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Yu J, Li H, Wu Y, Luo M, Chen S, Shen G, Wei X, Shao B. Inhibition of NLRP3 inflammasome activation by A20 through modulation of NEK7. Proc Natl Acad Sci U S A 2024; 121:e2316551121. [PMID: 38865260 PMCID: PMC11194493 DOI: 10.1073/pnas.2316551121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Accepted: 04/24/2024] [Indexed: 06/14/2024] Open
Abstract
The NLRP3 inflammasome, a pivotal component of innate immunity, has been implicated in various inflammatory disorders. The ubiquitin-editing enzyme A20 is well known to regulate inflammation and maintain homeostasis. However, the precise molecular mechanisms by which A20 modulates the NLRP3 inflammasome remain poorly understood. Here, our study revealed that macrophages deficient in A20 exhibit increased protein abundance and elevated mRNA level of NIMA-related kinase 7 (NEK7). Importantly, A20 directly binds with NEK7, mediating its K48-linked ubiquitination, thereby targeting NEK7 for proteasomal degradation. Our results demonstrate that A20 enhances the ubiquitination of NEK7 at K189 and K293 ubiquitinated sites, with K189 playing a crucial role in the binding of NEK7 to A20, albeit not significantly influencing the interaction between NEK7 and NLRP3. Furthermore, A20 disrupts the association of NEK7 with the NLRP3 complex, potentially through the OTU domain and/or synergistic effect of ZnF4 and ZnF7 motifs. Significantly, NEK7 deletion markedly attenuates the activation of the NLRP3 inflammasome in A20-deficient conditions, both in vitro and in vivo. This study uncovers a mechanism by which A20 inhibits the NLRP3 inflammasome.
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Affiliation(s)
- Jiayun Yu
- Department of Radiotherapy, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, Sichuan University, Chengdu610041, China
| | - Hanwen Li
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu610041, China
| | - Yongyao Wu
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu610041, China
| | - Min Luo
- Department of Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu610041, China
| | - Siyuan Chen
- Department of Radiotherapy, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, Sichuan University, Chengdu610041, China
| | - Guobo Shen
- Department of Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu610041, China
| | - Xiawei Wei
- Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy, West China Hospital, National Clinical Research Center for Geriatrics, Sichuan University, Chengdu610041, China
| | - Bin Shao
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu610041, China
- Department of Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu610041, China
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2
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Campos Alonso M, Knobeloch KP. In the moonlight: non-catalytic functions of ubiquitin and ubiquitin-like proteases. Front Mol Biosci 2024; 11:1349509. [PMID: 38455765 PMCID: PMC10919355 DOI: 10.3389/fmolb.2024.1349509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 02/05/2024] [Indexed: 03/09/2024] Open
Abstract
Proteases that cleave ubiquitin or ubiquitin-like proteins (UBLs) are critical players in maintaining the homeostasis of the organism. Concordantly, their dysregulation has been directly linked to various diseases, including cancer, neurodegeneration, developmental aberrations, cardiac disorders and inflammation. Given their potential as novel therapeutic targets, it is essential to fully understand their mechanisms of action. Traditionally, observed effects resulting from deficiencies in deubiquitinases (DUBs) and UBL proteases have often been attributed to the misregulation of substrate modification by ubiquitin or UBLs. Therefore, much research has focused on understanding the catalytic activities of these proteins. However, this view has overlooked the possibility that DUBs and UBL proteases might also have significant non-catalytic functions, which are more prevalent than previously believed and urgently require further investigation. Moreover, multiple examples have shown that either selective loss of only the protease activity or complete absence of these proteins can have different functional and physiological consequences. Furthermore, DUBs and UBL proteases have been shown to often contain domains or binding motifs that not only modulate their catalytic activity but can also mediate entirely different functions. This review aims to shed light on the non-catalytic, moonlighting functions of DUBs and UBL proteases, which extend beyond the hydrolysis of ubiquitin and UBL chains and are just beginning to emerge.
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Affiliation(s)
- Marta Campos Alonso
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Klaus-Peter Knobeloch
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- CIBSS—Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany
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3
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Li J, Liu S, Li S. Mechanisms underlying linear ubiquitination and implications in tumorigenesis and drug discovery. Cell Commun Signal 2023; 21:340. [PMID: 38017534 PMCID: PMC10685518 DOI: 10.1186/s12964-023-01239-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 07/19/2023] [Indexed: 11/30/2023] Open
Abstract
Linear ubiquitination is a distinct type of ubiquitination that involves attaching a head-to-tail polyubiquitin chain to a substrate protein. Early studies found that linear ubiquitin chains are essential for the TNFα- and IL-1-mediated NF-κB signaling pathways. However, recent studies have discovered at least sixteen linear ubiquitination substrates, which exhibit a broader activity than expected and mediate many other signaling pathways beyond NF-κB signaling. Dysregulation of linear ubiquitination in these pathways has been linked to many types of cancers, such as lymphoma, liver cancer, and breast cancer. Since the discovery of linear ubiquitin, extensive effort has been made to delineate the molecular mechanisms of how dysregulation of linear ubiquitination causes tumorigenesis and cancer development. In this review, we highlight newly discovered linear ubiquitination-mediated signaling pathways, recent advances in the role of linear ubiquitin in different types of cancers, and the development of linear ubiquitin inhibitors. Video Abstract.
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Affiliation(s)
- Jack Li
- Department of Biosciences, Rice University, Houston, TX, 77005, USA
| | - Sijin Liu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China.
| | - Shitao Li
- Department of Microbiology and Immunology, Tulane University, New Orleans, LA, 70112, USA.
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4
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Xu X, Wang Y, Zhang Y, Wang Y, Yin Y, Peng C, Gong X, Li M, Zhang Y, Zhang M, Tang Y, Zhou X, Liu H, Pan L. Mechanistic insights into the enzymatic activity of E3 ligase HOIL-1L and its regulation by the linear ubiquitin chain binding. SCIENCE ADVANCES 2023; 9:eadi4599. [PMID: 37831767 PMCID: PMC10575588 DOI: 10.1126/sciadv.adi4599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 09/11/2023] [Indexed: 10/15/2023]
Abstract
Heme-oxidized IRP2 ubiquitin ligase 1 (HOIL-1L) serves as a unique E3 ligase to catalyze the mono-ubiquitination of relevant protein or sugar substrates and plays vital roles in numerous cellular processes in mammals. However, the molecular mechanism underpinning the E3 activity of HOIL-1L and the related regulatory mechanism remain elusive. Here, we report the crystal structure of the catalytic core region of HOIL-1L and unveil the key catalytic triad residues of HOIL-1L. Moreover, we discover that HOIL-1L contains two distinct linear di-ubiquitin binding sites that can synergistically bind to linear tetra-ubiquitin, and the binding of HOIL-1L with linear tetra-ubiquitin can promote its E3 activity. The determined HOIL-1L/linear tetra-ubiquitin complex structure not only elucidates the detailed binding mechanism of HOIL-1L with linear tetra-ubiquitin but also uncovers a unique allosteric ubiquitin-binding site for the activation of HOIL-1L. In all, our findings provide mechanistic insights into the E3 activity of HOIL-1L and its regulation by the linear ubiquitin chain binding.
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Affiliation(s)
- Xiaolong Xu
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yaru Wang
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yan Zhang
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China
| | - Yingli Wang
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yue Yin
- National Facility for Protein Science in Shanghai, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201210, China
| | - Chao Peng
- National Facility for Protein Science in Shanghai, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201210, China
| | - Xinyu Gong
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Miao Li
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
| | - Yuchao Zhang
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Mingfang Zhang
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yubin Tang
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Xindi Zhou
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Haobo Liu
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Lifeng Pan
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
- State Key Laboratory of Chemical Biology, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
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5
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Song Z, Wu W, Wei W, Xiao W, Lei M, Cai KQ, Huang DW, Jeong S, Zhang JP, Wang H, Kadin ME, Waldmann TA, Staudt LM, Nakagawa M, Yang Y. Analysis and therapeutic targeting of the IL-1R pathway in anaplastic large cell lymphoma. Blood 2023; 142:1297-1311. [PMID: 37339580 PMCID: PMC10613726 DOI: 10.1182/blood.2022019166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 05/11/2023] [Accepted: 06/01/2023] [Indexed: 06/22/2023] Open
Abstract
Anaplastic large cell lymphoma (ALCL), a subgroup of mature T-cell neoplasms with an aggressive clinical course, is characterized by elevated expression of CD30 and anaplastic cytology. To achieve a comprehensive understanding of the molecular characteristics of ALCL pathology and to identify therapeutic vulnerabilities, we applied genome-wide CRISPR library screenings to both anaplastic lymphoma kinase positive (ALK+) and primary cutaneous (pC) ALK- ALCLs and identified an unexpected role of the interleukin-1R (IL-1R) inflammatory pathway in supporting the viability of pC ALK- ALCL. Importantly, this pathway is activated by IL-1α in an autocrine manner, which is essential for the induction and maintenance of protumorigenic inflammatory responses in pC-ALCL cell lines and primary cases. Hyperactivation of the IL-1R pathway is promoted by the A20 loss-of-function mutation in the pC-ALCL lines we analyze and is regulated by the nonproteolytic protein ubiquitination network. Furthermore, the IL-1R pathway promotes JAK-STAT3 signaling activation in ALCLs lacking STAT3 gain-of-function mutation or ALK translocation and enhances the sensitivity of JAK inhibitors in these tumors in vitro and in vivo. Finally, the JAK2/IRAK1 dual inhibitor, pacritinib, exhibited strong activities against pC ALK- ALCL, where the IL-1R pathway is hyperactivated in the cell line and xenograft mouse model. Thus, our studies revealed critical insights into the essential roles of the IL-1R pathway in pC-ALCL and provided opportunities for developing novel therapeutic strategies.
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Affiliation(s)
- Zhihui Song
- Blood Cell Development and Function Program, Fox Chase Cancer Center, Philadelphia, PA
| | - Wenjun Wu
- Blood Cell Development and Function Program, Fox Chase Cancer Center, Philadelphia, PA
| | - Wei Wei
- Blood Cell Development and Function Program, Fox Chase Cancer Center, Philadelphia, PA
| | - Wenming Xiao
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD
| | - Michelle Lei
- Blood Cell Development and Function Program, Fox Chase Cancer Center, Philadelphia, PA
| | - Kathy Q. Cai
- Histopathology Facility, Fox Chase Cancer Center, Philadelphia, PA
| | - Da Wei Huang
- Lymphoid Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Subin Jeong
- Blood Cell Development and Function Program, Fox Chase Cancer Center, Philadelphia, PA
| | - Jing-Ping Zhang
- Blood Cell Development and Function Program, Fox Chase Cancer Center, Philadelphia, PA
| | - Hongbo Wang
- Blood Cell Development and Function Program, Fox Chase Cancer Center, Philadelphia, PA
| | - Marshall E. Kadin
- Department of Pathology and Laboratory Medicine, Brown University Alpert School of Medicine, Providence, RI
| | - Thomas A. Waldmann
- Lymphoid Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Louis M. Staudt
- Lymphoid Malignancies Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Masao Nakagawa
- Department of Hematology, Hokkaido University Faculty of Medicine, Sapporo, Japan
| | - Yibin Yang
- Blood Cell Development and Function Program, Fox Chase Cancer Center, Philadelphia, PA
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Li Z, Liu B, Lambertsen KL, Clausen BH, Zhu Z, Du X, Xu Y, Poulsen FR, Halle B, Bonde C, Chen M, Wang X, Schlüter D, Huang J, Waisman A, Song W, Wang X. USP25 Inhibits Neuroinflammatory Responses After Cerebral Ischemic Stroke by Deubiquitinating TAB2. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2301641. [PMID: 37587766 PMCID: PMC10558664 DOI: 10.1002/advs.202301641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 07/26/2023] [Indexed: 08/18/2023]
Abstract
Cerebral ischemic stroke is a leading cause of morbidity and mortality globally. However, the mechanisms underlying ischemic stroke injury remain poorly understood. Here, it is found that deficiency of the ubiquitin-specific protease USP25 significantly aggravate ischemic stroke injury in mice. USP25 has no impact on neuronal death under hypoxic conditions, but reduced ischemic stroke-induced neuronal loss and neurological deficits by inhibiting microglia-mediated neuroinflammation. Mechanistically, USP25 restricts the activation of NF-κB and MAPK signaling by regulating TAB2. As a deubiquitinating enzyme, USP25 removeds K63-specific polyubiquitin chains from TAB2. AAV9-mediated TAB2 knockdown ameliorates ischemic stroke injury and abolishes the effect of USP25 deletion. In both mouse and human brains, USP25 is markedly upregulated in microglia in the ischemic penumbra, implying a clinical relevance of USP25 in ischemic stroke. Collectively, USP25 is identified as a critical inhibitor of ischemic stroke injury and this data suggest USP25 may serve as a therapeutic target for ischemic stroke.
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Affiliation(s)
- Zhongding Li
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health)School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhou325035China
- Department of Neurological RehabilitationThe Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical UniversityWenzhou325027China
| | - Baohua Liu
- Department of Neurological RehabilitationThe Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical UniversityWenzhou325027China
| | - Kate Lykke Lambertsen
- Department of Neurobiology ResearchInstitute of Molecular MedicineUniversity of Southern DenmarkOdense C5000Denmark
- BRIDGE – Brain Research – Inter Disciplinary Guided ExcellenceDepartment of Clinical ResearchUniversity of Southern DenmarkOdense C5000Denmark
- Department of NeurologyOdense University HospitalOdense C5000Denmark
| | - Bettina Hjelm Clausen
- Department of Neurobiology ResearchInstitute of Molecular MedicineUniversity of Southern DenmarkOdense C5000Denmark
- BRIDGE – Brain Research – Inter Disciplinary Guided ExcellenceDepartment of Clinical ResearchUniversity of Southern DenmarkOdense C5000Denmark
| | - Zhenhu Zhu
- School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhou325035China
| | - Xue Du
- School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhou325035China
| | - Yanqi Xu
- School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhou325035China
| | - Frantz Rom Poulsen
- BRIDGE – Brain Research – Inter Disciplinary Guided ExcellenceDepartment of Clinical ResearchUniversity of Southern DenmarkOdense C5000Denmark
- Department of NeurosurgeryOdense University HospitalOdense C5000Denmark
| | - Bo Halle
- BRIDGE – Brain Research – Inter Disciplinary Guided ExcellenceDepartment of Clinical ResearchUniversity of Southern DenmarkOdense C5000Denmark
- Department of NeurosurgeryOdense University HospitalOdense C5000Denmark
| | - Christian Bonde
- BRIDGE – Brain Research – Inter Disciplinary Guided ExcellenceDepartment of Clinical ResearchUniversity of Southern DenmarkOdense C5000Denmark
- Department of NeurosurgeryOdense University HospitalOdense C5000Denmark
| | - Meng Chen
- Department of Neurological RehabilitationThe Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical UniversityWenzhou325027China
| | - Xue Wang
- School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhou325035China
| | - Dirk Schlüter
- Institute of Medical Microbiology and Hospital EpidemiologyHannover Medical School30625HannoverGermany
| | - Jingyong Huang
- Department of Vascular SurgeryThe First Affiliated Hospital of Wenzhou Medical UniversityWenzhou325015China
| | - Ari Waisman
- Institute for Molecular MedicineJohannes Gutenberg University Mainz55131MainzGermany
| | - Weihong Song
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health)School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhou325035China
- Key Laboratory of Alzheimer's Disease of Zhejiang ProvinceInstitute of AgingWenzhou Medical UniversityWenzhou325035China
| | - Xu Wang
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health)School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhou325035China
- Department of Neurological RehabilitationThe Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical UniversityWenzhou325027China
- Key Laboratory of Alzheimer's Disease of Zhejiang ProvinceInstitute of AgingWenzhou Medical UniversityWenzhou325035China
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7
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Holgado A, Liu Z, Aidarova A, Mueller C, Haegman M, Driege Y, Kreike M, Scott CL, Afonina IS, Beyaert R. A20 is a master switch of IL-33 signaling in macrophages and determines IL-33-induced lung immunity. J Allergy Clin Immunol 2023; 152:244-256.e4. [PMID: 36898482 DOI: 10.1016/j.jaci.2023.02.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 01/17/2023] [Accepted: 02/06/2023] [Indexed: 03/11/2023]
Abstract
BACKGROUND IL-33 plays a major role in the pathogenesis of allergic diseases such as asthma and atopic dermatitis. On its release from lung epithelial cells, IL-33 primarily drives type 2 immune responses, accompanied by eosinophilia and robust production of IL-4, IL-5, and IL-13. However, several studies show that IL-33 can also drive a type 1 immune response. OBJECTIVE We sought to determine the role of A20 in the regulation of IL-33 signaling in macrophages and IL-33-induced lung immunity. METHODS We studied the immunologic response in lungs of IL-33-treated mice that specifically lack A20 in myeloid cells. We also analyzed IL-33 signaling in A20-deficient bone marrow-derived macrophages. RESULTS IL-33-induced lung innate lymphoid cell type 2 expansion, type 2 cytokine production, and eosinophilia were drastically reduced in the absence of macrophage A20 expression, whereas neutrophils and interstitial macrophages in lungs were increased. In vitro, IL-33-mediated nuclear factor kappa B activation was only weakly affected in A20-deficient macrophages. However, in the absence of A20, IL-33 gained the ability to activate signal transducer and activator of transcription 1 (STAT1) signaling and STAT1-dependent gene expression. Surprisingly, A20-deficient macrophages produced IFN-γ in response to IL-33, which was fully STAT1-dependent. Furthermore, STAT1 deficiency partially restored the ability of IL-33 to induce ILC2 expansion and eosinophilia in myeloid cell-specific A20 knockout mice. CONCLUSIONS We reveal a novel role for A20 as a negative regulator of IL-33-induced STAT1 signaling and IFN-γ production in macrophages, which determines lung immune responses.
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Affiliation(s)
- Aurora Holgado
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Zhuangzhuang Liu
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium; Laboratory of Myeloid Cell Biology in Tissue Damage and Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Aigerim Aidarova
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Christina Mueller
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Mira Haegman
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Yasmine Driege
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Marja Kreike
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Charlotte L Scott
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium; Laboratory of Myeloid Cell Biology in Tissue Damage and Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Inna S Afonina
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Rudi Beyaert
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
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8
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Wang X, Xiao Y, Dong Y, Wang Z, Yi J, Wang J, Wang X, Zhou H, Zhang L, Shi Y. A20 interacts with mTORC2 to inhibit the mTORC2/Akt/Rac1 signaling axis in hepatocellular carcinoma cells. Cancer Gene Ther 2023; 30:424-436. [PMID: 36411371 DOI: 10.1038/s41417-022-00562-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 11/01/2022] [Accepted: 11/08/2022] [Indexed: 11/23/2022]
Abstract
A20 acts as a tumor suppressor in hepatocellular carcinoma, especially inhibiting metastasis of the malignant cells. However, the mechanisms whereby A20 plays the inhibitory roles are not understood completely. Rac1 signaling is essential for cell migration in hepatocellular carcinoma metastasis. Nevertheless, it is not known whether and how A20 inhibits Rac1 signaling to suppress the migration of hepatocellular carcinoma cell. Thereby, we analyzed the relationship between A20 and Rac1 activation, as well as the activity of Akt and mTORC2, two signaling components upstream of Rac1, using gain and loss of function experiments. We found that the overexpression of A20 repressed, while the knockdown or knockout of A20 promoted, the activation of Rac1, Akt and mTORC2 in hepatocellular carcinoma cells. Moreover, the inhibitory effect of A20 on the mTORC2/Akt/Rac1 signaling axis was due to the interaction between A20 and mTORC2 complex. The binding of A20 to mTORC2 was mediated by the ZnF7 domain of A20 and M1 ubiquitin chain in the mTORC2 complex. Furthermore, A20 inhibited metastasis of hepatocellular carcinoma cells via restraining mTORC2 in a hepatocellular carcinoma xenograft mouse model. These findings revealed the relationship between A20 and mTORC2, and explained the molecular mechanisms of A20 in inhibition of hepatocellular carcinoma metastasis.
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Affiliation(s)
- Xinyu Wang
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Ying Xiao
- Laboratory of Cellular and Molecular Medicine, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yanlei Dong
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Zhida Wang
- Department of Clinical Laboratory, Shandong Second Provincial General Hospital, Jinan, China
| | - Jing Yi
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Jianing Wang
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Xiaoyan Wang
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Huaiyu Zhou
- Department of Pathogen Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Lining Zhang
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Yongyu Shi
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
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9
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Martens A, Hertens P, Priem D, Rinotas V, Meletakos T, Gennadi M, Van Hove L, Louagie E, Coudenys J, De Muynck A, Gaublomme D, Sze M, van Hengel J, Catrysse L, Hoste E, Zajac JD, Davey RA, Van Hoorebeke L, Hochepied T, Bertrand MJM, Armaka M, Elewaut D, van Loo G. A20 controls RANK-dependent osteoclast formation and bone physiology. EMBO Rep 2022; 23:e55233. [PMID: 36194667 PMCID: PMC9724664 DOI: 10.15252/embr.202255233] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 09/07/2022] [Accepted: 09/22/2022] [Indexed: 11/05/2022] Open
Abstract
The anti-inflammatory protein A20 serves as a critical brake on NF-κB signaling and NF-κB-dependent inflammation. In humans, polymorphisms in or near the TNFAIP3/A20 gene have been associated with several inflammatory disorders, including rheumatoid arthritis (RA), and experimental studies in mice have demonstrated that myeloid-specific A20 deficiency causes the development of a severe polyarthritis resembling human RA. Myeloid A20 deficiency also promotes osteoclastogenesis in mice, suggesting a role for A20 in the regulation of osteoclast differentiation and bone formation. We show here that osteoclast-specific A20 knockout mice develop severe osteoporosis, but not inflammatory arthritis. In vitro, osteoclast precursor cells from A20 deficient mice are hyper-responsive to RANKL-induced osteoclastogenesis. Mechanistically, we show that A20 is recruited to the RANK receptor complex within minutes of ligand binding, where it restrains NF-κB activation independently of its deubiquitinating activity but through its zinc finger (ZnF) 4 and 7 ubiquitin-binding functions. Together, these data demonstrate that A20 acts as a regulator of RANK-induced NF-κB signaling to control osteoclast differentiation, assuring proper bone development and turnover.
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Affiliation(s)
- Arne Martens
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Pieter Hertens
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Dario Priem
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Vagelis Rinotas
- Biomedical Sciences Research Center 'Alexander Fleming'VariGreece
| | | | - Meropi Gennadi
- Biomedical Sciences Research Center 'Alexander Fleming'VariGreece
| | - Lisette Van Hove
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Els Louagie
- Center for Inflammation Research VIBGhentBelgium
- Department of RheumatologyGhent University HospitalGhentBelgium
| | - Julie Coudenys
- Center for Inflammation Research VIBGhentBelgium
- Department of RheumatologyGhent University HospitalGhentBelgium
| | | | - Djoere Gaublomme
- Center for Inflammation Research VIBGhentBelgium
- Department of RheumatologyGhent University HospitalGhentBelgium
| | - Mozes Sze
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | | | - Leen Catrysse
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Esther Hoste
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Jeffrey D Zajac
- Department of Medicine, Austin HealthUniversity of MelbourneHeidelbergVictoriaAustralia
| | - Rachel A Davey
- Department of Medicine, Austin HealthUniversity of MelbourneHeidelbergVictoriaAustralia
| | | | - Tino Hochepied
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Mathieu J M Bertrand
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
| | - Marietta Armaka
- Biomedical Sciences Research Center 'Alexander Fleming'VariGreece
| | - Dirk Elewaut
- Center for Inflammation Research VIBGhentBelgium
- Department of RheumatologyGhent University HospitalGhentBelgium
| | - Geert van Loo
- Center for Inflammation Research VIBGhentBelgium
- Department of Biomedical Molecular BiologyGhent UniversityGhentBelgium
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10
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The resurrection of RIP kinase 1 as an early cell death checkpoint regulator-a potential target for therapy in the necroptosis era. EXPERIMENTAL & MOLECULAR MEDICINE 2022; 54:1401-1411. [PMID: 36171264 PMCID: PMC9534832 DOI: 10.1038/s12276-022-00847-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/07/2022] [Accepted: 07/15/2022] [Indexed: 01/05/2023]
Abstract
Receptor-interacting serine threonine protein kinase 1 (RIPK1) has emerged as a central molecular switch in controlling the balance between cell survival and cell death. The pro-survival role of RIPK1 in maintaining cell survival is achieved via its ability to induce NF-κB-dependent expression of anti-apoptotic genes. However, recent advances have identified the pro-death function of RIPK1: posttranslational modifications of RIPK1 in the tumor necrosis factor receptor 1 (TNFR1)-associated complex-I, in the cytosolic complex-IIb or in necrosomes regulate the cytotoxic potential of RIPK1, forming an early cell death checkpoint. Since the kinase activity of RIPK1 is indispensable in RIPK3- and MLKL-mediated necroptosis induction, while it is dispensable in apoptosis, a better understanding of this early cell death checkpoint via RIPK1 might lead to new insights into the molecular mechanisms controlling both apoptotic and necroptotic modes of cell death and help develop novel therapeutic approaches for cancer. Here, we present an emerging view of the regulatory mechanisms for RIPK1 activity, especially with respect to the early cell death checkpoint. We also discuss the impact of dysregulated RIPK1 activity in pathophysiological settings and highlight its therapeutic potential in treating human diseases. Improved understanding of the molecular mechanisms that allow a protein to control the balance between cell survival or early death could reveal new approaches to treating conditions including chronic inflammatory disease and cancer. Gang Min Hur and colleagues at Chungnam National University in Daejeon, South Korea, with Han-Ming Shen at the University of Macau in China, review emerging evidence about how the protein called receptor-interacting serine/threonine-protein kinase 1 (RIPK1) influences whether cells move towards death or survival at a key ‘checkpoint’ in cell development. Cells can undergo a natural process of programmed cell death called apoptosis, die abnormally in a disease process called necroptosis, or survive. RIPK1 appears able to influence which path is chosen depending on which genes it regulates and which proteins it interacts with. Many details are still unclear, and need further investigation.
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11
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Chen L, Zhang X, Ou Y, Liu M, Yu D, Song Z, Niu L, Zhang L, Shi J. Advances in RIPK1 kinase inhibitors. Front Pharmacol 2022; 13:976435. [PMID: 36249746 PMCID: PMC9554302 DOI: 10.3389/fphar.2022.976435] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/08/2022] [Indexed: 01/27/2023] Open
Abstract
Programmed necrosis is a new modulated cell death mode with necrotizing morphological characteristics. Receptor interacting protein 1 (RIPK1) is a critical mediator of the programmed necrosis pathway that is involved in stroke, myocardial infarction, fatal systemic inflammatory response syndrome, Alzheimer's disease, and malignancy. At present, the reported inhibitors are divided into four categories. The first category is the type I ATP-competitive kinase inhibitors that targets the area occupied by the ATP adenylate ring; The second category is type Ⅱ ATP competitive kinase inhibitors targeting the DLG-out conformation of RIPK1; The third category is type Ⅲ kinase inhibitors that compete for binding to allosteric sites near ATP pockets; The last category is others. This paper reviews the structure, biological function, and recent research progress of receptor interaction protein-1 kinase inhibitors.
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Affiliation(s)
- Lu Chen
- Department of Pharmacy, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China,Personalized Drug Therapy Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Xiaoqin Zhang
- Department of Critical Care Medicine, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, Affiliated Hospital of University of Electronic Science and Technology of China, Chengdu, Sichuan, China
| | - Yaqing Ou
- Department of Pharmacy, The Affiliated Chengdu 363 Hospital of Southwest Medical University, Chengdu, Sichuan, China
| | - Maoyu Liu
- Department of Pharmacy, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China,Personalized Drug Therapy Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Dongke Yu
- Department of Pharmacy, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China,Personalized Drug Therapy Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Zhiheng Song
- Suzhou University of Science and Technology, Suzhou, Jiangsu, China
| | - Lihong Niu
- Institute of Laboratory Animal Sciences, Academy of Medical Sciences and Sichuan Provincial People’s Hospital, Chengdu, Sichuan, China,*Correspondence: Lihong Niu, ; Lijuan Zhang, ; Jianyou Shi,
| | - Lijuan Zhang
- Department of Pharmacy, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China,Personalized Drug Therapy Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China,*Correspondence: Lihong Niu, ; Lijuan Zhang, ; Jianyou Shi,
| | - Jianyou Shi
- Department of Pharmacy, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China,Personalized Drug Therapy Key Laboratory of Sichuan Province, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China,*Correspondence: Lihong Niu, ; Lijuan Zhang, ; Jianyou Shi,
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12
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Chen Y, Ren W, Wang Q, He Y, Ma D, Cai Z. The regulation of necroptosis by ubiquitylation. Apoptosis 2022; 27:668-684. [PMID: 35939135 DOI: 10.1007/s10495-022-01755-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/15/2022] [Indexed: 12/01/2022]
Abstract
Necroptosis is a programmed necrosis that is mediated by receptor-interacting protein kinases RIPK1, RIPK3 and the mixed lineage kinase domain-like protein, MLKL. Necroptosis must be strictly regulated to maintain normal tissue homeostasis, and dysregulation of necroptosis leads to the development of various inflammatory, infectious, and degenerative diseases. Ubiquitylation is a widespread post-translational modification that is essential for balancing numerous physiological processes. Over the past decade, considerable progress has been made in the understanding of the role of ubiquitylation in regulating necroptosis. Here, we will discuss the regulatory functions of ubiquitylation in necroptosis signaling pathway. An enhanced understanding of the ubiquitylation enzymes and regulatory proteins in necroptotic signaling pathway will be exploited for the development of new therapeutic strategies for necroptosis-related diseases.
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Affiliation(s)
- Yiliang Chen
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200092, China.,Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai, 200120, China
| | - Wenqing Ren
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200092, China
| | - Qingsong Wang
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, Ningxia Hui Autonomous Region, China
| | - Yuan He
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200092, China
| | - Dan Ma
- Department of General Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing, 400037, China
| | - Zhenyu Cai
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200092, China. .,Department of Biochemistry and Molecular Biology, School of Medicine, Tongji University, Shanghai, 200120, China. .,College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, Ningxia Hui Autonomous Region, China.
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13
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Deubiquitinases in cell death and inflammation. Biochem J 2022; 479:1103-1119. [PMID: 35608338 PMCID: PMC9162465 DOI: 10.1042/bcj20210735] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/07/2022] [Accepted: 05/10/2022] [Indexed: 11/20/2022]
Abstract
Apoptosis, pyroptosis, and necroptosis are distinct forms of programmed cell death that eliminate infected, damaged, or obsolete cells. Many proteins that regulate or are a part of the cell death machinery undergo ubiquitination, a post-translational modification made by ubiquitin ligases that modulates protein abundance, localization, and/or activity. For example, some ubiquitin chains target proteins for degradation, while others function as scaffolds for the assembly of signaling complexes. Deubiquitinases (DUBs) are the proteases that counteract ubiquitin ligases by cleaving ubiquitin from their protein substrates. Here, we review the DUBs that have been found to suppress or promote apoptosis, pyroptosis, or necroptosis.
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14
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RIP1 post-translational modifications. Biochem J 2022; 479:929-951. [PMID: 35522161 DOI: 10.1042/bcj20210725] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 04/13/2022] [Accepted: 04/19/2022] [Indexed: 11/17/2022]
Abstract
Receptor interacting protein 1 (RIP1) kinase is a critical regulator of inflammation and cell death signaling, and plays a crucial role in maintaining immune responses and proper tissue homeostasis. Mounting evidence argues for the importance of RIP1 post-translational modifications in control of its function. Ubiquitination by E3 ligases, such as inhibitors of apoptosis (IAP) proteins and LUBAC, as well as the reversal of these modifications by deubiquitinating enzymes, such as A20 and CYLD, can greatly influence RIP1 mediated signaling. In addition, cleavage by caspase-8, RIP1 autophosphorylation, and phosphorylation by a number of signaling kinases can greatly impact cellular fate. Disruption of the tightly regulated RIP1 modifications can lead to signaling disbalance in TNF and/or TLR controlled and other inflammatory pathways, and result in severe human pathologies. This review will focus on RIP1 and its many modifications with an emphasis on ubiquitination, phosphorylation, and cleavage, and their functional impact on the RIP1's role in signaling pathways.
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15
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Yin H, Karayel O, Chao YY, Seeholzer T, Hamp I, Plettenburg O, Gehring T, Zielinski C, Mann M, Krappmann D. A20 and ABIN-1 cooperate in balancing CBM complex-triggered NF-κB signaling in activated T cells. Cell Mol Life Sci 2022; 79:112. [PMID: 35099607 PMCID: PMC8803816 DOI: 10.1007/s00018-022-04154-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 01/06/2022] [Accepted: 01/15/2022] [Indexed: 11/03/2022]
Abstract
T cell activation initiates protective adaptive immunity, but counterbalancing mechanisms are critical to prevent overshooting responses and to maintain immune homeostasis. The CARD11-BCL10-MALT1 (CBM) complex bridges T cell receptor engagement to NF-κB signaling and MALT1 protease activation. Here, we show that ABIN-1 is modulating the suppressive function of A20 in T cells. Using quantitative mass spectrometry, we identified ABIN-1 as an interactor of the CBM signalosome in activated T cells. A20 and ABIN-1 counteract inducible activation of human primary CD4 and Jurkat T cells. While A20 overexpression is able to silence CBM complex-triggered NF-κB and MALT1 protease activation independent of ABIN-1, the negative regulatory function of ABIN-1 depends on A20. The suppressive function of A20 in T cells relies on ubiquitin binding through the C-terminal zinc finger (ZnF)4/7 motifs, but does not involve the deubiquitinating activity of the OTU domain. Our mechanistic studies reveal that the A20/ABIN-1 module is recruited to the CBM complex via A20 ZnF4/7 and that proteasomal degradation of A20 and ABIN-1 releases the CBM complex from the negative impact of both regulators. Ubiquitin binding to A20 ZnF4/7 promotes destructive K48-polyubiquitination to itself and to ABIN-1. Further, after prolonged T cell stimulation, ABIN-1 antagonizes MALT1-catalyzed cleavage of re-synthesized A20 and thereby diminishes sustained CBM complex signaling. Taken together, interdependent post-translational mechanisms are tightly controlling expression and activity of the A20/ABIN-1 silencing module and the cooperative action of both negative regulators is critical to balance CBM complex signaling and T cell activation.
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Affiliation(s)
- Hongli Yin
- Research Unit Cellular Signal Integration, Molecular Targets and Therapeutics Center, Helmholtz Zentrum München-German Research Center for Environmental Health, Ingolstaedter Landstr. 1, 85764, Neuherberg, Germany
| | - Ozge Karayel
- Department of Proteomics and Signal Transduction, Max-Planck Institute of Biochemistry, Martinsried, Germany
| | - Ying-Yin Chao
- Department of Infection Immunology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute and Friedrich Schiller University Jena, Jena, Germany.,Central Institute for Translational Cancer Research (TranslaTUM), Technical University of Munich, Munich, Germany
| | - Thomas Seeholzer
- Research Unit Cellular Signal Integration, Molecular Targets and Therapeutics Center, Helmholtz Zentrum München-German Research Center for Environmental Health, Ingolstaedter Landstr. 1, 85764, Neuherberg, Germany
| | - Isabel Hamp
- Institute for Medicinal Chemistry, Molecular Targets and Therapeutics Center, Helmholtz Zentrum München-German Research Center for Environmental Health, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Institute of Organic Chemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Oliver Plettenburg
- Institute for Medicinal Chemistry, Molecular Targets and Therapeutics Center, Helmholtz Zentrum München-German Research Center for Environmental Health, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Institute of Organic Chemistry, Leibniz Universität Hannover, 30167, Hannover, Germany
| | - Torben Gehring
- Research Unit Cellular Signal Integration, Molecular Targets and Therapeutics Center, Helmholtz Zentrum München-German Research Center for Environmental Health, Ingolstaedter Landstr. 1, 85764, Neuherberg, Germany
| | - Christina Zielinski
- Department of Infection Immunology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute and Friedrich Schiller University Jena, Jena, Germany
| | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max-Planck Institute of Biochemistry, Martinsried, Germany
| | - Daniel Krappmann
- Research Unit Cellular Signal Integration, Molecular Targets and Therapeutics Center, Helmholtz Zentrum München-German Research Center for Environmental Health, Ingolstaedter Landstr. 1, 85764, Neuherberg, Germany.
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16
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A20 undermines alternative NF-κB activity and expression of anti-apoptotic genes in Helicobacter pylori infection. Cell Mol Life Sci 2022; 79:102. [PMID: 35089437 PMCID: PMC8799570 DOI: 10.1007/s00018-022-04139-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 12/16/2021] [Accepted: 01/08/2022] [Indexed: 12/16/2022]
Abstract
A hallmark of infection by the pathogen Helicobacter pylori, which colonizes the human gastric epithelium, is the simultaneous activation of the classical and alternative nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) pathways, underlying inflammation and cell survival. Here, we report that the classical NF-κB target gene product A20 contributes to the negative regulation of alternative NF-κB signaling in gastric epithelial cells infected by H. pylori. Mechanistically, the de novo synthesized A20 protein interacts with tumor necrosis factor receptor-associated factor-interacting protein with forkhead-associated domain (TIFA) and thereby interferes with the association of TIFA with the NIK regulatory complex. We also show that alternative NF-κB activity contributes to the up-regulation of anti-apoptotic genes, such as baculoviral IAP repeat containing 2 (BIRC2), BIRC3 and B-cell lymphoma 2-related protein A1 (BCL2A1) in gastric epithelial cells. Furthermore, the observed over-expression of RelB in human gastric biopsies with type B gastritis and RelB-dependent suppression of apoptotic cell death emphasize an important role of the alternative NF-κB pathway in H. pylori infection.
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17
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Rusu I, Mennillo E, Bain JL, Li Z, Sun X, Ly KM, Rosli YY, Naser M, Wang Z, Advincula R, Achacoso P, Shao L, Razani B, Klein OD, Marson A, Turnbaugh JA, Turnbaugh PJ, Malynn BA, Ma A, Kattah MG. Microbial signals, MyD88, and lymphotoxin drive TNF-independent intestinal epithelial tissue damage. J Clin Invest 2022; 132:154993. [PMID: 35077396 PMCID: PMC8884902 DOI: 10.1172/jci154993] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 01/19/2022] [Indexed: 11/18/2022] Open
Abstract
Anti-TNF antibodies are effective for treating patients with inflammatory bowel disease (IBD), but many patients fail to respond to anti-TNF therapy, highlighting the importance of TNF-independent disease. We previously demonstrated that acute deletion of 2 IBD susceptibility genes, A20 (Tnfaip3) and Abin-1 (Tnip1), in intestinal epithelial cells (IECs) sensitized mice to both TNF-dependent and TNF-independent death. Here we show that TNF-independent IEC death after A20 and Abin-1 deletion was rescued by germ-free derivation or deletion of MyD88, while deletion of Trif provided only partial protection. Combined deletion of Ripk3 and Casp8, which inhibits both apoptotic and necroptotic death, completely protected against death after acute deletion of A20 and Abin-1 in IECs. A20- and Abin-1–deficient IECs were sensitized to TNF-independent, TNFR1-mediated death in response to lymphotoxin α (LTα) homotrimers. Blockade of LTα in vivo reduced weight loss and improved survival when combined with partial deletion of MyD88. Biopsies of inflamed colon mucosa from patients with IBD exhibited increased LTA and IL1B expression, including a subset of patients with active colitis on anti-TNF therapy. These data show that microbial signals, MyD88, and LTα all contribute to TNF-independent intestinal injury.
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Affiliation(s)
- Iulia Rusu
- Department of Medicine, UCSF, San Francisco, California, USA
| | - Elvira Mennillo
- Department of Medicine, UCSF, San Francisco, California, USA
| | - Jared L. Bain
- Department of Medicine, UCSF, San Francisco, California, USA
| | - Zhongmei Li
- Department of Medicine, UCSF, San Francisco, California, USA
- Gladstone Institutes, San Francisco, California, USA
| | - Xiaofei Sun
- Department of Medicine, UCSF, San Francisco, California, USA
| | | | - Yenny Y. Rosli
- Department of Medicine, UCSF, San Francisco, California, USA
| | - Mohammad Naser
- Biological Imaging Development CoLab, UCSF, San Francisco, California, USA
| | - Zunqiu Wang
- Department of Medicine, UCSF, San Francisco, California, USA
| | | | - Philip Achacoso
- Department of Medicine, UCSF, San Francisco, California, USA
| | - Ling Shao
- Department of Medicine, University of Southern California, Los Angeles, California, USA
| | | | - Ophir D. Klein
- Departments of Orofacial Sciences and Pediatrics, Program in Craniofacial Biology, and
| | - Alexander Marson
- Department of Medicine, UCSF, San Francisco, California, USA
- Gladstone Institutes, San Francisco, California, USA
- Department of Microbiology and Immunology and
- Institute for Human Genetics, UCSF, San Francisco, California, USA
- Innovative Genomics Institute, University of California, Berkeley, California, USA
- Parker Institute for Cancer Immunotherapy, San Francisco, California, USA
- Chan Zuckerberg Biohub, San Francisco, California, USA
| | | | | | | | - Averil Ma
- Department of Medicine, UCSF, San Francisco, California, USA
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18
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Qian G, Zhu L, Li G, Liu Y, Zhang Z, Pan J, Lv H. An Integrated View of Deubiquitinating Enzymes Involved in Type I Interferon Signaling, Host Defense and Antiviral Activities. Front Immunol 2021; 12:742542. [PMID: 34707613 PMCID: PMC8542838 DOI: 10.3389/fimmu.2021.742542] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 09/16/2021] [Indexed: 12/24/2022] Open
Abstract
Viral infectious diseases pose a great challenge to human health around the world. Type I interferons (IFN-Is) function as the first line of host defense and thus play critical roles during virus infection by mediating the transcriptional induction of hundreds of genes. Nevertheless, overactive cytokine immune responses also cause autoimmune diseases, and thus, tight regulation of the innate immune response is needed to achieve viral clearance without causing excessive immune responses. Emerging studies have recently uncovered that the ubiquitin system, particularly deubiquitinating enzymes (DUBs), plays a critical role in regulating innate immune responses. In this review, we highlight recent advances on the diverse mechanisms of human DUBs implicated in IFN-I signaling. These DUBs function dynamically to calibrate host defenses against various virus infections by targeting hub proteins in the IFN-I signaling transduction pathway. We also present a future perspective on the roles of DUB-substrate interaction networks in innate antiviral activities, discuss the promises and challenges of DUB-based drug development, and identify the open questions that remain to be clarified. Our review provides a comprehensive description of DUBs, particularly their differential mechanisms that have evolved in the host to regulate IFN-I-signaling-mediated antiviral responses.
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Affiliation(s)
- Guanghui Qian
- Institute of Pediatric Research, Children's Hospital of Soochow University, Suzhou, China
| | - Liyan Zhu
- Department of Experimental Center, Medical College of Soochow University, Suzhou, China
| | - Gen Li
- Institute of Pediatric Research, Children's Hospital of Soochow University, Suzhou, China
| | - Ying Liu
- Institute of Pediatric Research, Children's Hospital of Soochow University, Suzhou, China
| | - Zimu Zhang
- Institute of Pediatric Research, Children's Hospital of Soochow University, Suzhou, China
| | - Jian Pan
- Institute of Pediatric Research, Children's Hospital of Soochow University, Suzhou, China
| | - Haitao Lv
- Institute of Pediatric Research, Children's Hospital of Soochow University, Suzhou, China
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19
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Fuseya Y, Iwai K. Biochemistry, Pathophysiology, and Regulation of Linear Ubiquitination: Intricate Regulation by Coordinated Functions of the Associated Ligase and Deubiquitinase. Cells 2021; 10:cells10102706. [PMID: 34685685 PMCID: PMC8534859 DOI: 10.3390/cells10102706] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/04/2021] [Accepted: 10/07/2021] [Indexed: 12/14/2022] Open
Abstract
The ubiquitin system modulates protein functions by decorating target proteins with ubiquitin chains in most cases. Several types of ubiquitin chains exist, and chain type determines the mode of regulation of conjugated proteins. LUBAC is a ubiquitin ligase complex that specifically generates N-terminally Met1-linked linear ubiquitin chains. Although linear ubiquitin chains are much less abundant than other types of ubiquitin chains, they play pivotal roles in cell survival, proliferation, the immune response, and elimination of bacteria by selective autophagy. Because linear ubiquitin chains regulate inflammatory responses by controlling the proinflammatory transcription factor NF-κB and programmed cell death (including apoptosis and necroptosis), abnormal generation of linear chains can result in pathogenesis. LUBAC consists of HOIP, HOIL-1L, and SHARPIN; HOIP is the catalytic center for linear ubiquitination. LUBAC is unique in that it contains two different ubiquitin ligases, HOIP and HOIL-1L, in the same ligase complex. Furthermore, LUBAC constitutively interacts with the deubiquitinating enzymes (DUBs) OTULIN and CYLD, which cleave linear ubiquitin chains generated by LUBAC. In this review, we summarize the current status of linear ubiquitination research, and we discuss the intricate regulation of LUBAC-mediated linear ubiquitination by coordinate function of the HOIP and HOIL-1L ligases and OTULIN. Furthermore, we discuss therapeutic approaches to targeting LUBAC-mediated linear ubiquitin chains.
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Heida A, Gruben N, Catrysse L, Koehorst M, Koster M, Kloosterhuis NJ, Gerding A, Havinga R, Bloks VW, Bongiovanni L, Wolters JC, van Dijk T, van Loo G, de Bruin A, Kuipers F, Koonen DPY, van de Sluis B. The hepatocyte IKK:NF-κB axis promotes liver steatosis by stimulating de novo lipogenesis and cholesterol synthesis. Mol Metab 2021; 54:101349. [PMID: 34626855 PMCID: PMC8581577 DOI: 10.1016/j.molmet.2021.101349] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 09/20/2021] [Accepted: 09/30/2021] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVE Obesity-related chronic inflammation plays an important role in the development of Metabolic Associated Fatty Liver Disease (MAFLD). Although the contribution of the pro-inflammatory NF-κB signaling pathway to the progression from simple steatosis to non-alcoholic steatohepatitis (NASH) is well-established, its role as an initiator of hepatic steatosis and the underlying mechanism remains unclear. Here, we investigated the hypothesis that the hepatocytic NF-κB signaling pathway acts as a metabolic regulator, thereby promoting hepatic steatosis development. METHODS A murine model expressing a constitutively active form of IKKβ in hepatocytes (Hep-IKKβca) was used to activate hepatocyte NF-κB. In addition, IKKβca was also expressed in hepatocyte A20-deficient mice (IKKβca;A20LKO). A20 is an NF-κB-target gene that inhibits the activation of the NF-κB signaling pathway upstream of IKKβ. These mouse models were fed a sucrose-rich diet for 8 weeks. Hepatic lipid levels were measured and using [1-13C]-acetate de novo lipogenesis and cholesterol synthesis rate were determined. Gene expression analyses and immunoblotting were used to study the lipogenesis and cholesterol synthesis pathways. RESULTS Hepatocytic NF-κB activation by expressing IKKβca in hepatocytes resulted in hepatic steatosis without inflammation. Ablation of hepatocyte A20 in Hep-IKKβca mice (IKKβca;A20LKO mice) exacerbated hepatic steatosis, characterized by macrovesicular accumulation of triglycerides and cholesterol, and increased plasma cholesterol levels. Both De novo lipogenesis (DNL) and cholesterol synthesis were found elevated in IKKβca;A20LKO mice. Phosphorylation of AMP-activated kinase (AMPK) - a suppressor in lipogenesis and cholesterol synthesis - was decreased in IKKβca;A20LKO mice. This was paralleled by elevated protein levels of hydroxymethylglutaryl-CoA synthase 1 (HMGCS1) and reduced phosphorylation of HMG-CoA reductase (HMGCR) both key enzymes in the cholesterol synthesis pathway. Whereas inflammation was not observed in young IKKβca;A20LKO mice sustained hepatic NF-κB activation resulted in liver inflammation, together with elevated hepatic and plasma cholesterol levels in middle-aged mice. CONCLUSIONS The hepatocytic IKK:NF-κB axis is a metabolic regulator by controlling DNL and cholesterol synthesis, independent of its central role in inflammation. The IKK:NF-κB axis controls the phosphorylation levels of AMPK and HMGCR and the protein levels of HMGCS1. Chronic IKK-mediated NF-κB activation may contribute to the initiation of hepatic steatosis and cardiovascular disease risk in MAFLD patients.
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Affiliation(s)
- Andries Heida
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Nanda Gruben
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Leen Catrysse
- VIB Inflammation Research Center, Ghent University, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Martijn Koehorst
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Mirjam Koster
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Niels J Kloosterhuis
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Albert Gerding
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Rick Havinga
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Vincent W Bloks
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Laura Bongiovanni
- Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, the Netherlands; Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - Justina C Wolters
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Theo van Dijk
- Departments of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Geert van Loo
- VIB Inflammation Research Center, Ghent University, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Alain de Bruin
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands; Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, the Netherlands
| | - Folkert Kuipers
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands; Departments of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Debby P Y Koonen
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
| | - Bart van de Sluis
- Departments of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
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Zhang H, Zhao X, Guo Y, Chen R, He J, Li L, Qiang Z, Yang Q, Liu X, Huang C, Lu R, Fang J, Cao Y, Huang J, Wang Y, Huang J, Chen GQ, Cheng J, Yu J. Hypoxia regulates overall mRNA homeostasis by inducing Met 1-linked linear ubiquitination of AGO2 in cancer cells. Nat Commun 2021; 12:5416. [PMID: 34518544 PMCID: PMC8438024 DOI: 10.1038/s41467-021-25739-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 08/26/2021] [Indexed: 11/30/2022] Open
Abstract
Hypoxia is the most prominent feature in human solid tumors and induces activation of hypoxia-inducible factors and their downstream genes to promote cancer progression. However, whether and how hypoxia regulates overall mRNA homeostasis is unclear. Here we show that hypoxia inhibits global-mRNA decay in cancer cells. Mechanistically, hypoxia induces the interaction of AGO2 with LUBAC, the linear ubiquitin chain assembly complex, which co-localizes with miRNA-induced silencing complex and in turn catalyzes AGO2 occurring Met1-linked linear ubiquitination (M1-Ubi). A series of biochemical experiments reveal that M1-Ubi of AGO2 restrains miRNA-mediated gene silencing. Moreover, combination analyses of the AGO2-associated mRNA transcriptome by RIP-Seq and the mRNA transcriptome by RNA-Seq confirm that AGO2 M1-Ubi interferes miRNA-targeted mRNA recruiting to AGO2, and thereby facilitates accumulation of global mRNAs. By this mechanism, short-term hypoxia may protect overall mRNAs and enhances stress tolerance, whereas long-term hypoxia in tumor cells results in seriously changing the entire gene expression profile to drive cell malignant evolution. Met1-linked linear ubiquitination (M1-Ubi) is catalyzed by linear ubiquitin chain assembly complex (LUBAC). Here the authors show that Ago2 protein is M1-Ubi modified by LUBAC complex under hypoxia condition leading to less association of miRNA target mRNAs to Ago2 protein and de-repression of miRNA targets.
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Affiliation(s)
- Hailong Zhang
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Xian Zhao
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yanmin Guo
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Ran Chen
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Jianfeng He
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Lian Li
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Zhe Qiang
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Qianqian Yang
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Xiaojia Liu
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Caihu Huang
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Runhui Lu
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Jiayu Fang
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yingting Cao
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Jiayi Huang
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yanli Wang
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Jian Huang
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Guo-Qiang Chen
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China. .,Department of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Jinke Cheng
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Jianxiu Yu
- State Key Laboratory of Oncogenes and Related Genes, Department of Biochemistry and Molecular Cell Biology & Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China. .,Department of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
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Inhibitory feedback control of NF-κB signalling in health and disease. Biochem J 2021; 478:2619-2664. [PMID: 34269817 PMCID: PMC8286839 DOI: 10.1042/bcj20210139] [Citation(s) in RCA: 71] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 06/14/2021] [Accepted: 06/16/2021] [Indexed: 12/14/2022]
Abstract
Cells must adapt to changes in their environment to maintain cell, tissue and organismal integrity in the face of mechanical, chemical or microbiological stress. Nuclear factor-κB (NF-κB) is one of the most important transcription factors that controls inducible gene expression as cells attempt to restore homeostasis. It plays critical roles in the immune system, from acute inflammation to the development of secondary lymphoid organs, and also has roles in cell survival, proliferation and differentiation. Given its role in such critical processes, NF-κB signalling must be subject to strict spatiotemporal control to ensure measured and context-specific cellular responses. Indeed, deregulation of NF-κB signalling can result in debilitating and even lethal inflammation and also underpins some forms of cancer. In this review, we describe the homeostatic feedback mechanisms that limit and ‘re-set’ inducible activation of NF-κB. We first describe the key components of the signalling pathways leading to activation of NF-κB, including the prominent role of protein phosphorylation and protein ubiquitylation, before briefly introducing the key features of feedback control mechanisms. We then describe the array of negative feedback loops targeting different components of the NF-κB signalling cascade including controls at the receptor level, post-receptor signalosome complexes, direct regulation of the critical ‘inhibitor of κB kinases’ (IKKs) and inhibitory feedforward regulation of NF-κB-dependent transcriptional responses. We also review post-transcriptional feedback controls affecting RNA stability and translation. Finally, we describe the deregulation of these feedback controls in human disease and consider how feedback may be a challenge to the efficacy of inhibitors.
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23
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Ankylosing spondylitis: an autoimmune or autoinflammatory disease? Nat Rev Rheumatol 2021; 17:387-404. [PMID: 34113018 DOI: 10.1038/s41584-021-00625-y] [Citation(s) in RCA: 119] [Impact Index Per Article: 39.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/23/2021] [Indexed: 12/20/2022]
Abstract
Ankylosing spondylitis (AS) is a chronic inflammatory disorder of unknown aetiology. Unlike other systemic autoimmune diseases, in AS, the innate immune system has a dominant role characterized by aberrant activity of innate and innate-like immune cells, including γδ T cells, group 3 innate lymphoid cells, neutrophils, mucosal-associated invariant T cells and mast cells, at sites predisposed to the disease. The intestine is involved in disease manifestations, as it is at the forefront of the interaction between the mucosal-associated immune cells and the intestinal microbiota. Similarly, biomechanical factors, such as entheseal micro-trauma, might also be involved in the pathogenesis of the articular manifestation of AS, and sentinel immune cells located in the entheses could provide links between local damage, genetic predisposition and the development of chronic inflammation. Although these elements might support the autoinflammatory nature of AS, studies demonstrating the presence of autoantibodies (such as anti-CD74, anti-sclerostin and anti-noggin antibodies) and evidence of activation and clonal expansion of T cell populations support an autoimmune component to the disease. This Review presents the evidence for autoinflammation and the evidence for autoimmunity in AS and, by discussing the pathophysiological factors associated with each, aims to reconcile the two hypotheses.
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24
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Shi Y, Wang X, Wang J, Wang X, Zhou H, Zhang L. The dual roles of A20 in cancer. Cancer Lett 2021; 511:26-35. [PMID: 33933552 DOI: 10.1016/j.canlet.2021.04.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 04/13/2021] [Accepted: 04/25/2021] [Indexed: 12/11/2022]
Abstract
A20 is a prototypical anti-inflammatory molecule that is linked to multiple human diseases, including cancers. The role of A20 as a tumor suppressor was first discovered in B cell lymphomas. Subsequent studies revealed the dual roles of A20 in solid cancers. This review focuses on the roles of A20 in different cancer types to demonstrate that the effects of A20 are cancer type-dependent. A20 plays antitumor roles in colorectal carcinomas and hepatocellular carcinomas, whereas A20 acts as an oncogene in breast cancers, gastric cancers and melanomas. Moreover, the roles of A20 in the setting of glioma therapy are context-dependent. The action mechanisms of A20 in different types of cancer are summarized. Additionally, the role of A20 in antitumor immunity is discussed. Furthermore, some open questions in this rapidly advancing field are proposed. Exploration of the actions and molecular mechanisms of A20 in cancer paves the way for the application of A20-targeting approaches in future cancer therapy.
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Affiliation(s)
- Yongyu Shi
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
| | - Xinyu Wang
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Jianing Wang
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Xiaoyan Wang
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Huaiyu Zhou
- Department of Pathogen Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, China
| | - Lining Zhang
- Department of Immunology and Shandong Key Laboratory of Infection and Immunity, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
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25
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Meng Y, Sandow JJ, Czabotar PE, Murphy JM. The regulation of necroptosis by post-translational modifications. Cell Death Differ 2021; 28:861-883. [PMID: 33462412 PMCID: PMC7937688 DOI: 10.1038/s41418-020-00722-7] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 12/14/2020] [Accepted: 12/18/2020] [Indexed: 01/30/2023] Open
Abstract
Necroptosis is a caspase-independent, lytic form of programmed cell death whose errant activation has been widely implicated in many pathologies. The pathway relies on the assembly of the apical protein kinases, RIPK1 and RIPK3, into a high molecular weight cytoplasmic complex, termed the necrosome, downstream of death receptor or pathogen detector ligation. The necrosome serves as a platform for RIPK3-mediated phosphorylation of the terminal effector, the MLKL pseudokinase, which induces its oligomerization, translocation to, and perturbation of, the plasma membrane to cause cell death. Over the past 10 years, knowledge of the post-translational modifications that govern RIPK1, RIPK3 and MLKL conformation, activity, interactions, stability and localization has rapidly expanded. Here, we review current knowledge of the functions of phosphorylation, ubiquitylation, GlcNAcylation, proteolytic cleavage, and disulfide bonding in regulating necroptotic signaling. Post-translational modifications serve a broad array of functions in modulating RIPK1 engagement in, or exclusion from, cell death signaling, whereas the bulk of identified RIPK3 and MLKL modifications promote their necroptotic functions. An enhanced understanding of the modifying enzymes that tune RIPK1, RIPK3, and MLKL necroptotic functions will prove valuable in efforts to therapeutically modulate necroptosis.
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Affiliation(s)
- Yanxiang Meng
- grid.1042.7Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, VIC 3052 Australia ,grid.1008.90000 0001 2179 088XDepartment of Medical Biology, University of Melbourne, Parkville, VIC 3052 Australia
| | - Jarrod J. Sandow
- grid.1042.7Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, VIC 3052 Australia ,grid.1008.90000 0001 2179 088XDepartment of Medical Biology, University of Melbourne, Parkville, VIC 3052 Australia
| | - Peter E. Czabotar
- grid.1042.7Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, VIC 3052 Australia ,grid.1008.90000 0001 2179 088XDepartment of Medical Biology, University of Melbourne, Parkville, VIC 3052 Australia
| | - James M. Murphy
- grid.1042.7Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, VIC 3052 Australia ,grid.1008.90000 0001 2179 088XDepartment of Medical Biology, University of Melbourne, Parkville, VIC 3052 Australia
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26
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Jahan AS, Elbæk CR, Damgaard RB. Met1-linked ubiquitin signalling in health and disease: inflammation, immunity, cancer, and beyond. Cell Death Differ 2021; 28:473-492. [PMID: 33441937 DOI: 10.1038/s41418-020-00676-w] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/05/2020] [Accepted: 11/05/2020] [Indexed: 12/22/2022] Open
Abstract
Post-translational modification of proteins with ubiquitin (ubiquitination) provides a rapid and versatile mechanism for regulating cellular signalling systems. Met1-linked (or 'linear') ubiquitin chains have emerged as a key regulatory signal that controls cell death, immune signalling, and other vital cellular functions. The molecular machinery that assembles, senses, and disassembles Met1-linked ubiquitin chains is highly specific. In recent years, the thorough biochemical and genetic characterisation of the enzymes and proteins of the Met1-linked ubiquitin signalling machinery has paved the way for substantial advances in our understanding of how Met1-linked ubiquitin chains control cell signalling and biology. Here, we review current knowledge and recent insights into the role of Met1-linked ubiquitin chains in cell signalling with an emphasis on their role in disease biology. Met1-linked ubiquitin has potent regulatory functions in immune signalling, NF-κB transcription factor activation, and cell death. Importantly, mounting evidence shows that dysregulation of Met1-linked ubiquitin signalling is associated with multiple human diseases, including immune disorders, cancer, and neurodegeneration. We discuss the latest evidence on the cellular function of Met1-linked ubiquitin in the context of its associated diseases and highlight new emerging roles of Met1-linked ubiquitin chains in cell signalling, including regulation of protein quality control and metabolism.
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Affiliation(s)
- Akhee Sabiha Jahan
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, 2800 Kgs, Lyngby, Denmark
| | - Camilla Reiter Elbæk
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, 2800 Kgs, Lyngby, Denmark
| | - Rune Busk Damgaard
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, 2800 Kgs, Lyngby, Denmark.
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27
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Cockram PE, Kist M, Prakash S, Chen SH, Wertz IE, Vucic D. Ubiquitination in the regulation of inflammatory cell death and cancer. Cell Death Differ 2021; 28:591-605. [PMID: 33432113 PMCID: PMC7798376 DOI: 10.1038/s41418-020-00708-5] [Citation(s) in RCA: 155] [Impact Index Per Article: 51.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 12/12/2022] Open
Abstract
The ubiquitin system is complex, multifaceted, and is crucial for the modulation of a vast number of cellular processes. Ubiquitination is tightly regulated at different levels by a range of enzymes including E1s, E2s, and E3s, and an array of DUBs. The UPS directs protein degradation through the proteasome, and regulates a wide array of cellular processes including transcription and epigenetic factors as well as key oncoproteins. Ubiquitination is key to the dynamic regulation of programmed cell death. Notably, the TNF signaling pathway is controlled by competing ubiquitin conjugation and deubiquitination, which governs both proteasomal degradation and signaling complex formation. In the inflammatory response, ubiquitination is capable of both activating and dampening inflammasome activation through the control of either protein stability, complex formation, or, in some cases, directly affecting receptor activity. In this review, we discuss the enzymes and targets in the ubiquitin system that regulate fundamental cellular processes regulating cell death, and inflammation, as well as disease consequences resulting from their dysregulation. Finally, we highlight several pre-clinical and clinical compounds that regulate ubiquitin system enzymes, with the aim of restoring homeostasis and ameliorating diseases.
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Affiliation(s)
- Peter E Cockram
- Departments of Discovery Oncology, Genentech, 1 DNA Way, South San Francisco, CA, 94080, USA.,Departments of Discovery Chemistry, Genentech, 1 DNA Way, South San Francisco, CA, 94080, USA
| | - Matthias Kist
- Departments of Early Discovery Biochemistry, Genentech, 1 DNA Way, South San Francisco, CA, 94080, USA
| | - Sumit Prakash
- Departments of Discovery Oncology, Genentech, 1 DNA Way, South San Francisco, CA, 94080, USA
| | - Si-Han Chen
- Departments of Discovery Oncology, Genentech, 1 DNA Way, South San Francisco, CA, 94080, USA
| | - Ingrid E Wertz
- Departments of Discovery Oncology, Genentech, 1 DNA Way, South San Francisco, CA, 94080, USA. .,Departments of Early Discovery Biochemistry, Genentech, 1 DNA Way, South San Francisco, CA, 94080, USA.
| | - Domagoj Vucic
- Departments of Early Discovery Biochemistry, Genentech, 1 DNA Way, South San Francisco, CA, 94080, USA.
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28
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Krishnan D, Menon RN, Gopala S. SHARPIN: Role in Finding NEMO and in Amyloid-Beta Clearance and Degradation (ABCD) Pathway in Alzheimer's Disease? Cell Mol Neurobiol 2021; 42:1267-1281. [PMID: 33400084 DOI: 10.1007/s10571-020-01023-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 11/28/2020] [Indexed: 12/11/2022]
Abstract
SHANK- associated RH domain-interacting protein (SHARPIN) is a multifunctional protein associated with numerous physiological functions and many diseases. The primary role of the protein as a LUBAC-dependent component in regulating the activation of the transcription factor NF-κB accounts to its role in inflammation and antiapoptosis. Hence, an alteration of SHARPIN expression or genetic mutations or polymorphisms leads to the alteration of the above-mentioned primary physiological functions contributing to inflammation-associated diseases and cancer, respectively. However, there are complications of targeting SHARPIN as a therapeutic approach, which arises from the wide-range of LUBAC-independent functions and yet unknown roles of SHARPIN including neuronal functions. The identification of SHARPIN as a postsynaptic protein and the emerging studies indicating its role in several neurodegenerative diseases including Alzheimer's disease suggests a strong role of SHARPIN in neuronal functioning. This review summarizes the functional roles of SHARPIN in normal physiology and disease pathogenesis and strongly suggests a need for concentrating more studies on identifying the unknown neuronal functions of SHARPIN and hence its role in neurodegenerative diseases.
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Affiliation(s)
- Dhanya Krishnan
- Department of Biochemistry, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, 695011, Kerala, India
| | - Ramsekhar N Menon
- Department of Neurology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, 695011, Kerala, India
| | - Srinivas Gopala
- Department of Biochemistry, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, 695011, Kerala, India.
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IWAI K. LUBAC-mediated linear ubiquitination: a crucial regulator of immune signaling. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2021; 97:120-133. [PMID: 33692228 PMCID: PMC8019854 DOI: 10.2183/pjab.97.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Ubiquitination is a reversible post-translational modification in which ubiquitin chains are conjugated to target proteins to modulate protein function. The type of ubiquitin chain determines the mode of protein regulation. It has been shown that ubiquitin chains are formed via one of seven Lys residues in ubiquitin, and several types of ubiquitin chains are found in cells. We identified a new type of linear ubiquitin chain linked through the N-terminal Met of ubiquitin and assembled by the linear ubiquitin chain assembly complex (LUBAC), which is specific for linear chains. The discovery of linear ubiquitin chains and LUBAC is considered as a paradigm shift in ubiquitin research because linear ubiquitination is exclusive to animals, despite the existence of ubiquitination throughout eukaryotic kingdoms. Linear ubiquitination plays a critical role in immune signaling and cell death regulation. Dysregulation of LUBAC-mediated linear ubiquitination underlies various human diseases, including autoinflammation, autoimmunity, infection, and malignant tumors. This review summarizes the current status of linear ubiquitination research.
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Affiliation(s)
- Kazuhiro IWAI
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Correspondence should be addressed: K. Iwai, Department of Molecular and Cellular Physiology, Graduate School of Medicine, Kyoto University, Yoshida-konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan (e-mail: )
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Razani B, Malynn BA, Ma A. Preserving immune homeostasis with A20. Adv Immunol 2020; 148:1-48. [PMID: 33190732 DOI: 10.1016/bs.ai.2020.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
A20/TNFAIP3 is a TNF induced gene that plays a profound role in preserving cellular and organismal homeostasis (Lee, et al., 2000; Opipari etal., 1990). This protein has been linked to multiple human diseases via genetic, epigenetic, and an emerging series of patients with mono-allelic coding mutations. Diverse cellular functions of this pleiotropically expressed protein include immune-suppressive, anti-inflammatory, and cell protective functions. The A20 protein regulates ubiquitin dependent cell signals; however, the biochemical mechanisms by which it performs these functions is surprisingly complex. Deciphering these cellular and biochemical facets of A20 dependent biology should greatly improve our understanding of murine and human disease pathophysiology as well as unveil new mechanisms of cell and tissue biology.
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Affiliation(s)
- Bahram Razani
- Department of Dermatology, University of California, San Francisco, CA, United States
| | - Barbara A Malynn
- Department of Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Averil Ma
- Department of Medicine, University of California, San Francisco, San Francisco, CA, United States.
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Essential role of the linear ubiquitin chain assembly complex and TAK1 kinase in A20 mutant Hodgkin lymphoma. Proc Natl Acad Sci U S A 2020; 117:28980-28991. [PMID: 33139544 DOI: 10.1073/pnas.2014470117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
More than 70% of Epstein-Barr virus (EBV)-negative Hodgkin lymphoma (HL) cases display inactivation of TNFAIP3 (A20), a ubiquitin-editing protein that regulates nonproteolytic protein ubiquitination, indicating the significance of protein ubiquitination in HL pathogenesis. However, the precise mechanistic roles of A20 and the ubiquitination system remain largely unknown in this disease. Here, we performed high-throughput CRISPR screening using a ubiquitin regulator-focused single-guide RNA library in HL lines carrying either wild-type or mutant A20. Our CRISPR screening highlights the essential oncogenic role of the linear ubiquitin chain assembly complex (LUBAC) in HL lines, which overlaps with A20 inactivation status. Mechanistically, LUBAC promotes IKK/NF-κB activity and NEMO linear ubiquitination in A20 mutant HL cells, which is required for prosurvival genes and immunosuppressive molecule expression. As a tumor suppressor, A20 directly inhibits IKK activation and HL cell survival via its C-terminal linear-ubiquitin binding ZF7. Clinically, LUBAC activity is consistently elevated in most primary HL cases, and this is correlated with high NF-κB activity and low A20 expression. To further understand the complete mechanism of NF-κB activation in A20 mutant HL, we performed a specifically designed CD83-based NF-κB CRISPR screen which led us to identify TAK1 kinase as a major mediator for NF-κB activation in cells dependent on LUBAC, where the LUBAC-A20 axis regulates TAK1 and IKK complex formation. Finally, TAK1 inhibitor Takinib shows promising activity against HL in vitro and in a xenograft mouse model. Altogether, these findings provide strong support that targeting LUBAC or TAK1 could be attractive therapeutic strategies in A20 mutant HL.
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Morgan EL, Chen Z, Van Waes C. Regulation of NFκB Signalling by Ubiquitination: A Potential Therapeutic Target in Head and Neck Squamous Cell Carcinoma? Cancers (Basel) 2020; 12:E2877. [PMID: 33036368 PMCID: PMC7601648 DOI: 10.3390/cancers12102877] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 09/22/2020] [Accepted: 09/29/2020] [Indexed: 02/08/2023] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is the sixth most common cancer worldwide, with over 600,000 cases per year. The primary causes for HNSCC include smoking and alcohol consumption, with an increasing number of cases attributed to infection with Human Papillomavirus (HPV). The treatment options for HNSCC currently include surgery, radiotherapy, and/or platinum-based chemotherapeutics. Cetuximab (targeting EGFR) and Pembrolizumab (targeting PD-1) have been approved for advanced stage, recurrent, and/or metastatic HNSCC. Despite these advances, whilst HPV+ HNSCC has a 3-year overall survival (OS) rate of around 80%, the 3-year OS for HPV- HNSCC is still around 55%. Aberrant signal activation of transcription factor NFκB plays an important role in the pathogenesis and therapeutic resistance of HNSCC. As an important mediator of inflammatory signalling and the immune response to pathogens, the NFκB pathway is tightly regulated to prevent chronic inflammation, a key driver of tumorigenesis. Here, we discuss how NFκB signalling is regulated by the ubiquitin pathway and how this pathway is deregulated in HNSCC. Finally, we discuss the current strategies available to target the ubiquitin pathway and how this may offer a potential therapeutic benefit in HNSCC.
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Affiliation(s)
- Ethan L. Morgan
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute of Deafness and Other Communication Disorders, NIH, Bethesda, MD 20892, USA;
| | - Zhong Chen
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute of Deafness and Other Communication Disorders, NIH, Bethesda, MD 20892, USA;
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Wu Y, He X, Huang N, Yu J, Shao B. A20: a master regulator of arthritis. Arthritis Res Ther 2020; 22:220. [PMID: 32958016 PMCID: PMC7504854 DOI: 10.1186/s13075-020-02281-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 07/28/2020] [Indexed: 02/07/2023] Open
Abstract
A20, also known as TNF-α-induced protein 3 (TNFAIP3), is an anti-inflammatory protein that plays an important part in both immune responses and cell death. Impaired A20 function is associated with several human inflammatory and autoimmune diseases. Although the role of A20 in mediating inflammation has been frequently discussed, its intrinsic link to arthritis awaits further explanation. Here, we review new findings that further demonstrate the molecular mechanisms through which A20 regulates inflammatory arthritis, and we discuss the regulation of A20 by many factors. We conclude by reviewing the latest A20-associated mouse models that have been applied in related research because they reflect the characteristics of arthritis, the study of which will hopefully cast new light on anti-arthritis treatments.
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Affiliation(s)
- Yongyao Wu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xiaomin He
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Ning Huang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Jiayun Yu
- State Key Laboratory of Biotherapy anf Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Bin Shao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China. .,State Key Laboratory of Biotherapy anf Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China.
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Speir M, Lawlor KE. RIP-roaring inflammation: RIPK1 and RIPK3 driven NLRP3 inflammasome activation and autoinflammatory disease. Semin Cell Dev Biol 2020; 109:114-124. [PMID: 32771377 DOI: 10.1016/j.semcdb.2020.07.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 01/05/2023]
Abstract
Autoinflammatory syndromes comprise a spectrum of clinical disorders characterised by recurrent, inflammatory episodes, many of which result from the release of the pro-inflammatory cytokine, interleukin-1β (IL-1β). Inflammation and programmed cell death are tightly linked, and lytic forms of cell death, such as necroptosis and pyroptosis, are considered to be inflammatory due to the release of damage-associated molecular patterns (DAMPs). In contrast, apoptosis is traditionally regarded as immunologically silent. Recent studies, however, have uncovered a high degree of crosstalk between cell death and inflammatory signalling pathways, and effectively consolidated them into one interconnected network that converges on NLRP3 inflammasome-mediated activation of IL-1β. The receptor-interacting protein kinases (RIPK) 1 and 3 are central to this network, as highlighted by the fact that mutations in genes encoding repressors of RIPK1 and/or RIPK3 activity can lead to heightened inflammation, particularly via NLRP3 inflammasome activation. In this review, we give an overview of extrinsic cell death and inflammatory signalling pathways, and then highlight the growing number of autoinflammatory diseases that are associated with aberrant cell death and inflammasome activation.
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Affiliation(s)
- Mary Speir
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, Victoria, Australia; Department of Molecular and Translational Science, Monash University, Melbourne, Victoria, Australia.
| | - Kate E Lawlor
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, Victoria, Australia; Department of Molecular and Translational Science, Monash University, Melbourne, Victoria, Australia.
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Oikawa D, Sato Y, Ito H, Tokunaga F. Linear Ubiquitin Code: Its Writer, Erasers, Decoders, Inhibitors, and Implications in Disorders. Int J Mol Sci 2020; 21:ijms21093381. [PMID: 32403254 PMCID: PMC7246992 DOI: 10.3390/ijms21093381] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/01/2020] [Accepted: 05/06/2020] [Indexed: 12/12/2022] Open
Abstract
The linear ubiquitin chain assembly complex (LUBAC) is a ubiquitin ligase composed of the Heme-oxidized IRP2 ubiquitin ligase-1L (HOIL-1L), HOIL-1L-interacting protein (HOIP), and Shank-associated RH domain interactor (SHARPIN) subunits. LUBAC specifically generates the N-terminal Met1-linked linear ubiquitin chain and regulates acquired and innate immune responses, such as the canonical nuclear factor-κB (NF-κB) and interferon antiviral pathways. Deubiquitinating enzymes, OTULIN and CYLD, physiologically bind to HOIP and control its function by hydrolyzing the linear ubiquitin chain. Moreover, proteins containing linear ubiquitin-specific binding domains, such as NF-κB-essential modulator (NEMO), optineurin, A20-binding inhibitors of NF-κB (ABINs), and A20, modulate the functions of LUBAC, and the dysregulation of the LUBAC-mediated linear ubiquitination pathway induces cancer and inflammatory, autoimmune, and neurodegenerative diseases. Therefore, inhibitors of LUBAC would be valuable to facilitate investigations of the molecular and cellular bases for LUBAC-mediated linear ubiquitination and signal transduction, and for potential therapeutic purposes. We identified and characterized α,β-unsaturated carbonyl-containing chemicals, named HOIPINs (HOIP inhibitors), as LUBAC inhibitors. We summarize recent advances in elucidations of the pathophysiological functions of LUBAC-mediated linear ubiquitination and identifications of its regulators, toward the development of LUBAC inhibitors.
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Affiliation(s)
- Daisuke Oikawa
- Department of Pathobiochemistry, Graduate School of Medicine, Osaka City University, Osaka 545-8585, Japan;
| | - Yusuke Sato
- Center for Research on Green Sustainable Chemistry, Tottori University, Tottori 680-8552, Japan;
| | - Hidefumi Ito
- Department of Neurology, Faculty of Medicine, Wakayama Medical University, Wakayama 641-8510, Japan;
| | - Fuminori Tokunaga
- Department of Pathobiochemistry, Graduate School of Medicine, Osaka City University, Osaka 545-8585, Japan;
- Correspondence: ; Tel.: +81-6-6645-3720
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36
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Priem D, van Loo G, Bertrand MJM. A20 and Cell Death-driven Inflammation. Trends Immunol 2020; 41:421-435. [PMID: 32241683 DOI: 10.1016/j.it.2020.03.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 02/27/2020] [Accepted: 03/04/2020] [Indexed: 12/18/2022]
Abstract
A20 is a potent anti-inflammatory molecule, and mutations in TNFAIP3, the gene encoding A20, are associated with a wide panel of inflammatory pathologies, both in human and mouse. The anti-inflammatory properties of A20 are commonly attributed to its ability to suppress inflammatory NF-κB signaling by functioning as a ubiquitin-editing enzyme. However, A20 also protects cells from death, independently of NF-κB regulation, and recent work has demonstrated that cell death may drive some of the inflammatory conditions caused by A20 deficiency. Adding to the fact that the protective role of A20 does not primarily rely on its catalytic activities, these findings shed new light on A20 biology.
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Affiliation(s)
- Dario Priem
- Center for Inflammation Research, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Geert van Loo
- Center for Inflammation Research, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Mathieu J M Bertrand
- Center for Inflammation Research, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
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37
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Kim T, Bae SC, Kang C. Synergistic activation of NF-κB by TNFAIP3 (A20) reduction and UBE2L3 (UBCH7) augment that synergistically elevate lupus risk. Arthritis Res Ther 2020; 22:93. [PMID: 32334614 PMCID: PMC7183688 DOI: 10.1186/s13075-020-02181-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 04/02/2020] [Indexed: 02/03/2023] Open
Abstract
Background Systemic lupus erythematosus (SLE) is an autoimmune inflammatory rheumatic disease. SLE susceptibility is affected by multiple genetic elements, environmental factors, and their interactions. We aimed in this study to statistically and functionally characterize a gene-gene interaction (epistasis) recently documented to affect SLE risk. Methods Two single-nucleotide polymorphisms, rs2230926 in TNFAIP3 (A20) gene and rs131654 in UBE2L3 (UBCH7) gene, were genotyped in all 3525 Korean participants, and their SLE risk association and epistasis were statistically analyzed by calculating odds ratio (OR), 95% confidence interval (CI), and P values in genotype comparisons between 1318 SLE patients and 2207 healthy controls. Furthermore, their effects on gene functions were assessed by comparatively examining separate and combined effects of TNFAIP3 and UBE2L3 knockdowns on NF-κB transcription factor activity in human cells. Results SLE susceptibility is associated with TNFAIP3 rs2230926 (OR = 1.9, 95% CI 1.6–2.4, P = 8.6 × 10−11) and UBE2L3 rs131654 (OR = 1.2, 95% CI 1.1–1.4, P = 1.1 × 10−4) in a Korean population of this study. Their risk-associated alleles synergistically elevate SLE susceptibility in both multivariate logistic regression analysis (ORinteraction = 1.6, P = 0.0028) and genotype-stratified analysis (ORinteraction = 2.4), confirming the synergistic TNFAIP3-UBE2L3 interaction in SLE risk. Additionally, the SLE-susceptible alleles confer decreased TNFAIP3 expression (P = 1.1 × 10−6, n = 610) and increased UBE2L3 expression (P = 9.5 × 10−11, n = 475), respectively, in B cell analysis of the International HapMap Project individuals with adjustment for ethnicity. Furthermore, when compared with TNFAIP3 non-knockdown and UBE2L3 knockdown in human HeLa cells, TNFAIP3 knockdown and UBE2L3 non-knockdown synergistically increase three cytokines, CCL2, CXCL8 (IL8), and IL6, all regulated by NF-κB in the human TNFR signaling pathway. Conclusions A synergistic interaction between TNFAIP3 and UBE2L3 genes is observed in SLE risk, as being evident in comparison of genotype distributions between SLE patients and controls. Additionally, the synergistic gene-gene interaction is functionally validated, as TNFAIP3 reduction and UBE2L3 augment exert synergism in activation of NF-κB and subsequent induction of inflammatory cytokines. Accordingly, SLE inflammation and risk could be synergistically alleviated by TNFAIP3 upregulation and UBE2L3 downregulation.
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Affiliation(s)
- Taehyeung Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Sang-Cheol Bae
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, 222-1 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea.
| | - Changwon Kang
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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38
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Razani B, Whang MI, Kim FS, Nakamura MC, Sun X, Advincula R, Turnbaugh JA, Pendse M, Tanbun P, Achacoso P, Turnbaugh PJ, Malynn BA, Ma A. Non-catalytic ubiquitin binding by A20 prevents psoriatic arthritis-like disease and inflammation. Nat Immunol 2020; 21:422-433. [PMID: 32205880 PMCID: PMC7195210 DOI: 10.1038/s41590-020-0634-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 02/12/2020] [Indexed: 01/01/2023]
Abstract
A20 is an anti-inflammatory protein that is strongly linked to human disease. Here, we find that mice expressing three distinct targeted mutations of A20's zinc finger 7 (ZF7) ubiquitin-binding motif uniformly developed digit arthritis with features common to psoriatic arthritis, while mice expressing point mutations in A20's OTU or ZF4 motifs did not exhibit this phenotype. Arthritis in A20ZF7 mice required T cells and MyD88, was exquisitely sensitive to tumor necrosis factor and interleukin-17A, and persisted in germ-free conditions. A20ZF7 cells exhibited prolonged IκB kinase activity that drove exaggerated transcription of late-phase nuclear factor-κB response genes in vitro and in prediseased mouse paws in vivo. In addition, mice expressing double-mutant A20 proteins in A20's ZF4 and ZF7 motifs died perinatally with multi-organ inflammation. Therefore, A20's ZF4 and ZF7 motifs synergistically prevent inflammatory disease in a non-catalytic manner.
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Affiliation(s)
- Bahram Razani
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA.,Department of Dermatology, University of California, San Francisco, San Francisco, CA, USA
| | - Michael I Whang
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Francis S Kim
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA.,Department of Pediatrics, University of California, San Francisco, San Francisco, CA, USA
| | - Mary C Nakamura
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Xiaofei Sun
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Rommel Advincula
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Jessie A Turnbaugh
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA, USA
| | - Mihir Pendse
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Priscilia Tanbun
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Philip Achacoso
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Peter J Turnbaugh
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA, USA
| | - Barbara A Malynn
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA.
| | - Averil Ma
- Department of Medicine, University of California, San Francisco, San Francisco, CA, USA.
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Two distinct ubiquitin-binding motifs in A20 mediate its anti-inflammatory and cell-protective activities. Nat Immunol 2020; 21:381-387. [PMID: 32205881 DOI: 10.1038/s41590-020-0621-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 01/28/2020] [Indexed: 01/13/2023]
Abstract
Protein ubiquitination regulates protein stability and modulates the composition of signaling complexes. A20 is a negative regulator of inflammatory signaling, but the molecular mechanisms involved are ill understood. Here, we generated Tnfaip3 gene-targeted A20 mutant mice bearing inactivating mutations in the zinc finger 7 (ZnF7) and ZnF4 ubiquitin-binding domains, revealing that binding to polyubiquitin is essential for A20 to suppress inflammatory disease. We demonstrate that a functional ZnF7 domain was required for recruiting A20 to the tumor necrosis factor receptor 1 (TNFR1) signaling complex and to suppress inflammatory signaling and cell death. The combined inactivation of ZnF4 and ZnF7 phenocopied the postnatal lethality and severe multiorgan inflammation of A20-deficient mice. Conditional tissue-specific expression of mutant A20 further revealed the key role of ubiquitin-binding in myeloid and intestinal epithelial cells. Collectively, these results demonstrate that the anti-inflammatory and cytoprotective functions of A20 are largely dependent on its ubiquitin-binding properties.
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40
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Bader V, Winklhofer KF. Mitochondria at the interface between neurodegeneration and neuroinflammation. Semin Cell Dev Biol 2020; 99:163-171. [DOI: 10.1016/j.semcdb.2019.05.028] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 05/28/2019] [Accepted: 05/29/2019] [Indexed: 12/15/2022]
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41
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Martín-Vicente M, González-Sanz R, Cuesta I, Monzón S, Resino S, Martínez I. Downregulation of A20 Expression Increases the Immune Response and Apoptosis and Reduces Virus Production in Cells Infected by the Human Respiratory Syncytial Virus. Vaccines (Basel) 2020; 8:vaccines8010100. [PMID: 32102364 PMCID: PMC7157707 DOI: 10.3390/vaccines8010100] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/18/2020] [Accepted: 02/19/2020] [Indexed: 01/20/2023] Open
Abstract
Human respiratory syncytial virus (HRSV) causes severe lower respiratory tract infections in infants, the elderly, and immunocompromised adults. Regulation of the immune response against HRSV is crucial to limiting virus replication and immunopathology. The A20/TNFAIP3 protein is a negative regulator of nuclear factor kappa B (NF-κB) and interferon regulatory factors 3/7 (IRF3/7), which are key transcription factors involved in the inflammatory/antiviral response of epithelial cells to virus infection. Here, we investigated the impact of A20 downregulation or knockout on HRSV growth and the induction of the immune response in those cells. Cellular infections in which the expression of A20 was silenced by siRNAs or eliminated by gene knockout showed increased inflammatory/antiviral response and reduced virus production. Similar results were obtained when the expression of A20-interacting proteins, such as TAX1BP1 and ABIN1, was silenced. Additionally, downregulation of A20, TAX1BP1, and ABIN1 increased cell apoptosis in HRSV-infected cells. These results show that the downregulation of A20 expression might contribute in the control of HRSV infections by potentiating the early innate immune response and increasing apoptosis in infected cells.
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Affiliation(s)
- María Martín-Vicente
- Unidad de Infección Viral e Inmunidad, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, 28220 Madrid, Spain; (M.M.-V.); (R.G.-S.); (S.R.)
| | - Rubén González-Sanz
- Unidad de Infección Viral e Inmunidad, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, 28220 Madrid, Spain; (M.M.-V.); (R.G.-S.); (S.R.)
| | - Isabel Cuesta
- Unidad de Bioinformática, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, 28220 Madrid, Spain; (I.C.); (S.M.)
| | - Sara Monzón
- Unidad de Bioinformática, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, 28220 Madrid, Spain; (I.C.); (S.M.)
| | - Salvador Resino
- Unidad de Infección Viral e Inmunidad, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, 28220 Madrid, Spain; (M.M.-V.); (R.G.-S.); (S.R.)
| | - Isidoro Martínez
- Unidad de Infección Viral e Inmunidad, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, 28220 Madrid, Spain; (M.M.-V.); (R.G.-S.); (S.R.)
- Correspondence: ; Tel.: +34-91-8223272; Fax: +34-91-5097919
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42
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Feoktistova M, Makarov R, Brenji S, Schneider AT, Hooiveld GJ, Luedde T, Leverkus M, Yazdi AS, Panayotova-Dimitrova D. A20 Promotes Ripoptosome Formation and TNF-Induced Apoptosis via cIAPs Regulation and NIK Stabilization in Keratinocytes. Cells 2020; 9:E351. [PMID: 32028675 PMCID: PMC7072579 DOI: 10.3390/cells9020351] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 01/29/2020] [Accepted: 02/01/2020] [Indexed: 12/30/2022] Open
Abstract
The ubiquitin-editing protein A20 (TNFAIP3) is a known key player in the regulation of immune responses in many organs. Genome-wide associated studies (GWASs) have linked A20 with a number of inflammatory and autoimmune disorders, including psoriasis. Here, we identified a previously unrecognized role of A20 as a pro-apoptotic factor in TNF-induced cell death in keratinocytes. This function of A20 is mediated via the NF-κB-dependent alteration of cIAP1/2 expression. The changes in cIAP1/2 protein levels promote NIK stabilization and subsequent activation of noncanonical NF-κB signaling. Upregulation of TRAF1 expression triggered by the noncanonical NF-κB signaling further enhances the NIK stabilization in an autocrine manner. Finally, stabilized NIK promotes the formation of the ripoptosome and the execution of cell death. Thus, our data demonstrate that A20 controls the execution of TNF-induced cell death on multiple levels in keratinocytes. This signaling mechanism might have important implications for the development of new therapeutic strategies for the treatment of A20-associated skin diseases.
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Affiliation(s)
- Maria Feoktistova
- Department of Dermatology and Allergology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (M.F.); (R.M.); (S.B.); (A.S.Y.)
| | - Roman Makarov
- Department of Dermatology and Allergology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (M.F.); (R.M.); (S.B.); (A.S.Y.)
| | - Sihem Brenji
- Department of Dermatology and Allergology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (M.F.); (R.M.); (S.B.); (A.S.Y.)
| | - Anne T. Schneider
- Department of Medicine III, Department of Gastroenterology, Hepatology and Hepatobiliary Oncology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (A.T.S.); (T.L.)
| | - Guido J. Hooiveld
- Nutrition, Metabolism & Genomics Group, Division of Human Nutrition & Health, Wageningen University, 6700 AA Wageningen; The Netherlands;
| | - Tom Luedde
- Department of Medicine III, Department of Gastroenterology, Hepatology and Hepatobiliary Oncology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (A.T.S.); (T.L.)
| | - Martin Leverkus
- Department of Dermatology and Allergology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (M.F.); (R.M.); (S.B.); (A.S.Y.)
| | - Amir S. Yazdi
- Department of Dermatology and Allergology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (M.F.); (R.M.); (S.B.); (A.S.Y.)
| | - Diana Panayotova-Dimitrova
- Department of Dermatology and Allergology, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (M.F.); (R.M.); (S.B.); (A.S.Y.)
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Daems C, Sékulic M, Vulsteke V, van Loo G, D’Hooge R, Callaerts-Végh Z, Callaerts P. A20/ TNFAIP3 heterozygosity predisposes to behavioral symptoms in a mouse model for neuropsychiatric lupus. Brain Behav Immun Health 2020; 2:100018. [PMID: 38377433 PMCID: PMC8474646 DOI: 10.1016/j.bbih.2019.100018] [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: 10/08/2019] [Revised: 11/28/2019] [Accepted: 12/04/2019] [Indexed: 12/19/2022] Open
Abstract
Background Neuropsychiatric lupus (NPSLE) refers to the neurological and psychiatric manifestations that are commonly observed in patients with systemic lupus erythematosus (SLE). An important question regarding the pathogenesis of NPSLE is whether the symptoms are caused primarily by CNS-intrinsic mechanisms or develop as a consequence of systemic autoimmunity. Currently used spontaneous mouse models for SLE have already contributed significantly to unraveling how systemic immunity affects the CNS. However, they are less suited when interested in CNS primary mechanisms. In addition, none of these models are based on genes that are associated with SLE. In this study, we evaluate the influence of A20, a well-known susceptibility locus for SLE, on behavior and CNS-associated changes in inflammatory markers. Furthermore, given the importance of environmental triggers for disease onset and progression, the influence of an acute immunological challenge was evaluated. Methods Female and male A20 heterozygous mice (A20+/-) and wildtype littermates were tested in an extensive behavioral battery. This was done at the age of 10±2weeks and 24 ± 2 weeks to evaluate the impact of aging. To investigate the contribution of an acute immunological challenge, LPS was injected intracerebroventricularly at the age of 10±2weeks followed by behavioral analysis. Underlying molecular mechanisms were evaluated in gene expression assays on hippocampus and cortex. White blood cell count and blood-brain barrier permeability were analyzed to determine whether peripheral inflammation is a relevant factor. Results A20 heterozygosity predisposes to cognitive symptoms that were observed at the age of 10 ± 2 weeks and 24 ± 2 weeks. Young A20+/- males and females showed a subtle cognitive phenotype (10±2weeks) with distinct neuroinflammatory phenotypes. Aging was associated with clear neuroinflammation in female A20+/- mice only. The genetic predisposition in combination with an environmental stimulus exacerbates the behavioral impairments related to anxiety, cognitive dysfunction and sensorimotor gating. This was predominantly observed in females. Furthermore, signs of neuroinflammation were solely observed in female A20+/- mice. All above observations were made in the absence of peripheral inflammation and of changes in blood-brain barrier permeability, thus consistent with the CNS-primary hypothesis. Conclusions We show that A20 heterozygosity is a predisposing factor for NPSLE. Further mechanistic insight and possible therapeutic interventions can be studied in this mouse model that recapitulates several key hallmarks of the disease.
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Affiliation(s)
- C. Daems
- Laboratory of Behavioral and Developmental Genetics, Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - M. Sékulic
- Laboratory of Behavioral and Developmental Genetics, Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - V. Vulsteke
- Laboratory of Behavioral and Developmental Genetics, Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - G. van Loo
- VIB-UGent Center for Inflammation Research, Gent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Gent, Belgium
| | - R. D’Hooge
- Laboratory of Biological Psychology, KU Leuven, Leuven, Belgium
| | | | - P. Callaerts
- Laboratory of Behavioral and Developmental Genetics, Department of Human Genetics, KU Leuven, Leuven, Belgium
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Imai T, Shiraishi A, Nishiyama K, Ishimura M, Ohga S. Lipopolysaccharide-induced monocyte death in a novel ZnF7 domain mutation of TNFAIP3. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2020; 8:2071-2074.e5. [PMID: 32004749 DOI: 10.1016/j.jaip.2020.01.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 01/12/2020] [Accepted: 01/13/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Takashi Imai
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Akira Shiraishi
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kei Nishiyama
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masataka Ishimura
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
| | - Shouichi Ohga
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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45
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Martens A, van Loo G. A20 at the Crossroads of Cell Death, Inflammation, and Autoimmunity. Cold Spring Harb Perspect Biol 2020; 12:cshperspect.a036418. [PMID: 31427375 DOI: 10.1101/cshperspect.a036418] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A20 is a potent anti-inflammatory protein, acting by inhibiting nuclear factor κB (NF-κB) signaling and inflammatory gene expression and/or by preventing cell death. Mutations in the A20/TNFAIP3 gene have been associated with a plethora of inflammatory and autoimmune pathologies in humans and in mice. Although the anti-inflammatory role of A20 is well accepted, fundamental mechanistic questions regarding its mode of action remain unclear. Here, we review new findings that further clarify the molecular and cellular mechanisms by which A20 controls inflammatory signaling and cell death, and discuss new evidence for its involvement in inflammatory and autoimmune disease development.
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Affiliation(s)
- Arne Martens
- VIB Center for Inflammation Research, 9052 Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Geert van Loo
- VIB Center for Inflammation Research, 9052 Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
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46
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Odqvist L, Jevnikar Z, Riise R, Öberg L, Rhedin M, Leonard D, Yrlid L, Jackson S, Mattsson J, Nanda S, Cohen P, Knebel A, Arthur S, Thörn K, Svenungsson E, Jönsen A, Gunnarsson I, Tandre K, Alexsson A, Kastbom A, Rantapää-Dahlqvist S, Eloranta ML, Syvänen AC, Bengtsson A, Johansson P, Sandling JK, Sjöwall C, Rönnblom L, Collins B, Vaarala O. Genetic variations in A20 DUB domain provide a genetic link to citrullination and neutrophil extracellular traps in systemic lupus erythematosus. Ann Rheum Dis 2019; 78:1363-1370. [PMID: 31300459 PMCID: PMC6788882 DOI: 10.1136/annrheumdis-2019-215434] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 06/05/2019] [Accepted: 06/17/2019] [Indexed: 12/24/2022]
Abstract
OBJECTIVES Genetic variations in TNFAIP3 (A20) de-ubiquitinase (DUB) domain increase the risk of systemic lupus erythematosus (SLE) and rheumatoid arthritis. A20 is a negative regulator of NF-κB but the role of its DUB domain and related genetic variants remain unclear. We aimed to study the functional effects of A20 DUB-domain alterations in immune cells and understand its link to SLE pathogenesis. METHODS CRISPR/Cas9 was used to generate human U937 monocytes with A20 DUB-inactivating C103A knock-in (KI) mutation. Whole genome RNA-sequencing was used to identify differentially expressed genes between WT and C103A KI cells. Functional studies were performed in A20 C103A U937 cells and in immune cells from A20 C103A mice and genotyped healthy individuals with A20 DUB polymorphism rs2230926. Neutrophil extracellular trap (NET) formation was addressed ex vivo in neutrophils from A20 C103A mice and SLE-patients with rs2230926. RESULTS Genetic disruption of A20 DUB domain in human and murine myeloid cells did not give rise to enhanced NF-κB signalling. Instead, cells with C103A mutation or rs2230926 polymorphism presented an upregulated expression of PADI4, an enzyme regulating protein citrullination and NET formation, two key mechanisms in autoimmune pathology. A20 C103A cells exhibited enhanced protein citrullination and extracellular trap formation, which could be suppressed by selective PAD4 inhibition. Moreover, SLE-patients with rs2230926 showed increased NETs and increased frequency of autoantibodies to citrullinated epitopes. CONCLUSIONS We propose that genetic alterations disrupting the A20 DUB domain mediate increased susceptibility to SLE through the upregulation of PADI4 with resultant protein citrullination and extracellular trap formation.
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Affiliation(s)
- Lina Odqvist
- Research and Early Development, Respiratory, Inflammation and Autoimmune, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
| | - Zala Jevnikar
- Research and Early Development, Respiratory, Inflammation and Autoimmune, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
| | - Rebecca Riise
- Research and Early Development, Respiratory, Inflammation and Autoimmune, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
| | - Lisa Öberg
- Research and Early Development, Respiratory, Inflammation and Autoimmune, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
| | - Magdalena Rhedin
- Research and Early Development, Respiratory, Inflammation and Autoimmune, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
| | - Dag Leonard
- Department of Medical Sciences, Science for Life Laboratories, Uppsala University, Uppsala, Sweden
| | - Linda Yrlid
- Research and Early Development, Respiratory, Inflammation and Autoimmune, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
| | - Sonya Jackson
- Research and Early Development, Respiratory, Inflammation and Autoimmune, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
| | - Johan Mattsson
- Research and Early Development, Respiratory, Inflammation and Autoimmune, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
| | - Sambit Nanda
- MRC Protein Phosphorylation and Ubiquitylation Unit, University of Dundee, Dundee, UK
| | - Philip Cohen
- MRC Protein Phosphorylation and Ubiquitylation Unit, University of Dundee, Dundee, UK
| | - Axel Knebel
- MRC Protein Phosphorylation and Ubiquitylation Unit, University of Dundee, Dundee, UK
| | - Simon Arthur
- Division of Immunology and Cell Signaling, School of Life Sciences, University of Dundee, Dundee, UK
| | - Kristofer Thörn
- Research and Early Development, Respiratory, Inflammation and Autoimmune, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
| | - Elisabet Svenungsson
- Department of Medicine, Rheumatology Unit, Karolinska Institute, Stockholm, Sweden
| | - Andreas Jönsen
- Skåne University Hospital, Department of Clinical Science Lund, Rheumatology, Lund University, Lund, Sweden
| | - Iva Gunnarsson
- Department of Medicine, Rheumatology Unit, Karolinska Institute, Stockholm, Sweden
| | - Karolina Tandre
- Department of Medical Sciences, Science for Life Laboratories, Uppsala University, Uppsala, Sweden
| | - Andrei Alexsson
- Department of Medical Sciences, Science for Life Laboratories, Uppsala University, Uppsala, Sweden
| | - Alf Kastbom
- Department of Rheumatology and Department of Clinical and Experimental Medicine, Linköping University, Linkoping, Sweden
| | - Solbritt Rantapää-Dahlqvist
- Department of Public Health and Clinical Medicine/Rheumatology, Umeå Universitet Medicinska fakulteten, Umea, Sweden
| | - Maija-Leena Eloranta
- Department of Medical Sciences, Science for Life Laboratories, Uppsala University, Uppsala, Sweden
| | - Ann-Christine Syvänen
- Department of Medical Sciences, Science for Life Laboratories, Uppsala University, Uppsala, Sweden
| | - Anders Bengtsson
- Skåne University Hospital, Department of Clinical Science Lund, Rheumatology, Lund University, Lund, Sweden
| | - Patrik Johansson
- Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
| | - Johanna K Sandling
- Department of Medical Sciences, Science for Life Laboratories, Uppsala University, Uppsala, Sweden
| | - Christopher Sjöwall
- Department of Rheumatology and Department of Clinical and Experimental Medicine, Linköping University, Linkoping, Sweden
| | - Lars Rönnblom
- Department of Medical Sciences, Science for Life Laboratories, Uppsala University, Uppsala, Sweden
| | - Barry Collins
- Research and Early Development, Respiratory, Inflammation and Autoimmune, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
| | - Outi Vaarala
- Research and Early Development, Respiratory, Inflammation and Autoimmune, BioPharmaceuticals R&D, AstraZeneca R&D Gothenburg, Mölndal, Sweden
- Respiratory, Inflammation and Autoimmunity Department, MedImmune LLC, Gaithersburg, Maryland, USA
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Denisovan, modern human and mouse TNFAIP3 alleles tune A20 phosphorylation and immunity. Nat Immunol 2019; 20:1299-1310. [PMID: 31534238 DOI: 10.1038/s41590-019-0492-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 08/12/2019] [Indexed: 12/13/2022]
Abstract
Resisting and tolerating microbes are alternative strategies to survive infection, but little is known about the evolutionary mechanisms controlling this balance. Here genomic analyses of anatomically modern humans, extinct Denisovan hominins and mice revealed a TNFAIP3 allelic series with alterations in the encoded immune response inhibitor A20. Each TNFAIP3 allele encoded substitutions at non-catalytic residues of the ubiquitin protease OTU domain that diminished IκB kinase-dependent phosphorylation and activation of A20. Two TNFAIP3 alleles encoding A20 proteins with partial phosphorylation deficits seemed to be beneficial by increasing immunity without causing spontaneous inflammatory disease: A20 T108A;I207L, originating in Denisovans and introgressed in modern humans throughout Oceania, and A20 I325N, from an N-ethyl-N-nitrosourea (ENU)-mutagenized mouse strain. By contrast, a rare human TNFAIP3 allele encoding an A20 protein with 95% loss of phosphorylation, C243Y, caused spontaneous inflammatory disease in humans and mice. Analysis of the partial-phosphorylation A20 I325N allele in mice revealed diminished tolerance of bacterial lipopolysaccharide and poxvirus inoculation as tradeoffs for enhanced immunity.
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Priem D, Devos M, Druwé S, Martens A, Slowicka K, Ting AT, Pasparakis M, Declercq W, Vandenabeele P, van Loo G, Bertrand MJM. A20 protects cells from TNF-induced apoptosis through linear ubiquitin-dependent and -independent mechanisms. Cell Death Dis 2019; 10:692. [PMID: 31534131 PMCID: PMC6751190 DOI: 10.1038/s41419-019-1937-y] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/21/2019] [Accepted: 08/29/2019] [Indexed: 12/13/2022]
Abstract
The cytokine TNF promotes inflammation either directly by activating the MAPK and NF-κB signaling pathways, or indirectly by triggering cell death. A20 is a potent anti-inflammatory molecule, and mutations in the gene encoding A20 are associated with a wide panel of inflammatory pathologies, both in human and in the mouse. Binding of TNF to TNFR1 triggers the NF-κB-dependent expression of A20 as part of a negative feedback mechanism preventing sustained NF-κB activation. Apart from acting as an NF-κB inhibitor, A20 is also well-known for its ability to counteract the cytotoxic potential of TNF. However, the mechanism by which A20 mediates this function and the exact cell death modality that it represses have remained incompletely understood. In the present study, we provide in vitro and in vivo evidences that deletion of A20 induces RIPK1 kinase-dependent and -independent apoptosis upon single TNF stimulation. We show that constitutively expressed A20 is recruited to TNFR1 signaling complex (Complex I) via its seventh zinc finger (ZF7) domain, in a cIAP1/2-dependent manner, within minutes after TNF sensing. We demonstrate that Complex I-recruited A20 protects cells from apoptosis by stabilizing the linear (M1) ubiquitin network associated to Complex I, a process independent of its E3 ubiquitin ligase and deubiquitylase (DUB) activities and which is counteracted by the DUB CYLD, both in vitro and in vivo. In absence of linear ubiquitylation, A20 is still recruited to Complex I via its ZF4 and ZF7 domains, but this time protects the cells from death by deploying its DUB activity. Together, our results therefore demonstrate two distinct molecular mechanisms by which constitutively expressed A20 protect cells from TNF-induced apoptosis.
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Affiliation(s)
- Dario Priem
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Michael Devos
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Sarah Druwé
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Arne Martens
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Karolina Slowicka
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Adrian T Ting
- Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Manolis Pasparakis
- Institute for Genetics, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD) and Center for Molecular Medicine, University of Cologne, Cologne, Germany
| | - Wim Declercq
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Peter Vandenabeele
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Geert van Loo
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Mathieu J M Bertrand
- Center for Inflammation Research, VIB, Ghent, Belgium. .,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
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Griewahn L, Köser A, Maurer U. Keeping Cell Death in Check: Ubiquitylation-Dependent Control of TNFR1 and TLR Signaling. Front Cell Dev Biol 2019; 7:117. [PMID: 31316982 PMCID: PMC6609852 DOI: 10.3389/fcell.2019.00117] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 06/11/2019] [Indexed: 01/05/2023] Open
Abstract
Pro-inflammatory signaling pathways, induced by pathogens, tissue damage or cytokines, depend on the ubiquitylation of various subunits of receptor signaling complexes, controlled by ubiquitin ligases and deubiquitinases. Ubiquitylation sets the stage for the activation of kinases within these receptor complexes, which ultimately regulate pro-inflammatory gene expression. The receptors, which transduce pro-inflammatory signals, can often induce cell death, which is controlled by ubiquitylation as well. In this review, we discuss the key role of ubiquitylation in pro-inflammatory signaling by TNFR1 and TLRs and its role in setting the threshold for cell death induced by these pro-inflammatory triggers.
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Affiliation(s)
- Laura Griewahn
- Institute of Molecular Medicine and Cell Research, University of Freiburg, Freiburg im Breisgau, Germany.,Spemann Graduate School of Biology and Medicine, University of Freiburg, Freiburg im Breisgau, Germany.,Faculty of Biology, University of Freiburg, Freiburg im Breisgau, Germany
| | - Aaron Köser
- Institute of Molecular Medicine and Cell Research, University of Freiburg, Freiburg im Breisgau, Germany
| | - Ulrich Maurer
- Institute of Molecular Medicine and Cell Research, University of Freiburg, Freiburg im Breisgau, Germany.,Spemann Graduate School of Biology and Medicine, University of Freiburg, Freiburg im Breisgau, Germany.,BIOSS Centre for Biological Signalling Studies, Freiburg im Breisgau, Germany
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50
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Identification of functional missense single-nucleotide polymorphisms in TNFAIP3 in a predominantly Hispanic population. J Clin Transl Sci 2019; 2:350-355. [PMID: 31131138 PMCID: PMC6530917 DOI: 10.1017/cts.2019.3] [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] [Indexed: 12/11/2022] Open
Abstract
Background: Tumor necrosis factor alpha-induced protein 3 (TNFAIP3) is a multifunctional ubiquitin binding and editing enzyme that regulates inflammation. Genetic studies have implicated polymorphisms within the TNFAIP3 locus to the development of numerous immune-related diseases. This study evaluated the frequencies of single-nucleotide polymorphism (SNPs) within the exonic regions of the TNFAIP3 gene and an associated point mutation from the Illumina array among a predominantly Hispanic cohort. Methods: Genomic DNA was obtained from 721 participants and sequencing of all TNFAIP3 exons and an intergenic point mutation (rs6920220) was performed. In-vitro functional assessment was performed by transfecting mutated TNFAIP3 constructs into TNFAIP3 knockout cells containing the NF-kB luciferase reporter and stimulating with TNFα. Comparative statistics were performed with Student’s t-test for continuous variables and chi-squared test for categorical variables. Results: Sequencing revealed two missense SNPs, rs146534657:A>G and rs2230926:T>G, both within exon 3 of TNFAIP3, which encodes the protein’s deubiquitinating enzymatic domain. Frequencies of all three point mutations differed significantly across racial groups (χ2-test, P = 0.014 to P < 0.001). Compared to Caucasians, rs146534657:A>G was overrepresented among Hispanics (odds ratio (OR) [95% CI] 4.05 [1.24−13.18]), and rs2230926:T>G was more prevalent among African-Americans (OR [95% CI] 3.65 [1.58−8.43]). In-vitro assays confirm rs146534657:A>G and rs2230926:T>G decrease the ability of TNFAIP3 to abrogate NF-κB activation by 2-fold (P < 0.01) and 1.7-fold (P < 0.01), respectively. Conclusions: This study reports the frequency of rs146534657:A>G among Hispanics and is the first to evaluate its potential physiologic impact, establishing a basis for future research as a potential biomarker among this population.
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