1
|
Hezinger L, Bauer S, Ellwanger K, Piotrowsky A, Biber F, Venturelli S, Kufer TA. NOD1 cooperates with HAX-1 to promote cell migration in a RIPK2- and NF-ĸB-independent manner. FEBS J 2023; 290:5295-5312. [PMID: 37488967 DOI: 10.1111/febs.16912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 06/13/2023] [Accepted: 07/21/2023] [Indexed: 07/26/2023]
Abstract
The human Nod-like receptor protein NOD1 is a well-described pattern-recognition receptor (PRR) with diverse functions. NOD1 associates with F-actin and its protein levels are upregulated in metastatic cancer cells. A hallmark of cancer cells is their ability to migrate, which involves actin remodelling. Using chemotaxis and wound healing assays, we show that NOD1 expression correlated with the migration rate and chemotactic index in the cervical carcinoma cell line HeLa. The effect of NOD1 in cell migration was independent of the downstream kinase RIPK2 and NF-ĸB activity. Additionally, NOD1 negatively regulated the phosphorylation status of cofilin, which inhibits actin turnover. Co-immunoprecipitation assays identified HCLS1-associated protein X-1 (HAX-1) as a previously unknown interaction partner of NOD1. Silencing of HAX-1 expression reduced the migration behaviour to similar levels as NOD1 knockdown, and simultaneous knockdown of NOD1 and HAX-1 showed no additive effect, suggesting that both proteins act in the same pathway. In conclusion, our data revealed an important role of the PRR NOD1 in regulating cell migration as well as chemotaxis in human cervical cancer cells and identified HAX-1 as a protein that interacts with NOD1 and is involved in this signalling pathway.
Collapse
Affiliation(s)
- Lucy Hezinger
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Sarah Bauer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Kornelia Ellwanger
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Alban Piotrowsky
- Department of Biochemistry of Nutrition, University of Hohenheim, Stuttgart, Germany
| | - Felix Biber
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Sascha Venturelli
- Department of Biochemistry of Nutrition, University of Hohenheim, Stuttgart, Germany
- Department of Vegetative and Clinical Physiology, Institute of Physiology, University Hospital Tuebingen, Germany
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| |
Collapse
|
2
|
Thapa HB, Kohl P, Zingl FG, Fleischhacker D, Wolinski H, Kufer TA, Schild S. Characterization of the Inflammatory Response Evoked by Bacterial Membrane Vesicles in Intestinal Cells Reveals an RIPK2-Dependent Activation by Enterotoxigenic Escherichia coli Vesicles. Microbiol Spectr 2023; 11:e0111523. [PMID: 37306596 PMCID: PMC10433812 DOI: 10.1128/spectrum.01115-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 05/23/2023] [Indexed: 06/13/2023] Open
Abstract
Although the immunomodulatory potency of bacterial membrane vesicles (MVs) is widely acknowledged, their interactions with host cells and the underlying signaling pathways have not been well studied. Herein, we provide a comparative analysis of the proinflammatory cytokine profile secreted by human intestinal epithelial cells exposed to MVs derived from 32 gut bacteria. In general, outer membrane vesicles (OMVs) from Gram-negative bacteria induced a stronger proinflammatory response than MVs from Gram-positive bacteria. However, the quality and quantity of cytokine induction varied between MVs from different species, highlighting their unique immunomodulatory properties. OMVs from enterotoxigenic Escherichia coli (ETEC) were among those showing the strongest proinflammatory potency. In depth analyses revealed that the immunomodulatory activity of ETEC OMVs relies on a so far unprecedented two-step mechanism, including their internalization into host cells followed by intracellular recognition. First, OMVs are efficiently taken up by intestinal epithelial cells, which mainly depends on caveolin-mediated endocytosis as well as the presence of the outer membrane porins OmpA and OmpF on the MVs. Second, lipopolysaccharide (LPS) delivered by OMVs is intracellularly recognized by novel caspase- and RIPK2-dependent pathways. This recognition likely occurs via detection of the lipid A moiety as ETEC OMVs with underacylated LPS exhibited reduced proinflammatory potency but similar uptake dynamics compared to OMVs derived from wild-type (WT) ETEC. Intracellular recognition of ETEC OMVs in intestinal epithelial cells is pivotal for the proinflammatory response as inhibition of OMV uptake also abolished cytokine induction. The study signifies the importance of OMV internalization by host cells to exercise their immunomodulatory activities. IMPORTANCE The release of membrane vesicles from the bacterial cell surface is highly conserved among most bacterial species, including outer membrane vesicles (OMVs) from Gram-negative bacteria as well as vesicles liberated from the cytoplasmic membrane of Gram-positive bacteria. It is becoming increasingly evident that these multifactorial spheres, carrying membranous, periplasmic, and even cytosolic content, contribute to intra- and interspecies communication. In particular, gut microbiota and the host engage in a myriad of immunogenic and metabolic interactions. This study highlights the individual immunomodulatory activities of bacterial membrane vesicles from different enteric species and provides new mechanistic insights into the recognition of ETEC OMVs by human intestinal epithelial cells.
Collapse
Affiliation(s)
- Himadri B. Thapa
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Paul Kohl
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Franz G. Zingl
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | | | - Heimo Wolinski
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
- Field of Excellence Biohealth, University of Graz, Graz, Austria
| | - Thomas A. Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Stefan Schild
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
- Field of Excellence Biohealth, University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
| |
Collapse
|
3
|
Tran LS, Ying L, D'Costa K, Wray-McCann G, Kerr G, Le L, Allison CC, Ferrand J, Chaudhry H, Emery J, De Paoli A, Colon N, Creed S, Kaparakis-Liaskos M, Como J, Dowling JK, Johanesen PA, Kufer TA, Pedersen JS, Mansell A, Philpott DJ, Elgass KD, Abud HE, Nachbur U, Croker BA, Masters SL, Ferrero RL. NOD1 mediates interleukin-18 processing in epithelial cells responding to Helicobacter pylori infection in mice. Nat Commun 2023; 14:3804. [PMID: 37365163 DOI: 10.1038/s41467-023-39487-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 06/15/2023] [Indexed: 06/28/2023] Open
Abstract
The interleukin-1 family members, IL-1β and IL-18, are processed into their biologically active forms by multi-protein complexes, known as inflammasomes. Although the inflammasome pathways that mediate IL-1β processing in myeloid cells have been defined, those involved in IL-18 processing, particularly in non-myeloid cells, are still not well understood. Here we report that the host defence molecule NOD1 regulates IL-18 processing in mouse epithelial cells in response to the mucosal pathogen, Helicobacter pylori. Specifically, NOD1 in epithelial cells mediates IL-18 processing and maturation via interactions with caspase-1, instead of the canonical inflammasome pathway involving RIPK2, NF-κB, NLRP3 and ASC. NOD1 activation and IL-18 then help maintain epithelial homoeostasis to mediate protection against pre-neoplastic changes induced by gastric H. pylori infection in vivo. Our findings thus demonstrate a function for NOD1 in epithelial cell production of bioactive IL-18 and protection against H. pylori-induced pathology.
Collapse
Affiliation(s)
- L S Tran
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Molecular and Translational Science, Monash University, Melbourne, VIC, Australia
| | - L Ying
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Molecular and Translational Science, Monash University, Melbourne, VIC, Australia
| | - K D'Costa
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - G Wray-McCann
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - G Kerr
- Department of Anatomy and Developmental Biology, Development and Stem Cells Program, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - L Le
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - C C Allison
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - J Ferrand
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - H Chaudhry
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - J Emery
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Molecular and Translational Science, Monash University, Melbourne, VIC, Australia
| | - A De Paoli
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - N Colon
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - S Creed
- Monash Micro Imaging, Monash University, Melbourne, VIC, Australia
| | - M Kaparakis-Liaskos
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - J Como
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - J K Dowling
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - P A Johanesen
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - T A Kufer
- Department of Immunology, University of Hohenheim, Institute of Nutritional Medicine, Stuttgart, Germany
| | | | - A Mansell
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Molecular and Translational Science, Monash University, Melbourne, VIC, Australia
| | - D J Philpott
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - K D Elgass
- Monash Micro Imaging, Monash University, Melbourne, VIC, Australia
| | - H E Abud
- Department of Anatomy and Developmental Biology, Development and Stem Cells Program, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - U Nachbur
- Cell Signalling and Cell Death Division, WEHI, Melbourne, VIC, Australia
| | - B A Croker
- Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
- Inflammation Division, WEHI, Melbourne, VIC, Australia
| | - S L Masters
- Inflammation Division, WEHI, Melbourne, VIC, Australia
| | - R L Ferrero
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia.
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia.
- Inflammation Division, WEHI, Melbourne, VIC, Australia.
| |
Collapse
|
4
|
Bauer S, Hezinger L, Rexhepi F, Ramanathan S, Kufer TA. NOD-like Receptors-Emerging Links to Obesity and Associated Morbidities. Int J Mol Sci 2023; 24:ijms24108595. [PMID: 37239938 DOI: 10.3390/ijms24108595] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/06/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
Obesity and its associated metabolic morbidities have been and still are on the rise, posing a major challenge to health care systems worldwide. It has become evident over the last decades that a low-grade inflammatory response, primarily proceeding from the adipose tissue (AT), essentially contributes to adiposity-associated comorbidities, most prominently insulin resistance (IR), atherosclerosis and liver diseases. In mouse models, the release of pro-inflammatory cytokines such as TNF-alpha (TNF-α) and interleukin (IL)-1β and the imprinting of immune cells to a pro-inflammatory phenotype in AT play an important role. However, the underlying genetic and molecular determinants are not yet understood in detail. Recent evidence demonstrates that nucleotide-binding and oligomerization domain (NOD)-like receptor (NLR) family proteins, a group of cytosolic pattern recognition receptors (PRR), contribute to the development and control of obesity and obesity-associated inflammatory responses. In this article, we review the current state of research on the role of NLR proteins in obesity and discuss the possible mechanisms leading to and the outcomes of NLR activation in the obesity-associated morbidities IR, type 2 diabetes mellitus (T2DM), atherosclerosis and non-alcoholic fatty liver disease (NAFLD) and discuss emerging ideas about possibilities for NLR-based therapeutic interventions of metabolic diseases.
Collapse
Affiliation(s)
- Sarah Bauer
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Lucy Hezinger
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Fjolla Rexhepi
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
| | - Sheela Ramanathan
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
| | - Thomas A Kufer
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany
| |
Collapse
|
5
|
Santharam MA, Shukla A, Levesque D, Kufer TA, Boisvert FM, Ramanathan S, Ilangumaran S. NLRC5-CIITA Fusion Protein as an Effective Inducer of MHC-I Expression and Antitumor Immunity. Int J Mol Sci 2023; 24:ijms24087206. [PMID: 37108368 PMCID: PMC10138588 DOI: 10.3390/ijms24087206] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 04/05/2023] [Accepted: 04/11/2023] [Indexed: 04/29/2023] Open
Abstract
Aggressive tumors evade cytotoxic T lymphocytes by suppressing MHC class-I (MHC-I) expression that also compromises tumor responsiveness to immunotherapy. MHC-I defects strongly correlate to defective expression of NLRC5, the transcriptional activator of MHC-I and antigen processing genes. In poorly immunogenic B16 melanoma cells, restoring NLRC5 expression induces MHC-I and elicits antitumor immunity, raising the possibility of using NLRC5 for tumor immunotherapy. As the clinical application of NLRC5 is constrained by its large size, we examined whether a smaller NLRC5-CIITA fusion protein, dubbed NLRC5-superactivator (NLRC5-SA) as it retains the ability to induce MHC-I, could be used for tumor growth control. We show that stable NLRC5-SA expression in mouse and human cancer cells upregulates MHC-I expression. B16 melanoma and EL4 lymphoma tumors expressing NLRC5-SA are controlled as efficiently as those expressing full-length NLRC5 (NLRC5-FL). Comparison of MHC-I-associated peptides (MAPs) eluted from EL4 cells expressing NLRC5-FL or NLRC5-SA and analyzed by mass spectrometry revealed that both NLRC5 constructs expanded the MAP repertoire, which showed considerable overlap but also included a substantial proportion of distinct peptides. Thus, we propose that NLRC5-SA, with its ability to increase tumor immunogenicity and promote tumor growth control, could overcome the limitations of NLRC5-FL for translational immunotherapy applications.
Collapse
Affiliation(s)
- Madanraj Appiya Santharam
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Akhil Shukla
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Dominique Levesque
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70593 Stuttgart, Germany
| | - François-Michel Boisvert
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
- CRCHUS, Centre Hospitalier de l'Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Sheela Ramanathan
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
- CRCHUS, Centre Hospitalier de l'Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Subburaj Ilangumaran
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
- CRCHUS, Centre Hospitalier de l'Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| |
Collapse
|
6
|
Próchnicki T, Vasconcelos MB, Robinson KS, Mangan MSJ, De Graaf D, Shkarina K, Lovotti M, Standke L, Kaiser R, Stahl R, Duthie FG, Rothe M, Antonova K, Jenster LM, Lau ZH, Rösing S, Mirza N, Gottschild C, Wachten D, Günther C, Kufer TA, Schmidt FI, Zhong FL, Latz E. Mitochondrial damage activates the NLRP10 inflammasome. Nat Immunol 2023; 24:595-603. [PMID: 36941400 DOI: 10.1038/s41590-023-01451-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 02/06/2023] [Indexed: 03/23/2023]
Abstract
Upon detecting pathogens or cell stress, several NOD-like receptors (NLRs) form inflammasome complexes with the adapter ASC and caspase-1, inducing gasdermin D (GSDMD)-dependent cell death and maturation and release of IL-1β and IL-18. The triggers and activation mechanisms of several inflammasome-forming sensors are not well understood. Here we show that mitochondrial damage activates the NLRP10 inflammasome, leading to ASC speck formation and caspase-1-dependent cytokine release. While the AIM2 inflammasome can also sense mitochondrial demise by detecting mitochondrial DNA (mtDNA) in the cytosol, NLRP10 monitors mitochondrial integrity in an mtDNA-independent manner, suggesting the recognition of distinct molecular entities displayed by the damaged organelles. NLRP10 is highly expressed in differentiated human keratinocytes, in which it can also assemble an inflammasome. Our study shows that this inflammasome surveils mitochondrial integrity. These findings might also lead to a better understanding of mitochondria-linked inflammatory diseases.
Collapse
Affiliation(s)
- Tomasz Próchnicki
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | | | - Kim S Robinson
- A*STAR Skin Research Labs (A*SRL), Clinical Sciences Building, Singapore, Singapore
- Skin Research Institute of Singapore (SRIS), Clinical Sciences Building, Singapore, Singapore
| | - Matthew S J Mangan
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Dennis De Graaf
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Kateryna Shkarina
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Marta Lovotti
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Lena Standke
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Romina Kaiser
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Rainer Stahl
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Fraser G Duthie
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Maximilian Rothe
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Kateryna Antonova
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Lea-Marie Jenster
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Zhi Heng Lau
- A*STAR Skin Research Labs (A*SRL), Clinical Sciences Building, Singapore, Singapore
- Skin Research Institute of Singapore (SRIS), Clinical Sciences Building, Singapore, Singapore
| | - Sarah Rösing
- Department of Dermatology, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Nora Mirza
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, Stuttgart, Stuttgart, Germany
| | - Clarissa Gottschild
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, Stuttgart, Stuttgart, Germany
| | - Dagmar Wachten
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Claudia Günther
- Department of Dermatology, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Thomas A Kufer
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, Stuttgart, Stuttgart, Germany
| | - Florian I Schmidt
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany
| | - Franklin L Zhong
- Skin Research Institute of Singapore (SRIS), Immunos, Singapore, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Eicke Latz
- Institute of Innate Immunity, Medical Faculty, University of Bonn, Bonn, Germany.
- German Center of Neurodegenerative Diseases (DZNE), Bonn, Germany.
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA.
| |
Collapse
|
7
|
Bauer S, Aeissen V, Bubeck AM, Kienes I, Ellwanger K, Scheurenbrand M, Rexhepi F, Ramanathan S, Rosenstiel P, Fricke WF, Kufer TA. NLRC5 affects diet-induced adiposity in female mice and co-regulates peroxisome proliferator-activated receptor PPARγ target genes. iScience 2023; 26:106313. [PMID: 36968073 PMCID: PMC10034470 DOI: 10.1016/j.isci.2023.106313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/11/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
Nucleotide-binding and oligomerization domain containing 5 (NLRC5) is the key transcriptional regulator of major histocompatibility (MHC) class I genes. Recent observations suggest a role for NLRC5 in metabolic traits and in transcriptional regulation beyond MHC class I genes. To understand the function of NLRC5 in metabolic disease, we subjected Nlrc5 -/- mice to high-fat diet (HFD) feeding. Female Nlrc5 -/- mice presented with higher weight gain and more adipose tissue (AT) compared to wild-type (WT) animals. Mechanistically, we demonstrate that NLRC5 enhanced the expression of peroxisome proliferator-activated receptor (PPAR) γ target genes in human cells. We identify Sin3A and negative elongation factor (NELF) B as two novel NLRC5 interaction partners and show that Sin3A partly modulates the synergistic transcriptional effect of NLRC5 on PPARγ. Collectively, we show that NLRC5 contributes to weight gain in mice, which involves transcriptional enhancement of PPARγ targets by NLRC5 that is co-regulated by Sin3A.
Collapse
Affiliation(s)
- Sarah Bauer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70599 Stuttgart, Germany
| | - Vanessa Aeissen
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70599 Stuttgart, Germany
| | - Alena M. Bubeck
- Department of Microbiome and Applied Bioinformatics, Institute of Nutritional Science, University of Hohenheim, 70599 Stuttgart, Germany
| | - Ioannis Kienes
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70599 Stuttgart, Germany
| | - Kornelia Ellwanger
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70599 Stuttgart, Germany
| | - Mona Scheurenbrand
- Department of Microbiome and Applied Bioinformatics, Institute of Nutritional Science, University of Hohenheim, 70599 Stuttgart, Germany
| | - Fjolla Rexhepi
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Sheela Ramanathan
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Philip Rosenstiel
- Institute of Clinical Molecular Biology, Christian-Albrechts University of Kiel, 24105 Kiel, Germany
| | - W. Florian Fricke
- Department of Microbiome and Applied Bioinformatics, Institute of Nutritional Science, University of Hohenheim, 70599 Stuttgart, Germany
| | - Thomas A. Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70599 Stuttgart, Germany
- Corresponding author
| |
Collapse
|
8
|
Kishore U, Kufer TA. Editorial: Updates on RIG-I-like receptor-mediated innate immune responses. Front Immunol 2023; 14:1153410. [PMID: 36845126 PMCID: PMC9948394 DOI: 10.3389/fimmu.2023.1153410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 01/31/2023] [Indexed: 02/11/2023] Open
Affiliation(s)
- Uday Kishore
- Department of Veterinary Medicine, United Arab Emirates University, Al Ain, United Arab Emirates
- Medical Research Council Immunochemistry Unit, Department of Biochemistry, University of Oxford, Oxford, United Kingdom
| | - Thomas A. Kufer
- Department of Immunology, Institute for Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| |
Collapse
|
9
|
Jiménez-Aspee F, Pospiech J, Bauer S, Sus N, Kufer TA, Frank J. Prumnopitys Andina Fruit Extract Activates Liver X Receptors after In Vitro Digestion. Mol Nutr Food Res 2023; 67:e2200377. [PMID: 36267033 DOI: 10.1002/mnfr.202200377] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 09/19/2022] [Indexed: 01/19/2023]
Abstract
SCOPE 20-Hydroxyecdysone (20E) is the main phytochemical present in the fresh arils of Prumnopitys andina. 20E is reported to have anabolic effects by modulation of gene transcription by interaction with nuclear receptors. Our aim is to evaluate the in vitro bioaccessibility, transepithelial transport of 20E, and the capacity of P. andina fruit extract and 20E to activate selected mammalian nuclear receptors in transiently transfected human cells after simulated gastrointestinal digestion. RESULTS 20E shows good stability, solubility, and micellization after in vitro digestion. 20E is taken up by Caco-2 cells, but poorly transported through the epithelial cell membrane, possibly due to P-glycoprotein-mediated efflux. In transiently transfected HepG2 cells, the fruit extract significantly induces the signal intensity for the liver X receptor (LXR)-α and -β by 1.6 and 1.4-fold, respectively. In contrast, the treatment with 20E, irrespective of its concentration, did not change the activity of both LXR receptors. No effects are observed for the pregnane X receptor or the constitutive androstane receptor. CONCLUSION Our findings show that components of the digested P. andina extract other than 20E are responsible for the effects on LXR-α and -β. Our findings open new perspectives on the potential role of P. andina fruits in cholesterol metabolism and inflammatory diseases.
Collapse
Affiliation(s)
- Felipe Jiménez-Aspee
- Department of Food Biofunctionality (140b), Institute of Nutritional Sciences, University of Hohenheim, Garbenstrasse 28, 70599, Stuttgart, Baden-Württemberg, Germany
| | - Jonas Pospiech
- Department of Food Biofunctionality (140b), Institute of Nutritional Sciences, University of Hohenheim, Garbenstrasse 28, 70599, Stuttgart, Baden-Württemberg, Germany
| | - Sarah Bauer
- Department of Immunology (180b), Institute of Nutritional Medicine, University of Hohenheim, Fruhwirthstrasse 12, 70599, Stuttgart, Germany
| | - Nadine Sus
- Department of Food Biofunctionality (140b), Institute of Nutritional Sciences, University of Hohenheim, Garbenstrasse 28, 70599, Stuttgart, Baden-Württemberg, Germany
| | - Thomas A Kufer
- Department of Immunology (180b), Institute of Nutritional Medicine, University of Hohenheim, Fruhwirthstrasse 12, 70599, Stuttgart, Germany
| | - Jan Frank
- Department of Food Biofunctionality (140b), Institute of Nutritional Sciences, University of Hohenheim, Garbenstrasse 28, 70599, Stuttgart, Baden-Württemberg, Germany
| |
Collapse
|
10
|
Mehto S, Jena KK, Yadav R, Priyadarsini S, Samal P, Krishna S, Dhar K, Jain A, Chauhan NR, Murmu KC, Bal R, Sahu R, Jaiswal P, Sahoo BS, Patnaik S, Kufer TA, Rusten TE, Chauhan S, Prasad P, Chauhan S. Selective autophagy of RIPosomes maintains innate immune homeostasis during bacterial infection. EMBO J 2022; 41:e111289. [PMID: 36221902 PMCID: PMC9713718 DOI: 10.15252/embj.2022111289] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 09/12/2022] [Accepted: 09/15/2022] [Indexed: 01/15/2023] Open
Abstract
The NOD1/2-RIPK2 is a key cytosolic signaling complex that activates NF-κB pro-inflammatory response against invading pathogens. However, uncontrolled NF-κB signaling can cause tissue damage leading to chronic diseases. The mechanisms by which the NODs-RIPK2-NF-κB innate immune axis is activated and resolved remain poorly understood. Here, we demonstrate that bacterial infection induces the formation of endogenous RIPK2 oligomers (RIPosomes) that are self-assembling entities that coat the bacteria to induce NF-κB response. Next, we show that autophagy proteins IRGM and p62/SQSTM1 physically interact with NOD1/2, RIPK2 and RIPosomes to promote their selective autophagy and limit NF-κB activation. IRGM suppresses RIPK2-dependent pro-inflammatory programs induced by Shigella and Salmonella. Consistently, the therapeutic inhibition of RIPK2 ameliorates Shigella infection- and DSS-induced gut inflammation in Irgm1 KO mice. This study identifies a unique mechanism where the innate immune proteins and autophagy machinery are recruited together to the bacteria for defense as well as for maintaining immune homeostasis.
Collapse
Affiliation(s)
- Subhash Mehto
- Cell Biology and Infectious Diseases Unit, Department of Infectious Disease BiologyInstitute of Life SciencesBhubaneswarIndia
| | - Kautilya Kumar Jena
- Cell Biology and Infectious Diseases Unit, Department of Infectious Disease BiologyInstitute of Life SciencesBhubaneswarIndia,Present address:
Division of Immunology, Boston Children's HospitalHarvard Medical SchoolBostonMAUSA
| | - Rina Yadav
- Cell Biology and Infectious Diseases Unit, Department of Infectious Disease BiologyInstitute of Life SciencesBhubaneswarIndia,Regional Centre for Biotechnology, NCR Biotech Science ClusterFaridabadIndia
| | | | - Pallavi Samal
- Cell Biology and Infectious Diseases Unit, Department of Infectious Disease BiologyInstitute of Life SciencesBhubaneswarIndia
| | - Sivaram Krishna
- Cell Biology and Infectious Diseases Unit, Department of Infectious Disease BiologyInstitute of Life SciencesBhubaneswarIndia,Regional Centre for Biotechnology, NCR Biotech Science ClusterFaridabadIndia
| | - Kollori Dhar
- Cell Biology and Infectious Diseases Unit, Department of Infectious Disease BiologyInstitute of Life SciencesBhubaneswarIndia,Regional Centre for Biotechnology, NCR Biotech Science ClusterFaridabadIndia
| | - Ashish Jain
- Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of MedicineUniversity of OsloOsloNorway,Department of Molecular Cell Biology, Institute for Cancer ResearchOslo University HospitalOsloNorway
| | - Nishant Ranjan Chauhan
- Cell Biology and Infectious Diseases Unit, Department of Infectious Disease BiologyInstitute of Life SciencesBhubaneswarIndia
| | - Krushna C Murmu
- Epigenetic and Chromatin Biology UnitInstitute of Life SciencesBhubaneswarIndia
| | - Ramyasingh Bal
- Cell Biology and Infectious Diseases Unit, Department of Infectious Disease BiologyInstitute of Life SciencesBhubaneswarIndia,School of BiotechnologyKIIT UniversityBhubaneswarIndia
| | - Rinku Sahu
- Cell Biology and Infectious Diseases Unit, Department of Infectious Disease BiologyInstitute of Life SciencesBhubaneswarIndia,Regional Centre for Biotechnology, NCR Biotech Science ClusterFaridabadIndia
| | - Pundrik Jaiswal
- Cell Biology and Infectious Diseases Unit, Department of Infectious Disease BiologyInstitute of Life SciencesBhubaneswarIndia
| | | | | | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional MedicineUniversity of HohenheimStuttgartGermany
| | - Tor Erik Rusten
- Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of MedicineUniversity of OsloOsloNorway,Department of Molecular Cell Biology, Institute for Cancer ResearchOslo University HospitalOsloNorway
| | - Swati Chauhan
- Epigenetic and Chromatin Biology UnitInstitute of Life SciencesBhubaneswarIndia
| | - Punit Prasad
- Epigenetic and Chromatin Biology UnitInstitute of Life SciencesBhubaneswarIndia
| | - Santosh Chauhan
- Cell Biology and Infectious Diseases Unit, Department of Infectious Disease BiologyInstitute of Life SciencesBhubaneswarIndia,CSIR–Centre For Cellular And Molecular Biology (CCMB)HyderabadIndia
| |
Collapse
|
11
|
Pant A, Yao X, Lavedrine A, Viret C, Dockterman J, Chauhan S, Chong-Shan Shi, Manjithaya R, Cadwell K, Kufer TA, Kehrl JH, Coers J, Sibley LD, Faure M, Taylor GA, Chauhan S. Interactions of Autophagy and the Immune System in Health and Diseases. Autophagy Rep 2022; 1:438-515. [PMID: 37425656 PMCID: PMC10327624 DOI: 10.1080/27694127.2022.2119743] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
Autophagy is a highly conserved process that utilizes lysosomes to selectively degrade a variety of intracellular cargo, thus providing quality control over cellular components and maintaining cellular regulatory functions. Autophagy is triggered by multiple stimuli ranging from nutrient starvation to microbial infection. Autophagy extensively shapes and modulates the inflammatory response, the concerted action of immune cells, and secreted mediators aimed to eradicate a microbial infection or to heal sterile tissue damage. Here, we first review how autophagy affects innate immune signaling, cell-autonomous immune defense, and adaptive immunity. Then, we discuss the role of non-canonical autophagy in microbial infections and inflammation. Finally, we review how crosstalk between autophagy and inflammation influences infectious, metabolic, and autoimmune disorders.
Collapse
Affiliation(s)
- Aarti Pant
- Autophagy Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
| | - Xiaomin Yao
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University Grossman School of Medicine, New York, New York, United States of America
- Department of Microbiology, New York University Grossman School of Medicine, New York, New York, United States of America
| | - Aude Lavedrine
- CIRI, Centre International de Recherche en Infectiologie, Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Equipe Labellisée par la Fondation pour la Recherche Médicale, FRM
| | - Christophe Viret
- CIRI, Centre International de Recherche en Infectiologie, Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Equipe Labellisée par la Fondation pour la Recherche Médicale, FRM
| | - Jake Dockterman
- Department of Immunology, Duke University, Medical Center, Durham, North Carolina, USA
| | - Swati Chauhan
- Cell biology and Infectious diseases, Institute of Life Sciences, Bhubaneswar, India
| | - Chong-Shan Shi
- Laboratory of Immunoregulation, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Ravi Manjithaya
- Autophagy Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
- Neuroscience Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
| | - Ken Cadwell
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University Grossman School of Medicine, New York, New York, United States of America
- Department of Microbiology, New York University Grossman School of Medicine, New York, New York, United States of America
- Division of Gastroenterology and Hepatology, Department of Medicine, New York University Grossman School of Medicine, New York, New York, United States of America
| | - Thomas A. Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - John H. Kehrl
- Laboratory of Immunoregulation, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Jörn Coers
- Department of Immunology, Duke University, Medical Center, Durham, North Carolina, USA
- Department of Molecular Genetics and Microbiology, Duke University, Medical Center, Durham, North Carolina, USA
| | - L. David Sibley
- Department of Molecular Microbiology, Washington University Sch. Med., St Louis, MO, 63110, USA
| | - Mathias Faure
- CIRI, Centre International de Recherche en Infectiologie, Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Equipe Labellisée par la Fondation pour la Recherche Médicale, FRM
| | - Gregory A Taylor
- Department of Immunology, Duke University, Medical Center, Durham, North Carolina, USA
- Department of Molecular Genetics and Microbiology, Duke University, Medical Center, Durham, North Carolina, USA
- Department of Molecular Microbiology, Washington University Sch. Med., St Louis, MO, 63110, USA
- Geriatric Research, Education, and Clinical Center, VA Health Care Center, Durham, North Carolina, USA
- Departments of Medicine, Division of Geriatrics, and Center for the Study of Aging and Human Development, Duke University, Medical Center, Durham, North Carolina, USA
| | - Santosh Chauhan
- Cell biology and Infectious diseases, Institute of Life Sciences, Bhubaneswar, India
- CSIR–Centre For Cellular And Molecular Biology (CCMB), Hyderabad, Telangana
| |
Collapse
|
12
|
Kienes I, Johnston EL, Bitto NJ, Kaparakis-Liaskos M, Kufer TA. Bacterial subversion of NLR-mediated immune responses. Front Immunol 2022; 13:930882. [PMID: 35967403 PMCID: PMC9367220 DOI: 10.3389/fimmu.2022.930882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 07/04/2022] [Indexed: 11/23/2022] Open
Abstract
Members of the mammalian Nod-like receptor (NLR) protein family are important intracellular sensors for bacteria. Bacteria have evolved under the pressure of detection by host immune sensing systems, leading to adaptive subversion strategies to dampen immune responses for their benefits. These include modification of microbe-associated molecular patterns (MAMPs), interception of innate immune pathways by secreted effector proteins and sophisticated instruction of anti-inflammatory adaptive immune responses. Here, we summarise our current understanding of subversion strategies used by bacterial pathogens to manipulate NLR-mediated responses, focusing on the well-studied members NOD1/2, and the inflammasome forming NLRs NLRC4, and NLRP3. We discuss how bacterial pathogens and their products activate these NLRs to promote inflammation and disease and the range of mechanisms used by bacterial pathogens to evade detection by NLRs and to block or dampen NLR activation to ultimately interfere with the generation of host immunity. Moreover, we discuss how bacteria utilise NLRs to facilitate immunotolerance and persistence in the host and outline how various mechanisms used to attenuate innate immune responses towards bacterial pathogens can also aid the host by reducing immunopathologies. Finally, we describe the therapeutic potential of harnessing immune subversion strategies used by bacteria to treat chronic inflammatory conditions.
Collapse
Affiliation(s)
- Ioannis Kienes
- Department of Immunology, University of Hohenheim, Stuttgart, Germany
| | - Ella L. Johnston
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Melbourne, VIC, Australia
- Research Centre for Extracellular Vesicles, La Trobe University, Melbourne, VIC, Australia
| | - Natalie J. Bitto
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Melbourne, VIC, Australia
- Research Centre for Extracellular Vesicles, La Trobe University, Melbourne, VIC, Australia
| | - Maria Kaparakis-Liaskos
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Melbourne, VIC, Australia
- Research Centre for Extracellular Vesicles, La Trobe University, Melbourne, VIC, Australia
| | - Thomas A. Kufer
- Department of Immunology, University of Hohenheim, Stuttgart, Germany
- *Correspondence: Thomas A. Kufer,
| |
Collapse
|
13
|
Arnold C, Ellwanger K, Kufer TA. Analysis of the Localization of NLRs upon Shigella flexneri Infection Exemplified by NOD1. Methods Mol Biol 2022; 2421:37-56. [PMID: 34870810 DOI: 10.1007/978-1-0716-1944-5_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
NOD-like receptors (NLRs) are a family of pattern recognition receptors, able to respond to conserved microbial structures and endogenous danger signals. The NLR NOD1 responds to bacterial peptidoglycan, leading to recruitment of RIPK2, following activation of NFκB and MAPK pathways. In this chapter, we describe a fluorescent light microscopic approach to analyze the subcellular distribution of NOD1 upon infection with the invasive, Gram-negative bacterial pathogen Shigella flexneri. This method is based on exogenously expressed EGFP-tagged NOD1 and describes a protocol to obtain inducible cell lines with functional NOD1 signaling. The described protocol is useful to study NOD1 function, also in living cells, using live cell imaging and can be adopted for the study of other NLR proteins.
Collapse
Affiliation(s)
- Christine Arnold
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Kornelia Ellwanger
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany.
| |
Collapse
|
14
|
Kufer TA, Kaparakis-Liaskos M. A Brief Introduction to Effector-Triggered Immunity. Methods Mol Biol 2022; 2523:1-8. [PMID: 35759187 DOI: 10.1007/978-1-0716-2449-4_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Detection of microbes by the host is essential to restrict microbial colonization, to clear pathogens, and to mount adapted defense reactions, and thus is the key function of the innate immune systems of plants and mammals. Here we provide an introduction into pathogen recognition by the innate immune system of both plants and animals. We will particularly focus on the concept of effector-triggered immunity, and similarities and differences in its function between plants and animals.
Collapse
Affiliation(s)
- Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany.
| | - Maria Kaparakis-Liaskos
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, Australia
- Research Centre for Extracellular Vesicles, School of Molecular Sciences, La Trobe University, Melbourne, VIC, Australia
| |
Collapse
|
15
|
Steinle H, Ellwanger K, Kufer TA. Assaying RIPK2 Activation by Complex Formation. Methods Mol Biol 2022; 2523:133-150. [PMID: 35759195 DOI: 10.1007/978-1-0716-2449-4_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The receptor-interacting serine/threonine-protein kinase-2 (RIPK2, RIP2) is a key player in downstream signaling of nuclear oligomerization domain (NOD)-like receptor (NLR)-mediated innate immune response against bacterial infections. RIPK2 is recruited following activation of the pattern recognition receptors (PRRs) NOD1 and NOD2 by sensing bacterial peptidoglycans leading to activation of NF-κB and MAPK pathways and the production of pro-inflammatory cytokines. Upon NOD1/2 activation, RIPK2 forms complexes in the cytoplasm of human cells, also called RIPosomes. These can be induced by Shigella flexneri or by the inhibition of RIPK2 by small compounds, such as GSK583 and gefitinib.In this chapter, we describe fluorescent light microscopic and Western blot approaches to analyze the cytoplasmic aggregation of RIPK2 upon infection with the invasive, Gram-negative bacterial pathogen Shigella flexneri, or by the treatment with RIPK2 inhibitors. This method is based on HeLa cells stably expressing eGFP-tagged RIPK2 and describes a protocol to induce and visualize RIPosome formation. The described method is useful to study the deposition of RIPK2 in speck-like structures, also in living cells, using live cell imaging and can be adopted for the study of other inhibitory proteins or to further analyze the process of RIPosome structure assembly.
Collapse
Affiliation(s)
- Heidrun Steinle
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Baden-Württemberg, Germany
| | - Kornelia Ellwanger
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Baden-Württemberg, Germany
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Baden-Württemberg, Germany.
| |
Collapse
|
16
|
Quenum AJI, Shukla A, Rexhepi F, Cloutier M, Ghosh A, Kufer TA, Ramanathan S, Ilangumaran S. NLRC5 Deficiency Deregulates Hepatic Inflammatory Response but Does Not Aggravate Carbon Tetrachloride-Induced Liver Fibrosis. Front Immunol 2021; 12:749646. [PMID: 34712238 PMCID: PMC8546206 DOI: 10.3389/fimmu.2021.749646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 09/27/2021] [Indexed: 12/12/2022] Open
Abstract
The nucleotide-binding leucine-rich repeat-containing receptor (NLR) family protein-5 (NLRC5) controls NF-κB activation and production of inflammatory cytokines in certain cell types. NLRC5 is considered a potential regulator of hepatic fibrogenic response due to its ability to inhibit hepatic stellate activation in vitro. To test whether NLRC5 is critical to control liver fibrosis, we treated wildtype and NLRC5-deficient mice with carbon tetrachloride (CCl4) and assessed pathological changes in the liver. Serum alanine transaminase levels and histopathology examination of liver sections revealed that NLRC5 deficiency did not exacerbate CCl4-induced liver damage or inflammatory cell infiltration. Sirius red staining of collagen fibers and hydroxyproline content showed comparable levels of liver fibrosis in CCl4-treated NLRC5-deficient and control mice. Myofibroblast differentiation and induction of collagen genes were similarly increased in both groups. Strikingly, the fibrotic livers of NLRC5-deficient mice showed reduced expression of matrix metalloproteinase-3 (Mmp3) and tissue inhibitor of MMPs-1 (Timp1) but not Mmp2 or Timp2. Fibrotic livers of NLRC5-deficient mice had increased expression of TNF but similar induction of TGFβ compared to wildtype mice. CCl4-treated control and NLRC5-deficient mice displayed similar upregulation of Cx3cr1, a monocyte chemoattractant receptor gene, and the Cd68 macrophage marker. However, the fibrotic livers of NLRC5-deficient mice showed increased expression of F4/80 (Adgre1), a marker of tissue-resident macrophages. NLRC5-deficient livers showed increased phosphorylation of the NF-κB subunit p65 that remained elevated following fibrosis induction. Taken together, NLRC5 deficiency deregulates hepatic inflammatory response following chemical injury but does not significantly aggravate the fibrogenic response, showing that NLRC5 is not a critical regulator of liver fibrosis pathogenesis.
Collapse
Affiliation(s)
- Akouavi Julite I. Quenum
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
| | - Akhil Shukla
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
| | - Fjolla Rexhepi
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
| | - Maryse Cloutier
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
| | - Amit Ghosh
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
| | - Thomas A. Kufer
- Department of Immunology (180b), Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Sheela Ramanathan
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke (CR-CHUS), Sherbrooke, Canada
| | - Subburaj Ilangumaran
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke (CR-CHUS), Sherbrooke, Canada
| |
Collapse
|
17
|
Steinle H, Ellwanger K, Mirza N, Briese S, Kienes I, Pfannstiel J, Kufer TA. 14-3-3 and erlin proteins differentially interact with RIPK2 complexes. J Cell Sci 2021; 134:jcs258137. [PMID: 34152391 DOI: 10.1242/jcs.258137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 05/19/2021] [Indexed: 01/11/2023] Open
Abstract
The receptor interacting serine/threonine kinase 2 (RIPK2) is essential for signal transduction induced by the pattern recognition receptors NOD1 and NOD2 (referred to collectively as NOD1/2). Upon NOD1/2 activation, RIPK2 forms complexes in the cytoplasm of human cells. Here, we identified the molecular composition of these complexes. Infection with Shigella flexneri to activate NOD1-RIPK2 revealed that RIPK2 formed dynamic interactions with several cellular proteins, including A20 (also known as TNFAIP3), erlin-1, erlin-2 and 14-3-3. Whereas interaction of RIPK2 with 14-3-3 proteins was strongly reduced upon infection with Shigella, erlin-1 and erlin-2 (erlin-1/2) specifically bound to RIPK2 complexes. The interaction of these proteins with RIPK2 was validated using protein binding assays and immunofluorescence staining. Beside bacterial activation of NOD1/2, depletion of the E3 ubiquitin ligase XIAP and treatment with RIPK2 inhibitors also led to the formation of RIPK2 cytosolic complexes. Although erlin-1/2 were recruited to RIPK2 complexes following XIAP inhibition, these proteins did not associate with RIPK2 structures induced by RIPK2 inhibitors. While the specific recruitment of erlin-1/2 to RIPK2 suggests a role in innate immune signaling, the biological response regulated by the erlin-1/2-RIPK2 association remains to be determined.
Collapse
Affiliation(s)
- Heidrun Steinle
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70619 Stuttgart, Germany
| | - Kornelia Ellwanger
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70619 Stuttgart, Germany
| | - Nora Mirza
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70619 Stuttgart, Germany
| | - Selina Briese
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70619 Stuttgart, Germany
| | - Ioannis Kienes
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70619 Stuttgart, Germany
| | - Jens Pfannstiel
- Core Facility Hohenheim Mass Spectrometry Module, Institute of Nutritional Medicine, University of Hohenheim, 70619 Stuttgart, Germany
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70619 Stuttgart, Germany
| |
Collapse
|
18
|
Kienes I, Bauer S, Gottschild C, Mirza N, Pfannstiel J, Schröder M, Kufer TA. DDX3X Links NLRP11 to the Regulation of Type I Interferon Responses and NLRP3 Inflammasome Activation. Front Immunol 2021; 12:653883. [PMID: 34054816 PMCID: PMC8158815 DOI: 10.3389/fimmu.2021.653883] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 04/19/2021] [Indexed: 12/12/2022] Open
Abstract
Tight regulation of inflammatory cytokine and interferon (IFN) production in innate immunity is pivotal for optimal control of pathogens and avoidance of immunopathology. The human Nod-like receptor (NLR) NLRP11 has been shown to regulate type I IFN and pro-inflammatory cytokine responses. Here, we identified the ATP-dependent RNA helicase DDX3X as a novel binding partner of NLRP11, using co-immunoprecipitation and LC-MS/MS. DDX3X is known to enhance type I IFN responses and NLRP3 inflammasome activation. We demonstrate that NLRP11 can abolish IKKϵ-mediated phosphorylation of DDX3X, resulting in lower type I IFN induction upon viral infection. These effects were dependent on the LRR domain of NLRP11 that we mapped as the interaction domain for DDX3X. In addition, NLRP11 also suppressed NLRP3-mediated caspase-1 activation in an LRR domain-dependent manner, suggesting that NLRP11 might sequester DDX3X and prevent it from promoting NLRP3-induced inflammasome activation. Taken together, our data revealed DDX3X as a central target of NLRP11, which can mediate the effects of NLRP11 on type I IFN induction as well as NLRP3 inflammasome activation. This expands our knowledge of the molecular mechanisms underlying NLRP11 function in innate immunity and suggests that both NLRP11 and DDX3X might be promising targets for modulation of innate immune responses.
Collapse
Affiliation(s)
- Ioannis Kienes
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Sarah Bauer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Clarissa Gottschild
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Nora Mirza
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Jens Pfannstiel
- Core Facility University of Hohenheim, Mass Spectrometry Module, University of Hohenheim, Stuttgart, Germany
| | - Martina Schröder
- Kathleen Lonsdale Institute for Human Health Research, Department of Biology, Maynooth University, Maynooth, Ireland
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| |
Collapse
|
19
|
Pei G, Zyla J, He L, Moura-Alves P, Steinle H, Saikali P, Lozza L, Nieuwenhuizen N, Weiner J, Mollenkopf HJ, Ellwanger K, Arnold C, Duan M, Dagil Y, Pashenkov M, Boneca IG, Kufer TA, Dorhoi A, Kaufmann SH. Cellular stress promotes NOD1/2-dependent inflammation via the endogenous metabolite sphingosine-1-phosphate. EMBO J 2021; 40:e106272. [PMID: 33942347 PMCID: PMC8246065 DOI: 10.15252/embj.2020106272] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 03/25/2021] [Accepted: 03/29/2021] [Indexed: 12/13/2022] Open
Abstract
Cellular stress has been associated with inflammation, yet precise underlying mechanisms remain elusive. In this study, various unrelated stress inducers were employed to screen for sensors linking altered cellular homeostasis and inflammation. We identified the intracellular pattern recognition receptors NOD1/2, which sense bacterial peptidoglycans, as general stress sensors detecting perturbations of cellular homeostasis. NOD1/2 activation upon such perturbations required generation of the endogenous metabolite sphingosine‐1‐phosphate (S1P). Unlike peptidoglycan sensing via the leucine‐rich repeats domain, cytosolic S1P directly bound to the nucleotide binding domains of NOD1/2, triggering NF‐κB activation and inflammatory responses. In sum, we unveiled a hitherto unknown role of NOD1/2 in surveillance of cellular homeostasis through sensing of the cytosolic metabolite S1P. We propose S1P, an endogenous metabolite, as a novel NOD1/2 activator and NOD1/2 as molecular hubs integrating bacterial and metabolic cues.
Collapse
Affiliation(s)
- Gang Pei
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Joanna Zyla
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany.,Department of Data Science and Engineering, Silesian University of Technology, Gliwice, Poland
| | - Lichun He
- State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, Key Laboratory of Magnetic Resonance in Biological Systems, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Pedro Moura-Alves
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany.,Nuffield Department of Medicine, Ludwig Institute for Cancer Research, University of Oxford, Oxford, UK
| | - Heidrun Steinle
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Philippe Saikali
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Laura Lozza
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Natalie Nieuwenhuizen
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - January Weiner
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | | | - Kornelia Ellwanger
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Christine Arnold
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Mojie Duan
- State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, Key Laboratory of Magnetic Resonance in Biological Systems, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yulia Dagil
- Institute of Immunology of the Federal Medical-Biological Agency of Russia, Moscow, Russia
| | - Mikhail Pashenkov
- Institute of Immunology of the Federal Medical-Biological Agency of Russia, Moscow, Russia
| | - Ivo Gomperts Boneca
- Institut Pasteur, Department of Microbiology, Biology and Genetics of the Bacterial Cell Wall, Paris, France.,CNRS UMR2001, Integrative and Molecular Microbiology, Paris, France.,INSERM, Équipe AVENIR, Paris, France
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Anca Dorhoi
- Institute of Immunology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany.,Faculty of Mathematics and Natural Sciences, University of Greifswald, Greifswald, Germany
| | - Stefan He Kaufmann
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany.,Hagler Institute for Advanced Study at Texas A&M University, College Station, TX, USA
| |
Collapse
|
20
|
Johnston EL, Heras B, Kufer TA, Kaparakis-Liaskos M. Detection of Bacterial Membrane Vesicles by NOD-Like Receptors. Int J Mol Sci 2021; 22:ijms22031005. [PMID: 33498269 PMCID: PMC7863931 DOI: 10.3390/ijms22031005] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/15/2021] [Accepted: 01/15/2021] [Indexed: 01/18/2023] Open
Abstract
Bacterial membrane vesicles (BMVs) are nanoparticles produced by both Gram-negative and Gram-positive bacteria that can function to modulate immunity in the host. Both outer membrane vesicles (OMVs) and membrane vesicles (MVs), which are released by Gram-negative and Gram-positive bacteria, respectively, contain cargo derived from their parent bacterium, including immune stimulating molecules such as proteins, lipids and nucleic acids. Of these, peptidoglycan (PG) and lipopolysaccharide (LPS) are able to activate host innate immune pattern recognition receptors (PRRs), known as NOD-like receptors (NLRs), such as nucleotide-binding oligomerisation domain-containing protein (NOD) 1, NOD2 and NLRP3. NLR activation is a key driver of inflammation in the host, and BMVs derived from both pathogenic and commensal bacteria have been shown to package PG and LPS in order to modulate the host immune response using NLR-dependent mechanisms. Here, we discuss the packaging of immunostimulatory cargo within OMVs and MVs, their detection by NLRs and the cytokines produced by host cells in response to their detection. Additionally, commensal derived BMVs are thought to shape immunity and contribute to homeostasis in the gut, therefore we also highlight the interactions of commensal derived BMVs with NLRs and their roles in limiting inflammatory diseases.
Collapse
Affiliation(s)
- Ella L Johnston
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora 3086, Australia
- Research Centre for Extracellular Vesicles, School of Molecular Sciences, La Trobe University, Bundoora 3086, Australia
| | - Begoña Heras
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Sciences, La Trobe University, Bundoora 3086, Australia
| | - Thomas A Kufer
- Department of Immunology, Institute for Nutritional Medicine, University of Hohenheim, 70593 Stuttgart, Germany
| | - Maria Kaparakis-Liaskos
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora 3086, Australia
- Research Centre for Extracellular Vesicles, School of Molecular Sciences, La Trobe University, Bundoora 3086, Australia
| |
Collapse
|
21
|
Such L, Zhao F, Liu D, Thier B, Le-Trilling VTK, Sucker A, Coch C, Pieper N, Howe S, Bhat H, Kalkavan H, Ritter C, Brinkhaus R, Ugurel S, Köster J, Seifert U, Dittmer U, Schuler M, Lang KS, Kufer TA, Hartmann G, Becker JC, Horn S, Ferrone S, Liu D, Van Allen EM, Schadendorf D, Griewank K, Trilling M, Paschen A. Targeting the innate immunoreceptor RIG-I overcomes melanoma-intrinsic resistance to T cell immunotherapy. J Clin Invest 2020; 130:4266-4281. [PMID: 32427578 PMCID: PMC7410049 DOI: 10.1172/jci131572] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 05/07/2020] [Indexed: 12/20/2022] Open
Abstract
Understanding tumor resistance to T cell immunotherapies is critical to improve patient outcomes. Our study revealed a role for transcriptional suppression of the tumor-intrinsic HLA class I (HLA-I) antigen processing and presentation machinery (APM) in therapy resistance. Low HLA-I APM mRNA levels in melanoma metastases before immune checkpoint blockade (ICB) correlated with nonresponsiveness to therapy and poor clinical outcome. Patient-derived melanoma cells with silenced HLA-I APM escaped recognition by autologous CD8+ T cells. However, targeted activation of the innate immunoreceptor RIG-I initiated de novo HLA-I APM transcription, thereby overcoming T cell resistance. Antigen presentation was restored in interferon-sensitive (IFN-sensitive) but also immunoedited IFN-resistant melanoma models through RIG-I-dependent stimulation of an IFN-independent salvage pathway involving IRF1 and IRF3. Likewise, enhanced HLA-I APM expression was detected in RIG-Ihi (DDX58hi) melanoma biopsies, correlating with improved patient survival. Induction of HLA-I APM by RIG-I synergized with antibodies blocking PD-1 and TIGIT inhibitory checkpoints in boosting the antitumor T cell activity of ICB nonresponders. Overall, the herein-identified IFN-independent effect of RIG-I on tumor antigen presentation and T cell recognition proposes innate immunoreceptor targeting as a strategy to overcome intrinsic T cell resistance of IFN-sensitive and IFN-resistant melanomas and improve clinical outcomes in immunotherapy.
Collapse
Affiliation(s)
- Lina Such
- Department of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
| | - Fang Zhao
- Department of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
| | - Derek Liu
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Beatrice Thier
- Department of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
| | | | - Antje Sucker
- Department of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
| | - Christoph Coch
- Institute of Clinical Chemistry and Clinical Pharmacology, University of Bonn, Bonn, Germany
| | - Natalia Pieper
- Department of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
| | - Sebastian Howe
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | | | - Halime Kalkavan
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
- Institute of Immunology, and
- Department of Medical Oncology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- Department of Immunology, St Jude Children’s Research Hospital, Memphis, Tennessee, USA
| | - Cathrin Ritter
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
- Department of Translational Skin Cancer Research, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Robin Brinkhaus
- Department of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
| | - Selma Ugurel
- Department of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
| | - Johannes Köster
- Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Ulrike Seifert
- Friedrich Loeffler Institute for Medical Microbiology, University Medicine Greifswald, Greifswald, Germany
| | - Ulf Dittmer
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Martin Schuler
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
- Department of Medical Oncology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- West German Cancer Center, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | | | - Thomas A. Kufer
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, Stuttgart, Germany
| | - Gunther Hartmann
- Institute of Clinical Chemistry and Clinical Pharmacology, University of Bonn, Bonn, Germany
| | - Jürgen C. Becker
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
- Department of Translational Skin Cancer Research, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Susanne Horn
- Department of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
- Rudolf Schönheimer Institute of Biochemistry, University of Leipzig, Leipzig, Germany
| | - Soldano Ferrone
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - David Liu
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Eliezer M. Van Allen
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Dirk Schadendorf
- Department of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
- West German Cancer Center, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Klaus Griewank
- Department of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
| | - Mirko Trilling
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Annette Paschen
- Department of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- German Cancer Consortium (DKTK), University Hospital Essen, Essen, Germany
| |
Collapse
|
22
|
Chonwerawong M, Ferrand J, Chaudhry HM, Higgins C, Tran LS, Lim SS, Walker MM, Bhathal PS, Dev A, Moore GT, Sievert W, Jenkins BJ, D'Elios MM, Philpott DJ, Kufer TA, Ferrero RL. Innate Immune Molecule NLRC5 Protects Mice From Helicobacter-induced Formation of Gastric Lymphoid Tissue. Gastroenterology 2020; 159:169-182.e8. [PMID: 32169428 DOI: 10.1053/j.gastro.2020.03.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 02/05/2020] [Accepted: 03/03/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND & AIMS Helicobacter pylori induces strong inflammatory responses that are directed at clearing the infection, but if not controlled, these responses can be harmful to the host. We investigated the immune-regulatory effects of the innate immune molecule, nucleotide-binding oligomerization domain-like receptors (NLR) family CARD domain-containing 5 (NLRC5), in patients and mice with Helicobacter infection. METHODS We obtained gastric biopsies from 30 patients in Australia. We performed studies with mice that lack NLRC5 in the myeloid linage (Nlrc5møKO) and mice without Nlrc5 gene disruption (controls). Some mice were gavaged with H pylori SS1 or Helicobacter felis; 3 months later, stomachs, spleens, and sera were collected, along with macrophages derived from bone marrow. Human and mouse gastric tissues and mouse macrophages were analyzed by histology, immunohistochemistry, immunoblots, and quantitative polymerase chain reaction. THP-1 cells (human macrophages, controls) and NLRC5-/- THP-1 cells (generated by CRISPR-Cas9 gene editing) were incubated with Helicobacter and gene expression and production of cytokines were analyzed. RESULTS Levels of NLRC5 messenger RNA were significantly increased in gastric tissues from patients with H pylori infection, compared with patients without infection (P < .01), and correlated with gastritis severity (P < .05). H pylori bacteria induced significantly higher levels of chemokine and cytokine production by NLRC5-/- THP-1 macrophages than by control THP-1 cells (P < .05). After 3 months of infection with H felis, Nlrc5mø-KO mice developed gastric hyperplasia (P < .0001), splenomegaly (P < .0001), and increased serum antibody titers (P < .01), whereas control mice did not. Nlrc5mø-KO mice with chronic H felis infection had increased numbers of gastric B-cell follicles expressing CD19 (P < .0001); these follicles had features of mucosa-associated lymphoid tissue lymphoma. We identified B-cell-activating factor as a protein that promoted B-cell hyperproliferation in Nlrc5mø-KO mice. CONCLUSIONS NLRC5 is a negative regulator of gastric inflammation and mucosal lymphoid formation in response to Helicobacter infection. Aberrant NLRC5 signaling in macrophages can promote B-cell lymphomagenesis during chronic Helicobacter infection.
Collapse
Affiliation(s)
- Michelle Chonwerawong
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Victoria, Australia; Department of Molecular and Translational Science, Monash University, Victoria, Australia
| | - Jonathan Ferrand
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Victoria, Australia
| | - Hassan Mohammad Chaudhry
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Victoria, Australia
| | - Chloe Higgins
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Victoria, Australia
| | - Le Son Tran
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Victoria, Australia
| | - San Sui Lim
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Victoria, Australia
| | - Marjorie M Walker
- School of Medicine and Public Health, Faculty of Health and Medicine, The University of Newcastle, New South Wales, Australia; Department of Pathology, University of Melbourne, Victoria, Australia
| | - Prithi S Bhathal
- Department of Pathology, University of Melbourne, Victoria, Australia
| | - Anouk Dev
- Department of Medicine, Monash University, Monash Medical Centre, Victoria, Australia
| | - Gregory T Moore
- Department of Medicine, Monash University, Monash Medical Centre, Victoria, Australia
| | - William Sievert
- Department of Medicine, Monash University, Monash Medical Centre, Victoria, Australia; Dipartimento di Medicina Sperimentale e Clinica, University of Florence, Florence, Italy
| | - Brendan J Jenkins
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Victoria, Australia; Department of Molecular and Translational Science, Monash University, Victoria, Australia
| | - Mario M D'Elios
- Dipartimento di Medicina Sperimentale e Clinica, University of Florence, Florence, Italy
| | - Dana J Philpott
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Thomas A Kufer
- University of Hohenheim, Institute of Nutritional Medicine, Department of Immunology, Stuttgart, Germany
| | - Richard L Ferrero
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Victoria, Australia; Department of Molecular and Translational Science, Monash University, Victoria, Australia; Biomedicine Discovery Institute, Department of Microbiology, Monash University, Victoria, Australia.
| |
Collapse
|
23
|
Kufer TA, Creagh EM, Bryant CE. Guardians of the Cell: Effector-Triggered Immunity Steers Mammalian Immune Defense. Trends Immunol 2019; 40:939-951. [PMID: 31500957 DOI: 10.1016/j.it.2019.08.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 07/31/2019] [Accepted: 08/08/2019] [Indexed: 12/14/2022]
Abstract
The mammalian innate immune system deals with invading pathogens and stress by activating pattern-recognition receptors (PRRs) in the host. Initially proposed to be triggered by the discrimination of defined molecular signatures from pathogens rather than from self, it is now clear that PRRs can also be activated by endogenous ligands, bacterial metabolites and, following pathogen-induced alterations of cellular processes, changes in the F-actin cytoskeleton. These processes are collectively referred to as effector-triggered immunity (ETI). Here, we summarize the molecular and conceptual advances in our understanding of cell autonomous innate immune responses against bacterial pathogens, and discuss how classical activation of PRRs and ETI interplay to drive inflammatory responses.
Collapse
Affiliation(s)
- Thomas A Kufer
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, Stuttgart, Germany.
| | - Emma M Creagh
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.
| | - Clare E Bryant
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK.
| |
Collapse
|
24
|
Ellwanger K, Briese S, Arnold C, Kienes I, Heim V, Nachbur U, Kufer TA. XIAP controls RIPK2 signaling by preventing its deposition in speck-like structures. Life Sci Alliance 2019; 2:2/4/e201900346. [PMID: 31350258 PMCID: PMC6660644 DOI: 10.26508/lsa.201900346] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 07/15/2019] [Accepted: 07/16/2019] [Indexed: 11/24/2022] Open
Abstract
This study provides evidence that the NOD1/2-associated kinase RIPK2 localizes to detergent insoluble cytosolic complexes upon activation and suggests novel regulatory mechanisms for RIPK2 signaling. The receptor interacting serine/threonine kinase 2 (RIPK2) is essential for linking activation of the pattern recognition receptors NOD1 and NOD2 to cellular signaling events. Recently, it was shown that RIPK2 can form higher order molecular structures in vitro. Here, we demonstrate that RIPK2 forms detergent insoluble complexes in the cytosol of host cells upon infection with invasive enteropathogenic bacteria. Formation of these structures occurred after NF-κB activation and depended on the caspase activation and recruitment domain of NOD1 or NOD2. Complex formation upon activation required RIPK2 autophosphorylation at Y474 and was influenced by phosphorylation at S176. We found that the E3 ligase X-linked inhibitor of apoptosis (XIAP) counteracts complex formation of RIPK2, accordingly mutation of the XIAP ubiquitylation sites in RIPK2 enhanced complex formation. Taken together, our work reveals novel roles of XIAP in the regulation of RIPK2 and expands our knowledge on the function of RIPK2 posttranslational modifications in NOD1/2 signaling.
Collapse
Affiliation(s)
- Kornelia Ellwanger
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Selina Briese
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Christine Arnold
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Ioannis Kienes
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Valentin Heim
- Walter and Eliza Hall Institute of Medical Research, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Ueli Nachbur
- Walter and Eliza Hall Institute of Medical Research, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| |
Collapse
|
25
|
Robinson N, Ganesan R, Hegedűs C, Kovács K, Kufer TA, Virág L. Programmed necrotic cell death of macrophages: Focus on pyroptosis, necroptosis, and parthanatos. Redox Biol 2019; 26:101239. [PMID: 31212216 PMCID: PMC6582207 DOI: 10.1016/j.redox.2019.101239] [Citation(s) in RCA: 191] [Impact Index Per Article: 38.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/27/2019] [Accepted: 06/03/2019] [Indexed: 12/12/2022] Open
Abstract
Macrophages are highly plastic cells of the innate immune system. Macrophages play central roles in immunity against microbes and contribute to a wide array of pathologies. The processes of macrophage activation and their functions have attracted considerable attention from life scientists. Although macrophages are highly resistant to many toxic stimuli, including oxidative stress, macrophage death has been reported in certain diseases, such as viral infections, tuberculosis, atherosclerotic plaque development, inflammation, and sepsis. While most studies on macrophage death focused on apoptosis, a significant body of data indicates that programmed necrotic cell death forms may be equally important modes of macrophage death. Three such regulated necrotic cell death modalities in macrophages contribute to different pathologies, including necroptosis, pyroptosis, and parthanatos. Various reactive oxygen and nitrogen species, such as superoxide, hydrogen peroxide, and peroxynitrite have been shown to act as triggers, mediators, or modulators in regulated necrotic cell death pathways. Here we discuss recent advances in necroptosis, pyroptosis, and parthanatos, with a strong focus on the role of redox homeostasis in the regulation of these events.
Collapse
Affiliation(s)
- Nirmal Robinson
- Inflammation and Human Ailments Laboratory, Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, Australia.
| | - Raja Ganesan
- Inflammation and Human Ailments Laboratory, Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, Australia
| | - Csaba Hegedűs
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Katalin Kovács
- MTA-DE Cell Biology and Signaling Research Group, Debrecen, Hungary
| | - Thomas A Kufer
- University of Hohenheim, Institute of Nutritional Medicine, Department of Immunology, Stuttgart, Germany.
| | - László Virág
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; MTA-DE Cell Biology and Signaling Research Group, Debrecen, Hungary.
| |
Collapse
|
26
|
Normand S, Waldschmitt N, Neerincx A, Martinez-Torres RJ, Chauvin C, Couturier-Maillard A, Boulard O, Cobret L, Awad F, Huot L, Ribeiro-Ribeiro A, Lautz K, Ruez R, Delacre M, Bondu C, Guilliams M, Scott C, Segal A, Amselem S, Hot D, Karabina S, Bohn E, Ryffel B, Poulin LF, Kufer TA, Chamaillard M. Proteasomal degradation of NOD2 by NLRP12 in monocytes promotes bacterial tolerance and colonization by enteropathogens. Nat Commun 2018; 9:5338. [PMID: 30559449 PMCID: PMC6297353 DOI: 10.1038/s41467-018-07750-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 11/21/2018] [Indexed: 12/29/2022] Open
Abstract
Mutations in the nucleotide-binding oligomerization domain protein 12 (NLRP12) cause recurrent episodes of serosal inflammation. Here we show that NLRP12 efficiently sequesters HSP90 and promotes K48-linked ubiquitination and degradation of NOD2 in response to bacterial muramyl dipeptide (MDP). This interaction is mediated by the linker-region proximal to the nucleotide-binding domain of NLRP12. Consequently, the disease-causing NLRP12 R284X mutation fails to repress MDP-induced NF-κB and subsequent activity of the JAK/STAT signaling pathway. While NLRP12 deficiency renders septic mice highly susceptible towards MDP, a sustained sensing of MDP through NOD2 is observed among monocytes lacking NLRP12. This loss of tolerance in monocytes results in greater colonization resistance towards Citrobacter rodentium. Our data show that this is a consequence of NOD2-dependent accumulation of inflammatory mononuclear cells that correlates with induction of interferon-stimulated genes. Our study unveils a relevant process of tolerance towards the gut microbiota that is exploited by an attaching/effacing enteric pathogen. Mutations in nucleotide-binding oligomerization domain protein 12 (NLRP12) are known to effect inflammatory processes. Here the authors show that NLRP12-mediated proteasomal degradation of NOD2 in monocytes promotes bacterial tolerance and colonisation in a model of enteric infection.
Collapse
Affiliation(s)
- Sylvain Normand
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France
| | - Nadine Waldschmitt
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France.,Technische Universität München, Chair of Nutrition and Immunology, 85350, Freising-Weihenstephan, Germany
| | - Andreas Neerincx
- Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QP, UK
| | | | - Camille Chauvin
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France
| | - Aurélie Couturier-Maillard
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France
| | - Olivier Boulard
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France
| | - Laetitia Cobret
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S 933, F-75012, Paris, France.,Inserm, UMR_S 933, F-75012, Paris, France
| | - Fawaz Awad
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S 933, F-75012, Paris, France.,Inserm, UMR_S 933, F-75012, Paris, France
| | - Ludovic Huot
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France
| | | | - Katja Lautz
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
| | - Richard Ruez
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France
| | - Myriam Delacre
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France
| | - Clovis Bondu
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France
| | - Martin Guilliams
- Laboratory of Immunoregulation, VIB Inflammation Research Center, 9052, Ghent, Belgium.,Department of Internal Medicine, Ghent University, Ghent, 9000, Belgium
| | - Charlotte Scott
- Laboratory of Immunoregulation, VIB Inflammation Research Center, 9052, Ghent, Belgium.,Department of Internal Medicine, Ghent University, Ghent, 9000, Belgium
| | - Anthony Segal
- Division of Medicine, University College London, WC1E 6BT, London, UK
| | - Serge Amselem
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S 933, F-75012, Paris, France.,Inserm, UMR_S 933, F-75012, Paris, France
| | - David Hot
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France
| | - Sonia Karabina
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S 933, F-75012, Paris, France.,Inserm, UMR_S 933, F-75012, Paris, France
| | - Erwin Bohn
- Interfakultaeres Institut für Mikrobiologie und Infektionsmedizin, Eberhard Karl Universitat Tuebingen, 72076, Tuebingen, Germany
| | - Bernhard Ryffel
- CNRS, Orléans University, INEM, UMR 7355, F-45071, Orléans, France
| | - Lionel F Poulin
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Mathias Chamaillard
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 8204 - CIIL - Centre d'Infection et d'Immunité de Lille, F-59000, Lille, France.
| |
Collapse
|
27
|
Mirza N, Sowa AS, Lautz K, Kufer TA. NLRP10 Affects the Stability of Abin-1 To Control Inflammatory Responses. J Immunol 2018; 202:218-227. [PMID: 30510071 DOI: 10.4049/jimmunol.1800334] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 10/29/2018] [Indexed: 12/24/2022]
Abstract
NOD-like receptors (NLR) are critical regulators of innate immune signaling. The NLR family consists of 22 human proteins with a conserved structure containing a central oligomerization NACHT domain, an N-terminal interaction domain, and a variable number of C-terminal leucine-rich repeats. Most NLR proteins function as cytosolic pattern recognition receptors with activation of downstream inflammasome signaling, NF-κB, or MAPK activation. Although NLRP10 is the only NLR protein lacking the leucine rich repeats, it has been implicated in multiple immune pathways, including the regulation of inflammatory responses toward Leishmania major and Shigella flexneri infection. In this study, we identify Abin-1, a negative regulator of NF-κB, as an interaction partner of NLRP10 that binds to the NACHT domain of NLRP10. Using S. flexneri as an infection model in human epithelial cells, our work reveals a novel function of NLRP10 in destabilizing Abin-1, resulting in enhanced proinflammatory signaling. Our data give insight into the molecular mechanism underlying the function of NLRP10 in innate immune responses.
Collapse
Affiliation(s)
- Nora Mirza
- Institute of Nutritional Medicine, University of Hohenheim, 70593 Stuttgart, Germany; and
| | - Anna S Sowa
- Institute of Nutritional Medicine, University of Hohenheim, 70593 Stuttgart, Germany; and
| | - Katja Lautz
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, 50931 Cologne, Germany
| | - Thomas A Kufer
- Institute of Nutritional Medicine, University of Hohenheim, 70593 Stuttgart, Germany; and
| |
Collapse
|
28
|
Ellwanger K, Becker E, Kienes I, Sowa A, Postma Y, Cardona Gloria Y, Weber ANR, Kufer TA. The NLR family pyrin domain-containing 11 protein contributes to the regulation of inflammatory signaling. J Biol Chem 2018; 293:2701-2710. [PMID: 29301940 DOI: 10.1074/jbc.ra117.000152] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 12/14/2017] [Indexed: 11/06/2022] Open
Abstract
Mammalian Nod-like receptor (NLR) proteins contribute to the regulation and induction of innate and adaptive immunity in mammals, although the function of about half of the currently identified NLR proteins remains poorly characterized. Here we analyzed the function of the primate-specific NLRP11 gene product. We show that NLRP11 is highly expressed in immune cells, including myeloid cells, B cells, and some B cell lymphoma lines. Overexpression of NLRP11 in human cells did not trigger key innate immune signaling pathways, including NF-κB and type I interferon responses. NLRP11 harbors a pyrin domain, which is responsible for inflammasome formation in related NLR proteins. However, NLRP11 did not interact with the inflammasome adaptor protein ASC, and it did not trigger caspase-1 activation. By contrast, expression of NLRP11 specifically repressed NF-κB and type I interferon responses, two key innate immune pathways involved in inflammation. This effect was independent of the pyrin domain and ATPase activity of NLRP11. siRNA-mediated knockdown of NLRP11 in human myeloid THP1 cells validated these findings and revealed enhanced lipopolysaccharide and Sendai virus-induced cytokine and interferon responses, respectively, in cells with reduced NLRP11 expression. In summary, our work identifies a novel role of NLRP11 in the regulation of inflammatory responses in human cells.
Collapse
Affiliation(s)
- Kornelia Ellwanger
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Emily Becker
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Ioannis Kienes
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Anna Sowa
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Yvonne Postma
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany
| | | | | | - Thomas A Kufer
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany.
| |
Collapse
|
29
|
Nas A, Mirza N, Hägele F, Kahlhöfer J, Keller J, Rising R, Kufer TA, Bosy-Westphal A. Impact of breakfast skipping compared with dinner skipping on regulation of energy balance and metabolic risk. Am J Clin Nutr 2017; 105:1351-1361. [PMID: 28490511 DOI: 10.3945/ajcn.116.151332] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 04/04/2017] [Indexed: 11/14/2022] Open
Abstract
Background: Meal skipping has become an increasing trend of the modern lifestyle that may lead to obesity and type 2 diabetes.Objective: We investigated whether the timing of meal skipping impacts these risks by affecting circadian regulation of energy balance, glucose metabolism, and postprandial inflammatory responses.Design: In a randomized controlled crossover trial, 17 participants [body mass index (in kg/m2): 23.7 ± 4.6] underwent 3 isocaloric 24-h interventions (55%, 30%, and 15% carbohydrate, fat, and protein, respectively): a breakfast skipping day (BSD) and a dinner skipping day (DSD) separated by a conventional 3-meal-structure day (control). Energy and macronutrient balance was measured in a respiration chamber. Postprandial glucose, insulin, and inflammatory responses in leukocytes as well as 24-h glycemia and insulin secretion were analyzed.Results: When compared with the 3-meal control, 24-h energy expenditure was higher on both skipping days (BSD: +41 kcal/d; DSD: +91 kcal/d; both P < 0.01), whereas fat oxidation increased on the BSD only (+16 g/d; P < 0.001). Spontaneous physical activity, 24-h glycemia, and 24-h insulin secretion did not differ between intervention days. The postprandial homeostasis model assessment index (+54%) and glucose concentrations after lunch (+46%) were, however, higher on the BSD than on the DSD (both P < 0.05). Concomitantly, a longer fasting period with breakfast skipping also increased the inflammatory potential of peripheral blood cells after lunch.Conclusions: Compared with 3 meals/d, meal skipping increased energy expenditure. In contrast, higher postprandial insulin concentrations and increased fat oxidation with breakfast skipping suggest the development of metabolic inflexibility in response to prolonged fasting that may in the long term lead to low-grade inflammation and impaired glucose homeostasis. This trial was registered at clinicaltrials.gov as NCT02635139.
Collapse
Affiliation(s)
- Alessa Nas
- Departments of Applied Nutrition and Dietetics and
| | - Nora Mirza
- Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany; and
| | | | | | | | | | - Thomas A Kufer
- Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany; and
| | | |
Collapse
|
30
|
Neuper T, Ellwanger K, Schwarz H, Kufer TA, Duschl A, Horejs-Hoeck J. NOD1 modulates IL-10 signalling in human dendritic cells. Sci Rep 2017; 7:1005. [PMID: 28432285 PMCID: PMC5430717 DOI: 10.1038/s41598-017-00691-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 03/08/2017] [Indexed: 02/06/2023] Open
Abstract
NOD1 belongs to the family of NOD-like receptors, which is a group of well-characterised, cytosolic pattern-recognition receptors. The best-studied function of NOD-like receptors is their role in generating immediate pro-inflammatory and antimicrobial responses by detecting specific bacterial peptidoglycans or by responding to cellular stress and danger-associated molecules. The present study describes a regulatory, peptidoglycan-independent function of NOD1 in anti-inflammatory immune responses. We report that, in human dendritic cells, NOD1 balances IL-10-induced STAT1 and STAT3 activation by a SOCS2-dependent mechanism, thereby suppressing the tolerogenic dendritic cell phenotype. Based on these findings, we propose that NOD1 contributes to inflammation not only by promoting pro-inflammatory processes, but also by suppressing anti-inflammatory pathways.
Collapse
Affiliation(s)
- Theresa Neuper
- Department of Molecular Biology, University of Salzburg, Salzburg, Austria
| | - Kornelia Ellwanger
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, Stuttgart, Germany
| | - Harald Schwarz
- Department of Molecular Biology, University of Salzburg, Salzburg, Austria
| | - Thomas A Kufer
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, Stuttgart, Germany
| | - Albert Duschl
- Department of Molecular Biology, University of Salzburg, Salzburg, Austria
| | - Jutta Horejs-Hoeck
- Department of Molecular Biology, University of Salzburg, Salzburg, Austria.
| |
Collapse
|
31
|
Abstract
NLRC5 is a member of the NLR family that acts as a transcriptional activator of MHC class I genes. In line with the function of several related NLR proteins in innate immune responses, there is, however, also ample evidence that NLRC5 contributes to innate and adaptive immune responses beyond the regulation of MHC class I genes. In human and murine cells, for example, NLRC5 was proposed to contribute to inflammatory and type I interferon responses. The role of NLRC5 in these and other cellular processes is hitherto still not well understood and blurred by discrepancies in the reported data. Here, we provide a detailed and critical discussion of the available experimental data on the emerging biological functions of NLRC5 in innate immune responses in men and mice. Better awareness of the multiple roles of NLRC5 will help to define its overall contribution to immune responses and cancer.
Collapse
Affiliation(s)
- Szilvia Benkő
- Faculty of Medicine, Department of Physiology, University of Debrecen , Debrecen , Hungary
| | - Elek Gergő Kovács
- Faculty of Medicine, Department of Physiology, University of Debrecen , Debrecen , Hungary
| | - Felix Hezel
- Institute of Nutritional Medicine, University of Hohenheim , Stuttgart , Germany
| | - Thomas A Kufer
- Institute of Nutritional Medicine, University of Hohenheim , Stuttgart , Germany
| |
Collapse
|
32
|
Ajendra J, Specht S, Ziewer S, Schiefer A, Pfarr K, Parčina M, Kufer TA, Hoerauf A, Hübner MP. NOD2 dependent neutrophil recruitment is required for early protective immune responses against infectious Litomosoides sigmodontis L3 larvae. Sci Rep 2016; 6:39648. [PMID: 28004792 PMCID: PMC5177913 DOI: 10.1038/srep39648] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 11/15/2016] [Indexed: 12/22/2022] Open
Abstract
Nucleotide-binding oligomerization domain-containing protein 2 (NOD2) recognizes muramyl dipeptide (MDP) of bacterial cell walls, triggering NFκB-induced pro-inflammation. As most human pathogenic filariae contain Wolbachia endobacteria that synthesize the MDP-containing cell wall precursor lipid II, NOD2’s role during infection with the rodent filaria Litomosoides sigmodontis was investigated. In NFκB reporter-cells, worm-extract containing Wolbachia induced NOD2 and NOD1. NOD2-deficient mice infected with L. sigmodontis had significantly more worms than wildtype controls early in infection. Increased worm burden was not observed after subcutaneous infection, suggesting that protective NOD2-dependent immune responses occur within the skin. Flow cytometry demonstrated that neutrophil recruitment to the skin was impaired in NOD2−/− mice after intradermal injection of third stage larvae (L3), and blood neutrophil numbers were reduced after L. sigmodontis infection. PCR array supported the requirement of NOD2 for recruitment of neutrophils to the skin, as genes associated with neutrophil recruitment and activation were downregulated in NOD2−/− mice after intradermal L3 injection. Neutrophil depletion before L. sigmodontis infection increased worm recovery in wildtype mice, confirming that neutrophils are essential against invading L3 larvae. This study indicates that NOD-like receptors are implemented in first-line protective immune responses against filarial nematodes.
Collapse
Affiliation(s)
- Jesuthas Ajendra
- Institute of Medical Microbiology, Immunology and Parasitology, University Hospital of Bonn, Bonn, Germany
| | - Sabine Specht
- Institute of Medical Microbiology, Immunology and Parasitology, University Hospital of Bonn, Bonn, Germany
| | - Sebastian Ziewer
- Institute of Medical Microbiology, Immunology and Parasitology, University Hospital of Bonn, Bonn, Germany
| | - Andrea Schiefer
- Institute of Medical Microbiology, Immunology and Parasitology, University Hospital of Bonn, Bonn, Germany
| | - Kenneth Pfarr
- Institute of Medical Microbiology, Immunology and Parasitology, University Hospital of Bonn, Bonn, Germany.,German Center for Infection Research (DZIF), partner site Bonn-Cologne, Bonn, Germany
| | - Marijo Parčina
- Institute of Medical Microbiology, Immunology and Parasitology, University Hospital of Bonn, Bonn, Germany
| | - Thomas A Kufer
- Institute of Nutritional Medicine, University Hohenheim, Stuttgart, Germany
| | - Achim Hoerauf
- Institute of Medical Microbiology, Immunology and Parasitology, University Hospital of Bonn, Bonn, Germany.,German Center for Infection Research (DZIF), partner site Bonn-Cologne, Bonn, Germany
| | - Marc P Hübner
- Institute of Medical Microbiology, Immunology and Parasitology, University Hospital of Bonn, Bonn, Germany
| |
Collapse
|
33
|
Kuri P, Ellwanger K, Kufer TA, Leptin M, Bajoghli B. A high-sensitivity bi-directional reporter to monitor NF-κB activity in cell culture and zebrafish in real time. J Cell Sci 2016; 130:648-657. [PMID: 27980067 DOI: 10.1242/jcs.196485] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 12/08/2016] [Indexed: 12/12/2022] Open
Abstract
Nuclear factor (NF)-κB transcription factors play major roles in numerous biological processes including development and immunity. Here, we engineered a novel bi-directional NF-κB-responsive reporter, pSGNluc, in which a high-affinity NF-κB promoter fragment simultaneously drives expression of luciferase and GFP. Treatment with TNFα (also known as TNF) induced a strong, dose-dependent luciferase signal in cell culture. The degree of induction over background was comparable to that of other NF-κB-driven luciferase reporters, but the absolute level of expression was at least 20-fold higher. This extends the sensitivity range of otherwise difficult assays mediated exclusively by endogenously expressed receptors, as we show for Nod1 signaling in HEK293 cells. To measure NF-κB activity in the living organism, we established a transgenic zebrafish line carrying the pSGNluc construct. Live in toto imaging of transgenic embryos revealed the activation patterns of NF-κB signaling during embryonic development and as responses to inflammatory stimuli. Taken together, by integrating qualitative and quantitative NF-κB reporter activity, pSGNluc is a valuable tool for studying NF-κB signaling at high spatiotemporal resolution in cultured cells and living animals that goes beyond the possibilities provided by currently available reporters.
Collapse
Affiliation(s)
- Paola Kuri
- Directors' Research Unit, European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Kornelia Ellwanger
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70593 Stuttgart, Germany
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, 70593 Stuttgart, Germany
| | - Maria Leptin
- Directors' Research Unit, European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany .,Institute of Genetics, University of Cologne, Zülpicherstrasse 47a, 50674 Cologne, Germany.,EMBO, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Baubak Bajoghli
- Directors' Research Unit, European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany
| |
Collapse
|
34
|
Damm A, Giebeler N, Zamek J, Zigrino P, Kufer TA. Epidermal NLRP10 contributes to contact hypersensitivity responses in mice. Eur J Immunol 2016; 46:1959-69. [PMID: 27221772 DOI: 10.1002/eji.201646401] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 05/07/2016] [Accepted: 05/20/2016] [Indexed: 12/17/2022]
Abstract
The nucleotide binding and oligomerization domain-like receptor (NLR) protein NLRP10 is highly expressed in the epidermis and contributes to cell-autonomous responses against invasive bacteria. To investigate the role of NLRP10 in inflammatory responses of the skin we analyzed the effect of full-body and keratinocyte-specific depletion of NLRP10 in croton oil-induced irritant contact dermatitis (ICD) and 1-fluoro-2,4-dinitrobenzene (DNFB)-induced contact hypersensitivity (CHS) in mice. Nlrp10(-/-) mice were phenotypically normal and skin repair after wounding was not affected by lack of NLRP10. Similarly, we did not detect a contribution of NLRP10 to the ICD response induced by croton oil. In contrast, Nlrp10(-/-) mice showed significantly reduced inflammation in the DNFB-induced CHS response as compared to control animals. Microscopic analysis revealed significantly reduced numbers of CD4(+) and CD8(+) T cells in the infiltrates of animals lacking NLRP10 expression after CHS challenge. Epidermis-specific deletion of Nlrp10 by keratin-14 promotor driven Cre-recombinase was sufficient to account for this phenotype, although lymphocyte recruitment seemed to be unaltered in animals lacking NLRP10 expression in keratinocytes. Taken together, we provide evidence that NLRP10 contributes to T-cell-mediated inflammatory responses in the skin and highlight a physiological role of NLRP10 in epidermal keratinocytes.
Collapse
Affiliation(s)
- Anna Damm
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
| | - Nives Giebeler
- Department of Dermatology and Venerology, University of Cologne, Cologne, Germany
| | - Jan Zamek
- Department of Dermatology and Venerology, University of Cologne, Cologne, Germany
| | - Paola Zigrino
- Department of Dermatology and Venerology, University of Cologne, Cologne, Germany
| | - Thomas A Kufer
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, Stuttgart, Germany
| |
Collapse
|
35
|
Rodriguez GM, Bobbala D, Serrano D, Mayhue M, Champagne A, Saucier C, Steimle V, Kufer TA, Menendez A, Ramanathan S, Ilangumaran S. NLRC5 elicits antitumor immunity by enhancing processing and presentation of tumor antigens to CD8(+) T lymphocytes. Oncoimmunology 2016; 5:e1151593. [PMID: 27471621 PMCID: PMC4938303 DOI: 10.1080/2162402x.2016.1151593] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 01/18/2016] [Accepted: 02/01/2016] [Indexed: 11/10/2022] Open
Abstract
Cancers can escape immunesurveillance by diminishing the expression of MHC class-I molecules (MHC-I) and components of the antigen-processing machinery (APM). Developing new approaches to reverse these defects could boost the efforts to restore antitumor immunity. Recent studies have shown that the expression of MHC-I and antigen-processing molecules is transcriptionally regulated by NOD-like receptor CARD domain containing 5 (NLRC5). To investigate whether NLRC5 could be used to improve tumor immunogenicity, we established stable lines of B16-F10 melanoma cells expressing NLRC5 (B16-5), the T cell co-stimulatory molecule CD80 (B16-CD80) or both (B16-5/80). Cells harboring NLRC5 constitutively expressed MHC-I and LMP2, LMP7 and TAP1 genes of the APM. The B16-5 cells efficiently presented the melanoma antigenic peptide gp10025–33 to Pmel-1 TCR transgenic CD8+ T cells and induced their proliferation. In the presence of CD80, B16-5 cells stimulated Pmel-1 cells even without the addition of gp100 peptide, indicating that NLRC5 facilitated the processing and presentation of endogenous tumor antigen. Upon subcutaneous implantation, B16-5 cells showed markedly reduced tumor growth in C57BL/6 hosts but not in immunodeficient hosts, indicating that the NLRC5-expressing tumor cells elicited antitumor immunity. Following intravenous injection, B16-5 and B16-5/80 cells formed fewer lung tumor foci compared to control cells. In mice depleted of CD8+ T cells, B16-5 cells formed large subcutaneous and lung tumors. Finally, immunization with irradiated B16-5 cells conferred protection against challenge by parental B16 cells. Collectively, our findings indicate that NLRC5 could be exploited to restore tumor immunogenicity and to stimulate protective antitumor immunity.
Collapse
Affiliation(s)
| | | | | | | | - Audrey Champagne
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke , Sherbrooke, Quebec, Canada
| | - Caroline Saucier
- Department of Anatomy and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada; CRCHUS, Sherbrooke, Québec, Canada
| | - Viktor Steimle
- Department of Biology, Faculty of Sciences, Université de Sherbrooke , Sherbrooke, Quebec, Canada
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim , Stuttgart, Germany
| | - Alfredo Menendez
- CRCHUS, Sherbrooke, Québec, Canada; Department of Microbiology and Infectious diseases, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Sheela Ramanathan
- Immunology division, Department of Pediatrics; CRCHUS, Sherbrooke, Québec, Canada
| | - Subburaj Ilangumaran
- Immunology division, Department of Pediatrics; CRCHUS, Sherbrooke, Québec, Canada
| |
Collapse
|
36
|
Affiliation(s)
- Jörg H Fritz
- Department of Microbiology and Immunology, Complex Traits Group, McGill University , Montreal, QC , Canada
| | - Thomas A Kufer
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim , Stuttgart , Germany
| |
Collapse
|
37
|
Abstract
Recognition of bacterial pathogens by the mammalian host relies on the induction of early innate immune responses initiated by the activation of pattern-recognition receptors (PRRs) upon sensing of their cognate microbe-associated-patterns (MAMPs). Successful pathogens have evolved to intercept PRR activation and signaling at multiple steps. The molecular dissection of the underlying mechanisms revealed many of the basic mechanisms used by the immune system. Here we provide an overview of the different strategies used by bacterial pathogens and commensals to subvert and reprogram PPR-mediated innate immune responses. A particular attention is given to recent discoveries highlighting novel molecular details of the host inflammatory response in mammalian cells and current advances in our understanding of the interaction of commensals with PRR-mediated responses.
Collapse
Affiliation(s)
- Gernot Sellge
- Department of Medicine III, University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Thomas A Kufer
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, Fruwirthstr. 12, 70599 Stuttgart, Germany.
| |
Collapse
|
38
|
Ranjan P, Singh N, Kumar A, Neerincx A, Kremmer E, Cao W, Davis WG, Katz JM, Gangappa S, Lin R, Kufer TA, Sambhara S. NLRC5 interacts with RIG-I to induce a robust antiviral response against influenza virus infection. Eur J Immunol 2015; 45:758-72. [PMID: 25404059 DOI: 10.1002/eji.201344412] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 10/15/2014] [Accepted: 11/13/2014] [Indexed: 12/16/2023]
Abstract
The NLR protein, NLRC5 is an important regulator of MHC class I gene expression, however, the role of NLRC5 in other innate immune responses is less well defined. In the present study, we report that NLRC5 binds RIG-I and that this interaction is critical for robust antiviral responses against influenza virus. Overexpression of NLRC5 in the human lung epithelial cell line, A549, and normal human bronchial epithelial cells resulted in impaired replication of influenza virus A/Puerto Rico/8/34 virus (PR8) and enhanced IFN-β expression. Influenza virus leads to induction of IFN-β that drives RIG-I and NLRC5 expression in host cells. Our results suggest that NLRC5 extends and stabilizes influenza virus induced RIG-I expression and delays expression of the viral inhibitor protein NS1. We show that NS1 binds to NLRC5 to suppress its function. Interaction domain mapping revealed that NLRC5 interacts with RIG-I via its N-terminal death domain and that NLRC5 enhanced antiviral activity in an leucine-rich repeat domain independent manner. Taken together, our findings identify a novel role for NLRC5 in RIG-I-mediated antiviral host responses against influenza virus infection, distinguished from the role of NLRC5 in MHC class I gene regulation.
Collapse
Affiliation(s)
- Priya Ranjan
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Bielig H, Lautz K, Braun PR, Menning M, Machuy N, Brügmann C, Barisic S, Eisler SA, Andree M, Zurek B, Kashkar H, Sansonetti PJ, Hausser A, Meyer TF, Kufer TA. The cofilin phosphatase slingshot homolog 1 (SSH1) links NOD1 signaling to actin remodeling. PLoS Pathog 2014; 10:e1004351. [PMID: 25187968 PMCID: PMC4154870 DOI: 10.1371/journal.ppat.1004351] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 07/15/2014] [Indexed: 01/01/2023] Open
Abstract
NOD1 is an intracellular pathogen recognition receptor that contributes to anti-bacterial innate immune responses, adaptive immunity and tissue homeostasis. NOD1-induced signaling relies on actin remodeling, however, the details of the connection of NOD1 and the actin cytoskeleton remained elusive. Here, we identified in a druggable-genome wide siRNA screen the cofilin phosphatase SSH1 as a specific and essential component of the NOD1 pathway. We show that depletion of SSH1 impaired pathogen induced NOD1 signaling evident from diminished NF-κB activation and cytokine release. Chemical inhibition of actin polymerization using cytochalasin D rescued the loss of SSH1. We further demonstrate that NOD1 directly interacted with SSH1 at F-actin rich sites. Finally, we show that enhanced cofilin activity is intimately linked to NOD1 signaling. Our data thus provide evidence that NOD1 requires the SSH1/cofilin network for signaling and to detect bacterial induced changes in actin dynamics leading to NF-κB activation and innate immune responses.
Collapse
Affiliation(s)
- Harald Bielig
- Institute for Medical Microbiology, Immunology and Hygiene, Cologne, Germany
| | - Katja Lautz
- Institute for Medical Microbiology, Immunology and Hygiene, Cologne, Germany
| | - Peter R. Braun
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
- Steinbeis-Innovationszentrum Center for Systems Biomedicine, Falkensee, Germany
| | - Maureen Menning
- Institute for Medical Microbiology, Immunology and Hygiene, Cologne, Germany
| | - Nikolaus Machuy
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Christine Brügmann
- Institute for Medical Microbiology, Immunology and Hygiene, Cologne, Germany
| | - Sandra Barisic
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
| | - Stephan A. Eisler
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
| | - Maria Andree
- Institute for Medical Microbiology, Immunology and Hygiene, Cologne, Germany
| | - Birte Zurek
- Institute for Medical Microbiology, Immunology and Hygiene, Cologne, Germany
| | - Hamid Kashkar
- Institute for Medical Microbiology, Immunology and Hygiene, Cologne, Germany
| | - Philippe J. Sansonetti
- Unité de Pathogénie Microbienne Moléculaire, Institut Pasteur, Paris, France
- INSERM U786, Institut Pasteur, Paris, France
- Microbiologie et Maladies Infectieuses, Collège de France, Paris, France
| | - Angelika Hausser
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
| | - Thomas F. Meyer
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Thomas A. Kufer
- Institute for Medical Microbiology, Immunology and Hygiene, Cologne, Germany
- University of Hohenheim, Institute of Nutritional Medicine, Stuttgart, Germany
- * E-mail:
| |
Collapse
|
40
|
Neerincx A, Jakobshagen K, Utermöhlen O, Büning H, Steimle V, Kufer TA. The N-Terminal Domain of NLRC5 Confers Transcriptional Activity for MHC Class I and II Gene Expression. J I 2014; 193:3090-100. [DOI: 10.4049/jimmunol.1401065] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
41
|
Andree M, Seeger JM, Schüll S, Coutelle O, Wagner-Stippich D, Wiegmann K, Wunderlich CM, Brinkmann K, Broxtermann P, Witt A, Fritsch M, Martinelli P, Bielig H, Lamkemeyer T, Rugarli EI, Kaufmann T, Sterner-Kock A, Wunderlich FT, Villunger A, Martins LM, Krönke M, Kufer TA, Utermöhlen O, Kashkar H. BID-dependent release of mitochondrial SMAC dampens XIAP-mediated immunity against Shigella. EMBO J 2014; 33:2171-87. [PMID: 25056906 DOI: 10.15252/embj.201387244] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The X-linked inhibitor of apoptosis protein (XIAP) is a potent caspase inhibitor, best known for its anti-apoptotic function in cancer. During apoptosis, XIAP is antagonized by SMAC, which is released from the mitochondria upon caspase-mediated activation of BID. Recent studies suggest that XIAP is involved in immune signaling. Here, we explore XIAP as an important mediator of an immune response against the enteroinvasive bacterium Shigella flexneri, both in vitro and in vivo. Our data demonstrate for the first time that Shigella evades the XIAP-mediated immune response by inducing the BID-dependent release of SMAC from the mitochondria. Unlike apoptotic stimuli, Shigella activates the calpain-dependent cleavage of BID to trigger the release of SMAC, which antagonizes the inflammatory action of XIAP without inducing apoptosis. Our results demonstrate how the cellular death machinery can be subverted by an invasive pathogen to ensure bacterial colonization.
Collapse
Affiliation(s)
- Maria Andree
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Jens M Seeger
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Stephan Schüll
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Oliver Coutelle
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Diana Wagner-Stippich
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Katja Wiegmann
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
| | - Claudia M Wunderlich
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany Max Planck Institute for Metabolism Research, Cologne, Germany
| | - Kerstin Brinkmann
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Pia Broxtermann
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Axel Witt
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Melanie Fritsch
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Paola Martinelli
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany Max Planck Institute for Metabolism Research, Cologne, Germany
| | - Harald Bielig
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
| | - Tobias Lamkemeyer
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Elena I Rugarli
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany Max Planck Institute for Metabolism Research, Cologne, Germany
| | - Thomas Kaufmann
- Institute of Pharmacology, University of Bern, Bern, Switzerland
| | - Anja Sterner-Kock
- Center for Experimental Medicine (CEM), University of Cologne, Cologne, Germany
| | - F Thomas Wunderlich
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany Max Planck Institute for Metabolism Research, Cologne, Germany
| | - Andreas Villunger
- Division of Developmental Immunology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - L Miguel Martins
- Cell Death Regulation Laboratory, MRC Toxicology Unit, Leicester, UK
| | - Martin Krönke
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Thomas A Kufer
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
| | - Olaf Utermöhlen
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Hamid Kashkar
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| |
Collapse
|
42
|
Mayle S, Boyle JP, Sekine E, Zurek B, Kufer TA, Monie TP. Engagement of nucleotide-binding oligomerization domain-containing protein 1 (NOD1) by receptor-interacting protein 2 (RIP2) is insufficient for signal transduction. J Biol Chem 2014; 289:22900-22914. [PMID: 24958724 PMCID: PMC4132792 DOI: 10.1074/jbc.m114.557900] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Following activation, the cytoplasmic pattern recognition receptor nucleotide-binding oligomerization domain-containing protein 1 (NOD1) interacts with its adaptor protein receptor-interacting protein 2 (RIP2) to propagate immune signaling and initiate a proinflammatory immune response. This interaction is mediated by the caspase recruitment domain (CARD) of both proteins. Polymorphisms in immune proteins can affect receptor function and predispose individuals to specific autoinflammatory disorders. In this report, we show that mutations in helix 2 of the CARD of NOD1 disrupted receptor function but did not interfere with RIP2 interaction. In particular, N43S, a rare polymorphism, resulted in receptor dysfunction despite retaining normal cellular localization, protein folding, and an ability to interact with RIP2. Mutation of Asn-43 resulted in an increased tendency to form dimers, which we propose is the source of this dysfunction. We also demonstrate that mutation of Lys-443 and Tyr-474 in RIP2 disrupted the interaction with NOD1. Mapping the key residues involved in the interaction between NOD1 and RIP2 to the known structures of CARD complexes revealed the likely involvement of both type I and type III interfaces in the NOD1·RIP2 complex. Overall we demonstrate that the NOD1-RIP2 signaling axis is more complex than previously assumed, that simple engagement of RIP2 is insufficient to mediate signaling, and that the interaction between NOD1 and RIP2 constitutes multiple CARD-CARD interfaces.
Collapse
Affiliation(s)
- Sophie Mayle
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom
| | - Joseph P Boyle
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom
| | - Eiki Sekine
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom
| | - Birte Zurek
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Goldenfelsstrasse 19-21, 50935 Köln, Germany, and
| | - Thomas A Kufer
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Goldenfelsstrasse 19-21, 50935 Köln, Germany, and
| | - Tom P Monie
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom,; Department of Veterinary Medicine, University of Cambridge, Cambridge CB3 0ES, United Kingdom.
| |
Collapse
|
43
|
Abstract
Nucleotide-binding domain and leucine-rich repeat containing receptors (NLRs) are intracellular proteins mainly involved in pathogen recognition, inflammatory responses, and cell death. Until recently, the function of the family member NLR caspase recruitment domain (CARD) containing 5 (NLRC5) has been a matter of debate. It is now clear that NLRC5 acts as a transcriptional regulator of the major-histocompatibility complex class I. In this review we detail the development of our understanding of NLRC5 function, discussing both the accepted and the controversial aspects of NLRC5 activity. We give insight into the molecular mechanisms, and the potential implications, of NLRC5 function in health and disease.
Collapse
Affiliation(s)
- Andreas Neerincx
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne , Cologne , Germany
| | | | | | | |
Collapse
|
44
|
|
45
|
Menning M, Kufer TA. A role for the Ankyrin repeat containing protein Ankrd17 in Nod1- and Nod2-mediated inflammatory responses. FEBS Lett 2013; 587:2137-42. [DOI: 10.1016/j.febslet.2013.05.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 04/17/2013] [Accepted: 05/01/2013] [Indexed: 10/26/2022]
|
46
|
Zurek B, Schoultz I, Neerincx A, Napolitano LM, Birkner K, Bennek E, Sellge G, Lerm M, Meroni G, Söderholm JD, Kufer TA. TRIM27 negatively regulates NOD2 by ubiquitination and proteasomal degradation. PLoS One 2012; 7:e41255. [PMID: 22829933 PMCID: PMC3400628 DOI: 10.1371/journal.pone.0041255] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Accepted: 06/19/2012] [Indexed: 01/07/2023] Open
Abstract
NOD2, the nucleotide-binding domain and leucine-rich repeat containing gene family (NLR) member 2 is involved in mediating antimicrobial responses. Dysfunctional NOD2 activity can lead to severe inflammatory disorders, but the regulation of NOD2 is still poorly understood. Recently, proteins of the tripartite motif (TRIM) protein family have emerged as regulators of innate immune responses by acting as E3 ubiquitin ligases. We identified TRIM27 as a new specific binding partner for NOD2. We show that NOD2 physically interacts with TRIM27 via the nucleotide-binding domain, and that NOD2 activation enhances this interaction. Dependent on functional TRIM27, ectopically expressed NOD2 is ubiquitinated with K48-linked ubiquitin chains followed by proteasomal degradation. Accordingly, TRIM27 affects NOD2-mediated pro-inflammatory responses. NOD2 mutations are linked to susceptibility to Crohn's disease. We found that TRIM27 expression is increased in Crohn's disease patients, underscoring a physiological role of TRIM27 in regulating NOD2 signaling. In HeLa cells, TRIM27 is partially localized in the nucleus. We revealed that ectopically expressed NOD2 can shuttle to the nucleus in a Walker A dependent manner, suggesting that NOD2 and TRIM27 might functionally cooperate in the nucleus. We conclude that TRIM27 negatively regulates NOD2-mediated signaling by degradation of NOD2 and suggest that TRIM27 could be a new target for therapeutic intervention in NOD2-associated diseases.
Collapse
Affiliation(s)
- Birte Zurek
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
| | - Ida Schoultz
- Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden, and Department of Surgery, Linköping, Sweden
| | - Andreas Neerincx
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
| | - Luisa M. Napolitano
- Cluster in Biomedicine (CBM), AREA Science Park, Trieste, Italy
- Telethon Institute of Genetics and Medicine, Naples, Italy
| | - Katharina Birkner
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
| | - Eveline Bennek
- Department of Medicine III, University Hospital Aachen, Aachen, Germany
| | - Gernot Sellge
- Department of Medicine III, University Hospital Aachen, Aachen, Germany
| | - Maria Lerm
- Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden, and Department of Surgery, Linköping, Sweden
| | - Germana Meroni
- Cluster in Biomedicine (CBM), AREA Science Park, Trieste, Italy
| | - Johan D. Söderholm
- Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden, and Department of Surgery, Linköping, Sweden
| | - Thomas A. Kufer
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
- * E-mail:
| |
Collapse
|
47
|
Lautz K, Damm A, Menning M, Wenger J, Adam AC, Zigrino P, Kremmer E, Kufer TA. NLRP10 enhances Shigella-induced pro-inflammatory responses. Cell Microbiol 2012; 14:1568-83. [PMID: 22672233 DOI: 10.1111/j.1462-5822.2012.01822.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 05/18/2012] [Accepted: 05/26/2012] [Indexed: 01/01/2023]
Abstract
Members of the NLR family evolved as intracellular sensors for bacterial and viral infection. However, our knowledge on the implication of most of the human NLR proteins in innate immune responses still remains fragmentary. Here we characterized the role of human NLRP10 in bacterial infection. Our data revealed that NLRP10 is a cytoplasmic localized protein that positively contributes to innate immune responses induced by the invasive bacterial pathogen Shigella flexneri. SiRNA-mediated knock-down studies showed that NLRP10 contributes to pro-inflammatory cytokine release triggered by Shigella in epithelial cells and primary dermal fibroblasts, by influencing p38 and NF-κB activation. This effect is dependent on the ATPase activity of NLRP10 and its PYD domain. Mechanistically, NLRP10 interacts with NOD1, a NLR that is pivotally involved in sensing of invasive microbes, and both proteins are recruited to the bacterial entry point at the plasma membrane. Moreover, NLRP10 physically interacts with downstream components of the NOD1 signalling pathway, such as RIP2, TAK1 and NEMO. Taken together, our data revealed a novel role of NLRP10 in innate immune responses towards bacterial infection and suggest that NLRP10 functions as a scaffold for the formation of the NOD1-Nodosome.
Collapse
Affiliation(s)
- Katja Lautz
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
| | | | | | | | | | | | | | | |
Collapse
|
48
|
Lecat A, Di Valentin E, Somja J, Jourdan S, Fillet M, Kufer TA, Habraken Y, Sadzot C, Louis E, Delvenne P, Piette J, Legrand-Poels S. The c-Jun N-terminal kinase (JNK)-binding protein (JNKBP1) acts as a negative regulator of NOD2 protein signaling by inhibiting its oligomerization process. J Biol Chem 2012; 287:29213-26. [PMID: 22700971 DOI: 10.1074/jbc.m112.355545] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
NOD2 is one of the best characterized members of the cytosolic NOD-like receptor family. NOD2 is able to sense muramyl dipeptide, a specific bacterial cell wall component, and to subsequently induce various signaling pathways leading to NF-κB activation and autophagy, both events contributing to an efficient innate and adaptive immune response. Interestingly, loss-of-function NOD2 variants were associated with a higher susceptibility for Crohn disease, which highlights the physiological importance of proper regulation of NOD2 activity. We performed a biochemical screen to search for new NOD2 regulators. We identified a new NOD2 partner, c-Jun N-terminal kinase-binding protein 1 (JNKBP1), a scaffold protein characterized by an N-terminal WD-40 domain. JNKBP1, through its WD-40 domain, binds to NOD2 following muramyl dipeptide activation. This interaction attenuates NOD2-mediated NF-κB activation and IL-8 secretion as well as NOD2 antibacterial activity. JNKBP1 exerts its repressor effect by disturbing NOD2 oligomerization and RIP2 tyrosine phosphorylation, both steps required for downstream NOD2 signaling. We furthermore showed that JNKBP1 and NOD2 are co-expressed in the human intestinal epithelium and in immune cells recruited in the lamina propria, which suggests that JNKBP1 contributes to maintain NOD2-mediated intestinal immune homeostasis.
Collapse
Affiliation(s)
- Aurore Lecat
- Laboratory of Virology and Immunology, GIGA-R, B34, University of Liege, B-4000 Liege, Belgium
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Neerincx A, Rodriguez GM, Steimle V, Kufer TA. NLRC5 controls basal MHC class I gene expression in an MHC enhanceosome-dependent manner. J Immunol 2012; 188:4940-50. [PMID: 22490867 DOI: 10.4049/jimmunol.1103136] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Nucleotide-binding domain and leucine-rich repeat (NLR) proteins play important roles in innate immune responses as pattern-recognition receptors. Although most NLR proteins act in cell autonomous immune pathways, some do not function as classical pattern-recognition receptors. One such NLR protein is the MHC class II transactivator, the master regulator of MHC class II gene transcription. In this article, we report that human NLRC5, which we recently showed to be involved in viral-mediated type I IFN responses, shuttles to the nucleus and activates MHC class I gene expression. Knockdown of NLRC5 in different human cell lines and primary dermal fibroblasts leads to reduced MHC class I expression, whereas introduction of NLRC5 into cell types with very low expression of MHC class I augments MHC class I expression to levels comparable to those found in lymphocytes. Expression of NLRC5 positively correlates with MHC class I expression in human tissues. Functionally, we show that both the N-terminal effector domain of NLRC5 and its C-terminal leucine-rich repeat domain are needed for activation of MHC class I expression. Moreover, nuclear shuttling and function depend on a functional Walker A motif. Finally, we identified a promoter sequence in the MHC class I promoter, the X1 box, to be involved in NLRC5-mediated MHC class I gene activation. Taken together, this suggested that NLRC5 acts in a manner similar to class II transactivator to drive MHC expression and revealed NLRC5 as an important regulator of basal MHC class I expression.
Collapse
Affiliation(s)
- Andreas Neerincx
- Institute for Medical Microbiology, Immunology, and Hygiene, University of Cologne, 50931 Cologne, Germany
| | | | | | | |
Collapse
|
50
|
Saiai A, Bielig H, Velder J, Neudörfl JM, Menning M, Kufer TA, Schmalz HG. Hydrophenalene–Cr(CO)3 complexes as anti-inflammatory agents based on specific inhibition of NOD2 signalling: a SAR study. Med Chem Commun 2012. [DOI: 10.1039/c2md20221b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|