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Nakamura T, Ohyama C, Sakamoto M, Toma T, Tateishi H, Matsuo M, Chirifu M, Ikemizu S, Morioka H, Fujita M, Inoue JI, Yamagata Y. TIFAB regulates the TIFA-TRAF6 signaling pathway involved in innate immunity by forming a heterodimer complex with TIFA. Proc Natl Acad Sci U S A 2024; 121:e2318794121. [PMID: 38442163 PMCID: PMC10945758 DOI: 10.1073/pnas.2318794121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Accepted: 02/07/2024] [Indexed: 03/07/2024] Open
Abstract
Nuclear factor κB (NF-κB) is activated by various inflammatory and infectious molecules and is involved in immune responses. It has been elucidated that ADP-β-D-manno-heptose (ADP-Hep), a metabolite in gram-negative bacteria, activates NF-κB through alpha-kinase 1 (ALPK1)-TIFA-TRAF6 signaling. ADP-Hep stimulates the kinase activity of ALPK1 for TIFA phosphorylation. Complex formation between phosphorylation-dependent TIFA oligomer and TRAF6 promotes the polyubiquitination of TRAF6 for NF-κB activation. TIFAB, a TIFA homolog lacking a phosphorylation site and a TRAF6 binding motif, is a negative regulator of TIFA-TRAF6 signaling and is implicated in myeloid diseases. TIFAB is indicated to regulate TIFA-TRAF6 signaling through interactions with TIFA and TRAF6; however, little is known about its biological function. We demonstrated that TIFAB forms a complex not with the TIFA dimer, an intrinsic form of TIFA involved in NF-κB activation, but with monomeric TIFA. The structural analysis of the TIFA/TIFAB complex and the biochemical and cell-based analyses showed that TIFAB forms a stable heterodimer with TIFA, inhibits TIFA dimer formation, and suppresses TIFA-TRAF6 signaling. The resultant TIFA/TIFAB complex is a "pseudo-TIFA dimer" lacking the phosphorylation site and TRAF6 binding motif in TIFAB and cannot form the orderly structure as proposed for the phosphorylated TIFA oligomer involved in NF-κB activation. This study elucidated the molecular and structural basis for the regulation of TIFA-TRAF6 signaling by TIFAB.
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Affiliation(s)
- Teruya Nakamura
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto862-0973, Japan
| | - Chiaki Ohyama
- School of Pharmacy, Kumamoto University, Kumamoto862-0973, Japan
| | - Madoka Sakamoto
- School of Pharmacy, Kumamoto University, Kumamoto862-0973, Japan
| | - Tsugumasa Toma
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto862-0973, Japan
| | - Hiroshi Tateishi
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto862-0973, Japan
| | - Mihoko Matsuo
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto862-0973, Japan
| | - Mami Chirifu
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto862-0973, Japan
| | - Shinji Ikemizu
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto862-0973, Japan
| | - Hiroshi Morioka
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto862-0973, Japan
| | - Mikako Fujita
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto862-0973, Japan
| | - Jun-ichiro Inoue
- The University of Tokyo Pandemic Preparedness, Infection and Advanced Research Center (UTOPIA), 4-6-1 Shirokanedai, Minato-ku, Tokyo108-0071, Japan
| | - Yuriko Yamagata
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto862-0973, Japan
- Shokei University and Shokei University Junior College, Kumamoto862-8678, Japan
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2
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Lu J, Liu X, Li X, Li H, Shi L, Xia X, He BL, Meyer TF, Li X, Sun H, Yang X. Copper regulates the host innate immune response against bacterial infection via activation of ALPK1 kinase. Proc Natl Acad Sci U S A 2024; 121:e2311630121. [PMID: 38232278 PMCID: PMC10823219 DOI: 10.1073/pnas.2311630121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 11/22/2023] [Indexed: 01/19/2024] Open
Abstract
Copper is an essential trace element for the human body, and its requirement for optimistic immune functions has been recognized for decades. How copper is involved in the innate immune pathway, however, remains to be clarified. Here, we report that copper serves as a signal molecule to regulate the kinase activity of alpha-kinase 1 (ALPK1), a cytosolic pattern-recognition receptor (PRR), and therefore promotes host cell defense against bacterial infection. We show that in response to infection, host cells actively accumulate copper in the cytosol, and the accumulated cytosolic copper enhances host cell defense against evading pathogens, including intracellular and, unexpectedly, extracellular bacteria. Subsequently, we demonstrate that copper activates the innate immune pathway of host cells in an ALPK1-dependent manner. Further mechanistic studies reveal that copper binds to ALPK1 directly and is essential for the kinase activity of this cytosolic PRR. Moreover, the binding of copper to ALPK1 enhances the sensitivity of ALPK1 to the bacterial metabolite ADP-heptose and eventually prompts host cells to elicit an enhanced immune response during bacterial infection. Finally, using a zebrafish in vivo model, we show that a copper-treated host shows an increased production of proinflammatory cytokines, enhanced recruitment of phagosome cells, and promoted bacterial clearance. Our findings uncover a previously unrecognized role of copper in the modulation of host innate immune response against bacterial pathogens and advance our knowledge on the cross talk between cytosolic copper homeostasis and immune system.
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Affiliation(s)
- Jing Lu
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
- Department of Gastroenterology, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
| | - Xue Liu
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
- Department of Chemistry, The University of Hong Kong, Hong Kong Special Administrative Region, China
- Guangdong-Hong Kong-Macao University Joint Laboratory of Interventional Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
| | - Xinghua Li
- Department of Infectious Diseases, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
| | - Hongyan Li
- Department of Chemistry, The University of Hong Kong, Hong Kong Special Administrative Region, China
- Chinese Academy of Sciences-The University of Hong Kong Joint Laboratory of Metallomics on Health and Environment, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Liwa Shi
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
- Guangdong-Hong Kong-Macao University Joint Laboratory of Interventional Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
| | - Xin Xia
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
- Guangdong-Hong Kong-Macao University Joint Laboratory of Interventional Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
| | - Bai-liang He
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
- Guangdong-Hong Kong-Macao University Joint Laboratory of Interventional Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
| | - Thomas F. Meyer
- Department of Molecular Biology, Max Planck Institute for Infection Biology, Berlin10117, Germany
- Laboratory of Infection Oncology, Institute of Clinical Molecular Biology, Christian Albrecht’s University of Kiel, University Hospital Schleswig Holstein, Kiel24105, Germany
| | - Xiaofeng Li
- Department of Gastroenterology, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
| | - Hongzhe Sun
- Department of Chemistry, The University of Hong Kong, Hong Kong Special Administrative Region, China
- Chinese Academy of Sciences-The University of Hong Kong Joint Laboratory of Metallomics on Health and Environment, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Xinming Yang
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
- Guangdong-Hong Kong-Macao University Joint Laboratory of Interventional Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai519000, China
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3
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Neuper T, Frauenlob T, Dang HH, Krenn PW, Posselt G, Regl C, Fortelny N, Schäpertöns V, Unger MS, Üblagger G, Neureiter D, Mühlbacher I, Weitzendorfer M, Singhartinger F, Emmanuel K, Huber CG, Wessler S, Aberger F, Horejs-Hoeck J. ADP-heptose attenuates Helicobacter pylori-induced dendritic cell activation. Gut Microbes 2024; 16:2402543. [PMID: 39288239 PMCID: PMC11409497 DOI: 10.1080/19490976.2024.2402543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Revised: 07/25/2024] [Accepted: 07/29/2024] [Indexed: 09/19/2024] Open
Abstract
Sophisticated immune evasion strategies enable Helicobacter pylori (H. pylori) to colonize the gastric mucosa of approximately half of the world's population. Persistent infection and the resulting chronic inflammation are a major cause of gastric cancer. To understand the intricate interplay between H. pylori and host immunity, spatial profiling was used to monitor immune cells in H. pylori infected gastric tissue. Dendritic cell (DC) and T cell phenotypes were further investigated in gastric organoid/immune cell co-cultures and mechanistic insights were acquired by proteomics of human DCs. Here, we show that ADP-heptose, a bacterial metabolite originally reported to act as a bona fide PAMP, reduces H. pylori-induced DC maturation and subsequent T cell responses. Mechanistically, we report that H. pylori uptake and subsequent DC activation by an ADP-heptose deficient H. pylori strain depends on TLR2. Moreover, ADP-heptose attenuates full-fledged activation of primary human DCs in the context of H. pylori infection by impairing type I IFN signaling. This study reveals that ADP-heptose mitigates host immunity during H. pylori infection.
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Affiliation(s)
- Theresa Neuper
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
| | - Tobias Frauenlob
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
| | - Hieu-Hoa Dang
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
| | - Peter W Krenn
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
| | - Gernot Posselt
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
| | - Christof Regl
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
| | - Nikolaus Fortelny
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
| | - Veronika Schäpertöns
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
| | - Michael S Unger
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
| | - Gunda Üblagger
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
| | - Daniel Neureiter
- Cancer Cluster Salzburg, Salzburg, Austria
- Institute of Pathology, Uniklinikum Salzburg, Salzburg, Austria
| | - Iris Mühlbacher
- Department of General, Visceral and Thoracic Surgery, Paracelsus Medical University/Salzburger Landeskliniken (SALK), Salzburg, Austria
| | - Michael Weitzendorfer
- Department of General, Visceral and Thoracic Surgery, Paracelsus Medical University/Salzburger Landeskliniken (SALK), Salzburg, Austria
| | - Franz Singhartinger
- Department of General, Visceral and Thoracic Surgery, Paracelsus Medical University/Salzburger Landeskliniken (SALK), Salzburg, Austria
| | - Klaus Emmanuel
- Cancer Cluster Salzburg, Salzburg, Austria
- Department of General, Visceral and Thoracic Surgery, Paracelsus Medical University/Salzburger Landeskliniken (SALK), Salzburg, Austria
| | - Christian G Huber
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
| | - Silja Wessler
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
| | - Fritz Aberger
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
| | - Jutta Horejs-Hoeck
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, Salzburg, Austria
- Center for Tumor Biology and Immunology, Paris-Lodron University Salzburg, Salzburg, Austria
- Cancer Cluster Salzburg, Salzburg, Austria
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4
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Martin-Gallausiaux C, Salesse L, Garcia-Weber D, Marinelli L, Beguet-Crespel F, Brochard V, Le Gléau C, Jamet A, Doré J, Blottière HM, Arrieumerlou C, Lapaque N. Fusobacterium nucleatum promotes inflammatory and anti-apoptotic responses in colorectal cancer cells via ADP-heptose release and ALPK1/TIFA axis activation. Gut Microbes 2024; 16:2295384. [PMID: 38126163 PMCID: PMC10761154 DOI: 10.1080/19490976.2023.2295384] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023] Open
Abstract
The anaerobic bacterium Fusobacterium nucleatum is significantly associated with human colorectal cancer (CRC) and is considered a significant contributor to the disease. The mechanisms underlying the promotion of intestinal tumor formation by F. nucleatum have only been partially uncovered. Here, we showed that F. nucleatum releases a metabolite into the microenvironment that strongly activates NF-κB in intestinal epithelial cells via the ALPK1/TIFA/TRAF6 pathway. Furthermore, we showed that the released molecule had the biological characteristics of ADP-heptose. We observed that F. nucleatum induction of this pathway increased the expression of the inflammatory cytokine IL-8 and two anti-apoptotic genes known to be implicated in CRC, BIRC3 and TNFAIP3. Finally, it promoted the survival of CRC cells and reduced 5-fluorouracil chemosensitivity in vitro. Taken together, our results emphasize the importance of the ALPK1/TIFA pathway in Fusobacterium induced-CRC pathogenesis, and identify the role of ADP-H in this process.
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Affiliation(s)
| | - Laurène Salesse
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | | | - Ludovica Marinelli
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | | | - Vincent Brochard
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Camille Le Gléau
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Alexandre Jamet
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Joël Doré
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
- Université Paris-Saclay, INRAE, Metagenopolis, Jouy-en-Josas, France
| | - Hervé M. Blottière
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
- Université Paris-Saclay, INRAE, Metagenopolis, Jouy-en-Josas, France
| | | | - Nicolas Lapaque
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
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5
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Hauke M, Metz F, Rapp J, Faass L, Bats SH, Radziej S, Link H, Eisenreich W, Josenhans C. Helicobacter pylori Modulates Heptose Metabolite Biosynthesis and Heptose-Dependent Innate Immune Host Cell Activation by Multiple Mechanisms. Microbiol Spectr 2023; 11:e0313222. [PMID: 37129481 PMCID: PMC10269868 DOI: 10.1128/spectrum.03132-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 04/05/2023] [Indexed: 05/03/2023] Open
Abstract
Heptose metabolites including ADP-d-glycero-β-d-manno-heptose (ADP-heptose) are involved in bacterial lipopolysaccharide and cell envelope biosynthesis. Recently, heptoses were also identified to have potent proinflammatory activity on human cells as novel microbe-associated molecular patterns. The gastric pathogenic bacterium Helicobacter pylori produces heptose metabolites, which it transports into human cells through its Cag type 4 secretion system. Using H. pylori as a model, we have addressed the question of how proinflammatory ADP-heptose biosynthesis can be regulated by bacteria. We have characterized the interstrain variability and regulation of heptose biosynthesis genes and the modulation of heptose metabolite production by H. pylori, which impact cell-autonomous proinflammatory human cell activation. HldE, a central enzyme of heptose metabolite biosynthesis, showed strong sequence variability between strains and was also variably expressed between strains. Amounts of gene transcripts in the hldE gene cluster displayed intrastrain and interstrain differences, were modulated by host cell contact and the presence of the cag pathogenicity island, and were affected by carbon starvation regulator A (CsrA). We reconstituted four steps of the H. pylori lipopolysaccharide (LPS) heptose biosynthetic pathway in vitro using recombinant purified GmhA, HldE, and GmhB proteins. On the basis of one- and two-dimensional nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry, the structures of major reaction products were identified as β-d-ADP-heptose and β-heptose-1-monophosphate. A proinflammatory heptose-monophosphate variant was also identified for the first time as a novel cell-active product in H. pylori bacteria. Separate purified HldE subdomains and variant HldE allowed us to uncover additional strain variation in generating heptose metabolites. IMPORTANCE Bacterial heptose metabolites, intermediates of lipopolysaccharide (LPS) biosynthesis, are novel microbe-associated molecular patterns (MAMPs) that activate proinflammatory signaling. In the gastric pathogen Helicobacter pylori, heptoses are transferred into host cells by the Cag type IV secretion system, which is also involved in carcinogenesis. Little is known about how H. pylori, which is highly strain variable, regulates heptose biosynthesis and downstream host cell activation. We report here that the regulation of proinflammatory heptose production by H. pylori is strain specific. Heptose gene cluster activity is modulated by the presence of an active cag pathogenicity island (cagPAI), contact with human cells, and the carbon starvation regulator A. Reconstitution with purified biosynthesis enzymes and purified bacterial lysates allowed us to biochemically characterize heptose pathway products, identifying a heptose-monophosphate variant as a novel proinflammatory metabolite. These findings emphasize that the bacteria use heptose biosynthesis to fine-tune inflammation and also highlight opportunities to mine the heptose biosynthesis pathway as a potential therapeutic target against infection, inflammation, and cancer.
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Affiliation(s)
- Martina Hauke
- Max von Pettenkofer Institute, Ludwig Maximilians University Munich, München, Germany
| | - Felix Metz
- Max von Pettenkofer Institute, Ludwig Maximilians University Munich, München, Germany
| | - Johanna Rapp
- Bacterial Metabolomics, CMFI, University Tübingen, Tübingen, Germany
| | - Larissa Faass
- Max von Pettenkofer Institute, Ludwig Maximilians University Munich, München, Germany
| | - Simon H. Bats
- Max von Pettenkofer Institute, Ludwig Maximilians University Munich, München, Germany
| | - Sandra Radziej
- Bavarian NMR Center–Structural Membrane Biochemistry, Department of Chemistry, Technical University Munich, Garching, Germany
| | - Hannes Link
- Bacterial Metabolomics, CMFI, University Tübingen, Tübingen, Germany
| | - Wolfgang Eisenreich
- Bavarian NMR Center–Structural Membrane Biochemistry, Department of Chemistry, Technical University Munich, Garching, Germany
| | - Christine Josenhans
- Max von Pettenkofer Institute, Ludwig Maximilians University Munich, München, Germany
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6
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Sidor K, Skirecki T. A Bittersweet Kiss of Gram-Negative Bacteria: The Role of ADP-Heptose in the Pathogenesis of Infection. Microorganisms 2023; 11:1316. [PMID: 37317291 DOI: 10.3390/microorganisms11051316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 05/10/2023] [Accepted: 05/15/2023] [Indexed: 06/16/2023] Open
Abstract
Due to the global crisis caused by the dramatic rise of drug resistance among Gram-negative bacteria, there is an urgent need for a thorough understanding of the pathogenesis of infections of such an etiology. In light of the limited availability of new antibiotics, therapies aimed at host-pathogen interactions emerge as potential treatment modalities. Thus, understanding the mechanism of pathogen recognition by the host and immune evasion appear to be the key scientific issues. Until recently, lipopolysaccharide (LPS) was recognized as a major pathogen-associated molecular pattern (PAMP) of Gram-negative bacteria. However, recently, ADP-L-glycero-β-D-manno-heptose (ADP-heptose), an intermediate carbohydrate metabolite of the LPS biosynthesis pathway, was discovered to activate the hosts' innate immunity. Therefore, ADP-heptose is regarded as a novel PAMP of Gram-negative bacteria that is recognized by the cytosolic alpha kinase-1 (ALPK1) protein. The conservative nature of this molecule makes it an intriguing player in host-pathogen interactions, especially in the context of changes in LPS structure or even in its loss by certain resistant pathogens. Here, we present the ADP-heptose metabolism, outline the mechanisms of its recognition and the activation of its immunity, and summarize the role of ADP-heptose in the pathogenesis of infection. Finally, we hypothesize about the routes of the entry of this sugar into cytosol and point to emerging questions that require further research.
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Affiliation(s)
- Karolina Sidor
- Department of Translational Immunology and Experimental Intensive Care, Centre of Postgraduate Medical Education, Marymoncka 99/103, 01-813 Warsaw, Poland
| | - Tomasz Skirecki
- Department of Translational Immunology and Experimental Intensive Care, Centre of Postgraduate Medical Education, Marymoncka 99/103, 01-813 Warsaw, Poland
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7
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García-Weber D, Dangeard AS, Teixeira V, Hauke M, Carreaux A, Josenhans C, Arrieumerlou C. In vitro kinase assay reveals ADP-heptose-dependent ALPK1 autophosphorylation and altered kinase activity of disease-associated ALPK1 mutants. Sci Rep 2023; 13:6278. [PMID: 37072480 PMCID: PMC10113258 DOI: 10.1038/s41598-023-33459-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 04/13/2023] [Indexed: 05/03/2023] Open
Abstract
Alpha-protein kinase 1 (ALPK1) is a pathogen recognition receptor that detects ADP-heptose (ADPH), a lipopolysaccharide biosynthesis intermediate, recently described as a pathogen-associated molecular pattern in Gram-negative bacteria. ADPH binding to ALPK1 activates its kinase domain and triggers TIFA phosphorylation on threonine 9. This leads to the assembly of large TIFA oligomers called TIFAsomes, activation of NF-κB and pro-inflammatory gene expression. Furthermore, mutations in ALPK1 are associated with inflammatory syndromes and cancers. While this kinase is of increasing medical interest, its activity in infectious or non-infectious diseases remains poorly characterized. Here, we use a non-radioactive ALPK1 in vitro kinase assay based on the use of ATPγS and protein thiophosphorylation. We confirm that ALPK1 phosphorylates TIFA T9 and show that T2, T12 and T19 are also weakly phosphorylated by ALPK1. Interestingly, we find that ALPK1 itself is phosphorylated in response to ADPH recognition during Shigella flexneri and Helicobacter pylori infection and that disease-associated ALPK1 mutants exhibit altered kinase activity. In particular, T237M and V1092A mutations associated with ROSAH syndrome and spiradenoma/spiradenocarcinoma respectively, exhibit enhanced ADPH-induced kinase activity and constitutive assembly of TIFAsomes. Altogether, this study provides new insights into the ADPH sensing pathway and disease-associated ALPK1 mutants.
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Affiliation(s)
- Diego García-Weber
- Université Paris Cité, CNRS, INSERM, Institut Cochin, 75014, Paris, France
| | | | - Veronica Teixeira
- Université Paris Cité, CNRS, INSERM, Institut Cochin, 75014, Paris, France
| | - Martina Hauke
- Max von Pettenkofer Institute, Ludwig Maximilians Universität München, Pettenkoferstrasse 9a, 80336, Munich, Germany
| | - Alexis Carreaux
- Université Paris Cité, CNRS, INSERM, Institut Cochin, 75014, Paris, France
| | - Christine Josenhans
- Max von Pettenkofer Institute, Ludwig Maximilians Universität München, Pettenkoferstrasse 9a, 80336, Munich, Germany
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8
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Innate immune activation and modulatory factors of Helicobacter pylori towards phagocytic and nonphagocytic cells. Curr Opin Immunol 2023; 82:102301. [PMID: 36933362 DOI: 10.1016/j.coi.2023.102301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 02/17/2023] [Indexed: 03/18/2023]
Abstract
Helicobacter pylori is an intriguing obligate host-associated human pathogen with a specific host interaction biology, which has been shaped by thousands of years of host-pathogen coevolution. Molecular mechanisms of interaction of H. pylori with the local immune cells in the human system are less well defined than epithelial cell interactions, although various myeloid cells, including neutrophils and other phagocytes, are locally present or attracted to the sites of infection and interact with H. pylori. We have recently addressed the question of novel bacterial innate immune stimuli, including bacterial cell envelope metabolites, that can activate and modulate cell responses via the H. pylori Cag type IV secretion system. This review article gives an overview of what is currently known about the interaction modes and mechanisms of H. pylori with diverse human cell types, with a focus on bacterial metabolites and cells of the myeloid lineage including phagocytic and antigen-presenting cells.
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9
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Liu X, Zhao J, Jiang H, Guo H, Li Y, Li H, Feng Y, Ke J, Long X. ALPK1 Accelerates the Pathogenesis of Osteoarthritis by Activating NLRP3 Signaling. J Bone Miner Res 2022; 37:1973-1985. [PMID: 36053817 DOI: 10.1002/jbmr.4669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 07/14/2022] [Accepted: 07/31/2022] [Indexed: 11/08/2022]
Abstract
Alpha-kinase 1 (ALPK1), a member of the alpha-kinase family, has been shown to be involved in mediating inflammatory responses and is strongly associated with gout; however, its modulatory role in osteoarthritis (OA) remains unclear. Here, we uncovered elevation of ALPK1 in degraded cartilage of destabilized medial meniscus (DMM) and collagenase-induced osteoarthritis (CIOA), two different mouse OA models induced by mechanical stress or synovitis. Intraarticular administration of recombinant human ALPK1 (rhALPK1) in vivo exacerbated OA pathogenesis in both DMM and CIOA mice, whereas ALPK1 knockout reversed this process. In vitro study demonstrated that ALPK1 aggravates metabolic disturbances in chondrocytes by enhancing the production of NOD-like receptor protein 3 (NLRP3), an inflammasome sensors driving interlukin-1β (IL-1β)-mediated inflammatory conditions. Furthermore, the selective inhibition of nuclear factor-κB (NF-κB) or NLRP3 indicates that NLRP3 is a downstream signaling governed by NF-κB in ALPK1-activated chondrocytes. Collectively, these results establish ALPK1 as a novel catabolic regulator of OA pathogenesis, and targeting this signaling may be a promising treatment strategy for OA. © 2022 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Xin Liu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Jie Zhao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Henghua Jiang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Huilin Guo
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Yingjie Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Huimin Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Yaping Feng
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Jin Ke
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China.,Department of Oral and Maxillofacial Surgery, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Xing Long
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China.,Department of Oral and Maxillofacial Surgery, School & Hospital of Stomatology, Wuhan University, Wuhan, China
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10
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Kozycki CT, Kodati S, Huryn L, Wang H, Warner BM, Jani P, Hammoud D, Abu-Asab MS, Jittayasothorn Y, Mattapallil MJ, Tsai WL, Ullah E, Zhou P, Tian X, Soldatos A, Moutsopoulos N, Kao-Hsieh M, Heller T, Cowen EW, Lee CCR, Toro C, Kalsi S, Khavandgar Z, Baer A, Beach M, Long Priel D, Nehrebecky M, Rosenzweig S, Romeo T, Deuitch N, Brenchley L, Pelayo E, Zein W, Sen N, Yang AH, Farley G, Sweetser DA, Briere L, Yang J, de Oliveira Poswar F, Schwartz IVD, Silva Alves T, Dusser P, Koné-Paut I, Touitou I, Titah SM, van Hagen PM, van Wijck RTA, van der Spek PJ, Yano H, Benneche A, Apalset EM, Jansson RW, Caspi RR, Kuhns DB, Gadina M, Takada H, Ida H, Nishikomori R, Verrecchia E, Sangiorgi E, Manna R, Brooks BP, Sobrin L, Hufnagel RB, Beck D, Shao F, Ombrello AK, Aksentijevich I, Kastner DL. Gain-of-function mutations in ALPK1 cause an NF-κB-mediated autoinflammatory disease: functional assessment, clinical phenotyping and disease course of patients with ROSAH syndrome. Ann Rheum Dis 2022; 81:1453-1464. [PMID: 35868845 PMCID: PMC9484401 DOI: 10.1136/annrheumdis-2022-222629] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 06/06/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVES To test the hypothesis that ROSAH (retinal dystrophy, optic nerve oedema, splenomegaly, anhidrosis and headache) syndrome, caused by dominant mutation in ALPK1, is an autoinflammatory disease. METHODS This cohort study systematically evaluated 27 patients with ROSAH syndrome for inflammatory features and investigated the effect of ALPK1 mutations on immune signalling. Clinical, immunologic and radiographical examinations were performed, and 10 patients were empirically initiated on anticytokine therapy and monitored. Exome sequencing was used to identify a new pathogenic variant. Cytokine profiling, transcriptomics, immunoblotting and knock-in mice were used to assess the impact of ALPK1 mutations on protein function and immune signalling. RESULTS The majority of the cohort carried the p.Thr237Met mutation but we also identified a new ROSAH-associated mutation, p.Tyr254Cys.Nearly all patients exhibited at least one feature consistent with inflammation including recurrent fever, headaches with meningeal enhancement and premature basal ganglia/brainstem mineralisation on MRI, deforming arthritis and AA amyloidosis. However, there was significant phenotypic variation, even within families and some adults lacked functional visual deficits. While anti-TNF and anti-IL-1 therapies suppressed systemic inflammation and improved quality of life, anti-IL-6 (tocilizumab) was the only anticytokine therapy that improved intraocular inflammation (two of two patients).Patients' primary samples and in vitro assays with mutated ALPK1 constructs showed immune activation with increased NF-κB signalling, STAT1 phosphorylation and interferon gene expression signature. Knock-in mice with the Alpk1 T237M mutation exhibited subclinical inflammation.Clinical features not conventionally attributed to inflammation were also common in the cohort and included short dental roots, enamel defects and decreased salivary flow. CONCLUSION ROSAH syndrome is an autoinflammatory disease caused by gain-of-function mutations in ALPK1 and some features of disease are amenable to immunomodulatory therapy.
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Affiliation(s)
- Christina Torres Kozycki
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
- National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, USA
| | | | | | - Hongying Wang
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Blake M Warner
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Priyam Jani
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Dima Hammoud
- Radiology and Imaging Sciences, National Institutes of Health Clinical Center, Bethesda, Maryland, USA
| | - Mones S Abu-Asab
- Section of Histopathology, National Eye Institute, Bethesda, Maryland, USA
| | | | | | - Wanxia Li Tsai
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, Maryland, USA
| | - Ehsan Ullah
- Ophthalmic Genetics & Visual Function Branch, National Eye Institute, Bethesda, Maryland, USA
| | - Ping Zhou
- National Institute of Biological Sciences Beijing, Beijing, China
| | - Xiaoying Tian
- National Institute of Biological Sciences Beijing, Beijing, China
| | - Ariane Soldatos
- National Institute of Neurological Disorders and Stroke, Bethesda, Maryland, USA
| | - Niki Moutsopoulos
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Marie Kao-Hsieh
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Theo Heller
- National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Edward W Cowen
- Dermatology Branch, NIH, National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, Maryland, USA
| | | | - Camilo Toro
- Undiagnosed Diseases Program, Bethesda, Maryland, USA
- National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Shelley Kalsi
- National Heart Lung and Blood Institute, Bethesda, Maryland, USA
| | - Zohreh Khavandgar
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Alan Baer
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Margaret Beach
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Debra Long Priel
- Neutrophil Monitoring Laboratory, Applied/Developmental Research Directorate, Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA
| | - Michele Nehrebecky
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Sofia Rosenzweig
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Tina Romeo
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Natalie Deuitch
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
- Oncogenesis and Development Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Laurie Brenchley
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Eileen Pelayo
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Wadih Zein
- National Eye Institute, Bethesda, Maryland, USA
| | - Nida Sen
- National Eye Institute, Bethesda, Maryland, USA
| | - Alexander H Yang
- National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Gary Farley
- Drs. Gilbert and Farley, OD, PC, Colonial Heights, Virginia, USA
| | - David A Sweetser
- Massachusetts General Hospital Center for Genomic Medicine, Boston, Massachusetts, USA
- Division of Medical Genetics & Metabolism, Department of Pediatrics, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Lauren Briere
- Massachusetts General Hospital Center for Genomic Medicine, Boston, Massachusetts, USA
| | - Janine Yang
- Massachusetts Eye and Ear, Boston, Massachusetts, USA
| | - Fabiano de Oliveira Poswar
- Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
- Post Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Ida Vanessa D Schwartz
- Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
- Post Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Perrine Dusser
- Service de Rhumatologie Pédiatrique, Centre de Référence des Maladies Auto-Inflammatoires de l'enfant, Hôpital Bicêtre, AP HP, Université Paris Sud, Bicetre, France
| | - Isabelle Koné-Paut
- Service de Rhumatologie Pédiatrique, Centre de Référence des Maladies Auto-Inflammatoires et de l'amylose inflammatoire CEREMAIA, Hôpital Bicêtre, AP HP, Université Paris Saclay, Bicetre, France
| | - Isabelle Touitou
- CeRéMAIA, CHU Montpellier, INSERM, University of Montpellier, Montpellier, France
| | | | | | | | | | | | - Andreas Benneche
- Department of Medical Genetics, Haukeland University Hospital, Bergen, Norway
| | - Ellen M Apalset
- Bergen Group of Epidemiology and Biomarkers in Rheumatic Disease, Department of Rheumatology, Haukeland University Hospital, Bergen, Norway
| | | | - Rachel R Caspi
- Laboratory of Immunology, National Eye Institute, NIH, Bethesda, Maryland, USA
| | - Douglas Byron Kuhns
- Neutrophil Monitoring Laboratory, Applied/Developmental Research Directorate, Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA
| | - Massimo Gadina
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, Maryland, USA
| | - Hidetoshi Takada
- Department of Child Health, University of Tsukuba Faculty of Medicine, Tsukuba, Japan
| | - Hiroaki Ida
- Division of Respirology, Neurology, and Rheumatology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Ryuta Nishikomori
- Department of Pediatrics and Child Health, Kurume University School of Medicine, Kurume, Japan
| | - Elena Verrecchia
- Department of Internal Medicine, Periodic Fevers Research Center, Università Cattolica del Sacro Cuore, Roma, Italy
- Dipartimento di scienze dell'invecchiamento, neurologiche, ortopediche e della testa-collo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Roma, Italy
| | - Eugenio Sangiorgi
- Istitute of Genomic di Medicine, Universita Cattolica del Sacro Cuore, Roma, Italy
| | - Raffaele Manna
- Department of Internal Medicine, Periodic Fevers Research Center, Università Cattolica del Sacro Cuore, Roma, Italy
| | - Brian P Brooks
- Ophthalmic Genetics & Visual Function Branch, National Eye Institute, Bethesda, Maryland, USA
| | - Lucia Sobrin
- Massachusetts Eye and Ear, Boston, Massachusetts, USA
| | - Robert B Hufnagel
- Ophthalmic Genetics & Visual Function Branch, National Eye Institute, Bethesda, Maryland, USA
| | | | - Feng Shao
- National Institute of Biological Sciences Beijing, Beijing, China
| | - Amanda K Ombrello
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Ivona Aksentijevich
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Daniel L Kastner
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
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11
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Martin-Gallausiaux C, Garcia-Weber D, Lashermes A, Larraufie P, Marinelli L, Teixeira V, Rolland A, Béguet-Crespel F, Brochard V, Quatremare T, Jamet A, Doré J, Gray-Owen SD, Blottière HM, Arrieumerlou C, Lapaque N. Akkermansia muciniphila upregulates genes involved in maintaining the intestinal barrier function via ADP-heptose-dependent activation of the ALPK1/TIFA pathway. Gut Microbes 2022; 14:2110639. [PMID: 36036242 PMCID: PMC9427033 DOI: 10.1080/19490976.2022.2110639] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The commensal bacteria that make up the gut microbiota impact the health of their host on multiple levels. In particular, the interactions taking place between the microbe-associated molecule patterns (MAMPs) and pattern recognition receptors (PRRs), expressed by intestinal epithelial cells (IECs), are crucial for maintaining intestinal homeostasis. While numerous studies showed that TLRs and NLRs are involved in the control of gut homeostasis by commensal bacteria, the role of additional innate immune receptors remains unclear. Here, we seek for novel MAMP-PRR interactions involved in the beneficial effect of the commensal bacterium Akkermansia muciniphila on intestinal homeostasis. We show that A. muciniphila strongly activates NF-κB in IECs by releasing one or more potent activating metabolites into the microenvironment. By using drugs, chemical and gene-editing tools, we found that the released metabolite(s) enter(s) epithelial cells and activate(s) NF-κB via an ALPK1, TIFA and TRAF6-dependent pathway. Furthermore, we show that the released molecule has the biological characteristics of the ALPK1 ligand ADP-heptose. Finally, we show that A. muciniphila induces the expression of the MUC2, BIRC3 and TNFAIP3 genes involved in the maintenance of the intestinal barrier function and that this process is dependent on TIFA. Altogether, our data strongly suggest that the commensal A. muciniphila promotes intestinal homeostasis by activating the ALPK1/TIFA/TRAF6 axis, an innate immune pathway exclusively described so far in the context of Gram-negative bacterial infections.
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Affiliation(s)
| | | | - Amandine Lashermes
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Pierre Larraufie
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Ludovica Marinelli
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Veronica Teixeira
- INSERM, Institut Cochin, Université de Paris Cité, CNRS, Paris, France
| | - Alice Rolland
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | | | - Vincent Brochard
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Timothé Quatremare
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Alexandre Jamet
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Joël Doré
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Scott D. Gray-Owen
- Department of Molecular Genetics, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Hervé M. Blottière
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | | | - Nicolas Lapaque
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, Jouy-en-Josas, France,CONTACT Nicolas Lapaque INRAE-MICALIS UMR1319, Bat 442, Domaine de Vilvert78350Jouy-en-Josas, France
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12
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Holmes CL, Smith SN, Gurczynski SJ, Severin GB, Unverdorben LV, Vornhagen J, Mobley HLT, Bachman MA. The ADP-Heptose Biosynthesis Enzyme GmhB is a Conserved Gram-Negative Bacteremia Fitness Factor. Infect Immun 2022; 90:e0022422. [PMID: 35762751 PMCID: PMC9302095 DOI: 10.1128/iai.00224-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 06/12/2022] [Indexed: 11/29/2022] Open
Abstract
Klebsiella pneumoniae is a leading cause of Gram-negative bacteremia, which is a major source of morbidity and mortality worldwide. Gram-negative bacteremia requires three major steps: primary site infection, dissemination to the blood, and bloodstream survival. Because K. pneumoniae is a leading cause of health care-associated pneumonia, the lung is a common primary infection site leading to secondary bacteremia. K. pneumoniae factors essential for lung fitness have been characterized, but those required for subsequent bloodstream infection are unclear. To identify K. pneumoniae genes associated with dissemination and bloodstream survival, we combined previously and newly analyzed insertion site sequencing (InSeq) data from a murine model of bacteremic pneumonia. This analysis revealed the gene gmhB as important for either dissemination from the lung or bloodstream survival. In Escherichia coli, GmhB is a partially redundant enzyme in the synthesis of ADP-heptose for the lipopolysaccharide (LPS) core. To characterize its function in K. pneumoniae, an isogenic knockout strain (ΔgmhB) and complemented mutant were generated. During pneumonia, GmhB did not contribute to lung fitness and did not alter normal immune responses. However, GmhB enhanced bloodstream survival in a manner independent of serum susceptibility, specifically conveying resistance to spleen-mediated killing. In a tail-vein injection of murine bacteremia, GmhB was also required by K. pneumoniae, E. coli, and Citrobacter freundii for optimal fitness in the spleen and liver. Together, this study identifies GmhB as a conserved Gram-negative bacteremia fitness factor that acts through LPS-mediated mechanisms to enhance fitness in blood-filtering organs.
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Affiliation(s)
- Caitlyn L. Holmes
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Sara N. Smith
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Stephen J. Gurczynski
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Geoffrey B. Severin
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Lavinia V. Unverdorben
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Jay Vornhagen
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Harry L. T. Mobley
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Michael A. Bachman
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
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13
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Nasser A, Mosadegh M, Azimi T, Shariati A. Molecular mechanisms of Shigella effector proteins: a common pathogen among diarrheic pediatric population. Mol Cell Pediatr 2022; 9:12. [PMID: 35718793 PMCID: PMC9207015 DOI: 10.1186/s40348-022-00145-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 05/06/2022] [Indexed: 12/16/2022] Open
Abstract
Different gastrointestinal pathogens cause diarrhea which is a very common problem in children aged under 5 years. Among bacterial pathogens, Shigella is one of the main causes of diarrhea among children, and it accounts for approximately 11% of all deaths among children aged under 5 years. The case-fatality rates for Shigella among the infants and children aged 1 to 4 years are 13.9% and 9.4%, respectively. Shigella uses unique effector proteins to modulate intracellular pathways. Shigella cannot invade epithelial cells on the apical site; therefore, it needs to pass epithelium through other cells rather than the epithelial cell. After passing epithelium, macrophage swallows Shigella, and the latter should prepare itself to exhibit at least two types of responses: (I) escaping phagocyte and (II) mediating invasion of and injury to the recurrent PMN. The presence of PMN and invitation to a greater degree resulted in gut membrane injuries and greater bacterial penetration. Infiltration of Shigella to the basolateral space mediates (A) cell attachment, (B) cell entry, (C) evasion of autophagy recognition, (D) vacuole formation and and vacuole rapture, (E) intracellular life, (F) Shiga toxin, and (G) immune response. In this review, an attempt is made to explain the role of each factor in Shigella infection.
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Affiliation(s)
- Ahmad Nasser
- Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehrdad Mosadegh
- Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Taher Azimi
- Department of Bacteriology & Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Aref Shariati
- Molecular and medicine research center, Khomein University of Medical Sciences, Khomein, Iran
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14
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High-Throughput CRISPR Screens To Dissect Macrophage- Shigella Interactions. mBio 2021; 12:e0215821. [PMID: 34933448 PMCID: PMC8689513 DOI: 10.1128/mbio.02158-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Shigellosis causes most diarrheal deaths worldwide, particularly affecting children. Shigella invades and replicates in the epithelium of the large intestine, eliciting inflammation and tissue destruction. To understand how Shigella rewires macrophages prior to epithelium invasion, we performed genome-wide and focused secondary CRISPR knockout and CRISPR interference (CRISPRi) screens in Shigella flexneri-infected human monocytic THP-1 cells. Knockdown of the Toll-like receptor 1/2 signaling pathway significantly reduced proinflammatory cytokine and chemokine production, enhanced host cell survival, and controlled intracellular pathogen growth. Knockdown of the enzymatic component of the mitochondrial pyruvate dehydrogenase complex enhanced THP-1 cell survival. Small-molecule inhibitors blocking key components of these pathways had similar effects; these were validated with human monocyte-derived macrophages, which closely mimic the in vivo physiological state of macrophages postinfection. High-throughput CRISPR screens can elucidate how S. flexneri triggers inflammation and redirects host pyruvate catabolism for energy acquisition before killing macrophages, pointing to new shigellosis therapies.
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15
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Nie JJ, Pian YY, Hu JH, Fan GQ, Zeng LT, Ouyang QG, Gao ZX, Liu Z, Wang CC, Liu Q, Cai JP. Increased systemic RNA oxidative damage and diagnostic value of RNA oxidative metabolites during Shigella flexneri-induced intestinal infection. World J Gastroenterol 2021; 27:6248-6261. [PMID: 34712030 PMCID: PMC8515791 DOI: 10.3748/wjg.v27.i37.6248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/29/2021] [Accepted: 08/09/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Shigella flexneri (S. flexneri) is a major pathogen causing acute intestinal infection, but the systematic oxidative damage incurred during the course of infection has not been investigated.
AIM To investigate the incurred systemic RNA oxidative damage and the diagnostic value of RNA oxidative metabolites during S. flexneri-induced intestinal infection.
METHODS In this study, a Sprague-Dawley rat model of acute intestinal infection was established by oral gavage with S. flexneri strains. The changes in white blood cells (WBCs) and cytokine levels in blood and the inflammatory response in the colon were investigated. We also detected the RNA and DNA oxidation in urine and tissues.
RESULTS S. flexneri infection induced an increase in WBCs, C-reactive protein, interleukin (IL)-6, IL-10, IL-1β, IL-4, IL-17a, IL-10, and tumor necrosis factor α (TNF-α) in blood. Of note, a significant increase in urinary 8-oxo-7,8-dihydroguanosine (8-oxo-Gsn), an important marker of total RNA oxidation, was detected after intestinal infection (P = 0.03). The urinary 8-oxo-Gsn level returned to the baseline level after recovery from infection. In addition, the results of a correlation analysis showed that urinary 8-oxo-Gsn was positively correlated with the WBC count and the cytokines IL-6, TNF-α, IL-10, IL-1β, and IL-17α. Further detection of the oxidation in different tissues showed that S. flexneri infection induced RNA oxidative damage in the colon, ileum, liver, spleen, and brain.
CONCLUSION Acute infection induced by S. flexneri causes increased RNA oxidative damage in various tissues (liver, spleen, and brain) and an increase of 8-oxo-Gsn, a urinary metabolite. Urinary 8-oxo-Gsn may be useful as a biomarker for evaluating the severity and prognosis of infection.
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Affiliation(s)
- Jing-Jing Nie
- Department of Microbiology, National Center for Clinical Laboratories, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Ya-Ya Pian
- Department of Microbiology, National Center for Clinical Laboratories, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Ji-Hong Hu
- Department of Microbiology, National Center for Clinical Laboratories, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Guo-Qing Fan
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Lv-Tao Zeng
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Qiu-Geng Ouyang
- Department of Pharmacy, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, China
| | - Zhen-Xiang Gao
- Department of Microbiology, National Center for Clinical Laboratories, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Zhen Liu
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Chen-Chen Wang
- Department of Pharmacy, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, China
| | - Qian Liu
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Jian-Ping Cai
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China
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16
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Extraction of ADP-Heptose and Kdo2-Lipid A from E. coli Deficient in the Heptosyltransferase I Gene. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11188314] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The enzymes involved in lipopolysaccharide (LPS) biosynthesis, including Heptosyltransferase I (HepI), are critical for maintaining the integrity of the bacterial cell wall, and therefore these LPS biosynthetic enzymes are validated targets for drug discovery to treat Gram-negative bacterial infections. Enzymes involved in the biosynthesis of lipopolysaccharides (LPSs) utilize substrates that are synthetically complex, with numerous stereocenters and site-specific glycosylation patterns. Due to the relatively complex substrate structures, characterization of these enzymes has necessitated strategies to generate bacterial cells with gene disruptions to enable the extraction of these substrates from large scale bacterial growths. Like many LPS biosynthetic enzymes, Heptosyltransferase I binds two substrates: the sugar acceptor substrate, Kdo2-Lipid A, and the sugar donor substrate, ADP-l-glycero-d-manno-heptose (ADPH). HepI characterization experiments require copious amounts of Kdo2-Lipid A and ADPH, and unsuccessful extractions of these two substrates can lead to serious delays in collection of data. While there are papers and theses with protocols for extraction of these substrates, they are often missing small details essential to the success of the extraction. Herein detailed protocols are given for extraction of ADPH and Kdo2-Lipid A (KLA) from E. coli, which have had proven success in the Taylor lab. Key steps in the extraction of ADPH are clearing the extract through ultracentrifugation and keeping all water that touches anything in the extraction, including filters, at a pH of 8.0. Key steps in the extraction of KLA are properly lysing the dried down cells before starting the extraction, maximizing yield by allowing precipitate to form overnight, appropriately washing the pellet with phenol and dissolving the KLA in 1% TEA using visual cues, rather than a specific volume. These protocols led to increased yield and a higher success rate of extractions thereby enabling the characterization of HepI.
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17
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The ALPK1 pathway drives the inflammatory response to Campylobacter jejuni in human intestinal epithelial cells. PLoS Pathog 2021; 17:e1009787. [PMID: 34339468 PMCID: PMC8360561 DOI: 10.1371/journal.ppat.1009787] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 08/12/2021] [Accepted: 07/06/2021] [Indexed: 12/18/2022] Open
Abstract
The Gram-negative bacterium Campylobacter jejuni is a major cause of foodborne disease in humans. After infection, C. jejuni rapidly colonizes the mucus layer of the small and large intestine and induces a potent pro-inflammatory response characterized by the production of a large repertoire of cytokines, chemokines, and innate effector molecules, resulting in (bloody) diarrhea. The virulence mechanisms by which C. jejuni causes this intestinal response are still largely unknown. Here we show that C. jejuni releases a potent pro-inflammatory compound into its environment, which activates an NF-κB-mediated pro-inflammatory response including the induction of CXCL8, CXCL2, TNFAIP2 and PTGS2. This response was dependent on a functional ALPK1 receptor and independent of Toll-like Receptor and Nod-like Receptor signaling. Chemical characterization, inactivation of the heptose-biosynthesis pathway by the deletion of the hldE gene and in vitro engineering identified the released factor as the LOS-intermediate ADP-heptose and/or related heptose phosphates. During C. jejuni infection of intestinal cells, the ALPK1-NF-κB axis was potently activated by released heptose metabolites without the need for a type III or type IV injection machinery. Our results classify ADP-heptose and/or related heptose phosphates as a major virulence factor of C. jejuni that may play an important role during Campylobacter infection in humans.
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18
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Coletta S, Battaggia G, Della Bella C, Furlani M, Hauke M, Faass L, D'Elios MM, Josenhans C, de Bernard M. ADP-heptose enables Helicobacter pylori to exploit macrophages as a survival niche by suppressing antigen-presenting HLA-II expression. FEBS Lett 2021; 595:2160-2168. [PMID: 34216493 DOI: 10.1002/1873-3468.14156] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 06/30/2021] [Accepted: 06/30/2021] [Indexed: 12/15/2022]
Abstract
The persistence of Helicobacter pylori in the human gastric mucosa implies that the immune response fails to clear the infection. We found that H. pylori compromises the antigen presentation ability of macrophages, because of the decline of the presenting molecules HLA-II. Here, we reveal that the main bacterial factor responsible for this effect is ADP-heptose, an intermediate metabolite in the biosynthetic pathway of lipopolysaccharide (LPS) that elicits a pro-inflammatory response in gastric epithelial cells. In macrophages, it upregulates the expression of miR146b which, in turn, would downmodulate CIITA, the master regulator for HLA-II genes. Hence, H. pylori, utilizing ADP-heptose, exploits a specific arm of macrophage response to establish its survival niche in the face of the immune defense elicited in the gastric mucosa.
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Affiliation(s)
- Sara Coletta
- Department of Biology, University of Padova, Italy
| | | | - Chiara Della Bella
- Department of Experimental and Clinical Medicine, University of Florence, Italy
| | | | - Martina Hauke
- Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, LMU Munich, Germany
| | - Larissa Faass
- Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, LMU Munich, Germany
| | - Mario M D'Elios
- Department of Experimental and Clinical Medicine, University of Florence, Italy
| | - Christine Josenhans
- Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, LMU Munich, Germany
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19
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Maubach G, Lim MCC, Sokolova O, Backert S, Meyer TF, Naumann M. TIFA has dual functions in Helicobacter pylori-induced classical and alternative NF-κB pathways. EMBO Rep 2021; 22:e52878. [PMID: 34328245 PMCID: PMC8419686 DOI: 10.15252/embr.202152878] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 07/04/2021] [Accepted: 07/09/2021] [Indexed: 11/21/2022] Open
Abstract
Helicobacter pylori infection constitutes one of the major risk factors for the development of gastric diseases including gastric cancer. The activation of nuclear factor‐kappa‐light‐chain‐enhancer of activated B cells (NF‐κB) via classical and alternative pathways is a hallmark of H. pylori infection leading to inflammation in gastric epithelial cells. Tumor necrosis factor receptor‐associated factor (TRAF)‐interacting protein with forkhead‐associated domain (TIFA) was previously suggested to trigger classical NF‐κB activation, but its role in alternative NF‐κB activation remains unexplored. Here, we identify TRAF6 and TRAF2 as binding partners of TIFA, contributing to the formation of TIFAsomes upon H. pylori infection. Importantly, the TIFA/TRAF6 interaction enables binding of TGFβ‐activated kinase 1 (TAK1), leading to the activation of classical NF‐κB signaling, while the TIFA/TRAF2 interaction causes the transient displacement of cellular inhibitor of apoptosis 1 (cIAP1) from TRAF2, and proteasomal degradation of cIAP1, to facilitate the activation of the alternative NF‐κB pathway. Our findings therefore establish a dual function of TIFA in the activation of classical and alternative NF‐κB signaling in H. pylori‐infected gastric epithelial cells.
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Affiliation(s)
- Gunter Maubach
- Institute of Experimental Internal Medicine, Medical Faculty, Otto von Guericke University, Magdeburg, Germany
| | - Michelle C C Lim
- Institute of Experimental Internal Medicine, Medical Faculty, Otto von Guericke University, Magdeburg, Germany
| | - Olga Sokolova
- Institute of Experimental Internal Medicine, Medical Faculty, Otto von Guericke University, Magdeburg, Germany
| | - Steffen Backert
- Division of Microbiology, Department of Biology, Friedrich Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Thomas F Meyer
- Department of Molecular Biology, Max-Planck Institute for Infection Biology, Berlin, Germany.,Laboratory of Infection Oncology, Institute of Clinical Molecular Biology, Christian Albrechts University of Kiel and University Hospital Schleswig Holstein, Kiel, Germany
| | - Michael Naumann
- Institute of Experimental Internal Medicine, Medical Faculty, Otto von Guericke University, Magdeburg, Germany
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20
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Yang DX, Yang H, Cao YC, Jiang M, Zheng J, Peng B. Succinate Promotes Phagocytosis of Monocytes/Macrophages in Teleost Fish. Front Mol Biosci 2021; 8:644957. [PMID: 33937328 PMCID: PMC8082191 DOI: 10.3389/fmolb.2021.644957] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 03/26/2021] [Indexed: 12/14/2022] Open
Abstract
Development of immunity-based strategy to manage bacterial infection is urgently needed in aquaculture due to the widespread of antibiotic-resistant bacteria. Phagocytosis serves as the first line defense in innate immunity that engulfs bacteria and restricts their proliferations and invasions. However, the mechanism underlying the regulation of phagocytosis is not fully elucidated and the way to boost phagocytosis is not yet explored. In this manuscript, we profiled the metabolomes of monocytes/macrophages isolated from Nile tilapia, prior and after phagocytosis on Vibrio alginolyticus. Monocytes/macrophages showed a metabolic shift following phagocytosis. Interestingly, succinate was accumulated after phagocytosis and was identified as a crucial biomarker to distinguish before and after phagocytosis. Exogenous succinate increased the phagocytotic rate of monocytes/macrophages in a dose-dependent manner. This effect was dependent on the TCA cycle as the inhibitor of malonate that targets succinate dehydrogenase abrogated the effect. Meanwhile, exogenous succinate regulated the expression of genes associated with innate immune and phagocytosis. In addition, succinate-potentiated phagocytosis was applicable to both gram-negative and -positive cells, including V. alginolyticus, Edwardsiella tarda, Streptococcus agalactiae, and Streptococcus iniae. Our study shed light on the understanding of how modulation on host's metabolism regulates immune response, and this can be a potent therapeutic approach to control bacterial infections in aquaculture.
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Affiliation(s)
- Dai-Xiao Yang
- Center for Proteomics and Metabolomics, State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Hao Yang
- Center for Proteomics and Metabolomics, State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Yun-Chao Cao
- Center for Proteomics and Metabolomics, State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Ming Jiang
- Center for Proteomics and Metabolomics, State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Jun Zheng
- Faculty of Health Sciences, University of Macau, Macau, China
| | - Bo Peng
- Center for Proteomics and Metabolomics, State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, Guangzhou, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
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21
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Li T, Tikad A, Fu H, Milicaj J, Castro CD, Lacritick M, Pan W, Taylor EA, Vincent SP. A General Strategy to Synthesize ADP-7-Azido-heptose and ADP-Azido-mannoses and Their Heptosyltransferase Binding Properties. Org Lett 2021; 23:1638-1642. [DOI: 10.1021/acs.orglett.1c00048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Tianlei Li
- University of Namur, Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, B-5000 Namur, Belgium
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, 100005, China
| | - Abdellatif Tikad
- University of Namur, Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, B-5000 Namur, Belgium
- Laboratoire de Chimie Moléculaire et Substances Naturelles, Faculté des Sciences, Université Moulay Ismail, B.P. 11201, Zitoune, Meknès, Morocco
| | - Huixiao Fu
- University of Namur, Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, B-5000 Namur, Belgium
| | - Jozafina Milicaj
- Department of Chemistry, Wesleyan University, Middletown, Connecticut 06459, United States
| | - Colleen D. Castro
- Department of Chemistry, Wesleyan University, Middletown, Connecticut 06459, United States
| | - Marine Lacritick
- University of Namur, Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, B-5000 Namur, Belgium
| | - Weidong Pan
- State Key Laboratory for Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
| | - Erika A. Taylor
- Department of Chemistry, Wesleyan University, Middletown, Connecticut 06459, United States
| | - Stéphane P. Vincent
- University of Namur, Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, B-5000 Namur, Belgium
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22
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García-Weber D, Arrieumerlou C. ADP-heptose: a bacterial PAMP detected by the host sensor ALPK1. Cell Mol Life Sci 2021; 78:17-29. [PMID: 32591860 PMCID: PMC11072087 DOI: 10.1007/s00018-020-03577-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 01/16/2023]
Abstract
The innate immune response constitutes the first line of defense against pathogens. It involves the recognition of pathogen-associated molecular patterns (PAMPs) by pathogen recognition receptors (PRRs), the production of inflammatory cytokines and the recruitment of immune cells to infection sites. Recently, ADP-heptose, a soluble intermediate of the lipopolysaccharide biosynthetic pathway in Gram-negative bacteria, has been identified by several research groups as a PAMP. Here, we recapitulate the evidence that led to this identification and discuss the controversy over the immunogenic properties of heptose 1,7-bisphosphate (HBP), another bacterial heptose previously defined as an activator of innate immunity. Then, we describe the mechanism of ADP-heptose sensing by alpha-protein kinase 1 (ALPK1) and its downstream signaling pathway that involves the proteins TIFA and TRAF6 and induces the activation of NF-κB and the secretion of inflammatory cytokines. Finally, we discuss possible delivery mechanisms of ADP-heptose in cells during infection, and propose new lines of thinking to further explore the roles of the ADP-heptose/ALPK1/TIFA axis in infections and its potential implication in the control of intestinal homeostasis.
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Affiliation(s)
- Diego García-Weber
- INSERM, U1016, Institut Cochin, CNRS, UMR8104, Université de Paris, 22 rue Méchain, 75014, Paris, France
| | - Cécile Arrieumerlou
- INSERM, U1016, Institut Cochin, CNRS, UMR8104, Université de Paris, 22 rue Méchain, 75014, Paris, France.
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23
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Schubert KA, Xu Y, Shao F, Auerbuch V. The Yersinia Type III Secretion System as a Tool for Studying Cytosolic Innate Immune Surveillance. Annu Rev Microbiol 2020; 74:221-245. [PMID: 32660389 DOI: 10.1146/annurev-micro-020518-120221] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Microbial pathogens have evolved complex mechanisms to interface with host cells in order to evade host defenses and replicate. However, mammalian innate immune receptors detect the presence of molecules unique to the microbial world or sense the activity of virulence factors, activating antimicrobial and inflammatory pathways. We focus on how studies of the major virulence factor of one group of microbial pathogens, the type III secretion system (T3SS) of human pathogenic Yersinia, have shed light on these important innate immune responses. Yersinia are largely extracellular pathogens, yet they insert T3SS cargo into target host cells that modulate the activity of cytosolic innate immune receptors. This review covers both the host pathways that detect the Yersinia T3SS and the effector proteins used by Yersinia to manipulate innate immune signaling.
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Affiliation(s)
- Katherine Andrea Schubert
- Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, Santa Cruz, California 95064, USA;
| | - Yue Xu
- National Institute of Biological Sciences, Beijing 102206, China
| | - Feng Shao
- National Institute of Biological Sciences, Beijing 102206, China
| | - Victoria Auerbuch
- Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, Santa Cruz, California 95064, USA;
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24
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Gan J, Giogha C, Hartland EL. Molecular mechanisms employed by enteric bacterial pathogens to antagonise host innate immunity. Curr Opin Microbiol 2020; 59:58-64. [PMID: 32862049 DOI: 10.1016/j.mib.2020.07.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 07/25/2020] [Accepted: 07/27/2020] [Indexed: 12/13/2022]
Abstract
Many Gram-negative enteric pathogens, including enteropathogenic and enterohemorrhagic Escherichia coli (EPEC and EHEC), Salmonella, Shigella, and Yersinia species have evolved strategies to combat host defence mechanisms. Critical bacterial virulence factors, which often include but are not limited to type III secreted effector proteins, are deployed to cooperatively interfere with key host defence pathways. Recent studies in this area have not only contributed to our knowledge of bacterial pathogenesis, but have also shed light on the host pathways that are critical for controlling bacterial infection. In this review, we summarise recent breakthroughs in our understanding of the mechanisms utilised by enteric bacterial pathogens to rewire critical host innate immune responses, including cell death and inflammatory signaling and cell-intrinsic anti-microbial responses such as xenophagy.
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Affiliation(s)
- Jiyao Gan
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Victoria, Australia; Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, Victoria, Australia
| | - Cristina Giogha
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, Victoria, Australia; Department of Molecular and Translational Science, Monash University, Clayton, Victoria, Australia
| | - Elizabeth L Hartland
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, Victoria, Australia; Department of Molecular and Translational Science, Monash University, Clayton, Victoria, Australia.
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25
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Liang L, Wade Wei T, Wu P, Herrebout W, Tsai M, Vincent SP. Nonhydrolyzable Heptose Bis‐ and Monophosphate Analogues Modulate Pro‐inflammatory TIFA‐NF‐κB Signaling. Chembiochem 2020; 21:2982-2990. [DOI: 10.1002/cbic.202000319] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Indexed: 12/12/2022]
Affiliation(s)
- Lina Liang
- University of Namur (UNamur), NARILIS Department of Chemistry rue de Bruxelles 61 5000 Namur Belgium
| | - Tong‐You Wade Wei
- Academia Sinica Institute of Biological Chemistry 128, Academia Road Section 2, Nankang 11529 Taipei Taiwan
| | - Pei‐Yu Wu
- Academia Sinica Institute of Biological Chemistry 128, Academia Road Section 2, Nankang 11529 Taipei Taiwan
| | - Wouter Herrebout
- University of Antwerp Department of Chemistry MolSpec Research group Groenenborgerlaan 171 2020 Antwerpen Belgium
| | - Ming‐Daw Tsai
- Academia Sinica Institute of Biological Chemistry 128, Academia Road Section 2, Nankang 11529 Taipei Taiwan
| | - Stéphane P. Vincent
- University of Namur (UNamur), NARILIS Department of Chemistry rue de Bruxelles 61 5000 Namur Belgium
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26
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Nakamura T, Hashikawa C, Okabe K, Yokote Y, Chirifu M, Toma-Fukai S, Nakamura N, Matsuo M, Kamikariya M, Okamoto Y, Gohda J, Akiyama T, Semba K, Ikemizu S, Otsuka M, Inoue JI, Yamagata Y. Structural analysis of TIFA: Insight into TIFA-dependent signal transduction in innate immunity. Sci Rep 2020; 10:5152. [PMID: 32198460 PMCID: PMC7083832 DOI: 10.1038/s41598-020-61972-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 03/03/2020] [Indexed: 11/28/2022] Open
Abstract
TRAF-interacting protein with a forkhead-associated (FHA) domain (TIFA), originally identified as an adaptor protein of TRAF6, has recently been shown to be involved in innate immunity, induced by a pathogen-associated molecular pattern (PAMP). ADP-β-D-manno-heptose, a newly identified PAMP, binds to alpha-kinase 1 (ALPK1) and activates its kinase activity to phosphorylate TIFA. Phosphorylation triggers TIFA oligomerisation and formation of a subsequent TIFA-TRAF6 oligomeric complex for ubiquitination of TRAF6, eventually leading to NF-κB activation. However, the structural basis of TIFA-dependent TRAF6 signalling, especially oligomer formation of the TIFA-TRAF6 complex remains unknown. In the present study, we determined the crystal structures of mouse TIFA and two TIFA mutants-Thr9 mutated to either Asp or Glu to mimic the phosphorylation state-to obtain the structural information for oligomer formation of the TIFA-TRAF6 complex. Crystal structures show the dimer formation of mouse TIFA to be similar to that of human TIFA, which was previously reported. This dimeric structure is consistent with the solution structure obtained from small angle X-ray scattering analysis. In addition to the structural analysis, we examined the molecular assembly of TIFA and the TIFA-TRAF6 complex by size-exclusion chromatography, and suggested a model for the TIFA-TRAF6 signalling complex.
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Affiliation(s)
- Teruya Nakamura
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan.
- Priority Organization for Innovation and Excellence, Kumamoto University, Kumamoto, Japan.
| | - Chie Hashikawa
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Kohtaro Okabe
- School of Pharmacy, Kumamoto University, Kumamoto, Japan
| | - Yuya Yokote
- School of Pharmacy, Kumamoto University, Kumamoto, Japan
| | - Mami Chirifu
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Sachiko Toma-Fukai
- Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Japan
| | | | - Mihoko Matsuo
- Priority Organization for Innovation and Excellence, Kumamoto University, Kumamoto, Japan
| | | | - Yoshinari Okamoto
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Jin Gohda
- Research Center for Asian Infectious Diseases, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Taishin Akiyama
- Laboratory for Immune Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Kentaro Semba
- Department of Life Science and Medical Bioscience, Waseda University, Tokyo, Japan
| | - Shinji Ikemizu
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Masami Otsuka
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Jun-Ichiro Inoue
- Research Center for Asian Infectious Diseases, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Division of Cellular and Molecular Biology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Yuriko Yamagata
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
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27
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Carson D, Barry R, Hopkins EGD, Roumeliotis TI, García-Weber D, Mullineaux-Sanders C, Elinav E, Arrieumerlou C, Choudhary JS, Frankel G. Citrobacter rodentium induces rapid and unique metabolic and inflammatory responses in mice suffering from severe disease. Cell Microbiol 2019; 22:e13126. [PMID: 31610608 PMCID: PMC7003488 DOI: 10.1111/cmi.13126] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 09/26/2019] [Indexed: 12/14/2022]
Abstract
The mouse pathogen Citrobacter rodentium is used to model infections with enterohaemorrhagic and enteropathogenic Escherichia coli (EHEC and EPEC). Pathogenesis is commonly modelled in mice developing mild disease (e.g., C57BL/6). However, little is known about host responses in mice exhibiting severe colitis (e.g., C3H/HeN), which arguably provide a more clinically relevant model for human paediatric enteric infection. Infection of C3H/HeN mice with C. rodentium results in rapid colonic colonisation, coinciding with induction of key inflammatory signatures and colonic crypt hyperplasia. Infection also induces dramatic changes to bioenergetics in intestinal epithelial cells, with transition from oxidative phosphorylation (OXPHOS) to aerobic glycolysis and higher abundance of SGLT4, LDHA, and MCT4. Concomitantly, mitochondrial proteins involved in the TCA cycle and OXPHOS were in lower abundance. Similar to observations in C57BL/6 mice, we detected simultaneous activation of cholesterol biogenesis, import, and efflux. Distinctly, however, the pattern recognition receptors NLRP3 and ALPK1 were specifically induced in C3H/HeN. Using cell‐based assays revealed that C. rodentium activates the ALPK1/TIFA axis, which is dependent on the ADP‐heptose biosynthesis pathway but independent of the Type III secretion system. This study reveals for the first time the unfolding intestinal epithelial cells' responses during severe infectious colitis, which resemble EPEC human infections.
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Affiliation(s)
- Danielle Carson
- Centre for Molecular Microbiology and Infection, Department of Life Sciences, Imperial College London, London, UK
| | - Rachael Barry
- Centre for Molecular Microbiology and Infection, Department of Life Sciences, Imperial College London, London, UK
| | - Eve G D Hopkins
- Centre for Molecular Microbiology and Infection, Department of Life Sciences, Imperial College London, London, UK
| | - Theodoros I Roumeliotis
- Functional Proteomics Group, Chester Beatty Laboratories, Institute of Cancer Research, London, UK
| | - Diego García-Weber
- Inserm U1016, Institute Cochin, Paris, France.,CNRS, UMR 8104, Paris, France.,Sorbonne Paris Cité, Université Paris Descartes, Paris, France
| | - Caroline Mullineaux-Sanders
- Centre for Molecular Microbiology and Infection, Department of Life Sciences, Imperial College London, London, UK
| | - Eran Elinav
- Department of Immunology, Weizmann Institute of Science, Rehovot, Israel
| | - Cécile Arrieumerlou
- Inserm U1016, Institute Cochin, Paris, France.,CNRS, UMR 8104, Paris, France.,Sorbonne Paris Cité, Université Paris Descartes, Paris, France
| | - Jyoti S Choudhary
- Functional Proteomics Group, Chester Beatty Laboratories, Institute of Cancer Research, London, UK
| | - Gad Frankel
- Centre for Molecular Microbiology and Infection, Department of Life Sciences, Imperial College London, London, UK
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28
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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] [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.
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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.
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29
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Maeda K, Caldez MJ, Akira S. Innate immunity in allergy. Allergy 2019; 74:1660-1674. [PMID: 30891811 PMCID: PMC6790574 DOI: 10.1111/all.13788] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 02/26/2019] [Accepted: 03/10/2019] [Indexed: 12/13/2022]
Abstract
Innate immune system quickly responds to invasion of microbes and foreign substances through the extracellular and intracellular sensing receptors, which recognize distinctive molecular and structural patterns. The recognition of innate immune receptors leads to the induction of inflammatory and adaptive immune responses by activating downstream signaling pathways. Allergy is an immune-related disease and results from a hypersensitive immune response to harmless substances in the environment. However, less is known about the activation of innate immunity during exposure to allergens. New insights into the innate immune system by sensors and their signaling cascades provide us with more important clues and a framework for understanding allergy disorders. In this review, we will focus on recent advances in the innate immune sensing system.
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Affiliation(s)
- Kazuhiko Maeda
- Laboratory of Host Defense, The World Premier International Research Center Initiative (WPI) Immunology Frontier Research Center (IFReC)Osaka UniversityOsakaJapan
| | - Matias J. Caldez
- Laboratory of Host Defense, The World Premier International Research Center Initiative (WPI) Immunology Frontier Research Center (IFReC)Osaka UniversityOsakaJapan
| | - Shizuo Akira
- Laboratory of Host Defense, The World Premier International Research Center Initiative (WPI) Immunology Frontier Research Center (IFReC)Osaka UniversityOsakaJapan
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30
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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] [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.
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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
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31
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Pfalzgraff A, Weindl G. Intracellular Lipopolysaccharide Sensing as a Potential Therapeutic Target for Sepsis. Trends Pharmacol Sci 2019; 40:187-197. [DOI: 10.1016/j.tips.2019.01.001] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 12/20/2018] [Accepted: 01/07/2019] [Indexed: 12/22/2022]
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