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Lee JS, Kim C. Role of CARD9 in Cell- and Organ-Specific Immune Responses in Various Infections. Int J Mol Sci 2024; 25:2598. [PMID: 38473845 DOI: 10.3390/ijms25052598] [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: 12/12/2023] [Revised: 02/20/2024] [Accepted: 02/21/2024] [Indexed: 03/14/2024] Open
Abstract
The caspase recruitment domain-containing protein 9 (CARD9) is an intracellular adaptor protein that is abundantly expressed in cells of the myeloid lineage, such as neutrophils, macrophages, and dendritic cells. CARD9 plays a critical role in host immunity against infections caused by fungi, bacteria, and viruses. A CARD9 deficiency impairs the production of inflammatory cytokines and chemokines as well as migration and infiltration, thereby increasing susceptibility to infections. However, CARD9 signaling varies depending on the pathogen causing the infection. Furthermore, different studies have reported altered CARD9-mediated signaling even with the same pathogen. Therefore, this review focuses on and elucidates the current literature on varied CARD9 signaling in response to various infectious stimuli in humans and experimental mice models.
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Affiliation(s)
- Ji Seok Lee
- Laboratory of Leukocyte Signaling Research, Department of Pharmacology, Inha University School of Medicine, Incheon 22212, Republic of Korea
- BK21, Program in Biomedical Science & Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Chaekyun Kim
- Laboratory of Leukocyte Signaling Research, Department of Pharmacology, Inha University School of Medicine, Incheon 22212, Republic of Korea
- BK21, Program in Biomedical Science & Engineering, Inha University, Incheon 22212, Republic of Korea
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2
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Uckeley ZM, Duboeuf M, Gu Y, Erny A, Mazelier M, Lüchtenborg C, Winter SL, Schad P, Mathieu C, Koch J, Boulant S, Chlanda P, Maisse C, Brügger B, Lozach PY. Glucosylceramide in bunyavirus particles is essential for virus binding to host cells. Cell Mol Life Sci 2024; 81:71. [PMID: 38300320 PMCID: PMC10834583 DOI: 10.1007/s00018-023-05103-0] [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: 09/23/2023] [Revised: 12/08/2023] [Accepted: 12/21/2023] [Indexed: 02/02/2024]
Abstract
Hexosylceramides (HexCer) are implicated in the infection process of various pathogens. However, the molecular and cellular functions of HexCer in infectious cycles are poorly understood. Investigating the enveloped virus Uukuniemi (UUKV), a bunyavirus of the Phenuiviridae family, we performed a lipidomic analysis with mass spectrometry and determined the lipidome of both infected cells and derived virions. We found that UUKV alters the processing of HexCer to glycosphingolipids (GSL) in infected cells. The infection resulted in the overexpression of glucosylceramide (GlcCer) synthase (UGCG) and the specific accumulation of GlcCer and its subsequent incorporation into viral progeny. UUKV and several pathogenic bunyaviruses relied on GlcCer in the viral envelope for binding to various host cell types. Overall, our results indicate that GlcCer is a structural determinant of virions crucial for bunyavirus infectivity. This study also highlights the importance of glycolipids on virions in facilitating interactions with host cell receptors and infectious entry of enveloped viruses.
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Affiliation(s)
- Zina M Uckeley
- Center for Integrative Infectious Diseases Research (CIID), University Hospital Heidelberg, 69120, Heidelberg, Germany
- Cluster of Excellence, CellNetworks, 69120, Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, 69120, Heidelberg, Germany
- Department for Molecular Genetics and Microbiology, University of Florida, Gainesville, USA
| | - Maëva Duboeuf
- Université Claude Bernard Lyon 1, INRAE, EPHE, IVPC UMR754, Team iWays, 69007, Lyon, France
| | - Yu Gu
- Université Claude Bernard Lyon 1, INRAE, EPHE, IVPC UMR754, Team iWays, 69007, Lyon, France
| | - Alexandra Erny
- Université Claude Bernard Lyon 1, INRAE, EPHE, IVPC UMR754, Team iWays, 69007, Lyon, France
| | - Magalie Mazelier
- Center for Integrative Infectious Diseases Research (CIID), University Hospital Heidelberg, 69120, Heidelberg, Germany
- Cluster of Excellence, CellNetworks, 69120, Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, 69120, Heidelberg, Germany
| | | | - Sophie L Winter
- Center for Integrative Infectious Diseases Research (CIID), University Hospital Heidelberg, 69120, Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, 69120, Heidelberg, Germany
- Schaller Research Groups, Department of Infectious Diseases, Virology, Heidelberg University Hospital, Heidelberg, Germany
| | - Paulina Schad
- Center for Integrative Infectious Diseases Research (CIID), University Hospital Heidelberg, 69120, Heidelberg, Germany
- Cluster of Excellence, CellNetworks, 69120, Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, 69120, Heidelberg, Germany
| | - Cyrille Mathieu
- CIRI (Centre International de Recherche en Infectiologie), Team Neuro-Invasion, TROpism and VIRal Encephalitis, INSERM U1111, CNRS UMR5308, Université Claude Bernard Lyon 1, Ecole Normale Supérieure de Lyon, 69007, Lyon, France
| | - Jana Koch
- Center for Integrative Infectious Diseases Research (CIID), University Hospital Heidelberg, 69120, Heidelberg, Germany
- Cluster of Excellence, CellNetworks, 69120, Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, 69120, Heidelberg, Germany
- Université Claude Bernard Lyon 1, INRAE, EPHE, IVPC UMR754, Team iWays, 69007, Lyon, France
| | - Steeve Boulant
- Department for Molecular Genetics and Microbiology, University of Florida, Gainesville, USA
| | - Petr Chlanda
- Center for Integrative Infectious Diseases Research (CIID), University Hospital Heidelberg, 69120, Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, 69120, Heidelberg, Germany
- Schaller Research Groups, Department of Infectious Diseases, Virology, Heidelberg University Hospital, Heidelberg, Germany
| | - Carine Maisse
- Université Claude Bernard Lyon 1, INRAE, EPHE, IVPC UMR754, Team iWays, 69007, Lyon, France
| | - Britta Brügger
- Heidelberg University Biochemistry Center (BZH), Heidelberg, Germany
| | - Pierre-Yves Lozach
- Center for Integrative Infectious Diseases Research (CIID), University Hospital Heidelberg, 69120, Heidelberg, Germany.
- Cluster of Excellence, CellNetworks, 69120, Heidelberg, Germany.
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, 69120, Heidelberg, Germany.
- Université Claude Bernard Lyon 1, INRAE, EPHE, IVPC UMR754, Team iWays, 69007, Lyon, France.
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3
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Corneillie L, Lemmens I, Weening K, De Meyer A, Van Houtte F, Tavernier J, Meuleman P. Virus-Host Protein Interaction Network of the Hepatitis E Virus ORF2-4 by Mammalian Two-Hybrid Assays. Viruses 2023; 15:2412. [PMID: 38140653 PMCID: PMC10748205 DOI: 10.3390/v15122412] [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: 09/14/2023] [Revised: 12/01/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023] Open
Abstract
Throughout their life cycle, viruses interact with cellular host factors, thereby influencing propagation, host range, cell tropism and pathogenesis. The hepatitis E virus (HEV) is an underestimated RNA virus in which knowledge of the virus-host interaction network to date is limited. Here, two related high-throughput mammalian two-hybrid approaches (MAPPIT and KISS) were used to screen for HEV-interacting host proteins. Promising hits were examined on protein function, involved pathway(s), and their relation to other viruses. We identified 37 ORF2 hits, 187 for ORF3 and 91 for ORF4. Several hits had functions in the life cycle of distinct viruses. We focused on SHARPIN and RNF5 as candidate hits for ORF3, as they are involved in the RLR-MAVS pathway and interferon (IFN) induction during viral infections. Knocking out (KO) SHARPIN and RNF5 resulted in a different IFN response upon ORF3 transfection, compared to wild-type cells. Moreover, infection was increased in SHARPIN KO cells and decreased in RNF5 KO cells. In conclusion, MAPPIT and KISS are valuable tools to study virus-host interactions, providing insights into the poorly understood HEV life cycle. We further provide evidence for two identified hits as new host factors in the HEV life cycle.
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Affiliation(s)
- Laura Corneillie
- Laboratory of Liver Infectious Diseases, Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
| | - Irma Lemmens
- VIB-UGent Center for Medical Biotechnology, Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
| | - Karin Weening
- Laboratory of Liver Infectious Diseases, Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
| | - Amse De Meyer
- Laboratory of Liver Infectious Diseases, Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
| | - Freya Van Houtte
- Laboratory of Liver Infectious Diseases, Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
| | - Jan Tavernier
- VIB-UGent Center for Medical Biotechnology, Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
| | - Philip Meuleman
- Laboratory of Liver Infectious Diseases, Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
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4
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Prince BC, Chan K, Rückert C. Elucidating the role of dsRNA sensing and Toll6 in antiviral responses of Culex quinquefasciatus cells. Front Cell Infect Microbiol 2023; 13:1251204. [PMID: 37712057 PMCID: PMC10499357 DOI: 10.3389/fcimb.2023.1251204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 08/14/2023] [Indexed: 09/16/2023] Open
Abstract
The first step of any immune response is the recognition of foreign molecular structures inside the host organism. An important molecule that is generally foreign to eukaryotic cells is long double-stranded RNA (dsRNA), which can be generated during virus replication. The mechanisms of sensing viral dsRNA are well-studied in mammalian systems but are only poorly understood in insects, including disease vectors such as Culex quinquefasciatus mosquitoes. These mosquitoes are vectors for important arboviruses, such as West Nile virus, and Culex species mosquitoes are distributed across the globe in many temperate and tropical regions. The major antiviral response triggered by dsRNA in mosquitoes is RNA interference - a sequence-specific response which targets complementary viral RNA for degradation. However, here, we aimed to identify whether sequence-independent dsRNA sensing, mimicked by poly(I:C), can elicit an antiviral response. We observed a significant reduction in replication of La Crosse virus (LACV) in Cx. quinquefasciatus mosquito cells following poly(I:C) priming. We identified a number of antimicrobial peptides and Toll receptors that were upregulated at the transcript level by poly(I:C) stimulation. Notably, Toll6 was upregulated and we determined that a knockdown of Toll6 expression resulted also in increased LACV replication. Future efforts require genetic tools to validate whether the observed Toll6 antiviral activity is indeed linked to dsRNA sensing. However, large-scale functional genomic and proteomic approaches are also required to determine which downstream responses are part of the poly(I:C) elicited antiviral response.
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Affiliation(s)
| | | | - Claudia Rückert
- Department of Biochemistry and Molecular Biology, College of Agriculture, Biotechnology & Natural Resources, University of Nevada, Reno, NV, United States
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5
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Basu R, Ganesan S, Winkler CW, Anzick SL, Martens C, Peterson KE, Fraser IDC. Identification of age-specific gene regulators of La Crosse virus neuroinvasion and pathogenesis. Nat Commun 2023; 14:2836. [PMID: 37202395 DOI: 10.1038/s41467-023-37833-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 04/03/2023] [Indexed: 05/20/2023] Open
Abstract
One of the key events in viral encephalitis is the ability of virus to enter the central nervous system (CNS). Several encephalitic viruses, including La Crosse Virus (LACV), primarily induce encephalitis in children, but not adults. This phenomenon is also observed in LACV mouse models, where the virus gains access to the CNS of weanling animals through vascular leakage of brain microvessels, likely through brain capillary endothelial cells (BCECs). To examine age and region-specific regulatory factors of vascular leakage, we used genome-wide transcriptomics and targeted siRNA screening to identify genes whose suppression affected viral pathogenesis in BCECs. Further analysis of two of these gene products, Connexin43 (Cx43/Gja1) and EphrinA2 (Efna2), showed a substantial effect on LACV pathogenesis. Induction of Cx43 by 4-phenylbutyric acid (4-PBA) inhibited neurological disease in weanling mice, while Efna2 deficiency increased disease in adult mice. Thus, we show that Efna2 and Cx43 expressed by BCECs are key mediators of LACV-induced neuroinvasion and neurological disease.
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Affiliation(s)
- Rahul Basu
- Neuroimmunology Section, Laboratory of Persistent Viral Disease, Rocky Mountain Laboratories, NIAID, NIH, 903 S. 4th Street, MT, 59840, Hamilton, USA
- Signaling Systems Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 4 Memorial Drive, Bethesda, MD, 20892, USA
| | - Sundar Ganesan
- Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 4 Memorial Drive, Bethesda, MD, 20892, USA
| | - Clayton W Winkler
- Neuroimmunology Section, Laboratory of Persistent Viral Disease, Rocky Mountain Laboratories, NIAID, NIH, 903 S. 4th Street, MT, 59840, Hamilton, USA
| | - Sarah L Anzick
- Genomics Research Section, Research Technologies Branch, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 903 S. 4th Street, MT 59840, Hamilton, MT, USA
| | - Craig Martens
- Genomics Research Section, Research Technologies Branch, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 903 S. 4th Street, MT 59840, Hamilton, MT, USA
| | - Karin E Peterson
- Neuroimmunology Section, Laboratory of Persistent Viral Disease, Rocky Mountain Laboratories, NIAID, NIH, 903 S. 4th Street, MT, 59840, Hamilton, USA.
| | - Iain D C Fraser
- Signaling Systems Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 4 Memorial Drive, Bethesda, MD, 20892, USA.
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6
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Hellert J, Aebischer A, Haouz A, Guardado-Calvo P, Reiche S, Beer M, Rey FA. Structure, function, and evolution of the Orthobunyavirus membrane fusion glycoprotein. Cell Rep 2023; 42:112142. [PMID: 36827185 DOI: 10.1016/j.celrep.2023.112142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 12/29/2022] [Accepted: 02/07/2023] [Indexed: 02/24/2023] Open
Abstract
La Crosse virus, responsible for pediatric encephalitis in the United States, and Schmallenberg virus, a highly teratogenic veterinary virus in Europe, belong to the large Orthobunyavirus genus of zoonotic arthropod-borne pathogens distributed worldwide. Viruses in this under-studied genus cause CNS infections or fever with debilitating arthralgia/myalgia syndromes, with no effective treatment. The main surface antigen, glycoprotein Gc (∼1,000 residues), has a variable N-terminal half (GcS) targeted by the patients' antibody response and a conserved C-terminal moiety (GcF) responsible for membrane fusion during cell entry. Here, we report the X-ray structure of post-fusion La Crosse and Schmallenberg virus GcF, revealing the molecular determinants for hairpin formation and trimerization required to drive membrane fusion. We further experimentally confirm the role of residues in the fusion loops and in a vestigial endoplasmic reticulum (ER) translocation sequence at the GcS-GcF junction. The resulting knowledge provides essential molecular underpinnings for future development of potential therapeutic treatments and vaccines.
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Affiliation(s)
- Jan Hellert
- Structural Virology Unit, Institut Pasteur - Université Paris-Cité, CNRS UMR 3569, 25-28 rue du Dr. Roux, 75015 Paris, France; Centre for Structural Systems Biology (CSSB), Leibniz-Institut für Virologie (LIV), Notkestraße 85, 22607 Hamburg, Germany
| | - Andrea Aebischer
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Südufer 10, 17493 Greifswald, Germany; Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, Südufer 10, 17493 Greifswald, Germany
| | - Ahmed Haouz
- Crystallography Platform C2RT, Institut Pasteur, CNRS UMR 3528, 25-28 rue du Dr. Roux, 75015 Paris, France
| | - Pablo Guardado-Calvo
- Structural Virology Unit, Institut Pasteur - Université Paris-Cité, CNRS UMR 3569, 25-28 rue du Dr. Roux, 75015 Paris, France
| | - Sven Reiche
- Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, Südufer 10, 17493 Greifswald, Germany
| | - Martin Beer
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Südufer 10, 17493 Greifswald, Germany.
| | - Félix A Rey
- Structural Virology Unit, Institut Pasteur - Université Paris-Cité, CNRS UMR 3569, 25-28 rue du Dr. Roux, 75015 Paris, France.
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7
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Hu A, Hu Z, Zou H, Zhang J, Zhang D, Wang H, Zhong J, Chen B. CARD9 in host immunity to fungal, bacterial, viral, and parasitic infections: An update. Front Microbiol 2022; 13:1021837. [PMID: 36439825 PMCID: PMC9682022 DOI: 10.3389/fmicb.2022.1021837] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 10/07/2022] [Indexed: 10/14/2023] Open
Abstract
Microbial infection, caused by fungi, bacteria, viruses, and parasites, significantly contributes to the global death burden and health costs. The innate and adaptive immune systems orchestrate a multifaceted signaling response to invading pathogens as the human antimicrobial system. In this process, caspase recruitment domain-containing protein 9 (CARD9) emerges as a critical intermediary adaptor molecule to participate in regulating a series of antimicrobial immune reactions. Previous publications have confirmed that CARD9 plays a crucial role in fungal, bacterial, viral, and parasitic infections. In this study, we aim to provide an update on the recent clinical and basic studies where the mechanism and function of CARD9 have been further studied and understood. In addition, we summarize the latest treatment and prevention strategies based on CARD9 and discuss the current perspectives and future direction of CARD9.
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Affiliation(s)
- Ang Hu
- Department of General Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou, China
| | - Zeming Hu
- School of Medicine, Ningbo University, Ningbo, China
| | - Haohong Zou
- Department of General Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou, China
| | - Jiankang Zhang
- Department of General Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Dongliang Zhang
- Department of General Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Hao Wang
- Department of General Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Jianing Zhong
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou, China
| | - Bin Chen
- Department of General Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
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Li T, Liu T, Zhao Z, Pan Y, Xu X, Zhang Y, Zhan S, Zhou S, Zhu W, Guo H, Yang R. Antifungal immunity mediated by C-type lectin receptors may be a novel target in immunotherapy for urothelial bladder cancer. Front Immunol 2022; 13:911325. [PMID: 36131933 PMCID: PMC9483128 DOI: 10.3389/fimmu.2022.911325] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 07/18/2022] [Indexed: 11/29/2022] Open
Abstract
Immunotherapies, such as immune-checkpoint blockade and adoptive T-cell therapy, offer novel treatment options with good efficacy for patients with urothelial bladder cancer. However, heterogeneity and therapeutic resistance have limited the use of immunotherapy. Further research into immune-regulatory mechanisms in bladder cancer is urgently required. Emerging evidence demonstrates that the commensal microbiota and its interactions with host immunity play pivotal roles in a variety of physiological and pathological processes, including in cancer. The gut microbiota has been identified as a potentially effective target of treatment that can be synergized with immunotherapy. The urothelial tract is also a key site for multiple microbes, although the immune-regulatory role of the urinary microbiome in the process of carcinogenesis of bladder cancer remains to be elucidated. We performed a comprehensive analysis of the expression and biological functions of C-type lectin receptors (CLRs), which have been recognized as innate pathogen-associated receptors for fungal microbiota, in bladder cancer. In line with previous research on fungal colonization of the urothelial tract, we found that CLRs, including Dectin-1, Dectin-2, Dectin-3, and macrophage-inducible Ca2+-dependent lectin receptor (Mincle), had a significant association with immune infiltration in bladder cancer. Multiple innate and adaptive pathways are positively correlated with the upregulation of CLRs. In addition, we found a significant correlation between the expression of CLRs and a range of immune-checkpoint proteins in bladder cancer. Based on previous studies and our findings, we hypothesize that the urinary mycobiome plays a key role in the pathogenesis of bladder cancer and call for more research on CLR-mediated anti-fungal immunity against bladder cancer as a novel target for immunotherapy in urothelial bladder cancer.
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Affiliation(s)
- Tianhang Li
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Tianyao Liu
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Zihan Zhao
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Yuchen Pan
- State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical School, Nanjing University, Nanjing, China
| | - Xinyan Xu
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Yulin Zhang
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Shoubin Zhan
- Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Shengkai Zhou
- Jiangsu Engineering Research Center for microRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
| | - Wenjie Zhu
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
| | - Hongqian Guo
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
- *Correspondence: Rong Yang, ; Hongqian Guo,
| | - Rong Yang
- Department of Urology, Affiliated Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing, China
- *Correspondence: Rong Yang, ; Hongqian Guo,
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9
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A mechanism of self-lipid endocytosis mediated by the receptor Mincle. Proc Natl Acad Sci U S A 2022; 119:e2120489119. [PMID: 35867828 PMCID: PMC9335232 DOI: 10.1073/pnas.2120489119] [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: 11/18/2022] Open
Abstract
Dysregulation of lipid endocytosis, a normal physiological process of cellular lipid uptake, often underlies the pathogenesis of some widespread diseases such as atherosclerosis, obesity, and diabetes. However, the mechanisms of lipid endocytosis are incompletely understood, and only a few such mechanisms have been discovered, limiting the available therapeutic strategies and targets in these diseases. Here we found that the receptor Mincle, previously known as a pattern recognition receptor of the innate immune system, plays a significant role in endocytosis. The results have revealed a fundamental pathway of lipid endocytosis, which we call Mincle-mediated endocytosis. Cellular lipid uptake (through endocytosis) is a basic physiological process. Dysregulation of this process underlies the pathogenesis of diseases such as atherosclerosis, obesity, diabetes, and cancer. However, to date, only some mechanisms of lipid endocytosis have been discovered. Here, we show a previously unknown mechanism of lipid cargo uptake into cells mediated by the receptor Mincle. We found that the receptor Mincle, previously shown to be a pattern recognition receptor of the innate immune system, tightly binds a range of self-lipids. Moreover, we revealed the minimal molecular motif in lipids that is sufficient for Mincle recognition. Superresolution microscopy showed that Mincle forms vesicles in cytoplasm and colocalizes with added fluorescent lipids in endothelial cells but does not colocalize with either clathrin or caveolin-1, and the added lipids were predominantly incorporated in vesicles that expressed Mincle. Using a model of ganglioside GM3 uptake in brain vessel endothelial cells, we show that the knockout of Mincle led to a dramatic decrease in lipid endocytosis. Taken together, our results have revealed a fundamental lipid endocytosis pathway, which we call Mincle-mediated endocytosis (MiME), and indicate a prospective target for the treatment of disorders of lipid metabolism, which are rapidly increasing in prevalence.
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Liu X, Jiang B, Hao H, Liu Z. CARD9 Signaling, Inflammation, and Diseases. Front Immunol 2022; 13:880879. [PMID: 35432375 PMCID: PMC9005907 DOI: 10.3389/fimmu.2022.880879] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/07/2022] [Indexed: 12/15/2022] Open
Abstract
Caspase-recruitment domain 9 (CARD9) protein is expressed in many cells especially in immune cells, and is critically involved in the function of the innate and adaptive immune systems through extensive interactions between CARD9 and other signaling molecules including NF-κB and MAPK. CARD9-mediated signaling plays a central role in regulating inflammatory responses and oxidative stress through the productions of important cytokines and chemokines. Abnormalities of CARD9 and CARD9 signaling or CARD9 mutations or polymorphism are associated with a variety of pathological conditions including infections, inflammation, and autoimmune disorders. This review focuses on the function of CARD9 and CARD9-mediated signaling pathways, as well as interactions with other important signaling molecules in different cell types and the relations to specific disease conditions including inflammatory diseases, infections, tumorigenesis, and cardiovascular pathologies.
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Affiliation(s)
- Xuanyou Liu
- Center for Precision Medicine and Division of Cardiovascular Medicine, Department of Medicine, School of Medicine, University of Missouri, Columbia, MO, United States.,Department of Medical Pharmacology and Physiology, School of Medicine, University of Missouri, Columbia, MO, United States
| | - Bimei Jiang
- Department of Pathophysiology, Central South University, Changsha, China
| | - Hong Hao
- Center for Precision Medicine and Division of Cardiovascular Medicine, Department of Medicine, School of Medicine, University of Missouri, Columbia, MO, United States
| | - Zhenguo Liu
- Center for Precision Medicine and Division of Cardiovascular Medicine, Department of Medicine, School of Medicine, University of Missouri, Columbia, MO, United States
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Schön K, Lindenwald DL, Monteiro JT, Glanz J, Jung K, Becker SC, Lepenies B. Vector and Host C-Type Lectin Receptor (CLR)-Fc Fusion Proteins as a Cross-Species Comparative Approach to Screen for CLR-Rift Valley Fever Virus Interactions. Int J Mol Sci 2022; 23:ijms23063243. [PMID: 35328665 PMCID: PMC8954825 DOI: 10.3390/ijms23063243] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/11/2022] [Accepted: 03/14/2022] [Indexed: 12/25/2022] Open
Abstract
Rift Valley fever virus (RVFV) is a mosquito-borne bunyavirus endemic to Africa and the Arabian Peninsula, which causes diseases in humans and livestock. C-type lectin receptors (CLRs) represent a superfamily of pattern recognition receptors that were reported to interact with diverse viruses and contribute to antiviral immune responses but may also act as attachment factors or entry receptors in diverse species. Human DC-SIGN and L-SIGN are known to interact with RVFV and to facilitate viral host cell entry, but the roles of further host and vector CLRs are still unknown. In this study, we present a CLR–Fc fusion protein library to screen RVFV–CLR interaction in a cross-species approach and identified novel murine, ovine, and Aedes aegypti RVFV candidate receptors. Furthermore, cross-species CLR binding studies enabled observations of the differences and similarities in binding preferences of RVFV between mammalian CLR homologues, as well as more distant vector/host CLRs.
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Affiliation(s)
- Kathleen Schön
- Institute for Parasitology & Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hanover, Germany;
- Institute for Immunology & Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hanover, Germany; (D.L.L.); (J.T.M.)
| | - Dimitri L. Lindenwald
- Institute for Immunology & Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hanover, Germany; (D.L.L.); (J.T.M.)
| | - João T. Monteiro
- Institute for Immunology & Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hanover, Germany; (D.L.L.); (J.T.M.)
| | - Julien Glanz
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, 30559 Hanover, Germany; (J.G.); (K.J.)
| | - Klaus Jung
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, 30559 Hanover, Germany; (J.G.); (K.J.)
| | - Stefanie C. Becker
- Institute for Parasitology & Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hanover, Germany;
- Correspondence: (S.C.B.); (B.L.)
| | - Bernd Lepenies
- Institute for Immunology & Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hanover, Germany; (D.L.L.); (J.T.M.)
- Correspondence: (S.C.B.); (B.L.)
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12
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Windhaber S, Xin Q, Uckeley ZM, Koch J, Obr M, Garnier C, Luengo-Guyonnot C, Duboeuf M, Schur FKM, Lozach PY. The Orthobunyavirus Germiston Enters Host Cells from Late Endosomes. J Virol 2022; 96:e0214621. [PMID: 35019710 PMCID: PMC8906410 DOI: 10.1128/jvi.02146-21] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 01/03/2022] [Indexed: 01/01/2023] Open
Abstract
With more than 80 members worldwide, the Orthobunyavirus genus in the Peribunyaviridae family is a large genus of enveloped RNA viruses, many of which are emerging pathogens in humans and livestock. How orthobunyaviruses (OBVs) penetrate and infect mammalian host cells remains poorly characterized. Here, we investigated the entry mechanisms of the OBV Germiston (GERV). Viral particles were visualized by cryo-electron microscopy and appeared roughly spherical with an average diameter of 98 nm. Labeling of the virus with fluorescent dyes did not adversely affect its infectivity and allowed the monitoring of single particles in fixed and live cells. Using this approach, we found that endocytic internalization of bound viruses was asynchronous and occurred within 30 to 40 min. The virus entered Rab5a-positive (Rab5a+) early endosomes and, subsequently, late endosomal vacuoles containing Rab7a but not LAMP-1. Infectious entry did not require proteolytic cleavage, and endosomal acidification was sufficient and necessary for viral fusion. Acid-activated penetration began 15 to 25 min after initiation of virus internalization and relied on maturation of early endosomes to late endosomes. The optimal pH for viral membrane fusion was slightly below 6.0, and penetration was hampered when the potassium influx was abolished. Overall, our study provides real-time visualization of GERV entry into host cells and demonstrates the importance of late endosomal maturation in facilitating OBV penetration. IMPORTANCE Orthobunyaviruses (OBVs), which include La Crosse, Oropouche, and Schmallenberg viruses, represent a growing threat to humans and domestic animals worldwide. Ideally, preventing OBV spread requires approaches that target early stages of infection, i.e., virus entry. However, little is known about the molecular and cellular mechanisms by which OBVs enter and infect host cells. Here, we developed accurate, sensitive tools and assays to investigate the penetration process of GERV. Our data emphasize the central role of late endosomal maturation in GERV entry, providing a comprehensive overview of the early stages of an OBV infection. Our study also brings a complete toolbox of innovative methods to study each step of the OBV entry program in fixed and living cells, from virus binding and endocytosis to fusion and penetration. The information gained herein lays the foundation for the development of antiviral strategies aiming to block OBV entry.
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Affiliation(s)
- Stefan Windhaber
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
| | - Qilin Xin
- University of Lyon, INRAE, EPHE, IVPC, Lyon, France
| | - Zina M. Uckeley
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
| | - Jana Koch
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
| | - Martin Obr
- Institute of Science and Technology Austria, Klosterneuburg, Austria
| | | | | | | | | | - Pierre-Yves Lozach
- CellNetworks-Cluster of Excellence Heidelberg, Germany
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, Heidelberg, Germany
- University of Lyon, INRAE, EPHE, IVPC, Lyon, France
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13
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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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14
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Pavasutthipaisit S, Stoff M, Ebbecke T, Ciurkiewicz M, Mayer-Lambertz S, Störk T, Pavelko KD, Lepenies B, Beineke A. CARD9 Deficiency Increases Hippocampal Injury Following Acute Neurotropic Picornavirus Infection but Does Not Affect Pathogen Elimination. Int J Mol Sci 2021; 22:ijms22136982. [PMID: 34209576 PMCID: PMC8268812 DOI: 10.3390/ijms22136982] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/20/2021] [Accepted: 06/25/2021] [Indexed: 12/11/2022] Open
Abstract
Neurotropic viruses target the brain and contribute to neurologic diseases. Caspase recruitment domain containing family member 9 (CARD9) controls protective immunity in a variety of infectious disorders. To investigate the effect of CARD9 in neurotropic virus infection, CARD9−/− and corresponding C57BL/6 wild-type control mice were infected with Theiler’s murine encephalomyelitis virus (TMEV). Brain tissue was analyzed by histology, immunohistochemistry and molecular analyses, and spleens by flow cytometry. To determine the impact of CARD9 deficiency on T cell responses in vitro, antigen presentation assays were utilized. Genetic ablation of CARD9 enhanced early pro-inflammatory cytokine responses and accelerated infiltration of T and B cells in the brain, together with a transient increase in TMEV-infected cells in the hippocampus. CARD9−/− mice showed an increased loss of neuronal nuclear protein+ mature neurons and doublecortin+ neuronal precursor cells and an increase in β-amyloid precursor protein+ damaged axons in the hippocampus. No effect of CARD9 deficiency was found on the initiation of CD8+ T cell responses by flow cytometry and co-culture experiments using virus-exposed dendritic cells or microglia-enriched glial cell mixtures, respectively. The present study indicates that CARD9 is dispensable for the initiation of early antiviral responses and TMEV elimination but may contribute to the modulation of neuroinflammation, thereby reducing hippocampal injury following neurotropic virus infection.
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Affiliation(s)
- Suvarin Pavasutthipaisit
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (S.P.); (M.S.); (M.C.); (T.S.)
- Center for Systems Neuroscience, 30559 Hannover, Germany; (T.E.); (B.L.)
- Department of Pathology, Faculty of Veterinary Medicine, Mahanakorn University of Technology, Bangkok 10530, Thailand
| | - Melanie Stoff
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (S.P.); (M.S.); (M.C.); (T.S.)
| | - Tim Ebbecke
- Center for Systems Neuroscience, 30559 Hannover, Germany; (T.E.); (B.L.)
- Institute for Immunology and Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hannover, Germany;
| | - Malgorzata Ciurkiewicz
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (S.P.); (M.S.); (M.C.); (T.S.)
| | - Sabine Mayer-Lambertz
- Institute for Immunology and Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hannover, Germany;
| | - Theresa Störk
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (S.P.); (M.S.); (M.C.); (T.S.)
| | - Kevin D. Pavelko
- Department of Immunology, Mayo Clinic, Rochester, MN 55905, USA;
| | - Bernd Lepenies
- Center for Systems Neuroscience, 30559 Hannover, Germany; (T.E.); (B.L.)
- Institute for Immunology and Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hannover, Germany;
| | - Andreas Beineke
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (S.P.); (M.S.); (M.C.); (T.S.)
- Center for Systems Neuroscience, 30559 Hannover, Germany; (T.E.); (B.L.)
- Correspondence: ; Tel.: +49-51-195-38640
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15
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Orthobunyaviruses: From Virus Binding to Penetration into Mammalian Host Cells. Viruses 2021; 13:v13050872. [PMID: 34068494 PMCID: PMC8151349 DOI: 10.3390/v13050872] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 05/05/2021] [Accepted: 05/07/2021] [Indexed: 12/04/2022] Open
Abstract
With over 80 members worldwide, Orthobunyavirus is the largest genus in the Peribunyaviridae family. Orthobunyaviruses (OBVs) are arthropod-borne viruses that are structurally simple, with a trisegmented, negative-sense RNA genome and only four structural proteins. OBVs are potential agents of emerging and re-emerging diseases and overall represent a global threat to both public and veterinary health. The focus of this review is on the very first steps of OBV infection in mammalian hosts, from virus binding to penetration and release of the viral genome into the cytosol. Here, we address the most current knowledge and advances regarding OBV receptors, endocytosis, and fusion.
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16
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Durán V, Grabski E, Hozsa C, Becker J, Yasar H, Monteiro JT, Costa B, Koller N, Lueder Y, Wiegmann B, Brandes G, Kaever V, Lehr CM, Lepenies B, Tampé R, Förster R, Bošnjak B, Furch M, Graalmann T, Kalinke U. Fucosylated lipid nanocarriers loaded with antibiotics efficiently inhibit mycobacterial propagation in human myeloid cells. J Control Release 2021; 334:201-212. [PMID: 33865899 DOI: 10.1016/j.jconrel.2021.04.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 04/10/2021] [Accepted: 04/12/2021] [Indexed: 12/13/2022]
Abstract
Antibiotic treatment of tuberculosis (TB) is complex, lengthy, and can be associated with various adverse effects. As a result, patient compliance often is poor, thus further enhancing the risk of selecting multi-drug resistant bacteria. Macrophage mannose receptor (MMR)-positive alveolar macrophages (AM) constitute a niche in which Mycobacterium tuberculosis replicates and survives. Therefore, we encapsulated levofloxacin in lipid nanocarriers functionalized with fucosyl residues that interact with the MMR. Indeed, such nanocarriers preferentially targeted MMR-positive myeloid cells, and in particular, AM. Intracellularly, fucosylated lipid nanocarriers favorably delivered their payload into endosomal compartments, where mycobacteria reside. In an in vitro setting using infected human primary macrophages as well as dendritic cells, the encapsulated antibiotic cleared the pathogen more efficiently than free levofloxacin. In conclusion, our results point towards carbohydrate-functionalized nanocarriers as a promising tool for improving TB treatment by targeted delivery of antibiotics.
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Affiliation(s)
- Verónica Durán
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, Hannover, Germany
| | - Elena Grabski
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, Hannover, Germany
| | | | - Jennifer Becker
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, Hannover, Germany
| | - Hanzey Yasar
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Center for Infection Research (HZI), Department of Drug Delivery (DDEL), Saarbrücken, Germany
| | - João T Monteiro
- Institute for Immunology & Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Hannover, Germany
| | - Bibiana Costa
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, Hannover, Germany
| | - Nicole Koller
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Frankfurt, Germany
| | - Yvonne Lueder
- Institute of Immunology, Hannover Medical School, Hannover, Germany
| | - Bettina Wiegmann
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany.; Lower Saxony Center for Biomedical Engineering, Implant Research and Development, Hannover, Medical School, Germany; German Centre of Lung Research, 30625, Hannover, Germany
| | - Gudrun Brandes
- Institute of Neuroanatomy and Cell Biology, Hannover Medical School, Hannover, Germany
| | - Volkhard Kaever
- Institute of Pharmacology, Hannover Medical School, Hannover, Germany
| | - Claus-Michael Lehr
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Center for Infection Research (HZI), Department of Drug Delivery (DDEL), Saarbrücken, Germany
| | - Bernd Lepenies
- Institute for Immunology & Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Hannover, Germany
| | - Robert Tampé
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Frankfurt, Germany
| | - Reinhold Förster
- Institute of Immunology, Hannover Medical School, Hannover, Germany.; Cluster of Excellence - Resolving Infection Susceptibility (RESIST), Hannover Medical School, Hannover, Germany
| | - Berislav Bošnjak
- Institute of Immunology, Hannover Medical School, Hannover, Germany..
| | | | - Theresa Graalmann
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, Hannover, Germany; Clinic of Immunology and Rheumatology, Hannover Medical School, Hannover, Germany..
| | - Ulrich Kalinke
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, Hannover, Germany; Cluster of Excellence - Resolving Infection Susceptibility (RESIST), Hannover Medical School, Hannover, Germany..
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17
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Expanding the Known Repertoire of C-Type Lectin Receptors Binding to Toxoplasma gondii Oocysts Using a Modified High-Resolution Immunofluorescence Assay. mSphere 2021; 6:6/2/e01341-20. [PMID: 33789945 PMCID: PMC8546727 DOI: 10.1128/msphere.01341-20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The environmental stage of the apicomplexan Toxoplasma gondii oocyst is vital to its life cycle but largely understudied. Because oocysts are excreted only by infected felids, their availability for research is limited. We report the adaptation of an agarose-based method to immobilize minute amounts of oocysts to perform immunofluorescence assays. Agarose embedding allows high-resolution confocal microscopy imaging of antibodies binding to the oocyst surface as well as unprecedented imaging of intracellular sporocyst structures with Maclura pomifera agglutinin after on-slide permeabilization of the immobilized oocysts. To identify new possible molecules binding to the oocyst surface, we used this method to screen a library of C-type lectin receptor (CLR)-human IgG constant region fusion proteins from the group of related CLRs called the Dectin-1 cluster against oocysts. In addition to CLEC7A that was previously reported to decorate T. gondii oocysts, we present experimental evidence for specific binding of three additional CLRs to the surface of this stage. We discuss how these CLRs, known to be expressed on neutrophils, dendritic cells, or macrophages, could be involved in the early immune response by the host, such as oocyst antigen uptake in the intestine. In conclusion, we present a modified immunofluorescence assay technique that allows material-saving immunofluorescence microscopy with T. gondii oocysts in a higher resolution than previously published, which allowed us to describe three additional CLRs binding specifically to the oocyst surface. IMPORTANCE Knowledge of oocyst biology of Toxoplasma gondii is limited, not the least due to its limited availability. We describe a method that permits us to process minute amounts of oocysts for immunofluorescence microscopy without compromising their structural properties. This method allowed us to visualize internal structures of sporocysts by confocal microscopy in unprecedented quality. Moreover, the method can be used as a low- to medium-throughput method to screen for molecules interacting with oocysts, such as antibodies, or compounds causing structural damage to oocysts (i.e., disinfectants). Using this method, we screened a small library of C-type lectin receptors (CLRs) present on certain immune cells and found three CLRs able to decorate the oocyst wall of T. gondii and which were not known before to bind to oocysts. These tools will allow further study into oocyst wall composition and could also provoke experiments regarding immunological recognition of oocysts.
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18
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Toxocara canis and Toxocara cati Somatic and Excretory-Secretory Antigens Are Recognised by C-Type Lectin Receptors. Pathogens 2021; 10:pathogens10030321. [PMID: 33803269 PMCID: PMC8001263 DOI: 10.3390/pathogens10030321] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/01/2021] [Accepted: 03/02/2021] [Indexed: 12/28/2022] Open
Abstract
Toxocara canis and Toxocara cati, the worldwide occurring intestinal roundworms of canids and felids, represent an important public health threat due to various disease manifestations in humans. Host recognition of pathogens is mediated by pattern recognition receptors (PRRs). Myeloid C-type lectin receptors (CLRs) are PRRs and recognise carbohydrate structures of various pathogens. As Toxocara excretory-secretory products (TES) are predominantly composed of glycoconjugates, they represent suitable targets for CLRs. However, the range of host-derived CLRs recognising Toxocara spp. is still unknown. Using a CLR-hFc fusion protein library, T. canis and T. cati L3 somatic antigens (TSOM) were bound by a variety of CLRs in enzyme-linked immunosorbent assay (ELISA), while their TES products interacted with macrophage galactose-type lectin-1 (MGL-1). Two prominent candidate CLRs, MGL-1 and macrophage C-type lectin (MCL), were selected for further binding studies. Immunofluorescence microscopy revealed binding of MGL-1 to the oral aperture of L3. Immunoblot experiments identified distinct protein fractions representing potential ligands for MGL-1 and MCL. To evaluate how these interactions influence the host immune response, bone marrow-derived dendritic cell (BMDC) assays were performed, showing MCL-dependent T. cati-mediated cytokine production. In conclusion, MGL-1 and MCL are promising candidates for immune modulation during Toxocara infection, deserving further investigation in the future.
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19
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Prado Acosta M, Goyette-Desjardins G, Scheffel J, Dudeck A, Ruland J, Lepenies B. S-Layer From Lactobacillus brevis Modulates Antigen-Presenting Cell Functions via the Mincle-Syk-Card9 Axis. Front Immunol 2021; 12:602067. [PMID: 33732234 PMCID: PMC7957004 DOI: 10.3389/fimmu.2021.602067] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 02/08/2021] [Indexed: 12/17/2022] Open
Abstract
C-type lectin receptors (CLRs) are pattern recognition receptors that are crucial in the innate immune response. The gastrointestinal tract contributes significantly to the maintenance of immune homeostasis; it is the shelter for billions of microorganisms including many genera of Lactobacillus sp. Previously, it was shown that host-CLR interactions with gut microbiota play a crucial role in this context. The Macrophage-inducible C-type lectin (Mincle) is a Syk-coupled CLR that contributes to sensing of mucosa-associated commensals. In this study, we identified Mincle as a receptor for the Surface (S)-layer of the probiotic bacteria Lactobacillus brevis modulating GM-CSF bone marrow-derived cells (BMDCs) functions. We found that the S-layer/Mincle interaction led to a balanced cytokine response in BMDCs by triggering the release of both pro- and anti-inflammatory cytokines. In contrast, BMDCs derived from Mincle−/−, CARD9−/− or conditional Syk−/− mice failed to maintain this balance, thus leading to an increased production of the pro-inflammatory cytokines TNF and IL-6, whereas the levels of the anti-inflammatory cytokines IL-10 and TGF-β were markedly decreased. Importantly, this was accompanied by an altered CD4+ T cell priming capacity of Mincle−/− BMDCs resulting in an increased CD4+ T cell IFN-γ production upon stimulation with L. brevis S-layer. Our results contribute to the understanding of how commensal bacteria regulate antigen-presenting cell (APC) functions and highlight the importance of the Mincle/Syk/Card9 axis in APCs as a key factor in host-microbiota interactions.
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Affiliation(s)
- Mariano Prado Acosta
- Research Center for Emerging Infections and Zoonoses, Institute for Immunology, University of Veterinary Medicine, Hannover, Germany
| | - Guillaume Goyette-Desjardins
- Research Center for Emerging Infections and Zoonoses, Institute for Immunology, University of Veterinary Medicine, Hannover, Germany
| | - Jörg Scheffel
- Dermatological Allergology, Allergie-Centrum-Charité, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Germany
| | - Anne Dudeck
- Medical Faculty, Institute for Molecular and Clinical Immunology, Otto-von-Guericke Universität Magdeburg, Magdeburg, Germany
| | - Jürgen Ruland
- School of Medicine, Institute of Clinical Chemistry and Pathobiochemistry, Technical University of Munich, Munich, Germany.,German Cancer Consortium (DKTK), Partner Site Munich, Munich, Germany.,German Center for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Bernd Lepenies
- Research Center for Emerging Infections and Zoonoses, Institute for Immunology, University of Veterinary Medicine, Hannover, Germany
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20
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Singh H, Koury J, Kaul M. Innate Immune Sensing of Viruses and Its Consequences for the Central Nervous System. Viruses 2021; 13:v13020170. [PMID: 33498715 PMCID: PMC7912342 DOI: 10.3390/v13020170] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 12/13/2022] Open
Abstract
Viral infections remain a global public health concern and cause a severe societal and economic burden. At the organismal level, the innate immune system is essential for the detection of viruses and constitutes the first line of defense. Viral components are sensed by host pattern recognition receptors (PRRs). PRRs can be further classified based on their localization into Toll-like receptors (TLRs), C-type lectin receptors (CLR), retinoic acid-inducible gene-I (RIG-I)-like receptors (RLRs), NOD-like receptors (NLRs) and cytosolic DNA sensors (CDS). TLR and RLR signaling results in production of type I interferons (IFNα and -β) and pro-inflammatory cytokines in a cell-specific manner, whereas NLR signaling leads to the production of interleukin-1 family proteins. On the other hand, CLRs are capable of sensing glycans present in viral pathogens, which can induce phagocytic, endocytic, antimicrobial, and pro- inflammatory responses. Peripheral immune sensing of viruses and the ensuing cytokine response can significantly affect the central nervous system (CNS). But viruses can also directly enter the CNS via a multitude of routes, such as the nasal epithelium, along nerve fibers connecting to the periphery and as cargo of infiltrating infected cells passing through the blood brain barrier, triggering innate immune sensing and cytokine responses directly in the CNS. Here, we review mechanisms of viral immune sensing and currently recognized consequences for the CNS of innate immune responses to viruses.
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Affiliation(s)
- Hina Singh
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA; (H.S.); (J.K.)
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Jeffrey Koury
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA; (H.S.); (J.K.)
| | - Marcus Kaul
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA; (H.S.); (J.K.)
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
- Correspondence:
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21
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Silva MC, Fernandes Â, Oliveira M, Resende C, Correia A, de-Freitas-Junior JC, Lavelle A, Andrade-da-Costa J, Leander M, Xavier-Ferreira H, Bessa J, Pereira C, Henrique RM, Carneiro F, Dinis-Ribeiro M, Marcos-Pinto R, Lima M, Lepenies B, Sokol H, Machado JC, Vilanova M, Pinho SS. Glycans as Immune Checkpoints: Removal of Branched N-glycans Enhances Immune Recognition Preventing Cancer Progression. Cancer Immunol Res 2020; 8:1407-1425. [PMID: 32933968 DOI: 10.1158/2326-6066.cir-20-0264] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/03/2020] [Accepted: 09/08/2020] [Indexed: 11/16/2022]
Abstract
Tumor growth is accompanied with dramatic changes in the cellular glycome, such as the aberrant expression of complex branched N-glycans. However, the role of this protumoral N-glycan in immune evasion and whether its removal contributes to enhancement of immune recognition and to unleashing an antitumor immune response remain elusive. We demonstrated that branched N-glycans are used by colorectal cancer cells to escape immune recognition, instructing the creation of immunosuppressive networks through inhibition of IFNγ. The removal of this "glycan-mask" exposed immunogenic mannose glycans that potentiated immune recognition by DC-SIGN-expressing immune cells, resulting in an effective antitumor immune response. We revealed a glycoimmune checkpoint in colorectal cancer, highlighting the therapeutic efficacy of its deglycosylation to potentiate immune recognition and, thus, improving cancer immunotherapy.
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Affiliation(s)
- Mariana C Silva
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal.,Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Ângela Fernandes
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal
| | - Maria Oliveira
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal
| | - Carlos Resende
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal
| | - Alexandra Correia
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal.,Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Julio C de-Freitas-Junior
- Cellular and Molecular Oncobiology Program, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Aonghus Lavelle
- Sorbonne Université, INSERM, Saint-Antoine Research Center (CRSA), Paris, France
| | - Jéssica Andrade-da-Costa
- Cellular and Molecular Oncobiology Program, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Magdalena Leander
- Department of Hematology, Hospital Center of Porto, Porto, Portugal.,Multidisciplinary Unit for Biomedical Research, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Helena Xavier-Ferreira
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal.,Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - José Bessa
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal
| | - Carina Pereira
- CINTESIS - Centre for Health Technology and Services Research, University of Porto, Porto, Portugal.,Molecular Oncology and Viral Pathology Group, IPO Porto Research Group (CI-IPOP), Portuguese Oncology Institute of Porto (IPO Porto), Porto, Portugal
| | - Rui M Henrique
- Department of Pathology and Cancer Biology and Epigenetics Group, IPO Porto Research Center (CI-IPOP), Portuguese Oncology Institute of Porto (IPO Porto), Porto, Portugal.,Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Fátima Carneiro
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal.,Department of Pathology, Hospital Center of São João, Porto, Portugal.,Faculty of Medicine, University of Porto, Porto, Portugal
| | - Mário Dinis-Ribeiro
- CINTESIS - Centre for Health Technology and Services Research, University of Porto, Porto, Portugal.,Department of Gastroenterology, Portuguese Oncology Institute of Porto (IPO Porto), Porto, Portugal
| | - Ricardo Marcos-Pinto
- Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal.,Department of Gastroenterology, Hospital Center of Porto, Porto, Portugal.,Medical Faculty, Centre for Research in Health Technologies and Information Systems, Porto, Portugal
| | - Margarida Lima
- Department of Hematology, Hospital Center of Porto, Porto, Portugal.,Multidisciplinary Unit for Biomedical Research, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Bernd Lepenies
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany.,Immunology Unit and Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Harry Sokol
- Sorbonne Université, INSERM, Saint-Antoine Research Center (CRSA), Paris, France.,INRA, UMR1319 Micalis, AgroParisTech, Jouy-en-Josas, France.,Department of Gastroenterology, Saint Antoine Hospital, Assistance Publique - Hopitaux de Paris, Sorbonne Universités, Paris, France
| | - José C Machado
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal.,Faculty of Medicine, University of Porto, Porto, Portugal
| | - Manuel Vilanova
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal.,Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Salomé S Pinho
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal. .,Faculty of Medicine, University of Porto, Porto, Portugal
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22
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The C-type Lectin Receptor CLEC12A Recognizes Plasmodial Hemozoin and Contributes to Cerebral Malaria Development. Cell Rep 2020; 28:30-38.e5. [PMID: 31269448 PMCID: PMC6616648 DOI: 10.1016/j.celrep.2019.06.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 03/15/2019] [Accepted: 06/04/2019] [Indexed: 01/04/2023] Open
Abstract
Malaria represents a major cause of death from infectious disease. Hemozoin is a Plasmodium-derived product that contributes to progression of cerebral malaria. However, there is a gap of knowledge regarding how hemozoin is recognized by innate immunity. Myeloid C-type lectin receptors (CLRs) encompass a family of carbohydrate-binding receptors that act as pattern recognition receptors in innate immunity. In the present study, we identify the CLR CLEC12A as a receptor for hemozoin. Dendritic cell-T cell co-culture assays indicate that the CLEC12A/hemozoin interaction enhances CD8+ T cell cross-priming. Using the Plasmodium berghei Antwerpen-Kasapa (ANKA) mouse model of experimental cerebral malaria (ECM), we find that CLEC12A deficiency protects mice from ECM, illustrated by reduced ECM incidence and ameliorated clinical symptoms. In conclusion, we identify CLEC12A as an innate sensor of plasmodial hemozoin. CLEC12A recognizes plasmodial hemozoin The CLEC12A/hemozoin interaction enhances CD8+ T cell cross-priming in vitro CLEC12A−/− mice are protected from experimental cerebral malaria
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23
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Malamud M, Cavallero GJ, Casabuono AC, Lepenies B, Serradell MDLÁ, Couto AS. Immunostimulation by Lactobacillus kefiri S-layer proteins with distinct glycosylation patterns requires different lectin partners. J Biol Chem 2020; 295:14430-14444. [PMID: 32817316 DOI: 10.1074/jbc.ra120.013934] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 08/12/2020] [Indexed: 12/12/2022] Open
Abstract
S-layer (glyco)-proteins (SLPs) form a nanostructured envelope that covers the surface of different prokaryotes and show immunomodulatory activity. Previously, we have demonstrated that the S-layer glycoprotein from probiotic Lactobacillus kefiri CIDCA 8348 (SLP-8348) is recognized by Mincle (macrophage inducible C-type lectin receptor), and its adjuvanticity depends on the integrity of its glycans. However, the glycan's structure has not been described so far. Herein, we analyze the glycosylation pattern of three SLPs, SLP-8348, SLP-8321, and SLP-5818, and explore how these patterns impact their recognition by C-type lectin receptors and the immunomodulatory effect of the L. kefiri SLPs on antigen-presenting cells. High-performance anion-exchange chromatography-pulse amperometric detector performed after β-elimination showed glucose as the major component in the O-glycans of the three SLPs; however, some differences in the length of hexose chains were observed. No N-glycosylation signals were detected in SLP-8348 and SLP-8321, but SLP-5818 was observed to have two sites carrying complex N-glycans based on a site-specific analysis and a glycomic workflow of the permethylated glycans. SLP-8348 was previously shown to enhance LPS-induced activation on both RAW264.7 macrophages and murine bone marrow-derived dendritic cells; we now show that SLP-8321 and SLP-5818 have a similar effect regardless of the differences in their glycosylation patterns. Studies performed with bone marrow-derived dendritic cells from C-type lectin receptor-deficient mice revealed that the immunostimulatory activity of SLP-8321 depends on its recognition by Mincle, whereas SLP-5818's effects are dependent on SignR3 (murine ortholog of human DC-SIGN). These findings encourage further investigation of both the potential application of these SLPs as new adjuvants and the protein glycosylation mechanisms in these bacteria.
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Affiliation(s)
- Mariano Malamud
- Cátedra de Microbiología, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina.,University of Veterinary Medicine Hannover, Immunology Unit & Research Center for Emerging Infections and Zoonoses, Hannover, Germany
| | - Gustavo J Cavallero
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica-Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigación en Hidratos de Carbono, Buenos Aires, Argentina
| | - Adriana C Casabuono
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica-Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigación en Hidratos de Carbono, Buenos Aires, Argentina
| | - Bernd Lepenies
- University of Veterinary Medicine Hannover, Immunology Unit & Research Center for Emerging Infections and Zoonoses, Hannover, Germany
| | - María de Los Ángeles Serradell
- Cátedra de Microbiología, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina
| | - Alicia S Couto
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica-Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigación en Hidratos de Carbono, Buenos Aires, Argentina
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24
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Hui D, Rui-Zhi T, Jian-Chun L, Xia Z, Dan W, Jun-Ming F, Li W. Astragalus propinquus Schischkin and Panax notoginseng (A&P) compound relieved cisplatin-induced acute kidney injury through inhibiting the mincle maintained macrophage inflammation. JOURNAL OF ETHNOPHARMACOLOGY 2020; 252:112637. [PMID: 32004631 DOI: 10.1016/j.jep.2020.112637] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 01/18/2020] [Accepted: 01/26/2020] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Acute kidney injury (AKI) is a common disease in hospitalized patients, especially in critically ill patients. It is characterised with high morbidity and mortality, and is also an important cause of chronic kidney disease and chronic renal failure. Astragalus propinquus Schischkin and Panax notoginseng (A&P) compound, a famous traditional Chinese medicine, consists of Astragalus propinquus Schischkin, Panax notoginseng, Angelica sinensis, Achyranthes bidentata, and Ecklonia kurome, has been widely used for the treatment of various kidney diseases in the southwest of China. However, the effects of A&P on treatment of AKI and its underlying mechanism are needed to be uncovered. AIM OF THE STUDY Recent researches reported that Mincle (Macrophage-inducible C-type lectin) plays a key role in renal injury of AKI by regulating the expression and secretion of inflammatory cytokines on macrophage through modulating NF-κB signaling pathway. Here, we aimed to investigate the renoprotective effect of A&P on AKI and whether by inhibiting Mincle. MATERIALS AND METHODS We established a lipopolysaccharide (LPS)-induced Bone Marrow-Derived Macrophage (BMDM) inflammatory cell model and a cisplatin-induced mouse AKI model in vitro and in vivo. Renal histopathology staining was performed to observe kidney morphology. The expression and secretion of inflammatory cytokines were detected by real-time PCR and Enzyme-linked immunosorbent assay. Western blotting was used to detect the protein levels and Flow cytometry performed to detect polarization of macrophage. RESULTS The results showed that A&P significantly reduced the mRNA expression of IL-1β, IL-6, TNFα and MCP-1 in LPS-stimulated BMDM cells, and secretion of IL-1β and IL-6 in supernatant. The same results were found in Cisplatin-induced AKI kidney and serum after treatment with A&P. The data also showed that A&P strongly reduced the mRNA and protein levels of Mincle in vitro and vivo, and also inhibited the activation of Syk and NF-κB. Notably, A&P down-regulated the M1 macrophage marker iNOS, which may relate to the inhibition of Mincle. Interestingly, both overexpression of Mincle by transfection of pcDNA3.1-Mincle plasmid and administration of TDB (a ligand of Mincle) can significantly abolished the A&P-inhibited inflammation in BMDM, suggesting Mincle pathway play a key role in macrophage inflammation in AKI. CONCLUSION Our findings indicated that A&P protected kidney from inhibiting inflammation through down-regulating of Mincle pathway in macrophage in AKI. It provides a potential medicine compound for the treatment of AKI.
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Affiliation(s)
- Diao Hui
- Research Center of Combine Traditional Chinese and Western Medicine, Affiliated Traditional Medicine Hospital, Southwest Medical University, Luzhou, 646000, Sichuan, China; Department of Nephrology, Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Tan Rui-Zhi
- Research Center of Combine Traditional Chinese and Western Medicine, Affiliated Traditional Medicine Hospital, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Li Jian-Chun
- Research Center of Combine Traditional Chinese and Western Medicine, Affiliated Traditional Medicine Hospital, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Zhong Xia
- Research Center of Combine Traditional Chinese and Western Medicine, Affiliated Traditional Medicine Hospital, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Wen Dan
- Research Center of Combine Traditional Chinese and Western Medicine, Affiliated Traditional Medicine Hospital, Southwest Medical University, Luzhou, 646000, Sichuan, China; Department of Nephrology, Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Fan Jun-Ming
- Chengdu Medical College, Chengdu, 610000, Sichuan, China; Research Center of Combine Traditional Chinese and Western Medicine, Affiliated Traditional Medicine Hospital, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Wang Li
- Research Center of Combine Traditional Chinese and Western Medicine, Affiliated Traditional Medicine Hospital, Southwest Medical University, Luzhou, 646000, Sichuan, China.
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25
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Lindenwald DL, Monteiro JT, Rautenschlein S, Meens J, Jung K, Becker SC, Lepenies B. Ovine C-type lectin receptor hFc-fusion protein library - A novel platform to screen for host-pathogen interactions. Vet Immunol Immunopathol 2020; 224:110047. [PMID: 32325253 DOI: 10.1016/j.vetimm.2020.110047] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 02/13/2020] [Accepted: 03/26/2020] [Indexed: 12/23/2022]
Abstract
C-type lectin receptors (CTLRs) are pattern recognition receptors which are important constituents of the innate immunity. However, their role has mostly been studied in humans and in mouse models. To bridge the knowledge gap concerning CTLRs of veterinary relevant species, a novel ovine CTLR hFc-fusion protein library which allows in vitro ligand identification and pathogen binding studies has been established. Its utility was tested with known ligands of corresponding murine CTLRs in ELISA- and flow cytometry based binding studies. The ovine CTLR-hFc library was subsequently used in a proof-of-principle pathogen binding study with the ruminant pathogen Mycoplasma mycoides subsp. capri. Some ovine CTLRs, such as Dendritic Cell Immunoreceptor (DCIR, Clec4a), Macrophage C-Type Lectin (MCL, Clec4d) and Myeloid Inhibitory C-Type Lectin-Like Receptor (MICL, Clec12a) were identified as possible candidate receptors whose role in Mycoplasma recognition can now be unraveled in further studies. This study thus shows the utility of this novel ovine CTLR-hFc fusion protein library to screen for CTLR/pathogen interactions.
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Affiliation(s)
- Dimitri L Lindenwald
- Immunology Unit & Research Center for Emerging Infections and Zoonoses (RIZ), University for Veterinary Medicine Hannover, Foundation. Hannover, Germany
| | - João T Monteiro
- Immunology Unit & Research Center for Emerging Infections and Zoonoses (RIZ), University for Veterinary Medicine Hannover, Foundation. Hannover, Germany
| | - Silke Rautenschlein
- Clinic for Poultry, University for Veterinary Medicine Hannover, Foundation. Hannover, Germany
| | - Jochen Meens
- Institute for Microbiology, University for Veterinary Medicine Hannover, Foundation. Hannover, Germany
| | - Klaus Jung
- Institute for Animal Breeding and Genetics & Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Foundation. Hannover, Germany
| | - Stefanie C Becker
- Institute for Parasitology & Research Center for Emerging Infections and Zoonoses (RIZ), University for Veterinary Medicine Hannover, Foundation. Hannover, Germany
| | - Bernd Lepenies
- Immunology Unit & Research Center for Emerging Infections and Zoonoses (RIZ), University for Veterinary Medicine Hannover, Foundation. Hannover, Germany.
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26
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Physiological and Pathological Functions of CARD9 Signaling in the Innate Immune System. Curr Top Microbiol Immunol 2020; 429:177-203. [PMID: 32415389 DOI: 10.1007/82_2020_211] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Caspase recruitment domain protein 9 (CARD9) forms essential signaling complexes in the innate immune system that integrate cues from C-type lectin receptors and specific intracellular pattern recognition receptors. These CARD9-mediated signals are pivotal for host defense against fungi, and they mediate immunity against certain bacteria, viruses and parasites. Furthermore, CARD9-regulated pathways are involved in sterile inflammatory responses critical for immune homeostasis and can control pro- and antitumor immunity in cancer microenvironments. Consequently, multiple genetic alterations of human CARD9 are connected to primary immunodeficiencies or prevalent inflammatory disorders in patients. This review will summarize our current understanding of CARD9 signaling in the innate immune system, its physiological and pathological functions and their implications for human immune-mediated diseases.
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27
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Roesner LM, Ernst M, Chen W, Begemann G, Kienlin P, Raulf MK, Lepenies B, Werfel T. Human thioredoxin, a damage-associated molecular pattern and Malassezia-crossreactive autoallergen, modulates immune responses via the C-type lectin receptors Dectin-1 and Dectin-2. Sci Rep 2019; 9:11210. [PMID: 31371767 PMCID: PMC6671947 DOI: 10.1038/s41598-019-47769-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 07/23/2019] [Indexed: 12/27/2022] Open
Abstract
Human thioredoxin (hTrx), which can be secreted from cells upon stress, functions in allergic skin inflammation as a T cell antigen due to homology and cross-reactivity with the fungal allergen Mala s13 of the skin-colonizing yeast Malassezia sympodialis. Recent studies have shown that cell wall polysaccharides of Malassezia are detected by the immune system via the C-type lectin receptors Dectin-1 and Dectin-2, which are expressed on myeloid cells. Therefore, this study aimed to investigate a putative interaction between Dectin-1, Dectin-2 and the allergens Mala s13 and hTrx. Stimulation of human monocyte-derived dendritic cells or macrophages with Mala s13 or hTrx resulted in remarkable secretion of IL-1β and IL-23. Blocking experiments suggest that hTrx induces IL-23 by Dectin-1 binding and IL-1β by binding to either Dectin-1 or Dectin-2. Regarding Mala s13, Dectin-1 appears to be involved in IL-1β signaling. Interference of Syk kinase function was performed to investigate downstream signaling, which led to diminished hTrx responses. In our experiments, we observed rapid internalization of Mala s13 and hTrx upon cell contact and we were able to confirm direct interaction with Dectin-1 as well as Dectin-2 applying a fusion protein screening platform. We hypothesize that this cytokine response may result in a Th2/Th17-polarizing milieu, which may play a key role during the allergic sensitization in the skin, where allergen presentation to T cells is accompanied by microbial colonization and skin inflammation.
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Affiliation(s)
- L M Roesner
- Hannover Medical School, Department of Dermatology and Allergy, Division of Immunodermatology and Allergy Research, Hannover, Germany.
| | - M Ernst
- Hannover Medical School, Department of Dermatology and Allergy, Division of Immunodermatology and Allergy Research, Hannover, Germany
| | - W Chen
- Hannover Medical School, Department of Dermatology and Allergy, Division of Immunodermatology and Allergy Research, Hannover, Germany
| | - G Begemann
- Hannover Medical School, Department of Dermatology and Allergy, Division of Immunodermatology and Allergy Research, Hannover, Germany
| | - P Kienlin
- Hannover Medical School, Department of Dermatology and Allergy, Division of Immunodermatology and Allergy Research, Hannover, Germany
| | - M K Raulf
- University of Veterinary Medicine Hannover, Immunology Unit & Research Center for Emerging Infections and Zoonoses (RIZ), Hannover, Germany.,University of Veterinary Medicine Hannover, Institute for Parasitology, Hannover, Germany
| | - B Lepenies
- University of Veterinary Medicine Hannover, Immunology Unit & Research Center for Emerging Infections and Zoonoses (RIZ), Hannover, Germany
| | - T Werfel
- Hannover Medical School, Department of Dermatology and Allergy, Division of Immunodermatology and Allergy Research, Hannover, Germany
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