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Stewart EL, Counoupas C, Steain M, Ashley C, Alca S, Hartley-Tassell L, von Itzstein M, Britton WJ, Petrovsky N, Triccas JA. Dendritic cell-specific intercellular adhesion molecule-3-grabbing nonintegrin (DC-SIGN) is a cellular receptor for delta inulin adjuvant. Immunol Cell Biol 2024; 102:593-604. [PMID: 38757764 PMCID: PMC11296934 DOI: 10.1111/imcb.12774] [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: 12/20/2023] [Revised: 04/21/2024] [Accepted: 04/29/2024] [Indexed: 05/18/2024]
Abstract
Delta inulin, or Advax, is a polysaccharide vaccine adjuvant that significantly enhances vaccine-mediated immune responses against multiple pathogens and was recently licensed for use in the coronavirus disease 2019 (COVID-19) vaccine SpikoGen. Although Advax has proven effective as an immune adjuvant, its specific binding targets have not been characterized. In this report, we identify a cellular receptor for Advax recognition. In vitro uptake of Advax particles by macrophage cell lines was substantially greater than that of latex beads of comparable size, suggesting an active uptake mechanism by phagocytic cells. Using a lectin array, Advax particles were recognized by lectins specific for various carbohydrate structures including mannosyl, N-acetylgalactosamine and galactose moieties. Expression in nonphagocytic cells of dendritic cell-specific intercellular adhesion molecule-3-grabbing nonintegrin (DC-SIGN), a C-type lectin receptor, resulted in enhanced uptake of fluorescent Advax particles compared with mock-transfected cells. Advax uptake was reduced with the addition of ethylenediaminetetraacetic acid and mannan to cells, which are known inhibitors of DC-SIGN function. Finally, a specific blockade of DC-SIGN using a neutralizing antibody abrogated Advax uptake in DC-SIGN-expressing cells. Together, these results identify DC-SIGN as a putative receptor for Advax. Given the known immunomodulatory role of DC-SIGN, the findings described here have implications for the use of Advax adjuvants in humans and inform future mechanistic studies.
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Affiliation(s)
- Erica L Stewart
- Sydney Infectious Diseases Institute (Sydney ID), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia
- Centre for Infection and Immunity, Centenary Institute, The University of Sydney, Camperdown NSW 2006, Australia
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown NSW 2006, Australia
| | - Claudio Counoupas
- Sydney Infectious Diseases Institute (Sydney ID), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia
- Centre for Infection and Immunity, Centenary Institute, The University of Sydney, Camperdown NSW 2006, Australia
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown NSW 2006, Australia
| | - Megan Steain
- Sydney Infectious Diseases Institute (Sydney ID), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown NSW 2006, Australia
| | - Caroline Ashley
- Sydney Infectious Diseases Institute (Sydney ID), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown NSW 2006, Australia
| | - Sibel Alca
- Sydney Infectious Diseases Institute (Sydney ID), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown NSW 2006, Australia
| | | | - Mark von Itzstein
- Institute for Glycomics, Griffith University, Southport, QLD 4222, Australia
| | - Warwick J Britton
- Centre for Infection and Immunity, Centenary Institute, The University of Sydney, Camperdown NSW 2006, Australia
| | | | - James A Triccas
- Sydney Infectious Diseases Institute (Sydney ID), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia
- Centre for Infection and Immunity, Centenary Institute, The University of Sydney, Camperdown NSW 2006, Australia
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown NSW 2006, Australia
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2
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Kellogg CM, Pham K, Machalinski AH, Porter HL, Blankenship HE, Tooley KB, Stout MB, Rice HC, Sharpe AL, Beckstead MJ, Chucair-Elliott AJ, Ocañas SR, Freeman WM. Microglial MHC-I induction with aging and Alzheimer's is conserved in mouse models and humans. GeroScience 2023; 45:3019-3043. [PMID: 37393197 PMCID: PMC10643718 DOI: 10.1007/s11357-023-00859-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/21/2023] [Indexed: 07/03/2023] Open
Abstract
Major histocompatibility complex I (MHC-I) CNS cellular localization and function is still being determined after previously being thought to be absent from the brain. MHC-I expression has been reported to increase with brain aging in mouse, rat, and human whole tissue analyses, but the cellular localization was undetermined. Neuronal MHC-I is proposed to regulate developmental synapse elimination and tau pathology in Alzheimer's disease (AD). Here, we report that across newly generated and publicly available ribosomal profiling, cell sorting, and single-cell data, microglia are the primary source of classical and non-classical MHC-I in mice and humans. Translating ribosome affinity purification-qPCR analysis of 3-6- and 18-22-month-old (m.o.) mice revealed significant age-related microglial induction of MHC-I pathway genes B2m, H2-D1, H2-K1, H2-M3, H2-Q6, and Tap1 but not in astrocytes and neurons. Across a timecourse (12-23 m.o.), microglial MHC-I gradually increased until 21 m.o. and then accelerated. MHC-I protein was enriched in microglia and increased with aging. Microglial expression, and absence in astrocytes and neurons, of MHC-I-binding leukocyte immunoglobulin-like (Lilrs) and paired immunoglobin-like type 2 (Pilrs) receptor families could enable cell -autonomous MHC-I signaling and increased with aging in mice and humans. Increased microglial MHC-I, Lilrs, and Pilrs were observed in multiple AD mouse models and human AD data across methods and studies. MHC-I expression correlated with p16INK4A, suggesting an association with cellular senescence. Conserved induction of MHC-I, Lilrs, and Pilrs with aging and AD opens the possibility of cell-autonomous MHC-I signaling to regulate microglial reactivation with aging and neurodegeneration.
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Affiliation(s)
- Collyn M Kellogg
- Genes and Human Disease Program, Oklahoma Medical Research Foundation, 825 NE 13Th Street, Oklahoma City, OK, USA
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Kevin Pham
- Genes and Human Disease Program, Oklahoma Medical Research Foundation, 825 NE 13Th Street, Oklahoma City, OK, USA
| | - Adeline H Machalinski
- Genes and Human Disease Program, Oklahoma Medical Research Foundation, 825 NE 13Th Street, Oklahoma City, OK, USA
| | - Hunter L Porter
- Genes and Human Disease Program, Oklahoma Medical Research Foundation, 825 NE 13Th Street, Oklahoma City, OK, USA
| | - Harris E Blankenship
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Kyla B Tooley
- Genes and Human Disease Program, Oklahoma Medical Research Foundation, 825 NE 13Th Street, Oklahoma City, OK, USA
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Michael B Stout
- Aging and Metabolism Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Heather C Rice
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Amanda L Sharpe
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Michael J Beckstead
- Aging and Metabolism Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
- Oklahoma City Veterans Affairs Medical Center, Oklahoma City, OK, USA
| | - Ana J Chucair-Elliott
- Genes and Human Disease Program, Oklahoma Medical Research Foundation, 825 NE 13Th Street, Oklahoma City, OK, USA
| | - Sarah R Ocañas
- Genes and Human Disease Program, Oklahoma Medical Research Foundation, 825 NE 13Th Street, Oklahoma City, OK, USA
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Willard M Freeman
- Genes and Human Disease Program, Oklahoma Medical Research Foundation, 825 NE 13Th Street, Oklahoma City, OK, USA.
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
- Oklahoma City Veterans Affairs Medical Center, Oklahoma City, OK, USA.
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3
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Kellogg CM, Pham K, Machalinski AH, Porter HL, Blankenship HE, Tooley K, Stout MB, Rice HC, Sharpe AL, Beckstead MJ, Chucair-Elliott AJ, Ocañas SR, Freeman WM. Microglial MHC-I induction with aging and Alzheimer's is conserved in mouse models and humans. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.07.531435. [PMID: 36945372 PMCID: PMC10028873 DOI: 10.1101/2023.03.07.531435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
Major Histocompatibility Complex I (MHC-I) CNS cellular localization and function is still being determined after previously being thought to be absent from the brain. MHC-I expression has been reported to increase with brain aging in mouse, rat, and human whole tissue analyses but the cellular localization was undetermined. Neuronal MHC-I is proposed to regulate developmental synapse elimination and tau pathology in Alzheimer's disease (AD). Here we report that across newly generated and publicly available ribosomal profiling, cell sorting, and single-cell data, microglia are the primary source of classical and non-classical MHC-I in mice and humans. Translating Ribosome Affinity Purification-qPCR analysis of 3-6 and 18-22 month old (m.o.) mice revealed significant age-related microglial induction of MHC-I pathway genes B2m , H2-D1 , H2-K1 , H2-M3 , H2-Q6 , and Tap1 but not in astrocytes and neurons. Across a timecourse (12-23 m.o.), microglial MHC-I gradually increased until 21 m.o. and then accelerated. MHC-I protein was enriched in microglia and increased with aging. Microglial expression, and absence in astrocytes and neurons, of MHC-I binding Leukocyte Immunoglobulin-like (Lilrs) and Paired immunoglobin-like type 2 (Pilrs) receptor families could enable cell-autonomous MHC-I signaling and increased with aging in mice and humans. Increased microglial MHC-I, Lilrs, and Pilrs were observed in multiple AD mouse models and human AD data across methods and studies. MHC-I expression correlated with p16INK4A , suggesting an association with cellular senescence. Conserved induction of MHC-I, Lilrs, and Pilrs with aging and AD opens the possibility of cell-autonomous MHC-I signaling to regulate microglial reactivation with aging and neurodegeneration.
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Affiliation(s)
- Collyn M. Kellogg
- Genes & Human Disease Program, Oklahoma Medical Research Foundation, Oklahoma City, OK USA
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
| | - Kevin Pham
- Genes & Human Disease Program, Oklahoma Medical Research Foundation, Oklahoma City, OK USA
| | - Adeline H. Machalinski
- Genes & Human Disease Program, Oklahoma Medical Research Foundation, Oklahoma City, OK USA
| | - Hunter L. Porter
- Genes & Human Disease Program, Oklahoma Medical Research Foundation, Oklahoma City, OK USA
| | - Harris E. Blankenship
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Kyla Tooley
- Genes & Human Disease Program, Oklahoma Medical Research Foundation, Oklahoma City, OK USA
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Michael B. Stout
- Aging & Metabolism Program, Oklahoma Medical Research Foundation, Oklahoma City, OK USA
| | - Heather C. Rice
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
| | - Amanda L. Sharpe
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Michael J. Beckstead
- Aging & Metabolism Program, Oklahoma Medical Research Foundation, Oklahoma City, OK USA
- Oklahoma City Veterans Affairs Medical Center, Oklahoma City, OK USA
| | - Ana J. Chucair-Elliott
- Genes & Human Disease Program, Oklahoma Medical Research Foundation, Oklahoma City, OK USA
| | - Sarah R. Ocañas
- Genes & Human Disease Program, Oklahoma Medical Research Foundation, Oklahoma City, OK USA
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
| | - Willard M. Freeman
- Genes & Human Disease Program, Oklahoma Medical Research Foundation, Oklahoma City, OK USA
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
- Oklahoma City Veterans Affairs Medical Center, Oklahoma City, OK USA
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4
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Saad AA. Targeting cancer-associated glycans as a therapeutic strategy in leukemia. ALL LIFE 2022. [DOI: 10.1080/26895293.2022.2049901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Ashraf Abdullah Saad
- Unit of Pediatric Hematologic Oncology and BMT, Sultan Qaboos University Hospital, Muscat, Oman
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5
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Fischer S, Stegmann F, Gnanapragassam VS, Lepenies B. From structure to function – Ligand recognition by myeloid C-type lectin receptors. Comput Struct Biotechnol J 2022; 20:5790-5812. [DOI: 10.1016/j.csbj.2022.10.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 10/14/2022] [Accepted: 10/14/2022] [Indexed: 11/29/2022] Open
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Willment JA. Fc-conjugated C-type lectin receptors: Tools for understanding host-pathogen interactions. Mol Microbiol 2021; 117:632-660. [PMID: 34709692 DOI: 10.1111/mmi.14837] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 10/25/2021] [Indexed: 12/24/2022]
Abstract
The use of soluble fusion proteins of pattern recognition receptors (PRRs) used in the detection of exogenous and endogenous ligands has helped resolve the roles of PRRs in the innate immune response to pathogens, how they shape the adaptive immune response, and function in maintaining homeostasis. Using the immunoglobulin (Ig) crystallizable fragment (Fc) domain as a fusion partner, the PRR fusion proteins are soluble, stable, easily purified, have increased affinity due to the Fc homodimerization properties, and consequently have been used in a wide range of applications such as flow cytometry, screening of protein and glycan arrays, and immunofluorescent microscopy. This review will predominantly focus on the recognition of pathogens by the cell membrane-expressed glycan-binding proteins of the C-type lectin receptor (CLR) subgroup of PRRs. PRRs bind to conserved pathogen-associated molecular patterns (PAMPs), such as glycans, usually located within or on the outer surface of the pathogen. Significantly, many glycans structures are identical on both host and pathogen (e.g. the Lewis (Le) X glycan), allowing the use of Fc CLR fusion proteins with known endogenous and/or exogenous ligands as tools to identify pathogen structures that are able to interact with the immune system. Screens of highly purified pathogen-derived cell wall components have enabled identification of many unique PAMP structures recognized by CLRs. This review highlights studies using Fc CLR fusion proteins, with emphasis on the PAMPs found in fungi, bacteria, viruses, and parasites. The structure and unique features of the different CLR families is presented using examples from a broad range of microbes whenever possible.
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Affiliation(s)
- Janet A Willment
- Medical Research Council Centre for Medical Mycology, University of Exeter, Exeter, UK
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7
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Jacquet A. Characterization of Innate Immune Responses to House Dust Mite Allergens: Pitfalls and Limitations. FRONTIERS IN ALLERGY 2021; 2:662378. [PMID: 35386970 PMCID: PMC8974781 DOI: 10.3389/falgy.2021.662378] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 02/22/2021] [Indexed: 01/02/2023] Open
Abstract
Whereas house dust mite (HDM) allergy results from a dysregulated Th2-biased adaptive immune response, activation of innate immune signaling pathways is a critical prerequisite for the initiation of HDM sensitizations. Such innate sensing is mainly controlled by the airway epithelium and the skin. The resulting release of epithelial-derived proinflammatory cytokines and innate alarmins such as GM-CSF, IL-25, IL-33 and TSLP mediates the activation of ILC2 cells and cDCs to promote Th2-biased inflammation. Significant progress in the elucidation of HDM innate immune activation has been made in the past decade and highlighted key roles of the LPS/TLR4 axis, chitin-dependent pathways together with HDM protease allergens. However, the precise mechanisms by which HDM allergens are sensed by the innate immune system remain largely unknown. Such investigations are made difficult for several reasons. Among these are (1) the natural association of HDM allergens with immunostimulators from the mite exoskeleton as well as from environmental microorganisms/pollutants or endosymbiotic bacteria; (2) the purification of individual HDM allergens from extracts in sufficient amounts and devoid of any microbial and protein impurities; (3) the production of correctly folded recombinant HDM allergens which could display the same biological activity than their natural counterparts; (4) the accessibility to human epithelial samples with cellular heterogeneities and inter-donor variations; (5) the translation of experimental data from mouse models to humans is almost missing. The goal of the present mini-review is to emphasize some important limitations and pitfalls in the elucidation of innate immunostimulatory properties of HDM allergens.
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Affiliation(s)
- Alain Jacquet
- *Correspondence: Alain Jacquet ; orcid.org/0000-0002-0980-9741
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8
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Foster AJ, Nagata M, Lu X, Lynch AT, Omahdi Z, Ishikawa E, Yamasaki S, Timmer MSM, Stocker BL. Lipidated Brartemicin Analogues Are Potent Th1-Stimulating Vaccine Adjuvants. J Med Chem 2018; 61:1045-1060. [DOI: 10.1021/acs.jmedchem.7b01468] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Amy J. Foster
- School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
| | - Masahiro Nagata
- Department of Molecular Immunology, Research
Institute for Microbial Diseases, Osaka University, Suita 565-0871, Japan
| | - Xiuyuan Lu
- Department of Molecular Immunology, Research
Institute for Microbial Diseases, Osaka University, Suita 565-0871, Japan
- Division of Molecular
Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan
- Laboratory
of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Suita 565-0871, Japan
| | - Amy T. Lynch
- School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
| | - Zakaria Omahdi
- Department of Molecular Immunology, Research
Institute for Microbial Diseases, Osaka University, Suita 565-0871, Japan
- Division of Molecular
Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan
- Laboratory
of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Suita 565-0871, Japan
| | - Eri Ishikawa
- Department of Molecular Immunology, Research
Institute for Microbial Diseases, Osaka University, Suita 565-0871, Japan
- Laboratory
of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Suita 565-0871, Japan
| | - Sho Yamasaki
- Department of Molecular Immunology, Research
Institute for Microbial Diseases, Osaka University, Suita 565-0871, Japan
- Division of Molecular
Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan
- Laboratory
of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Suita 565-0871, Japan
- Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, Chiba 260-8673, Japan
| | - Mattie S. M. Timmer
- School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
| | - Bridget L. Stocker
- School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
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Williams SJ. Sensing Lipids with Mincle: Structure and Function. Front Immunol 2017; 8:1662. [PMID: 29230225 PMCID: PMC5711825 DOI: 10.3389/fimmu.2017.01662] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 11/13/2017] [Indexed: 01/06/2023] Open
Abstract
Mincle is a C-type lectin receptor that has emerged as an important player in innate immunity through its capacity to recognize a wide range of lipidic species derived from damaged/altered self and foreign microorganisms. Self-ligands include sterols (e.g., cholesterol), and β-glucosylceramides, and the protein SAP130, which is released upon cell death. Foreign lipids comprise those from both microbial pathogens and commensals and include glycerol, glucose and trehalose mycolates, and glycosyl diglycerides. A large effort has focused on structural variation of these ligands to illuminate the structure–activity relationships required for the agonism of signaling though Mincle and has helped identify key differences in ligand recognition between human and rodent Mincle. These studies in turn have helped identify new Mincle ligands, further broadening our understanding of the diversity of organisms and lipidic species recognized by Mincle. Finally, progress toward the development of Mincle agonists as vaccine adjuvants providing humoral and cell-mediated immunity with reduced toxicity is discussed.
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Affiliation(s)
- Spencer J Williams
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, VIC, Australia
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