1
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Tran LS, Ying L, D'Costa K, Wray-McCann G, Kerr G, Le L, Allison CC, Ferrand J, Chaudhry H, Emery J, De Paoli A, Colon N, Creed S, Kaparakis-Liaskos M, Como J, Dowling JK, Johanesen PA, Kufer TA, Pedersen JS, Mansell A, Philpott DJ, Elgass KD, Abud HE, Nachbur U, Croker BA, Masters SL, Ferrero RL. NOD1 mediates interleukin-18 processing in epithelial cells responding to Helicobacter pylori infection in mice. Nat Commun 2023; 14:3804. [PMID: 37365163 DOI: 10.1038/s41467-023-39487-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 06/15/2023] [Indexed: 06/28/2023] Open
Abstract
The interleukin-1 family members, IL-1β and IL-18, are processed into their biologically active forms by multi-protein complexes, known as inflammasomes. Although the inflammasome pathways that mediate IL-1β processing in myeloid cells have been defined, those involved in IL-18 processing, particularly in non-myeloid cells, are still not well understood. Here we report that the host defence molecule NOD1 regulates IL-18 processing in mouse epithelial cells in response to the mucosal pathogen, Helicobacter pylori. Specifically, NOD1 in epithelial cells mediates IL-18 processing and maturation via interactions with caspase-1, instead of the canonical inflammasome pathway involving RIPK2, NF-κB, NLRP3 and ASC. NOD1 activation and IL-18 then help maintain epithelial homoeostasis to mediate protection against pre-neoplastic changes induced by gastric H. pylori infection in vivo. Our findings thus demonstrate a function for NOD1 in epithelial cell production of bioactive IL-18 and protection against H. pylori-induced pathology.
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Affiliation(s)
- L S Tran
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Molecular and Translational Science, Monash University, Melbourne, VIC, Australia
| | - L Ying
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Molecular and Translational Science, Monash University, Melbourne, VIC, Australia
| | - K D'Costa
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - G Wray-McCann
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - G Kerr
- Department of Anatomy and Developmental Biology, Development and Stem Cells Program, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - L Le
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - C C Allison
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - J Ferrand
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - H Chaudhry
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - J Emery
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Molecular and Translational Science, Monash University, Melbourne, VIC, Australia
| | - A De Paoli
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - N Colon
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - S Creed
- Monash Micro Imaging, Monash University, Melbourne, VIC, Australia
| | - M Kaparakis-Liaskos
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - J Como
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - J K Dowling
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
| | - P A Johanesen
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - T A Kufer
- Department of Immunology, University of Hohenheim, Institute of Nutritional Medicine, Stuttgart, Germany
| | | | - A Mansell
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Molecular and Translational Science, Monash University, Melbourne, VIC, Australia
| | - D J Philpott
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - K D Elgass
- Monash Micro Imaging, Monash University, Melbourne, VIC, Australia
| | - H E Abud
- Department of Anatomy and Developmental Biology, Development and Stem Cells Program, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - U Nachbur
- Cell Signalling and Cell Death Division, WEHI, Melbourne, VIC, Australia
| | - B A Croker
- Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
- Inflammation Division, WEHI, Melbourne, VIC, Australia
| | - S L Masters
- Inflammation Division, WEHI, Melbourne, VIC, Australia
| | - R L Ferrero
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, VIC, Australia.
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Melbourne, VIC, Australia.
- Inflammation Division, WEHI, Melbourne, VIC, Australia.
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2
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Yeung L, Anderson JML, Wee JL, Demaria MC, Finsterbusch M, Liu YS, Hall P, Smith BC, Dankers W, Elgass KD, Wicks IP, Kwok HF, Wright MD, Hickey MJ. Leukocyte Tetraspanin CD53 Restrains α 3 Integrin Mobilization and Facilitates Cytoskeletal Remodeling and Transmigration in Mice. J Immunol 2020; 205:521-532. [PMID: 32532837 DOI: 10.4049/jimmunol.1901054] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 05/15/2020] [Indexed: 01/13/2023]
Abstract
The importance of tetraspanin proteins in regulating migration has been demonstrated in many diverse cellular systems. However, the function of the leukocyte-restricted tetraspanin CD53 remains obscure. We therefore hypothesized that CD53 plays a role in regulating leukocyte recruitment and tested this hypothesis by examining responses of CD53-deficient mice to a range of inflammatory stimuli. Deletion of CD53 significantly reduced neutrophil recruitment to the acutely inflamed peritoneal cavity. Intravital microscopy revealed that in response to several inflammatory and chemotactic stimuli, absence of CD53 had only minor effects on leukocyte rolling and adhesion in postcapillary venules. In contrast, Cd53-/- mice showed a defect in leukocyte transmigration induced by TNF, CXCL1 and CCL2, and a reduced capacity for leukocyte retention on the endothelial surface under shear flow. Comparison of adhesion molecule expression in wild-type and Cd53-/- neutrophils revealed no alteration in expression of β2 integrins, whereas L-selectin was almost completely absent from Cd53-/- neutrophils. In addition, Cd53-/- neutrophils showed defects in activation-induced cytoskeletal remodeling and translocation to the cell periphery, responses necessary for efficient transendothelial migration, as well as increased α3 integrin expression. These alterations were associated with effects on inflammation, so that in Cd53-/- mice, the onset of neutrophil-dependent serum-induced arthritis was delayed. Together, these findings demonstrate a role for tetraspanin CD53 in promotion of neutrophil transendothelial migration and inflammation, associated with CD53-mediated regulation of L-selectin expression, attachment to the endothelial surface, integrin expression and trafficking, and cytoskeletal function.
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Affiliation(s)
- Louisa Yeung
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia.,Department of Immunology, Monash University, Alfred Research Alliance, Melbourne, Victoria 3004, Australia
| | - Jeremy M L Anderson
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia
| | - Janet L Wee
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia.,Department of Immunology, Monash University, Alfred Research Alliance, Melbourne, Victoria 3004, Australia
| | - Maria C Demaria
- Department of Immunology, Monash University, Alfred Research Alliance, Melbourne, Victoria 3004, Australia
| | - Michaela Finsterbusch
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia
| | - Yuxin S Liu
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia
| | - Pam Hall
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia
| | - Brodie C Smith
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia
| | - Wendy Dankers
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia
| | - Kirstin D Elgass
- Monash Micro Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - Ian P Wicks
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, Victoria 3050, Australia.,Department of Rheumatology, The Royal Melbourne Hospital, Parkville, Victoria 3050, Australia; and
| | - Hang Fai Kwok
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Taipa, Macau Special Administrative Region, China
| | - Mark D Wright
- Department of Immunology, Monash University, Alfred Research Alliance, Melbourne, Victoria 3004, Australia
| | - Michael J Hickey
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia;
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3
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Rudloff I, Jardé T, Bachmann M, Elgass KD, Kerr G, Engel R, Richards E, Oliva K, Wilkins S, McMurrick PJ, Abud HE, Mühl H, Nold MF. Molecular signature of interleukin-22 in colon carcinoma cells and organoid models. Transl Res 2020; 216:1-22. [PMID: 31734267 DOI: 10.1016/j.trsl.2019.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 10/18/2019] [Accepted: 10/22/2019] [Indexed: 12/18/2022]
Abstract
Interleukin (IL)-22 activates STAT (signal transducer and activator of transcription) 3 and antiapoptotic and proproliferative pathways; but beyond this, the molecular mechanisms by which IL-22 promotes carcinogenesis are poorly understood. Characterizing the molecular signature of IL-22 in human DLD-1 colon carcinoma cells, we observed increased expression of 26 genes, including NNMT (nicotinamide N-methyltransferase, ≤10-fold) and CEA (carcinoembryonic antigen, ≤7-fold), both known to promote intestinal carcinogenesis. ERP27 (endoplasmic reticulum protein-27, function unknown, ≤5-fold) and the proinflammatory ICAM1 (intercellular adhesion molecule-1, ≤4-fold) were also increased. The effect on CEA was partly STAT3-mediated, as STAT3-silencing reduced IL-22-induced CEA by ≤56%. Silencing of CEA or NNMT inhibited IL-22-induced proliferation/migration of DLD-1, Caco-2, and SW480 colon carcinoma cells. To validate these results in primary tissues, we assessed IL-22-induced gene expression in organoids from human healthy colon and colon cancer patients, and from normal mouse small intestine and colon. Gene regulation by IL-22 was similar in DLD-1 cells and human and mouse healthy organoids. CEA was an exception with no induction by IL-22 in organoids, indicating the 3-dimensional organization of the tissue may produce signals absent in 2D cell culture. Importantly, augmentation of NNMT was 5-14-fold greater in human cancerous compared to normal organoids, supporting a role for NNMT in IL-22-mediated colon carcinogenesis. Thus, NNMT and CEA emerge as mediators of the tumor-promoting effects of IL-22 in the intestine. These data advance our understanding of the multifaceted role of IL-22 in the gut and suggest the IL-22 pathway may represent a therapeutic target in colon cancer.
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Affiliation(s)
- Ina Rudloff
- Department of Paediatrics, Monash University, Clayton, Melbourne, Australia; Ritchie Centre, Hudson Institute of Medical Research, Clayton, Melbourne, Australia; Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe University Frankfurt am Main, Frankfurt am Main, Germany.
| | - Thierry Jardé
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Melbourne, Australia; Stem Cells and Development Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, Melbourne, Australia; Centre for Cancer Research, Hudson Institute of Medical Research, Clayton, Melbourne, Australia
| | - Malte Bachmann
- Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe University Frankfurt am Main, Frankfurt am Main, Germany
| | - Kirstin D Elgass
- Monash Micro Imaging, Hudson Institute of Medical Research, Clayton, Melbourne, Australia
| | - Genevieve Kerr
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Melbourne, Australia; Stem Cells and Development Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, Melbourne, Australia
| | - Rebekah Engel
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Melbourne, Australia; Stem Cells and Development Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, Melbourne, Australia; Cabrini Monash University Department of Surgery, Cabrini Hospital, Malvern, Melbourne, Australia
| | - Elizabeth Richards
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Melbourne, Australia; Stem Cells and Development Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, Melbourne, Australia
| | - Karen Oliva
- Cabrini Monash University Department of Surgery, Cabrini Hospital, Malvern, Melbourne, Australia
| | - Simon Wilkins
- Cabrini Monash University Department of Surgery, Cabrini Hospital, Malvern, Melbourne, Australia; Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Paul J McMurrick
- Cabrini Monash University Department of Surgery, Cabrini Hospital, Malvern, Melbourne, Australia
| | - Helen E Abud
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Melbourne, Australia; Stem Cells and Development Program, Monash Biomedicine Discovery Institute, Monash University, Clayton, Melbourne, Australia
| | - Heiko Mühl
- Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe University Frankfurt am Main, Frankfurt am Main, Germany
| | - Marcel F Nold
- Department of Paediatrics, Monash University, Clayton, Melbourne, Australia; Ritchie Centre, Hudson Institute of Medical Research, Clayton, Melbourne, Australia.
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4
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Gunasinghe SD, Shiota T, Stubenrauch CJ, Schulze KE, Webb CT, Fulcher AJ, Dunstan RA, Hay ID, Naderer T, Whelan DR, Bell TDM, Elgass KD, Strugnell RA, Lithgow T. The WD40 Protein BamB Mediates Coupling of BAM Complexes into Assembly Precincts in the Bacterial Outer Membrane. Cell Rep 2019; 23:2782-2794. [PMID: 29847806 DOI: 10.1016/j.celrep.2018.04.093] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 03/05/2018] [Accepted: 04/23/2018] [Indexed: 01/28/2023] Open
Abstract
The β-barrel assembly machinery (BAM) complex is essential for localization of surface proteins on bacterial cells, but the mechanism by which it functions is unclear. We developed a direct stochastic optical reconstruction microscopy (dSTORM) methodology to view the BAM complex in situ. Single-cell analysis showed that discrete membrane precincts housing several BAM complexes are distributed across the E. coli surface, with a nearest neighbor distance of ∼200 nm. The auxiliary lipoprotein subunit BamB was crucial for this spatial distribution, and in situ crosslinking shows that BamB makes intimate contacts with BamA and BamB in neighboring BAM complexes within the precinct. The BAM complex precincts swell when outer membrane protein synthesis is maximal, visual proof that the precincts are active in protein assembly. This nanoscale interrogation of the BAM complex in situ suggests a model whereby bacterial outer membranes contain highly organized assembly precincts to drive integral protein assembly.
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Affiliation(s)
- Sachith D Gunasinghe
- Infection & Immunity Program, Biomedicine Discovery Institute, and Department of Microbiology, Monash University, Clayton, VIC 3800, Australia
| | - Takuya Shiota
- Infection & Immunity Program, Biomedicine Discovery Institute, and Department of Microbiology, Monash University, Clayton, VIC 3800, Australia; Organization for Promotion of Tenure Track, University of Miyazaki, Miyazaki 889-1692, Japan
| | - Christopher J Stubenrauch
- Infection & Immunity Program, Biomedicine Discovery Institute, and Department of Microbiology, Monash University, Clayton, VIC 3800, Australia
| | - Keith E Schulze
- Monash Micro Imaging, Monash University, Clayton, VIC 3800, Australia
| | - Chaille T Webb
- Infection & Immunity Program, Biomedicine Discovery Institute, and Department of Microbiology, Monash University, Clayton, VIC 3800, Australia
| | - Alex J Fulcher
- Infection & Immunity Program, Biomedicine Discovery Institute, and Department of Microbiology, Monash University, Clayton, VIC 3800, Australia; Monash Micro Imaging, Monash University, Clayton, VIC 3800, Australia; Infection & Immunity Program, Biomedicine Discovery Institute, and Department of Biochemistry & Molecular Biology, Monash University, Clayton, VIC 3800, Australia
| | - Rhys A Dunstan
- Infection & Immunity Program, Biomedicine Discovery Institute, and Department of Microbiology, Monash University, Clayton, VIC 3800, Australia
| | - Iain D Hay
- Infection & Immunity Program, Biomedicine Discovery Institute, and Department of Microbiology, Monash University, Clayton, VIC 3800, Australia
| | - Thomas Naderer
- Infection & Immunity Program, Biomedicine Discovery Institute, and Department of Biochemistry & Molecular Biology, Monash University, Clayton, VIC 3800, Australia
| | - Donna R Whelan
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia; Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY, USA
| | - Toby D M Bell
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Kirstin D Elgass
- Monash Micro Imaging, Monash University, Clayton, VIC 3800, Australia; Hudson Institute of Medical Research, Clayton, VIC 3800, Australia
| | - Richard A Strugnell
- Department of Microbiology & Immunology, University of Melbourne, Parkville, VIC 3052, Australia
| | - Trevor Lithgow
- Infection & Immunity Program, Biomedicine Discovery Institute, and Department of Microbiology, Monash University, Clayton, VIC 3800, Australia.
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5
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Nguyen TA, Smith BRC, Elgass KD, Creed SJ, Cheung S, Tate MD, Belz GT, Wicks IP, Masters SL, Pang KC. SIDT1 Localizes to Endolysosomes and Mediates Double-Stranded RNA Transport into the Cytoplasm. J Immunol 2019; 202:3483-3492. [PMID: 31061008 DOI: 10.4049/jimmunol.1801369] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 04/14/2019] [Indexed: 12/15/2022]
Abstract
dsRNA is a common by-product of viral replication and acts as a potent trigger of antiviral immunity. SIDT1 and SIDT2 are closely related members of the SID-1 transmembrane family. SIDT2 functions as a dsRNA transporter and is required to traffic internalized dsRNA from endocytic compartments into the cytosol for innate immune activation, but the role of SIDT1 in dsRNA transport and in the innate immune response to viral infection is unclear. In this study, we show that Sidt1 expression is upregulated in response to dsRNA and type I IFN exposure and that SIDT1 interacts with SIDT2. Moreover, similar to SIDT2, SIDT1 localizes to the endolysosomal compartment, interacts with the long dsRNA analog poly(I:C), and, when overexpressed, enhances endosomal escape of poly(I:C) in vitro. To elucidate the role of SIDT1 in vivo, we generated SIDT1-deficient mice. Similar to Sidt2-/- mice, SIDT1-deficient mice produced significantly less type I IFN following infection with HSV type 1. In contrast to Sidt2-/- mice, however, SIDT1-deficient animals showed no impairment in survival postinfection with either HSV type 1 or encephalomyocarditis virus. Consistent with this, we observed that, unlike SIDT2, tissue expression of SIDT1 was relatively restricted, suggesting that, whereas SIDT1 can transport extracellular dsRNA into the cytoplasm following endocytosis in vitro, the transport activity of SIDT2 is likely to be functionally dominant in vivo.
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Affiliation(s)
- Tan A Nguyen
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria 3052, Australia
| | - Blake R C Smith
- Murdoch Children's Research Institute, Parkville, Victoria 3052, Australia
| | - Kirstin D Elgass
- Monash Micro Imaging, Hudson Institute of Medical Research, Clayton, Victoria 3168, Australia
| | - Sarah J Creed
- Monash Micro Imaging, Hudson Institute of Medical Research, Clayton, Victoria 3168, Australia
| | - Shane Cheung
- Monash Micro Imaging, Hudson Institute of Medical Research, Clayton, Victoria 3168, Australia
| | - Michelle D Tate
- Hudson Institute of Medical Research, Clayton, Victoria 3168, Australia.,Department of Molecular and Translational Sciences, Monash University, Clayton, Victoria 3168, Australia; and
| | - Gabrielle T Belz
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria 3052, Australia
| | - Ian P Wicks
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria 3052, Australia
| | - Seth L Masters
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria 3052, Australia
| | - Ken C Pang
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia; .,Department of Medical Biology, University of Melbourne, Parkville, Victoria 3052, Australia.,Murdoch Children's Research Institute, Parkville, Victoria 3052, Australia.,Department of Paediatrics, University of Melbourne, Parkville, Victoria 3052, Australia
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6
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Deo P, Chow SH, Hay ID, Kleifeld O, Costin A, Elgass KD, Jiang JH, Ramm G, Gabriel K, Dougan G, Lithgow T, Heinz E, Naderer T. Outer membrane vesicles from Neisseria gonorrhoeae target PorB to mitochondria and induce apoptosis. PLoS Pathog 2018; 14:e1006945. [PMID: 29601598 PMCID: PMC5877877 DOI: 10.1371/journal.ppat.1006945] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 02/21/2018] [Indexed: 01/31/2023] Open
Abstract
Neisseria gonorrhoeae causes the sexually transmitted disease gonorrhoea by evading innate immunity. Colonizing the mucosa of the reproductive tract depends on the bacterial outer membrane porin, PorB, which is essential for ion and nutrient uptake. PorB is also targeted to host mitochondria and regulates apoptosis pathways to promote infections. How PorB traffics from the outer membrane of N. gonorrhoeae to mitochondria and whether it modulates innate immune cells, such as macrophages, remains unclear. Here, we show that N. gonorrhoeae secretes PorB via outer membrane vesicles (OMVs). Purified OMVs contained primarily outer membrane proteins including oligomeric PorB. The porin was targeted to mitochondria of macrophages after exposure to purified OMVs and wild type N. gonorrhoeae. This was associated with loss of mitochondrial membrane potential, release of cytochrome c, activation of apoptotic caspases and cell death in a time-dependent manner. Consistent with this, OMV-induced macrophage death was prevented with the pan-caspase inhibitor, Q-VD-PH. This shows that N. gonorrhoeae utilizes OMVs to target PorB to mitochondria and to induce apoptosis in macrophages, thus affecting innate immunity. Neisseria gonorrhoeae causes the sexually transmitted disease gonorrhoea in more than 100 million people worldwide every year. The bacteria replicate in the reproductive tract by evading innate and adaptive immunity. In the absence of effective vaccines and the rise of antibiotic resistance, understanding the molecular interactions between innate immune cells and N. gonorrhoeae may lead to new strategies to combat bacterial growth and the symptoms of gonorrhoea. It has long been known that the N. gonorrhoeae porin, PorB, promotes bacterial survival but also targets host mitochondria in infections. The mechanism by which PorB traffics form the bacterial outer membrane to host mitochondria remains unclear. Here, we utilized proteomics and super-resolution microscopy to show that N. gonorrhoeae secretes PorB via outer membrane vesicles. These vesicles are taken up by macrophages and deliver PorB to mitochondria. Macrophages treated with N. gonorrhoeae vesicles contained damaged mitochondria and active caspase-3. A caspase inhibitor prevented apoptosis of macrophages treated with N. gonorrhoeae vesicles. This suggests that N. gonorrhoeae secretes membrane vesicles, which are readily detectable in gonorrhoea patients, to target macrophages and to promote infections.
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Affiliation(s)
- Pankaj Deo
- Biomedicine Discovery Institute and Department of Biochemistry & Molecular Biology, Monash University, Clayton, Victoria, Australia
| | - Seong H Chow
- Biomedicine Discovery Institute and Department of Biochemistry & Molecular Biology, Monash University, Clayton, Victoria, Australia
| | - Iain D Hay
- Biomedicine Discovery Institute and Department of Microbiology, Monash University, Clayton, Victoria, Australia
| | - Oded Kleifeld
- Biomedicine Discovery Institute and Department of Biochemistry & Molecular Biology, Monash University, Clayton, Victoria, Australia
| | - Adam Costin
- Monash Ramaciotti Centre for Cryo Electron Microscopy, Monash University, Clayton, Victoria, Australia
| | - Kirstin D Elgass
- Monash Micro Imaging, Monash University, Clayton, Victoria, Australia
| | - Jhih-Hang Jiang
- Biomedicine Discovery Institute and Department of Microbiology, Monash University, Clayton, Victoria, Australia
| | - Georg Ramm
- Biomedicine Discovery Institute and Department of Biochemistry & Molecular Biology, Monash University, Clayton, Victoria, Australia.,Monash Ramaciotti Centre for Cryo Electron Microscopy, Monash University, Clayton, Victoria, Australia
| | - Kipros Gabriel
- Biomedicine Discovery Institute and Department of Biochemistry & Molecular Biology, Monash University, Clayton, Victoria, Australia
| | - Gordon Dougan
- Infection Genomics Program, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Trevor Lithgow
- Biomedicine Discovery Institute and Department of Microbiology, Monash University, Clayton, Victoria, Australia
| | - Eva Heinz
- Biomedicine Discovery Institute and Department of Microbiology, Monash University, Clayton, Victoria, Australia.,Infection Genomics Program, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Thomas Naderer
- Biomedicine Discovery Institute and Department of Biochemistry & Molecular Biology, Monash University, Clayton, Victoria, Australia
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7
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Nguyen TA, Smith BRC, Tate MD, Belz GT, Barrios MH, Elgass KD, Weisman AS, Baker PJ, Preston SP, Whitehead L, Garnham A, Lundie RJ, Smyth GK, Pellegrini M, O'Keeffe M, Wicks IP, Masters SL, Hunter CP, Pang KC. SIDT2 Transports Extracellular dsRNA into the Cytoplasm for Innate Immune Recognition. Immunity 2017; 47:498-509.e6. [PMID: 28916264 DOI: 10.1016/j.immuni.2017.08.007] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 06/26/2017] [Accepted: 08/17/2017] [Indexed: 12/20/2022]
Abstract
Double-stranded RNA (dsRNA) is a common by-product of viral infections and acts as a potent trigger of antiviral immunity. In the nematode C. elegans, sid-1 encodes a dsRNA transporter that is highly conserved throughout animal evolution, but the physiological role of SID-1 and its orthologs remains unclear. Here, we show that the mammalian SID-1 ortholog, SIDT2, is required to transport internalized extracellular dsRNA from endocytic compartments into the cytoplasm for immune activation. Sidt2-deficient mice exposed to extracellular dsRNA, encephalomyocarditis virus (EMCV), and herpes simplex virus 1 (HSV-1) show impaired production of antiviral cytokines and-in the case of EMCV and HSV-1-reduced survival. Thus, SIDT2 has retained the dsRNA transport activity of its C. elegans ortholog, and this transport is important for antiviral immunity.
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Affiliation(s)
- Tan A Nguyen
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Blake R C Smith
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia
| | - Michelle D Tate
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, VIC, Australia; Department of Molecular and Translational Sciences, Monash University, Clayton, VIC, Australia
| | - Gabrielle T Belz
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Marilou H Barrios
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Kirstin D Elgass
- Monash Micro Imaging, Monash University, Clayton, VIC, Australia
| | - Alexandra S Weisman
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA, USA
| | - Paul J Baker
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Simon P Preston
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Lachlan Whitehead
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Alexandra Garnham
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Rachel J Lundie
- Burnet Institute, Melbourne, VIC, Australia; Biomedicine Discovery Institute, Department Biochemistry & Molecular Biology, Monash University, Clayton, VIC, Australia
| | - Gordon K Smyth
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; School of Mathematics & Statistics, University of Melbourne, Parkville, VIC, Australia
| | - Marc Pellegrini
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Meredith O'Keeffe
- Burnet Institute, Melbourne, VIC, Australia; Biomedicine Discovery Institute, Department Biochemistry & Molecular Biology, Monash University, Clayton, VIC, Australia
| | - Ian P Wicks
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Seth L Masters
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Craig P Hunter
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA, USA
| | - Ken C Pang
- The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Murdoch Childrens Research Institute, Parkville, VIC, Australia; Department of Paediatrics, University of Melbourne, Parkville, VIC, Australia; Department of Psychiatry, University of Melbourne, Parkville, VIC, Australia.
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8
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Gunasinghe SD, Webb CT, Elgass KD, Hay ID, Lithgow T. Super-Resolution Imaging of Protein Secretion Systems and the Cell Surface of Gram-Negative Bacteria. Front Cell Infect Microbiol 2017; 7:220. [PMID: 28611954 PMCID: PMC5447050 DOI: 10.3389/fcimb.2017.00220] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 05/12/2017] [Indexed: 12/28/2022] Open
Abstract
Gram-negative bacteria have a highly evolved cell wall with two membranes composed of complex arrays of integral and peripheral proteins, as well as phospholipids and glycolipids. In order to sense changes in, respond to, and exploit their environmental niches, bacteria rely on structures assembled into or onto the outer membrane. Protein secretion across the cell wall is a key process in virulence and other fundamental aspects of bacterial cell biology. The final stage of protein secretion in Gram-negative bacteria, translocation across the outer membrane, is energetically challenging so sophisticated nanomachines have evolved to meet this challenge. Advances in fluorescence microscopy now allow for the direct visualization of the protein secretion process, detailing the dynamics of (i) outer membrane biogenesis and the assembly of protein secretion systems into the outer membrane, (ii) the spatial distribution of these and other membrane proteins on the bacterial cell surface, and (iii) translocation of effector proteins, toxins and enzymes by these protein secretion systems. Here we review the frontier research imaging the process of secretion, particularly new studies that are applying various modes of super-resolution microscopy.
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Affiliation(s)
- Sachith D Gunasinghe
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash UniversityClayton, VIC, Australia
| | - Chaille T Webb
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash UniversityClayton, VIC, Australia
| | | | - Iain D Hay
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash UniversityClayton, VIC, Australia
| | - Trevor Lithgow
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash UniversityClayton, VIC, Australia
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9
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Prokopuk L, Stringer JM, Hogg K, Elgass KD, Western PS. PRC2 is required for extensive reorganization of H3K27me3 during epigenetic reprogramming in mouse fetal germ cells. Epigenetics Chromatin 2017; 10:7. [PMID: 28239420 PMCID: PMC5319108 DOI: 10.1186/s13072-017-0113-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 02/01/2017] [Indexed: 11/18/2022] Open
Abstract
Background Defining how epigenetic information is established in the germline during fetal development is key to understanding how epigenetic information is inherited and impacts on evolution and human health and disease. Results Here, we show that Polycomb Repressive Complex 2 is transiently localized in the nucleus of mouse fetal germ cells, while DNA methylation is removed from the germline. This coincides with significant enrichment of trimethylated lysine 27 on histone 3 near the nuclear lamina that is dependent on activity of the essential PRC2 catalytic proteins, Enhancer of Zeste 1 and/or 2. Conclusions Combined, these data reveal a role for Polycomb Repressive Complex 2 and trimethylated lysine 27 on histone 3 during germline epigenetic programming that we speculate is required to repress target sequences while DNA methylation is removed. Electronic supplementary material The online version of this article (doi:10.1186/s13072-017-0113-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lexie Prokopuk
- Department of Molecular and Translational Science, Centre for Genetic Diseases, Hudson Institute of Medical Research, Monash University, Clayton, VIC 3168 Australia
| | - Jessica M Stringer
- Department of Molecular and Translational Science, Centre for Genetic Diseases, Hudson Institute of Medical Research, Monash University, Clayton, VIC 3168 Australia
| | - Kirsten Hogg
- Department of Molecular and Translational Science, Centre for Genetic Diseases, Hudson Institute of Medical Research, Monash University, Clayton, VIC 3168 Australia
| | - Kirstin D Elgass
- Monash Micro Imaging, Monash University, Clayton, VIC 3800 Australia
| | - Patrick S Western
- Department of Molecular and Translational Science, Centre for Genetic Diseases, Hudson Institute of Medical Research, Monash University, Clayton, VIC 3168 Australia
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10
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Jones MWM, Elgass KD, Junker MD, de Jonge MD, van Riessen GA. Molar concentration from sequential 2-D water-window X-ray ptychography and X-ray fluorescence in hydrated cells. Sci Rep 2016; 6:24280. [PMID: 27067957 PMCID: PMC4828672 DOI: 10.1038/srep24280] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 03/22/2016] [Indexed: 01/25/2023] Open
Abstract
Recent developments in biological X-ray microscopy have allowed structural information and elemental distribution to be simultaneously obtained by combining X-ray ptychography and X-ray fluorescence microscopy. Experimentally, these methods can be performed simultaneously; however, the optimal conditions for each measurement may not be compatible. Here, we combine two distinct measurements of ultrastructure and elemental distribution, with each measurement performed under optimised conditions. By combining optimised ptychography and fluorescence information we are able to determine molar concentrations from two-dimensional images, allowing an investigation into the interactions between the environment sensing filopodia in fibroblasts and extracellular calcium. Furthermore, the biological ptychography results we present illustrate a point of maturity where the technique can be applied to solve significant problems in structural biology.
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Affiliation(s)
- M W M Jones
- Australian Synchrotron, 800 Blackburn Rd, Clayton, 3168, Australia.,ARC Centre of Excellence for Advanced Molecular Imaging, La Trobe Institute for Molecular Sciences, La Trobe University, Bundoora, 3086, Australia
| | - K D Elgass
- Monash Micro Imaging, Hudson Institute of Medical Research, 27-31 Wright Street, Clayton, 3168, Australia
| | - M D Junker
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Victoria 3086, Australia
| | - M D de Jonge
- Australian Synchrotron, 800 Blackburn Rd, Clayton, 3168, Australia
| | - G A van Riessen
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Victoria 3086, Australia
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11
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Elgass KD, Smith EA, LeGros MA, Larabell CA, Ryan MT. Analysis of ER-mitochondria contacts using correlative fluorescence microscopy and soft X-ray tomography of mammalian cells. J Cell Sci 2015; 128:2795-804. [PMID: 26101352 DOI: 10.1242/jcs.169136] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Accepted: 06/17/2015] [Indexed: 01/04/2023] Open
Abstract
Mitochondrial fission is important for organelle transport, quality control and apoptosis. Changes to the fission process can result in a wide variety of neurological diseases. In mammals, mitochondrial fission is executed by the GTPase dynamin-related protein 1 (Drp1; encoded by DNM1L), which oligomerizes around mitochondria and constricts the organelle. The mitochondrial outer membrane proteins Mff, MiD49 (encoded by MIEF2) and MiD51 (encoded by MIEF1) are involved in mitochondrial fission by recruiting Drp1 from the cytosol to the organelle surface. In addition, endoplasmic reticulum (ER) tubules have been shown to wrap around and constrict mitochondria before a fission event. Up to now, the presence of MiD49 and MiD51 at ER-mitochondrial division foci has not been established. Here, we combine confocal live-cell imaging with correlative cryogenic fluorescence microscopy and soft x-ray tomography to link MiD49 and MiD51 to the involvement of the ER in mitochondrial fission. We gain further insight into this complex process and characterize the 3D structure of ER-mitochondria contact sites.
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Affiliation(s)
- Kirstin D Elgass
- Hudson Institute for Medical Research, Monash Micro Imaging, Monash University, Melbourne 3168, Australia
| | - Elizabeth A Smith
- Department of Anatomy, School of Medicine, University of California San Francisco, San Francisco, CA 94158, USA National Centre for X-ray Tomography, Advanced Light Source, Berkeley, CA 94720, USA
| | - Mark A LeGros
- Department of Anatomy, School of Medicine, University of California San Francisco, San Francisco, CA 94158, USA National Centre for X-ray Tomography, Advanced Light Source, Berkeley, CA 94720, USA
| | - Carolyn A Larabell
- Department of Anatomy, School of Medicine, University of California San Francisco, San Francisco, CA 94158, USA National Centre for X-ray Tomography, Advanced Light Source, Berkeley, CA 94720, USA
| | - Michael T Ryan
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Melbourne 3800, Australia
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12
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Nold-Petry CA, Lo CY, Rudloff I, Elgass KD, Li S, Gantier MP, Lotz-Havla AS, Gersting SW, Cho SX, Lao JC, Ellisdon AM, Rotter B, Azam T, Mangan NE, Rossello FJ, Whisstock JC, Bufler P, Garlanda C, Mantovani A, Dinarello CA, Nold MF. IL-37 requires the receptors IL-18Rα and IL-1R8 (SIGIRR) to carry out its multifaceted anti-inflammatory program upon innate signal transduction. Nat Immunol 2015; 16:354-65. [PMID: 25729923 DOI: 10.1038/ni.3103] [Citation(s) in RCA: 310] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 01/12/2015] [Indexed: 12/12/2022]
Abstract
Interleukin 37 (IL-37) and IL-1R8 (SIGIRR or TIR8) are anti-inflammatory orphan members of the IL-1 ligand family and IL-1 receptor family, respectively. Here we demonstrate formation and function of the endogenous ligand-receptor complex IL-37-IL-1R8-IL-18Rα. The tripartite complex assembled rapidly on the surface of peripheral blood mononuclear cells upon stimulation with lipopolysaccharide. Silencing of IL-1R8 or IL-18Rα impaired the anti-inflammatory activity of IL-37. Whereas mice with transgenic expression of IL-37 (IL-37tg mice) with intact IL-1R8 were protected from endotoxemia, IL-1R8-deficient IL-37tg mice were not. Proteomic and transcriptomic investigations revealed that IL-37 used IL-1R8 to harness the anti-inflammatory properties of the signaling molecules Mer, PTEN, STAT3 and p62(dok) and to inhibit the kinases Fyn and TAK1 and the transcription factor NF-κB, as well as mitogen-activated protein kinases. Furthermore, IL-37-IL-1R8 exerted a pseudo-starvational effect on the metabolic checkpoint kinase mTOR. IL-37 thus bound to IL-18Rα and exploited IL-1R8 to activate a multifaceted intracellular anti-inflammatory program.
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Affiliation(s)
- Claudia A Nold-Petry
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Paediatrics, Monash University, Melbourne, Australia
| | - Camden Y Lo
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Monash Micro Imaging, Monash University, Melbourne, Australia
| | - Ina Rudloff
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Paediatrics, Monash University, Melbourne, Australia
| | | | - Suzhao Li
- Department of Medicine, University of Colorado Denver, Aurora, Colorado, USA
| | - Michael P Gantier
- 1] Centre for Cancer Research, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Molecular and Translational Science, Monash University, Melbourne, Australia
| | | | - Søren W Gersting
- Molecular Pediatrics, Ludwig-Maximilians University, Munich, Germany
| | - Steven X Cho
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Paediatrics, Monash University, Melbourne, Australia
| | - Jason C Lao
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Paediatrics, Monash University, Melbourne, Australia
| | - Andrew M Ellisdon
- 1] Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Australia. [2] Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Melbourne, Australia
| | | | - Tania Azam
- Department of Medicine, University of Colorado Denver, Aurora, Colorado, USA
| | - Niamh E Mangan
- 1] Department of Molecular and Translational Science, Monash University, Melbourne, Australia. [2] Centre for Innate Immunity and Infectious Diseases, MIMR-PHI Institute of Medical Research, Melbourne, Australia
| | - Fernando J Rossello
- Victorian Bioinformatics Consortium, Monash University, Melbourne, Australia
| | - James C Whisstock
- 1] Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Australia. [2] Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Melbourne, Australia
| | - Philip Bufler
- Department of Pediatrics, Dr. von Hauner Children's Hospital, Ludwig-Maximilians University, Munich, Germany
| | | | - Alberto Mantovani
- 1] Humanitas Clinical and Research Center, Rozzano, Italy. [2] Humanitas University, Rozzano, Italy
| | - Charles A Dinarello
- 1] Department of Medicine, University of Colorado Denver, Aurora, Colorado, USA. [2] Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Marcel F Nold
- 1] Ritchie Centre, MIMR-PHI Institute of Medical Research, Melbourne, Victoria, Australia. [2] Department of Paediatrics, Monash University, Melbourne, Australia. [3] Department of Medicine, University of Colorado Denver, Aurora, Colorado, USA
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13
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Palmer CS, Elgass KD, Parton RG, Osellame LD, Stojanovski D, Ryan MT. Adaptor proteins MiD49 and MiD51 can act independently of Mff and Fis1 in Drp1 recruitment and are specific for mitochondrial fission. J Biol Chem 2013; 288:27584-27593. [PMID: 23921378 DOI: 10.1074/jbc.m113.479873] [Citation(s) in RCA: 205] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Drp1 (dynamin-related protein 1) is recruited to both mitochondrial and peroxisomal membranes to execute fission. Fis1 and Mff are Drp1 receptor/effector proteins of mitochondria and peroxisomes. Recently, MiD49 and MiD51 were also shown to recruit Drp1 to the mitochondrial surface; however, different reports have ascribed opposing roles in fission and fusion. Here, we show that MiD49 or MiD51 overexpression blocked fission by acting in a dominant-negative manner by sequestering Drp1 specifically at mitochondria, causing unopposed fusion events at mitochondria along with elongation of peroxisomes. Mitochondrial elongation caused by MiD49/51 overexpression required the action of fusion mediators mitofusins 1 and 2. Furthermore, at low level overexpression when MiD49 and MiD51 form discrete foci at mitochondria, mitochondrial fission events still occurred. Unlike Fis1 and Mff, MiD49 and MiD51 were not targeted to the peroxisomal surface, suggesting that they specifically act to facilitate Drp1-directed fission at mitochondria. Moreover, when MiD49 or MiD51 was targeted to the surface of peroxisomes or lysosomes, Drp1 was specifically recruited to these organelles. Moreover, the Drp1 recruitment activity of MiD49/51 appeared stronger than that of Mff or Fis1. We conclude that MiD49 and MiD51 can act independently of Mff and Fis1 in Drp1 recruitment and suggest that they provide specificity to the division of mitochondria.
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Affiliation(s)
- Catherine S Palmer
- Department of Biochemistry, La Trobe Institute for Molecular Science; ARC Centre of Excellence for Coherent X-ray Science, La Trobe University, Melbourne, Victoria 3086
| | - Kirstin D Elgass
- Department of Biochemistry, La Trobe Institute for Molecular Science; ARC Centre of Excellence for Coherent X-ray Science, La Trobe University, Melbourne, Victoria 3086
| | - Robert G Parton
- Institute for Molecular Bioscience and Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Laura D Osellame
- Department of Biochemistry, La Trobe Institute for Molecular Science
| | - Diana Stojanovski
- Department of Biochemistry, La Trobe Institute for Molecular Science; ARC Centre of Excellence for Coherent X-ray Science, La Trobe University, Melbourne, Victoria 3086
| | - Michael T Ryan
- Department of Biochemistry, La Trobe Institute for Molecular Science; ARC Centre of Excellence for Coherent X-ray Science, La Trobe University, Melbourne, Victoria 3086.
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