1
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Boergeling Y, Brunotte L, Ludwig S. Dynamic phospho-modification of viral proteins as a crucial regulatory layer of influenza A virus replication and innate immune responses. Biol Chem 2021; 402:1493-1504. [PMID: 34062629 DOI: 10.1515/hsz-2021-0241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 05/18/2021] [Indexed: 02/07/2023]
Abstract
Influenza viruses are small RNA viruses with a genome of about 13 kb. Because of this limited coding capacity, viral proteins have evolved to fulfil multiple functions in the infected cell. This implies that there must be mechanisms allowing to dynamically direct protein action to a distinct activity in a spatio-temporal manner. Furthermore, viruses exploit many cellular processes, which also have to be dynamically regulated during the viral replication cycle. Phosphorylation and dephosphorylation of proteins are fundamental for the control of many cellular responses. There is accumulating evidence that this mechanism represents a so far underestimated level of regulation in influenza virus replication. Here, we focus on the current knowledge of dynamics of phospho-modifications in influenza virus replication and show recent examples of findings underlining the crucial role of phosphorylation in viral transport processes as well as activation and counteraction of the innate immune response.
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Affiliation(s)
- Yvonne Boergeling
- Institute of Virology and Interdisciplinary Center for Clinical Research (IZKF), Medical Faculty, University of Münster, Von-Esmarch-Str. 56, D-48149Münster, Germany
| | - Linda Brunotte
- Institute of Virology and Interdisciplinary Center for Clinical Research (IZKF), Medical Faculty, University of Münster, Von-Esmarch-Str. 56, D-48149Münster, Germany
| | - Stephan Ludwig
- Institute of Virology and Interdisciplinary Center for Clinical Research (IZKF), Medical Faculty, University of Münster, Von-Esmarch-Str. 56, D-48149Münster, Germany
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2
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Mohd-Kipli F, Claridge JK, Habjanič J, Jiang A, Schnell JR. Conformational triggers associated with influenza matrix protein 1 polymerization. J Biol Chem 2021; 296:100316. [PMID: 33516724 PMCID: PMC7949140 DOI: 10.1016/j.jbc.2021.100316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 12/28/2020] [Accepted: 01/19/2021] [Indexed: 11/26/2022] Open
Abstract
A central role for the influenza matrix protein 1 (M1) is to form a polymeric coat on the inner leaflet of the host membrane that ultimately provides shape and stability to the virion. M1 polymerizes upon binding membranes, but triggers for conversion of M1 from a water-soluble component of the nucleus and cytosol into an oligomer at the membrane surface are unknown. While full-length M1 is required for virus viability, the N-terminal domain (M1NT) retains membrane binding and pH-dependent oligomerization. We studied the structural plasticity and oligomerization of M1NT in solution using NMR spectroscopy. We show that the isolated domain can be induced by sterol-containing compounds to undergo a conformational change and self-associate in a pH-dependent manner consistent with the stacked dimer oligomeric interface. Surface-exposed residues at one of the stacked dimer interfaces are most sensitive to sterols. Several perturbed residues are at the interface between the N-terminal subdomains and are also perturbed by changes in pH. The effects of sterols appear to be indirect and most likely mediated by reduction in water activity. The local changes are centered on strictly conserved residues and consistent with a priming of the N-terminal domain for polymerization. We hypothesize that M1NT is sensitive to changes in the aqueous environment and that this sensitivity is part of a mechanism for restricting polymerization to the membrane surface. Structural models combined with information from chemical shift perturbations indicate mechanisms by which conformational changes can be transmitted from one polymerization interface to the other.
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Affiliation(s)
- Faiz Mohd-Kipli
- Department of Biochemistry, University of Oxford, Oxford, United Kingdom; Faculty of Science, Universiti Brunei Darussalam, Gadong, Brunei Darussalam
| | - Jolyon K Claridge
- Department of Biochemistry, University of Oxford, Oxford, United Kingdom
| | - Jelena Habjanič
- Department of Biochemistry, University of Oxford, Oxford, United Kingdom
| | - Alex Jiang
- Department of Biochemistry, University of Oxford, Oxford, United Kingdom
| | - Jason R Schnell
- Department of Biochemistry, University of Oxford, Oxford, United Kingdom.
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3
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Dawson AR, Wilson GM, Coon JJ, Mehle A. Post-Translation Regulation of Influenza Virus Replication. Annu Rev Virol 2020; 7:167-187. [DOI: 10.1146/annurev-virology-010320-070410] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Influenza virus exploits cellular factors to complete each step of viral replication. Yet, multiple host proteins actively block replication. Consequently, infection success depends on the relative speed and efficacy at which both the virus and host use their respective effectors. Post-translational modifications (PTMs) afford both the virus and the host means to readily adapt protein function without the need for new protein production. Here we use influenza virus to address concepts common to all viruses, reviewing how PTMs facilitate and thwart each step of the replication cycle. We also discuss advancements in proteomic methods that better characterize PTMs. Although some effectors and PTMs have clear pro- or antiviral functions, PTMs generally play regulatory roles to tune protein functions, levels, and localization. Synthesis of our current understanding reveals complex regulatory schemes where the effects of PTMs are time and context dependent as the virus and host battle to control infection.
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Affiliation(s)
- Anthony R. Dawson
- Department of Medical Microbiology and Immunology, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - Gary M. Wilson
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - Joshua J. Coon
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
- Department of Biomolecular Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - Andrew Mehle
- Department of Medical Microbiology and Immunology, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
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4
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Xiong J, Cui BW, Wang N, Dai YT, Zhang H, Wang CF, Zhong HJ, Cheng S, Ou-Yang BS, Hu Y, Zhang X, Xu B, Qian WB, Tao R, Yan F, Hu JD, Hou M, Ma XJ, Wang X, Liu YH, Zhu ZM, Huang XB, Liu L, Wu CY, Huang L, Shen YF, Huang RB, Xu JY, Wang C, Wu DP, Yu L, Li JF, Xu PP, Wang L, Huang JY, Chen SJ, Zhao WL. Genomic and Transcriptomic Characterization of Natural Killer T Cell Lymphoma. Cancer Cell 2020; 37:403-419.e6. [PMID: 32183952 DOI: 10.1016/j.ccell.2020.02.005] [Citation(s) in RCA: 133] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 01/06/2020] [Accepted: 02/12/2020] [Indexed: 12/11/2022]
Abstract
Natural killer/T cell lymphoma (NKTCL) is an aggressive and heterogeneous entity of non-Hodgkin lymphoma, strongly associated with Epstein-Barr virus (EBV) infection. To identify molecular subtypes of NKTCL based on genomic structural alterations and EBV sequences, we performed multi-omics study on 128 biopsy samples of newly diagnosed NKTCL and defined three prominent subtypes, which differ significantly in cell of origin, EBV gene expression, transcriptional signatures, and responses to asparaginase-based regimens and targeted therapy. Our findings thus identify molecular networks of EBV-associated pathogenesis and suggest potential clinical strategies on NKTCL.
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Affiliation(s)
- Jie Xiong
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China
| | - Bo-Wen Cui
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China
| | - Nan Wang
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China
| | - Yu-Ting Dai
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China; School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Hao Zhang
- Department of Otolaryngology, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chao-Fu Wang
- Department of Pathology, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui-Juan Zhong
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China
| | - Shu Cheng
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China
| | - Bin-Shen Ou-Yang
- Department of Pathology, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu Hu
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xi Zhang
- Department of Hematology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Bin Xu
- Department of Hematology, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian, China
| | - Wen-Bin Qian
- Department of Hematology, The First Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Rong Tao
- Department of Hematology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Feng Yan
- Department of Hematology, The Third Affiliated Hospital of Suzhou University, The First People's Hospital of Changzhou, Changzhou, People's Republic of China
| | - Jian-Da Hu
- Fujian Institute of Hematology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Ming Hou
- Department of Hematology, Qilu Hospital of Shandong University, Jinan, China
| | - Xue-Jun Ma
- Department of Medical Oncology, Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Xin Wang
- Department of Hematology, Shandong Province Hospital of Shandong University, Jinan, China
| | - Yuan-Hua Liu
- Department of Medical Oncology, Jiangsu Cancer Hospital, Nanjing, China
| | - Zun-Min Zhu
- Department of Hematology, Henan Province People's Hospital, Zhengzhou, China
| | - Xiao-Bin Huang
- Department of Hematology, Sichuan Provincial People's Hospital, Chengdu, China
| | - Li Liu
- Department of Hematology, Tangdu Hospital, The Fourth Military Medical University, Xi'an, China
| | - Chong-Yang Wu
- Department of Hematology, Lanzhou University Second Hospital, Lanzhou, Gansu, China
| | - Li Huang
- Department of Oncology and Hematology, Hospital (T.C.M) Affiliated to Southwest Medical University, Luzhou, China
| | - Yun-Feng Shen
- Department of Hematology, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi, China
| | - Rui-Bin Huang
- Department of Hematology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Jing-Yan Xu
- Department of Hematology, Nanjing Drum Tower Hospital, Nanjing, China
| | - Chun Wang
- Department of Hematology, Shanghai General Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - De-Pei Wu
- Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Li Yu
- Department of Hematology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Jian-Feng Li
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China
| | - Peng-Peng Xu
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China
| | - Li Wang
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China; Pôle de Recherches Sino-Français en Science du Vivant et Génomique, Laboratory of Molecular Pathology, Shanghai, China
| | - Jin-Yan Huang
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China.
| | - Sai-Juan Chen
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China; Pôle de Recherches Sino-Français en Science du Vivant et Génomique, Laboratory of Molecular Pathology, Shanghai, China.
| | - Wei-Li Zhao
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, National Research Center for Translational Medicine, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Rui Jin Er Road, Shanghai 200025, China; Pôle de Recherches Sino-Français en Science du Vivant et Génomique, Laboratory of Molecular Pathology, Shanghai, China.
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5
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Struzik J, Szulc-Dąbrowska L. Manipulation of Non-canonical NF-κB Signaling by Non-oncogenic Viruses. Arch Immunol Ther Exp (Warsz) 2018; 67:41-48. [PMID: 30196473 PMCID: PMC6433803 DOI: 10.1007/s00005-018-0522-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 06/19/2018] [Indexed: 02/07/2023]
Abstract
Nuclear factor (NF)-κB is a major regulator of antiviral response. Viral pathogens exploit NF-κB activation pathways to avoid cellular mechanisms that eliminate the infection. Canonical (classical) NF-κB signaling, which regulates innate immune response, cell survival and inflammation, is often manipulated by viral pathogens that can counteract antiviral response. Oncogenic viruses can modulate not only canonical, but also non-canonical (alternative) NF-κB activation pathways. The non-canonical NF-κB signaling is responsible for adaptive immunity and plays a role in lymphoid organogenesis, B cell development, as well as bone metabolism. Thus, non-canonical NF-κB activation has been linked to lymphoid malignancies. However, some data strongly suggest that the non-canonical NF-κB activation pathway may also function in innate immunity and is modulated by certain non-oncogenic viruses. Collectively, these findings show the importance of studying the impact of different groups of viral pathogens on alternative NF-κB activation. This mini-review focuses on the influence of non-oncogenic viruses on the components of non-canonical NF-κB signaling.
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Affiliation(s)
- Justyna Struzik
- Division of Immunology, Department of Preclinical Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences-SGGW, Ciszewskiego 8, 02-786, Warsaw, Poland.
| | - Lidia Szulc-Dąbrowska
- Division of Immunology, Department of Preclinical Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences-SGGW, Ciszewskiego 8, 02-786, Warsaw, Poland
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6
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Shibata T, Nerome K, Moriyama M, Hayakawa S, Kuroda K. Addition of an EGFP-tag to the N-terminal of influenza virus M1 protein impairs its ability to accumulate in ND10. J Virol Methods 2017; 252:75-79. [PMID: 29174083 DOI: 10.1016/j.jviromet.2017.11.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 11/10/2017] [Accepted: 11/19/2017] [Indexed: 02/07/2023]
Abstract
A previous report demonstrated that influenza virus infection induces accumulation of EGFP-tagged M1 protein (EGFP-M1) in the sub-nuclear domain ND10. Here, we show that the transfection of four viral protein (NP, PB2, PB1, PA) expression vectors and eight RNA segment expression vectors induced the formation of nuclear dots of EGFP-M1 as seen in virus infections. Omission of the segment 7 RNA expression vector, however, abolished the nuclear dots of EGFP-M1. This result suggests an essential role for authentic M1 protein and/or M2 protein, both of which are encoded in segment 7, in the formation of nuclear dots of EGFP-M1. Co-expression of M1 protein but not M2 protein with EGFP-M1 induced the formation of nuclear dots of EGFP-M1. The dots co-localized with PML protein, which is an indicator of ND10. When only M1 protein was expressed, immunostaining of M1 protein clearly revealed the nuclear dots and their colocalization with PML protein. These results demonstrate that the accumulation in ND10 is an intrinsic characteristic of M1 protein and EGFP addition abolishes this characteristic. The addition of EGFP to M1 protein induced a defect in M1 protein.
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Affiliation(s)
- Toshikatsu Shibata
- Division of Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, 30-1 Ohyaguchikami-machi, Itabashi-ku, Tokyo 173-8610, Japan
| | - Kuniaki Nerome
- The Institute of Biological Resources, 893-2, Nakayama, Nago, Okinawa 905-0004, Japan
| | - Mitsuhiko Moriyama
- Division of Gastroenterology and Hepatology, Department of Medicine, Nihon University School of Medicine, 30-1 Ohyaguchikami-machi, Itabashi-ku, Tokyo 173-8610, Japan
| | - Satoshi Hayakawa
- Division of Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, 30-1 Ohyaguchikami-machi, Itabashi-ku, Tokyo 173-8610, Japan
| | - Kazumichi Kuroda
- Division of Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, 30-1 Ohyaguchikami-machi, Itabashi-ku, Tokyo 173-8610, Japan.
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7
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Potter EA, Dolgova EV, Proskurina AS, Efremov YR, Minkevich AM, Rozanov AS, Peltek SE, Nikolin VP, Popova NA, Seledtsov IA, Molodtsov VV, Zavyalov EL, Taranov OS, Baiborodin SI, Ostanin AA, Chernykh ER, Kolchanov NA, Bogachev SS. Gene expression profiling of tumor-initiating stem cells from mouse Krebs-2 carcinoma using a novel marker of poorly differentiated cells. Oncotarget 2017; 8:9425-9441. [PMID: 28031533 PMCID: PMC5354742 DOI: 10.18632/oncotarget.14116] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 12/15/2016] [Indexed: 12/18/2022] Open
Abstract
Using the ability of poorly differentiated cells to natively internalize fragments of extracellular double-stranded DNA as a marker, we isolated a tumorigenic subpopulation present in Krebs-2 ascites that demonstrated the features of tumor-inducing cancer stem cells. Having combined TAMRA-labeled DNA probe and the power of RNA-seq technology, we identified a set of 168 genes specifically expressed in TAMRA-positive cells (tumor-initiating stem cells), these genes remaining silent in TAMRA-negative cancer cells. TAMRA+ cells displayed gene expression signatures characteristic of both stem cells and cancer cells. The observed expression differences between TAMRA+ and TAMRA- cells were validated by Real Time PCR. The results obtained corroborated the biological data that TAMRA+ murine Krebs-2 tumor cells are tumor-initiating stem cells. The approach developed can be applied to profile any poorly differentiated cell types that are capable of immanent internalization of double-stranded DNA.
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Affiliation(s)
- Ekaterina A. Potter
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Evgenia V. Dolgova
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Anastasia S. Proskurina
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Yaroslav R. Efremov
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Alexandra M. Minkevich
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Aleksey S. Rozanov
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Sergey E. Peltek
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Valeriy P. Nikolin
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Nelly A. Popova
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | | | - Vladimir V. Molodtsov
- Novosibirsk State University, Novosibirsk 630090, Russia
- Softberry Inc., New York 10549, USA
| | - Evgeniy L Zavyalov
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Oleg S. Taranov
- The State Research Center of Virology and Biotechnology VECTOR, Koltsovo, Novosibirsk 630559, Russia
| | - Sergey I. Baiborodin
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Alexander A. Ostanin
- Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk 630099, Russia
| | - Elena R. Chernykh
- Institute of Clinical Immunology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk 630099, Russia
| | - Nikolay A. Kolchanov
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Sergey S. Bogachev
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
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8
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Phosphorylation of Single Stranded RNA Virus Proteins and Potential for Novel Therapeutic Strategies. Viruses 2015; 7:5257-73. [PMID: 26473910 PMCID: PMC4632380 DOI: 10.3390/v7102872] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 09/23/2015] [Accepted: 09/29/2015] [Indexed: 12/31/2022] Open
Abstract
Post translational modification of proteins is a critical requirement that regulates function. Among the diverse kinds of protein post translational modifications, phosphorylation plays essential roles in protein folding, protein:protein interactions, signal transduction, intracellular localization, transcription regulation, cell cycle progression, survival and apoptosis. Protein phosphorylation is also essential for many intracellular pathogens to establish a productive infection cycle. Preservation of protein phosphorylation moieties in pathogens in a manner that mirrors the host components underscores the co-evolutionary trajectory of pathogens and hosts, and sheds light on how successful pathogens have usurped, either in part or as a whole, the host enzymatic machinery. Phosphorylation of viral proteins for many acute RNA viruses including Flaviviruses and Alphaviruses has been demonstrated to be critical for protein functionality. This review focuses on phosphorylation modifications that have been documented to occur on viral proteins with emphasis on acutely infectious, single stranded RNA viruses. The review additionally explores the possibility of repurposing Food and Drug Administration (FDA) approved inhibitors as antivirals for the treatment of acute RNA viral infections.
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9
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A Single Amino Acid in the M1 Protein Responsible for the Different Pathogenic Potentials of H5N1 Highly Pathogenic Avian Influenza Virus Strains. PLoS One 2015; 10:e0137989. [PMID: 26368015 PMCID: PMC4569272 DOI: 10.1371/journal.pone.0137989] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 08/24/2015] [Indexed: 12/21/2022] Open
Abstract
Two highly pathogenic avian influenza virus strains, A/duck/Hokkaido/WZ83/2010 (H5N1) (WZ83) and A/duck/Hokkaido/WZ101/2010 (H5N1) (WZ101), which were isolated from wild ducks in Japan, were found to be genetically similar, with only two amino acid differences in their M1 and PB1 proteins at positions 43 and 317, respectively. We found that both WZ83 and WZ101 caused lethal infection in chickens but WZ101 killed them more rapidly than WZ83. Interestingly, ducks experimentally infected with WZ83 showed no or only mild clinical symptoms, whereas WZ101 was highly lethal. We then generated reassortants between these viruses and found that exchange of the M gene segment completely switched the pathogenic phenotype in both chickens and ducks, indicating that the difference in the pathogenicity for these avian species between WZ83 and WZ101 was determined by only a single amino acid in the M1 protein. It was also found that WZ101 showed higher pathogenicity than WZ83 in mice and that WZ83, whose M gene was replaced with that of WZ101, showed higher pathogenicity than wild-type WZ83, although this reassortant virus was not fully pathogenic compared to wild-type WZ101. These results suggest that the amino acid at position 43 of the M1 protein is one of the factors contributing to the pathogenicity of H5N1 highly pathogenic avian influenza viruses in both avian and mammalian hosts.
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10
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Nucleocytoplasmic shuttling of influenza A virus proteins. Viruses 2015; 7:2668-82. [PMID: 26008706 PMCID: PMC4452925 DOI: 10.3390/v7052668] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 05/20/2015] [Indexed: 12/31/2022] Open
Abstract
Influenza viruses transcribe and replicate their genomes in the nuclei of infected host cells. The viral ribonucleoprotein (vRNP) complex of influenza virus is the essential genetic unit of the virus. The viral proteins play important roles in multiple processes, including virus structural maintenance, mediating nucleocytoplasmic shuttling of the vRNP complex, virus particle assembly, and budding. Nucleocytoplasmic shuttling of viral proteins occurs throughout the entire virus life cycle. This review mainly focuses on matrix protein (M1), nucleoprotein (NP), nonstructural protein (NS1), and nuclear export protein (NEP), summarizing the mechanisms of their nucleocytoplasmic shuttling and the regulation of virus replication through their phosphorylation to further understand the regulation of nucleocytoplasmic shuttling in host adaptation of the viruses.
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11
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Sellinger M, Xu W, Pathil A, Stremmel W, Chamulitrat W. Ursodeoxycholyl lysophosphatidylethanolamide inhibits cholestasis- and hypoxia-induced apoptosis by upregulating antiapoptosis proteins. Exp Biol Med (Maywood) 2014; 240:252-60. [PMID: 25125499 DOI: 10.1177/1535370214547157] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
An increase of toxic bile acids such as glycochenodeoxycholic acid occurs during warm ischemia reperfusion causing cholestasis and damage in hepatocytes and intrahepatic biliary epithelial cells. We aim to test antiapoptosis effects of ursodeoxycholyl lysophosphatidylethanolamide under cholestatic induction by glycochenodeoxycholic acid treatment of mouse hepatocytes and hypoxia induction by cobalt chloride treatment of intrahepatic biliary epithelial cancer Mz-ChA-1cell line. Such treatments caused marked increases in apoptosis as evidenced by activation of caspase 3, caspase 8 and poly (ADP-ribose) polymerase-1. Co-treatment with ursodeoxycholyl lysophosphatidylethanolamide significantly inhibited these increases. Interestingly, ursodeoxycholyl lysophosphatidylethanolamide was able to increase expression of antiapoptotic cellular FLICE-inhibitory protein in both cell types. Ursodeoxycholyl lysophosphatidylethanolamide also prevented the decreases of myeloid cell leukemia sequence-1 protein in both experimental systems, and this protection was due to ursodeoxycholyl lysophosphatidylethanolamide's ability to inhibit ubiquitination-mediated degradation of myeloid cell leukemia sequence-1, and to increase the phosphorylation of GSK-3β. In addition, ursodeoxycholyl lysophosphatidylethanolamide was able to prevent the decreased expression of another antiapoptotic cellular inhibitor of apoptosis 2 in cobalt chloride-treated Mz-ChA-1 cells. Hence, ursodeoxycholyl lysophosphatidylethanolamide mediated cytoprotection against apoptosis during toxic bile-acid and ischemic stresses by a mechanism involving accumulation of cellular FLICE-inhibitory protein, myeloid cell leukemia sequence-1 and cellular inhibitor of apoptosis 2 proteins. Ursodeoxycholyl lysophosphatidylethanolamide may thus be used as an agent to prevent hepatic ischemia reperfusion.
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Affiliation(s)
- Myra Sellinger
- Department of Internal Medicine IV, Gastroenterology and Infectious Diseases, University Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Weihong Xu
- Department of Internal Medicine IV, Gastroenterology and Infectious Diseases, University Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Anita Pathil
- Department of Internal Medicine IV, Gastroenterology and Infectious Diseases, University Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Wolfgang Stremmel
- Department of Internal Medicine IV, Gastroenterology and Infectious Diseases, University Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Walee Chamulitrat
- Department of Internal Medicine IV, Gastroenterology and Infectious Diseases, University Heidelberg Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
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Netsawang J, Panaampon J, Khunchai S, Kooptiwut S, Nagila A, Puttikhunt C, Yenchitsomanus PT, Limjindaporn T. Dengue virus disrupts Daxx and NF-κB interaction to induce CD137-mediated apoptosis. Biochem Biophys Res Commun 2014; 450:1485-91. [PMID: 25019989 DOI: 10.1016/j.bbrc.2014.07.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 07/03/2014] [Indexed: 10/25/2022]
Abstract
Dengue virus (DENV) is a positive-strand RNA virus of the Flavivirus family with 4 different serotypes. Clinical manifestations of DENV infection include dengue fever, dengue hemorrhagic fever, and dengue shock syndrome. Following DENV infection, apoptosis of hepatic cells is observed both in vitro and in vivo. However, the molecular mechanisms revealing how viral components affect cellular apoptosis remain unclear. In the present study, the role of death domain-associated protein 6 (Daxx) in DENV-mediated apoptosis was characterized by RNA interference and overexpression studies, and the anti-apoptotic function of Daxx during DENV infection was identified. Furthermore, the viral component, DENV capsid protein (DENV C), interacted with Daxx to disrupt interaction between Daxx and NF-κB. The liberated NF-κB activated the promoter of CD137, which is a member of the TNF family, and is previously shown to induce apoptosis during DENV infection. In summary, DENV C disrupts Daxx and NF-κB interaction to induce CD137-mediated apoptosis during DENV infection.
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Affiliation(s)
- Janjuree Netsawang
- Faculty of Medical Technology, Rangsit University, Phathum Thani, Thailand
| | - Jutatip Panaampon
- Division of Molecular Medicine, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand; Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Sasiprapa Khunchai
- Division of Molecular Medicine, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Suwattanee Kooptiwut
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Amar Nagila
- Division of Molecular Medicine, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chunya Puttikhunt
- Medical Biotechnology Unit, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Thailand
| | - Pa-Thai Yenchitsomanus
- Division of Molecular Medicine, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Thawornchai Limjindaporn
- Division of Molecular Medicine, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand; Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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Bao S, Zhou X, Zhang L, Zhou J, To KKW, Wang B, Wang L, Zhang X, Song YQ. Prioritizing genes responsible for host resistance to influenza using network approaches. BMC Genomics 2013; 14:816. [PMID: 24261899 PMCID: PMC4046670 DOI: 10.1186/1471-2164-14-816] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Accepted: 11/06/2013] [Indexed: 01/17/2023] Open
Abstract
Background The genetic make-up of humans and other mammals (such as mice) affects their resistance to influenza virus infection. Considering the complexity and moral issues associated with experiments on human subjects, we have only acquired partial knowledge regarding the underlying molecular mechanisms. Although influenza resistance in inbred mice has been mapped to several quantitative trait loci (QTLs), which have greatly narrowed down the search for host resistance genes, only few underlying genes have been identified. Results To prioritize a list of promising candidates for future functional investigation, we applied network-based approaches to leverage the information of known resistance genes and the expression profiles contrasting susceptible and resistant mouse strains. The significance of top-ranked genes was supported by different lines of evidence from independent genetic associations, QTL studies, RNA interference (RNAi) screenings, and gene expression analysis. Further data mining on the prioritized genes revealed the functions of two pathways mediated by tumor necrosis factor (TNF): apoptosis and TNF receptor-2 signaling pathways. We suggested that the delicate balance between TNF’s pro-survival and apoptotic effects may affect hosts’ conditions after influenza virus infection. Conclusions This study considerably cuts down the list of candidate genes responsible for host resistance to influenza and proposed novel pathways and mechanisms. Our study also demonstrated the efficacy of network-based methods in prioritizing genes for complex traits. Electronic supplementary material The online version of this article (doi:10.1186/1471-2164-14-816) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | | | | | | | | | | | | | | | - You-Qiang Song
- Department of Biochemistry, The University of Hong Kong, Hong Kong, China.
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Abstract
Cellular FLICE (FADD-like IL-1β-converting enzyme)-inhibitory protein (c-FLIP) is a major antiapoptotic protein and an important cytokine and chemotherapy resistance factor that suppresses cytokine- and chemotherapy-induced apoptosis. c-FLIP is expressed as long (c-FLIPL), short (c-FLIPS), and c-FLIPR splice variants in human cells. c-FLIP binds to FADD and/or caspase-8 or -10 and TRAIL receptor 5 (DR5). This interaction in turn prevents Death-Inducing Signaling Complex (DISC) formation and subsequent activation of the caspase cascade. c-FLIPL and c-FLIPS are also known to have multifunctional roles in various signaling pathways, as well as activating and/or upregulating several cytoprotective and pro-survival signaling proteins including Akt, ERK, and NF-κB. In addition to its role in apoptosis, c-FLIP is involved in programmed necroptosis (necrosis) and autophagy. Necroptosis is regulated by the Ripoptosome, which is a signaling intracellular cell death platform complex. The Ripoptosome contains receptor-interacting protein-1/Receptor-Interacting Protein-3 (RIP1), caspase-8, caspase-10, FADD, and c-FLIP isoforms involved in switching apoptotic and necroptotic cell death. c-FLIP regulates the Ripoptosome; in addition to its role in apoptosis, it is therefore also involved in necrosis. c-FLIPL attenuates autophagy by direct acting on the autophagy machinery by competing with Atg3 binding to LC3, thereby decreasing LC3 processing and inhibiting autophagosome formation. Upregulation of c-FLIP has been found in various tumor types, and its silencing has been shown to restore apoptosis triggered by cytokines and various chemotherapeutic agents. Hence, c-FLIP is an important target for cancer therapy. This review focuses on (1) the anti-apoptotic role of c-FLIP splice variants in preventing apoptosis and inducing cytokine and chemotherapy drug resistance, as well as its roles in necrosis and autophagy, and (2) modulation of c-FLIP expression as a means to enhance apoptosis and modulate necrosis and autophagy in cancer cells.
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Affiliation(s)
- Ahmad R Safa
- Department of Pharmacology & Toxicology, Indiana University School of Medicine, IN 46202, USA ; Indiana University Simon Cancer Center, Indiana University School of Medicine, IN 46202, USA
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