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Zhao Z, Liu S, Wu C, Wang Q, Zhang Y, Wang B, Wang L, Sun R, Guo M, Ji W. Bioinformatics characteristics and expression analysis of TLR3 and its adaptor protein TRIF in Largemouth bass (Micropterus salmoides) upon Flavobacterium columnare infection. Gene 2023; 872:147450. [PMID: 37120121 DOI: 10.1016/j.gene.2023.147450] [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: 12/02/2022] [Revised: 03/19/2023] [Accepted: 04/24/2023] [Indexed: 05/01/2023]
Abstract
TLR3 and TRIF (adaptor protein for TLR3) are vital to the MyD88-independent pathway mediated by Toll-like receptors (TLRs). In order to identify the role of TLR3 and TRIF in Micropterus salmoides, the Ms_TLR3 and Ms_TRIF (Ms: abbreviation for M. salmoides) were cloned and characterized in this study. The open reading frames (ORFs) of Ms_TLR3 and Ms_TRIF genes were 2736 bp and 1791 bp in length, encoding 911 and 596 amino acids, respectively. The protein structure of Ms_TLR3 includes a signal peptide, 18 LRR-related domains, a low complexity region, a transmembrane region, and a TIR domain. However, only a TIR domain and a coiled coil domain were found in Ms_TRIF. Both Ms_TLR3 and Ms_TRIF showed the highest homology to that of M. dolomieu. Ms_TLR3 and Ms_TRIF showed similar expression patterns in various tissues, with the highest expression level in the head kidney. After stimulation of Flavobacterium columnare, the mRNA expressions of Ms_TLR3 and Ms_TRIF were significantly up-regulated at 1 dpi in the gill, spleen and head kidney, and at 6 hpi in the trunk kidney. Furthermore, morphological changes in the gills of largemouth bass challenged with F. columnare suggested that F. columnare infection can destroy the gill filament. Taken together, Ms_TLR3 and Ms_TRIF are indeed involved in F. columnare infection and the subsequent immune response in largemouth bass. Moreover, Ms_TLR3 and Ms_TRIF might respectively play their potential roles in mucosal (mainly in the gill) and systemic (mainly in the head kidney) immune response to bacterial infection.
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Affiliation(s)
- Zhangchun Zhao
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Sixue Liu
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Chen Wu
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Qin Wang
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Yaqian Zhang
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Bingchao Wang
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Long Wang
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China
| | - Ruhan Sun
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Mengge Guo
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Wei Ji
- Department of Aquatic Animal Medicines, College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affair/Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China.
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2
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Zhou J, Rasmussen NL, Olsvik HL, Akimov V, Hu Z, Evjen G, Kaeser-Pebernard S, Sankar DS, Roubaty C, Verlhac P, van de Beck N, Reggiori F, Abudu YP, Blagoev B, Lamark T, Johansen T, Dengjel J. TBK1 phosphorylation activates LIR-dependent degradation of the inflammation repressor TNIP1. J Cell Biol 2022; 222:213785. [PMID: 36574265 PMCID: PMC9797988 DOI: 10.1083/jcb.202108144] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 06/24/2022] [Accepted: 08/17/2022] [Indexed: 12/28/2022] Open
Abstract
Limitation of excessive inflammation due to selective degradation of pro-inflammatory proteins is one of the cytoprotective functions attributed to autophagy. In the current study, we highlight that selective autophagy also plays a vital role in promoting the establishment of a robust inflammatory response. Under inflammatory conditions, here TLR3-activation by poly(I:C) treatment, the inflammation repressor TNIP1 (TNFAIP3 interacting protein 1) is phosphorylated by Tank-binding kinase 1 (TBK1) activating an LIR motif that leads to the selective autophagy-dependent degradation of TNIP1, supporting the expression of pro-inflammatory genes and proteins. This selective autophagy efficiently reduces TNIP1 protein levels early (0-4 h) upon poly(I:C) treatment to allow efficient initiation of the inflammatory response. At 6 h, TNIP1 levels are restored due to increased transcription avoiding sustained inflammation. Thus, similarly as in cancer, autophagy may play a dual role in controlling inflammation depending on the exact state and timing of the inflammatory response.
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Affiliation(s)
- Jianwen Zhou
- https://ror.org/022fs9h90Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Nikoline Lander Rasmussen
- Autophagy Research Group, Department of Medical Biology, University of Tromsø—The Arctic University of Norway, Tromsø, Norway
| | - Hallvard Lauritz Olsvik
- Autophagy Research Group, Department of Medical Biology, University of Tromsø—The Arctic University of Norway, Tromsø, Norway
| | - Vyacheslav Akimov
- https://ror.org/03yrrjy16Department of Biochemistry and Molecular Biology, Center for Experimental BioInformatics, University of Southern Denmark, Odense, Denmark
| | - Zehan Hu
- https://ror.org/022fs9h90Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Gry Evjen
- Autophagy Research Group, Department of Medical Biology, University of Tromsø—The Arctic University of Norway, Tromsø, Norway
| | | | | | - Carole Roubaty
- https://ror.org/022fs9h90Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Pauline Verlhac
- https://ror.org/03cv38k47Department of Biomedical Sciences of Cells and Systems, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Nicole van de Beck
- https://ror.org/03cv38k47Department of Biomedical Sciences of Cells and Systems, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Fulvio Reggiori
- https://ror.org/03cv38k47Department of Biomedical Sciences of Cells and Systems, University of Groningen, University Medical Center Groningen, Groningen, Netherlands,https://ror.org/01aj84f44Department of Biomedicine, Aarhus University, Aarhus, Denmark,https://ror.org/01aj84f44Aarhus Institute of Advanced Studies (AIAS), Aarhus University, Aarhus, Denmark
| | - Yakubu Princely Abudu
- Autophagy Research Group, Department of Medical Biology, University of Tromsø—The Arctic University of Norway, Tromsø, Norway
| | - Blagoy Blagoev
- https://ror.org/03yrrjy16Department of Biochemistry and Molecular Biology, Center for Experimental BioInformatics, University of Southern Denmark, Odense, Denmark
| | - Trond Lamark
- Autophagy Research Group, Department of Medical Biology, University of Tromsø—The Arctic University of Norway, Tromsø, Norway
| | - Terje Johansen
- Autophagy Research Group, Department of Medical Biology, University of Tromsø—The Arctic University of Norway, Tromsø, Norway,Terje Johansen:
| | - Jörn Dengjel
- https://ror.org/022fs9h90Department of Biology, University of Fribourg, Fribourg, Switzerland,Correspondence to Jörn Dengjel:
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3
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Lim CS, Jang YH, Lee GY, Han GM, Jeong HJ, Kim JW, Lee JO. TLR3 forms a highly organized cluster when bound to a poly(I:C) RNA ligand. Nat Commun 2022; 13:6876. [PMID: 36371424 PMCID: PMC9653405 DOI: 10.1038/s41467-022-34602-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 10/25/2022] [Indexed: 11/15/2022] Open
Abstract
Toll-like Receptor 3 (TLR3) initiates a potent anti-viral immune response by binding to double-stranded RNA ligands. Previous crystallographic studies showed that TLR3 forms a homodimer when bound to a 46-base pair RNA ligand. However, this short RNA fails to initiate a robust immune response. To obtain structural insights into the length dependency of TLR3 ligands, we determine the cryo-electron microscopy structure of full-length TLR3 in a complex with a synthetic RNA ligand with an average length of ~400 base pairs. In the structure, the dimeric TLR3 units are clustered along the double-stranded RNA helix in a highly organized and cooperative fashion with a uniform inter-dimer spacing of 103 angstroms. The intracellular and transmembrane domains are dispensable for the clustering because their deletion does not interfere with the cluster formation. Our structural observation suggests that ligand-induced clustering of TLR3 dimers triggers the ordered assembly of intracellular signaling adaptors and initiates a robust innate immune response.
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Affiliation(s)
- Chan Seok Lim
- Department of Life Sciences and POSTECH, Pohang, 37673 Korea
| | - Yoon Ha Jang
- Department of Life Sciences and POSTECH, Pohang, 37673 Korea
| | - Ga Young Lee
- Department of Life Sciences and POSTECH, Pohang, 37673 Korea
| | - Gu Min Han
- Department of Life Sciences and POSTECH, Pohang, 37673 Korea
| | - Hye Jin Jeong
- grid.49100.3c0000 0001 0742 4007Institute of Membrane Proteins, POSTECH, Pohang, 37673 Korea
| | - Ji Won Kim
- Department of Life Sciences and POSTECH, Pohang, 37673 Korea ,grid.49100.3c0000 0001 0742 4007Institute of Membrane Proteins, POSTECH, Pohang, 37673 Korea
| | - Jie-Oh Lee
- Department of Life Sciences and POSTECH, Pohang, 37673 Korea ,grid.49100.3c0000 0001 0742 4007Institute of Membrane Proteins, POSTECH, Pohang, 37673 Korea
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The RHIM of the Immune Adaptor Protein TRIF Forms Hybrid Amyloids with Other Necroptosis-Associated Proteins. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27113382. [PMID: 35684320 PMCID: PMC9182532 DOI: 10.3390/molecules27113382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/22/2022] [Accepted: 05/23/2022] [Indexed: 12/19/2022]
Abstract
TIR-domain-containing adapter-inducing interferon-β (TRIF) is an innate immune protein that serves as an adaptor for multiple cellular signalling outcomes in the context of infection. TRIF is activated via ligation of Toll-like receptors 3 and 4. One outcome of TRIF-directed signalling is the activation of the programmed cell death pathway necroptosis, which is governed by interactions between proteins that contain a RIP Homotypic Interaction Motif (RHIM). TRIF contains a RHIM sequence and can interact with receptor interacting protein kinases 1 (RIPK1) and 3 (RIPK3) to initiate necroptosis. Here, we demonstrate that the RHIM of TRIF is amyloidogenic and supports the formation of homomeric TRIF-containing fibrils. We show that the core tetrad sequence within the RHIM governs the supramolecular organisation of TRIF amyloid assemblies, although the stable amyloid core of TRIF amyloid fibrils comprises a much larger region than the conserved RHIM only. We provide evidence that RHIMs of TRIF, RIPK1 and RIPK3 interact directly to form heteromeric structures and that these TRIF-containing hetero-assemblies display altered and emergent properties that likely underlie necroptosis signalling in response to Toll-like receptor activation.
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Kaur G, Iyer LM, Burroughs AM, Aravind L. Bacterial death and TRADD-N domains help define novel apoptosis and immunity mechanisms shared by prokaryotes and metazoans. eLife 2021; 10:70394. [PMID: 34061031 PMCID: PMC8195603 DOI: 10.7554/elife.70394] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 05/23/2021] [Indexed: 12/12/2022] Open
Abstract
Several homologous domains are shared by eukaryotic immunity and programmed cell-death systems and poorly understood bacterial proteins. Recent studies show these to be components of a network of highly regulated systems connecting apoptotic processes to counter-invader immunity, in prokaryotes with a multicellular habit. However, the provenance of key adaptor domains, namely those of the Death-like and TRADD-N superfamilies, a quintessential feature of metazoan apoptotic systems, remained murky. Here, we use sensitive sequence analysis and comparative genomics methods to identify unambiguous bacterial homologs of the Death-like and TRADD-N superfamilies. We show the former to have arisen as part of a radiation of effector-associated α-helical adaptor domains that likely mediate homotypic interactions bringing together diverse effector and signaling domains in predicted bacterial apoptosis- and counter-invader systems. Similarly, we show that the TRADD-N domain defines a key, widespread signaling bridge that links effector deployment to invader-sensing in multicellular bacterial and metazoan counter-invader systems. TRADD-N domains are expanded in aggregating marine invertebrates and point to distinctive diversifying immune strategies probably directed both at RNA and retroviruses and cellular pathogens that might infect such communities. These TRADD-N and Death-like domains helped identify several new bacterial and metazoan counter-invader systems featuring underappreciated, common functional principles: the use of intracellular invader-sensing lectin-like (NPCBM and FGS), transcription elongation GreA/B-C, glycosyltransferase-4 family, inactive NTPase (serving as nucleic acid receptors), and invader-sensing GTPase switch domains. Finally, these findings point to the possibility of multicellular bacteria-stem metazoan symbiosis in the emergence of the immune/apoptotic systems of the latter.
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Affiliation(s)
- Gurmeet Kaur
- Computational Biology Branch, National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, United States
| | - Lakshminarayan M Iyer
- Computational Biology Branch, National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, United States
| | - A Maxwell Burroughs
- Computational Biology Branch, National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, United States
| | - L Aravind
- Computational Biology Branch, National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, United States
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6
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Dabouz R, Cheng CWH, Abram P, Omri S, Cagnone G, Sawmy KV, Joyal JS, Desjarlais M, Olson D, Weil AG, Lubell W, Rivera JC, Chemtob S. An allosteric interleukin-1 receptor modulator mitigates inflammation and photoreceptor toxicity in a model of retinal degeneration. J Neuroinflammation 2020; 17:359. [PMID: 33246504 PMCID: PMC7694438 DOI: 10.1186/s12974-020-02032-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 11/10/2020] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Inflammation and particularly interleukin-1β (IL-1β), a pro-inflammatory cytokine highly secreted by activated immune cells during early AMD pathological events, contribute significantly to retinal neurodegeneration. Here, we identify specific cell types that generate IL-1β and harbor the IL-1 receptor (IL-1R) and pharmacologically validate IL-1β's contribution to neuro-retinal degeneration using the IL-1R allosteric modulator composed of the amino acid sequence rytvela (as well as the orthosteric antagonist, Kineret) in a model of blue light-induced retinal degeneration. METHODS Mice were exposed to blue light for 6 h and sacrificed 3 days later. Mice were intraperitoneally injected with rytvela, Kineret, or vehicle twice daily for 3 days. The inflammatory markers F4/80, NLRP3, caspase-1, and IL-1β were assessed in the retinas. Single-cell RNA sequencing was used to determine the cell-specific expression patterns of retinal Il1b and Il1r1. Macrophage-induced photoreceptor death was assessed ex vivo using retinal explants co-cultured with LPS-activated bone marrow-derived macrophages. Photoreceptor cell death was evaluated by the TUNEL assay. Retinal function was assessed by flash electroretinography. RESULTS Blue light markedly increased the mononuclear phagocyte recruitment and levels of inflammatory markers associated with photoreceptor death. Co-localization of NLRP3, caspase-1, and IL-1β with F4/80+ mononuclear phagocytes was clearly detected in the subretinal space, suggesting that these inflammatory cells are the main source of IL-1β. Single-cell RNA sequencing confirmed the immune-specific expression of Il1b and notably perivascular macrophages in light-challenged mice, while Il1r1 expression was found primarily in astrocytes, bipolar, and vascular cells. Retinal explants co-cultured with LPS/ATP-activated bone marrow-derived macrophages displayed a high number of TUNEL-positive photoreceptors, which was abrogated by rytvela treatment. IL-1R antagonism significantly mitigated the inflammatory response triggered in vivo by blue light exposure, and rytvela was superior to Kineret in preserving photoreceptor density and retinal function. CONCLUSION These findings substantiate the importance of IL-1β in neuro-retinal degeneration and revealed specific sources of Il1b from perivascular MPs, with its receptor Ilr1 being separately expressed on surrounding neuro-vascular and astroglial cells. They also validate the efficacy of rytvela-induced IL-1R modulation in suppressing detrimental inflammatory responses and preserving photoreceptor density and function in these conditions, reinforcing the rationale for clinical translation.
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Affiliation(s)
- Rabah Dabouz
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada.,Departments of Pediatrics, Ophthalmology, and Pharmacology, Hôpital Maisonneuve-Rosemont Research Center, 5415 Boul L'Assomption, Montreal, QC, H1T 2 M4, Canada.,Hôpital Sainte Justine Research Centre, Montreal, QC, Canada
| | - Colin W H Cheng
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada.,Departments of Pediatrics, Ophthalmology, and Pharmacology, Hôpital Maisonneuve-Rosemont Research Center, 5415 Boul L'Assomption, Montreal, QC, H1T 2 M4, Canada.,Hôpital Sainte Justine Research Centre, Montreal, QC, Canada
| | - Pénélope Abram
- Departments of Pediatrics, Ophthalmology, and Pharmacology, Hôpital Maisonneuve-Rosemont Research Center, 5415 Boul L'Assomption, Montreal, QC, H1T 2 M4, Canada
| | - Samy Omri
- Departments of Pediatrics, Ophthalmology, and Pharmacology, Hôpital Maisonneuve-Rosemont Research Center, 5415 Boul L'Assomption, Montreal, QC, H1T 2 M4, Canada
| | - Gael Cagnone
- Hôpital Sainte Justine Research Centre, Montreal, QC, Canada
| | | | | | - Michel Desjarlais
- Departments of Pediatrics, Ophthalmology, and Pharmacology, Hôpital Maisonneuve-Rosemont Research Center, 5415 Boul L'Assomption, Montreal, QC, H1T 2 M4, Canada
| | - David Olson
- Department of Obstetrics & Gynecology, University of Alberta, Edmonton, AB, Canada
| | - Alexander G Weil
- Department of Neurosurgery, Hôpital Sainte Justine, Montreal, QC, Canada
| | - William Lubell
- Department of Chemistry, University of Montreal, Montreal, QC, Canada
| | - José Carlos Rivera
- Departments of Pediatrics, Ophthalmology, and Pharmacology, Hôpital Maisonneuve-Rosemont Research Center, 5415 Boul L'Assomption, Montreal, QC, H1T 2 M4, Canada.,Hôpital Sainte Justine Research Centre, Montreal, QC, Canada
| | - Sylvain Chemtob
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada. .,Departments of Pediatrics, Ophthalmology, and Pharmacology, Hôpital Maisonneuve-Rosemont Research Center, 5415 Boul L'Assomption, Montreal, QC, H1T 2 M4, Canada. .,Hôpital Sainte Justine Research Centre, Montreal, QC, Canada.
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7
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Pradel B, Robert-Hebmann V, Espert L. Regulation of Innate Immune Responses by Autophagy: A Goldmine for Viruses. Front Immunol 2020; 11:578038. [PMID: 33123162 PMCID: PMC7573147 DOI: 10.3389/fimmu.2020.578038] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 09/04/2020] [Indexed: 12/19/2022] Open
Abstract
Autophagy is a lysosomal degradation pathway for intracellular components and is highly conserved across eukaryotes. This process is a key player in innate immunity and its activation has anti-microbial effects by directly targeting pathogens and also by regulating innate immune responses. Autophagy dysfunction is often associated with inflammatory diseases. Many studies have shown that it can also play a role in the control of innate immunity by preventing exacerbated inflammation and its harmful effects toward the host. The arms race between hosts and pathogens has led some viruses to evolve strategies that enable them to benefit from autophagy, either by directly hijacking the autophagy pathway for their life cycle, or by using its regulatory functions in innate immunity. The control of viral replication and spread involves the production of anti-viral cytokines. Controlling the signals that lead to production of these cytokines is a perfect way for viruses to escape from innate immune responses and establish successful infection. Published reports related to this last viral strategy have extensively grown in recent years. In this review we describe several links between autophagy and regulation of innate immune responses and we provide an overview of how viruses exploit these links for their own benefit.
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Affiliation(s)
- Baptiste Pradel
- IRIM, University of Montpellier, CNRS UMR 9004, Montpellier, France
| | | | - Lucile Espert
- IRIM, University of Montpellier, CNRS UMR 9004, Montpellier, France
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8
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Girardin SE, Cuziol C, Philpott DJ, Arnoult D. The eIF2α kinase HRI in innate immunity, proteostasis, and mitochondrial stress. FEBS J 2020; 288:3094-3107. [DOI: 10.1111/febs.15553] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/09/2020] [Accepted: 09/01/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Stephen E. Girardin
- Department of Laboratory Medicine and Pathobiology University of Toronto ON Canada
| | - Camille Cuziol
- INSERM UMR_S 1197 Hôpital Paul Brousse Villejuif France
- Université Paris‐Saclay France
| | | | - Damien Arnoult
- INSERM UMR_S 1197 Hôpital Paul Brousse Villejuif France
- Université Paris‐Saclay France
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9
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Rocca C, Pasqua T, Cerra MC, Angelone T. Cardiac Damage in Anthracyclines Therapy: Focus on Oxidative Stress and Inflammation. Antioxid Redox Signal 2020; 32:1081-1097. [PMID: 31928066 DOI: 10.1089/ars.2020.8016] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Significance: Despite their serious side effects, anthracyclines (ANTs) are the most prescribed chemotherapeutic drugs because of their strong efficacy in both solid and hematological tumors. A major limitation to ANTs clinical application is the severe cardiotoxicity observed both acutely and chronically. The mechanism underlying cardiac dysfunction under chemotherapy is mainly dependent on the generation of oxidative stress and systemic inflammation, both of which lead to progressive cardiomyopathy and heart failure. Recent Advances: Over the years, the iatrogenic ANTs-induced cardiotoxicity was believed to be simply given by iron metabolism and reactive oxygen species production; however, several experimental data indicate that ANTs may use alternative damaging mechanisms, such as topoisomerase 2β inhibition, inflammation, pyroptosis, immunometabolism, and autophagy. Critical Issues: In this review, we aimed at discussing ANTs-induced cardiac injury from different points of view, updating and focusing on oxidative stress and inflammation, since these pathways are not exclusive or independent from each other but they together importantly contribute to the complexity of ANTs-induced multifactorial cardiotoxicity. Future Directions: A deeper understanding of the mechanistic signaling leading to ANTs side effects could reveal crucial targeting molecules, thus representing strategic knowledge to promote better therapeutic efficacy and lower cardiotoxicity during clinical application.
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Affiliation(s)
- Carmine Rocca
- Laboratory of Cellular and Molecular Cardiovascular Physiology, Department of Biology, Ecology and Earth Sciences, University of Calabria, Rende, Italy
| | - Teresa Pasqua
- Laboratory of Cellular and Molecular Cardiovascular Physiology, Department of Biology, Ecology and Earth Sciences, University of Calabria, Rende, Italy
| | - Maria Carmela Cerra
- Laboratory of Organ and System Physiology, Department of Biology, Ecology and Earth Sciences, University of Calabria, Rende, Italy.,National Institute of Cardiovascular Research (INRC), Bologna, Italy
| | - Tommaso Angelone
- Laboratory of Cellular and Molecular Cardiovascular Physiology, Department of Biology, Ecology and Earth Sciences, University of Calabria, Rende, Italy.,National Institute of Cardiovascular Research (INRC), Bologna, Italy
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10
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Lim J, Park H, Heisler J, Maculins T, Roose-Girma M, Xu M, Mckenzie B, van Lookeren Campagne M, Newton K, Murthy A. Autophagy regulates inflammatory programmed cell death via turnover of RHIM-domain proteins. eLife 2019; 8:44452. [PMID: 31287416 PMCID: PMC6615860 DOI: 10.7554/elife.44452] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 06/14/2019] [Indexed: 12/19/2022] Open
Abstract
RIPK1, RIPK3, ZBP1 and TRIF, the four mammalian proteins harboring RIP homotypic interaction motif (RHIM) domains, are key components of inflammatory signaling and programmed cell death. RHIM-domain protein activation is mediated by their oligomerization; however, mechanisms that promote a return to homeostasis remain unknown. Here we show that autophagy is critical for the turnover of all RHIM-domain proteins. Macrophages lacking the autophagy gene Atg16l1accumulated highly insoluble forms of RIPK1, RIPK3, TRIF and ZBP1. Defective autophagy enhanced necroptosis by Tumor necrosis factor (TNF) and Toll-like receptor (TLR) ligands. TNF-mediated necroptosis was mediated by RIPK1 kinase activity, whereas TLR3- or TLR4-mediated death was dependent on TRIF and RIPK3. Unexpectedly, combined deletion of Atg16l1 and Zbp1 accelerated LPS-mediated necroptosis and sepsis in mice. Thus, ZBP1 drives necroptosis in the absence of the RIPK1-RHIM, but suppresses this process when multiple RHIM-domain containing proteins accumulate. These findings identify autophagy as a central regulator of innate inflammation governed by RHIM-domain proteins.
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Affiliation(s)
- Junghyun Lim
- Department of Cancer Immunology, Genentech, South San Francisco, United States
| | - Hyunjoo Park
- Department of Translational Immunology, Genentech, South San Francisco, United States
| | - Jason Heisler
- Department of Translational Immunology, Genentech, South San Francisco, United States
| | - Timurs Maculins
- Department of Cancer Immunology, Genentech, South San Francisco, United States
| | - Merone Roose-Girma
- Department of Molecular Biology, Genentech, South San Francisco, United States
| | - Min Xu
- Department of Translational Immunology, Genentech, South San Francisco, United States
| | - Brent Mckenzie
- Department of Translational Immunology, Genentech, South San Francisco, United States
| | | | - Kim Newton
- Department of Physiological Chemistry, Genentech, South San Francisco, United States
| | - Aditya Murthy
- Department of Cancer Immunology, Genentech, South San Francisco, United States
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11
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Shanmugam N, Baker MODG, Ball SR, Steain M, Pham CLL, Sunde M. Microbial functional amyloids serve diverse purposes for structure, adhesion and defence. Biophys Rev 2019; 11:287-302. [PMID: 31049855 PMCID: PMC6557962 DOI: 10.1007/s12551-019-00526-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 04/15/2019] [Indexed: 12/22/2022] Open
Abstract
The functional amyloid state of proteins has in recent years garnered much attention for its role in serving crucial and diverse biological roles. Amyloid is a protein fold characterised by fibrillar morphology, binding of the amyloid-specific dyes Thioflavin T and Congo Red, insolubility and underlying cross-β structure. Amyloids were initially characterised as an aberrant protein fold associated with mammalian disease. However, in the last two decades, functional amyloids have been described in almost all biological systems, from viruses, to bacteria and archaea, to humans. Understanding the structure and role of these amyloids elucidates novel and potentially ancient mechanisms of protein function throughout nature. Many of these microbial functional amyloids are utilised by pathogens for invasion and maintenance of infection. As such, they offer novel avenues for therapies. This review examines the structure and mechanism of known microbial functional amyloids, with a particular focus on the pathogenicity conferred by the production of these structures and the strategies utilised by microbes to interfere with host amyloid structures. The biological importance of microbial amyloid assemblies is highlighted by their ubiquity and diverse functionality.
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Affiliation(s)
- Nirukshan Shanmugam
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Medicine and Health and Sydney Nano, University of Sydney, Sydney, NSW, 2006, Australia
| | - Max O D G Baker
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Medicine and Health and Sydney Nano, University of Sydney, Sydney, NSW, 2006, Australia
| | - Sarah R Ball
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Medicine and Health and Sydney Nano, University of Sydney, Sydney, NSW, 2006, Australia
| | - Megan Steain
- Infectious Diseases and Immunology, Central Clinical School, Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
| | - Chi L L Pham
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Medicine and Health and Sydney Nano, University of Sydney, Sydney, NSW, 2006, Australia
| | - Margaret Sunde
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Medicine and Health and Sydney Nano, University of Sydney, Sydney, NSW, 2006, Australia.
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12
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Gentle IE. Supramolecular Complexes in Cell Death and Inflammation and Their Regulation by Autophagy. Front Cell Dev Biol 2019; 7:73. [PMID: 31131275 PMCID: PMC6509160 DOI: 10.3389/fcell.2019.00073] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 04/10/2019] [Indexed: 12/23/2022] Open
Abstract
Signaling activation is a tightly regulated process involving myriad posttranslational modifications such as phosphorylation/dephosphorylation, ubiquitylation/deubiquitylation, proteolytical cleavage events as well as translocation of proteins to new compartments within the cell. In addition to each of these events potentially regulating individual proteins, the assembly of very large supramolecular complexes has emerged as a common theme in signal transduction and is now known to regulate many signaling events. This is particularly evident in pathways regulating both inflammation and cell death/survival. Regulation of the assembly and silencing of these complexes plays important roles in immune signaling and inflammation and the fate of cells to either die or survive. Here we will give a summary of some of the better studied supramolecular complexes involved in inflammation and cell death, particularly with a focus on diseases caused by their autoactivation and the role autophagy either plays or may be playing in their regulation.
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Affiliation(s)
- Ian E Gentle
- Faculty of Medicine, Institute of Medical Microbiology and Hygiene, Medical Center, University of Freiburg, Freiburg im Breisgau, Germany
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13
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Abstract
Functional amyloids have recently attracted much attention due to their involvement in signalling pathways, with hybrid amyloid formation showcasing a key role in necroptosis. In this issue of EMBO Reports , Sunde and colleagues 1 unveil that hybrid amyloids are central to necroptosis more broadly, uncovering the amyloidal nature of viral‐induced necrosome assemblies. They also prove that the mechanism by which murine cytomegalovirus unleashes necroptosis also relies on hybrid amyloid assembly by viral proteins, akin to that used by host cells. This study presents a way to selectively inhibit necroptosis in which amyloid assembly can be exploited further as a potential therapeutic target.
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Affiliation(s)
- Miguel Mompeán
- Instituto Regional de Investigación Científica Aplicada (IRICA)University of Castile‐La ManchaCiudad RealSpain
- Department of ChemistryColumbia UniversityNew YorkNYUSA
| | - Gunes Bozkurt
- Department of Biological Chemistry and Molecular PharmacologyHarvard Medical SchoolBostonMAUSA
- Program in Cellular and Molecular MedicineBoston Children's HospitalBostonMAUSA
| | - Hao Wu
- Department of Biological Chemistry and Molecular PharmacologyHarvard Medical SchoolBostonMAUSA
- Program in Cellular and Molecular MedicineBoston Children's HospitalBostonMAUSA
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14
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Napoletano F, Baron O, Vandenabeele P, Mollereau B, Fanto M. Intersections between Regulated Cell Death and Autophagy. Trends Cell Biol 2019; 29:323-338. [PMID: 30665736 DOI: 10.1016/j.tcb.2018.12.007] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 12/16/2018] [Accepted: 12/21/2018] [Indexed: 12/17/2022]
Abstract
In multicellular organisms, cell death is an essential aspect of life. Over the past decade, the spectrum of different forms of regulated cell death (RCD) has expanded dramatically with relevance in several pathologies such as inflammatory and neurodegenerative diseases. This has been paralleled by the growing awareness of the central importance of autophagy as a stress response that influences decisions of cell life and cell death. Here, we first introduce criteria and methodologies for correct identification of the different RCD forms. We then discuss how the autophagy machinery is directly associated with specific cell death forms and dissect the complex interactions between autophagy and apoptotic and necrotic cell death. This highlights how the balance of the relationship between other cell death pathways and autophagy presides over life and death in specific cellular contexts.
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Affiliation(s)
- Francesco Napoletano
- Department of Life Sciences, University of Trieste, Via Weiss 2 - Pal. Q, 34128 Trieste, Italy; CIB National Laboratory, Area Science Park, Padriciano 99, 34149, Trieste, Italy
| | - Olga Baron
- Wolfson Centre for Age-Related Disorders, King's College London, Guy's Campus, SE1 1UL, London; Department of Basic and Clinical Neuroscience, King's College London, 125 Coldharbour Lane, SE5 9NU, London, UK
| | - Peter Vandenabeele
- Department of Biomedical Molecular Biology (DBMB), Ghent University, Ghent 9052, Belgium; VIB-UGent Center for Inflammation Research, UGent-VIB, Research Building FSVM, Technologiepark 71, 9052 Ghent, Belgium
| | - Bertrand Mollereau
- Université de Lyon, ENSL, UCBL, CNRS, LBMC, UMS 3444 Biosciences Lyon Gerland, 46 Allée d'Italie, 69007, Lyon, France.
| | - Manolis Fanto
- Department of Basic and Clinical Neuroscience, King's College London, 125 Coldharbour Lane, SE5 9NU, London, UK; Institut du Cerveau et de la Moelle épinière (ICM), 47, bd de l'hôpital, F-75013 Paris, France.
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15
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Martin PK, Marchiando A, Xu R, Rudensky E, Yeung F, Schuster SL, Kernbauer E, Cadwell K. Autophagy proteins suppress protective type I interferon signalling in response to the murine gut microbiota. Nat Microbiol 2018; 3:1131-1141. [PMID: 30202015 PMCID: PMC6179362 DOI: 10.1038/s41564-018-0229-0] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 07/26/2018] [Indexed: 12/17/2022]
Abstract
As a conserved pathway that lies at the intersection between host defence and cellular homeostasis, autophagy serves as a rheostat for immune reactions. In particular, autophagy suppresses excess type I interferon (IFN-I) production in response to viral nucleic acids. It is unknown how this function of autophagy relates to the intestinal barrier where host-microbe interactions are pervasive and perpetual. Here, we demonstrate that mice deficient in autophagy proteins are protected from the intestinal bacterial pathogen Citrobacter rodentium in a manner dependent on IFN-I signalling and nucleic acid sensing pathways. Enhanced IFN-stimulated gene expression in intestinal tissue of autophagy-deficient mice in the absence of infection was mediated by the gut microbiota. Additionally, monocytes infiltrating into the autophagy-deficient intestinal microenvironment displayed an enhanced inflammatory profile and were necessary for protection against C. rodentium. Finally, we demonstrate that the microbiota-dependent IFN-I production that occurs in the autophagy-deficient host also protects against chemical injury of the intestine. Thus, autophagy proteins prevent a spontaneous IFN-I response to microbiota that is beneficial in the presence of infectious and non-infectious intestinal hazards. These results identify a role for autophagy proteins in controlling the magnitude of IFN-I signalling at the intestinal barrier.
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Affiliation(s)
- Patricia K Martin
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY, USA
- Sackler Institute of Graduate Biomedical Sciences, New York University School of Medicine, New York, NY, USA
| | - Amanda Marchiando
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Ruliang Xu
- Department of Pathology, New York University School of Medicine, New York, NY, USA
| | - Eugene Rudensky
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY, USA
- Sackler Institute of Graduate Biomedical Sciences, New York University School of Medicine, New York, NY, USA
| | - Frank Yeung
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY, USA
- Sackler Institute of Graduate Biomedical Sciences, New York University School of Medicine, New York, NY, USA
| | - Samantha L Schuster
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Elisabeth Kernbauer
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Ken Cadwell
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University School of Medicine, New York, NY, USA.
- Department of Microbiology, New York University School of Medicine, New York, NY, USA.
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16
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Liang S, Xinyong C, Hongmin Z, Jing W, Lang H, Ping Z. TLR2 and TLR3 expression as a biomarker for the risk of doxorubicin-induced heart failure. Toxicol Lett 2018; 295:205-211. [PMID: 29959987 DOI: 10.1016/j.toxlet.2018.06.1219] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/19/2018] [Accepted: 06/26/2018] [Indexed: 12/19/2022]
Abstract
Doxorubicin (Dox) is limited in its use because of its adverse effect of inducing irreversible heart dysfunction. Innate immune factors, including toll-like receptors (TLRs), play important roles in most cardiac diseases and doxorubicin-induced cardiotoxicity. In this study, subjects were divided into the following groups: healthy controls (n = 62), HF group (n = 60), Dox group (n = 82), and Dox-HF group (n = 32). Expressions of TLR mRNAs in peripheral blood mononuclear cells were detected by RT-PCR. Western blotting was used to quantify protein expressions of Peripheral blood mononuclear cells (PBMCs) TLRs and their downstream signal proteins. The release of inflammatory factors was detected by ELISA. Results indicated that TLR2 was increased and TLR3 was decreased between the control group and Dox group, and between the Dox group and Dox-HF group. Serum inflammatory factors were comparable between the HF group, the Dox group, and the Dox-HF group. This study suggested that TLR2 and TLR3 are up- and down-regulated, respectively, in doxorubicin-treated patients who develop heart dysfunctions. This may suggest a predictive role for TLR2-TLR3 imbalance in doxorubicin-induced heart failure.
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Affiliation(s)
- Shao Liang
- Department of Cardiology, Jiangxi Provincial People's Hospital, No, 92 Aiguo Road, Donghu District, Nanchang, 330006, Jiangxi, People's Republic of China; Jiang Xi Provincial Institute of Cardiovascular Diseases, No, 92 Aiguo Road, Donghu District, Nanchang, 330006, Jiangxi, People's Republic of China.
| | - Cai Xinyong
- Department of Cardiology, Jiangxi Provincial People's Hospital, No, 92 Aiguo Road, Donghu District, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Zhu Hongmin
- Department of Cardiology, Jiangxi Provincial People's Hospital, No, 92 Aiguo Road, Donghu District, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Wang Jing
- Department of Cardiology, Jiangxi Provincial People's Hospital, No, 92 Aiguo Road, Donghu District, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Hong Lang
- Department of Cardiology, Jiangxi Provincial People's Hospital, No, 92 Aiguo Road, Donghu District, Nanchang, 330006, Jiangxi, People's Republic of China; Jiang Xi Provincial Institute of Cardiovascular Diseases, No, 92 Aiguo Road, Donghu District, Nanchang, 330006, Jiangxi, People's Republic of China.
| | - Zhang Ping
- Department of Neurology, Jiangxi Provincial People's Hospital, No, 92 Aiguo Road, Donghu District, Nanchang, 330006, Jiangxi, People's Republic of China.
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17
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Nanson JD, Rahaman MH, Ve T, Kobe B. Regulation of signaling by cooperative assembly formation in mammalian innate immunity signalosomes by molecular mimics. Semin Cell Dev Biol 2018; 99:96-114. [PMID: 29738879 DOI: 10.1016/j.semcdb.2018.05.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 03/18/2018] [Accepted: 05/04/2018] [Indexed: 12/16/2022]
Abstract
Innate immunity pathways constitute the first line of defense against infections and cellular damage. An emerging concept in these pathways is that signaling involves the formation of finite (e.g. rings in NLRs) or open-ended higher-order assemblies (e.g. filamentous assemblies by members of the death-fold family and TIR domains). This signaling by cooperative assembly formation (SCAF) mechanism allows rapid and strongly amplified responses to minute amounts of stimulus. While the characterization of the molecular mechanisms of SCAF has seen rapid progress, little is known about its regulation. One emerging theme involves proteins produced both in host cells and by pathogens that appear to mimic the signaling components. Recently characterized examples involve the capping of the filamentous assemblies formed by caspase-1 CARDs by the CARD-only protein INCA, and those formed by caspase-8 by the DED-containing protein MC159. By contrast, the CARD-only protein ICEBERG and the DED-containing protein cFLIP incorporate into signaling filaments and presumably interfere with proximity based activation of caspases. We review selected examples of SCAF in innate immunity pathways and focus on the current knowledge on signaling component mimics produced by mammalian and pathogen cells and what is known about their mechanisms of action.
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Affiliation(s)
- Jeffrey D Nanson
- School of Chemistry and Molecular Biosciences, Institute for Molecular Bioscience and Australian Infectious Diseases Research Centre, University of Queensland, Brisbane, QLD, 4072, Australia
| | - Md Habibur Rahaman
- School of Chemistry and Molecular Biosciences, Institute for Molecular Bioscience and Australian Infectious Diseases Research Centre, University of Queensland, Brisbane, QLD, 4072, Australia
| | - Thomas Ve
- School of Chemistry and Molecular Biosciences, Institute for Molecular Bioscience and Australian Infectious Diseases Research Centre, University of Queensland, Brisbane, QLD, 4072, Australia; Institute for Glycomics, Griffith University, Southport, QLD, 4222, Australia
| | - Bostjan Kobe
- School of Chemistry and Molecular Biosciences, Institute for Molecular Bioscience and Australian Infectious Diseases Research Centre, University of Queensland, Brisbane, QLD, 4072, Australia.
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18
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Affiliation(s)
- Junghyun Lim
- Department of Cancer Immunology, Genentech, Inc., 1 DNA Way, South San Francisco, CA, 94080, USA
| | - Aditya Murthy
- Department of Cancer Immunology, Genentech, Inc., 1 DNA Way, South San Francisco, CA, 94080, USA.
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19
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Samie M, Lim J, Verschueren E, Baughman JM, Peng I, Wong A, Kwon Y, Senbabaoglu Y, Hackney JA, Keir M, Mckenzie B, Kirkpatrick DS, van Lookeren Campagne M, Murthy A. Selective autophagy of the adaptor TRIF regulates innate inflammatory signaling. Nat Immunol 2018; 19:246-254. [PMID: 29358708 DOI: 10.1038/s41590-017-0042-6] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 12/15/2017] [Indexed: 12/17/2022]
Abstract
Defective autophagy is linked to diseases such as rheumatoid arthritis, lupus and inflammatory bowel disease (IBD). However, the mechanisms by which autophagy limits inflammation remain poorly understood. Here we found that loss of the autophagy-related gene Atg16l1 promoted accumulation of the adaptor TRIF and downstream signaling in macrophages. Multiplex proteomic profiling identified SQSTM1 and Tax1BP1 as selective autophagy-related receptors that mediated the turnover of TRIF. Knockdown of Tax1bp1 increased production of the cytokines IFN-β and IL-1β. Mice lacking Atg16l1 in myeloid cells succumbed to lipopolysaccharide-mediated sepsis but enhanced their clearance of intestinal Salmonella typhimurium in an interferon receptor-dependent manner. Human macrophages with the Crohn's disease-associated Atg16l1 variant T300A exhibited more production of IFN-β and IL-1β. An elevated interferon-response gene signature was observed in patients with IBD who were resistant to treatment with an antibody to the cytokine TNF. These findings identify selective autophagy as a key regulator of signaling via the innate immune system.
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Affiliation(s)
- Mohammad Samie
- Department of Cancer Immunology, Genentech, South San Francisco, CA, USA
| | - Junghyun Lim
- Department of Cancer Immunology, Genentech, South San Francisco, CA, USA
| | - Erik Verschueren
- Department of Microchemistry, Proteomics & Lipidomics, Genentech, South San Francisco, CA, USA
| | - Joshua M Baughman
- Department of Microchemistry, Proteomics & Lipidomics, Genentech, South San Francisco, CA, USA
| | - Ivan Peng
- Department of Translational Immunology, Genentech, South San Francisco, CA, USA
| | - Aaron Wong
- Department of Translational Immunology, Genentech, South San Francisco, CA, USA
| | - Youngsu Kwon
- Department of Translational Immunology, Genentech, South San Francisco, CA, USA
| | - Yasin Senbabaoglu
- Department of Bioinformatics & Computational Biology, Genentech, South San Francisco, CA, USA
| | - Jason A Hackney
- Department of Bioinformatics & Computational Biology, Genentech, South San Francisco, CA, USA
| | - Mary Keir
- Biomarker Discovery OMNI, Genentech, South San Francisco, CA, USA
| | - Brent Mckenzie
- Department of Translational Immunology, Genentech, South San Francisco, CA, USA
| | - Donald S Kirkpatrick
- Department of Microchemistry, Proteomics & Lipidomics, Genentech, South San Francisco, CA, USA
| | | | - Aditya Murthy
- Department of Cancer Immunology, Genentech, South San Francisco, CA, USA.
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20
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Kleino A, Ramia NF, Bozkurt G, Shen Y, Nailwal H, Huang J, Napetschnig J, Gangloff M, Chan FKM, Wu H, Li J, Silverman N. Peptidoglycan-Sensing Receptors Trigger the Formation of Functional Amyloids of the Adaptor Protein Imd to Initiate Drosophila NF-κB Signaling. Immunity 2017; 47:635-647.e6. [PMID: 29045898 DOI: 10.1016/j.immuni.2017.09.011] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 06/30/2017] [Accepted: 09/20/2017] [Indexed: 12/15/2022]
Abstract
In the Drosophila immune response, bacterial derived diaminopimelic acid-type peptidoglycan binds the receptors PGRP-LC and PGRP-LE, which through interaction with the adaptor protein Imd leads to activation of the NF-κB homolog Relish and robust antimicrobial peptide gene expression. PGRP-LC, PGRP-LE, and Imd each contain a motif with some resemblance to the RIP Homotypic Interaction Motif (RHIM), a domain found in mammalian RIPK proteins forming functional amyloids during necroptosis. Here we found that despite sequence divergence, these Drosophila cryptic RHIMs formed amyloid fibrils in vitro and in cells. Amyloid formation was required for signaling downstream of Imd, and in contrast to the mammalian RHIMs, was not associated with cell death. Furthermore, amyloid formation constituted a regulatable step and could be inhibited by Pirk, an endogenous feedback regulator of this pathway. Thus, diverse sequence motifs are capable of forming amyloidal signaling platforms, and the formation of these platforms may present a regulatory point in multiple biological processes.
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Affiliation(s)
- Anni Kleino
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Nancy F Ramia
- Department of Pathology, Program in Immunology and Microbiology, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Gunes Bozkurt
- Program in Cellular and Molecular Medicine, Boston Children's Hospital and Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA
| | - Yanfang Shen
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Himani Nailwal
- Department of Pathology, Program in Immunology and Microbiology, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Jing Huang
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Johanna Napetschnig
- Department of Biochemistry, Weill Cornell Medical College, New York, NY 10065, USA
| | - Monique Gangloff
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, UK
| | - Francis Ka-Ming Chan
- Department of Pathology, Program in Immunology and Microbiology, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Hao Wu
- Program in Cellular and Molecular Medicine, Boston Children's Hospital and Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Department of Biochemistry, Weill Cornell Medical College, New York, NY 10065, USA.
| | - Jixi Li
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, School of Life Sciences, Fudan University, Shanghai 200438, China.
| | - Neal Silverman
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA.
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21
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Nowikovsky K, Bergmann M. Autophagy regulates apoptosis on the level of the death-inducing signalling complex. FEBS J 2017; 284:1967-1969. [PMID: 28670876 DOI: 10.1111/febs.14119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The interactions between apoptotic and autophagic proteins via the proteolytic systems are known mechanisms through which autophagy and apoptosis regulate each other. In this issue of The FEBS Journal, Gentle and colleagues propose a mechanism through which autophagy regulates the induction of apoptosis at the level of the TIR-domain-containing adaptor-inducing interferon-β (TRIF) in TLR signaling.
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Affiliation(s)
- Karin Nowikovsky
- Department of Internal Medicine I, Medical University Vienna, Austria.,Comprehensive Cancer Center, Vienna, Austria
| | - Michael Bergmann
- Comprehensive Cancer Center, Vienna, Austria.,Department of Surgery, Medical University of Vienna, Austria
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