR and Syk signaling.
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Affiliation(s)
- Mingya Cao
- Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital, School of Medicine, Henan University, Kaifeng, China
- Institute of Translational Medicine, School of Basic Medical Sciences, Henan University, Kaifeng, China
| | - Lina Ma
- Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital, School of Medicine, Henan University, Kaifeng, China
| | - Chenyang Yan
- Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital, School of Medicine, Henan University, Kaifeng, China
| | - Han Wang
- Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital, School of Medicine, Henan University, Kaifeng, China
| | - Mengzhe Ran
- Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital, School of Medicine, Henan University, Kaifeng, China
| | - Ying Chen
- Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital, School of Medicine, Henan University, Kaifeng, China
| | - Xiao Wang
- Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital, School of Medicine, Henan University, Kaifeng, China
| | - Xiaonan Liang
- Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital, School of Medicine, Henan University, Kaifeng, China
| | - Lihui Chai
- Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital, School of Medicine, Henan University, Kaifeng, China
- Institute of Translational Medicine, School of Basic Medical Sciences, Henan University, Kaifeng, China
- *Correspondence: Lihui Chai, ; Xia Li,
| | - Xia Li
- Joint National Laboratory for Antibody Drug Engineering, The First Affiliated Hospital, School of Medicine, Henan University, Kaifeng, China
- Institute of Translational Medicine, School of Basic Medical Sciences, Henan University, Kaifeng, China
- *Correspondence: Lihui Chai, ; Xia Li,
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11
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Potempa M, Aguilar OA, Gonzalez-Hinojosa MDR, Tenvooren I, Marquez DM, Spitzer MH, Lanier LL. Influence of Self-MHC Class I Recognition on the Dynamics of NK Cell Responses to Cytomegalovirus Infection. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:1742-1754. [PMID: 35321880 PMCID: PMC8976824 DOI: 10.4049/jimmunol.2100768] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 01/18/2022] [Indexed: 12/17/2022]
Abstract
Although interactions between inhibitory Ly49 receptors and their self-MHC class I ligands in C57BL/6 mice are known to limit NK cell proliferation during mouse CMV (MCMV) infection, we created a 36-marker mass cytometry (CyTOF) panel to investigate how these inhibitory receptors impact the NK cell response to MCMV in other phenotypically measurable ways. More than two thirds of licensed NK cells (i.e., those expressing Ly49C, Ly49I, or both) in uninfected mice had already differentiated into NK cells with phenotypes indicative of Ag encounter (KLRG1+Ly6C-) or memory-like status (KLRG1+Ly6C+). These pre-existing KLRG1+Ly6C+ NK cells resembled known Ag-specific memory NK cell populations in being less responsive to IL-18 and IFN-α stimulation in vitro and by selecting for NK cell clones with elevated expression of a Ly49 receptor. During MCMV infection, the significant differences between licensed and unlicensed (Ly49C-Ly49I-) NK cells disappeared within both CMV-specific (Ly49H+) and nonspecific (Ly49H-) responses. This lack of heterogeneity carried into the memory phase, with only a difference in CD16 expression manifesting between licensed and unlicensed MCMV-specific memory NK cell populations. Our results suggest that restricting proliferation is the predominant effect licensing has on the NK cell population during MCMV infection, but the inhibitory Ly49-MHC interactions that take place ahead of infection contribute to their limited expansion by shrinking the pool of licensed NK cells capable of robustly responding to new challenges.
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Affiliation(s)
- Marc Potempa
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA
| | - Oscar A Aguilar
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA
- The Parker Institute for Cancer Immunotherapy, San Francisco, CA
| | - Maria D R Gonzalez-Hinojosa
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA
- The Parker Institute for Cancer Immunotherapy, San Francisco, CA
| | - Iliana Tenvooren
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA
- The Parker Institute for Cancer Immunotherapy, San Francisco, CA
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, San Francisco, CA
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA; and
- Chan Zuckerberg Biohub, San Francisco, CA
| | - Diana M Marquez
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA
- The Parker Institute for Cancer Immunotherapy, San Francisco, CA
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, San Francisco, CA
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA; and
- Chan Zuckerberg Biohub, San Francisco, CA
| | - Matthew H Spitzer
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA
- The Parker Institute for Cancer Immunotherapy, San Francisco, CA
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, San Francisco, CA
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA; and
- Chan Zuckerberg Biohub, San Francisco, CA
| | - Lewis L Lanier
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA;
- The Parker Institute for Cancer Immunotherapy, San Francisco, CA
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12
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Clr-f expression regulates kidney immune and metabolic homeostasis. Sci Rep 2022; 12:4834. [PMID: 35318366 PMCID: PMC8940912 DOI: 10.1038/s41598-022-08547-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 03/09/2022] [Indexed: 11/25/2022] Open
Abstract
The C-type lectin-related protein, Clr-f, encoded by Clec2h in the mouse NK gene complex (NKC), is a member of a family of immune regulatory lectins that guide immune responses at distinct tissues of the body. Clr-f is highly expressed in the kidney; however, its activity in this organ is unknown. To assess the requirement for Clr-f in kidney health and function, we generated a Clr-f-deficient mouse (Clr-f−/−) by targeted deletions in the Clec2h gene. Mice lacking Clr-f exhibited glomerular and tubular lesions, immunoglobulin and C3 complement protein renal deposits, and significant abdominal and ectopic lipid accumulation. Whole kidney transcriptional profile analysis of Clr-f−/− mice at 7, 13, and 24 weeks of age revealed a dynamic dysregulation in lipid metabolic processes, stress responses, and inflammatory mediators. Examination of the immune contribution to the pathologies of Clr-f−/− mouse kidneys identified elevated IL-12 and IFNγ in cells of the tubulointerstitium, and an infiltrating population of neutrophils and T and B lymphocytes. The presence of these insults in a Rag1−/−Clr-f−/− background reveals that Clr-f−/− mice are susceptible to a T and B lymphocyte-independent renal pathogenesis. Our data reveal a role for Clr-f in the maintenance of kidney immune and metabolic homeostasis.
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13
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Park J, Kim J, Ko ES, Jeong JH, Park CO, Seo JH, Jang YS. Enzymatic bioconversion of ginseng powder increases the content of minor ginsenosides and potentiates immunostimulatory activity. J Ginseng Res 2021; 46:304-314. [PMID: 35509827 PMCID: PMC9058844 DOI: 10.1016/j.jgr.2021.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 12/04/2021] [Accepted: 12/14/2021] [Indexed: 11/29/2022] Open
Abstract
Background Ginsenosides are biologically active components of ginseng and have various functions. In this study, we investigated the immunomodulatory activity of a ginseng product generated from ginseng powder (GP) via enzymatic bioconversion. This product, General Bio compound K-10 mg solution (GBCK10S), exhibited increased levels of minor ginsenosides, including ginsenoside-F1, compound K, and compound Y. Methods The immunomodulatory properties of GBCK10S were confirmed using mice and a human natural killer (NK) cell line. We monitored the expression of molecules involved in immune responses via enzyme-linked immunosorbent assay, flow cytometry, NK cell-targeted cell destruction, quantitative reverse-transcription real-time polymerase chain reaction, and Western blot analyses. Results Oral administration of GBCK10S significantly increased serum immunoglobulin M levels and primed splenocytes to express pro-inflammatory cytokines such as interleukin-6, tumor necrosis factor-α, and interferon-γ. Oral administration of GBCK10S also activated NK cells in mice. Furthermore, GBCK10S treatment stimulated a human NK cell line in vitro, thereby increasing granzyme B gene expression and activating STAT5. Conclusion GBCK10S may have potent immunostimulatory properties and can activate immune responses mediated by B cells, Th1-type T cells, and NK cells.
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Affiliation(s)
- Jisang Park
- Innovative Research and Education Center for Integrated Bioactive Materials and the Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju, Republic of Korea
- Department of Molecular Biology and the Institute for Molecular Biology and Genetics, Jeonbuk National University, Jeonju, Republic of Korea
| | - Ju Kim
- Department of Molecular Biology and the Institute for Molecular Biology and Genetics, Jeonbuk National University, Jeonju, Republic of Korea
| | - Eun-Sil Ko
- R&D Center, General Bio Co., Ltd., Namwon, Republic of Korea
| | - Jong Hoon Jeong
- R&D Center, General Bio Co., Ltd., Namwon, Republic of Korea
| | - Cheol-Oh Park
- R&D Center, General Bio Co., Ltd., Namwon, Republic of Korea
| | - Jeong Hun Seo
- R&D Center, General Bio Co., Ltd., Namwon, Republic of Korea
| | - Yong-Suk Jang
- Innovative Research and Education Center for Integrated Bioactive Materials and the Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju, Republic of Korea
- Department of Molecular Biology and the Institute for Molecular Biology and Genetics, Jeonbuk National University, Jeonju, Republic of Korea
- Corresponding author. Department of Molecular Biology, Jeonbuk National University, Republic of Korea.
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14
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Konduri V, Oyewole-Said D, Vazquez-Perez J, Weldon SA, Halpert MM, Levitt JM, Decker WK. CD8 +CD161 + T-Cells: Cytotoxic Memory Cells With High Therapeutic Potential. Front Immunol 2021; 11:613204. [PMID: 33597948 PMCID: PMC7882609 DOI: 10.3389/fimmu.2020.613204] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 12/09/2020] [Indexed: 12/13/2022] Open
Abstract
NK1.1 and its human homolog CD161 are expressed on NK cells, subsets of CD4+ and CD8+ T cells, and NKT cells. While the expression of NK1.1 is thought to be inhibitory to NK cell function, it is reported to play both costimulatory and coinhibitory roles in T-cells. CD161 has been extensively studied and characterized on subsets of T-cells that are MR1-restricted, IL-17 producing CD4+ (TH17 MAIT cells) and CD8+ T cells (Tc17 cells). Non-MAIT, MR1-independent CD161-expressing T-cells also exist and are characterized as generally effector memory cells with a stem cell like phenotype. Gene expression analysis of this enigmatic subset indicates a significant enhancement in the expression of cytotoxic granzyme molecules and innate like stress receptors in CD8+NK1.1+/CD8+CD161+ cells in comparison to CD8+ cells that do not express NK1.1 or CD161. First identified and studied in the context of viral infection, the role of CD8+CD161+ T-cells, especially in the context of tumor immunology, is still poorly understood. In this review, the functional characteristics of the CD161-expressing CD8+ T cell subset with respect to gene expression profile, cytotoxicity, and tissue homing properties are discussed, and application of this subset to immune responses against infectious disease and cancer is considered.
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Affiliation(s)
- Vanaja Konduri
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, United States
| | - Damilola Oyewole-Said
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, United States
| | - Jonathan Vazquez-Perez
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, United States
| | - Scott A Weldon
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX, United States
| | - Matthew M Halpert
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, United States
| | - Jonathan M Levitt
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, United States.,Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, United States.,Scott Department of Urology, Baylor College of Medicine, Houston, TX, United States
| | - William K Decker
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, United States.,Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, United States.,Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX, United States
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15
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Gully BS, Venugopal H, Fulcher AJ, Fu Z, Li J, Deuss FA, Llerena C, Heath WR, Lahoud MH, Caminschi I, Rossjohn J, Berry R. The cryo-EM structure of the endocytic receptor DEC-205. J Biol Chem 2020; 296:100127. [PMID: 33257321 PMCID: PMC7948739 DOI: 10.1074/jbc.ra120.016451] [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: 10/15/2020] [Revised: 11/23/2020] [Accepted: 11/30/2020] [Indexed: 11/06/2022] Open
Abstract
DEC-205 (CD205), a member of the macrophage mannose receptor protein family, is the prototypic endocytic receptor of dendritic cells, whose ligands include phosphorothioated cytosine-guanosine oligonucleotides, a motif often seen in bacterial or viral DNA. However, despite growing biological and clinical significance, little is known about the structural arrangement of this receptor or any of its family members. Here, we describe the 3.2 Å cryo-EM structure of human DEC-205, thereby illuminating the structure of the mannose receptor protein family. The DEC-205 monomer forms a compact structure comprising two intercalated rings of C-type lectin-like domains, where the N-terminal cysteine-rich and fibronectin domains reside at the central intersection. We establish a pH-dependent oligomerization pathway forming tetrameric DEC-205 using solution-based techniques and ultimately solved the 4.9 Å cryo-EM structure of the DEC-205 tetramer to identify the unfurling of the second lectin ring which enables tetramer formation. Furthermore, we suggest the relevance of this oligomerization pathway within a cellular setting, whereby cytosine-guanosine binding appeared to disrupt this cell-surface oligomer. Accordingly, we provide insight into the structure and oligomeric assembly of the DEC-205 receptor.
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Affiliation(s)
- Benjamin S Gully
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia; Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia.
| | - Hariprasad Venugopal
- Ramaciotti Centre for Cryo Electron Microscopy, Monash University, Melbourne, Victoria, Australia
| | - Alex J Fulcher
- Monash Micro Imaging, Monash University, Clayton, Victoria, Australia
| | - Zhihui Fu
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Jessica Li
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Felix A Deuss
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Carmen Llerena
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - William R Heath
- Department of Microbiology and Immunology, The Peter Doherty Institute, University of Melbourne, Parkville, Victoria, Australia; Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria, Australia
| | - Mireille H Lahoud
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Irina Caminschi
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia; Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia; Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff, United Kingdom.
| | - Richard Berry
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia; Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia.
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16
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Aguilar OA, Tanaka M, Balaji GR, Berry R, Rossjohn J, Lanier LL, Carlyle JR. Tetramer Immunization and Selection Followed by CELLISA Screening to Generate Monoclonal Antibodies against the Mouse Cytomegalovirus m12 Immunoevasin. THE JOURNAL OF IMMUNOLOGY 2020; 205:1709-1717. [PMID: 32817368 DOI: 10.4049/jimmunol.2000687] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 07/19/2020] [Indexed: 12/19/2022]
Abstract
The generation of reliable mAb of unique and desired specificities serves as a valuable technology to study protein expression and function. However, standard approaches to mAb generation usually involve large-scale protein purification and intensive screening. In this study, we describe an optimized high-throughput proof-of-principle method for the expanded generation, enrichment, and screening of mouse hybridomas secreting mAb specific for a protein of interest. Briefly, we demonstrate that small amounts of a biotinylated protein of interest can be used to generate tetramers for use as prime-boost immunogens, followed by selective enrichment of Ag-specific B cells by magnetic sorting using the same tetramers prior to hybridoma generation. This serves two purposes: 1) to effectively expand both low- and high-affinity B cells specific for the antigenic bait during immunization and 2) to minimize subsequent laborious hybridoma efforts by positive selection of Ag-specific, Ab-secreting cells prior to hybridoma fusion and validation screening. Finally, we employ a rapid and inexpensive screening technology, CELLISA, a high-throughput validation method that uses a chimeric Ag fused to the CD3ζ signaling domain expressed on enzyme-generating reporter cells; these reporters can detect specific mAb in hybridoma supernatants via plate-bound Ab-capture arrays, thereby easing screening. Using this strategy, we generated and characterized novel mouse mAb specific for a viral immunoevasin, the mouse CMV m12 protein, and suggest that these mAb may protect mice from CMV infection via passive immunity.
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Affiliation(s)
- Oscar A Aguilar
- Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada; .,Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143.,Parker Institute for Cancer Immunotherapy, University of California, San Francisco, San Francisco, CA 94143
| | - Miho Tanaka
- Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada.,Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143
| | - Gautham R Balaji
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia; and
| | - Richard Berry
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia; and
| | - Jamie Rossjohn
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia; and.,Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XN, United Kingdom
| | - Lewis L Lanier
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143.,Parker Institute for Cancer Immunotherapy, University of California, San Francisco, San Francisco, CA 94143
| | - James R Carlyle
- Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada;
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17
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Abstract
Sensing tissue damage is an ancient function of immune cells that is central to the regulation of inflammation, tissue repair, and immunity. In this issue of Immunity, Lai et al. (2020) uncover a role for the C-type lectin receptor Clec2d as a sensor of cell death, which directly detects histones released during necrosis and thus contributes to inflammation and immunopathology.
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Affiliation(s)
- Carlos Del Fresno
- Immunobiology Lab, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid 28029, Spain
| | - David Sancho
- Immunobiology Lab, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid 28029, Spain.
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18
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Sun Y, Malaer JD, Mathew PA. Lectin-like transcript 1 as a natural killer cell-mediated immunotherapeutic target for triple negative breast cancer and prostate cancer. JOURNAL OF CANCER METASTASIS AND TREATMENT 2019; 2019:80. [PMID: 34322598 PMCID: PMC8315106 DOI: 10.20517/2394-4722.2019.29] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Breast and prostate cancer are the leading causes of death in females and males, respectively. Triple negative breast cancer (TNBC) does not express the estrogen receptor, progesterone receptor, or human epidermal growth factor receptor 2, resulting in limited treatment options. Androgen deprivation therapy is the standard care for prostate cancer patients; however, metastasis and recurrence are seen in androgen-independent prostate cancer. Both prostate and breast cancer show higher resistance after recurrence and metastasis, which increases the difficulty of treatment. Natural killer (NK) cells play a critical role during innate immunity and tumor recognition and elimination. NK cell function is determined by a delicate balance of inhibitory signals and activation signals received through cell surface receptors. Lectin-like transcript 1 (LLT1, CLEC2D, OCIL) is a ligand of NK cell inhibitory receptor NKRP1A (CD161). Several studies have that reported higher expression of LLT1 is associated with the development of various tumors. Our studies revealed that TNBC and prostate cancer cells express higher levels of LLT1. In the presence of a monoclonal antibody against LLT1, NK cell-mediated killing of TNBC and prostate cancer cells were greatly enhanced. This review highlights the potential that using monoclonal antibodies to block LLT1 - NKRP1A interactions could be an effective immunotherapeutic approach to treat triple negative breast cancer and prostate cancer.
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Affiliation(s)
- Yuanhong Sun
- Department of Microbiology, Immunology and Genetics, University of North Texas Health Science Center, Fort Worth, Texas 76107, USA
| | - Joseph D Malaer
- Department of Microbiology, Immunology and Genetics, University of North Texas Health Science Center, Fort Worth, Texas 76107, USA
| | - Porunelloor A Mathew
- Department of Microbiology, Immunology and Genetics, University of North Texas Health Science Center, Fort Worth, Texas 76107, USA
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19
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Ly49R activation receptor drives self-MHC-educated NK cell immunity against cytomegalovirus infection. Proc Natl Acad Sci U S A 2019; 116:26768-26778. [PMID: 31843910 DOI: 10.1073/pnas.1913064117] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Natural killer (NK) cells mediate vital control of cancer and viral infection. They rely on MHC class I (MHC I)-specific self-receptors to identify and lyse diseased cells without harming self-MHC I-bearing host cells. NK cells bearing inhibitory self-receptors for host MHC I also undergo education, referred to as licensing, which causes them to become more responsive to stimulation via activation receptor signaling. Previous work has shown that licensed NK cells selectively expand during virus infections and they are associated with improved clinical response in human patients experiencing certain chronic virus infections, including HIV and hepatitis C virus. However, the importance of inhibitory self-receptors in NK-mediated virus immunity is debated as they also limit signals in NK cells emanating from virus-specific activation receptors. Using a mouse model of MHC I-dependent (H-2Dk) virus immunity, we discovered that NK cells depend on the Ly49G2 inhibitory self-receptor to mediate virus control, which coincided with host survival during murine cytomegalovirus infection. This antiviral effect further requires active signaling in NK cells via the Ly49R activation receptor that also binds H-2Dk In tandem, these functionally discordant Ly49 self-receptors increase NK cell proliferation and effector activity during infection, resulting in selective up-regulation of CD25 and KLRG1 in virus-specific Ly49R+ Ly49G2+ NK cells. Our findings establish that paired self-receptors act as major determinants of NK cell-mediated virus sensing and immunity.
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20
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Mouse Cytomegalovirus m153 Protein Stabilizes Expression of the Inhibitory NKR-P1B Ligand Clr-b. J Virol 2019; 94:JVI.01220-19. [PMID: 31597762 DOI: 10.1128/jvi.01220-19] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 10/01/2019] [Indexed: 12/16/2022] Open
Abstract
Natural killer (NK) cells are a subset of innate lymphoid cells (ILC) capable of recognizing stressed and infected cells through multiple germ line-encoded receptor-ligand interactions. Missing-self recognition involves NK cell sensing of the loss of host-encoded inhibitory ligands on target cells, including MHC class I (MHC-I) molecules and other MHC-I-independent ligands. Mouse cytomegalovirus (MCMV) infection promotes a rapid host-mediated loss of the inhibitory NKR-P1B ligand Clr-b (encoded by Clec2d) on infected cells. Here we provide evidence that an MCMV m145 family member, m153, functions to stabilize cell surface Clr-b during MCMV infection. Ectopic expression of m153 in fibroblasts augments Clr-b cell surface levels. Moreover, infections using m153-deficient MCMV mutants (Δm144-m158 and Δm153) show an accelerated and exacerbated Clr-b downregulation. Importantly, enhanced loss of Clr-b during Δm153 mutant infection reverts to wild-type levels upon exogenous m153 complementation in fibroblasts. While the effects of m153 on Clr-b levels are independent of Clec2d transcription, imaging experiments revealed that the m153 and Clr-b proteins only minimally colocalize within the same subcellular compartments, and tagged versions of the proteins were refractory to coimmunoprecipitation under mild-detergent conditions. Surprisingly, the Δm153 mutant possesses enhanced virulence in vivo, independent of both Clr-b and NKR-P1B, suggesting that m153 potentially targets additional host factors. Nevertheless, the present data highlight a unique mechanism by which MCMV modulates NK ligand expression.IMPORTANCE Cytomegaloviruses are betaherpesviruses that in immunocompromised individuals can lead to severe pathologies. These viruses encode various gene products that serve to evade innate immune recognition. NK cells are among the first immune cells that respond to CMV infection and use germ line-encoded NK cell receptors (NKR) to distinguish healthy from virus-infected cells. One such axis that plays a critical role in NK recognition involves the inhibitory NKR-P1B receptor, which engages the host ligand Clr-b, a molecule commonly lost on stressed cells ("missing-self"). In this study, we discovered that mouse CMV utilizes the m153 glycoprotein to circumvent host-mediated Clr-b downregulation, in order to evade NK recognition. These results highlight a novel MCMV-mediated immune evasion strategy.
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21
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Production of recombinant soluble dimeric C-type lectin-like receptors of rat natural killer cells. Sci Rep 2019; 9:17836. [PMID: 31780667 PMCID: PMC6882821 DOI: 10.1038/s41598-019-52114-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 10/14/2019] [Indexed: 12/02/2022] Open
Abstract
Working at the border between innate and adaptive immunity, natural killer (NK) cells play a key role in the immune system by protecting healthy cells and by eliminating malignantly transformed, stressed or virally infected cells. NK cell recognition of a target cell is mediated by a receptor “zipper” consisting of various activating and inhibitory receptors, including C-type lectin-like receptors. Among this major group of receptors, two of the largest rodent receptor families are the NKR-P1 and the Clr receptor families. Although these families have been shown to encode receptor-ligand pairs involved in MHC-independent self-nonself discrimination and are a target for immune evasion by tumour cells and viruses, structural mechanisms of their mutual recognition remain less well characterized. Therefore, we developed a non-viral eukaryotic expression system based on transient transfection of suspension-adapted human embryonic kidney 293 cells to produce soluble native disulphide dimers of NK cell C-type lectin-like receptor ectodomains. The expression system was optimized using green fluorescent protein and secreted alkaline phosphatase, easily quantifiable markers of recombinant protein production. We describe an application of this approach to the recombinant protein production and characterization of native rat NKR-P1B and Clr-11 proteins suitable for further structural and functional studies.
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22
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Daniels KA, O'Donnell CL, Castonguay C, Strutt TM, McKinstry KK, Swain SL, Welsh RM. Virus-induced natural killer cell lysis of T cell subsets. Virology 2019; 539:26-37. [PMID: 31670188 DOI: 10.1016/j.virol.2019.10.003] [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: 08/02/2019] [Revised: 09/24/2019] [Accepted: 10/08/2019] [Indexed: 12/18/2022]
Abstract
In addition to direct anti-viral activity, NK cells regulate viral pathogenesis by virtue of their cytolytic attack on activated CD4 and CD8 T cells. To gain insight into which differentiated T cell subsets are preferred NK targets, transgenic T cells were differentiated in vitro into Th0, Th1, Th2, Th17, Treg, Tc1, and Tc2 effector cells and then tested for lysis by enriched populations of lymphocytic choriomeningitis virus (LCMV)-induced activated NK cells. There was a distinct hierarchy of cytotoxicity in vitro and in vivo, with Treg, Th17, and Th2 cells being more sensitive and Th0 and Th1 cells more resistant. Some distinctions between in vitro vs in vivo generated T cells were explainable by type 1 interferon induction of class 1 histocompatibility antigens on the effector T cell subsets. NK receptor (NKR)-deficient mice and anti-NKR antibody studies identified no one essential NKR for killing, though there could be redundancies.
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Affiliation(s)
- Keith A Daniels
- Department of Pathology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA, 01605, USA
| | - Carey L O'Donnell
- Department of Pathology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA, 01605, USA
| | - Catherine Castonguay
- Department of Pathology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA, 01605, USA
| | - Tara M Strutt
- Immunity and Pathogenesis Division, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, 32827, USA; NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, USA
| | - K Kai McKinstry
- Immunity and Pathogenesis Division, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, 32827, USA; NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, USA
| | - Susan L Swain
- Department of Pathology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA, 01605, USA
| | - Raymond M Welsh
- Department of Pathology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA, 01605, USA.
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23
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Adámková L, Kvíčalová Z, Rozbeský D, Kukačka Z, Adámek D, Cebecauer M, Novák P. Oligomeric Architecture of Mouse Activating Nkrp1 Receptors on Living Cells. Int J Mol Sci 2019; 20:ijms20081884. [PMID: 30995786 PMCID: PMC6515139 DOI: 10.3390/ijms20081884] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/04/2019] [Accepted: 04/10/2019] [Indexed: 12/03/2022] Open
Abstract
Mouse activating Nkrp1 proteins are commonly described as type II transmembrane receptors with disulfide-linked homodimeric structure. Their function and the manner in which Nkrp1 proteins of mouse strain (C57BL/6) oligomerize are still poorly understood. To assess the oligomerization state of Nkrp1 proteins, mouse activating EGFP-Nkrp1s were expressed in mammalian lymphoid cells and their oligomerization evaluated by Förster resonance energy transfer (FRET). Alternatively, Nkrp1s oligomers were detected by Western blotting to specify the ratio between monomeric and dimeric forms. We also performed structural characterization of recombinant ectodomains of activating Nkrp1 receptors. Nkrp1 isoforms c1, c2 and f were expressed prevalently as homodimers, whereas the Nkrp1a displays larger proportion of monomers on the cell surface. Cysteine-to-serine mutants revealed the importance of all stalk cysteines for protein dimerization in living cells with a major influence of cysteine at position 74 in two Nkrp1 protein isoforms. Our results represent a new insight into the oligomerization of Nkrp1 receptors on lymphoid cells, which will help to determine their function.
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Affiliation(s)
- Ljubina Adámková
- Laboratory of Structural Biology and Cell Signaling, Institute of Microbiology, The Czech Academy of Sciences, Vídeňská 1083, 14220 Prague 4, Czech Republic.
| | - Zuzana Kvíčalová
- Department of Biophysical Chemistry, J. Heyrovsky Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejškova 2155/3, 18223 Prague 8, Czech Republic.
| | - Daniel Rozbeský
- Laboratory of Structural Biology and Cell Signaling, Institute of Microbiology, The Czech Academy of Sciences, Vídeňská 1083, 14220 Prague 4, Czech Republic.
| | - Zdeněk Kukačka
- Laboratory of Structural Biology and Cell Signaling, Institute of Microbiology, The Czech Academy of Sciences, Vídeňská 1083, 14220 Prague 4, Czech Republic.
| | - David Adámek
- Laboratory of Structural Biology and Cell Signaling, Institute of Microbiology, The Czech Academy of Sciences, Vídeňská 1083, 14220 Prague 4, Czech Republic.
| | - Marek Cebecauer
- Department of Biophysical Chemistry, J. Heyrovsky Institute of Physical Chemistry, The Czech Academy of Sciences, Dolejškova 2155/3, 18223 Prague 8, Czech Republic.
| | - Petr Novák
- Laboratory of Structural Biology and Cell Signaling, Institute of Microbiology, The Czech Academy of Sciences, Vídeňská 1083, 14220 Prague 4, Czech Republic.
- Department of Biochemistry, Charles University, Hlavova 8, 12843 Prague 2, Czech Republic.
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24
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Hernychová L, Rosůlek M, Kádek A, Mareška V, Chmelík J, Adámková L, Grobárová V, Šebesta O, Kukačka Z, Skála K, Spiwok V, Černý J, Novák P. The C-type lectin-like receptor Nkrp1b: Structural proteomics reveals features affecting protein conformation and interactions. J Proteomics 2019; 196:162-172. [DOI: 10.1016/j.jprot.2018.11.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 10/31/2018] [Accepted: 11/05/2018] [Indexed: 11/24/2022]
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25
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Chakraborty P, Kuo R, Vervelde L, Dutia BM, Kaiser P, Smith J. Macrophages from Susceptible and Resistant Chicken Lines have Different Transcriptomes following Marek's Disease Virus Infection. Genes (Basel) 2019; 10:genes10020074. [PMID: 30678299 PMCID: PMC6409778 DOI: 10.3390/genes10020074] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 01/10/2019] [Accepted: 01/21/2019] [Indexed: 12/12/2022] Open
Abstract
Despite successful control by vaccination, Marek’s disease (MD) has continued evolving to greater virulence over recent years. To control MD, selection and breeding of MD-resistant chickens might be a suitable option. MHC-congenic inbred chicken lines, 61 and 72, are highly resistant and susceptible to MD, respectively, but the cellular and genetic basis for these phenotypes is unknown. Marek’s disease virus (MDV) infects macrophages, B-cells, and activated T-cells in vivo. This study investigates the cellular basis of resistance to MD in vitro with the hypothesis that resistance is determined by cells active during the innate immune response. Chicken bone marrow-derived macrophages from lines 61 and 72 were infected with MDV in vitro. Flow cytometry showed that a higher percentage of macrophages were infected in line 72 than in line 61. A transcriptomic study followed by in silico functional analysis of differentially expressed genes was then carried out between the two lines pre- and post-infection. Analysis supports the hypothesis that macrophages from susceptible and resistant chicken lines display a marked difference in their transcriptome following MDV infection. Resistance to infection, differential activation of biological pathways, and suppression of oncogenic potential are among host defense strategies identified in macrophages from resistant chickens.
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Affiliation(s)
- Pankaj Chakraborty
- The Roslin Institute and R(D)SVS, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, UK; (P.C.); (R.K.); (L.V.); (B.M.D.)
- Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong 4225, Bangladesh
| | - Richard Kuo
- The Roslin Institute and R(D)SVS, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, UK; (P.C.); (R.K.); (L.V.); (B.M.D.)
| | - Lonneke Vervelde
- The Roslin Institute and R(D)SVS, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, UK; (P.C.); (R.K.); (L.V.); (B.M.D.)
| | - Bernadette M. Dutia
- The Roslin Institute and R(D)SVS, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, UK; (P.C.); (R.K.); (L.V.); (B.M.D.)
| | - Pete Kaiser
- The Roslin Institute and R(D)SVS, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, UK; (P.C.); (R.K.); (L.V.); (B.M.D.)
| | - Jacqueline Smith
- The Roslin Institute and R(D)SVS, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, UK; (P.C.); (R.K.); (L.V.); (B.M.D.)
- Correspondence: ; Tel.: +44-(0)131-6519155
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26
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Balaji GR, Aguilar OA, Tanaka M, Shingu-Vazquez MA, Fu Z, Gully BS, Lanier LL, Carlyle JR, Rossjohn J, Berry R. Recognition of host Clr-b by the inhibitory NKR-P1B receptor provides a basis for missing-self recognition. Nat Commun 2018; 9:4623. [PMID: 30397201 PMCID: PMC6218473 DOI: 10.1038/s41467-018-06989-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 10/09/2018] [Indexed: 01/16/2023] Open
Abstract
The interaction between natural killer (NK) cell inhibitory receptors and their cognate ligands constitutes a key mechanism by which healthy tissues are protected from NK cell-mediated lysis. However, self-ligand recognition remains poorly understood within the prototypical NKR-P1 receptor family. Here we report the structure of the inhibitory NKR-P1B receptor bound to its cognate host ligand, Clr-b. NKR-P1B and Clr-b interact via a head-to-head docking mode through an interface that includes a large array of polar interactions. NKR-P1B:Clr-b recognition is extremely sensitive to mutations at the heterodimeric interface, with most mutations severely impacting both Clr-b binding and NKR-P1B receptor function to implicate a low affinity interaction. Within the structure, two NKR-P1B:Clr-b complexes are cross-linked by a non-classic NKR-P1B homodimer, and the disruption of homodimer formation abrogates Clr-b recognition. These data provide an insight into a fundamental missing-self recognition system and suggest an avidity-based mechanism underpins NKR-P1B receptor function.
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MESH Headings
- Animals
- Carrier Proteins
- Crystallography, X-Ray
- HEK293 Cells
- Humans
- Lectins, C-Type/chemistry
- Lectins, C-Type/genetics
- Mice
- Mice, Inbred C57BL
- Models, Molecular
- Mutagenesis, Site-Directed
- Mutation
- NK Cell Lectin-Like Receptor Subfamily B/chemistry
- NK Cell Lectin-Like Receptor Subfamily B/genetics
- Protein Conformation
- Protein Conformation, alpha-Helical
- Protein Domains
- Receptors, Immunologic/chemistry
- Receptors, Immunologic/genetics
- Receptors, Natural Killer Cell/chemistry
- Receptors, Natural Killer Cell/genetics
- X-Ray Diffraction
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Affiliation(s)
- Gautham R Balaji
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, 3800, Australia
- ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, 3800, Australia
| | - Oscar A Aguilar
- Department of Immunology, University of Toronto, Toronto, ON, M5S 1A8, Canada
- Sunnybrook Research Institute, Toronto, ON, M4N 3M5, Canada
- Department of Microbiology and Immunology, University of California, San Francisco, CA, 94143, USA
- Parker Institute for Cancer Immunotherapy, University of California, San Francisco, CA, 94143, USA
| | - Miho Tanaka
- Department of Immunology, University of Toronto, Toronto, ON, M5S 1A8, Canada
- Sunnybrook Research Institute, Toronto, ON, M4N 3M5, Canada
| | - Miguel A Shingu-Vazquez
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, 3800, Australia
- ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, 3800, Australia
| | - Zhihui Fu
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, 3800, Australia
- ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, 3800, Australia
| | - Benjamin S Gully
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, 3800, Australia
- ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, 3800, Australia
| | - Lewis L Lanier
- Department of Microbiology and Immunology, University of California, San Francisco, CA, 94143, USA
- Parker Institute for Cancer Immunotherapy, University of California, San Francisco, CA, 94143, USA
| | - James R Carlyle
- Department of Immunology, University of Toronto, Toronto, ON, M5S 1A8, Canada.
- Sunnybrook Research Institute, Toronto, ON, M4N 3M5, Canada.
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, 3800, Australia.
- ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, 3800, Australia.
- Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff, CF14 4XN, UK.
| | - Richard Berry
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, 3800, Australia.
- ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, 3800, Australia.
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27
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Geary CD, Krishna C, Lau CM, Adams NM, Gearty SV, Pritykin Y, Thomsen AR, Leslie CS, Sun JC. Non-redundant ISGF3 Components Promote NK Cell Survival in an Auto-regulatory Manner during Viral Infection. Cell Rep 2018; 24:1949-1957.e6. [PMID: 30134157 PMCID: PMC6153266 DOI: 10.1016/j.celrep.2018.07.060] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 06/05/2018] [Accepted: 07/17/2018] [Indexed: 01/14/2023] Open
Abstract
Natural killer (NK) cells are innate lymphocytes that possess adaptive features, including antigen-specific clonal expansion and long-lived memory responses. Although previous work demonstrated that type I interferon (IFN) signaling is crucial for NK cell expansion and memory cell formation following mouse cytomegalovirus (MCMV) infection, the global transcriptional mechanisms underlying type I IFN-mediated responses remained to be determined. Here, we demonstrate that among the suite of transcripts induced in activated NK cells, IFN-α is necessary and sufficient to promote expression of its downstream transcription factors STAT1, STAT2, and IRF9, via an auto-regulatory, feedforward loop. Similar to STAT1 deficiency, we show that STAT2- or IRF9-deficient NK cells are defective in their ability to expand following MCMV infection, in part because of diminished survival rather than an inability to proliferate. Thus, our findings demonstrate that individual ISGF3 components are crucial cell-autonomous and non-redundant regulators of the NK cell response to viral infection.
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Affiliation(s)
- Clair D Geary
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Chirag Krishna
- Computational and Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Colleen M Lau
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Nicholas M Adams
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Louis V. Gerstner, Jr. Graduate School of Biomedical Sciences, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Sofia V Gearty
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Yuri Pritykin
- Computational and Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Allan R Thomsen
- Department of Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
| | - Christina S Leslie
- Computational and Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Joseph C Sun
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Louis V. Gerstner, Jr. Graduate School of Biomedical Sciences, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Immunology and Microbial Pathogenesis, Weill Cornell Medical College, New York, NY 10065, USA.
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28
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Tanaka M, Fine JH, Kirkham CL, Aguilar OA, Belcheva A, Martin A, Ketela T, Moffat J, Allan DSJ, Carlyle JR. The Inhibitory NKR-P1B:Clr-b Recognition Axis Facilitates Detection of Oncogenic Transformation and Cancer Immunosurveillance. Cancer Res 2018; 78:3589-3603. [PMID: 29691253 DOI: 10.1158/0008-5472.can-17-1688] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 11/01/2017] [Accepted: 04/19/2018] [Indexed: 11/16/2022]
Abstract
Natural killer (NK) cells express receptors specific for MHC class I (MHC-I) molecules involved in "missing-self" recognition of cancer and virus-infected cells. Here we elucidate the role of MHC-I-independent NKR-P1B:Clr-b interactions in the detection of oncogenic transformation by NK cells. Ras oncogene overexpression was found to promote a real-time loss of Clr-b on mouse fibroblasts and leukemia cells, mediated in part via the Raf/MEK/ERK and PI3K pathways. Ras-driven Clr-b downregulation occurred at the level of the Clrb (Clec2d) promoter, nascent Clr-b transcripts, and cell surface Clr-b protein, in turn promoting missing-self recognition via the NKR-P1B inhibitory receptor. Both Ras- and c-Myc-mediated Clr-b loss selectively augmented cytotoxicity of oncogene-transformed leukemia cells by NKR-P1B+ NK cells in vitro and enhanced rejection by WT mice in vivo Interestingly, genetic ablation of either one (Clr-b+/-) or two Clr-b alleles (Clr-b-/-) enhanced survival of Eμ-cMyc transgenic mice in a primary lymphoma model despite preferential rejection of Clr-b-/- hematopoietic cells previously observed following adoptive transfer into naïve wild-type mice in vivo Collectively, these findings suggest that the inhibitory NKR-P1B:Clr-b axis plays a beneficial role in innate detection of oncogenic transformation via NK-cell-mediated cancer immune surveillance, in addition to a pathologic role in the immune escape of primary lymphoma cells in Eμ-cMyc mice in vivo These results provide a model for the human NKR-P1A:LLT1 system in cancer immunosurveillance in patients with lymphoma and suggest it may represent a target for immune checkpoint therapy.Significance: A mouse model shows that an MHC-independent NK-cell recognition axis enables the detection of leukemia cells, with implications for a novel immune checkpoint therapy target in human lymphoma. Cancer Res; 78(13); 3589-603. ©2018 AACR.
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Affiliation(s)
- Miho Tanaka
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada.,Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Jason H Fine
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada.,Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Christina L Kirkham
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada.,Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Oscar A Aguilar
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada.,Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Antoaneta Belcheva
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Alberto Martin
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Troy Ketela
- Department of Molecular Genetics, University of Toronto, Ontario, Canada.,Donnelly Centre and Banting and Best Department of Medical Research, University of Toronto, Ontario, Canada
| | - Jason Moffat
- Department of Molecular Genetics, University of Toronto, Ontario, Canada.,Donnelly Centre and Banting and Best Department of Medical Research, University of Toronto, Ontario, Canada
| | - David S J Allan
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada.,Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - James R Carlyle
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada. .,Sunnybrook Research Institute, Toronto, Ontario, Canada
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29
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Zhang H, Li HS, Hillmer EJ, Zhao Y, Chrisikos TT, Hu H, Wu X, Thompson EJ, Clise-Dwyer K, Millerchip KA, Wei Y, Puebla-Osorio N, Kaushik S, Santos MA, Wang B, Garcia-Manero G, Wang J, Sun SC, Watowich SS. Genetic rescue of lineage-balanced blood cell production reveals a crucial role for STAT3 antiinflammatory activity in hematopoiesis. Proc Natl Acad Sci U S A 2018; 115:E2311-E2319. [PMID: 29463696 PMCID: PMC5878002 DOI: 10.1073/pnas.1713889115] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Blood cell formation must be appropriately maintained throughout life to provide robust immune function, hemostasis, and oxygen delivery to tissues, and to prevent disorders that result from over- or underproduction of critical lineages. Persistent inflammation deregulates hematopoiesis by damaging hematopoietic stem and progenitor cells (HSPCs), leading to elevated myeloid cell output and eventual bone marrow failure. Nonetheless, antiinflammatory mechanisms that protect the hematopoietic system are understudied. The transcriptional regulator STAT3 has myriad roles in HSPC-derived populations and nonhematopoietic tissues, including a potent antiinflammatory function in differentiated myeloid cells. STAT3 antiinflammatory activity is facilitated by STAT3-mediated transcriptional repression of Ube2n, which encodes the E2 ubiquitin-conjugating enzyme Ubc13 involved in proinflammatory signaling. Here we demonstrate a crucial role for STAT3 antiinflammatory activity in preservation of HSPCs and lineage-balanced hematopoiesis. Conditional Stat3 removal from the hematopoietic system led to depletion of the bone marrow lineage- Sca-1+ c-Kit+ CD150+ CD48- HSPC subset (LSK CD150+ CD48- cells), myeloid-skewed hematopoiesis, and accrual of DNA damage in HSPCs. These responses were accompanied by intrinsic transcriptional alterations in HSPCs, including deregulation of inflammatory, survival and developmental pathways. Concomitant Ube2n/Ubc13 deletion from Stat3-deficient hematopoietic cells enabled lineage-balanced hematopoiesis, mitigated depletion of bone marrow LSK CD150+ CD48- cells, alleviated HSPC DNA damage, and corrected a majority of aberrant transcriptional responses. These results indicate an intrinsic protective role for STAT3 in the hematopoietic system, and suggest that this is mediated by STAT3-dependent restraint of excessive proinflammatory signaling via Ubc13 modulation.
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Affiliation(s)
- Huiyuan Zhang
- Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Haiyan S Li
- Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Emily J Hillmer
- Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Yang Zhao
- Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Taylor T Chrisikos
- Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX 77030
- The University of Texas Graduate School of Biomedical Sciences, Houston, TX 77030
| | - Hongbo Hu
- Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Xiao Wu
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Erika J Thompson
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Karen Clise-Dwyer
- Department of Stem Cell Transplantation Research, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Karen A Millerchip
- Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Yue Wei
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Nahum Puebla-Osorio
- Department of Lymphoma and Myeloma, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Saakshi Kaushik
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Margarida A Santos
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Bin Wang
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | | | - Jing Wang
- Department of Bioinformatics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, TX 77030
| | - Shao-Cong Sun
- Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX 77030
- The University of Texas Graduate School of Biomedical Sciences, Houston, TX 77030
| | - Stephanie S Watowich
- Department of Immunology, University of Texas MD Anderson Cancer Center, Houston, TX 77030;
- The University of Texas Graduate School of Biomedical Sciences, Houston, TX 77030
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30
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Friede ME, Leibelt S, Dudziak D, Steinle A. Select Clr-g Expression on Activated Dendritic Cells Facilitates Cognate Interaction with a Minor Subset of Splenic NK Cells Expressing the Inhibitory Nkrp1g Receptor. THE JOURNAL OF IMMUNOLOGY 2017; 200:983-996. [DOI: 10.4049/jimmunol.1701180] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 11/13/2017] [Indexed: 11/19/2022]
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31
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Aguilar OA, Berry R, Rahim MMA, Reichel JJ, Popović B, Tanaka M, Fu Z, Balaji GR, Lau TNH, Tu MM, Kirkham CL, Mahmoud AB, Mesci A, Krmpotić A, Allan DSJ, Makrigiannis AP, Jonjić S, Rossjohn J, Carlyle JR. A Viral Immunoevasin Controls Innate Immunity by Targeting the Prototypical Natural Killer Cell Receptor Family. Cell 2017; 169:58-71.e14. [PMID: 28340350 DOI: 10.1016/j.cell.2017.03.002] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 01/09/2017] [Accepted: 02/27/2017] [Indexed: 11/20/2022]
Abstract
Natural killer (NK) cells play a key role in innate immunity by detecting alterations in self and non-self ligands via paired NK cell receptors (NKRs). Despite identification of numerous NKR-ligand interactions, physiological ligands for the prototypical NK1.1 orphan receptor remain elusive. Here, we identify a viral ligand for the inhibitory and activating NKR-P1 (NK1.1) receptors. This murine cytomegalovirus (MCMV)-encoded protein, m12, restrains NK cell effector function by directly engaging the inhibitory NKR-P1B receptor. However, m12 also interacts with the activating NKR-P1A/C receptors to counterbalance m12 decoy function. Structural analyses reveal that m12 sequesters a large NKR-P1 surface area via a "polar claw" mechanism. Polymorphisms in, and ablation of, the viral m12 protein and host NKR-P1B/C alleles impact NK cell responses in vivo. Thus, we identify the long-sought foreign ligand for this key immunoregulatory NKR family and reveal how it controls the evolutionary balance of immune recognition during host-pathogen interplay.
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Affiliation(s)
- Oscar A Aguilar
- Department of Immunology, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Richard Berry
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia
| | - Mir Munir A Rahim
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Johanna J Reichel
- Department of Histology and Embryology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia
| | - Branka Popović
- Department of Histology and Embryology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia
| | - Miho Tanaka
- Department of Immunology, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Zhihui Fu
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Gautham R Balaji
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia
| | - Timothy N H Lau
- Department of Immunology, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Megan M Tu
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Christina L Kirkham
- Department of Immunology, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Ahmad Bakur Mahmoud
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada; College of Applied Medical Sciences, Taibah University, 30001 Madinah Munawwarah, Kingdom of Saudi Arabia
| | - Aruz Mesci
- Department of Immunology, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Astrid Krmpotić
- Department of Histology and Embryology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia
| | - David S J Allan
- Department of Immunology, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Andrew P Makrigiannis
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada.
| | - Stipan Jonjić
- Department of Histology and Embryology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia.
| | - Jamie Rossjohn
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia; Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK.
| | - James R Carlyle
- Department of Immunology, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada.
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32
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A Murine Herpesvirus Closely Related to Ubiquitous Human Herpesviruses Causes T-Cell Depletion. J Virol 2017; 91:JVI.02463-16. [PMID: 28179532 PMCID: PMC5391440 DOI: 10.1128/jvi.02463-16] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 01/26/2017] [Indexed: 12/14/2022] Open
Abstract
The human roseoloviruses human herpesvirus 6A (HHV-6A), HHV-6B, and HHV-7 comprise the Roseolovirus genus of the human Betaherpesvirinae subfamily. Infections with these viruses have been implicated in many diseases; however, it has been challenging to establish infections with roseoloviruses as direct drivers of pathology, because they are nearly ubiquitous and display species-specific tropism. Furthermore, controlled study of infection has been hampered by the lack of experimental models, and until now, a mouse roseolovirus has not been identified. Herein we describe a virus that causes severe thymic necrosis in neonatal mice, characterized by a loss of CD4+ T cells. These phenotypes resemble those caused by the previously described mouse thymic virus (MTV), a putative herpesvirus that has not been molecularly characterized. By next-generation sequencing of infected tissue homogenates, we assembled a contiguous 174-kb genome sequence containing 128 unique predicted open reading frames (ORFs), many of which were most closely related to herpesvirus genes. Moreover, the structure of the virus genome and phylogenetic analysis of multiple genes strongly suggested that this virus is a betaherpesvirus more closely related to the roseoloviruses, HHV-6A, HHV-6B, and HHV-7, than to another murine betaherpesvirus, mouse cytomegalovirus (MCMV). As such, we have named this virus murine roseolovirus (MRV) because these data strongly suggest that MRV is a mouse homolog of HHV-6A, HHV-6B, and HHV-7.IMPORTANCE Herein we describe the complete genome sequence of a novel murine herpesvirus. By sequence and phylogenetic analyses, we show that it is a betaherpesvirus most closely related to the roseoloviruses, human herpesviruses 6A, 6B, and 7. These data combined with physiological similarities with human roseoloviruses collectively suggest that this virus is a murine roseolovirus (MRV), the first definitively described rodent roseolovirus, to our knowledge. Many biological and clinical ramifications of roseolovirus infection in humans have been hypothesized, but studies showing definitive causative relationships between infection and disease susceptibility are lacking. Here we show that MRV infects the thymus and causes T-cell depletion, suggesting that other roseoloviruses may have similar properties.
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33
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Kirkham CL, Aguilar OA, Yu T, Tanaka M, Mesci A, Chu KL, Fine JH, Mossman KL, Bremner R, Allan DSJ, Carlyle JR. Interferon-Dependent Induction of Clr-b during Mouse Cytomegalovirus Infection Protects Bystander Cells from Natural Killer Cells via NKR-P1B-Mediated Inhibition. J Innate Immun 2017; 9:343-358. [PMID: 28288457 DOI: 10.1159/000454926] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 12/05/2016] [Indexed: 01/17/2023] Open
Abstract
Natural killer (NK) cells are innate lymphocytes that aid in self-nonself discrimination by recognizing cells undergoing pathological alterations. The NKR-P1B inhibitory receptor recognizes Clr-b, a self-encoded marker of cell health downregulated during viral infection. Here, we show that Clr-b loss during mouse cytomegalovirus (MCMV) infection is predicated by a loss of Clr-b (Clec2d) promoter activity and nascent transcripts, driven in part by MCMV ie3 (M122) activity. In contrast, uninfected bystander cells near MCMV-infected fibroblasts reciprocally upregulate Clr-b expression due to paracrine type-I interferon (IFN) signaling. Exposure of fibroblasts to type-I IFN augments Clec2d promoter activity and nascent Clr-b transcripts, dependent upon a cluster of IRF3/7/9 motifs located ∼200 bp upstream of the transcriptional start site. Cells deficient in type-I IFN signaling components revealed IRF9 and STAT1 as key transcription factors involved in Clr-b upregulation. In chromatin immunoprecipitation experiments, the Clec2d IRF cluster recruited STAT2 upon IFN-α exposure, confirming the involvement of ISGF3 (IRF9/STAT1/STAT2) in positively regulating the Clec2d promoter. These findings demonstrate that Clr-b is an IFN-stimulated gene on healthy bystander cells, in addition to a missing-self marker on MCMV-infected cells, and thereby enhances the dynamic range of innate self-nonself discrimination by NK cells.
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Affiliation(s)
- Christina L Kirkham
- Department of Immunology, University of Toronto, and Sunnybrook Research Institute, Toronto, ON, Canada
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34
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Rutkowski E, Leibelt S, Born C, Friede ME, Bauer S, Weil S, Koch J, Steinle A. Clr-a: A Novel Immune-Related C-Type Lectin-like Molecule Exclusively Expressed by Mouse Gut Epithelium. THE JOURNAL OF IMMUNOLOGY 2016; 198:916-926. [PMID: 27956531 DOI: 10.4049/jimmunol.1600666] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 11/14/2016] [Indexed: 11/19/2022]
Abstract
The mouse gut epithelium represents a constitutively challenged environment keeping intestinal commensal microbiota at bay and defending against invading enteric pathogens. The complex immunoregulatory network of the epithelial barrier surveillance also involves NK gene complex (NKC)-encoded C-type lectin-like molecules such as NKG2D and Nkrp1 receptors. To our knowledge, in this study, we report the first characterization of the orphan C-type lectin-like molecule Clr-a encoded by the Clec2e gene in the mouse NKC. Screening of a panel of mouse tissues revealed that Clec2e transcripts are restricted to the gastrointestinal tract. Using Clr-a-specific mAb, we characterize Clr-a as a disulfide-linked homodimeric cell surface glycoprotein. Of note, a substantial fraction of Clr-a molecules are retained intracellularly, and analyses of Clr-a/Clr-f hybrids attribute intracellular retention to both the stalk region and parts of the cytoplasmic domain. Combining quantitative PCR analyses with immunofluorescence studies revealed exclusive expression of Clr-a by intestinal epithelial cells and crypt cells throughout the gut. Challenge with polyinosinic-polycytidylic acid results in a rapid and strong downregulation of intestinal Clr-a expression in contrast to the upregulation of Clr-f, a close relative of Clr-a, that also is specifically expressed by the intestinal epithelium and acts as a ligand of the inhibitory Nkrp1g receptor. Collectively, we characterize expression of the mouse NKC-encoded glycoprotein Clr-a as strictly associated with mouse intestinal epithelium. Downregulation upon polyinosinic-polycytidylic acid challenge and expression by crypt cells clearly distinguish Clr-a from the likewise intestinal epithelium-restricted Clr-f, pointing to a nonredundant function of these highly related C-type lectin-like molecules in the context of intestinal immunosurveillance.
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Affiliation(s)
- Emilia Rutkowski
- Institute for Molecular Medicine, Johann Wolfgang Goethe University Frankfurt am Main, 60590 Frankfurt am Main, Germany
| | - Stefan Leibelt
- Institute for Molecular Medicine, Johann Wolfgang Goethe University Frankfurt am Main, 60590 Frankfurt am Main, Germany
| | - Christina Born
- Institute for Molecular Medicine, Johann Wolfgang Goethe University Frankfurt am Main, 60590 Frankfurt am Main, Germany
| | - Miriam E Friede
- Institute for Molecular Medicine, Johann Wolfgang Goethe University Frankfurt am Main, 60590 Frankfurt am Main, Germany
| | - Stefan Bauer
- Institute for Immunology, Philipps University Marburg, 35043 Marburg, Germany
| | - Sandra Weil
- Institute of Medical Microbiology and Hygiene, University of Mainz Medical Center, 55131 Mainz, Germany; and.,Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, 60596 Frankfurt am Main, Germany
| | - Joachim Koch
- Institute of Medical Microbiology and Hygiene, University of Mainz Medical Center, 55131 Mainz, Germany; and.,Institute for Tumor Biology and Experimental Therapy, Georg-Speyer-Haus, 60596 Frankfurt am Main, Germany
| | - Alexander Steinle
- Institute for Molecular Medicine, Johann Wolfgang Goethe University Frankfurt am Main, 60590 Frankfurt am Main, Germany;
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35
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Jansen CA, van Haarlem DA, Sperling B, van Kooten PJ, de Vries E, Viertlboeck BC, Vervelde L, Göbel TW. Identification of an Activating Chicken Ig-like Receptor Recognizing Avian Influenza Viruses. THE JOURNAL OF IMMUNOLOGY 2016; 197:4696-4703. [PMID: 27821665 DOI: 10.4049/jimmunol.1600401] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 10/12/2016] [Indexed: 01/15/2023]
Abstract
Chicken Ig-like receptors (CHIRs) represent a multigene family encoded by the leukocyte receptor complex that encodes a variety of receptors that are subdivided into activating CHIR-A, inhibitory CHIR-B, and bifunctional CHIR-AB. Apart from CHIR-AB, which functions as an Fc receptor, CHIR ligands are unknown. In the current study, we used a panel of different BWZ.36 CHIR reporter cells to identify an interaction between specific CHIRs and avian influenza virus (AIV). The specificity of the CHIR-AIV interaction was further demonstrated using CHIR fusion proteins that bound to AIV-coated plates and were able to reduce the interaction of reporter cells with AIV. There was no difference in binding of CHIR to different AIV strains. Furthermore, CHIR fusion proteins reduced AIV-induced in vitro activation of NK cells obtained from lungs of AIV-infected animals, as judged by the lower frequency of CD107+ cells. Because the original CHIR reporter lines were generated based on sequence information about extracellular CHIR domains, we next identified a full-length CHIR that displayed similar binding to AIV. The sequence analysis identified this CHIR as a CHIR-A. Neuraminidase treatment of coated CHIR-human Ig proteins reduced binding of trimeric H5 proteins to CHIR. This suggests that the interaction is dependent on sialic acid moieties on the receptor. In conclusion, this article identifies AIV as a ligand of CHIR-A and describes the functional consequences of this interaction.
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Affiliation(s)
- Christine A Jansen
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584 CL Utrecht, the Netherlands; and
| | - Daphne A van Haarlem
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584 CL Utrecht, the Netherlands; and
| | - Beatrice Sperling
- Institute for Animal Physiology, Department of Veterinary Sciences, Ludwig Maximilian University Munich, 80539 Munich, Germany
| | - Peter J van Kooten
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584 CL Utrecht, the Netherlands; and
| | - Erik de Vries
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584 CL Utrecht, the Netherlands; and
| | - Birgit C Viertlboeck
- Institute for Animal Physiology, Department of Veterinary Sciences, Ludwig Maximilian University Munich, 80539 Munich, Germany
| | - Lonneke Vervelde
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584 CL Utrecht, the Netherlands; and
| | - Thomas W Göbel
- Institute for Animal Physiology, Department of Veterinary Sciences, Ludwig Maximilian University Munich, 80539 Munich, Germany
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36
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Multi-functional lectin-like transcript-1: A new player in human immune regulation. Immunol Lett 2016; 177:62-9. [DOI: 10.1016/j.imlet.2016.07.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 07/05/2016] [Accepted: 07/07/2016] [Indexed: 12/31/2022]
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37
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Rahim MMA, Wight A, Mahmoud AB, Aguilar OA, Lee SH, Vidal SM, Carlyle JR, Makrigiannis AP. Expansion and Protection by a Virus-Specific NK Cell Subset Lacking Expression of the Inhibitory NKR-P1B Receptor during Murine Cytomegalovirus Infection. THE JOURNAL OF IMMUNOLOGY 2016; 197:2325-37. [PMID: 27511735 DOI: 10.4049/jimmunol.1600776] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 07/08/2016] [Indexed: 11/19/2022]
Abstract
NK cells play a major role in immune defense against human and murine CMV (MCMV) infection. Although the MCMV genome encodes for MHC class I-homologous decoy ligands for inhibitory NK cell receptors to evade detection, some mouse strains have evolved activating receptors, such as Ly49H, to recognize these ligands and initiate an immune response. In this study, we demonstrate that approximately half of the Ly49H-expressing (Ly49H(+)) NK cells in the spleen and liver of C57BL/6 mice also express the inhibitory NKR-P1B receptor. During MCMV infection, the NKR-P1B(-)Ly49H(+) NK cell subset proliferates to constitute the bulk of the NK cell population. This NK cell subset also confers better protection against MCMV infection compared with the NKR-P1B(+)Ly49H(+) subset. The two populations are composed of cells that differ in their surface expression of receptors such as Ly49C/I and NKG2A/C/E, as well as developmental markers, CD27 and CD11b, and the high-affinity IL-2R (CD25) following infection. Although the NKR-P1B(+) NK cells can produce effector molecules such as IFNs and granzymes, their proliferation is inhibited during infection. A similar phenotype in MCMV-infected Clr-b-deficient mice, which lack the ligand for NKR-P1B, suggests the involvement of ligands other than the host Clr-b. Most interestingly, genetic deficiency of the NKR-P1B, but not Clr-b, results in accelerated virus clearance and recovery from MCMV infection. This study is particularly significant because the mouse NKR-P1B:Clr-b receptor:ligand system represents the closest homolog of the human NKR-P1A:LLT1 system and may have a direct relevance to human CMV infection.
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Affiliation(s)
- Mir Munir A Rahim
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada;
| | - Andrew Wight
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Ahmad Bakur Mahmoud
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada; College of Applied Medical Sciences, Taibah University, 30001 Madinah Munawwarah, Saudi Arabia
| | - Oscar A Aguilar
- Department of Immunology, Sunnybrook Research Institute, University of Toronto, Toronto, Ontario M4N 3M5, Canada; and
| | - Seung-Hwan Lee
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Silvia M Vidal
- Department of Human Genetics, McGill University, Montreal, Quebec H3G 0B1, Canada
| | - James R Carlyle
- Department of Immunology, Sunnybrook Research Institute, University of Toronto, Toronto, Ontario M4N 3M5, Canada; and
| | - Andrew P Makrigiannis
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
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38
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Rozbeský D, Adámek D, Pospíšilová E, Novák P, Chmelík J. Solution structure of the lymphocyte receptor Nkrp1a reveals a distinct conformation of the long loop region as compared to in the crystal structure. Proteins 2016; 84:1304-11. [PMID: 27238500 DOI: 10.1002/prot.25078] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 05/13/2016] [Accepted: 05/20/2016] [Indexed: 11/08/2022]
Abstract
Mouse Nkrp1a receptor is a C-type lectin-like receptor expressed on the surface of natural killer cells that play an important role against virally infected and tumor cells. The recently solved crystal structure of Nkrp1a raises questions about a long loop region which was uniquely extended from the central region in the crystal. To understand the functional significance of the loop, the solution structure of Nkrp1a using nuclear magnetic resonance (NMR) spectroscopy was determined. A notable difference between the crystal and NMR structure of Nkrp1a appears in the conformation of the long loop region. While the extended loop points away from the central core and mediates formation of a domain swapped dimer in the crystal, the solution structure is monomeric with the loop tightly anchored to the central region. The findings described the first solution structure in the Nkrp1 family and revealed intriguing similarities and differences to the crystal structure. Proteins 2016; 84:1304-1311. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Daniel Rozbeský
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - David Adámek
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Eliška Pospíšilová
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Petr Novák
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Josef Chmelík
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Prague, Czech Republic
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Abstract
The concept of co-evolution (or co-adaptation) has a long history, but application at molecular levels (e.g., 'supergenes' in genetics) is more recent, with a consensus definition still developing. One interesting example is the chicken major histocompatibility complex (MHC). In contrast to typical mammals that have many class I and class I-like genes, only two classical class I genes, two CD1 genes and some non-classical Rfp-Y genes are known in chicken, and all are found on the microchromosome that bears the MHC. Rarity of recombination between the closely linked and polymorphic genes encoding classical class I and TAPs allows co-evolution, leading to a single dominantly expressed class I molecule in each MHC haplotype, with strong functional consequences in terms of resistance to infectious pathogens. Chicken tapasin is highly polymorphic, but co-evolution with TAP and class I genes remains unclear. T-cell receptors, natural killer (NK) cell receptors, and CD8 co-receptor genes are found on non-MHC chromosomes, with some evidence for co-evolution of surface residues and number of genes along the avian and mammalian lineages. Over even longer periods, co-evolution has been invoked to explain how the adaptive immune system of jawed vertebrates arose from closely linked receptor, ligand, and antigen-processing genes in the primordial MHC.
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Affiliation(s)
- Jim Kaufman
- Department of Pathology, University of Cambridge, Cambridge, UK.,Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
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40
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Ohta Y, Flajnik MF. Coevolution of MHC genes (LMP/TAP/class Ia, NKT-class Ib, NKp30-B7H6): lessons from cold-blooded vertebrates. Immunol Rev 2016; 267:6-15. [PMID: 26284468 DOI: 10.1111/imr.12324] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Comparative immunology provides the long view of what is conserved across all vertebrate taxa versus what is specific to particular organisms or group of organisms. Regarding the major histocompatibility complex (MHC) and coevolution, three striking cases have been revealed in cold-blooded vertebrates: lineages of class Ia antigen-processing and -presenting genes, evolutionary conservation of NKT-class Ib recognition, and the ancient emergence of the natural cytotoxicity receptor NKp30 and its ligand B7H6. While coevolution of transporter associated with antigen processing (TAP) and class Ia has been documented in endothermic birds and two mammals, lineages of LMP7 are restricted to ectotherms. The unambiguous discovery of natural killer T (NKT) cells in Xenopus demonstrated that NKT cells are not restricted to mammals and are likely to have emerged at the same time in evolution as classical α/β and γ/δ T cells. NK cell receptors evolve at a rapid rate, and orthologues are nearly impossible to identify in different vertebrate classes. By contrast, we have detected NKp30 in all gnathostomes, except in species where it was lost. The recently discovered ligand of NKp30, B7H6, shows strong signs of coevolution with NKp30 throughout evolution, i.e. coincident loss or expansion of both genes in some species. NKp30 also offers an attractive IgSF candidate for the invasion of the RAG transposon, which is believed to have initiated T-cell receptor/immunoglobulin adaptive immunity. Besides reviewing these intriguing features of MHC evolution and coevolution, we offer suggestions for future studies and propose a model for the primordial or proto MHC.
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Affiliation(s)
- Yuko Ohta
- Department of Microbiology and Immunology, University of Maryland Baltimore School of Medicine, Baltimore, MD, USA
| | - Martin F Flajnik
- Department of Microbiology and Immunology, University of Maryland Baltimore School of Medicine, Baltimore, MD, USA
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41
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Turowski V, Sperling B, Hanczaruk MA, Göbel TW, Viertlboeck BC. Chicken TREM-B1, an Inhibitory Ig-Like Receptor Expressed on Chicken Thrombocytes. PLoS One 2016; 11:e0151513. [PMID: 26967520 PMCID: PMC4788293 DOI: 10.1371/journal.pone.0151513] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 02/29/2016] [Indexed: 12/22/2022] Open
Abstract
Triggering receptors expressed on myeloid cells (TREM) form a multigene family of immunoregulatory Ig-like receptors and play important roles in the regulation of innate and adaptive immunity. In chickens, three members of the TREM family have been identified on chromosome 26. One of them is TREM-B1 which possesses two V-set Ig-domains, an uncharged transmembrane region and a long cytoplasmic tail with one ITSM and two ITIMs indicating an inhibitory function. We generated specific monoclonal antibodies by immunizing a Balb/c mouse with a TREM-B1-FLAG transfected BWZ.36 cell line and tested the hybridoma supernatants on TREM-B1-FLAG transfected 2D8 cells. We obtained two different antibodies specific for TREM-B1, mab 7E8 (mouse IgG1) and mab 1E9 (mouse IgG2a) which were used for cell surface staining. Single and double staining of different tissues, including whole blood preparations, revealed expression on thrombocytes. Next we investigated the biochemical properties of TREM-B1 by using the specific mab 1E9 for immunoprecipitation of either lysates of surface biotinylated peripheral blood cells or stably transfected 2D8 cells. Staining with streptavidin coupled horse radish peroxidase revealed a glycosylated monomeric protein of about 50 kDa. Furthermore we used the stably transfected 2D8 cell line for analyzing the cytoplasmic tyrosine based signaling motifs. After pervanadate treatment, we detected phosphorylation of the tyrosine residues and subsequent recruitment of the tyrosine specific protein phosphatase SHP-2, indicating an inhibitory potential for TREM-B1. We also showed the inhibitory effect of TREM-B1 in chicken thrombocytes using a CD107 degranulation assay. Crosslinking of TREM-B1 on activated primary thrombocytes resulted in decreased CD107 surface expression of about 50-70%.
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Affiliation(s)
- Vanessa Turowski
- Institute for Animal Physiology, Department for Veterinary Sciences, University of Munich, Munich, Germany
| | - Beatrice Sperling
- Institute for Animal Physiology, Department for Veterinary Sciences, University of Munich, Munich, Germany
| | - Matthias A. Hanczaruk
- Institute for Animal Physiology, Department for Veterinary Sciences, University of Munich, Munich, Germany
| | - Thomas W. Göbel
- Institute for Animal Physiology, Department for Veterinary Sciences, University of Munich, Munich, Germany
| | - Birgit C. Viertlboeck
- Institute for Animal Physiology, Department for Veterinary Sciences, University of Munich, Munich, Germany
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42
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Llibre A, López-Macías C, Marafioti T, Mehta H, Partridge A, Kanzig C, Rivellese F, Galson JD, Walker LJ, Milne P, Phillips RE, Kelly DF, Freeman GJ, El Shikh ME, Klenerman P, Willberg CB. LLT1 and CD161 Expression in Human Germinal Centers Promotes B Cell Activation and CXCR4 Downregulation. THE JOURNAL OF IMMUNOLOGY 2016; 196:2085-94. [PMID: 26829983 PMCID: PMC4760235 DOI: 10.4049/jimmunol.1502462] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 01/03/2016] [Indexed: 01/08/2023]
Abstract
Germinal centers (GCs) are microanatomical structures critical for the development of high-affinity Abs and B cell memory. They are organized into two zones, light and dark, with coordinated roles, controlled by local signaling. The innate lectin-like transcript 1 (LLT1) is known to be expressed on B cells, but its functional role in the GC reaction has not been explored. In this study, we report high expression of LLT1 on GC-associated B cells, early plasmablasts, and GC-derived lymphomas. LLT1 expression was readily induced via BCR, CD40, and CpG stimulation on B cells. Unexpectedly, we found high expression of the LLT1 ligand, CD161, on follicular dendritic cells. Triggering of LLT1 supported B cell activation, CD83 upregulation, and CXCR4 downregulation. Overall, these data suggest that LLT1–CD161 interactions play a novel and important role in B cell maturation within the GC in humans.
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Affiliation(s)
- Alba Llibre
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford OX1 3SY, United Kindgom
| | - Constantino López-Macías
- Medical Research Unit on Immunochemistry, Specialties Hospital, National Medical Centre "Siglo XXI," Mexican Institute for Social Security, 06720 Mexico City, Mexico
| | - Teresa Marafioti
- Department of Histopathology, University College London, London WC1E 6JJ, United Kingdom
| | - Hema Mehta
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford OX1 3SY, United Kindgom
| | - Amy Partridge
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford OX1 3SY, United Kindgom
| | - Carina Kanzig
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford OX1 3SY, United Kindgom
| | - Felice Rivellese
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom
| | - Jacob D Galson
- Oxford Vaccine Group, Department of Paediatrics, National Institute for Health Research, Oxford Biomedical Research Centre, University of Oxford, Oxford OX3 7LJ, United Kingdom
| | - Lucy J Walker
- Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - Paul Milne
- Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - Rodney E Phillips
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford OX1 3SY, United Kindgom
| | - Dominic F Kelly
- Oxford Vaccine Group, Department of Paediatrics, National Institute for Health Research, Oxford Biomedical Research Centre, University of Oxford, Oxford OX3 7LJ, United Kingdom
| | - Gordon J Freeman
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215; and
| | - Mohey Eldin El Shikh
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom;
| | - Paul Klenerman
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford OX1 3SY, United Kindgom; Oxford National Institute for Health Research Biomedical Research Centre, Oxford OX3 9DU, United Kingdom
| | - Christian B Willberg
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford OX1 3SY, United Kindgom; Oxford National Institute for Health Research Biomedical Research Centre, Oxford OX3 9DU, United Kingdom
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43
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Miller MM, Taylor RL. Brief review of the chicken Major Histocompatibility Complex: the genes, their distribution on chromosome 16, and their contributions to disease resistance. Poult Sci 2016; 95:375-92. [PMID: 26740135 PMCID: PMC4988538 DOI: 10.3382/ps/pev379] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 11/11/2015] [Indexed: 12/25/2022] Open
Abstract
Nearly all genes presently mapped to chicken chromosome 16 (GGA 16) have either a demonstrated role in immune responses or are considered to serve in immunity by reason of sequence homology with immune system genes defined in other species. The genes are best described in regional units. Among these, the best known is the polymorphic major histocompatibility complex-B (MHC-B) region containing genes for classical peptide antigen presentation. Nearby MHC-B is a small region containing two CD1 genes, which encode molecules known to bind lipid antigens and which will likely be found in chickens to present lipids to specialized T cells, as occurs with CD1 molecules in other species. Another region is the MHC-Y region, separated from MHC-B by an intervening region of tandem repeats. Like MHC-B, MHC-Y is polymorphic. It contains specialized class I and class II genes and c-type lectin-like genes. Yet another region, separated from MHC-Y by the single nucleolar organizing region (NOR) in the chicken genome, contains olfactory receptor genes and scavenger receptor genes, which are also thought to contribute to immunity. The structure, distribution, linkages and patterns of polymorphism in these regions, suggest GGA 16 evolves as a microchromosome devoted to immune defense. Many GGA 16 genes are polymorphic and polygenic. At the moment most disease associations are at the haplotype level. Roles of individual MHC genes in disease resistance are documented in only a very few instances. Provided suitable experimental stocks persist, the availability of increasingly detailed maps of GGA 16 genes combined with new means for detecting genetic variability will lead to investigations defining the contributions of individual loci and more applications for immunogenetics in breeding healthy poultry.
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Affiliation(s)
- Marcia M Miller
- Beckman Research Institute, City of Hope, Department of Molecular and Cellular Biology, Duarte, CA 91010
| | - Robert L Taylor
- Division of Animal and Nutritional Sciences, West Virginia University, Morgantown, WV 26506
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44
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Abstract
Natural killer (NK) cells are immune cells that play a crucial role against viral infections and tumors. To be tolerant against healthy tissue and simultaneously attack infected cells, the activity of NK cells is tightly regulated by a sophisticated array of germline-encoded activating and inhibiting receptors. The best characterized mechanism of NK cell activation is “missing self” detection, i.e., the recognition of virally infected or transformed cells that reduce their MHC expression to evade cytotoxic T cells. To monitor the expression of MHC-I on target cells, NK cells have monomorphic inhibitory receptors which interact with conserved MHC molecules. However, there are other NK cell receptors (NKRs) encoded by gene families showing a remarkable genetic diversity. Thus, NKR haplotypes contain several genes encoding for receptors with activating and inhibiting signaling, and that vary in gene content and allelic polymorphism. But if missing-self detection can be achieved by a monomorphic NKR system why have these polygenic and polymorphic receptors evolved? Here, we review the expansion of NKR receptor families in different mammal species, and we discuss several hypotheses that possibly underlie the diversification of the NK cell receptor complex, including the evolution of viral decoys, peptide sensitivity, and selective MHC-downregulation.
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45
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HERNYCHOVÁ L, MRÁZEK H, IVANOVA L, KUKAČKA Z, CHMELÍK J, NOVÁK P. Recombinant Expression, In Vitro Refolding and Characterizing Disulfide Bonds of a Mouse Inhibitory C-Type Lectin-Like Receptor Nkrp1b. Physiol Res 2015; 64:S85-93. [DOI: 10.33549/physiolres.933136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
As a part of the innate immunity, NK (Natural Killer) cells provide an early immune response to different stimuli, e.g. viral infections and tumor growths. However, their functions are more complex; they play an important role in reproduction, alloimmunity, autoimmunity and allergic diseases. NK cell activities require an intricate system of regulation that is ensured by many different receptors on a cell surface which integrate signals from interacting cells and soluble factors. One way to understand NK cell biology is through the structure of NK receptors, which can reveal ligand binding conditions. We present a modified protocol for recombinant expression in Escherichia coli and in vitro refolding of the ligand-binding domain of the inhibitory Nkrp1b (SJL/J) protein. Nkrp1b identity and folding was confirmed using mass spectrometry (accurate mass of the intact protein and evaluation of disulfide bonds) and one-dimensional nuclear magnetic resonance spectroscopy. The intention is to provide the basis for conducting structural studies of the inhibitory Nkrp1b protein, since only the activating Nkrp1a receptor structure is known.
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Affiliation(s)
- L. HERNYCHOVÁ
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | | | | | | | | | - P. NOVÁK
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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46
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Bauer B, Spreu J, Rohe C, Vogler I, Steinle A. Key residues at the membrane-distal surface of KACL, but not glycosylation, determine the functional interaction of the keratinocyte-specific C-type lectin-like receptor KACL with its high-affinity receptor NKp65. Immunology 2015; 145:114-23. [PMID: 25510854 DOI: 10.1111/imm.12432] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 11/27/2014] [Accepted: 12/02/2014] [Indexed: 11/29/2022] Open
Abstract
Keratinocyte-associated C-type lectin (KACL) is a peculiar C-type lectin-like receptor (CTLR) due to its selective expression by human keratinocytes and cognate interaction with the genetically coupled CTLR NKp65. KACL and NKp65 are members of the CLEC2 and NKRP1 subfamilies of natural killer gene complex (NKC)-encoded CTLR, respectively. Most NKRP1 molecules are expressed on NK cells and T cells and act as receptors of CLEC2 glycoproteins with their genes being intermingled in a certain sub-region of the mammalian NKC. The reasons for the tight genetic linkage of these dedicated receptor/ligand pairs are unknown, as is the physiological expression of NKp65. Recently, we reported that the CTLR NKp65 and KACL interact with high affinity, resulting in activation of NKp65-expressing NK-92MI cells. Here, we address the molecular basis of this high-affinity interaction by analysing KACL mutants with KACL-specific monoclonal antibodies (mAb), soluble NKp65 (sNKp65) and NK-92MI-NKp65 cells. We find that none of the three N-linked carbohydrates of KACL glycoproteins significantly contributes to KACL surface expression and NKp65 interaction. However, KACL mutants with non-conservative amino acid substitutions of arginine 158 or isoleucine 161 abrogated binding of both KACL-specific mAb OMA1 and sNKp65, well in line with the blockade of NKp65-KACL interaction by OMA1. Accordingly, functional recognition of these KACL mutants by NK-92M-NKp65 cells was completely abolished. Arginine 158 and isoleucine 161 located at the membrane-distal surface of KACL were defined as residues, decisively determining functional KACL-NKp65 interaction that is independent of KACL glycosylation.
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Affiliation(s)
- Björn Bauer
- Institute for Molecular Medicine, Goethe-University Frankfurt am Main, Frankfurt am Main, Germany
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47
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Aguilar OA, Mesci A, Ma J, Chen P, Kirkham CL, Hundrieser J, Voigt S, Allan DSJ, Carlyle JR. Modulation of Clr Ligand Expression and NKR-P1 Receptor Function during Murine Cytomegalovirus Infection. J Innate Immun 2015; 7:584-600. [PMID: 26044139 DOI: 10.1159/000382032] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 04/02/2015] [Indexed: 12/19/2022] Open
Abstract
Viruses are known to induce pathological cellular states that render infected cells susceptible or resistant to immune recognition. Here, we characterize an MHC-I-independent natural killer (NK) cell recognition mechanism that involves modulation of inhibitory NKR-P1B:Clr-b receptor-ligand interactions in response to mouse cytomegalovirus (MCMV) infection. We demonstrate that mouse Clr-b expression on healthy cells is rapidly lost at the cell surface and transcript levels in a time- and dose-dependent manner upon MCMV infection. In addition, cross-species infections using rat cytomegalovirus (RCMV) infection of mouse fibroblasts and MCMV infection of rat fibroblasts suggest that this response is conserved during host-pathogen interactions. Active viral infection appears to be necessary for Clr-b loss, as cellular stimulation using UV-inactivated whole virus or agonists of many innate pattern recognition receptors failed to elicit efficient Clr-b downregulation. Notably, Clr-b loss could be partially blocked by titrated cycloheximide treatment, suggesting that early viral or nascent host proteins are required for Clr-b downregulation. Interestingly, reporter cell assays suggest that MCMV may encode a novel Clr-b-independent immunoevasin that functionally engages the NKR-P1B receptor. Together, these data suggest that Clr-b modulation is a conserved innate host cell response to virus infection that is subverted by multiple CMV immune evasion strategies.
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Affiliation(s)
- Oscar A Aguilar
- Department of Immunology, University of Toronto, and Sunnybrook Research Institute, Toronto, Ont., Canada
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48
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Leibelt S, Friede ME, Rohe C, Gütle D, Rutkowski E, Weigert A, Kveberg L, Vaage JT, Hornef MW, Steinle A. Dedicated immunosensing of the mouse intestinal epithelium facilitated by a pair of genetically coupled lectin-like receptors. Mucosal Immunol 2015; 8:232-42. [PMID: 24985083 DOI: 10.1038/mi.2014.60] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 06/03/2014] [Indexed: 02/04/2023]
Abstract
The integrity of the intestinal epithelium is constantly surveyed by a peculiar subset of innate-like T lymphocytes embedded in the epithelial cell layer, hence called intestinal intraepithelial lymphocytes (IELs). IELs are thought to act as "first-line" sentinels sensing the state of adjacent epithelial cells via both T-cell receptors and auxiliary receptors. Auxiliary receptors modulating IEL activity include C-type lectin-like receptors encoded in the natural killer gene complex such as NKG2D. Here, we report that the CTLR Nkrp1g is expressed by a subpopulation of mouse CD103(+) IELs allowing immunosensing of the intestinal epithelium through ligation of the genetically coupled CTLR Clr-f that is almost exclusively expressed on differentiated intestinal epithelial cells (IECs). Most of these Nkrp1g-expressing IELs exhibit a γδTCR(bright)Nkg2a(-) phenotype and are intimately associated with the intestinal epithelium. As Clr-f expression strongly inhibits effector functions of Nkrp1g-expressing cells and is upregulated upon poly(I:C) challenge, Clr-f molecules may quench reactivity of these IELs towards the epithelial barrier that is constantly provoked by microbial and antigenic stimuli. Altogether, we here newly characterize a genetically linked C-type lectin-like receptor/ligand pair with a highly restricted tissue expression that apparently evolved to allow for a dedicated immunosurveillance of the mouse intestinal epithelium.
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Affiliation(s)
- S Leibelt
- Institute for Molecular Medicine, Goethe-University Frankfurt am Main, Frankfurt am Main, Germany
| | - M E Friede
- Institute for Molecular Medicine, Goethe-University Frankfurt am Main, Frankfurt am Main, Germany
| | - C Rohe
- Institute for Molecular Medicine, Goethe-University Frankfurt am Main, Frankfurt am Main, Germany
| | - D Gütle
- Institute for Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| | - E Rutkowski
- Institute for Molecular Medicine, Goethe-University Frankfurt am Main, Frankfurt am Main, Germany
| | - A Weigert
- Institute for Biochemistry I, Goethe-University Frankfurt am Main, Frankfurt am Main, Germany
| | - L Kveberg
- Department of Immunology, Oslo University Hospital, Rikshospitalet and University of Oslo, Oslo, Norway
| | - J T Vaage
- Department of Immunology, Oslo University Hospital, Rikshospitalet and University of Oslo, Oslo, Norway
| | - M W Hornef
- Institute for Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| | - A Steinle
- Institute for Molecular Medicine, Goethe-University Frankfurt am Main, Frankfurt am Main, Germany
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49
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Allan DSJ, Kirkham CL, Aguilar OA, Qu LC, Chen P, Fine JH, Serra P, Awong G, Gommerman JL, Zúñiga-Pflücker JC, Carlyle JR. An in vitro model of innate lymphoid cell function and differentiation. Mucosal Immunol 2015; 8:340-51. [PMID: 25138665 DOI: 10.1038/mi.2014.71] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Accepted: 06/28/2014] [Indexed: 02/04/2023]
Abstract
Innate lymphoid cells (ILC) are RAG-independent lymphocytes with important roles in innate immunity, and include group-1 (natural killer (NK) cell, ILC1), group-2 (ILC2), and group-3 (lymphoid tissue inducer (LTi), NCR(+) ILC3) subsets. Group-3 ILC express Rorγt, produce interleukin (IL)-22, and are critically important in the normal function of mucosal tissues. Here, we describe a novel model cell line for the study of ILC function and differentiation. The parental MNK cell line, derived from NKR-P1B(+) fetal thymocytes, shows a capacity to differentiate in γc cytokines. One IL-7-responsive subline, designated MNK-3, expresses Rorγt and produces high levels of IL-22 in response to IL-23 and IL-1β stimulation. MNK-3 cells display surface markers and transcript expression characteristic of group-3 ILC, including IL-7Rα (CD127), c-kit (CD117), CCR6, Thy1 (CD90), RANK, RANKL, and lymphotoxin (LTα1β2). Using an in vitro assay of LTi cell activity, MNK-3 cells induce ICAM-1 and VCAM-1 expression on stromal cells in a manner dependent upon LTα1β2 expression. A second IL-2-responsive subline, MNK-1, expresses several NK cell receptors, perforin and granzymes, and shows some cytotoxic activity. Thus, MNK-1 cells serve as a model of ILC1/NK development and differentiation, whereas MNK-3 cells provide an attractive in vitro system to study the function of ILC3/LTi cells.
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Affiliation(s)
- D S J Allan
- 1] Department of Immunology, University of Toronto, Toronto, Ontario, Canada [2] Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - C L Kirkham
- 1] Department of Immunology, University of Toronto, Toronto, Ontario, Canada [2] Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - O A Aguilar
- 1] Department of Immunology, University of Toronto, Toronto, Ontario, Canada [2] Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - L C Qu
- 1] Department of Immunology, University of Toronto, Toronto, Ontario, Canada [2] Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - P Chen
- 1] Department of Immunology, University of Toronto, Toronto, Ontario, Canada [2] Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - J H Fine
- 1] Department of Immunology, University of Toronto, Toronto, Ontario, Canada [2] Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - P Serra
- 1] Department of Immunology, University of Toronto, Toronto, Ontario, Canada [2] Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - G Awong
- 1] Department of Immunology, University of Toronto, Toronto, Ontario, Canada [2] Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - J L Gommerman
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - J C Zúñiga-Pflücker
- 1] Department of Immunology, University of Toronto, Toronto, Ontario, Canada [2] Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - J R Carlyle
- 1] Department of Immunology, University of Toronto, Toronto, Ontario, Canada [2] Sunnybrook Research Institute, Toronto, Ontario, Canada
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50
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Rozbeský D, Ivanova L, Hernychová L, Grobárová V, Novák P, Černý J. Nkrp1 family, from lectins to protein interacting molecules. Molecules 2015; 20:3463-78. [PMID: 25690298 PMCID: PMC6272133 DOI: 10.3390/molecules20023463] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Revised: 02/06/2015] [Accepted: 02/11/2015] [Indexed: 11/25/2022] Open
Abstract
The C-type lectin-like receptors include the Nkrp1 protein family that regulates the activity of natural killer (NK) cells. Rat Nkrp1a was reported to bind monosaccharide moieties in a Ca2+-dependent manner in preference order of GalNac > GlcNAc >> Fuc >> Gal > Man. These findings established for rat Nkrp1a have been extrapolated to all additional Nkrp1 receptors and have been supported by numerous studies over the past two decades. However, since 1996 there has been controversy and another article showed lack of interactions with saccharides in 1999. Nevertheless, several high affinity saccharide ligands were synthesized in order to utilize their potential in antitumor therapy. Subsequently, protein ligands were introduced as specific binders for Nkrp1 proteins and three dimensional models of receptor/protein ligand interaction were derived from crystallographic data. Finally, for at least some members of the NK cell C-type lectin-like proteins, the “sweet story” was impaired by two reports in recent years. It has been shown that the rat Nkrp1a and CD69 do not bind saccharide ligands such as GlcNAc, GalNAc, chitotetraose and saccharide derivatives (GlcNAc-PAMAM) do not directly and specifically influence cytotoxic activity of NK cells as it was previously described.
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MESH Headings
- Animals
- Antigens, CD/chemistry
- Antigens, CD/immunology
- Antigens, CD/metabolism
- Antigens, Differentiation, T-Lymphocyte/chemistry
- Antigens, Differentiation, T-Lymphocyte/immunology
- Antigens, Differentiation, T-Lymphocyte/metabolism
- Humans
- Killer Cells, Natural/chemistry
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Lectins, C-Type/chemistry
- Lectins, C-Type/immunology
- Lectins, C-Type/metabolism
- Male
- NK Cell Lectin-Like Receptor Subfamily B/chemistry
- NK Cell Lectin-Like Receptor Subfamily B/immunology
- NK Cell Lectin-Like Receptor Subfamily B/metabolism
- Oligosaccharides/chemistry
- Oligosaccharides/immunology
- Oligosaccharides/metabolism
- Protein Structure, Tertiary
- Rats
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Affiliation(s)
- Daniel Rozbeský
- Institute of Microbiology, v.v.i., Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague 414220, Czech Republic.
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, Prague 212843, Czech Republic.
| | - Ljubina Ivanova
- Institute of Microbiology, v.v.i., Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague 414220, Czech Republic.
| | - Lucie Hernychová
- Institute of Microbiology, v.v.i., Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague 414220, Czech Republic.
- Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, Prague 212843, Czech Republic.
| | - Valéria Grobárová
- Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, Prague 212843, Czech Republic.
| | - Petr Novák
- Institute of Microbiology, v.v.i., Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague 414220, Czech Republic.
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, Prague 212843, Czech Republic.
| | - Jan Černý
- Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, Prague 212843, Czech Republic.
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