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Maceratessi S, Sampaio NG. hnRNPs in antiviral innate immunity. Immunology 2024; 173:425-441. [PMID: 39111743 DOI: 10.1111/imm.13846] [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: 03/07/2024] [Accepted: 07/25/2024] [Indexed: 10/04/2024] Open
Abstract
During virus infection, many host proteins are redirected from their normal cellular roles to restrict and terminate infection. Heterogeneous nuclear ribonucleoproteins (hnRNPs) are cellular RNA-binding proteins critical to host nucleic acid homeostasis, but can also be involved in the viral infection process, affecting virus replication, assembly and propagation. It has become evident that hnRNPs play important roles in modulation of host innate immunity, which provides critical initial protection against infection. These novel findings can potentially lead to the leveraging of hnRNPs in antiviral therapies. We review hnRNP involvement in antiviral innate immunity, in humans, mice and other animals, and discuss hnRNP targeting as a potential novel antiviral therapeutic.
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Affiliation(s)
- Sofia Maceratessi
- Centro de Virología Humana y Animal (CEVHAN), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Abierta Interamericana (UAI), Buenos Aires, Argentina
| | - Natalia G Sampaio
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, Victoria, Australia
- Department of Molecular and Translational Sciences, School of Clinical Sciences, Monash University, Clayton, Victoria, Australia
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2
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Cheng M, Lu Y, Wang J, Wang H, Sun Y, Zhao W, Wang J, Shi C, Luo J, Gao M, Yu T, Wang J, Guan J, Wang N, Yang W, Jiang Y, Huang H, Yang G, Cao X, Yang D, Wang C, Zeng Y. The E3 ligase ASB3 downregulates antiviral innate immunity by targeting MAVS for ubiquitin-proteasomal degradation. Cell Death Differ 2024:10.1038/s41418-024-01376-5. [PMID: 39266719 DOI: 10.1038/s41418-024-01376-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 08/30/2024] [Accepted: 09/03/2024] [Indexed: 09/14/2024] Open
Abstract
E3 ubiquitin ligases are very important for regulating antiviral immunity during viral infection. Here, we discovered that Ankyrin repeat and SOCS box-containing protein 3 (ASB3), an E3 ligase, are upregulated in the presence of RNA viruses, particularly influenza A virus (IAV). Notably, overexpression of ASB3 inhibits type I IFN (IFN-I) responses induced by Sendai virus (SeV) and IAV, and ablation of ASB3 restores SeV and H9N2 infection-mediated transcription of IFN-β and its downstream interferon-stimulated genes (ISGs). Interestingly, animals lacking ASB3 presented decreased susceptibility to H9N2 and H1N1 infections. Mechanistically, ASB3 interacts with MAVS and directly mediates K48-linked polyubiquitination and degradation of MAVS at K297, thereby inhibiting the phosphorylation of TBK1 and IRF3 and downregulating downstream antiviral signaling. These findings establish ASB3 as a critical negative regulator that controls the activation of antiviral signaling and describe a novel function of ASB3 that has not been previously reported.
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Affiliation(s)
- Mingyang Cheng
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yiyuan Lu
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Jiarui Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Haixu Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yu Sun
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Wenhui Zhao
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Junhong Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Chunwei Shi
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Jiawei Luo
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Ming Gao
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Tianxin Yu
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Jianzhong Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Jiayao Guan
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Nan Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Wentao Yang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yanlong Jiang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Haibin Huang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Guilian Yang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Xin Cao
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China.
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China.
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China.
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China.
| | - Dongqin Yang
- Department of Laboratory Medicine of Huashan Hospital, Fudan University, Shanghai, China.
| | - Chunfeng Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China.
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China.
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China.
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China.
| | - Yan Zeng
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China.
- Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China.
- Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China.
- Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun, China.
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Liu Y, Hou D, Chen W, Lu X, Komaniecki GP, Xu Y, Yu T, Zhang SM, Linder ME, Lin H. MAVS Cys508 palmitoylation promotes its aggregation on the mitochondrial outer membrane and antiviral innate immunity. Proc Natl Acad Sci U S A 2024; 121:e2403392121. [PMID: 39141356 PMCID: PMC11348129 DOI: 10.1073/pnas.2403392121] [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: 02/17/2024] [Accepted: 07/08/2024] [Indexed: 08/15/2024] Open
Abstract
Cysteine palmitoylation or S-palmitoylation catalyzed by the ZDHHC family of acyltransferases regulates the biological function of numerous mammalian proteins as well as viral proteins. However, understanding of the role of S-palmitoylation in antiviral immunity against RNA viruses remains very limited. The adaptor protein MAVS forms functionally essential prion-like aggregates upon activation by viral RNA-sensing RIG-I-like receptors. Here, we identify that MAVS, a C-terminal tail-anchored mitochondrial outer membrane protein, is S-palmitoylated by ZDHHC7 at Cys508, a residue adjacent to the tail-anchor transmembrane helix. Using superresolution microscopy and other biochemical techniques, we found that the mitochondrial localization of MAVS at resting state mainly depends on its transmembrane tail-anchor, without regulation by Cys508 S-palmitoylation. However, upon viral infection, MAVS S-palmitoylation stabilizes its aggregation on the mitochondrial outer membrane and thus promotes subsequent propagation of antiviral signaling. We further show that inhibition of MAVS S-palmitoylation increases the host susceptibility to RNA virus infection, highlighting the importance of S-palmitoylation in the antiviral innate immunity. Also, our results indicate ZDHHC7 as a potential therapeutic target for MAVS-related autoimmune diseases.
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Affiliation(s)
- Yinong Liu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY14853
| | - Dan Hou
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY14853
| | - Wenzhe Chen
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY14853
| | - Xuan Lu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY14853
| | | | - Yilai Xu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY14853
| | - Tao Yu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY14853
| | - Sophia M. Zhang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY14853
| | - Maurine E. Linder
- Department of Molecular Medicine, Cornell University, Ithaca, NY14853
| | - Hening Lin
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY14853
- Howard Hughes Medical Institute, Department of Chemistry and Chemical Biology, Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY14853
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Ouyang A, Chen T, Feng Y, Zou J, Tu S, Jiang M, Sun H, Zhou H. The Hemagglutinin of Influenza A Virus Induces Ferroptosis to Facilitate Viral Replication. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2404365. [PMID: 39159143 DOI: 10.1002/advs.202404365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 07/27/2024] [Indexed: 08/21/2024]
Abstract
Ferroptosis is a novel form of cell death caused by the accumulation of lipid peroxides in an iron-dependent manner. However, the precise mechanism underlying the exploitation of ferroptosis by influenza A viruses (IAV) remains unclear. The results demonstrate that IAV promotes its own replication through ferritinophagy by sensitizing cells to ferroptosis, with hemagglutinin identified as a key trigger in this process. Hemagglutinin interacts with autophagic receptors nuclear receptor coactivator 4 (NCOA4) and tax1-binding protein 1 (TAX1BP1), facilitating the formation of ferritin-NCOA4 condensates and inducing ferritinophagy. Further investigation shows that hemagglutinin-induced ferritinophagy causes cellular lipid peroxidation, inhibits aggregation of mitochondrial antiviral signaling protein (MAVS), and suppresses the type I interferon response, thereby contributing to viral replication. Collectively, a novel mechanism by which IAV hemagglutinin induces ferritinophagy resulting in cellular lipid peroxidation, consequently impairing MAVS-mediated antiviral immunity, is revealed.
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Affiliation(s)
- Aotian Ouyang
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Tong Chen
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Yi Feng
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Jiahui Zou
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Shaoyu Tu
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Meijun Jiang
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Huimin Sun
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Hongbo Zhou
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
- Frontiers Science Center for Animal Breeding and Sustainable Production, Wuhan, Hubei, 430070, China
- Hubei Hongshan Laboratory, Wuhan, Hubei, 430070, China
- Key Laboratory of Preventive Veterinary Medicine in Hubei Province, the Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, 430070, China
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5
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Wei XH, Liao LY, Yin YX, Xu Q, Xie SS, Liu M, Gao LB, Chen HQ, Zhou R. Overexpression of long noncoding RNA DUXAP8 inhibits ER-phagy through activating AKT/mTOR signaling and contributes to preeclampsia. Cell Mol Life Sci 2024; 81:336. [PMID: 39120751 PMCID: PMC11335266 DOI: 10.1007/s00018-024-05385-y] [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: 04/05/2024] [Revised: 07/09/2024] [Accepted: 07/29/2024] [Indexed: 08/10/2024]
Abstract
Preeclampsia (PE) is a life-threatening pregnancy-specific complication with controversial mechanisms and no effective treatment except delivery is available. Currently, increasing researchers suggested that PE shares pathophysiologic features with protein misfolding/aggregation disorders, such as Alzheimer disease (AD). Evidences have proposed defective autophagy as a potential source of protein aggregation in PE. Endoplasmic reticulum-selective autophagy (ER-phagy) plays a critical role in clearing misfolded proteins and maintaining ER homeostasis. However, its roles in the molecular pathology of PE remain unclear. We found that lncRNA DUXAP8 was upregulated in preeclamptic placentae and significantly correlated with clinical indicators. DUXAP8 specifically binds to PCBP2 and inhibits its ubiquitination-mediated degradation, and decreased levels of PCBP2 reversed the activation effect of DUXAP8 overexpression on AKT/mTOR signaling pathway. Function experiments showed that DUXAP8 overexpression inhibited trophoblastic proliferation, migration, and invasion of HTR-8/SVneo and JAR cells. Moreover, pathological accumulation of swollen and lytic ER (endoplasmic reticulum) was observed in DUXAP8-overexpressed HTR8/SVneo cells and PE placental villus trophoblast cells, which suggesting that ER clearance ability is impaired. Further studies found that DUXAP8 overexpression impaired ER-phagy and caused protein aggregation medicated by reduced FAM134B and LC3II expression (key proteins involved in ER-phagy) via activating AKT/mTOR signaling pathway. The increased level of FAM134B significantly reversed the inhibitory effect of DUXAP8 overexpression on the proliferation, migration, and invasion of trophoblasts. In vivo, DUXAP8 overexpression through tail vein injection of adenovirus induced PE-like phenotypes in pregnant rats accompanied with activated AKT/mTOR signaling, decreased expression of FAM134B and LC3-II proteins and increased protein aggregation in placental tissues. Our study reveals the important role of lncRNA DUXAP8 in regulating trophoblast biological behaviors through FAM134B-mediated ER-phagy, providing a new theoretical basis for understanding the pathogenesis of PE.
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Affiliation(s)
- Xiao-Hong Wei
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University) , Ministry of Education, West China Second University Hospital, Sichuan University, NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Ling-Yun Liao
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University) , Ministry of Education, West China Second University Hospital, Sichuan University, NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Yang-Xue Yin
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University) , Ministry of Education, West China Second University Hospital, Sichuan University, NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Qin Xu
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University) , Ministry of Education, West China Second University Hospital, Sichuan University, NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Shuang-Shuang Xie
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University) , Ministry of Education, West China Second University Hospital, Sichuan University, NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Min Liu
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University) , Ministry of Education, West China Second University Hospital, Sichuan University, NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Lin-Bo Gao
- Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, P.R. China
| | - Hong-Qin Chen
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University) , Ministry of Education, West China Second University Hospital, Sichuan University, NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Rong Zhou
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University) , Ministry of Education, West China Second University Hospital, Sichuan University, NHC Key Laboratory of Chronobiology, Sichuan University, Chengdu, Sichuan, P.R. China.
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6
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Zhao S, Li F, Li W, Wang M, Wang Y, Zhang Y, Xia P, Chen J. Mass Spectrometry-Based Proteomic Analysis of Potential Host Proteins Interacting with N in PRRSV-Infected PAMs. Int J Mol Sci 2024; 25:7219. [PMID: 39000325 PMCID: PMC11241482 DOI: 10.3390/ijms25137219] [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: 05/24/2024] [Revised: 06/23/2024] [Accepted: 06/25/2024] [Indexed: 07/16/2024] Open
Abstract
One of the most significant diseases in the swine business, porcine reproductive and respiratory syndrome virus (PRRSV) causes respiratory problems in piglets and reproductive failure in sows. The PRRSV nucleocapsid (N) protein is essential for the virus' assembly, replication, and immune evasion. Stages in the viral replication cycle can be impacted by interactions between the PRRSV nucleocapsid protein and the host protein components. Therefore, it is of great significance to explore the interaction between the PRRSV nucleocapsid protein and the host. Nevertheless, no information has been published on the network of interactions between the nucleocapsid protein and the host proteins in primary porcine alveolar macrophages (PAMs). In this study, 349 host proteins interacting with nucleocapsid protein were screened in the PRRSV-infected PAMs through a liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based proteomics approach. Bioinformatics analysis, which included gene ontology annotation, Kyoto Encyclopedia of Genes and Genomes database enrichment, and a protein-protein interaction (PPI) network, revealed that the host proteins interacting with PRRSV-N may be involved in protein binding, DNA transcription, metabolism, and innate immune responses. This study confirmed the interaction between the nucleocapsid protein and the natural immune-related proteins. Ultimately, our findings suggest that the nucleocapsid protein plays a pivotal role in facilitating immune evasion during a PRRSV infection. This study contributes to enhancing our understanding of the role played by the nucleocapsid protein in viral pathogenesis and virus-host interaction, thereby offering novel insights for the prevention and control of PRRS as well as the development of vaccines.
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Affiliation(s)
- Shijie Zhao
- College of Veterinary Medicine, Henan Agricultural University, Longzi Lake 15#, Zhengzhou 450046, China; (S.Z.); (F.L.); (W.L.); (M.W.); (Y.W.); (Y.Z.)
| | - Fahao Li
- College of Veterinary Medicine, Henan Agricultural University, Longzi Lake 15#, Zhengzhou 450046, China; (S.Z.); (F.L.); (W.L.); (M.W.); (Y.W.); (Y.Z.)
| | - Wen Li
- College of Veterinary Medicine, Henan Agricultural University, Longzi Lake 15#, Zhengzhou 450046, China; (S.Z.); (F.L.); (W.L.); (M.W.); (Y.W.); (Y.Z.)
| | - Mengxiang Wang
- College of Veterinary Medicine, Henan Agricultural University, Longzi Lake 15#, Zhengzhou 450046, China; (S.Z.); (F.L.); (W.L.); (M.W.); (Y.W.); (Y.Z.)
| | - Yueshuai Wang
- College of Veterinary Medicine, Henan Agricultural University, Longzi Lake 15#, Zhengzhou 450046, China; (S.Z.); (F.L.); (W.L.); (M.W.); (Y.W.); (Y.Z.)
| | - Yina Zhang
- College of Veterinary Medicine, Henan Agricultural University, Longzi Lake 15#, Zhengzhou 450046, China; (S.Z.); (F.L.); (W.L.); (M.W.); (Y.W.); (Y.Z.)
| | - Pingan Xia
- College of Veterinary Medicine, Henan Agricultural University, Longzi Lake 15#, Zhengzhou 450046, China; (S.Z.); (F.L.); (W.L.); (M.W.); (Y.W.); (Y.Z.)
| | - Jing Chen
- College of Life Science, Henan Agricultural University, Longzi Lake 15#, Zhengzhou 450046, China
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7
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Wang P, Sun Y, Xu T. USP13 Cooperates with MARCH8 to Inhibit Antiviral Signaling by Targeting MAVS for Autophagic Degradation in Teleost. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 212:801-812. [PMID: 38214605 DOI: 10.4049/jimmunol.2300493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 12/22/2023] [Indexed: 01/13/2024]
Abstract
Mitochondrial antiviral signaling protein (MAVS), as a central adapter protein in retinoic acid-inducible gene I-like receptor signaling, is indispensable for innate antiviral immunity. Yet, the molecular mechanisms modulating the stability of MAVS are not fully understood in low vertebrates. In this study, we report that the deubiquitinase ubiquitin-specific protease 13 (USP13) acts as a negative regulator of antiviral immunity by targeting MAVS for selective autophagic degradation in teleost fish. USP13 is induced by RNA virus or polyinosinic:polycytidylic acid stimulation and acts as a negative regulator to potentiate viral replication in fish cells. Mechanistically, USP13 functions as a scaffold to enhance the interaction between MAVS and the E3 ubiquitin ligase MARCH8, thus promoting MARCH8 to catalyze MAVS through K27-linked polyubiquitination for selective autophagic degradation. Taken together, to our knowledge, our study demonstrates a novel mechanism by which viruses evade host antiviral immunity via USP13 in fish and provides a new idea for mammalian innate antiviral immunity.
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Affiliation(s)
- Pengfei Wang
- Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
| | - Yuena Sun
- Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- National Pathogen Collection Center for Aquatic Animals, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai, China
| | - Tianjun Xu
- Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- Marine Biomedical Science and Technology Innovation Platform of Lin-gang Special Area, Shanghai, China
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8
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Luo B, Jiang Q. Effect of RNA-binding proteins on osteogenic differentiation of bone marrow mesenchymal stem cells. Mol Cell Biochem 2024; 479:383-392. [PMID: 37072640 DOI: 10.1007/s11010-023-04742-y] [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: 03/13/2023] [Accepted: 04/12/2023] [Indexed: 04/20/2023]
Abstract
Tissue regeneration mediated by mesenchymal stem cells (MSCs) is an ideal way to repair bone defects. RNA-binding proteins (RBPs) can affect cell function through post-transcriptional regulation. Exploring the role of RBPs in the process of osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) is helpful to find a key method to promote the osteogenic efficiency of BMSCs. By reviewing the literature, we obtained a differentially expressed mRNA dataset during the osteogenic differentiation of BMSCs and a human RBP dataset. A total of 82 differentially expressed RBPs in the osteogenic differentiation of BMSCs were screened by intersection of the two datasets. Functional analysis showed that the differentially expressed RBPs were mainly involved in RNA transcription, translation and degradation through the formation of spliceosomes and ribonucleoprotein complexes. The top 15 RBPs determined by degree score were FBL, NOP58, DDX10, RPL9, SNRPD3, NCL, IFIH1, RPL18A, NAT10, EXOSC5, ALYREF, PA2G4, EIF5B, SNRPD1 and EIF6. The results of this study demonstrate that the expression of many RBPs changed during osteogenic differentiation of BMSCs.
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Affiliation(s)
- Bin Luo
- Department of Prosthodontics, School of Stomatology, Beijing Stomatological Hospital, Capital Medical University, No. 4 Tiantan Xili, Beijing, 100050, China
| | - Qingsong Jiang
- Department of Prosthodontics, School of Stomatology, Beijing Stomatological Hospital, Capital Medical University, No. 4 Tiantan Xili, Beijing, 100050, China.
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9
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Luan X, Wang L, Song G, Zhou W. Innate immune responses to RNA: sensing and signaling. Front Immunol 2024; 15:1287940. [PMID: 38343534 PMCID: PMC10854198 DOI: 10.3389/fimmu.2024.1287940] [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: 09/04/2023] [Accepted: 01/11/2024] [Indexed: 02/15/2024] Open
Abstract
Nucleic acids are among the most essential PAMPs (pathogen-associated molecular patterns). Animals have evolved numerous sensors to recognize nucleic acids and trigger immune signaling against pathogen replication, cellular stress and cancer. Many sensor proteins (e.g., cGAS, AIM2, and TLR9) recognize the molecular signature of infection or stress and are responsible for the innate immune response to DNA. Remarkably, recent evidence demonstrates that cGAS-like receptors acquire the ability to sense RNA in some forms of life. Compared with the nucleic-acid sensing by cGAS, innate immune responses to RNA are based on various RNA sensors, including RIG-I, MDA5, ADAR1, TLR3/7/8, OAS1, PKR, NLRP1/6, and ZBP1, via a broad-spectrum signaling axis. Importantly, new advances have brought to light the potential clinical application of targeting these signaling pathways. Here, we highlight the latest discoveries in the field. We also summarize the activation and regulatory mechanisms of RNA-sensing signaling. In addition, we discuss how RNA sensing is tightly controlled in cells and why the disruption of immune homeostasis is linked to disease.
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Affiliation(s)
- Xiaohan Luan
- Shenzhen Key Laboratory of Biomolecular Assembling and Regulation, Southern University of Science and Technology, Shenzhen, Guangdong, China
- Department of Immunology and Microbiology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Lei Wang
- Department of Systems Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Guangji Song
- Department of Immunology and Microbiology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Wen Zhou
- Shenzhen Key Laboratory of Biomolecular Assembling and Regulation, Southern University of Science and Technology, Shenzhen, Guangdong, China
- Department of Immunology and Microbiology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
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10
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Rashid MU, Coombs KM. Chloride Intracellular Channel Protein 1 (CLIC1) Is a Critical Host Cellular Factor for Influenza A Virus Replication. Viruses 2024; 16:129. [PMID: 38257829 PMCID: PMC10819074 DOI: 10.3390/v16010129] [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: 11/25/2023] [Revised: 01/10/2024] [Accepted: 01/13/2024] [Indexed: 01/24/2024] Open
Abstract
(1) Background: Influenza A Virus (IAV) uses host cellular proteins during replication in host cells. IAV infection causes elevated expression of chloride intracellular channel protein 1 (CLIC1) in lung epithelial cells, but the importance of this protein in IAV replication is unknown. (2) In this study, we determined the role of CLIC1 in IAV replication by investigating the effects of CLIC1 knockdown (KD) on IAV viral protein translation, genomic RNA transcription, and host cellular proteome dysregulation. (3) Results: CLIC1 KD in A549 human lung epithelial cells resulted in a significant decrease in progeny supernatant IAV, but virus protein expression was unaffected. However, a significantly larger number of viral RNAs accumulated in CLIC1 KD cells. Treatment with a CLIC1 inhibitor also caused a significant reduction in IAV replication, suggesting that CLIC1 is an important host factor in IAV replication. SomaScan®, which measures 1322 proteins, identified IAV-induced dysregulated proteins in wild-type cells and in CLIC1 KD cells. The expression of 116 and 149 proteins was significantly altered in wild-type and in CLIC1 KD cells, respectively. A large number of the dysregulated proteins in CLIC1 KD cells were associated with cellular transcription and predicted to be inhibited during IAV replication. (4) Conclusions: This study suggests that CLIC1 is involved in later stages of IAV replication. Further investigation should clarify mechanism(s) for the development of anti-IAV drugs targeting CLIC1 protein.
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Affiliation(s)
- Mahamud-ur Rashid
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Room 543 Basic Medical Sciences Building, 745 Bannatyne Avenue, Winnipeg, MB R3E OJ9, Canada
- Manitoba Centre for Proteomics and Systems Biology, Room 799, 715 McDermot Avenue, Winnipeg, MB R3E 3P4, Canada
| | - Kevin M. Coombs
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Room 543 Basic Medical Sciences Building, 745 Bannatyne Avenue, Winnipeg, MB R3E OJ9, Canada
- Manitoba Centre for Proteomics and Systems Biology, Room 799, 715 McDermot Avenue, Winnipeg, MB R3E 3P4, Canada
- Children’s Hospital Research Institute of Manitoba, Room 513, John Buhler Research Centre, 715 McDermot Avenue, Winnipeg, MB R3E 3P4, Canada
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11
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Wang Z, Liu N, Yang Y, Tu Z. The novel mechanism facilitating chronic hepatitis B infection: immunometabolism and epigenetic modification reprogramming. Front Immunol 2024; 15:1349867. [PMID: 38288308 PMCID: PMC10822934 DOI: 10.3389/fimmu.2024.1349867] [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: 12/05/2023] [Accepted: 01/02/2024] [Indexed: 01/31/2024] Open
Abstract
Hepatitis B Virus (HBV) infections pose a global public health challenge. Despite extensive research on this disease, the intricate mechanisms underlying persistent HBV infection require further in-depth elucidation. Recent studies have revealed the pivotal roles of immunometabolism and epigenetic reprogramming in chronic HBV infection. Immunometabolism have identified as the process, which link cell metabolic status with innate immunity functions in response to HBV infection, ultimately contributing to the immune system's inability to resolve Chronic Hepatitis B (CHB). Within hepatocytes, HBV replication leads to a stable viral covalently closed circular DNA (cccDNA) minichromosome located in the nucleus, and epigenetic modifications in cccDNA enable persistence of infection. Additionally, the accumulation or depletion of metabolites not only directly affects the function and homeostasis of immune cells but also serves as a substrate for regulating epigenetic modifications, subsequently influencing the expression of antiviral immune genes and facilitating the occurrence of sustained HBV infection. The interaction between immunometabolism and epigenetic modifications has led to a new research field, known as metabolic epigenomics, which may form a mutually reinforcing relationship with CHB. Herein, we review the recent studies on immunometabolism and epigenetic reprogramming in CHB infection and discuss the potential mechanisms of persistent HBV infection. A deeper understanding of these mechanisms will offer novel insights and targets for intervention strategies against chronic HBV infection, thereby providing new hope for the treatment of related diseases.
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Affiliation(s)
- Zhengmin Wang
- Department of Hepatology, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Nan Liu
- Institute of Epigenetic Medicine, First Hospital of Jilin University, Changchun, China
| | - Yang Yang
- Department of Hepatology, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Zhengkun Tu
- Department of Hepatology, The First Hospital of Jilin University, Changchun, Jilin, China
- Institute of Liver Diseases, The First Hospital of Jilin University, Changchun, Jilin, China
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12
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Jiang W, Li M, Peng S, Hu T, Long Y, Zhang J, Peng D, Shen Y. Ubiquitin ligase enzymes and de-ubiquitinating enzymes regulate innate immunity in the TLR, NLR, RLR, and cGAS-STING pathways. Immunol Res 2023; 71:800-813. [PMID: 37291329 DOI: 10.1007/s12026-023-09400-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 06/01/2023] [Indexed: 06/10/2023]
Abstract
Ubiquitination (or ubiquitylation) and de-ubiquitination, which are both post-translational modifications (PTMs) of proteins, have become a research hotspot in recent years. Some ubiquitinated or de-ubiquitinated signaling proteins have been found to promote or suppress innate immunity through Toll-like receptor (TLR), RIG-like receptor (RIG-I-like receptor, RLR), NOD-like receptor (NLR), and the cyclic guanosine monophosphate (GMP)-adenosine monophosphate (AMP) synthase (cGAS)-STING pathway. This article aimed to provide a review on the role of ubiquitination and de-ubiquitination, especially ubiquitin ligase enzymes and de-ubiquitinating enzymes, in the above four pathways. We hope that our work can contribute to the research and development of treatment strategies for innate immunity-related diseases such as inflammatory bowel disease.
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Affiliation(s)
- Wang Jiang
- Department of Digestive Diseases, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, 161 Shaoshan Road, Changsha City, 410000, People's Republic of China
| | - Mengling Li
- Department of Digestive Diseases, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, 161 Shaoshan Road, Changsha City, 410000, People's Republic of China
| | - Siyuan Peng
- Department of Digestive Diseases, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, 161 Shaoshan Road, Changsha City, 410000, People's Republic of China
| | - Tian Hu
- Department of Digestive Diseases, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, 161 Shaoshan Road, Changsha City, 410000, People's Republic of China
| | - Yan Long
- Department of Digestive Diseases, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, 161 Shaoshan Road, Changsha City, 410000, People's Republic of China
| | - Jiayi Zhang
- Department of Digestive Diseases, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, 161 Shaoshan Road, Changsha City, 410000, People's Republic of China
| | - Dan Peng
- Department of Digestive Diseases, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, 161 Shaoshan Road, Changsha City, 410000, People's Republic of China
| | - Yueming Shen
- Department of Digestive Diseases, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, 161 Shaoshan Road, Changsha City, 410000, People's Republic of China.
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13
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Wang L, Song Y, Yan X, Xu T. A novel protein encoded by circVPS13D attenuates antiviral innate immunity by targeting MAVS in teleost fish. J Virol 2023; 97:e0088623. [PMID: 37843373 PMCID: PMC10688384 DOI: 10.1128/jvi.00886-23] [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: 06/12/2023] [Accepted: 09/06/2023] [Indexed: 10/17/2023] Open
Abstract
IMPORTANCE The expression of circVPS13D was upregulated with SCRV invasion, which proved that circVPS13D was involved in the regulation of the antiviral immune response. Our study revealed that the existence of circVPS13D promoted the replication of SCRV. Functionally, circVPS13D negatively regulates the antiviral responses of fish. Mechanistically, we confirmed that circVPS13D inhibited RLRs antiviral signaling pathway via the encoded protein VPS13D-170aa by targeting MAVS. Our study provided novel insights into the roles of protein-coding circRNAs and supported VPS13D-170aa as a negative regulator in the antiviral immune responses of teleost fish.
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Affiliation(s)
- Linchao Wang
- Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
| | - Yanhong Song
- Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
| | - Xiaolong Yan
- Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
| | - Tianjun Xu
- Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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14
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Lu LF, Li ZC, Zhang C, Chen DD, Han KJ, Zhou XY, Wang XL, Li XY, Zhou L, Li S. Zebrafish TMEM47 is an effective blocker of IFN production during RNA and DNA virus infection. J Virol 2023; 97:e0143423. [PMID: 37882518 PMCID: PMC10688382 DOI: 10.1128/jvi.01434-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 09/25/2023] [Indexed: 10/27/2023] Open
Abstract
IMPORTANCE Mitochondrial antiviral signaling protein (MAVS) and stimulator of interferon (IFN) genes (STING) are key adaptor proteins required for innate immune responses to RNA and DNA virus infection. Here, we show that zebrafish transmembrane protein 47 (TMEM47) plays a critical role in regulating MAVS- and STING-triggered IFN production in a negative feedback manner. TMEM47 interacted with MAVS and STING for autophagic degradation, and ATG5 was essential for this process. These findings suggest the inhibitory function of TMEM47 on MAVS- and STING-mediated signaling responses during RNA and DNA virus infection.
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Affiliation(s)
- Long-Feng Lu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Zhuo-Cong Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Can Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Dan-Dan Chen
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ke-Jia Han
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Xiao-Yu Zhou
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xue-Li Wang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Xi-Yin Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Freshwater Ecology and Biotechnology, The Key Laboratory of Breeding Biotechnology and Sustainable Aquaculture, Hubei Hongshan Laboratory, the Innovation Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China
| | - Li Zhou
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Freshwater Ecology and Biotechnology, The Key Laboratory of Breeding Biotechnology and Sustainable Aquaculture, Hubei Hongshan Laboratory, the Innovation Academy of Seed Design, Chinese Academy of Sciences, Wuhan, China
| | - Shun Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
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15
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Wu M, Pei Z, Long G, Chen H, Jia Z, Xia W. Mitochondrial antiviral signaling protein: a potential therapeutic target in renal disease. Front Immunol 2023; 14:1266461. [PMID: 37901251 PMCID: PMC10602740 DOI: 10.3389/fimmu.2023.1266461] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 09/26/2023] [Indexed: 10/31/2023] Open
Abstract
Mitochondrial antiviral signaling protein (MAVS) is a key innate immune adaptor on the outer mitochondrial membrane that acts as a switch in the immune signal transduction response to viral infections. Some studies have reported that MAVS mediates NF-κB and type I interferon signaling during viral infection and is also required for optimal NLRP3 inflammasome activity. Recent studies have reported that MAVS is involved in various cancers, systemic lupus erythematosus, kidney diseases, and cardiovascular diseases. Herein, we summarize the structure, activation, pathophysiological roles, and MAVS-based therapies for renal diseases. This review provides novel insights into MAVS's role and therapeutic potential in the pathogenesis of renal diseases.
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Affiliation(s)
- Meng Wu
- Department of Clinical Laboratory, Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Zhiyin Pei
- Department of Clinical Laboratory, Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Guangfeng Long
- Department of Clinical Laboratory, Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Hongbing Chen
- Department of Clinical Laboratory, Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Zhanjun Jia
- Department of Nephrology, Children’s Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Key Laboratory of Pediatrics, Nanjing Medical University, Nanjing, China
| | - Weiwei Xia
- Department of Clinical Laboratory, Children’s Hospital of Nanjing Medical University, Nanjing, China
- Department of Nephrology, Children’s Hospital of Nanjing Medical University, Nanjing, China
- Jiangsu Key Laboratory of Pediatrics, Nanjing Medical University, Nanjing, China
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16
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Lee EY, Hwang J, Kim MH. Phosphocode-dependent glutamyl-prolyl-tRNA synthetase 1 signaling in immunity, metabolism, and disease. Exp Mol Med 2023; 55:2116-2126. [PMID: 37779151 PMCID: PMC10618286 DOI: 10.1038/s12276-023-01094-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 07/10/2023] [Accepted: 07/11/2023] [Indexed: 10/03/2023] Open
Abstract
Ubiquitously expressed aminoacyl-tRNA synthetases play essential roles in decoding genetic information required for protein synthesis in every living species. Growing evidence suggests that they also function as crossover mediators of multiple biological processes required for homeostasis. In humans, eight cytoplasmic tRNA synthetases form a central machinery called the multi-tRNA synthetase complex (MSC). The formation of MSCs appears to be essential for life, although the role of MSCs remains unclear. Glutamyl-prolyl-tRNA synthetase 1 (EPRS1) is the most evolutionarily derived component within the MSC that plays a critical role in immunity and metabolism (beyond its catalytic role in translation) via stimulus-dependent phosphorylation events. This review focuses on the role of EPRS1 signaling in inflammation resolution and metabolic modulation. The involvement of EPRS1 in diseases such as cancer is also discussed.
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Affiliation(s)
- Eun-Young Lee
- Microbiome Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Korea
| | - Jungwon Hwang
- Microbiome Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Korea
| | - Myung Hee Kim
- Microbiome Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Korea.
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17
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Lo R, Gonçalves-Carneiro D. Sensing nucleotide composition in virus RNA. Biosci Rep 2023; 43:BSR20230372. [PMID: 37606964 PMCID: PMC10500230 DOI: 10.1042/bsr20230372] [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: 06/13/2023] [Revised: 08/10/2023] [Accepted: 08/22/2023] [Indexed: 08/23/2023] Open
Abstract
Nucleotide composition plays a crucial role in the structure, function and recognition of RNA molecules. During infection, virus RNA is exposed to multiple endogenous proteins that detect local or global compositional biases and interfere with virus replication. Recent advancements in RNA:protein mapping technologies have enabled the identification of general RNA-binding preferences in the human proteome at basal level and in the context of virus infection. In this review, we explore how cellular proteins recognise nucleotide composition in virus RNA and the impact these interactions have on virus replication. Protein-binding G-rich and C-rich sequences are common examples of how host factors detect and limit infection, and, in contrast, viruses may have evolved to purge their genomes from such motifs. We also give examples of how human RNA-binding proteins inhibit virus replication, not only by destabilising virus RNA, but also by interfering with viral protein translation and genome encapsidation. Understanding the interplay between cellular proteins and virus RNA composition can provide insights into host-virus interactions and uncover potential targets for antiviral strategies.
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Affiliation(s)
- Raymon Lo
- Imperial College London, Department of Infectious Disease, Imperial College London, London, U.K
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18
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Su R, Yin J, Ruan X, Chen Y, Wan P, Luo Z. Featured interactome of homocysteine-inducible endoplasmic reticulum protein uncovers novel binding partners in response to ER stress. Comput Struct Biotechnol J 2023; 21:4478-4487. [PMID: 37736299 PMCID: PMC10510068 DOI: 10.1016/j.csbj.2023.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/23/2023] Open
Abstract
Homocysteine-inducible endoplasmic reticulum protein (HERP) is an endoplasmic reticulum (ER)-resident protein and important for the adaptation of cellular protein homeostasis by ER-associated degradation (ERAD) system. HERP interactors are critical for cellular viability and the reaction to ER stress. To explore the exact mechanisms by which HERP performed the biological functions, we conducted an interaction analysis of HERP protein in HeLa cells by co-immunoprecipitation (Co-IP) and liquid chromatography-mass spectrometer (LC-MS)/MS coupled with label-free quantification (LFQ). Among the interactome results, 123 proteins significantly interacted with HERP, which leads to numerous biological processes including protein import into nucleus, ubiquitin-dependent ERAD pathway, negative regulation of apoptotic process, and protein transport from ER, along with multiple pathways including several diseases, protein processing in ER, fatty acid metabolism, and steroid biosynthesis. Furthermore, we selected several prey proteins from the interactome data and confirmed that HERP interacted with ancient ubiquitous protein 1 (AUP1), Fas-associated factor family member 2 (FAF2), tripartite motif containing 47 (TRIM47), acyl-CoA synthetase long-chain family member 3 (ACSL3), sequestosome 1 (SQSTM1), and poly(rC) binding protein 2 (PCBP2) by Co-IP and confocal microscopy experiments, respectively. Moreover, the expression and location of several interacted proteins were obviously altered in response to ER stress induced by Thapsigargin stimulation and Enterovirus 71 infection. In conclusion, our findings revealed that the vital proteins interacted with HERP to mediate signaling transduction, thus providing novel clues for the mechanisms of HERP associated with ERAD and metabolism in response to ER stress under physiological and pathological conditions.
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Affiliation(s)
- Rui Su
- Henan Key Laboratory of Immunology and Targeted Drug, Xinxiang Medical University, Xinxiang 453003, China
- Department of Immunology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China
| | - Jialing Yin
- Institute of Medical Microbiology, Jinan University, Guangzhou 510632, China
| | - Xiaolan Ruan
- Institute of Medical Microbiology, Jinan University, Guangzhou 510632, China
| | - Yanxi Chen
- Institute of Medical Microbiology, Jinan University, Guangzhou 510632, China
| | - Pin Wan
- Wuhan Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430072, China
- Foshan Institute of Medical Microbiology, Foshan 528315, China
| | - Zhen Luo
- Institute of Medical Microbiology, Jinan University, Guangzhou 510632, China
- Foshan Institute of Medical Microbiology, Foshan 528315, China
- Key Laboratory of Viral Pathogenesis & Infection Prevention and Control (Jinan University), Ministry of Education, Guangzhou 510632, China
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19
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Li WX, Wang XH, Lin YJ, Zhou YY, Li J, Zhang XY, Chen XH. Large yellow croaker ( Larimichthys crocea) mitofusin 2 inhibits type I IFN responses by degrading MAVS via enhanced K48-linked ubiquitination. MARINE LIFE SCIENCE & TECHNOLOGY 2023; 5:359-372. [PMID: 37637256 PMCID: PMC10449736 DOI: 10.1007/s42995-023-00189-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 07/21/2023] [Indexed: 08/29/2023]
Abstract
In mammals, mitofusin 2 (MFN2) is involved in mitochondrial fusion, and suppresses the virus-induced RIG-I-like receptor (RLR) signaling pathway. However, little is known about the function of MFN2 in non-mammalian species. In the present study, we cloned an MFN2 ortholog (LcMFN2) in large yellow croaker (Larimichthys crocea). Phylogenetic analysis showed that MFN2 emerged after the divergence of amphioxus and vertebrates. The protein sequences of MFN2 were well conserved from fish to mammals. LcMFN2 was expressed in all the tissues/organs examined at different levels, and its expression was upregulated in response to poly(I:C) stimulation. Overexpression of LcMFN2 inhibited MAVS-induced type I interferon (IFN) promoter activation and antiviral gene expression. In contrast, knockdown of endogenous LcMFN2 enhanced poly(I:C) induced production of type I IFNs. Additionally, LcMFN2 enhanced K48-linked polyubiquitination of MAVS, promoting its degradation. Also, overexpression of LcMFN2 impaired the cellular antiviral response, as evidenced by the increased expression of viral genes and more severe cytopathic effects (CPE) in cells infected with spring viremia of carp virus (SVCV). These results indicated that LcMFN2 inhibited type I IFN response by degrading MAVS, suggesting its negative regulatory role in cellular antiviral response. Therefore, our study sheds a new light on the regulatory mechanisms of the cellular antiviral response in teleosts. Supplementary Information The online version contains supplementary material available at 10.1007/s42995-023-00189-8.
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Affiliation(s)
- Wen-Xing Li
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Life Sciences, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Xiao-Hong Wang
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Life Sciences, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Yi-Jun Lin
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Life Sciences, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Yuan-Yuan Zhou
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Life Sciences, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Jun Li
- School of Science and Medicine, Lake Superior State University, Sault Ste. Marie, MI 49783 USA
| | - Xiang-Yang Zhang
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Life Sciences, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Xin-Hua Chen
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Life Sciences, College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519000 China
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20
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Zhang R, Yang W, Zhu H, Zhai J, Xue M, Zheng C. NLRC4 promotes the cGAS-STING signaling pathway by facilitating CBL-mediated K63-linked polyubiquitination of TBK1. J Med Virol 2023; 95:e29013. [PMID: 37537877 DOI: 10.1002/jmv.29013] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/28/2023] [Accepted: 07/20/2023] [Indexed: 08/05/2023]
Abstract
TANK-binding kinase 1 (TBK1) is crucial in producing type Ⅰ interferons (IFN-Ⅰ) that play critical functions in antiviral innate immunity. The tight regulation of TBK1, especially its activation, is very important. Here we identify NLRC4 as a positive regulator of TBK1. Ectopic expression of NLRC4 facilitates the activation of the IFN-β promoter, the mRNA levels of IFN-β, ISG54, and ISG56, and the nuclear translocation of interferon regulatory factor 3 induced by cGAS and STING. Consistently, under herpes simplex virus-1 (HSV-1) infection, knockdown or knockout of NLRC4 in BJ cells and primary peritoneal macrophages from Nlrc4-deficient (Nlrc4-/- ) mice show attenuated Ifn-β, Isg54, and Isg56 mRNA transcription, TBK1 phosphorylation, and augmented viral replications. Moreover, Nlrc4-/- mice show higher mortality upon HSV-1 infection. Mechanistically, NLRC4 facilitates the interaction between TBK1 and the E3 ubiquitin ligase CBL to enhance the K63-linked polyubiquitination of TBK1. Our study elucidates a previously uncharacterized function for NLRC4 in upregulating the cGAS-STING signaling pathway and antiviral innate immunity.
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Affiliation(s)
- Rongzhao Zhang
- Department of Immunology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Wenxian Yang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Huifang Zhu
- Neonatal/Pediatric Intensive Care Unit, Children's Medical Center, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Jingbo Zhai
- Key Laboratory of Zoonose Prevention and Control at Universities of Inner Mongolia Autonomous Region, Medical College, Inner Mongolia Minzu University, Tongliao, China
| | - Mengzhou Xue
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Chunfu Zheng
- Department of Immunology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
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21
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Li X, Wang Y, Min Q, Zhang W, Teng H, Li C, Zhang K, Shi L, Wang B, Zhan Q. Comparative transcriptome characterization of esophageal squamous cell carcinoma and adenocarcinoma. Comput Struct Biotechnol J 2023; 21:3841-3853. [PMID: 37564101 PMCID: PMC10410469 DOI: 10.1016/j.csbj.2023.07.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 07/20/2023] [Accepted: 07/22/2023] [Indexed: 08/12/2023] Open
Abstract
Background Esophageal cancers are primarily categorized as esophageal squamous cell carcinoma (ESCC) and esophageal adenocarcinoma (EAC). While various (epi) genomic alterations associated with tumor development in ESCC and EAC have been documented, a comprehensive comparison of the transcriptomes in these two cancer subtypes remains lacking. Methods We collected 551 gene expression profiles from publicly available sources, including normal, ESCC, and EAC tissues or cell lines. Subsequently, we conducted a systematic analysis to compare the transcriptomes of these samples at various levels, including gene expression, promoter activity, alternative splicing (AS), alternative polyadenylation (APA), and gene fusion. Results Seven distinct cluster gene expression patterns were identified among the differentially expressed genes in normal, ESCC, and EAC tissues. These patterns were enriched in the PI3K-Akt signaling pathway and the activation of extracellular matrix organization and exhibited repression of epidermal development. Notably, we observed additional genes or unique expression levels enriched in these shared pathways and biological processes related to tumor development and immune activation. In addition to the differentially expressed genes, there was an enrichment of lncRNA co-expression networks and downregulation of promoter activity associated with the repression of epidermal development in both ESCC and EAC. This indicates a common feature between these two cancer subtypes. Furthermore, differential AS and APA patterns in ESCC and EAC appear to partially affect the expression of host genes associated with bacterial or viral infections in these subtypes. No gene fusions were observed between ESCC and EAC, thus highlighting the distinct molecular mechanisms underlying these two cancer subtypes. Conclusions We conducted a comprehensive comparison of ESCC and EAC transcriptomes and uncovered shared and distinct transcriptomic signatures at multiple levels. These findings suggest that ESCC and EAC may exhibit common and unique mechanisms involved in tumorigenesis.
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Affiliation(s)
- Xianfeng Li
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Laboratory of Molecular Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
- Department of Gastroenterology and Chongqing Key Laboratory of Digestive Malignancies, Daping Hospital, Army Medical University (Third Military Medical University), 10# Changjiang Branch Road, Yuzhong District, Chongqing 400042, People's Republic of China
- Institute of Pathology and Southwest Cancer Center, Key Laboratory of Tumor Immunopathology of Ministry of Education of China, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, People's Republic of China
- Jinfeng Laboratory, Chongqing 401329, People's Republic of China
| | - Yan Wang
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Laboratory of Molecular Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Qingjie Min
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Laboratory of Molecular Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Weimin Zhang
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Laboratory of Molecular Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Huajing Teng
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Radiation Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Chao Li
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou 325035, China
| | - Kun Zhang
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou 325035, China
| | - Leisheng Shi
- Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, China
| | - Bin Wang
- Department of Gastroenterology and Chongqing Key Laboratory of Digestive Malignancies, Daping Hospital, Army Medical University (Third Military Medical University), 10# Changjiang Branch Road, Yuzhong District, Chongqing 400042, People's Republic of China
- Institute of Pathology and Southwest Cancer Center, Key Laboratory of Tumor Immunopathology of Ministry of Education of China, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, People's Republic of China
- Jinfeng Laboratory, Chongqing 401329, People's Republic of China
| | - Qimin Zhan
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Laboratory of Molecular Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
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22
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Zheng J, Shi W, Yang Z, Chen J, Qi A, Yang Y, Deng Y, Yang D, Song N, Song B, Luo D. RIG-I-like receptors: Molecular mechanism of activation and signaling. Adv Immunol 2023; 158:1-74. [PMID: 37453753 DOI: 10.1016/bs.ai.2023.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
During RNA viral infection, RIG-I-like receptors (RLRs) recognize the intracellular pathogenic RNA species derived from viral replication and activate antiviral innate immune response by stimulating type 1 interferon expression. Three RLR members, namely, RIG-I, MDA5, and LGP2 are homologous and belong to a subgroup of superfamily 2 Helicase/ATPase that is preferably activated by double-stranded RNA. RLRs are significantly different in gene architecture, RNA ligand preference, activation, and molecular functions. As switchable macromolecular sensors, RLRs' activities are tightly regulated by RNA ligands, ATP, posttranslational modifications, and cellular cofactors. We provide a comprehensive review of the structure and function of the RLRs and summarize the molecular understanding of sensing and signaling events during the RLR activation process. The key roles RLR signaling play in both anti-infection and immune disease conditions highlight the therapeutic potential in targeting this important molecular pathway.
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Affiliation(s)
- Jie Zheng
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, China; Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
| | - Wenjia Shi
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Ziqun Yang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Jin Chen
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Ao Qi
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, China; Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Yulin Yang
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, China; Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Ying Deng
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Dongyuan Yang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Ning Song
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Bin Song
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Dahai Luo
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore; NTU Institute of Structural Biology, Nanyang Technological University, Singapore, Singapore.
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23
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Chen YY, Ran XH, Ni RZ, Mu D. TRIM28 negatively regulates the RLR signaling pathway by targeting MAVS for degradation via K48-linked polyubiquitination. J Biol Chem 2023; 299:104660. [PMID: 37119745 PMCID: PMC10165269 DOI: 10.1016/j.jbc.2023.104660] [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: 01/21/2023] [Revised: 03/14/2023] [Accepted: 03/18/2023] [Indexed: 05/01/2023] Open
Abstract
Mitochondrial antiviral signaling (MAVS) protein is a core signaling adapter in the retinoid acid-inducible gene-I-like receptor (RLR) signaling pathway that recruits downstream signaling factors, ultimately leading to the activation of type Ⅰ interferons. However, the mechanisms that modulate the RLR signaling pathway by manipulating MAVS are not fully understood. Previous studies suggested that tripartite motif 28 (TRIM28) participates in regulating innate immune signaling pathways by inhibiting the expression of immune-related genes at the transcriptional level. In this study, we characterized TRIM28 as a negative regulator of the RLR signaling pathway in a MAVS-dependent manner. Overexpression of TRIM28 inhibited the MAVS-induced production of type Ⅰ interferons and proinflammatory cytokines, while knocking down TRIM28 exerted the opposite effect. Mechanistically, TRIM28 targeted MAVS for proteasome-mediated degradation via K48-linked polyubiquitination. The RING domain of TRIM28, especially the cysteine residues at positions 65 and 68, was critical for the suppressive effect of TRIM28 on MAVS-mediated RLR signaling, while each of the C-terminal domains of TRIM28 contributed to its interaction with MAVS. Further investigation revealed that TRIM28 transferred ubiquitin chains to the K7, K10, K371, K420, and K500 residues of MAVS. Together, our results reveal a previously uncharacterized mechanism involving TRIM28 in fine-tuning innate immune responses and provide new insights into the mechanisms by which MAVS is regulated, which contribute to the understanding of the molecular mechanisms underlying immune homeostasis maintenance.
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Affiliation(s)
- Ya-Yun Chen
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Xiang-Hong Ran
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Run-Ze Ni
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Dan Mu
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China.
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24
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Fang R, Jiang Q, Jia X, Jiang Z. ARMH3-mediated recruitment of PI4KB directs Golgi-to-endosome trafficking and activation of the antiviral effector STING. Immunity 2023; 56:500-515.e6. [PMID: 36921576 DOI: 10.1016/j.immuni.2023.02.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 11/30/2022] [Accepted: 01/26/2023] [Indexed: 03/15/2023]
Abstract
The cGAS-STING pathway mediates cytoplasmic DNA-triggered innate immunity. STING activation is initiated by cyclic-GMP-AMP (cGAMP)-induced translocation from the endoplasmic reticulum and sulfated glycosaminoglycans-induced polymerization at the Golgi. Here, we examine the mechanisms underlying STING transport and activation beyond the Golgi. A genome-wide CRISPR-Cas9 screen identified Armadillo-like helical domain-containing protein 3 (ARMH3) as critical for STING activation. Upon cGAMP-triggered translocation, ARMH3 interacted with STING at the Golgi and recruited phosphatidylinositol 4-kinase beta (PI4KB) to synthesize PI4P, which directed STING Golgi-to-endosome trafficking via PI4P-binding proteins AP-1 and GGA2. Disrupting PI4P-dependent lipid transport through RNAi of other PI4P-binding proteins impaired STING activation. Consistently, disturbed lipid composition inhibited STING activation, whereas aberrantly elevated cellular PI4P led to cGAS-independent STING activation. Armh3fl/fllLyzCre/Cre mice were susceptible to DNA virus challenge in vivo. Thus, ARMH3 bridges STING and PIK4B to generate PI4P for STING transportation and activation, an interaction conserved in all eukaryotes.
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Affiliation(s)
- Run Fang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing 100871, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Qifei Jiang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing 100871, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Xinying Jia
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing 100871, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Zhengfan Jiang
- Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education, School of Life Sciences, Peking University, Beijing 100871, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China.
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25
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Girardi E, Messmer M, Lopez P, Fender A, Chicher J, Chane-Woon-Ming B, Hammann P, Pfeffer S. Proteomics-based determination of double-stranded RNA interactome reveals known and new factors involved in Sindbis virus infection. RNA (NEW YORK, N.Y.) 2023; 29:361-375. [PMID: 36617674 PMCID: PMC9945444 DOI: 10.1261/rna.079270.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
Viruses are obligate intracellular parasites, which depend on the host cellular machineries to replicate their genome and complete their infectious cycle. Long double-stranded (ds)RNA is a common viral by-product originating during RNA virus replication and is universally sensed as a danger signal to trigger the antiviral response. As a result, viruses hide dsRNA intermediates into viral replication factories and have evolved strategies to hijack cellular proteins for their benefit. The characterization of the host factors associated with viral dsRNA and involved in viral replication remains a major challenge to develop new antiviral drugs against RNA viruses. Here, we performed anti-dsRNA immunoprecipitation followed by mass spectrometry analysis to fully characterize the dsRNA interactome in Sindbis virus (SINV) infected human cells. Among the identified proteins, we characterized SFPQ (splicing factor, proline-glutamine rich) as a new dsRNA-associated proviral factor upon SINV infection. We showed that SFPQ depletion reduces SINV infection in human HCT116 and SK-N-BE(2) cells, suggesting that SFPQ enhances viral production. We demonstrated that the cytoplasmic fraction of SFPQ partially colocalizes with dsRNA upon SINV infection. In agreement, we proved by RNA-IP that SFPQ can bind dsRNA and viral RNA. Furthermore, we showed that overexpression of a wild-type, but not an RNA binding mutant SFPQ, increased viral infection, suggesting that RNA binding is essential for its positive effect on the virus. Overall, this study provides the community with a compendium of dsRNA-associated factors during viral infection and identifies SFPQ as a new proviral dsRNA binding protein.
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Affiliation(s)
- Erika Girardi
- Université de Strasbourg, Architecture et Réactivité de l'ARN, Institut de Biologie Moléculaire et Cellulaire du CNRS, 67084 Strasbourg France
| | - Mélanie Messmer
- Université de Strasbourg, Architecture et Réactivité de l'ARN, Institut de Biologie Moléculaire et Cellulaire du CNRS, 67084 Strasbourg France
| | - Paula Lopez
- Université de Strasbourg, Architecture et Réactivité de l'ARN, Institut de Biologie Moléculaire et Cellulaire du CNRS, 67084 Strasbourg France
| | - Aurélie Fender
- Université de Strasbourg, Architecture et Réactivité de l'ARN, Institut de Biologie Moléculaire et Cellulaire du CNRS, 67084 Strasbourg France
| | - Johana Chicher
- Université de Strasbourg, Institut de Biologie Moléculaire et Cellulaire du CNRS, Plateforme Protéomique Strasbourg-Esplanade, 67084 Strasbourg France
| | - Béatrice Chane-Woon-Ming
- Université de Strasbourg, Architecture et Réactivité de l'ARN, Institut de Biologie Moléculaire et Cellulaire du CNRS, 67084 Strasbourg France
| | - Philippe Hammann
- Université de Strasbourg, Institut de Biologie Moléculaire et Cellulaire du CNRS, Plateforme Protéomique Strasbourg-Esplanade, 67084 Strasbourg France
| | - Sébastien Pfeffer
- Université de Strasbourg, Architecture et Réactivité de l'ARN, Institut de Biologie Moléculaire et Cellulaire du CNRS, 67084 Strasbourg France
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Bhattarai K, Holcik M. Diverse roles of heterogeneous nuclear ribonucleoproteins in viral life cycle. FRONTIERS IN VIROLOGY 2022. [DOI: 10.3389/fviro.2022.1044652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Understanding the host-virus interactions helps to decipher the viral replication strategies and pathogenesis. Viruses have limited genetic content and rely significantly on their host cell to establish a successful infection. Viruses depend on the host for a broad spectrum of cellular RNA-binding proteins (RBPs) throughout their life cycle. One of the major RBP families is the heterogeneous nuclear ribonucleoproteins (hnRNPs) family. hnRNPs are typically localized in the nucleus, where they are forming complexes with pre-mRNAs and contribute to many aspects of nucleic acid metabolism. hnRNPs contain RNA binding motifs and frequently function as RNA chaperones involved in pre-mRNA processing, RNA splicing, and export. Many hnRNPs shuttle between the nucleus and the cytoplasm and influence cytoplasmic processes such as mRNA stability, localization, and translation. The interactions between the hnRNPs and viral components are well-known. They are critical for processing viral nucleic acids and proteins and, therefore, impact the success of the viral infection. This review discusses the molecular mechanisms by which hnRNPs interact with and regulate each stage of the viral life cycle, such as replication, splicing, translation, and assembly of virus progeny. In addition, we expand on the role of hnRNPs in the antiviral response and as potential targets for antiviral drug research and development.
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27
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Huang S, Cheng A, Wang M, Yin Z, Huang J, Jia R. Viruses utilize ubiquitination systems to escape TLR/RLR-mediated innate immunity. Front Immunol 2022; 13:1065211. [PMID: 36505476 PMCID: PMC9732732 DOI: 10.3389/fimmu.2022.1065211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 11/10/2022] [Indexed: 11/26/2022] Open
Abstract
When the viruses invade the body, they will be recognized by the host pattern recognition receptors (PRRs) such as Toll like receptor (TLR) or retinoic acid-induced gene-I like receptor (RLR), thus causing the activation of downstream antiviral signals to resist the virus invasion. The cross action between ubiquitination and proteins in these signal cascades enhances the antiviral signal. On the contrary, more and more viruses have also been found to use the ubiquitination system to inhibit TLR/RLR mediated innate immunity. Therefore, this review summarizes how the ubiquitination system plays a regulatory role in TLR/RLR mediated innate immunity, and how viruses use the ubiquitination system to complete immune escape.
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Affiliation(s)
- Shanzhi Huang
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China,Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Anchun Cheng
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China,Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China,Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Mingshu Wang
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China,Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China,Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zhongqiong Yin
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Juan Huang
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China,Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China,Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Renyong Jia
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China,Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China,Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China,*Correspondence: Renyong Jia,
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Ji L, Wang Y, Zhou L, Lu J, Bao S, Shen Q, Wang X, Liu Y, Zhang W. E3 Ubiquitin Ligases: The Operators of the Ubiquitin Code That Regulates the RLR and cGAS-STING Pathways. Int J Mol Sci 2022; 23:ijms232314601. [PMID: 36498930 PMCID: PMC9740615 DOI: 10.3390/ijms232314601] [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: 09/27/2022] [Revised: 11/20/2022] [Accepted: 11/22/2022] [Indexed: 11/24/2022] Open
Abstract
The outbreaks caused by RNA and DNA viruses, such as SARS-CoV-2 and monkeypox, pose serious threats to human health. The RLR and cGAS-STING pathways contain major cytoplasmic sensors and signaling transduction axes for host innate antiviral immunity. In physiological and virus-induced pathological states, the activation and inactivation of these signal axes are tightly controlled, especially post-translational modifications (PTMs). E3 ubiquitin ligases (E3s) are the direct manipulator of ubiquitin codons and determine the type and modification type of substrate proteins. Therefore, members of the E3s family are involved in balancing the host's innate antiviral immune responses, and their functions have been extensively studied over recent decades. In this study, we overviewed the mechanisms of different members of three E3s families that mediate the RLR and cGAS-STING axes and analyzed them as potential molecular targets for the prevention and treatment of virus-related diseases.
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29
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Sarry M, Vitour D, Zientara S, Bakkali Kassimi L, Blaise-Boisseau S. Foot-and-Mouth Disease Virus: Molecular Interplays with IFN Response and the Importance of the Model. Viruses 2022; 14:v14102129. [PMID: 36298684 PMCID: PMC9610432 DOI: 10.3390/v14102129] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/19/2022] [Accepted: 09/19/2022] [Indexed: 11/18/2022] Open
Abstract
Foot-and-mouth disease (FMD) is a highly contagious viral disease of cloven-hoofed animals with a significant socioeconomic impact. One of the issues related to this disease is the ability of its etiological agent, foot-and-mouth disease virus (FMDV), to persist in the organism of its hosts via underlying mechanisms that remain to be elucidated. The establishment of a virus–host equilibrium via protein–protein interactions could contribute to explaining these phenomena. FMDV has indeed developed numerous strategies to evade the immune response, especially the type I interferon response. Viral proteins target this innate antiviral response at different levels, ranging from blocking the detection of viral RNAs to inhibiting the expression of ISGs. The large diversity of impacts of these interactions must be considered in the light of the in vitro models that have been used to demonstrate them, some being sometimes far from biological systems. In this review, we have therefore listed the interactions between FMDV and the interferon response as exhaustively as possible, focusing on both their biological effect and the study models used.
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Affiliation(s)
- Morgan Sarry
- UMR VIROLOGIE, INRAE, École Nationale Vétérinaire d’Alfort, ANSES Laboratoire de Santé Animale, Université Paris-Est, 94700 Maisons-Alfort, France
- AgroParisTech, 75005 Paris, France
- Correspondence: (M.S.); (S.B.-B.)
| | - Damien Vitour
- UMR VIROLOGIE, INRAE, École Nationale Vétérinaire d’Alfort, ANSES Laboratoire de Santé Animale, Université Paris-Est, 94700 Maisons-Alfort, France
| | - Stephan Zientara
- UMR VIROLOGIE, INRAE, École Nationale Vétérinaire d’Alfort, ANSES Laboratoire de Santé Animale, Université Paris-Est, 94700 Maisons-Alfort, France
| | - Labib Bakkali Kassimi
- UMR VIROLOGIE, INRAE, École Nationale Vétérinaire d’Alfort, ANSES Laboratoire de Santé Animale, Université Paris-Est, 94700 Maisons-Alfort, France
| | - Sandra Blaise-Boisseau
- UMR VIROLOGIE, INRAE, École Nationale Vétérinaire d’Alfort, ANSES Laboratoire de Santé Animale, Université Paris-Est, 94700 Maisons-Alfort, France
- Correspondence: (M.S.); (S.B.-B.)
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Huang JP, Li J, Xiao YP, Xu LG. BAG6 negatively regulates the RLR signaling pathway by targeting VISA/MAVS. Front Immunol 2022; 13:972184. [PMID: 36045679 PMCID: PMC9420869 DOI: 10.3389/fimmu.2022.972184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 07/25/2022] [Indexed: 12/03/2022] Open
Abstract
The virus-induced signaling adaptor protein VISA (also known as MAVS, ISP-1, Cardif) is a critical adaptor protein in the innate immune response to RNA virus infection. Upon viral infection, VISA self-aggregates to form a sizeable prion-like complex and recruits downstream signal components for signal transduction. Here, we discover that BAG6 (BCL2-associated athanogene 6, formerly BAT3 or Scythe) is an essential negative regulator in the RIG-I-like receptor signaling pathway. BAG6 inhibits the aggregation of VISA by promoting the K48-linked ubiquitination and specifically attenuates the recruitment of TRAF2 by VISA to inhibit RLR signaling. The aggregation of VISA and the interaction of VISA and TRAF2 are enhanced in BAG6-deficient cell lines after viral infection, resulting in the enhanced transcription level of downstream antiviral genes. Our research shows that BAG6 is a critical regulating factor in RIG-I/VISA-mediated innate immune response by targeting VISA.
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Tembusu Virus Nonstructural Protein 2B Antagonizes Type I Interferon Production by Targeting MAVS for Degradation. J Virol 2022; 96:e0081622. [PMID: 35867574 PMCID: PMC9327690 DOI: 10.1128/jvi.00816-22] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Tembusu virus (TMUV) is a newly emerged avian flavivirus that has caused severe egg-drop syndrome and fatal encephalitis in domestic ducks. It has spread widely throughout the main duck-producing areas in Asia, resulting in substantial economic losses to the duck industry. Previous studies have reported that TMUV has evolved several strategies to counteract the duck's innate immune responses to successfully establish infection in its host cells. However, the mechanisms underlying this phenomenon have not been elucidated. Here, we discovered that TMUV-encoded NS2B is a negative regulator of poly(I:C)-induced duck interferon-β (IFN-β) expression. Mechanistically, TMUV NS2B was found to interact specifically with the mitochondrial antiviral-signaling protein (duMAVS). Consequently, duMAVS was degraded through the K48-linked ubiquitination and proteasomal pathway, leading to the interruption of the RIG-I-like receptor (RLR) signaling. Further analyses also identified K321, K354, K398, and K411 as crucial residues for NS2B-mediated ubiquitination and degradation of duMAVS. Additionally, we demonstrated that NS2B functions by recruiting the E3 ubiquitin ligase duck membrane-associated RING-CH-type finger 5 (duMARCH5) to modify duMAVS via polyubiquitination, blocking the duMAVS-mediated innate immune response and promoting TMUV replication. Taken together, our findings revealed a novel mechanism by which TMUV evades the duck's antiviral innate immune responses. IMPORTANCE Tembusu virus (TMUV), an emerging pathogenic flavivirus, has spread to most duck farming areas in Asia since 2010, causing significant economic losses to the duck industry. Recently, TMUV has expanded its host range and may pose a potential threat to mammals, including humans. Understanding the interaction between TMUV and its host is essential for the development of effective vaccines and therapeutics. Here, we show that NS2B encoded by TMUV inhibits IFN production by interacting with duck MAVS (duMAVS) to mediate ubiquitination and proteasomal degradation. Further studies suggest that the E3 ubiquitin ligase duck membrane-associated RING-CH-type finger 5 (duMARCH5) is recruited by NS2B to mediate proteasomal degradation of duMAVS. As a result, the innate immune response triggered by the RIG-I-like receptor (RLR) is disrupted, facilitating viral replication. Overall, our results reveal a novel mechanism by which TMUV evades host innate immunity and provide new therapeutic strategies to prevent TMUV infection.
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Liu W, Ma Z, Wu Y, Yuan C, Zhang Y, Liang Z, Yang Y, Zhang W, Jiao P. MST4 negatively regulates type I interferons production via targeting MAVS-mediated pathway. Cell Commun Signal 2022; 20:103. [PMID: 35820905 PMCID: PMC9274187 DOI: 10.1186/s12964-022-00922-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 06/15/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Cytosolic RNA sensing can elicit immune responses against viral pathogens. However, antiviral responses must be tightly regulated to avoid the uncontrolled production of type I interferons (IFN) that might have deleterious effects on the host. Upon bacterial infection, the germinal center kinase MST4 can directly phosphorylate the adaptor TRAF6 to limit the inflammatory responses, thereby avoiding the damage caused by excessive immune activation. However, the molecular mechanism of how MST4 regulates virus-mediated type I IFN production remains unknown. METHODS The expression levels of IFN-β, IFIT1, and IFIT2 mRNA were determined by RT-PCR. The expression levels of p-IRF3, IRF3, RIG-I, MAVS, and MST4 proteins were determined by Western blot. The effect of secreted level of IFN-β was measured by ELISA. The relationship between MST4 and MAVS was investigated by immunofluorescence staining and coimmunoprecipitation. RESULTS In this study, we reported that MST4 can act as a negative regulator of type I IFN production. Ectopic expression of MST4 suppressed the Poly (I:C) (polyino-sinic-polycytidylic acid)- and Sendai virus (SeV)-triggered production of type I IFN, while the knockdown of MST4 enhanced the production of type I IFN. Mechanistically, upon SeV infection, the MST4 competed with TRAF3 to bind to the 360-540 domain of MAVS, thereby inhibiting the TRAF3/MAVS association. Additionally, MST4 facilitated the interaction between the E3 ubiquitin ligase Smurf1 and MAVS. This promoted the K48-linked ubiquitination of MAVS, thereby accelerating the ubiquitin-mediated proteasome degradation of MAVS. CONCLUSIONS Our findings showed that MST4 acted as a crucial negative regulator of RLR-mediated type I IFN production. Video Abstract.
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Affiliation(s)
- Wei Liu
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Zhenling Ma
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Yaru Wu
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Cui Yuan
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Yanyan Zhang
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Zeyang Liang
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Yu Yang
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Wenwen Zhang
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Pengtao Jiao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
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Tankyrases inhibit innate antiviral response by PARylating VISA/MAVS and priming it for RNF146-mediated ubiquitination and degradation. Proc Natl Acad Sci U S A 2022; 119:e2122805119. [PMID: 35733260 DOI: 10.1073/pnas.2122805119] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
During viral infection, sensing of viral RNA by retinoic acid-inducible gene-I-like receptors (RLRs) initiates an antiviral innate immune response, which is mediated by the mitochondrial adaptor protein VISA (virus-induced signal adaptor; also known as mitochondrial antiviral signaling protein [MAVS]). VISA is regulated by various posttranslational modifications (PTMs), such as polyubiquitination, phosphorylation, O-linked β-d-N-acetylglucosaminylation (O-GlcNAcylation), and monomethylation. However, whether other forms of PTMs regulate VISA-mediated innate immune signaling remains elusive. Here, we report that Poly(ADP-ribosyl)ation (PARylation) is a PTM of VISA, which attenuates innate immune response to RNA viruses. Using a biochemical purification approach, we identified tankyrase 1 (TNKS1) as a VISA-associated protein. Viral infection led to the induction of TNKS1 and its homolog TNKS2, which translocated from cytosol to mitochondria and interacted with VISA. TNKS1 and TNKS2 catalyze the PARylation of VISA at Glu137 residue, thereby priming it for K48-linked polyubiquitination by the E3 ligase Ring figure protein 146 (RNF146) and subsequent degradation. Consistently, TNKS1, TNKS2, or RNF146 deficiency increased the RNA virus-triggered induction of downstream effector genes and impaired the replication of the virus. Moreover, TNKS1- or TNKS2-deficient mice produced higher levels of type I interferons (IFNs) and proinflammatory cytokines after virus infection and markedly reduced virus loads in the brains and lungs. Together, our findings uncover an essential role of PARylation of VISA in virus-triggered innate immune signaling, which represents a mechanism to avoid excessive harmful immune response.
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Deng Y, Wang Y, Li L, Miao EA, Liu P. Post-Translational Modifications of Proteins in Cytosolic Nucleic Acid Sensing Signaling Pathways. Front Immunol 2022; 13:898724. [PMID: 35795661 PMCID: PMC9250978 DOI: 10.3389/fimmu.2022.898724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/17/2022] [Indexed: 11/25/2022] Open
Abstract
The innate immune response is the first-line host defense against pathogens. Cytosolic nucleic acids, including both DNA and RNA, represent a special type of danger signal to initiate an innate immune response. Activation of cytosolic nucleic acid sensors is tightly controlled in order to achieve the high sensitivity needed to combat infection while simultaneously preventing false activation that leads to pathologic inflammatory diseases. In this review, we focus on post-translational modifications of key cytosolic nucleic acid sensors that can reversibly or irreversibly control these sensor functions. We will describe phosphorylation, ubiquitination, SUMOylation, neddylation, acetylation, methylation, succinylation, glutamylation, amidation, palmitoylation, and oxidation modifications events (including modified residues, modifying enzymes, and modification function). Together, these post-translational regulatory modifications on key cytosolic DNA/RNA sensing pathway members reveal a complicated yet elegantly controlled multilayer regulator network to govern innate immune activation.
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Affiliation(s)
- Yu Deng
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- Department of Biochemistry and Biophysics, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Ying Wang
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- Department of Biochemistry and Biophysics, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- Curriculum in Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Lupeng Li
- Department of Immunology and Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, United States
- Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Edward A. Miao
- Department of Immunology and Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, United States
| | - Pengda Liu
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- Department of Biochemistry and Biophysics, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- Curriculum in Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- *Correspondence: Pengda Liu,
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Poly(C)-binding protein 2 positively regulates interferon downstream signaling. Acta Biochim Biophys Sin (Shanghai) 2022; 54:748-751. [PMID: 35593468 PMCID: PMC9828312 DOI: 10.3724/abbs.2022032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Gu H, Yang J, Zhang J, Song Y, Zhang Y, Xu P, Zhu Y, Wang L, Zhang P, Li L, Chen D, Sun Q. PCBP2 maintains antiviral signaling homeostasis by regulating cGAS enzymatic activity via antagonizing its condensation. Nat Commun 2022; 13:1564. [PMID: 35322803 PMCID: PMC8943206 DOI: 10.1038/s41467-022-29266-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 03/07/2022] [Indexed: 02/07/2023] Open
Abstract
Cyclic GMP-AMP synthase (cGAS) plays a major role in detecting pathogenic DNA. It produces cyclic dinucleotide cGAMP, which subsequently binds to the adaptor protein STING and further triggers antiviral innate immune responses. However, the molecular mechanisms regulating cGAS enzyme activity remain largely unknown. Here, we characterize the cGAS-interacting protein Poly(rC)-binding protein 2 (PCBP2), which plays an important role in controlling cGAS enzyme activity, thereby mediating appropriate cGAS-STING signaling transduction. We find that PCBP2 overexpression reduces cGAS-STING antiviral signaling, whereas loss of PCBP2 significantly increases cGAS activity. Mechanistically, we show that PCBP2 negatively regulates anti-DNA viral signaling by specifically interacting with cGAS but not other components. Moreover, PCBP2 decreases cGAS enzyme activity by antagonizing cGAS condensation, thus ensuring the appropriate production of cGAMP and balancing cGAS-STING signal transduction. Collectively, our findings provide insight into how the cGAS-mediated antiviral signaling is regulated.
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Affiliation(s)
- Haiyan Gu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Datun Road, Chaoyang District, Beijing, 100101, China.,Institute of Biomedical Research, Yunnan University, Kunming, 650500, China.,Institute of Stem Cells and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China.,School of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jing Yang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Datun Road, Chaoyang District, Beijing, 100101, China
| | - Jiayu Zhang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Datun Road, Chaoyang District, Beijing, 100101, China.,Institute of Stem Cells and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China.,School of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ying Song
- Institute of Biomedical Research, Yunnan University, Kunming, 650500, China
| | - Yao Zhang
- Institute of Biomedical Research, Yunnan University, Kunming, 650500, China
| | - Pengfei Xu
- Institute of Biomedical Research, Yunnan University, Kunming, 650500, China
| | - Yuanxiang Zhu
- Institute of Biomedical Research, Yunnan University, Kunming, 650500, China
| | - Liangliang Wang
- Institute of Biomedical Research, Yunnan University, Kunming, 650500, China
| | - Pengfei Zhang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Datun Road, Chaoyang District, Beijing, 100101, China
| | - Lin Li
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Datun Road, Chaoyang District, Beijing, 100101, China.,Institute of Stem Cells and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China
| | - Dahua Chen
- Institute of Biomedical Research, Yunnan University, Kunming, 650500, China.
| | - Qinmiao Sun
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Datun Road, Chaoyang District, Beijing, 100101, China. .,Institute of Stem Cells and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China. .,School of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
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Ferritinophagy and α-Synuclein: Pharmacological Targeting of Autophagy to Restore Iron Regulation in Parkinson's Disease. Int J Mol Sci 2022; 23:ijms23042378. [PMID: 35216492 PMCID: PMC8878351 DOI: 10.3390/ijms23042378] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 02/08/2022] [Accepted: 02/08/2022] [Indexed: 02/04/2023] Open
Abstract
A major hallmark of Parkinson’s disease (PD) is the fatal destruction of dopaminergic neurons within the substantia nigra pars compacta. This event is preceded by the formation of Lewy bodies, which are cytoplasmic inclusions composed of α-synuclein protein aggregates. A triad contribution of α-synuclein aggregation, iron accumulation, and mitochondrial dysfunction plague nigral neurons, yet the events underlying iron accumulation are poorly understood. Elevated intracellular iron concentrations up-regulate ferritin expression, an iron storage protein that provides cytoprotection against redox stress. The lysosomal degradation pathway, autophagy, can release iron from ferritin stores to facilitate its trafficking in a process termed ferritinophagy. Aggregated α-synuclein inhibits SNARE protein complexes and destabilizes microtubules to halt vesicular trafficking systems, including that of autophagy effectively. The scope of this review is to describe the physiological and pathological relationship between iron regulation and α-synuclein, providing a detailed understanding of iron metabolism within nigral neurons. The underlying mechanisms of autophagy and ferritinophagy are explored in the context of PD, identifying potential therapeutic targets for future investigation.
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Martín-Vicente M, Resino S, Martínez I. Early innate immune response triggered by the human respiratory syncytial virus and its regulation by ubiquitination/deubiquitination processes. J Biomed Sci 2022; 29:11. [PMID: 35152905 PMCID: PMC8841119 DOI: 10.1186/s12929-022-00793-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 01/28/2022] [Indexed: 12/25/2022] Open
Abstract
The human respiratory syncytial virus (HRSV) causes severe lower respiratory tract infections in infants and the elderly. An exuberant inadequate immune response is behind most of the pathology caused by the HRSV. The main targets of HRSV infection are the epithelial cells of the respiratory tract, where the immune response against the virus begins. This early innate immune response consists of the expression of hundreds of pro-inflammatory and anti-viral genes that stimulates subsequent innate and adaptive immunity. The early innate response in infected cells is mediated by intracellular signaling pathways composed of pattern recognition receptors (PRRs), adapters, kinases, and transcriptions factors. These pathways are tightly regulated by complex networks of post-translational modifications, including ubiquitination. Numerous ubiquitinases and deubiquitinases make these modifications reversible and highly dynamic. The intricate nature of the signaling pathways and their regulation offers the opportunity for fine-tuning the innate immune response against HRSV to control virus replication and immunopathology.
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Affiliation(s)
- María Martín-Vicente
- Unidad de Infección Viral E Inmunidad, Centro Nacional de Microbiología, Instituto de Salud Carlos III (Campus Majadahonda), Carretera Majadahonda-Pozuelo, Km 2.2, 28220 Majadahonda, Madrid, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain
| | - Salvador Resino
- Unidad de Infección Viral E Inmunidad, Centro Nacional de Microbiología, Instituto de Salud Carlos III (Campus Majadahonda), Carretera Majadahonda-Pozuelo, Km 2.2, 28220 Majadahonda, Madrid, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain
| | - Isidoro Martínez
- Unidad de Infección Viral E Inmunidad, Centro Nacional de Microbiología, Instituto de Salud Carlos III (Campus Majadahonda), Carretera Majadahonda-Pozuelo, Km 2.2, 28220 Majadahonda, Madrid, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Infecciosas, Instituto de Salud Carlos III, Madrid, Spain
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Abstract
REC8 meiotic recombination protein (REC8) is a member of structural maintenance of chromosome (SMC) protein partners, which play an important role in meiosis, anti-tumor, and sperm formation. As the adapter proteins of RLR signaling and cGAS-DNA signaling, the activity and stability of MAVS (also known as VISA, Cardif and IPS-1) and STING (also known as MITA) are critical for innate immunity. Here, we report that REC8 interacts with MAVS and STING, and inhibits their ubiquitination and subsequent degradation, thereby promoting innate antiviral signaling. REC8 is upregulated through the JAK-STAT signaling pathway under viral infection. Knockdown of REC8 impair the innate immune responses against VSV (Vesicular Stomatitis Virus), NDV (Newcastle disease virus) and HSV (herpes simplex virus). Mechanistically, under the infection of viruses, the SUMOylated REC8 is transferred from the nucleus to the cytoplasm and then interacts with MAVS and STING to inhibit their K48-linked ubiquitination triggered by RNF5. Moreover, REC8 promotes the recruitment of TBK1 to MAVS and STING. Thus, REC8 functions as a positive modulator of innate immunity. Our work highlights a previously undocumented role of meiosis-associated protein REC8 in regulating innate immunity. IMPORTANCE The innate immune response is crucial for the host to resist the invasion of viruses and other pathogens. STING and MAVS play a critical role in the innate immune response to DNA and RNA viral infection, respectively. In this study, REC8 promotes the innate immune response by targeting STING and MAVS. Notably, REC8 interacts with MAVS and STING in the cytoplasm and inhibits K48-linked ubiquitination of MAVS and STING triggered by RNF5, stabilizing MAVS and STING protein to promote innate immunity and gradually inhibiting viral infection. Our study provides a new insight for the study of antiviral innate immune.
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Xu S, Han L, Wei Y, Zhang B, Wang Q, Liu J, Liu M, Chen Z, Wang Z, Chen H, Zhu Q. MicroRNA-200c-targeted contactin 1 facilitates the replication of influenza A virus by accelerating the degradation of MAVS. PLoS Pathog 2022; 18:e1010299. [PMID: 35171955 PMCID: PMC8849533 DOI: 10.1371/journal.ppat.1010299] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 01/21/2022] [Indexed: 01/06/2023] Open
Abstract
Influenza A viruses (IAVs) continuously challenge the poultry industry and human health. Elucidation of the host factors that modulate the IAV lifecycle is vital for developing antiviral drugs and vaccines. In this study, we infected A549 cells with IAVs and found that host protein contactin-1 (CNTN1), a member of the immunoglobulin superfamily, enhanced viral replication. Bioinformatic prediction and experimental validation indicated that the expression of CNTN1 was reduced by microRNA-200c (miR-200c) through directly targeting. We further showed that CNTN1-modulated viral replication in A549 cells is dependent on type I interferon signaling. Co-immunoprecipitation experiments revealed that CNTN1 specifically interacts with MAVS and promotes its proteasomal degradation by removing its K63-linked ubiquitination. Moreover, we discovered that the deubiquitinase USP25 is recruited by CNTN1 to catalyze the deubiquitination of K63-linked MAVS. Consequently, the CNTN1-induced degradation cascade of MAVS blocked RIG-I-MAVS-mediated interferon signaling, leading to enhanced viral replication. Taken together, our data reveal novel roles of CNTN1 in the type I interferon pathway and regulatory mechanism of IAV replication.
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Affiliation(s)
- Shuai Xu
- State Key Laboratory of Veterinary Etiological Biology, College of Animal Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, PR China
| | - Lu Han
- State Key Laboratory of Veterinary Etiological Biology, College of Animal Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, PR China
| | - Yanli Wei
- State Key Laboratory of Veterinary Etiological Biology, College of Animal Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, PR China
| | - Bo Zhang
- State Key Laboratory of Veterinary Etiological Biology, College of Animal Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, PR China
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, PR China
| | - Qian Wang
- State Key Laboratory of Veterinary Etiological Biology, College of Animal Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, PR China
| | - Junwen Liu
- State Key Laboratory of Veterinary Etiological Biology, College of Animal Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, PR China
| | - Minxuan Liu
- State Key Laboratory of Veterinary Etiological Biology, College of Animal Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, PR China
| | - Zhaoshan Chen
- State Key Laboratory of Veterinary Etiological Biology, College of Animal Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, PR China
| | - Zhengxiang Wang
- State Key Laboratory of Veterinary Etiological Biology, College of Animal Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, PR China
| | - Hualan Chen
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, PR China
| | - Qiyun Zhu
- State Key Laboratory of Veterinary Etiological Biology, College of Animal Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, PR China
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Soh SM, Kim YJ, Kim HH, Lee HR. Modulation of Ubiquitin Signaling in Innate Immune Response by Herpesviruses. Int J Mol Sci 2022; 23:ijms23010492. [PMID: 35008917 PMCID: PMC8745310 DOI: 10.3390/ijms23010492] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 12/30/2021] [Accepted: 12/31/2021] [Indexed: 12/16/2022] Open
Abstract
The ubiquitin proteasome system (UPS) is a protein degradation machinery that is crucial for cellular homeostasis in eukaryotes. Therefore, it is not surprising that the UPS coordinates almost all host cellular processes, including host-pathogen interactions. This protein degradation machinery acts predominantly by tagging substrate proteins designated for degradation with a ubiquitin molecule. These ubiquitin tags have been involved at various steps of the innate immune response. Hence, herpesviruses have evolved ways to antagonize the host defense mechanisms by targeting UPS components such as ubiquitin E3 ligases and deubiquitinases (DUBs) that establish a productive infection. This review delineates how herpesviruses usurp the critical roles of ubiquitin E3 ligases and DUBs in innate immune response to escape host-antiviral immune response, with particular focus on retinoic acid-inducible gene I (RIG-I)-like receptors (RLR), cyclic-GMP-AMP (cGAMP) synthase (cGAS), stimulator of interferon (IFN) genes (STING) pathways, and inflammasome signaling.
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Affiliation(s)
- Sandrine-M. Soh
- Department of Biotechnology and Bioinformatics, College of Science and Technology, Korea University, Sejong 30019, Korea; (S.-M.S.); (Y.-J.K.); (H.-H.K.)
| | - Yeong-Jun Kim
- Department of Biotechnology and Bioinformatics, College of Science and Technology, Korea University, Sejong 30019, Korea; (S.-M.S.); (Y.-J.K.); (H.-H.K.)
| | - Hong-Hee Kim
- Department of Biotechnology and Bioinformatics, College of Science and Technology, Korea University, Sejong 30019, Korea; (S.-M.S.); (Y.-J.K.); (H.-H.K.)
| | - Hye-Ra Lee
- Department of Biotechnology and Bioinformatics, College of Science and Technology, Korea University, Sejong 30019, Korea; (S.-M.S.); (Y.-J.K.); (H.-H.K.)
- Department of Laboratory Medicine, College of Medicine, Korea University, Seoul 136-701, Korea
- Correspondence: ; Tel.: +82-44-860-1831
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Zhu L, Li X, Xu H, Fu L, Gao GF, Liu W, Zhao L, Wang X, Jiang W, Fang M. Multiple RNA virus matrix proteins interact with SLD5 to manipulate host cell cycle. J Gen Virol 2021; 102. [PMID: 34882534 PMCID: PMC8744269 DOI: 10.1099/jgv.0.001697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The matrix protein of many enveloped RNA viruses regulates multiple stages of viral life cycle and has the characteristics of nucleocytoplasmic shuttling. We have previously demonstrated that matrix protein 1 (M1) of an RNA virus, influenza virus, blocks host cell cycle progression by interacting with SLD5, a member of the GINS complex, which is required for normal cell cycle progression. In this study, we found that M protein of several other RNA viruses, including VSV, SeV and HIV, interacted with SLD5. Furthermore, VSV/SeV infection and M protein of VSV/SeV/HIV induced cell cycle arrest at G0/G1 phase. Importantly, overexpression of SLD5 partially rescued the cell cycle arrest by VSV/SeV infection and VSV M protein. In addition, SLD5 suppressed VSV replication in vitro and in vivo, and enhanced type Ⅰ interferon signalling. Taken together, our results suggest that targeting SLD5 by M protein might be a common strategy used by multiple enveloped RNA viruses to block host cell cycle. Our findings provide new mechanistic insights for virus to manipulate cell cycle progression by hijacking host replication factor SLD5 during infection.
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Affiliation(s)
- Li Zhu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China.,State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Xinyu Li
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China.,University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Henan Xu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Lifeng Fu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - George Fu Gao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Wenjun Liu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Linqing Zhao
- Laboratory of Virology, Beijing Key Laboratory of Etiology of Viral Diseases in Children, Capital Institute of Pediatrics, Beijing 100020, PR China
| | - Xiaojun Wang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Wei Jiang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Min Fang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China.,State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China.,International College, University of Chinese Academy of Sciences, Beijing 100049, PR China
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Wang C, Ling T, Zhong N, Xu LG. N4BP3 Regulates RIG-I-Like Receptor Antiviral Signaling Positively by Targeting Mitochondrial Antiviral Signaling Protein. Front Microbiol 2021; 12:770600. [PMID: 34880843 PMCID: PMC8646042 DOI: 10.3389/fmicb.2021.770600] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Accepted: 10/04/2021] [Indexed: 12/12/2022] Open
Abstract
Mitochondrial antiviral signaling protein (MAVS), an adaptor protein, is activated by RIG-I, which is critical for an effective innate immune response to infection by various RNA viruses. Viral infection causes the RIG-I-like receptor (RLR) to recognize pathogen-derived dsRNA and then becomes activated to promote prion-like aggregation and activation of MAVS. Subsequently, through the recruitment of TRAF proteins, MAVS activates two signaling pathways mediated by TBK1-IRF3 and IKK- NF-κb, respectively, and turns on type I interferon and proinflammatory cytokines. This study discovered that NEDD4 binding protein 3 (N4BP3) is a positive regulator of the RLR signaling pathway by targeting MAVS. Overexpression of N4BP3 promoted virus-induced activation of the interferon-β (IFN-β) promoter and interferon-stimulated response element (ISRE). Further experiments showed that knockdown or knockout N4BP3 impaired RIG-I-like receptor (RLR)-mediated innate immune response, induction of downstream antiviral genes, and cellular antiviral responses. We also detected that N4BP3 could accelerate the interaction between MAVS and TRAF2. Related experiments revealed that N4BP3 could facilitate the ubiquitination modification of MAVS. These findings suggest that N4BP3 is a critical component of the RIG-I-like receptor (RLR)-mediated innate immune response by targeting MAVS, which also provided insight into the mechanisms of innate antiviral responses.
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Affiliation(s)
- Chen Wang
- College of Life Science, Jiangxi Normal University, Nanchang, China
| | - Ting Ling
- College of Life Science, Jiangxi Normal University, Nanchang, China
| | - Ni Zhong
- College of Life Science, Jiangxi Normal University, Nanchang, China
| | - Liang-Guo Xu
- College of Life Science, Jiangxi Normal University, Nanchang, China
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Somasekharan SP, Gleave M. SARS-CoV-2 nucleocapsid protein interacts with immunoregulators and stress granules and phase separates to form liquid droplets. FEBS Lett 2021; 595:2872-2896. [PMID: 34780058 PMCID: PMC8652540 DOI: 10.1002/1873-3468.14229] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 11/02/2021] [Accepted: 11/04/2021] [Indexed: 12/16/2022]
Abstract
The current work investigated SARS‐CoV‐2 Nucleocapsid (NCAP or N protein) interactors in A549 human lung cancer cells using a SILAC‐based mass spectrometry approach. NCAP interactors included proteins of the stress granule (SG) machinery and immunoregulators. NCAP showed specific interaction with the SG proteins G3BP1, G3BP2, YTHDF3, USP10 and PKR, and translocated to SGs following oxidative stress and heat shock. Treatment of recombinant NCAP with RNA isolated from A549 cells exposed to oxidative stress‐stimulated NCAP to undergo liquid–liquid phase separation (LLPS). RNA degradation using RNase A treatment completely blocked the LLPS property of NCAP as well as its SG association. The RNA intercalator mitoxantrone also disrupted NCAP assembly in vitro and in cells. This study provides insight into the biological processes and biophysical properties of the SARS‐CoV‐2 NCAP.
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Affiliation(s)
- Syam Prakash Somasekharan
- Department of Urologic Sciences, Faculty of Medicine, Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
| | - Martin Gleave
- Department of Urologic Sciences, Faculty of Medicine, Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
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Chathuranga K, Weerawardhana A, Dodantenna N, Lee JS. Regulation of antiviral innate immune signaling and viral evasion following viral genome sensing. Exp Mol Med 2021; 53:1647-1668. [PMID: 34782737 PMCID: PMC8592830 DOI: 10.1038/s12276-021-00691-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 06/15/2021] [Accepted: 09/07/2021] [Indexed: 02/07/2023] Open
Abstract
A harmonized balance between positive and negative regulation of pattern recognition receptor (PRR)-initiated immune responses is required to achieve the most favorable outcome for the host. This balance is crucial because it must not only ensure activation of the first line of defense against viral infection but also prevent inappropriate immune activation, which results in autoimmune diseases. Recent studies have shown how signal transduction pathways initiated by PRRs are positively and negatively regulated by diverse modulators to maintain host immune homeostasis. However, viruses have developed strategies to subvert the host antiviral response and establish infection. Viruses have evolved numerous genes encoding immunomodulatory proteins that antagonize the host immune system. This review focuses on the current state of knowledge regarding key host factors that regulate innate immune signaling molecules upon viral infection and discusses evidence showing how specific viral proteins counteract antiviral responses via immunomodulatory strategies.
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Affiliation(s)
- Kiramage Chathuranga
- College of Veterinary Medicine, Chungnam National University, Daejeon, 34134, Korea
| | - Asela Weerawardhana
- College of Veterinary Medicine, Chungnam National University, Daejeon, 34134, Korea
| | - Niranjan Dodantenna
- College of Veterinary Medicine, Chungnam National University, Daejeon, 34134, Korea
| | - Jong-Soo Lee
- College of Veterinary Medicine, Chungnam National University, Daejeon, 34134, Korea.
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Ge QY, Chen J, Li GX, Tan XL, Song J, Ning D, Mo J, Du PC, Liu QM, Liang HF, Ding ZY, Zhang XW, Zhang BX. GRAMD4 inhibits tumour metastasis by recruiting the E3 ligase ITCH to target TAK1 for degradation in hepatocellular carcinoma. Clin Transl Med 2021; 11:e635. [PMID: 34841685 PMCID: PMC8597946 DOI: 10.1002/ctm2.635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 10/13/2021] [Accepted: 10/19/2021] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Aberrant TAK1 (transforming growth factor β-activated kinase 1) activity is known to be involved in a variety of malignancies, but the regulatory mechanisms of TAK1 remain poorly understood. GRAMD4 (glucosyltransferase Rab-like GTPase activator and myotubularin domain containing 4) is a newly discovered p53-independent proapoptotic protein with an unclear role in HCC (hepatocellular carcinoma). RESULTS In this research, we found that GRAMD4 expression was lower in HCC samples, and its downregulation predicted worse prognosis for patients after surgical resection. Functionally, GRAMD4 inhibited HCC migration, invasion and metastasis. Mechanistically, GRAMD4 interacted with TAK1 to promote its protein degradation, thus, resulting in the inactivation of MAPK (Mitogen-activated protein kinase) and NF-κB pathways. Furthermore, GRAMD4 was proved to recruit ITCH (itchy E3 ubiquitin protein ligase) to promote the ubiquitination of TAK1. Moreover, high expression of TAK1 was correlated with low expression of GRAMD4 in HCC patients. CONCLUSIONS GRAMD4 inhibits the migration and metastasis of HCC, mainly by recruiting ITCH to promote the degradation of TAK1, which leads to the inactivation of MAPK and NF-κB signalling pathways.
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Affiliation(s)
- Qian yun Ge
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Jin Chen
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Gan xun Li
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Xiao long Tan
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Jia Song
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Deng Ning
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Jie Mo
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Peng cheng Du
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Qiu meng Liu
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Hui fang Liang
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Ze yang Ding
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Xue wu Zhang
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
| | - Bi xiang Zhang
- Hepatic Surgery CenterTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanP. R. China
- Clinical Medical Research Center of Hepatic SurgeryWuhanP. R. China
- Hubei Key Laboratory of Hepato‐Pancreato‐Biliary DiseasesWuhanP. R. China
- Key Laboratory of Organ TransplantationMinistry of EducationWuhanP. R. China
- Key Laboratory of Organ TransplantationNational Health CommissionWuhanP. R. China
- Key Laboratory of Organ TransplantationChinese Academy of Medical SciencesWuhanP. R. China
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Abstract
The influenza A virus (IAV) infection is usually restricted to the respiratory tract and only rarely enters the central nervous system (CNS) and causes neurological symptoms. However, the roles of host factors involved in IAV infection in the CNS remain largely undetermined. Therefore, we aimed to characterize the host responses to IAV infection in the brain. We isolated a strain of IAV H5N6, which is neurotoxic and highly pathogenic to mice. High-throughput RNA sequencing (RNA-seq) revealed 240 differentially expressed genes in IAV-infected brains. Among the significantly downregulated genes, we focused on the gene encoding progesterone receptor membrane component-1 (PGRMC1) and observed that IAV H5N6 infection clearly inhibited PGRMC1 in both neuroblastoma and glioma cells. Furthermore, treatment with AG205, a PGRMC1-specific inhibitor, or PGRMC1 knockout promoted H5N6 multiplication in vitro, while overexpression of PGRMC1 resulted in opposite effects. Furthermore, AG205 treatment or PGRMC1 knockout significantly inhibited the retinoic acid-inducible gene I (RIG-I)-mediated interferon beta (IFN-β) signaling pathway and reduced the levels of several antiviral proteins (Mx1 and ISG15). In addition, PGRMC1-mediated regulation of IFN signaling relied on inhibition of the expression and ubiquitination of RIG-I. The loss of PGRMC1 leads to an increased susceptibility of mice (brain and lung) to influenza A virus infection. Conclusively, our results show for the first time that IAV H5N6 downregulates PGRMC1 expression to contribute to virus proliferation by inhibiting RIG-I-mediated IFN-β production in the brain. These findings may offer new insights regarding the interplay between IAV and host factors that may impact IAV pathogenicity in the brain. IMPORTANCE Central nervous system (CNS) disease is one of the most common extra-respiratory tract complications of influenza A virus (IAV) infections. However, there is still little knowledge about IAV regulating host responses in brain. In this study, we identified progesterone receptor membrane component-1 (PGRMC1) as a novel host factor involved in the replication and propagation of IAV H5N6 in the host brain. We also observed that PGRMC1 antagonism was required for viral evasion from the host immune response during IAV infection via inhibition of the retinoic acid-inducible gene I (RIG-I)-mediated interferon beta (IFN-β) signaling pathway and downstream antiviral gene expression. This study revealed a newly identified regulatory mechanism used by IAV H5N6 to ensure its life cycle in the CNS.
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Avian Metapneumovirus Subgroup C Induces Mitochondrial Antiviral Signaling Protein Degradation through the Ubiquitin-Proteasome Pathway. Viruses 2021; 13:v13101990. [PMID: 34696420 PMCID: PMC8537000 DOI: 10.3390/v13101990] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 12/12/2022] Open
Abstract
The mitochondrial antiviral signaling (MAVS) protein, a critical adapter, links the upstream recognition of viral RNA to downstream antiviral signal transduction. However, the interaction mechanism between avian metapneumovirus subgroup C (aMPV/C) infection and MAVS remains unclear. Here, we confirmed that aMPV/C infection induced a reduction in MAVS expression in Vero cells in a dose-dependent manner, and active aMPV/C replication was required for MAVS decrease. We also found that the reduction in MAVS occurred at the post-translational level rather than at the transcriptional level. Different inhibitors were used to examine the effect of proteasome or autophagy on the regulation of MAVS. Treatment with a proteasome inhibitor MG132 effectively blocked MAVS degradation. Moreover, we demonstrated that MAVS mainly underwent K48-linked ubiquitination in the presence of MG132 in aMPV/C-infected cells, with amino acids 363, 462, and 501 of MAVS being pivotal sites in the formation of polyubiquitin chains. Finally, E3 ubiquitin ligases for MAVS degradation were screened and identified and RNF5 targeting MAVS at Lysine 363 and 462 was shown to involve in MAVS degradation in aMPV/C-infected Vero cells. Overall, these results reveal the molecular mechanism underlying aMPV/C infection-induced MAVS degradation by the ubiquitin-proteasome pathway.
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Liao CY, Lei CQ, Shu HB. PCBP1 modulates the innate immune response by facilitating the binding of cGAS to DNA. Cell Mol Immunol 2021; 18:2334-2343. [PMID: 32415261 PMCID: PMC8484664 DOI: 10.1038/s41423-020-0462-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Revised: 04/29/2020] [Accepted: 04/30/2020] [Indexed: 02/07/2023] Open
Abstract
Cyclic GMP-AMP synthase (cGAS) is a key sensor critical for the recognition of DNA in the cytosol and catalyzes the synthesis of the second messenger cyclic GMP-AMP (cGAMP), which binds to the adapter protein MITA (also known as STING, MPYS, and ERIS) to initiate the innate immune response. How the binding of DNA to and the activation of cGAS are regulated remains poorly understood. Using a biochemical purification approach, we identified poly(rC)-binding protein 1 (PCBP1) as a cGAS-associated protein. PCBP1 was recruited to cGAS in a viral infection-dependent manner. PCBP1 directly bound to DNA and enhanced cGAS binding to its ligands, which was important for cGAS activation. Consistently, PCBP1 deficiency inhibited cytosolic DNA- and DNA virus-triggered transcription of downstream effector genes. These findings suggest that PCBP1 plays an important role in the cGAS-mediated innate immune response to DNA virus infection by promoting the binding of cGAS to viral DNA.
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Affiliation(s)
- Chen-Yang Liao
- grid.49470.3e0000 0001 2331 6153Department of Infectious Diseases, Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan University, 430071 Wuhan, China
| | - Cao-Qi Lei
- grid.49470.3e0000 0001 2331 6153Department of Infectious Diseases, Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan University, 430071 Wuhan, China
| | - Hong-Bing Shu
- grid.49470.3e0000 0001 2331 6153Department of Infectious Diseases, Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan University, 430071 Wuhan, China
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Upregulation of a novel LncRNA AC104958.2 stabilized by PCBP2 promotes proliferation and microvascular invasion in hepatocellular carcinoma. Exp Cell Res 2021; 407:112791. [PMID: 34418457 DOI: 10.1016/j.yexcr.2021.112791] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 08/16/2021] [Accepted: 08/17/2021] [Indexed: 12/20/2022]
Abstract
Long non-coding RNAs (lncRNAs) were reported to be involved in tumorigenesis and progression of hepatocellular carcinoma (HCC). Microvascular invasion (MVI) is an independent predictor for early recurrence and overall survival in postoperative patients with HCC. However, the mechanisms how lncRNAs affect HCC and MVI remain elusive. By RNA sequencing (RNA-seq) in a series of 65 HCC samples and 30 paired adjacent non-tumor liver tissue, we identified a novel lncRNA AC104958.2 that was significantly upregulated in HCC tissues and associated with MVI. Overexpression of AC104958.2 obviously elevated cell viability, metastasis, invasion and epithelial-mesenchymal transition (EMT), while knockout of AC104958.2 mediated by CRISPR/Cas9 technique showed the opposite effects. In addition, the interaction between AC104958.2 and Poly (rC) binding protein 2 (PCBP2) was identified by RNA pull down and mass spectrometry (MS), which was further validated by RNA immunoprecipitation (RIP). PCBP2 was also upregulated in HCC and associated with MVI. High expression of both AC104958.2 and PCBP2 was correlated with tumor size, TNM stage and MVI in HCC. Overexpression of PCBP2 greatly increased the cell viability, metastasis, invasion and EMT. Moreover, actinomycin D assay showed that overexpression of PCBP2 enhanced the RNA stability of AC104958.2. In conclusion, our study showed that a novel lncRNA AC104958.2 exerted oncogenic roles in HCC and might be a promising biomarker and therapeutic target.
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