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Waltho A, Popp O, Lenz C, Pluska L, Lambert M, Dötsch V, Mertins P, Sommer T. K48- and K63-linked ubiquitin chain interactome reveals branch- and length-specific ubiquitin interactors. Life Sci Alliance 2024; 7:e202402740. [PMID: 38803224 DOI: 10.26508/lsa.202402740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 05/08/2024] [Accepted: 05/08/2024] [Indexed: 05/29/2024] Open
Abstract
The ubiquitin (Ub) code denotes the complex Ub architectures, including Ub chains of different lengths, linkage types, and linkage combinations, which enable ubiquitination to control a wide range of protein fates. Although many linkage-specific interactors have been described, how interactors are able to decode more complex architectures is not fully understood. We conducted a Ub interactor screen, in humans and yeast, using Ub chains of varying lengths, as well as homotypic and heterotypic branched chains of the two most abundant linkage types-lysine 48-linked (K48) and lysine 63-linked (K63) Ub. We identified some of the first K48/K63-linked branch-specific Ub interactors, including histone ADP-ribosyltransferase PARP10/ARTD10, E3 ligase UBR4, and huntingtin-interacting protein HIP1. Furthermore, we revealed the importance of chain length by identifying interactors with a preference for Ub3 over Ub2 chains, including Ub-directed endoprotease DDI2, autophagy receptor CCDC50, and p97 adaptor FAF1. Crucially, we compared datasets collected using two common deubiquitinase inhibitors-chloroacetamide and N-ethylmaleimide. This revealed inhibitor-dependent interactors, highlighting the importance of inhibitor consideration during pulldown studies. This dataset is a key resource for understanding how the Ub code is read.
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Affiliation(s)
- Anita Waltho
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- Institute for Biology, Humboldt-University zu Berlin, Berlin, Germany
| | - Oliver Popp
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Christopher Lenz
- Institute for Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Frankfurt, Germany
| | - Lukas Pluska
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- Institute for Biology, Humboldt-University zu Berlin, Berlin, Germany
| | - Mahil Lambert
- Institute for Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Frankfurt, Germany
| | - Volker Dötsch
- Institute for Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Frankfurt, Germany
| | - Philipp Mertins
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Thomas Sommer
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- Institute for Biology, Humboldt-University zu Berlin, Berlin, Germany
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Wu B, Li D, Bai H, Mo R, Li H, Xie J, Zhang X, Yang Y, Li H, Idris A, Li X, Feng R. Mammalian reovirus µ1 protein attenuates RIG-I and MDA5-mediated signaling transduction by blocking IRF3 phosphorylation and nuclear translocation. Mol Immunol 2024; 170:131-143. [PMID: 38663254 DOI: 10.1016/j.molimm.2024.04.010] [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: 10/04/2023] [Revised: 04/02/2024] [Accepted: 04/15/2024] [Indexed: 05/13/2024]
Abstract
Mammalian reovirus (MRV) is a non-enveloped, gene segmented double-stranded RNA (dsRNA) virus. It is an important zoonotic pathogen that infects many mammals and vertebrates that act as natural hosts and causes respiratory and digestive tract diseases. Studies have reported that RIG-I and MDA5 in the innate immune cytoplasmic RNA-sensing RIG-like receptor (RLR) signaling pathway can recognize dsRNA from MRV and promote antiviral type I interferon (IFN) responses. However, the mechanism by which many MRV-encoded proteins evade the host innate immune response remains unclear. Here, we show that exogenous μ1 protein promoted the proliferation of MRV in vitro, while knockdown of MRV μ1 protein expression by shRNA could impair MRV proliferation. Specifically, μ1 protein inhibited MRV or poly(I:C)-induced IFN-β expression, and attenuated RIG-I/MDA5-mediated signaling axis transduction during MRV infection. Importantly, we found that μ1 protein significantly decreased IFN-β mRNA expression induced by MDA5, RIG-I, MAVS, TBK1, IRF3(5D), and degraded the protein expression of exogenous MDA5, RIG-I, MAVS, TBK1 and IRF3 via the proteasomal and lysosomal pathways. Additionally, we show that μ1 protein can physically interact with MDA5, RIG-I, MAVS, TBK1, and IRF3 and attenuate the RIG-I/MDA5-mediated signaling cascades by blocking the phosphorylation and nuclear translocation of IRF3. In conclusion, our findings reveal that MRV outer capsid protein μ1 is a key factor in antagonizing RLRs signaling cascades and provide new strategies for effective prevention and treatment of MRV infection.
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Affiliation(s)
- Bei Wu
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China; College of Life science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Dianyu Li
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China; College of Life science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Huisheng Bai
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China; College of Life science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Rongqian Mo
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China; College of Life science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Hongshan Li
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China; College of Life science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Jingying Xie
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China; College of Life science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Xiangbo Zhang
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China; College of Life science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Yanmei Yang
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China; College of Life science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Huixia Li
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China; Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou, China
| | - Adi Idris
- School of Biomedical Sciences, Centre for Immunology and Infection Control, Herston, Queensland University of Technology, China; Menzies Health Institute Queensland, School of Pharmacy and Medical Science, Griffith University, Southport, Queensland, Australia
| | - Xiangrong Li
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China; Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou, China.
| | - Ruofei Feng
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China; Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou, China.
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Rong Q, Xi Z, Guo D, Xu W, Zhang L, Wu Q. Regulation of ubiquitination and antiviral activity of Cactin by deubiquitinase Usp14 in Drosophila. J Virol 2024; 98:e0017724. [PMID: 38563731 DOI: 10.1128/jvi.00177-24] [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: 01/25/2024] [Accepted: 03/10/2024] [Indexed: 04/04/2024] Open
Abstract
Cactin, a highly conserved protein, plays a crucial role in various physiological processes in eukaryotes, including innate immunity. Recently, the function of Cactin in the innate immunity of Drosophila has been explored, revealing that Cactin regulates a non-canonical signaling pathway associated with the Toll and Imd pathways via the Cactin-Deaf1 axis. In addition, Cactin exhibits specific antiviral activity against the Drosophila C virus (DCV) in Drosophila, with an unknown mechanism. During DCV infection, it has been confirmed that the protein level and antiviral activity of Cactin are regulated by ubiquitination. However, the precise ubiquitination and deubiquitination mechanisms of Cactin in Drosophila remain unexplored. In this study, we identified ubiquitin-specific protease 14 (Usp14) as a major deubiquitinase for Cactin through comprehensive deubiquitinase screening. Our results demonstrate that Usp14 interacts with the C_Cactus domain of Cactin via its USP domain. Usp14 efficiently removes K48- and K63-linked polyubiquitin chains from Cactin, thereby preventing its degradation through the ubiquitin-proteasome pathway. Usp14 significantly inhibits DCV replication in Drosophila cells by stabilizing Cactin. Moreover, Usp14-deficient fruit flies exhibit increased susceptibility to DCV infection compared to wild-type flies. Collectively, our findings reveal the regulation of ubiquitination and antiviral activity of Cactin by the deubiquitinase Usp14, providing valuable insights into the modulation of Cactin-mediated antiviral activity in Drosophila.IMPORTANCEViral infections pose a severe threat to human health, marked by high pathogenicity and mortality rates. Innate antiviral pathways, such as Toll, Imd, and JAK-STAT, are generally conserved across insects and mammals. Recently, the multi-functionality of Cactin in innate immunity has been identified in Drosophila. In addition to regulating a non-canonical signaling pathway through the Cactin-Deaf1 axis, Cactin exhibits specialized antiviral activity against the Drosophila C virus (DCV) with an unknown mechanism. A previous study emphasized the significance of the Cactin level, regulated by the ubiquitin-proteasome pathway, in modulating antiviral signaling. However, the regulatory mechanisms governing Cactin remain unexplored. In this study, we demonstrate that Usp14 stabilizes Cactin by preventing its ubiquitination and subsequent degradation. Furthermore, Usp14 plays a crucial role in regulating the antiviral function mediated by Cactin. Therefore, our findings elucidate the regulatory mechanism of Cactin in Drosophila, offering a potential target for the prevention and treatment of viral infections.
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Affiliation(s)
- Qiqi Rong
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
- Key Laboratory of Anhui Province for Emerging and Reemerging Infectious Diseases, University of Science and Technology of China, Hefei, China
| | - Zhichong Xi
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Dongyang Guo
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
- Key Laboratory of Anhui Province for Emerging and Reemerging Infectious Diseases, University of Science and Technology of China, Hefei, China
| | - Wen Xu
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
- Anhui Provincial Key Laboratory of Precision Pharmaceutical Preparations and Clinical Pharmacy, Hefei, Anhui, China
| | - Liqin Zhang
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
- Department of Immunology and Pathogen Biology, School of Basic Medical Sciences, Hangzhou Normal University, Hangzhou, China
| | - Qingfa Wu
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
- Division of Molecular Medicine, CAS Key Laboratory of Innate Immunity and Chronic Disease, University of Science and Technology of China, Hefei, Anhui, China
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Ducza L, Gaál B. The Neglected Sibling: NLRP2 Inflammasome in the Nervous System. Aging Dis 2024; 15:1006-1028. [PMID: 38722788 PMCID: PMC11081174 DOI: 10.14336/ad.2023.0926-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 09/26/2023] [Indexed: 05/13/2024] Open
Abstract
While classical NOD-like receptor pyrin domain containing protein 1 (NLRP1) and NLRP3 inflammasomal proteins have been extensively investigated, the contribution of NLRP2 is still ill-defined in the nervous system. Given the putative significance of NLRP2 in orchestrating neuroinflammation, further inquiry is needed to gain a better understanding of its connectome, hence its specific targeting may hold a promising therapeutic implication. Therefore, bioinformatical approach for extracting information, specifically in the context of neuropathologies, is also undoubtedly preferred. To the best of our knowledge, there is no review study selectively targeting only NLRP2. Increasing, but still fragmentary evidence should encourage researchers to thoroughly investigate this inflammasome in various animal- and human models. Taken together, herein we aimed to review the current literature focusing on the role of NLRP2 inflammasome in the nervous system and more importantly, we provide an algorithm-based protein network of human NLRP2 for elucidating potentially valuable molecular partnerships that can be the beginning of a new discourse and future therapeutic considerations.
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Affiliation(s)
- László Ducza
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Hungary, Hungary
| | - Botond Gaál
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Hungary, Hungary
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Liu J, Dai C, Yin L, Yang X, Yan J, Liu M, Wu H, Xiao J, Kong W, Xu Z, Feng H. STAT2 negatively regulates RIG-I in the antiviral innate immunity of black carp. FISH & SHELLFISH IMMUNOLOGY 2024; 148:109510. [PMID: 38521143 DOI: 10.1016/j.fsi.2024.109510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 03/05/2024] [Accepted: 03/15/2024] [Indexed: 03/25/2024]
Abstract
The signal transducer and activator of transcription 2 (STAT2), a downstream factor of type I interferons (IFNs), is a key component of the cellular antiviral immunity response. However, the role of STAT2 in the upstream of IFN signaling, such as the regulation of pattern recognition receptors (PRRs), remains unknown. In this study, STAT2 homologue of black carp (Mylopharyngodon piceus) has been cloned and characterized. The open reading frame (ORF) of bcSTAT2 comprises 2523 nucleotides and encodes 841 amino acids, which presents the conserved structure to that of mammalian STAT2. The dual-luciferase reporter assay and the plaque assay showed that bcSTAT2 possessed certain IFN-inducing ability and antiviral ability against both spring viremia of carp virus (SVCV) and grass carp reovirus (GCRV). Interestingly, we detected the association between bcSTAT2 and bcRIG-I through co-immunoprecipitation (co-IP) assay. Moreover, when bcSTAT2 was co-expressed with bcRIG-I, bcSTAT2 obviously suppressed bcRIG-I-induced IFN expression and antiviral activity. The subsequent co-IP assay and immunoblotting (IB) assay further demonstrated that bcSTAT2 inhibited K63-linked polyubiquitination but not K48-linked polyubiquitination of bcRIG-I, however, did not affect the oligomerization of bcRIG-I. Thus, our data conclude that black carp STAT2 negatively regulates RIG-I through attenuates its K63-linked ubiquitination, which sheds a new light on the regulation of the antiviral innate immunity cascade in vertebrates.
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Affiliation(s)
- Ji Liu
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China; College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China
| | - Chushan Dai
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Lijun Yin
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Xiao Yang
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Jun Yan
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Meiling Liu
- College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China
| | - Hui Wu
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Jun Xiao
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Weiguang Kong
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Zhen Xu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Hao Feng
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China.
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Yoneyama M, Kato H, Fujita T. Physiological functions of RIG-I-like receptors. Immunity 2024; 57:731-751. [PMID: 38599168 DOI: 10.1016/j.immuni.2024.03.003] [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: 01/20/2024] [Revised: 02/19/2024] [Accepted: 03/04/2024] [Indexed: 04/12/2024]
Abstract
RIG-I-like receptors (RLRs) are crucial for pathogen detection and triggering immune responses and have immense physiological importance. In this review, we first summarize the interferon system and innate immunity, which constitute primary and secondary responses. Next, the molecular structure of RLRs and the mechanism of sensing non-self RNA are described. Usually, self RNA is refractory to the RLR; however, there are underlying host mechanisms that prevent immune reactions. Studies have revealed that the regulatory mechanisms of RLRs involve covalent molecular modifications, association with regulatory factors, and subcellular localization. Viruses have evolved to acquire antagonistic RLR functions to escape the host immune reactions. Finally, the pathologies caused by the malfunction of RLR signaling are described.
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Affiliation(s)
- Mitsutoshi Yoneyama
- Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, Chiba, Japan; Division of Pandemic and Post-disaster Infectious Diseases, Research Institute of Disaster Medicine, Chiba University, Chiba, Japan
| | - Hiroki Kato
- Institute of Cardiovascular Immunology, Medical Faculty, University Hospital Bonn, University of Bonn, Bonn, Germany
| | - Takashi Fujita
- Institute of Cardiovascular Immunology, Medical Faculty, University Hospital Bonn, University of Bonn, Bonn, Germany; Laboratory of Regulatory Information, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan.
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Shi M, Zhang H, Ma L, Wang X, Sun D, Feng Z. Innovative prognostic modeling in ESCC: leveraging scRNA-seq and bulk-RNA for dendritic cell heterogeneity analysis. Front Immunol 2024; 15:1352454. [PMID: 38515748 PMCID: PMC10956130 DOI: 10.3389/fimmu.2024.1352454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 02/21/2024] [Indexed: 03/23/2024] Open
Abstract
Background Globally, esophageal squamous cell carcinoma (ESCC) stands out as a common cancer type, characterized by its notably high rates of occurrence and mortality. Recent advancements in treatment methods, including immunotherapy, have shown promise, yet the prognosis remains poor. In the context of tumor development and treatment outcomes, the tumor microenvironment (TME), especially the function of dendritic cells (DCs), is significantly influential. Our study aims to delve deeper into the heterogeneity of DCs in ESCC using single-cell RNA sequencing (scRNA-seq) and bulk RNA analysis. Methods In the scRNA-seq analysis, we utilized the SCP package for result visualization and functional enrichment analysis of cell subpopulations. CellChat was employed to identify potential oncogenic mechanisms in DCs, while Monocle 2 traced the evolutionary trajectory of the three DC subtypes. CopyKAT assessed the benign or malignant nature of cells, and SCENIC conducted transcription factor regulatory network analysis, offering a preliminary exploration of DC heterogeneity. In Bulk-RNA analysis, we constructed a prognostic model for ESCC prognosis and immunotherapy response, based on DC marker genes. This model was validated through quantitative PCR (qPCR) and immunohistochemistry (IHC), confirming the gene expression levels. Results In this study, through intercellular communication analysis, we identified GALECTIN and MHC-I signaling pathways as potential oncogenic mechanisms within dendritic cells. We categorized DCs into three subtypes: plasmacytoid (pDC), conventional (cDC), and tolerogenic (tDC). Our findings revealed that pDCs exhibited an increased proportion of cells in the G2/M and S phases, indicating enhanced cellular activity. Pseudotime trajectory analysis demonstrated that cDCs were in early stages of differentiation, whereas tDCs were in more advanced stages, with pDCs distributed across both early and late differentiation phases. Prognostic analysis highlighted a significant correlation between pDCs and tDCs with the prognosis of ESCC (P< 0.05), while no significant correlation was observed between cDCs and ESCC prognosis (P = 0.31). The analysis of cell malignancy showed the lowest proportion of malignant cells in cDCs (17%), followed by pDCs (29%), and the highest in tDCs (48%), with these results being statistically significant (P< 0.05). We developed a robust ESCC prognostic model based on marker genes of pDCs and tDCs in the GSE53624 cohort (n = 119), which was validated in the TCGA-ESCC cohort (n = 139) and the IMvigor210 immunotherapy cohort (n = 298) (P< 0.05). Additionally, we supplemented the study with a novel nomogram that integrates clinical features and risk assessments. Finally, the expression levels of genes involved in the model were validated using qPCR (n = 8) and IHC (n = 16), thereby confirming the accuracy of our analysis. Conclusion This study enhances the understanding of dendritic cell heterogeneity in ESCC and its impact on patient prognosis. The insights gained from scRNA-seq and Bulk-RNA analysis contribute to the development of novel biomarkers and therapeutic targets. Our prognostic models based on DC-related gene signatures hold promise for improving ESCC patient stratification and guiding treatment decisions.
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Affiliation(s)
- Mengnan Shi
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
- Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, Hebei, China
- Hebei Clinical Research Center for Digestive Diseases, Hebei Institute of Gastroenterology, Shijiazhuang, Hebei, China
| | - Han Zhang
- Clinical School of Thoracic, Tianjin Medical University, Tianjin, China
| | - Linnan Ma
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
- Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, Hebei, China
- Hebei Clinical Research Center for Digestive Diseases, Hebei Institute of Gastroenterology, Shijiazhuang, Hebei, China
| | - Xiaoting Wang
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
- Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, Hebei, China
- Hebei Clinical Research Center for Digestive Diseases, Hebei Institute of Gastroenterology, Shijiazhuang, Hebei, China
| | - Daqiang Sun
- Tianjin Chest Hospital, Tianjin University, Tianjin, China
| | - Zhijie Feng
- Department of Gastroenterology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
- Hebei Key Laboratory of Gastroenterology, Hebei Institute of Gastroenterology, Shijiazhuang, Hebei, China
- Hebei Clinical Research Center for Digestive Diseases, Hebei Institute of Gastroenterology, Shijiazhuang, Hebei, China
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Wu MY, Li ZW, Lu JH. Molecular Modulators and Receptors of Selective Autophagy: Disease Implication and Identification Strategies. Int J Biol Sci 2024; 20:751-764. [PMID: 38169614 PMCID: PMC10758101 DOI: 10.7150/ijbs.83205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 08/31/2023] [Indexed: 01/05/2024] Open
Abstract
Autophagy is a highly conserved physiological process that maintains cellular homeostasis by recycling cellular contents. Selective autophagy is based on the specificity of cargo recognition and has been implicated in various human diseases, including neurodegenerative diseases and cancer. Selective autophagy receptors and modulators play key roles in this process. Identifying these receptors and modulators and their roles is critical for understanding the machinery and physiological function of selective autophagy and providing therapeutic value for diseases. Using modern researching tools and novel screening technologies, an increasing number of selective autophagy receptors and modulators have been identified. A variety of Strategies and approaches, including protein-protein interactions (PPIs)-based identification and genome-wide screening, have been used to identify selective autophagy receptors and modulators. Understanding the strengths and challenges of these approaches not only promotes the discovery of even more such receptors and modulators but also provides a useful reference for the identification of regulatory proteins or genes involved in other cellular mechanisms. In this review, we summarize the functions, disease association, and identification strategies of selective autophagy receptors and modulators.
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Affiliation(s)
| | | | - Jia-Hong Lu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
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Cheng H, Zhang H, Cai H, Liu M, Wen S, Ren J. Molecular biology of canine parainfluenza virus V protein and its potential applications in tumor immunotherapy. Front Microbiol 2023; 14:1282112. [PMID: 38173672 PMCID: PMC10761501 DOI: 10.3389/fmicb.2023.1282112] [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: 08/23/2023] [Accepted: 11/29/2023] [Indexed: 01/05/2024] Open
Abstract
Canine parainfluenza virus (CPIV) is a zoonotic virus that is widely distributed and is the main pathogen causing canine infectious respiratory disease (CIRD), also known as "kennel cough," in dogs. The CPIV-V protein is the only nonstructural protein of the virus and plays an important role in multiple stages of the virus life cycle by inhibiting apoptosis, altering the host cell cycle and interfering with the interferon response. In addition, studies have shown that the V protein has potential applications in the field of immunotherapy in oncolytic virus therapy or self-amplifying RNA vaccines. In this review, the biosynthesis, structural characteristics and functions of the CPIV-V protein are reviewed with an emphasis on how it facilitates viral immune escape and its potential applications in the field of immunotherapy. Therefore, this review provides a scientific basis for research into the CPIV-V protein and its potential applications.
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Affiliation(s)
- Huai Cheng
- Wenzhou Key Laboratory for Virology and Immunology, Institute of Virology, Wenzhou University, Wenzhou, China
| | - Hewei Zhang
- College of Food and Drugs, Luoyang Polytechnic, Luoyang, China
- Animal Diseases and Public Health Engineering Research Center of Henan Province, Luoyang, China
| | - Huanchang Cai
- Wenzhou Key Laboratory for Virology and Immunology, Institute of Virology, Wenzhou University, Wenzhou, China
| | - Min Liu
- Wenzhou Key Laboratory for Virology and Immunology, Institute of Virology, Wenzhou University, Wenzhou, China
| | - Shubo Wen
- Preventive Veterinary Laboratory, College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, China
| | - Jingqiang Ren
- Wenzhou Key Laboratory for Virology and Immunology, Institute of Virology, Wenzhou University, Wenzhou, China
- Animal Diseases and Public Health Engineering Research Center of Henan Province, Luoyang, China
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Zhai H, Wang T, Liu D, Pan L, Sun Y, Qiu HJ. Autophagy as a dual-faced host response to viral infections. Front Cell Infect Microbiol 2023; 13:1289170. [PMID: 38125906 PMCID: PMC10731275 DOI: 10.3389/fcimb.2023.1289170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 11/10/2023] [Indexed: 12/23/2023] Open
Abstract
Autophagy selectively degrades viral particles or cellular components, either facilitating or inhibiting viral replication. Conversely, most viruses have evolved strategies to escape or exploit autophagy. Moreover, autophagy collaborates with the pattern recognition receptor signaling, influencing the expression of adaptor molecules involved in the innate immune response and regulating the expression of interferons (IFNs). The intricate relationship between autophagy and IFNs plays a critical role in the host cell defense against microbial invasion. Therefore, it is important to summarize the interactions between viral infections, autophagy, and the host defense mechanisms against viruses. This review specifically focuses on the interactions between autophagy and IFN pathways during viral infections, providing a comprehensive summary of the molecular mechanisms utilized or evaded by different viruses.
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Affiliation(s)
| | | | | | | | - Yuan Sun
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Hua-Ji Qiu
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
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11
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Gong Y, Tong H, Yu F, Liu Q, Huang X, Ren G, Fan Z, Wang Z, Zhao J, Mao Z, Zhang J, Zhou R. CCDC50, an essential driver involved in tumorigenesis, is a potential severity marker of diffuse large B cell lymphoma. Ann Hematol 2023; 102:3153-3165. [PMID: 37684379 PMCID: PMC10567943 DOI: 10.1007/s00277-023-05409-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 08/08/2023] [Indexed: 09/10/2023]
Abstract
Diffuse Large B Cell Lymphoma (DLBCL) is the most common form of blood cancer. Among the subtypes, the activated B-cell (ABC) subtype is typically more aggressive and associated with worse outcomes. However, the underlying mechanisms are not fully understood. In this study, we performed microarray analysis to identify potential ABC-DLBCL-associated genes. We employed Kaplan-Meier methods and cox univariate analysis to explore the prognostic value of the identified candidate gene Coiled-coil domain containing 50 (CCDC50). Additionally, we used DLBCL cell lines and mouse models to explore the functions and mechanisms of CCDC50. Finally, we isolated CCDC50-bearing exosomes from clinical patients to study the correlation between these exosomes and disease severity. Our results demonstrated that CCDC50 not only showed significantly positive correlations with ABC subtype, tumor stage and number of extranodal sites, but also suggested poor outcomes in DLBCL patients. We further found that CCDC50 promoted ABC-DLBCL proliferation in vitro and in vivo. Mechanistically, CCDC50 inhibited ubiquitination-mediated c-Myc degradation by stimulating the PI3K/AKT/GSK-3β pathway. Moreover, CCDC50 expression was positively correlated with c-Myc at protein levels in DLBCL patients. Additionally, in two clinical cohorts, the plasma CCDC50-positive exosomes differentiated DLBCL subtypes robustly (AUC > 0.80) and predicted disease severity effectively (p < 0.05). Our findings suggest that CCDC50 likely drives disease progression in ABC-DLBCL patients, and the CCDC50-bearing exosome holds great potential as a non-invasive biomarker for subtype diagnosis and prognosis prediction of DLBCL patients.
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Affiliation(s)
- Yuqi Gong
- Department of Pathology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Department of Pathology and Pathophysiology, Zhejiang University School of Medicine, Hangzhou, China
| | - Hongyan Tong
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Fang Yu
- Department of Pathology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qi Liu
- Department of Pathology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xianbo Huang
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Guoping Ren
- Department of Pathology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Department of Pathology and Pathophysiology, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhongqin Fan
- Department of Pathology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhe Wang
- Department of Pathology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Jing Zhao
- Department of Pathology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhengrong Mao
- Department of Pathology and Pathophysiology, Zhejiang University School of Medicine, Hangzhou, China.
- Department of Pathology, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
| | - Jing Zhang
- Department of Pathology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
- Department of Pathology and Pathophysiology, Zhejiang University School of Medicine, Hangzhou, China.
| | - Ren Zhou
- Department of Pathology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
- Department of Pathology and Pathophysiology, Zhejiang University School of Medicine, Hangzhou, China.
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12
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Jia P, Tian T, Li Z, Wang Y, Lin Y, Zeng W, Ye Y, He M, Ni X, Pan J, Dong X, Huang J, Li C, Guo D, Hou P. CCDC50 promotes tumor growth through regulation of lysosome homeostasis. EMBO Rep 2023; 24:e56948. [PMID: 37672005 PMCID: PMC10561174 DOI: 10.15252/embr.202356948] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 07/26/2023] [Accepted: 08/16/2023] [Indexed: 09/07/2023] Open
Abstract
The maintenance of lysosome homeostasis is crucial for cell growth. Lysosome-dependent degradation and metabolism sustain tumor cell survival. Here, we demonstrate that CCDC50 serves as a lysophagy receptor, promoting tumor progression and invasion by controlling lysosomal integrity and renewal. CCDC50 monitors lysosomal damage, recognizes galectin-3 and K63-linked polyubiquitination on damaged lysosomes, and specifically targets them for autophagy-dependent degradation. CCDC50 deficiency causes the accumulation of ruptured lysosomes, impaired autophagic flux, and superfluous reactive oxygen species, consequently leading to cell death and tumor suppression. CCDC50 expression is associated with malignancy, progression to metastasis, and poor overall survival in human melanoma. Targeting CCDC50 suppresses tumor growth and lung metastasis, and enhances the effect of BRAFV600E inhibition. Thus, we demonstrate critical roles of CCDC50-mediated clearance of damaged lysosomes in supporting tumor growth, hereby identifying a potential therapeutic target of melanoma.
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Affiliation(s)
- Penghui Jia
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of MedicineSun Yat‐sen UniversityShenzhenChina
| | - Tian Tian
- The Center for Applied Genomics, Abramson Research CenterThe Children's Hospital of PhiladelphiaPhiladelphiaPAUSA
| | - Zibo Li
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of MedicineSun Yat‐sen UniversityShenzhenChina
| | - Yicheng Wang
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of MedicineSun Yat‐sen UniversityShenzhenChina
| | - Yuxin Lin
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of MedicineSun Yat‐sen UniversityShenzhenChina
| | - Weijie Zeng
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of MedicineSun Yat‐sen UniversityShenzhenChina
| | - Yu Ye
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of MedicineSun Yat‐sen UniversityShenzhenChina
| | - Miao He
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of MedicineSun Yat‐sen UniversityShenzhenChina
| | - Xiangrong Ni
- Department of Neurosurgery/Neuro‐oncology, Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaGuangzhouChina
| | - Ji'an Pan
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of MedicineSun Yat‐sen UniversityShenzhenChina
| | - Xiaonan Dong
- Guangzhou LaboratoryGuangzhou International Bio‐IslandGuangzhouChina
| | - Jian Huang
- Coriell Institute for Medical ResearchCamdenNJUSA
| | - Chun‐mei Li
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of MedicineSun Yat‐sen UniversityShenzhenChina
| | - Deyin Guo
- Guangzhou LaboratoryGuangzhou International Bio‐IslandGuangzhouChina
| | - Panpan Hou
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of MedicineSun Yat‐sen UniversityShenzhenChina
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina
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13
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Chen L, Yang L, Li Y, Liu T, Yang B, Liu L, Wu R. Autophagy and Inflammation: Regulatory Roles in Viral Infections. Biomolecules 2023; 13:1454. [PMID: 37892135 PMCID: PMC10604974 DOI: 10.3390/biom13101454] [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: 08/25/2023] [Revised: 09/19/2023] [Accepted: 09/19/2023] [Indexed: 10/29/2023] Open
Abstract
Autophagy is a highly conserved intracellular degradation pathway in eukaryotic organisms, playing an adaptive role in various pathophysiological processes throughout evolution. Inflammation is the immune system's response to external stimuli and tissue damage. However, persistent inflammatory reactions can lead to a range of inflammatory diseases and cancers. The interaction between autophagy and inflammation is particularly evident during viral infections. As a crucial regulator of inflammation, autophagy can either promote or inhibit the occurrence of inflammatory responses. In turn, inflammation can establish negative feedback loops by modulating autophagy to suppress excessive inflammatory reactions. This interaction is pivotal in the pathogenesis of viral diseases. Therefore, elucidating the regulatory roles of autophagy and inflammation in viral infections will significantly enhance our understanding of the mechanisms underlying related diseases. Furthermore, it will provide new insights and theoretical foundations for disease prevention, treatment, and drug development.
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Affiliation(s)
- Li Chen
- School of Medicine, Jiamusi University, Jiamusi 154007, China; (L.C.); (Y.L.); (T.L.); (B.Y.)
| | - Limin Yang
- School of Medicine, Dalian University, Dalian 116622, China;
| | - Yingyu Li
- School of Medicine, Jiamusi University, Jiamusi 154007, China; (L.C.); (Y.L.); (T.L.); (B.Y.)
| | - Tianrun Liu
- School of Medicine, Jiamusi University, Jiamusi 154007, China; (L.C.); (Y.L.); (T.L.); (B.Y.)
| | - Bolun Yang
- School of Medicine, Jiamusi University, Jiamusi 154007, China; (L.C.); (Y.L.); (T.L.); (B.Y.)
| | - Lei Liu
- School of Medicine, Jiamusi University, Jiamusi 154007, China; (L.C.); (Y.L.); (T.L.); (B.Y.)
| | - Rui Wu
- School of Medicine, Jiamusi University, Jiamusi 154007, China; (L.C.); (Y.L.); (T.L.); (B.Y.)
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14
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Chen D, Ji Q, Liu J, Cheng F, Zheng J, Ma Y, He Y, Zhang J, Song T. MicroRNAs in the Regulation of RIG-I-like Receptor Signaling Pathway: Possible Strategy for Viral Infection and Cancer. Biomolecules 2023; 13:1344. [PMID: 37759744 PMCID: PMC10526236 DOI: 10.3390/biom13091344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 08/30/2023] [Accepted: 08/30/2023] [Indexed: 09/29/2023] Open
Abstract
The retinoic acid-inducible gene I (RIG-I)-like receptors (RLRs) play a crucial role as pattern-recognition receptors within the innate immune system. These receptors, present in various cell and tissue types, serve as essential sensors for viral infections, enhancing the immune system's capacity to combat infections through the induction of type I interferons (IFN-I) and inflammatory cytokines. RLRs are involved in a variety of physiological and pathological processes, including viral infections, autoimmune disorders, and cancer. An increasing body of research has examined the possibility of RLRs or microRNAs as therapeutic targets for antiviral infections and malignancies, despite the fact that few studies have focused on the regulatory function of microRNAs on RLR signaling. Consequently, our main emphasis in this review is on elucidating the role of microRNAs in modulating the signaling pathways of RLRs in the context of cancer and viral infections. The aim is to establish a robust knowledge base that can serve as a basis for future comprehensive investigations into the interplay between microRNAs and RIG-I, while also facilitating the advancement of therapeutic drug development.
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Affiliation(s)
- Dengwang Chen
- Department of Immunology, Zunyi Medical University, Zunyi 563002, China; (D.C.); (J.L.); (F.C.); (J.Z.); (Y.M.)
| | - Qinglu Ji
- School of Pharmacy, Zunyi Medical University, Zunyi 563002, China; (Q.J.); (Y.H.)
| | - Jing Liu
- Department of Immunology, Zunyi Medical University, Zunyi 563002, China; (D.C.); (J.L.); (F.C.); (J.Z.); (Y.M.)
| | - Feng Cheng
- Department of Immunology, Zunyi Medical University, Zunyi 563002, China; (D.C.); (J.L.); (F.C.); (J.Z.); (Y.M.)
| | - Jishan Zheng
- Department of Immunology, Zunyi Medical University, Zunyi 563002, China; (D.C.); (J.L.); (F.C.); (J.Z.); (Y.M.)
| | - Yunyan Ma
- Department of Immunology, Zunyi Medical University, Zunyi 563002, China; (D.C.); (J.L.); (F.C.); (J.Z.); (Y.M.)
| | - Yuqi He
- School of Pharmacy, Zunyi Medical University, Zunyi 563002, China; (Q.J.); (Y.H.)
| | - Jidong Zhang
- Department of Immunology, Zunyi Medical University, Zunyi 563002, China; (D.C.); (J.L.); (F.C.); (J.Z.); (Y.M.)
- Collaborative Innovation Center of Tissue Damage Repair and Regeneration Medicine, Zunyi Medical University, Zunyi 563002, China
- Special Key Laboratory of Gene Detection & Therapy of Guizhou Province, Zunyi Medical University, Zunyi 563002, China
| | - Tao Song
- Department of Immunology, Zunyi Medical University, Zunyi 563002, China; (D.C.); (J.L.); (F.C.); (J.Z.); (Y.M.)
- Collaborative Innovation Center of Tissue Damage Repair and Regeneration Medicine, Zunyi Medical University, Zunyi 563002, China
- Special Key Laboratory of Gene Detection & Therapy of Guizhou Province, Zunyi Medical University, Zunyi 563002, China
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15
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Li H, Yang S, Zeng K, Guo J, Wu J, Jiang H, Xie Y, Hu Z, Lu J, Yang J, Su XZ, Cui J, Yu X. SHIP1 modulates antimalarial immunity by bridging the crosstalk between type I IFN signaling and autophagy. mBio 2023; 14:e0351222. [PMID: 37366613 PMCID: PMC10470592 DOI: 10.1128/mbio.03512-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 04/24/2023] [Indexed: 06/28/2023] Open
Abstract
Stringent control of the type I interferon (IFN-I) signaling is critical for host immune defense against infectious diseases, yet the molecular mechanisms that regulate this pathway remain elusive. Here, we show that Src homology 2 containing inositol phosphatase 1 (SHIP1) suppresses IFN-I signaling by promoting IRF3 degradation during malaria infection. Genetic ablation of Ship1 in mice leads to high levels of IFN-I and confers resistance to Plasmodium yoelii nigeriensis (P.y.) N67 infection. Mechanistically, SHIP1 promotes the selective autophagic degradation of IRF3 by enhancing K63-linked ubiquitination of IRF3 at lysine 313, which serves as a recognition signal for NDP52-mediated selective autophagic degradation. In addition, SHIP1 is downregulated by IFN-I-induced miR-155-5p upon P.y. N67 infection and severs as a feedback loop of the signaling crosstalk. This study reveals a regulatory mechanism between IFN-I signaling and autophagy, and verifies SHIP1 can be a potential target for therapeutic intervention against malaria and other infectious diseases. IMPORTANCE Malaria remains a serious disease affecting millions of people worldwide. Malaria parasite infection triggers tightly controlled type I interferon (IFN-I) signaling that plays a critical role in host innate immunity; however, the molecular mechanisms underlying the immune responses are still elusive. Here, we discover a host gene [Src homology 2-containing inositol phosphatase 1 (SHIP1)] that can regulate IFN-I signaling by modulating NDP52-mediated selective autophagic degradation of IRF3 and significantly affect parasitemia and resistance of Plasmodium-infected mice. This study identifies SHIP1 as a potential target for immunotherapies in malaria and highlights the crosstalk between IFN-I signaling and autophagy in preventing related infectious diseases. SHIP1 functions as a negative regulator during malaria infection by targeting IRF3 for autophagic degradation.
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Affiliation(s)
- Hongyu Li
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Shuai Yang
- Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Ke Zeng
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Jiayin Guo
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Jian Wu
- Malaria Functional Genomics Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Huaji Jiang
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
- Yue Bei People's Hospital Postdoctoral Innovation Practice Base, Southern Medical University, Guangzhou, Guangdong, China
| | - Yingchao Xie
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Zhiqiang Hu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Jiansen Lu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
- Department of Joint Surgery, the Fifth Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, China
| | - Jianwu Yang
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
| | - Xin-zhuan Su
- Malaria Functional Genomics Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Jun Cui
- Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, MOE Key Laboratory of Gene Function and Regulation, School of Life Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Xiao Yu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Lab of Single Cell Technology and Application, Southern Medical University, Guangzhou, Guangdong, China
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16
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Li C, Jia Y, Li N, Zhou Q, Liu R, Wang Q. DNA methylation-mediated high expression of CCDC50 correlates with poor prognosis and hepatocellular carcinoma progression. Aging (Albany NY) 2023; 15:7424-7439. [PMID: 37552104 PMCID: PMC10457044 DOI: 10.18632/aging.204899] [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: 05/21/2023] [Accepted: 07/06/2023] [Indexed: 08/09/2023]
Abstract
Hepatocellular carcinoma (HCC) is one of the most common and lethal cancer types worldwide. Recent studies found Coiled-coil domain-containing protein 50 (CCDC50) could regulate the nuclear factor kappa-B and p53 signalling pathways in cancer. Nevertheless, the underlying biological function and potential mechanisms of CCDC50 driving the progression of HCC remain unclear. In this study, we found that CCDC50 was up-regulated in HCC, and its higher expression was associated with adverse clinical outcomes and poor clinical characteristics. The results of the Cox regression analysis revealed that CCDC50 was an independent factor for the prognosis of HCC. Meanwhile, we also established a nomogram based on CCDC50 to predict the 1-, 3-, or 5-year survival in HCC patients. Furthermore, we found that DNA hypomethylation results in its overexpression in HCC. In addition, functional annotation confirmed that CCDC50 was mainly involved in the neuroactive ligand-receptor interaction and protein digestion and absorption. Importantly, we found that CCDC50 was highly expressed in HCC cell lines. Depletion of CCDC50 significantly inhibits HCC cell proliferation and migration abilities. This is the first study to identify CCDC50 as a new potential prognostic biomarker and characterize the functional roles of CCDC50 in the progression of HCC, and provides a novel potential diagnostic and therapeutic biomarker for HCC in the future.
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Affiliation(s)
- Chunhong Li
- Department of Oncology, Suining Central Hospital, Suining 629000, Sichuan, P.R. China
| | - Yingdong Jia
- Gastrointestinal Surgical Unit, Suining Central Hospital, Suining 629000, Sichuan, P.R. China
| | - Na Li
- Department of Oncology, Suining Central Hospital, Suining 629000, Sichuan, P.R. China
| | - Qiang Zhou
- Department of Oncology, Suining Central Hospital, Suining 629000, Sichuan, P.R. China
| | - Rui Liu
- Department of Radiation Oncology, Suining Central Hospital, Suining 629000, Sichuan, P.R. China
| | - Qiang Wang
- Gastrointestinal Surgical Unit, Suining Central Hospital, Suining 629000, Sichuan, P.R. China
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17
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Li J, Zhou Y, Zhao W, Liu J, Ullah R, Fang P, Fang L, Xiao S. Porcine reproductive and respiratory syndrome virus degrades DDX10 via SQSTM1/p62-dependent selective autophagy to antagonize its antiviral activity. Autophagy 2023; 19:2257-2274. [PMID: 36779599 PMCID: PMC10351467 DOI: 10.1080/15548627.2023.2179844] [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: 08/08/2022] [Revised: 02/07/2023] [Accepted: 02/08/2023] [Indexed: 02/14/2023] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) is a typical immunosuppressive virus devastating the global swine industry. DEAD-box helicases (DDXs) are a family of ATP-dependent RNA helicases that are predominantly implicated in modulating cellular RNA metabolism. Meanwhile, a growing number of studies have suggested that some DDXs are associated with innate immunity and virus infection, so they are considered potential antiviral targets. Herein, we screened 40 DDXs and found that ectopic expression of DDX10 exhibited a significant anti-PRRSV effect, while DDX10 knockdown promoted PRRSV proliferation. Further analysis revealed that DDX10 positively regulates type I interferon production, which may contribute to its anti-PRRSV effect. Interestingly, PRRSV infection promoted DDX10 translocation from the nucleus to the cytoplasm for macroautophagic/autophagic degradation to block the antiviral effect of DDX10. By screening PRRSV-encoded proteins, we found that the viral envelope (E) protein interacted with DDX10. In line with the autophagic degradation of DDX10 during PRRSV infection, E protein could induce autophagy and reduce DDX10 expression in wild-type cells, but not in ATG5 or ATG7 knockout (KO) cells. When further screening the cargo receptors for autophagic degradation, we found that SQSTM1/p62 (sequestosome 1) interacted with both DDX10 and E protein, and E protein-mediated DDX10 degradation was almost entirely blocked in SQSTM1 KO cells, demonstrating that E protein degrades DDX10 by promoting SQSTM1-mediated selective autophagy. Our study reveals a novel mechanism by which PRRSV escapes host antiviral innate immunity through selective autophagy, providing a new target for developing anti-PRRSV drugs.Abbreviations: ACTB: actin beta; ATG: autophagy related; co-IP: co-immunoprecipitation; CQ: chloroquine; DDX10: DEAD-box helicase 10; E: envelope; EGFP: enhanced green fluorescent protein; hpi: hours post infection; hpt: hours post transfection; IFA: indirect immunofluorescence assay; IFN-I: type I IFN; IFNB/IFN-β: interferon beta; IRF3: interferon regulatory factor 3; ISGs: interferon-stimulated genes; KO: knockout; MAP1LC3B/LC3: microtubule associated protein 1 light chain 3 beta; mAb: monoclonal antibody; MOI: multiplicity of infection; NBR1: NBR1 autophagy cargo receptor; NFKB/NF-κB: nuclear factor kappa B; OPTN: optineurin; ORF: open reading frame; PRRSV: porcine reproductive and respiratory syndrome virus; SeV: sendai virus; siRNA: small interfering RNA; SQSTM1/p62: sequestosome 1; TCID50: 50% tissue culture infective dose; WT: wild type.
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Affiliation(s)
- Jia Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhannull, China
- Key Laboratory of Preventive Veterinary Medicine in Hubei Province, the Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China
| | - Yanrong Zhou
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhannull, China
- Key Laboratory of Preventive Veterinary Medicine in Hubei Province, the Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China
| | - Wenkai Zhao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhannull, China
- Key Laboratory of Preventive Veterinary Medicine in Hubei Province, the Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China
| | - Jiao Liu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhannull, China
- Key Laboratory of Preventive Veterinary Medicine in Hubei Province, the Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China
| | - Rizwan Ullah
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhannull, China
- Key Laboratory of Preventive Veterinary Medicine in Hubei Province, the Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China
| | - Puxian Fang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhannull, China
- Key Laboratory of Preventive Veterinary Medicine in Hubei Province, the Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China
| | - Liurong Fang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhannull, China
- Key Laboratory of Preventive Veterinary Medicine in Hubei Province, the Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China
| | - Shaobo Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhannull, China
- Key Laboratory of Preventive Veterinary Medicine in Hubei Province, the Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China
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Lachgar-Ruiz M, Morín M, Martelletti E, Ingham NJ, Preite L, Lewis MA, Serrão de Castro LS, Steel KP, Moreno-Pelayo MÁ. Insights into the pathophysiology of DFNA44 hearing loss associated with CCDC50 frameshift variants. Dis Model Mech 2023; 16:dmm049757. [PMID: 37165931 PMCID: PMC10445743 DOI: 10.1242/dmm.049757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 05/02/2023] [Indexed: 05/12/2023] Open
Abstract
Non-syndromic sensorineural hearing loss (SNHL) is the most common sensory disorder, and it presents a high genetic heterogeneity. As part of our clinical genetic studies, we ascertained a previously unreported mutation in CCDC50 [c.828_858del, p.(Asp276Glufs*40)] segregating with hearing impairment in a Spanish family with SNHL associated with the autosomal dominant deafness locus DFNA44, which is predicted to disrupt protein function. To gain insight into the mechanism behind DFNA44 mutations, we analysed two Ccdc50 presumed loss-of-function mouse mutants, which showed normal hearing thresholds up to 6 months of age, indicating that haploinsufficiency is unlikely to be the pathogenic mechanism. We then carried out in vitro studies on a set of artificial mutants and on the p.(Asp276Glufs*40) and p.(Phe292Hisfs*37) human mutations, and determined that only the mutants containing the six-amino-acid sequence CLENGL as part of their aberrant protein tail showed an abnormal distribution consisting of perinuclear aggregates of the CCDC50 protein (also known as Ymer). Therefore, we conclude that the CLENGL sequence is necessary to form these aggregates. Taken together, the in vivo and in vitro results obtained in this study suggest that the two identified mutations in CCDC50 exert their effect through a dominant-negative or gain-of-function mechanism rather than by haploinsufficiency.
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Affiliation(s)
- María Lachgar-Ruiz
- Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London SE1 1UL, UK
- Servicio de Genética, Hospital Universitario Ramón y Cajal, IRYCIS and Biomedical Network Research Centre on Rare Diseases (CIBERER), km 9.100, 28034 Madrid, Spain
| | - Matías Morín
- Servicio de Genética, Hospital Universitario Ramón y Cajal, IRYCIS and Biomedical Network Research Centre on Rare Diseases (CIBERER), km 9.100, 28034 Madrid, Spain
| | - Elisa Martelletti
- Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London SE1 1UL, UK
| | - Neil J. Ingham
- Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London SE1 1UL, UK
| | - Lorenzo Preite
- Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London SE1 1UL, UK
| | - Morag A. Lewis
- Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London SE1 1UL, UK
| | - Luciana Santos Serrão de Castro
- Servicio de Genética, Hospital Universitario Ramón y Cajal, IRYCIS and Biomedical Network Research Centre on Rare Diseases (CIBERER), km 9.100, 28034 Madrid, Spain
| | - Karen P. Steel
- Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London SE1 1UL, UK
| | - Miguel Ángel Moreno-Pelayo
- Servicio de Genética, Hospital Universitario Ramón y Cajal, IRYCIS and Biomedical Network Research Centre on Rare Diseases (CIBERER), km 9.100, 28034 Madrid, Spain
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You S, Xu J, Yin Z, Wu B, Wang P, Hao M, Cheng C, Liu M, Zhao Y, Jia P, Jiang H, Li D, Cao L, Zhang X, Zhang Y, Sun Y, Zhang N. Down-regulation of WWP2 aggravates Type 2 diabetes mellitus-induced vascular endothelial injury through modulating ubiquitination and degradation of DDX3X. Cardiovasc Diabetol 2023; 22:107. [PMID: 37149668 PMCID: PMC10164326 DOI: 10.1186/s12933-023-01818-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 03/29/2023] [Indexed: 05/08/2023] Open
Abstract
BACKGROUND Endothelial injury caused by Type 2 diabetes mellitus (T2DM) is considered as a mainstay in the pathophysiology of diabetic vascular complications (DVCs). However, the molecular mechanism of T2DM-induced endothelial injury remains largely unknown. Here, we found that endothelial WW domain-containing E3 ubiquitin protein ligase 2 (WWP2) act as a novel regulator for T2DM-induced vascular endothelial injury through modulating ubiquitination and degradation of DEAD-box helicase 3 X-linked (DDX3X). METHODS Single-cell transcriptome analysis was used to evaluate WWP2 expression in vascular endothelial cells of T2DM patients and healthy controls. Endothelial-specific Wwp2 knockout mice were used to investigate the effect of WWP2 on T2DM-induced vascular endothelial injury. In vitro loss- and gain-of-function studies were performed to assess the function of WWP2 on cell proliferation and apoptosis of human umbilical vein endothelial cells. The substrate protein of WWP2 was verified using mass spectrometry, coimmunoprecipitation assays and immunofluorescence assays. The mechanism of WWP2 regulation on substrate protein was investigated by pulse-chase assay and ubiquitination assay. RESULTS The expression of WWP2 was significantly down-regulated in vascular endothelial cells during T2DM. Endothelial-specific Wwp2 knockout in mice significantly aggravated T2DM-induced vascular endothelial injury and vascular remodeling after endothelial injury. Our in vitro experiments showed that WWP2 protected against endothelial injury by promoting cell proliferation and inhibiting apoptosis in ECs. Mechanically, we found that WWP2 is down-regulated in high glucose and palmitic acid (HG/PA)-induced ECs due to c-Jun N-terminal kinase (JNK) activation, and uncovered that WWP2 suppresses HG/PA-induced endothelial injury by catalyzing K63-linked polyubiquitination of DDX3X and targeting it for proteasomal degradation. CONCLUSION Our studies revealed the key role of endothelial WWP2 and the fundamental importance of the JNK-WWP2-DDX3X regulatory axis in T2DM-induced vascular endothelial injury, suggesting that WWP2 may serve as a new therapeutic target for DVCs.
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Affiliation(s)
- Shilong You
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Jiaqi Xu
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Zeyu Yin
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Boquan Wu
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Pengbo Wang
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Mingjun Hao
- Center of Reproductive Medicine, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Cheng Cheng
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Mengke Liu
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Yuanhui Zhao
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Pengyu Jia
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Hongkun Jiang
- Department of Pediatrics, The First Hospital of China Medical University, 155 North Nanjing Street, Shenyang, 110001, China
| | - Da Li
- Center of Reproductive Medicine, Shengjing Hospital of China Medical University, Shenyang, 110004, China
- Key Laboratory of Reproductive and Genetic Medicine (China Medical University), National Health Commission, Shenyang, 110004, China
| | - Liu Cao
- Key Laboratory of Medical Cell Biology, Ministry of Education, 77 Puhe Road, Shenbei New District, Shenyang, 110001, Liaoning Province, People's Republic of China
- Institute of School of Basic Medicine, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Xingang Zhang
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China.
| | - Ying Zhang
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China.
- Institute of School of Basic Medicine, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, 110001, Liaoning Province, People's Republic of China.
| | - Yingxian Sun
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China.
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, 110001, Liaoning Province, People's Republic of China.
| | - Naijin Zhang
- Department of Cardiology, The First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China.
- Key Laboratory of Reproductive and Genetic Medicine (China Medical University), National Health Commission, Shenyang, 110004, China.
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Ma Z, Bai J, Jiang C, Zhu H, Liu D, Pan M, Wang X, Pi J, Jiang P, Liu X. Tegument protein UL21 of alpha-herpesvirus inhibits the innate immunity by triggering CGAS degradation through TOLLIP-mediated selective autophagy. Autophagy 2023; 19:1512-1532. [PMID: 36343628 PMCID: PMC10241001 DOI: 10.1080/15548627.2022.2139921] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 10/19/2022] [Accepted: 10/20/2022] [Indexed: 11/09/2022] Open
Abstract
Alpha-herpesvirus causes lifelong infections and serious diseases in a wide range of hosts and has developed multiple strategies to counteract the host defense. Here, we demonstrate that the tegument protein UL21 (unique long region 21) in pseudorabies virus (PRV) dampens type I interferon signaling by triggering the degradation of CGAS (cyclic GMP-AMP synthase) through the macroautophagy/autophagy-lysosome pathway. Mechanistically, the UL21 protein scaffolds the E3 ligase UBE3C (ubiquitin protein ligase E3C) to catalyze the K27-linked ubiquitination of CGAS at Lys384, which is recognized by the cargo receptor TOLLIP (toll interacting protein) and degraded in the lysosome. Additionally, we show that the N terminus of UL21 in PRV is dominant in destabilizing CGAS-mediated innate immunity. Moreover, viral tegument protein UL21 in herpes simplex virus type 1 (HSV-1) also displays the conserved inhibitory mechanisms. Furthermore, by using PRV, we demonstrate the roles of UL21 in degrading CGAS to promote viral infection in vivo. Altogether, these findings describe a distinct pathway where alpha-herpesvirus exploits TOLLIP-mediated selective autophagy to evade host antiviral immunity, highlighting a new interface of interplay between the host and DNA virus.Abbreviations: 3-MA: 3-methyladenine; ACTB: actin beta; AHV-1: anatid herpesvirus 1; ATG7: autophagy related 7; ATG13: autophagy related 13; ATG101: autophagy related 101; BHV-1: bovine alphaherpesvirus 1; BNIP3L/Nix: BCL2 interacting protein 3 like; CALCOCO2/NDP52: calcium binding and coiled-coil domain 2; CCDC50: coiled-coil domain containing 50; CCT2: chaperonin containing TCP1 subunit 2; CGAS: cyclic GMP-AMP synthase; CHV-2: cercopithecine herpesvirus 2; co-IP: co-immunoprecipitation; CQ: chloroquine; CRISPR: clustered regulatory interspaced short palindromic repeat; Cas9: CRISPR-associated system 9; CTD: C-terminal domain; Ctrl: control; DAPI: 4',6-diamidino-2-phenylindole; DBD: N-terminal DNA binding domain; DMSO: dimethyl sulfoxide; DYNLRB1: dynein light chain roadblock-type 1; EHV-1: equine herpesvirus 1; gB: glycoprotein B; GFP: green fluorescent protein; H&E: hematoxylin and eosin; HSV-1: herpes simplex virus 1; HSV-2: herpes simplex virus 2; IB: immunoblotting; IRF3: interferon regulatory factor 3; lenti: lentivirus; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; MARCHF9: membrane associated ring-CH-type finger 9; MG132: cbz-leu-leu-leucinal; NBR1: NBR1 autophagy cargo receptor; NC: negative control; NEDD4L: NEDD4 like E3 ubiquitin protein ligase; NH4Cl: ammonium chloride; OPTN: optineurin; p-: phosphorylated; PFU: plaque-forming unit; Poly(dA:dT): Poly(deoxyadenylic-deoxythymidylic) acid; PPP1: protein phosphatase 1; PRV: pseudorabies virus; RB1CC1/FIP200: RB1 inducible coiled-coil 1; RNF126: ring finger protein 126; RT-PCR: real-time polymerase chain reaction; sgRNA: single guide RNA; siRNA: small interfering RNA; SQSTM1/p62: sequestosome 1; STING1: stimulator of interferon response cGAMP interactor 1; TBK1: TANK binding kinase 1; TOLLIP: toll interacting protein; TRIM33: tripartite motif containing 33; UL16: unique long region 16; UL21: unique long region 21; UL54: unique long region 54; Ub: ubiquitin; UBE3C: ubiquitin protein ligase E3C; ULK1: unc-51 like autophagy activating kinase 1; Vec: vector; VSV: vesicular stomatitis virus; VZV: varicella-zoster virus; WCL: whole-cell lysate; WT: wild-type; Z-VAD: carbobenzoxy-valyl-alanyl-aspartyl-[O-methyl]-fluoromethylketone.
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Affiliation(s)
- Zicheng Ma
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing210095, China
| | - Juan Bai
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing210095, China
| | - Chenlong Jiang
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing210095, China
| | - Huixin Zhu
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing210095, China
| | - Depeng Liu
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing210095, China
| | - Mengjiao Pan
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing210095, China
| | - Xianwei Wang
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing210095, China
| | - Jiang Pi
- Institute of Laboratory Medicine, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, School of Medical Technology, the First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, China
| | - Ping Jiang
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing210095, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China
| | - Xing Liu
- Key Laboratory of Animal Disease Diagnostics and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing210095, China
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Wang S, Li Z, Chen Y, Gao S, Qiao J, Liu H, Song H, Ao D, Sun X. ARIH1 inhibits influenza A virus replication and facilitates RIG-I dependent immune signaling by interacting with SQSTM1/p62. Virol J 2023; 20:58. [PMID: 37005687 PMCID: PMC10066941 DOI: 10.1186/s12985-023-02022-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 03/24/2023] [Indexed: 04/04/2023] Open
Abstract
BACKGROUND Multiple host factors are involved in modulating type I interferon expression induced by viruses; however, the mechanism is not fully elucidated. Influenza A virus infection causes severe respiratory symptoms and triggers a series of signaling cascades and host innate immune responses, including interferon production. The co-IP/MS technology was used to screen several antiviral factors in the early stage. Among these factors, ariadne-1 homolog (ARIH1) caught our attention. METHODS Western blot assay was performed to detect the level of proteins and software ImageJ was used to analyze the band intensities. Polymerase activity assay was conducted to evaluate the polymerase activity of influenza A virus. Tissue culture infective dose (TCID50) assay was performed to measure influenza A virus titers, and quantitative RT-PCR assay was applied to test the mRNA level of IFN-β, ISG56, and CXCL10. Luciferase reporter assay was used to confirm the target of ARIH1 in RIG-I signaling. Immunoprecipitation assay was performed to detect the interaction and the ubiquitination of the proteins. All data were analyzed by biostatistical methods and presented as means ± standard deviation from three independent experiments. Statistical significance was determined using two-tailed student's t test. A P value of less than 0.05 was considered statistically significant, and a P value of less than 0.01 was considered highly significant (ns, P ≥ 0.05; *, P < 0.05; and **, P < 0.01). RESULTS We found that ARIH1, a member of E3 ubiquitin ligases, enhanced cellular antiviral responses. Subsequent study showed that ARIH1 was up-regulated during influenza A virus infection. Further analysis showed that ARIH1 enhanced IFN-β and downstream gene expression by affecting the degradation of RIG-I through the SQSTM1/p62 signaling pathway. CONCLUSION This newly revealed mechanism shows that cellular response increases of ARIH1 and promotes IFN-β expression to boost host survival during viral infection.
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Affiliation(s)
- Shengyu Wang
- Key Laboratory of Infectious Disease and Biosafety, Provincial Department of Education, Guizhou, Institute of Life Sciences/ College of Preclinical Medicine, Zunyi Medical University, Zunyi, China
- Department of Microbiology, College of Preclinical Medicine, Zunyi Medical University, Zunyi, China
| | - Zhenrong Li
- Department of Microbiology, College of Preclinical Medicine, Zunyi Medical University, Zunyi, China
| | - Yaping Chen
- Department of Microbiology, College of Preclinical Medicine, Zunyi Medical University, Zunyi, China
| | - Sanli Gao
- Key Laboratory of Infectious Disease and Biosafety, Provincial Department of Education, Guizhou, Institute of Life Sciences/ College of Preclinical Medicine, Zunyi Medical University, Zunyi, China
- Department of Microbiology, College of Preclinical Medicine, Zunyi Medical University, Zunyi, China
| | - Junhua Qiao
- Department of Microbiology, College of Preclinical Medicine, Zunyi Medical University, Zunyi, China
| | - Haoru Liu
- Department of Microbiology, College of Preclinical Medicine, Zunyi Medical University, Zunyi, China
| | - Hong Song
- Department of Microbiology, College of Preclinical Medicine, Zunyi Medical University, Zunyi, China
| | - Dishu Ao
- Department of Microbiology, College of Preclinical Medicine, Zunyi Medical University, Zunyi, China
| | - Xin Sun
- Key Laboratory of Infectious Disease and Biosafety, Provincial Department of Education, Guizhou, Institute of Life Sciences/ College of Preclinical Medicine, Zunyi Medical University, Zunyi, China.
- Department of Microbiology, College of Preclinical Medicine, Zunyi Medical University, Zunyi, China.
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Ke PY. Crosstalk between Autophagy and RLR Signaling. Cells 2023; 12:cells12060956. [PMID: 36980296 PMCID: PMC10047499 DOI: 10.3390/cells12060956] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/17/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
Autophagy plays a homeostatic role in regulating cellular metabolism by degrading unwanted intracellular materials and acts as a host defense mechanism by eliminating infecting pathogens, such as viruses. Upon viral infection, host cells often activate retinoic acid-inducible gene I (RIG-I)-like receptor (RLR) signaling to induce the transcription of type I interferons, thus establishing the first line of the innate antiviral response. In recent years, numerous studies have shown that virus-mediated autophagy activation may benefit viral replication through different actions on host cellular processes, including the modulation of RLR-mediated innate immunity. Here, an overview of the functional molecules and regulatory mechanism of the RLR antiviral immune response as well as autophagy is presented. Moreover, a summary of the current knowledge on the biological role of autophagy in regulating RLR antiviral signaling is provided. The molecular mechanisms underlying the crosstalk between autophagy and RLR innate immunity are also discussed.
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Affiliation(s)
- Po-Yuan Ke
- Department of Biochemistry & Molecular Biology, Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
- Liver Research Center, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan
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Feline Calicivirus P39 Inhibits Innate Immune Responses by Autophagic Degradation of Retinoic Acid Inducible Gene I. Int J Mol Sci 2023; 24:ijms24065254. [PMID: 36982330 PMCID: PMC10048920 DOI: 10.3390/ijms24065254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 02/25/2023] [Accepted: 03/01/2023] [Indexed: 03/12/2023] Open
Abstract
Feline calicivirus (FCV) is a feline pathogen that can cause severe upper respiratory tract disease in cats, thus posing a major threat to their health. The exact pathogenic mechanism of FCV is still unclear, although it has been identified as having the ability to induce immune depression. In this study, we discovered that FCV infection triggers autophagy and that its non-structural proteins, P30, P32, and P39, are responsible for initiating this process. Additionally, we observed that altering autophagy levels via chemical modulation resulted in different influences on FCV replication. Moreover, our findings indicate that autophagy can modify the innate immunity induced by FCV infection, with increased autophagy further suppressing FCV-induced RIG-I signal transduction. This research provides insights into the mechanism of FCV replication and has the potential to aid in the development of autophagy-targeted drugs to inhibit or prevent FCV infection.
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Chen T, Tu S, Ding L, Jin M, Chen H, Zhou H. The role of autophagy in viral infections. J Biomed Sci 2023; 30:5. [PMID: 36653801 PMCID: PMC9846652 DOI: 10.1186/s12929-023-00899-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/10/2023] [Indexed: 01/20/2023] Open
Abstract
Autophagy is an evolutionarily conserved catabolic cellular process that exerts antiviral functions during a viral invasion. However, co-evolution and co-adaptation between viruses and autophagy have armed viruses with multiple strategies to subvert the autophagic machinery and counteract cellular antiviral responses. Specifically, the host cell quickly initiates the autophagy to degrade virus particles or virus components upon a viral infection, while cooperating with anti-viral interferon response to inhibit the virus replication. Degraded virus-derived antigens can be presented to T lymphocytes to orchestrate the adaptive immune response. Nevertheless, some viruses have evolved the ability to inhibit autophagy in order to evade degradation and immune responses. Others induce autophagy, but then hijack autophagosomes as a replication site, or hijack the secretion autophagy pathway to promote maturation and egress of virus particles, thereby increasing replication and transmission efficiency. Interestingly, different viruses have unique strategies to counteract different types of selective autophagy, such as exploiting autophagy to regulate organelle degradation, metabolic processes, and immune responses. In short, this review focuses on the interaction between autophagy and viruses, explaining how autophagy serves multiple roles in viral infection, with either proviral or antiviral functions.
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Affiliation(s)
- Tong Chen
- grid.35155.370000 0004 1790 4137State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430030 China ,grid.35155.370000 0004 1790 4137Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430030 China
| | - Shaoyu Tu
- grid.35155.370000 0004 1790 4137State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430030 China ,grid.35155.370000 0004 1790 4137Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430030 China
| | - Ling Ding
- grid.35155.370000 0004 1790 4137State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430030 China ,grid.35155.370000 0004 1790 4137Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430030 China
| | - Meilin Jin
- grid.35155.370000 0004 1790 4137State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430030 China ,grid.35155.370000 0004 1790 4137Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430030 China
| | - Huanchun Chen
- grid.35155.370000 0004 1790 4137State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430030 China ,grid.35155.370000 0004 1790 4137Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430030 China
| | - Hongbo Zhou
- grid.35155.370000 0004 1790 4137State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430030 China ,grid.35155.370000 0004 1790 4137Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430030 China
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Zhang K, Huang Q, Peng L, Lin S, Liu J, Zhang J, Li C, Zhai S, Xu Z, Wang S. The multifunctional roles of autophagy in the innate immune response: Implications for regulation of transplantation rejection. Front Cell Dev Biol 2022; 10:1007559. [PMID: 36619861 PMCID: PMC9810636 DOI: 10.3389/fcell.2022.1007559] [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: 07/30/2022] [Accepted: 11/04/2022] [Indexed: 12/24/2022] Open
Abstract
Organ transplantation is the main treatment for end-stage organ failure, which has rescued tens of thousands of lives. Immune rejection is the main factor affecting the survival of transplanted organs. How to suppress immune rejection is an important goal of transplantation research. A graft first triggers innate immune responses, leading to graft inflammation, tissue injury and cell death, followed by adaptive immune activation. At present, the importance of innate immunity in graft rejection is poorly understood. Autophagy, an evolutionarily conserved intracellular degradation system, is proven to be involved in regulating innate immune response following graft transplants. Moreover, there is evidence indicating that autophagy can regulate graft dysfunction. Although the specific mechanism by which autophagy affects graft rejection remains unclear, autophagy is involved in innate immune signal transduction, inflammatory response, and various forms of cell death after organ transplantation. This review summarizes how autophagy regulates these processes and proposes potential targets for alleviating immune rejection.
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Affiliation(s)
- Kunli Zhang
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of Livestock Disease Prevention Guangdong Province, Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, Guangzhou, China
| | - Qiuyan Huang
- State Key Laboratory of Livestock and Poultry Breeding, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Laru Peng
- Guangzhou Laboratory, Guangzhou International BioIsland, Guangzhou, China
| | - Sen Lin
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Jie Liu
- Guangdong Yantang Dairy Co, Ltd, Guangzhou, China
| | - Jianfeng Zhang
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of Livestock Disease Prevention Guangdong Province, Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, Guangzhou, China,Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Maoming, China
| | - Chunling Li
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of Livestock Disease Prevention Guangdong Province, Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, Guangzhou, China
| | - Shaolun Zhai
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of Livestock Disease Prevention Guangdong Province, Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, Guangzhou, China
| | - Zhihong Xu
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of Livestock Disease Prevention Guangdong Province, Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong Province, Ministry of Agriculture and Rural Affairs, Guangzhou, China,*Correspondence: Zhihong Xu, ; Sutian Wang,
| | - Sutian Wang
- State Key Laboratory of Livestock and Poultry Breeding, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China,Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Maoming, China,*Correspondence: Zhihong Xu, ; Sutian Wang,
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26
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Zhang X, Liu J, Wang H. The cGAS-STING-autophagy pathway: Novel perspectives in neurotoxicity induced by manganese exposure. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 315:120412. [PMID: 36240967 DOI: 10.1016/j.envpol.2022.120412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/28/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
Chronic high-level heavy metal exposure increases the risk of developing different neurodegenerative diseases. Chronic excessive manganese (Mn) exposure is known to lead to neurodegenerative diseases. In addition, some evidence suggests that autophagy dysfunction plays an important role in the pathogenesis of various neurodegenerative diseases. Over the past decade, the DNA-sensing receptor cyclic GMP-AMP synthase (cGAS) and its downstream signal-efficient interferon gene stimulator (STING), as well as the molecular composition and regulatory mechanisms of this pathway have been well understood. The cGAS-STING pathway has emerged as a crucial mechanism to induce effective innate immune responses by inducing type I interferons in mammalian cells. Moreover, recent studies have found that Mn2+ is the second activator of the cGAS-STING pathway besides dsDNA, and inducing autophagy is a primitive function for the activation of the cGAS-STING pathway. However, overactivation of the immune response can lead to tissue damage. This review discusses the mechanism of neurotoxicity induced by Mn exposure from the cGAS-STING-autophagy pathway. Future work exploiting the cGAS-STING-autophagy pathway may provide a novel perspective for manganese neurotoxicity.
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Affiliation(s)
- Xin Zhang
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, Gansu, China
| | - Jingjing Liu
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, Gansu, China
| | - Hui Wang
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, Gansu, China.
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27
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Liu J, Ji Q, Cheng F, Chen D, Geng T, Huang Y, Zhang J, He Y, Song T. The lncRNAs involved in regulating the RIG-I signaling pathway. Front Cell Infect Microbiol 2022; 12:1041682. [PMID: 36439216 PMCID: PMC9682092 DOI: 10.3389/fcimb.2022.1041682] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 10/21/2022] [Indexed: 09/23/2023] Open
Abstract
Understanding the targets and interactions of long non-coding RNAs (lncRNAs) related to the retinoic acid-inducible gene-I (RIG-I) signaling pathway is essential for developing interventions, which would enable directing the host inflammatory response regulation toward protective immunity. In the RIG-I signaling pathway, lncRNAs are involved in the important processes of ubiquitination, phosphorylation, and glycolysis, thus promoting the transport of the interferon regulatory factors 3 and 7 (IRF3 and IRF7) and the nuclear factor kappa B (NF-κB) into the nucleus, and activating recruitment of type I interferons (IFN-I) and inflammatory factors to the antiviral action site. In addition, the RIG-I signaling pathway has recently been reported to contain the targets of coronavirus disease-19 (COVID-19)-related lncRNAs. The molecules in the RIG-I signaling pathway are directly regulated by the lncRNA-microRNAs (miRNAs)-messenger RNA (mRNA) axis. Therefore, targeting this axis has become a novel strategy for the diagnosis and treatment of cancer. In this paper, the studies on the regulation of the RIG-I signaling pathway by lncRNAs during viral infections and cancer are comprehensively analyzed. The aim is to provide a solid foundation of information for conducting further detailed studies on lncRNAs and RIG-I in the future and also contribute to clinical drug development.
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Affiliation(s)
- Jing Liu
- Department of Immunology, Zunyi Medical University, Zunyi, China
| | - Qinglu Ji
- School of Pharmacy, Zunyi Medical University, Zunyi, China
| | - Feng Cheng
- Department of Immunology, Zunyi Medical University, Zunyi, China
| | - Dengwang Chen
- Department of Immunology, Zunyi Medical University, Zunyi, China
| | - Tingting Geng
- Department of Immunology, Zunyi Medical University, Zunyi, China
| | - Yueyue Huang
- Department of Immunology, Zunyi Medical University, Zunyi, China
| | - Jidong Zhang
- Department of Immunology, Zunyi Medical University, Zunyi, China
- Collaborative Innovation Center of Tissue Damage Repair and Regeneration Medicine, Zunyi Medical University, Zunyi, China
- Special Key Laboratory of Gene Detection and Therapy of Guizhou Province, Zunyi Medical University, Zunyi, China
| | - Yuqi He
- School of Pharmacy, Zunyi Medical University, Zunyi, China
| | - Tao Song
- Department of Immunology, Zunyi Medical University, Zunyi, China
- Collaborative Innovation Center of Tissue Damage Repair and Regeneration Medicine, Zunyi Medical University, Zunyi, China
- Special Key Laboratory of Gene Detection and Therapy of Guizhou Province, Zunyi Medical University, Zunyi, China
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28
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Pant A, Yao X, Lavedrine A, Viret C, Dockterman J, Chauhan S, Chong-Shan Shi, Manjithaya R, Cadwell K, Kufer TA, Kehrl JH, Coers J, Sibley LD, Faure M, Taylor GA, Chauhan S. Interactions of Autophagy and the Immune System in Health and Diseases. AUTOPHAGY REPORTS 2022; 1:438-515. [PMID: 37425656 PMCID: PMC10327624 DOI: 10.1080/27694127.2022.2119743] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
Autophagy is a highly conserved process that utilizes lysosomes to selectively degrade a variety of intracellular cargo, thus providing quality control over cellular components and maintaining cellular regulatory functions. Autophagy is triggered by multiple stimuli ranging from nutrient starvation to microbial infection. Autophagy extensively shapes and modulates the inflammatory response, the concerted action of immune cells, and secreted mediators aimed to eradicate a microbial infection or to heal sterile tissue damage. Here, we first review how autophagy affects innate immune signaling, cell-autonomous immune defense, and adaptive immunity. Then, we discuss the role of non-canonical autophagy in microbial infections and inflammation. Finally, we review how crosstalk between autophagy and inflammation influences infectious, metabolic, and autoimmune disorders.
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Affiliation(s)
- Aarti Pant
- Autophagy Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
| | - Xiaomin Yao
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University Grossman School of Medicine, New York, New York, United States of America
- Department of Microbiology, New York University Grossman School of Medicine, New York, New York, United States of America
| | - Aude Lavedrine
- CIRI, Centre International de Recherche en Infectiologie, Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Equipe Labellisée par la Fondation pour la Recherche Médicale, FRM
| | - Christophe Viret
- CIRI, Centre International de Recherche en Infectiologie, Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Equipe Labellisée par la Fondation pour la Recherche Médicale, FRM
| | - Jake Dockterman
- Department of Immunology, Duke University, Medical Center, Durham, North Carolina, USA
| | - Swati Chauhan
- Cell biology and Infectious diseases, Institute of Life Sciences, Bhubaneswar, India
| | - Chong-Shan Shi
- Laboratory of Immunoregulation, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Ravi Manjithaya
- Autophagy Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
- Neuroscience Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
| | - Ken Cadwell
- Kimmel Center for Biology and Medicine at the Skirball Institute, New York University Grossman School of Medicine, New York, New York, United States of America
- Department of Microbiology, New York University Grossman School of Medicine, New York, New York, United States of America
- Division of Gastroenterology and Hepatology, Department of Medicine, New York University Grossman School of Medicine, New York, New York, United States of America
| | - Thomas A. Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - John H. Kehrl
- Laboratory of Immunoregulation, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Jörn Coers
- Department of Immunology, Duke University, Medical Center, Durham, North Carolina, USA
- Department of Molecular Genetics and Microbiology, Duke University, Medical Center, Durham, North Carolina, USA
| | - L. David Sibley
- Department of Molecular Microbiology, Washington University Sch. Med., St Louis, MO, 63110, USA
| | - Mathias Faure
- CIRI, Centre International de Recherche en Infectiologie, Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, F-69007, Lyon, France
- Equipe Labellisée par la Fondation pour la Recherche Médicale, FRM
| | - Gregory A Taylor
- Department of Immunology, Duke University, Medical Center, Durham, North Carolina, USA
- Department of Molecular Genetics and Microbiology, Duke University, Medical Center, Durham, North Carolina, USA
- Department of Molecular Microbiology, Washington University Sch. Med., St Louis, MO, 63110, USA
- Geriatric Research, Education, and Clinical Center, VA Health Care Center, Durham, North Carolina, USA
- Departments of Medicine, Division of Geriatrics, and Center for the Study of Aging and Human Development, Duke University, Medical Center, Durham, North Carolina, USA
| | - Santosh Chauhan
- Cell biology and Infectious diseases, Institute of Life Sciences, Bhubaneswar, India
- CSIR–Centre For Cellular And Molecular Biology (CCMB), Hyderabad, Telangana
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29
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NBR1 mediates autophagic degradation of IRF3 to negatively regulate type I interferon production. Biochem Biophys Res Commun 2022; 623:140-147. [DOI: 10.1016/j.bbrc.2022.07.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/11/2022] [Accepted: 07/11/2022] [Indexed: 11/20/2022]
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30
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Di Lorenzo G, Iavarone F, Maddaluno M, Plata-Gómez AB, Aureli S, Quezada Meza CP, Cinque L, Palma A, Reggio A, Cirillo C, Sacco F, Stolz A, Napolitano G, Marin O, Pinna LA, Ruzzene M, Limongelli V, Efeyan A, Grumati P, Settembre C. Phosphorylation of FAM134C by CK2 controls starvation-induced ER-phagy. SCIENCE ADVANCES 2022; 8:eabo1215. [PMID: 36044577 PMCID: PMC9432840 DOI: 10.1126/sciadv.abo1215] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 07/20/2022] [Indexed: 05/28/2023]
Abstract
Selective degradation of the endoplasmic reticulum (ER) via autophagy (ER-phagy) is initiated by ER-phagy receptors, which facilitate the incorporation of ER fragments into autophagosomes. FAM134 reticulon family proteins (FAM134A, FAM134B, and FAM134C) are ER-phagy receptors with structural similarities and nonredundant functions. Whether they respond differentially to the stimulation of ER-phagy is unknown. Here, we describe an activation mechanism unique to FAM134C during starvation. In fed conditions, FAM134C is phosphorylated by casein kinase 2 (CK2) at critical residues flanking the LIR domain. Phosphorylation of these residues negatively affects binding affinity to the autophagy proteins LC3. During starvation, mTORC1 inhibition limits FAM134C phosphorylation by CK2, hence promoting receptor activation and ER-phagy. Using a novel tool to study ER-phagy in vivo and FAM134C knockout mice, we demonstrated the physiological relevance of FAM134C phosphorylation during starvation-induced ER-phagy in liver lipid metabolism. These data provide a mechanistic insight into ER-phagy regulation and an example of autophagy selectivity during starvation.
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Affiliation(s)
| | | | | | - Ana Belén Plata-Gómez
- Metabolism and Cell Signaling Laboratory, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Simone Aureli
- Università della Svizzera italiana (USI), Faculty of Biomedical Sciences, Euler Institute, Lugano, Switzerland
| | | | - Laura Cinque
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
| | - Alessandro Palma
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | - Alessio Reggio
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | - Carmine Cirillo
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | - Francesca Sacco
- Department of Biology, University of Rome “Tor Vergata”, Rome, Italy
| | - Alexandra Stolz
- Institute of Biochemistry II, Faculty of Medicine, Goethe University, Frankfurt am Main, Germany
- Buchmann Institute for Molecular Life Sciences (BMLS), Goethe University, Frankfurt am Main, Germany
| | - Gennaro Napolitano
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
- Department of Translational Medicine, Federico II University, Naples, Italy
| | - Oriano Marin
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Lorenzo A. Pinna
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- CNR Neuroscience Institute, Padova, Italy
| | - Maria Ruzzene
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- CNR Neuroscience Institute, Padova, Italy
| | - Vittorio Limongelli
- Università della Svizzera italiana (USI), Faculty of Biomedical Sciences, Euler Institute, Lugano, Switzerland
- Department of Pharmacy, Federico II University, Naples, Italy
| | - Alejo Efeyan
- Metabolism and Cell Signaling Laboratory, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Paolo Grumati
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
| | - Carmine Settembre
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
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31
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Song J, Li M, Li C, Liu K, Zhu Y, Zhang H. Friend or foe: RIG- I like receptors and diseases. Autoimmun Rev 2022; 21:103161. [PMID: 35926770 PMCID: PMC9343065 DOI: 10.1016/j.autrev.2022.103161] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 07/29/2022] [Indexed: 12/22/2022]
Abstract
Retinoic acid-inducible gene I (RIG-I)-like receptors (RLRs), which are pivotal sensors of RNA virus invasions, mediate the transcriptional induction of genes encoding type I interferons (IFNs) and proinflammatory cytokines, successfully establishing host antiviral immune response. A few excellent reviews have elaborated on the structural biology of RLRs and the antiviral mechanisms of RLR activation. In this review, we give a basic understanding of RLR biology and summarize recent findings of how RLR signaling cascade is strictly controlled by host regulatory mechanisms, which include RLR-interacting proteins, post-translational modifications and microRNAs (miRNAs). Furthermore, we pay particular attention to the relationship between RLRs and diseases, especially how RLRs participate in SARS-CoV-2, malaria or bacterial infections, how single-nucleotide polymorphisms (SNPs) or mutations in RLRs and antibodies against RLRs lead to autoinflammatory diseases and autoimmune diseases, and how RLRs are involved in anti-tumor immunity. These findings will provide insights and guidance for antiviral and immunomodulatory therapies targeting RLRs.
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Affiliation(s)
- Jie Song
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China
| | - Muyuan Li
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha City, Hunan Province, China
| | - Caiyan Li
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China
| | - Ke Liu
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China
| | - Yaxi Zhu
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China.
| | - Huali Zhang
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China.
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32
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Guo D, Xiao J, Liang J, Fan J, Hou P, Li X, Zhang H, Li K, Bu L, Li P, He M, Zhong Y, Guo L, Jia P, Xiao Q, Wu J, Peng H, Li C, Xing F. CDK4/6 inhibition enhances oncolytic virus efficacy by potentiating tumor-selective cell killing and T cell activation in refractory glioblastoma. Cancer Res 2022; 82:3359-3374. [DOI: 10.1158/0008-5472.can-21-3656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 03/29/2022] [Accepted: 07/01/2022] [Indexed: 11/16/2022]
Abstract
Abstract
Glioblastoma multiforme (GBM) is among the most aggressive human cancers. Although oncolytic virus (OV) therapy has been proposed as a potential approach to treat GBM, it frequently fails because GBM cells are usually nonpermissive to OV. Here, we describe a dual-step drug screen for identifying chemical enhancers of oncolytic virus in GBM. From a high-throughput screen of 1416 FDA-approved drugs, an inhibitor of CDK4/6 was identified as the top enhancer, selectively increasing potency of two OV strains, VSVΔ51 and Zika virus. Mechanistically, CDK4/6 inhibition promoted autophagic degradation of MAVS, resulting in impaired antiviral responses and enhanced tumor-selective replication of VSVΔ51 in vitro and in vivo. CDK4/6 inhibition cooperated with VSVΔ51 to induce severe DNA damage stress and amplify oncolysis. In GBM xenograft models, combined treatment with CDK4/6 inhibitor and VSVΔ51 significantly inhibited tumor growth and prolonged the survival of tumor-bearing mice. Further investigation revealed that CDK4/6 inhibitor and VSVΔ51 synergistically induced immunogenic cell death and boosted anti-tumor immunity. Together, this study features a promising approach of treating aggressive GBM through the combination of CDK4/6 inhibitor with OV.
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Affiliation(s)
- Deyin Guo
- Sun Yat-sen University, Guangzhou, China
| | | | | | - Junjie Fan
- Sun Yat-sen University, Guangzhou, China
| | - Panpan Hou
- Sun Yat-sen University, Guangzhou, China
| | - Xiaodong Li
- Guangzhou Medical University, Guangzhou, United States
| | | | - Kai Li
- Sun Yat-sen University, China
| | - Lang Bu
- First Affiliated Hospital of Sun Yat-sen University, guangzhou, guangdong, China
| | - Ping Li
- Sun Yat-sen University, Guangzhou, China
| | - Miao He
- Sun Yat-sen University, Guangzhou, China
| | | | - Liping Guo
- Sun Yat-sen University, Guangzhou, China
| | | | | | - Junyu Wu
- Sun Yat-sen University, Guangzhou, China
| | - Hong Peng
- Sun Yat-sen University, Guangzhou, China
| | - Chunmei Li
- Sun Yat-sen University, Guangzhou, China
| | - Fan Xing
- Sun Yat-sen University, Guangzhou, China
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33
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Wu Z, Hu T, Chen W, Cheng Y, Wang M, Jia R, Zhu D, Liu M, Zhao X, Yang Q, Wu Y, Zhang S, Huang J, Mao S, Ou X, Gao Q, Sun D, Cheng A, Chen S. The autophagy-related degradation of MDA5 by Tembusu virus nonstructural 2B disrupts IFNβ production. FASEB J 2022; 36:e22417. [PMID: 35713934 DOI: 10.1096/fj.202101916rrr] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 05/23/2022] [Accepted: 06/06/2022] [Indexed: 12/24/2022]
Abstract
Duck Tembusu virus (TMUV) is a serious avian pathogen causing a decline in egg production, but the mechanism of the virus that breaks through the innate immune system is poorly understood. Here, we show that TMUV inhibits poly(I:C)-induced interferon (IFN) production. Because poly(I:C) transfection can specifically activate the MDA5 pathway in duck primary cells, we found that infection with TMUV can specifically target MDA5 and lead to its degradation. MDA5 downregulation could be blocked by the autophagy inhibitor 3-methyladenine (3-MA) but not a proteasome inhibitor, strongly implicating MDA5 degradation as an autophagy-related degradation pathway. Pretreatment with 3-MA enhanced the expression of MDA5 and inhibited TMUV replication. To screen TMUV proteins that degraded MDA5, the TMUV replicon and MDA5-Flag were cotransfected into cells, and the western blot analysis showed that nonstructural 2B (NS2B) can degrade MDA5 in a dose-dependent manner. Dual-luciferase assays indicate that NS2B alone inhibits MDA5- or poly(I:C)-mediated IFN production. NS2B binds MDA5 in the presence of 3-MA. The deletion of the amino acids of NS2B from residues 51 to 92 (hydrophilic area) restored the expression of MDA5 and relieved the MDA5-mediated IFNβ production inhibition by NS2B, indicating that the hydrophilic area of NS2B is important for its interaction with host innate immunity.
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Affiliation(s)
- Zhen Wu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Tao Hu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Weiqiong Chen
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yao Cheng
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Mingshu Wang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Renyong Jia
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Dekang Zhu
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Mafeng Liu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Xinxin Zhao
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Qiao Yang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Ying Wu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Shaqiu Zhang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Juan Huang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Sai Mao
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Xumin Ou
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Qun Gao
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Di Sun
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Anchun Cheng
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Shun Chen
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
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Cai X, Zhou Z, Zhu J, Liu X, Ouyang G, Wang J, Li Z, Li X, Zha H, Zhu C, Rong F, Tang J, Liao Q, Chen X, Xiao W. Opposing effects of deubiquitinase OTUD3 in innate immunity against RNA and DNA viruses. Cell Rep 2022; 39:110920. [PMID: 35675783 DOI: 10.1016/j.celrep.2022.110920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 03/29/2022] [Accepted: 05/13/2022] [Indexed: 11/16/2022] Open
Abstract
Retinoic acid-inducible-I (RIG-I), melanoma differentiation-associated gene 5 (MDA5), and cyclic GMP-AMP synthase (cGAS) genes encode essential cytosolic receptors mediating antiviral immunity against viruses. Here, we show that OTUD3 has opposing role in response to RNA and DNA virus infection by removing distinct types of RIG-I/MDA5 and cGAS polyubiquitination. OTUD3 binds to RIG-I and MDA5 and removes K63-linked ubiquitination. This serves to reduce the binding of RIG-I and MDA5 to viral RNA and the downstream adaptor MAVS, leading to the suppression of the RNA virus-triggered innate antiviral responses. Meanwhile, OTUD3 associates with cGAS and targets at Lys279 to deubiquitinate K48-linked ubiquitination, resulting in the enhancement of cGAS protein stability and DNA-binding ability. As a result, Otud3-deficient mice and zebrafish are more resistant to RNA virus infection but are more susceptible to DNA virus infection. These findings demonstrate that OTUD3 limits RNA virus-triggered innate immunity but promotes DNA virus-triggered innate immunity.
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Affiliation(s)
- Xiaolian Cai
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; The Innovation of Seed Design, Chinese Academy of Sciences, Wuhan 430072, P. R. China
| | - Ziwen Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Junji Zhu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xing Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China; The Innovation of Seed Design, Chinese Academy of Sciences, Wuhan 430072, P. R. China
| | - Gang Ouyang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China; The Innovation of Seed Design, Chinese Academy of Sciences, Wuhan 430072, P. R. China
| | - Jing Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China; The Innovation of Seed Design, Chinese Academy of Sciences, Wuhan 430072, P. R. China
| | - Zhi Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiong Li
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Huangyuan Zha
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China
| | - Chunchun Zhu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Fangjing Rong
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jinghua Tang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Qian Liao
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiaoyun Chen
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Wuhan Xiao
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China; The Innovation of Seed Design, Chinese Academy of Sciences, Wuhan 430072, P. R. China; Hubei Hongshan Laboratory, Wuhan 430070, P. R. China.
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35
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Zhou J, Huang Q, Wang L, Li E, Huang W, Xiang Z. Autophagy Protects Ocular Surface Against Overactivated Inflammation by Degrading Retinoic Acid-Induced Gene-I in Human Conjunctival Epithelial Cells. J Ocul Pharmacol Ther 2022; 38:331-338. [PMID: 35613408 DOI: 10.1089/jop.2021.0121] [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: 10/18/2022] Open
Abstract
Purpose: To evaluate the pathological role of autophagy in dry eye diseases by detecting the autophagic degradation of RIG-I, a master RNA-sensing receptor in cells. Methods: RNA-sequencing analysis and qPCR analysis of the expression level of genes related to IFN-I signaling pathway was used to evaluate the inflammatory level of cells overexpressed with RIG-I or empty vector, which was further confirmed by WB analysis. Chemical treatment (3-methyladenine, chloroquine, NH4Cl, rapamycin, torin 1 or trehalose) or gene knockdown was used to modulate autophagy. When the autophagy level was regulated, the autophagic degradation of RIG-I and its pathological role in dry eye diseases were determined by detecting the protein level of RIG-I and the level of cell inflammation. Results: Cells that overexpressed RIG-I showed increased expression of genes involved in the IFN-I signaling pathway compared with cells transfected with an empty vector. Inhibition of autophagy leaded to the accumulation of RIG-I in HCECs, combined with the aggravation of the RIG-I-mediated IFN-I signaling pathway. Contrarily, promoting the autophagic degradation of RIG-I by trehalose treatment could alleviate IFN-I signaling pathway. Conclusions: Autophagy could protect the ocular surface against IFN-I signaling pathway by degrading RIG-I in HCECs. This process may restrict the overactivation of inflammation in the pathological development of dry eye disease.
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Affiliation(s)
- Jie Zhou
- Department of Ophthalmology, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Taizhou, China
| | - Qinzhu Huang
- Department of Ophthalmology, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Taizhou, China
| | - Ledan Wang
- Department of Ophthalmology, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Taizhou, China
| | - Enhui Li
- Department of Ophthalmology, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Taizhou, China
| | - Wenjuan Huang
- Department of Ophthalmology, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Taizhou, China
| | - Zhenyang Xiang
- Department of Ophthalmology, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Taizhou, China
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Lin Y, Li Z, Wang Y, Tian T, Jia P, Ye Y, He M, Yang Z, Li C, Guo D, Hou P. CCDC50 suppresses NLRP3 inflammasome activity by mediating autophagic degradation of NLRP3. EMBO Rep 2022; 23:e54453. [PMID: 35343634 PMCID: PMC9066065 DOI: 10.15252/embr.202154453] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 03/11/2022] [Accepted: 03/11/2022] [Indexed: 12/12/2022] Open
Abstract
The NLRP3-directed inflammasome complex is crucial for the host to resist microbial infection and monitor cellular damage. However, the hyperactivation of NLRP3 inflammasome is implicated in pathogenesis of inflammatory diseases, including inflammatory bowel disease (IBD). Autophagy and autophagy-related genes are closely linked to NLRP3-mediated inflammation in these inflammatory disorders. Here, we report that CCDC50, a novel autophagy cargo receptor, negatively regulates NLRP3 inflammasome assembly and suppresses the cleavage of pro-caspase-1 and interleukin 1β (IL-1β) release by delivering NLRP3 for autophagic degradation. Transcriptome analysis showed that knockdown of CCDC50 results in upregulation of signaling pathways associated with autoinflammatory diseases. CCDC50 deficiency leads to enhanced proinflammatory cytokine response triggered by a wide range of endogenous and exogenous NLRP3 stimuli. Ccdc50-deficient mice are more susceptible to dextran sulfate (DSS)-induced colitis and exhibit more severe gut inflammation with elevated NLRP3 inflammasome activity. These results illustrate the physiological significance of CCDC50 in the pathogenicity of inflammatory diseases, suggesting protective roles of CCDC50 in keeping gut inflammation under control.
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Affiliation(s)
- Yuxin Lin
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Zibo Li
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Yicheng Wang
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Tian Tian
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Penghui Jia
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Yu Ye
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Miao He
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Zixiao Yang
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Chunmei Li
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Deyin Guo
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Panpan Hou
- MOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
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Chan CP, Jin DY. Cytoplasmic RNA sensors and their interplay with RNA-binding partners in innate antiviral response: theme and variations. RNA (NEW YORK, N.Y.) 2022; 28:449-477. [PMID: 35031583 PMCID: PMC8925969 DOI: 10.1261/rna.079016.121] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Sensing of pathogen-associated molecular patterns including viral RNA by innate immunity represents the first line of defense against viral infection. In addition to RIG-I-like receptors and NOD-like receptors, several other RNA sensors are known to mediate innate antiviral response in the cytoplasm. Double-stranded RNA-binding protein PACT interacts with prototypic RNA sensor RIG-I to facilitate its recognition of viral RNA and induction of host interferon response, but variations of this theme are seen when the functions of RNA sensors are modulated by other RNA-binding proteins to impinge on antiviral defense, proinflammatory cytokine production and cell death programs. Their discrete and coordinated actions are crucial to protect the host from infection. In this review, we will focus on cytoplasmic RNA sensors with an emphasis on their interplay with RNA-binding partners. Classical sensors such as RIG-I will be briefly reviewed. More attention will be brought to new insights on how RNA-binding partners of RNA sensors modulate innate RNA sensing and how viruses perturb the functions of RNA-binding partners.
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Affiliation(s)
- Chi-Ping Chan
- School of Biomedical Sciences and State Key Laboratory of Liver Research, Faculty of Medicine Building, Pokfulam, Hong Kong
| | - Dong-Yan Jin
- School of Biomedical Sciences and State Key Laboratory of Liver Research, Faculty of Medicine Building, Pokfulam, Hong Kong
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38
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Transcription of the Envelope Protein by 1-L Protein–RNA Recognition Code Leads to Genes/Proteins That Are Relevant to the SARS-CoV-2 Life Cycle and Pathogenesis. Curr Issues Mol Biol 2022; 44:791-816. [PMID: 35723340 PMCID: PMC8928949 DOI: 10.3390/cimb44020055] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/21/2022] [Accepted: 02/03/2022] [Indexed: 12/02/2022] Open
Abstract
The theoretical protein–RNA recognition code was used in this study to research the compatibility of the SARS-CoV-2 envelope protein (E) with mRNAs in the human transcriptome. According to a review of the literature, the spectrum of identified genes showed that the virus post-transcriptionally promotes or represses the genes involved in the SARS-CoV-2 life cycle. The identified genes/proteins are also involved in adaptive immunity, in the function of the cilia and wound healing (EMT and MET) in the pulmonary epithelial tissue, in Alzheimer’s and Parkinson’s disease and in type 2 diabetes. For example, the E-protein promotes BHLHE40, which switches off the IL-10 inflammatory “brake” and inhibits antiviral THαβ cells. In the viral cycle, E supports the COPII-SCAP-SREBP-HSP90α transport complex by the lowering of cholesterol in the ER and by the repression of insulin signaling, which explains the positive effect of HSP90 inhibitors in COVID-19 (geldanamycin), and E also supports importin α/β-mediated transport to the nucleus, which explains the positive effect of ivermectin, a blocker of importins α/β. In summary, transcription of the envelope protein by the 1-L protein–RNA recognition code leads to genes/proteins that are relevant to the SARS-CoV-2 life cycle and pathogenesis.
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39
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Wu W, Luo X, Ren M. Clearance or Hijack: Universal Interplay Mechanisms Between Viruses and Host Autophagy From Plants to Animals. Front Cell Infect Microbiol 2022; 11:786348. [PMID: 35047417 PMCID: PMC8761674 DOI: 10.3389/fcimb.2021.786348] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 12/10/2021] [Indexed: 12/24/2022] Open
Abstract
Viruses typically hijack the cellular machinery of their hosts for successful infection and replication, while the hosts protect themselves against viral invasion through a variety of defense responses, including autophagy, an evolutionarily ancient catabolic pathway conserved from plants to animals. Double-membrane vesicles called autophagosomes transport trapped viral cargo to lysosomes or vacuoles for degradation. However, during an ongoing evolutionary arms race, viruses have acquired a strong ability to disrupt or even exploit the autophagy machinery of their hosts for successful invasion. In this review, we analyze the universal role of autophagy in antiviral defenses in animals and plants and summarize how viruses evade host immune responses by disrupting and manipulating host autophagy. The review provides novel insights into the role of autophagy in virus–host interactions and offers potential targets for the prevention and control of viral infection in both plants and animals.
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Affiliation(s)
- Wenxian Wu
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu Agricultural Science and Technology Center, Chengdu, China.,Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Science of Zhengzhou University, Zhengzhou, China.,Hainan Yazhou Bay Seed Laboratory, Sanya, China
| | - Xiumei Luo
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu Agricultural Science and Technology Center, Chengdu, China.,Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Science of Zhengzhou University, Zhengzhou, China.,Hainan Yazhou Bay Seed Laboratory, Sanya, China.,Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing, China
| | - Maozhi Ren
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu Agricultural Science and Technology Center, Chengdu, China.,Zhengzhou Research Base, State Key Laboratory of Cotton Biology, School of Agricultural Science of Zhengzhou University, Zhengzhou, China.,Hainan Yazhou Bay Seed Laboratory, Sanya, China
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40
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Lapaquette P, Bizeau JB, Acar N, Bringer MA. Reciprocal interactions between gut microbiota and autophagy. World J Gastroenterol 2021; 27:8283-8301. [PMID: 35068870 PMCID: PMC8717019 DOI: 10.3748/wjg.v27.i48.8283] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 09/09/2021] [Accepted: 12/08/2021] [Indexed: 02/06/2023] Open
Abstract
A symbiotic relationship has set up between the gut microbiota and its host in the course of evolution, forming an interkingdom consortium. The gut offers a favorable ecological niche for microbial communities, with the whole body and external factors (e.g., diet or medications) contributing to modulating this microenvironment. Reciprocally, the gut microbiota is important for maintaining health by acting not only on the gut mucosa but also on other organs. However, failure in one or another of these two partners can lead to the breakdown in their symbiotic equilibrium and contribute to disease onset and/or progression. Several microbial and host processes are devoted to facing up the stress that could alter the symbiosis, ensuring the resilience of the ecosystem. Among these processes, autophagy is a host catabolic process integrating a wide range of stress in order to maintain cell survival and homeostasis. This cytoprotective mechanism, which is ubiquitous and operates at basal level in all tissues, can be rapidly down- or up-regulated at the transcriptional, post-transcriptional, or post-translational levels, to respond to various stress conditions. Because of its sensitivity to all, metabolic-, immune-, and microbial-derived stimuli, autophagy is at the crossroad of the dialogue between changes occurring in the gut microbiota and the host responses. In this review, we first delineate the modulation of host autophagy by the gut microbiota locally in the gut and in peripheral organs. Then, we describe the autophagy-related mechanisms affecting the gut microbiota. We conclude this review with the current challenges and an outlook toward the future interventions aiming at modulating host autophagy by targeting the gut microbiota.
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Affiliation(s)
- Pierre Lapaquette
- UMR PAM A 02.102, University Bourgogne Franche-Comté, Agrosup Dijon, Dijon 21000, France
| | - Jean-Baptiste Bizeau
- Eye and Nutrition Research Group, Centre des Sciences du Goût et de l'Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, Dijon 21000, France
| | - Niyazi Acar
- Eye and Nutrition Research Group, Centre des Sciences du Goût et de l'Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, Dijon 21000, France
| | - Marie-Agnès Bringer
- Eye and Nutrition Research Group, Centre des Sciences du Goût et de l'Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, Dijon 21000, France
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41
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Ke PY. Autophagy and antiviral defense. IUBMB Life 2021; 74:317-338. [PMID: 34859938 DOI: 10.1002/iub.2582] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/04/2021] [Accepted: 11/15/2021] [Indexed: 12/14/2022]
Abstract
Targeting intracellular components for lysosomal degradation by autophagy not only maintains cellular homeostasis but also counteracts the effects of external stimuli, including invading pathogens. Among various kinds of pathogens, viruses have been extensively shown to induce autophagy to benefit viral growth in infected cells and to modulate host defense responses, such as innate antiviral immunity. Recently, numerous lines of evidence have implied that virus-induced autophagy triggers multilayer mechanisms to regulate the innate antiviral response of host cells, thus promoting a balance in virus-host cell interactions. In this review, the detailed mechanisms underlying autophagy and the innate antiviral immune response are first described. Then, I summarize the current information regarding the diverse functional role(s) of autophagy in the control of antiviral defenses against different types of viral infections. Moreover, the physiological significance of autophagy-regulated antiviral responses on the viral life cycle and the potential autophagy alterations induced by virus-associated antiviral signaling is further discussed.
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Affiliation(s)
- Po-Yuan Ke
- Department of Biochemistry & Molecular Biology and Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan, ROC.,Liver Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan, ROC
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42
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Chauhan S, Jena KK, Mehto S, Chauhan NR, Sahu R, Dhar K, Yadav R, Krishna S, Jaiswal P, Chauhan S. Innate immunity and inflammophagy: balancing the defence and immune homeostasis. FEBS J 2021; 289:4112-4131. [PMID: 34826185 DOI: 10.1111/febs.16298] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 10/27/2021] [Accepted: 11/25/2021] [Indexed: 12/15/2022]
Abstract
Extensive crosstalk exists between autophagy and innate immune signalling pathways. The stimuli that induce pattern recognition receptor (PRR)-mediated innate immune signalling pathways, also upregulate autophagy. The purpose of this increased autophagy is to eliminate the stimuli and/or suppress the inflammatory pathways by targeted degradation of PRRs or intermediary proteins (termed 'inflammophagy'). By executing these functions, autophagy dampens excess inflammation triggered by the innate immune signalling pathways. Thus, autophagy helps in the maintenance of the body's innate immune homeostasis to protect from inflammatory and autoimmune diseases. Many autophagy-dependent mechanisms that could control innate immune signalling have been studied over the last few years. However, still, the understanding is incomplete, and studies that are more systematic should be undertaken to delineate the mechanisms of inflammophagy. Here, we discuss the available knowledge of crosstalk between autophagy and PRR signalling pathways.
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Affiliation(s)
- Swati Chauhan
- Epigenetic and Chromatin Biology Unit, Institute of Life Sciences, Bhubaneswar, India
| | - Kautilya Kumar Jena
- Cell Biology and Infectious Diseases Unit, Institute of Life Sciences, Bhubaneswar, Odisha, India.,Cell and Cancer Biology Lab, Institute of Life Sciences, Bhubaneswar, Odisha, India
| | - Subhash Mehto
- Cell Biology and Infectious Diseases Unit, Institute of Life Sciences, Bhubaneswar, Odisha, India.,Cell and Cancer Biology Lab, Institute of Life Sciences, Bhubaneswar, Odisha, India
| | - Nishant Ranjan Chauhan
- Cell Biology and Infectious Diseases Unit, Institute of Life Sciences, Bhubaneswar, Odisha, India.,Cell and Cancer Biology Lab, Institute of Life Sciences, Bhubaneswar, Odisha, India
| | - Rinku Sahu
- Cell Biology and Infectious Diseases Unit, Institute of Life Sciences, Bhubaneswar, Odisha, India.,Cell and Cancer Biology Lab, Institute of Life Sciences, Bhubaneswar, Odisha, India
| | - Kollori Dhar
- Cell Biology and Infectious Diseases Unit, Institute of Life Sciences, Bhubaneswar, Odisha, India.,Cell and Cancer Biology Lab, Institute of Life Sciences, Bhubaneswar, Odisha, India
| | - Rina Yadav
- Cell Biology and Infectious Diseases Unit, Institute of Life Sciences, Bhubaneswar, Odisha, India.,Cell and Cancer Biology Lab, Institute of Life Sciences, Bhubaneswar, Odisha, India
| | - Sivaram Krishna
- Cell Biology and Infectious Diseases Unit, Institute of Life Sciences, Bhubaneswar, Odisha, India.,Cell and Cancer Biology Lab, Institute of Life Sciences, Bhubaneswar, Odisha, India
| | - Pundrik Jaiswal
- Cell Biology and Infectious Diseases Unit, Institute of Life Sciences, Bhubaneswar, Odisha, India.,Cell and Cancer Biology Lab, Institute of Life Sciences, Bhubaneswar, Odisha, India
| | - Santosh Chauhan
- Cell Biology and Infectious Diseases Unit, Institute of Life Sciences, Bhubaneswar, Odisha, India.,Cell and Cancer Biology Lab, Institute of Life Sciences, Bhubaneswar, Odisha, India
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43
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Maluquer de Motes C. Autophagy takes the STING out of DNA sensing. Cell Mol Immunol 2021; 19:125-126. [PMID: 34728794 PMCID: PMC8752732 DOI: 10.1038/s41423-021-00797-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 10/12/2021] [Indexed: 02/06/2023] Open
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44
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Liang S, Wu YS, Li DY, Tang JX, Liu HF. Autophagy in Viral Infection and Pathogenesis. Front Cell Dev Biol 2021; 9:766142. [PMID: 34722550 PMCID: PMC8554085 DOI: 10.3389/fcell.2021.766142] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 09/17/2021] [Indexed: 12/14/2022] Open
Abstract
As an evolutionarily conserved cellular process, autophagy plays an essential role in the cellular metabolism of eukaryotes as well as in viral infection and pathogenesis. Under physiological conditions, autophagy is able to meet cellular energy needs and maintain cellular homeostasis through degrading long-lived cellular proteins and recycling damaged organelles. Upon viral infection, host autophagy could degrade invading viruses and initial innate immune response and facilitate viral antigen presentation, all of which contribute to preventing viral infection and pathogenesis. However, viruses have evolved a variety of strategies during a long evolutionary process, by which they can hijack and subvert host autophagy for their own benefits. In this review, we highlight the function of host autophagy in the key regulatory steps during viral infections and pathogenesis and discuss how the viruses hijack the host autophagy for their life cycle and pathogenesis. Further understanding the function of host autophagy in viral infection and pathogenesis contributes to the development of more specific therapeutic strategies to fight various infectious diseases, such as the coronavirus disease 2019 epidemic.
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Affiliation(s)
- Shan Liang
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Yun-Shan Wu
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Dong-Yi Li
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Ji-Xin Tang
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.,Shunde Women and Children's Hospital, Guangdong Medical University (Foshan Shunde Maternal and Child Healthcare Hospital), Foshan, China
| | - Hua-Feng Liu
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
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Hou P, Lin Y, Li Z, Lu R, Wang Y, Tian T, Jia P, Zhang X, Cao L, Zhou Z, Li C, Gu J, Guo D. Autophagy receptor CCDC50 tunes the STING-mediated interferon response in viral infections and autoimmune diseases. Cell Mol Immunol 2021; 18:2358-2371. [PMID: 34453126 PMCID: PMC8484562 DOI: 10.1038/s41423-021-00758-w] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 08/04/2021] [Indexed: 02/07/2023] Open
Abstract
DNA sensing and timely activation of interferon (IFN)-mediated innate immunity are crucial for the defense against DNA virus infections and the clearance of abnormal cells. However, overactivation of immune responses may lead to tissue damage and autoimmune diseases; therefore, these processes must be intricately regulated. STING is the key adaptor protein, which is activated by cyclic GMP-AMP, the second messenger derived from cGAS-mediated DNA sensing. Here, we report that CCDC50, a newly identified autophagy receptor, tunes STING-directed type I IFN signaling activity by delivering K63-polyubiquitinated STING to autolysosomes for degradation. Knockout of CCDC50 significantly increases herpes simplex virus 1 (HSV-1)- or DNA ligand-induced production of type I IFN and proinflammatory cytokines. Ccdc50-deficient mice show increased production of IFN, decreased viral replication, reduced cell infiltration, and improved survival rates compared with their wild-type littermates when challenged with HSV-1. Remarkably, the expression of CCDC50 is downregulated in systemic lupus erythematosus (SLE), a chronic autoimmune disease. CCDC50 levels are negatively correlated with IFN signaling pathway activation and disease severity in human SLE patients. CCDC50 deficiency potentiates the cGAS-STING-mediated immune response triggered by SLE serum. Thus, our findings reveal the critical role of CCDC50 in the immune regulation of viral infections and autoimmune diseases and provide insights into the therapeutic implications of CCDC50 manipulation.
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Affiliation(s)
- Panpan Hou
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Yuxin Lin
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Zibo Li
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Ruiqing Lu
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Yicheng Wang
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Tian Tian
- grid.239552.a0000 0001 0680 8770The Center for Applied Genomics, Abramson Research Center, The Children’s Hospital of Philadelphia, Philadelphia, PA USA
| | - Penghui Jia
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Xi Zhang
- grid.412558.f0000 0004 1762 1794Division of Rheumatology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Liu Cao
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Zhongwei Zhou
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Chunmei Li
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Jieruo Gu
- grid.412558.f0000 0004 1762 1794Division of Rheumatology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Deyin Guo
- grid.12981.330000 0001 2360 039XMOE Key Laboratory of Tropical Disease Control, Centre for Infection and Immunity Study (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, China
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Yi F, Hu J, Zhu X, Wang Y, Yu Q, Deng J, Huang X, Ma Y, Xie Y. Transcriptional Profiling of Human Peripheral Blood Mononuclear Cells Stimulated by Mycobacterium tuberculosis PPE57 Identifies Characteristic Genes Associated With Type I Interferon Signaling. Front Cell Infect Microbiol 2021; 11:716809. [PMID: 34490145 PMCID: PMC8416891 DOI: 10.3389/fcimb.2021.716809] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 07/30/2021] [Indexed: 02/05/2023] Open
Abstract
Proline-glutamic acid (PE)- and proline-proline-glutamic acid (PPE)-containing proteins are exclusive to Mycobacterium tuberculosis (MTB), the leading cause of tuberculosis (TB). In this study, we performed global transcriptome sequencing (RNA-Seq) on PPE57-stimulated peripheral blood mononuclear cells (PBMCs) and control samples to quantitatively measure the expression level of key transcripts of interest. A total of 1367 differentially expressed genes (DEGs) were observed in response to a 6 h exposure to PPE57, with 685 being up-regulated and 682 down-regulated. Immune-related gene functions and pathways associated with these genes were evaluated, revealing that the type I IFN signaling pathway was the most significantly enriched pathway in our RNA-seq dataset, with 14 DEGs identified therein including ISG15, MX2, IRF9, IFIT3, IFIT2, OAS3, IFIT1, IFI6, OAS2, OASL, RSAD2, OAS1, IRF7, and MX1. These PPE57-related transcriptomic profiles have implications for a better understanding of host global immune mechanisms underlying MTB infection outcomes. However, more studies regarding these DEGs and type I IFN signaling in this infectious context are necessary to more fully clarify the underlying mechanisms that arise in response to PPE57 during MTB infection.
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Affiliation(s)
- Fanli Yi
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Jing Hu
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Xiaoyan Zhu
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yue Wang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Qiuju Yu
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Jing Deng
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Xuedong Huang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Ying Ma
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yi Xie
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
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Endogenous reverse transcriptase and RNase H-mediated antiviral mechanism in embryonic stem cells. Cell Res 2021; 31:998-1010. [PMID: 34158624 PMCID: PMC8217788 DOI: 10.1038/s41422-021-00524-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 05/26/2021] [Indexed: 02/06/2023] Open
Abstract
Nucleic acid-based systems play important roles in antiviral defense, including CRISPR/Cas that adopts RNA-guided DNA cleavage to prevent DNA phage infection and RNA interference (RNAi) that employs RNA-guided RNA cleavage to defend against RNA virus infection. Here, we report a novel type of nucleic acid-based antiviral system that exists in mouse embryonic stem cells (mESCs), which suppresses RNA virus infection by DNA-mediated RNA cleavage. We found that the viral RNA of encephalomyocarditis virus can be reverse transcribed into complementary DNA (vcDNA) by the reverse transcriptase (RTase) encoded by endogenous retrovirus-like elements in mESCs. The vcDNA is negative-sense single-stranded and forms DNA/RNA hybrid with viral RNA. The viral RNA in the heteroduplex is subsequently destroyed by cellular RNase H1, leading to robust suppression of viral growth. Furthermore, either inhibition of the RTase activity or depletion of endogenous RNase H1 results in the promotion of virus proliferation. Altogether, our results provide intriguing insights into the antiviral mechanism of mESCs and the antiviral function of endogenized retroviruses and cellular RNase H. Such a natural nucleic acid-based antiviral mechanism in mESCs is referred to as ERASE (endogenous RTase/RNase H-mediated antiviral system), which is an addition to the previously known nucleic acid-based antiviral mechanisms including CRISPR/Cas in bacteria and RNAi in plants and invertebrates.
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48
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Li D, Wu M. Pattern recognition receptors in health and diseases. Signal Transduct Target Ther 2021; 6:291. [PMID: 34344870 PMCID: PMC8333067 DOI: 10.1038/s41392-021-00687-0] [Citation(s) in RCA: 465] [Impact Index Per Article: 155.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 05/23/2021] [Accepted: 06/22/2021] [Indexed: 02/07/2023] Open
Abstract
Pattern recognition receptors (PRRs) are a class of receptors that can directly recognize the specific molecular structures on the surface of pathogens, apoptotic host cells, and damaged senescent cells. PRRs bridge nonspecific immunity and specific immunity. Through the recognition and binding of ligands, PRRs can produce nonspecific anti-infection, antitumor, and other immunoprotective effects. Most PRRs in the innate immune system of vertebrates can be classified into the following five types based on protein domain homology: Toll-like receptors (TLRs), nucleotide oligomerization domain (NOD)-like receptors (NLRs), retinoic acid-inducible gene-I (RIG-I)-like receptors (RLRs), C-type lectin receptors (CLRs), and absent in melanoma-2 (AIM2)-like receptors (ALRs). PRRs are basically composed of ligand recognition domains, intermediate domains, and effector domains. PRRs recognize and bind their respective ligands and recruit adaptor molecules with the same structure through their effector domains, initiating downstream signaling pathways to exert effects. In recent years, the increased researches on the recognition and binding of PRRs and their ligands have greatly promoted the understanding of different PRRs signaling pathways and provided ideas for the treatment of immune-related diseases and even tumors. This review describes in detail the history, the structural characteristics, ligand recognition mechanism, the signaling pathway, the related disease, new drugs in clinical trials and clinical therapy of different types of PRRs, and discusses the significance of the research on pattern recognition mechanism for the treatment of PRR-related diseases.
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Affiliation(s)
- Danyang Li
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, Hunan, China
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, Hunan, China
| | - Minghua Wu
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, Hunan, China.
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, Hunan, China.
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Liu T, Liu S, Zhou X. Innate Immune Responses and Pulmonary Diseases. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1304:53-71. [PMID: 34019263 DOI: 10.1007/978-3-030-68748-9_4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Innate immunity is the first defense line of the host against various infectious pathogens, environmental insults, and other stimuli causing cell damages. Upon stimulation, pattern recognition receptors (PRRs) act as sensors to activate innate immune responses, containing NF-κB signaling, IFN response, and inflammasome activation. Toll-like receptors (TLRs), retinoic acid-inducible gene I-like receptors (RLRs), NOD-like receptors (NLRs), and other nucleic acid sensors are involved in innate immune responses. The activation of innate immune responses can facilitate the host to eliminate pathogens and maintain tissue homeostasis. However, the activity of innate immune responses needs to be tightly controlled to ensure the optimal intensity and duration of activation under various contexts. Uncontrolled innate immune responses can lead to various disorders associated with aberrant inflammatory response, including pulmonary diseases such as COPD, asthma, and COVID-19. In this chapter, we will have a broad overview of how innate immune responses function and the regulation and activation of innate immune response at molecular levels as well as their contribution to various pulmonary diseases. A better understanding of such association between innate immune responses and pulmonary diseases may provide potential therapeutic strategies.
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Affiliation(s)
- Tao Liu
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Siqi Liu
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Xiaobo Zhou
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
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50
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An unconventional role of an ASB family protein in NF-κB activation and inflammatory response during microbial infection and colitis. Proc Natl Acad Sci U S A 2021; 118:2015416118. [PMID: 33431678 DOI: 10.1073/pnas.2015416118] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Nuclear factor κB (NF-κB)-mediated signaling pathway plays a crucial role in the regulation of inflammatory process, innate and adaptive immune responses. The hyperactivation of inflammatory response causes host cell death, tissue damage, and autoinflammatory disorders, such as sepsis and inflammatory bowel disease. However, how these processes are precisely controlled is still poorly understood. In this study, we demonstrated that ankyrin repeat and suppressor of cytokine signaling box containing 1 (ASB1) is involved in the positive regulation of inflammatory responses by enhancing the stability of TAB2 and its downstream signaling pathways, including NF-κB and mitogen-activated protein kinase pathways. Mechanistically, unlike other members of the ASB family that induce ubiquitination-mediated degradation of their target proteins, ASB1 associates with TAB2 to inhibit K48-linked polyubiquitination and thereby promote the stability of TAB2 upon stimulation of cytokines and lipopolysaccharide (LPS), which indicates that ASB1 plays a noncanonical role to further stabilize the target protein rather than induce its degradation. The deficiency of Asb1 protects mice from Salmonella typhimurium- or LPS-induced septic shock and increases the survival of mice. Moreover, Asb1-deficient mice exhibited less severe colitis and intestinal inflammation induced by dextran sodium sulfate. Given the crucial role of ASB proteins in inflammatory signaling pathways, our study offers insights into the immune regulation in pathogen infection and inflammatory disorders with therapeutic implications.
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