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Wang T, Zhao D, Zhang Y, Yu D, Liu G, Zhang K. Annexin A2: A Double-Edged Sword in Pathogen Infection. Pathogens 2024; 13:564. [PMID: 39057791 PMCID: PMC11279864 DOI: 10.3390/pathogens13070564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 06/23/2024] [Accepted: 06/28/2024] [Indexed: 07/28/2024] Open
Abstract
Annexin A2 (ANXA2) is a multifunctional calcium- and phospholipid-binding protein that plays an important role in various cells. During pathogen infections, ANXA2 modulates the nuclear factor kappa-B (NF-κB) and cell apoptosis signaling pathways and guides the chemotaxis of inflammatory cells toward inflammation sites, thereby protecting the host organism through the modulation of the inflammatory response. In addition, ANXA2 can regulate immune responses, and in certain pathogen infections, it can interact with pathogen proteins to facilitate their invasion and proliferation. This review provides an overview of the research progress on how ANXA2 regulates pathogen infections.
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Affiliation(s)
- Tianyu Wang
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan 528225, China
- College of Animal Science and Technology, Yangtze University, Jingzhou 434023, China
| | - Dengshuai Zhao
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan 528225, China
| | - Yuanhang Zhang
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan 528225, China
| | - Dixi Yu
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan 528225, China
| | - Guoping Liu
- College of Animal Science and Technology, Yangtze University, Jingzhou 434023, China
| | - Keshan Zhang
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan 528225, China
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2
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Ahmed AE, Abol-Enein H, El-Morsi AA, El-Hefnawy AS, Elsayed AA, Khater S, Hashem A, Zekri ARN, Haroun SA, Shokeir AA, Awadalla A. Association between hepatitis C virus genotype 4 and renal cell carcinoma: Molecular and virological studies. J Basic Microbiol 2024; 64:e2300279. [PMID: 38616711 DOI: 10.1002/jobm.202300279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 01/14/2024] [Accepted: 02/10/2024] [Indexed: 04/16/2024]
Abstract
Hepatitis C virus (HCV) is the most common infection worldwide. The correlation between HCV and renal cell carcinoma (RCC) is still mysterious. Therefore, the relationship between HCV and RCC was investigated. The study included 100 patients with RCC; 32 with HCV infection, and 68 without HCV infection. Expressions of viral proteins (NS3 and NS5A) were tested using an immune electron-microscope (IEM) and immunohistochemistry (IHC). IHC and quantitative real time-PCR investigated the presentation of human proteins TP53 and p21 genes. Transmission electron (TEM) detected viral-like particles in infected RCC tissues. The gene and protein expression of P53 was higher in HCV positive versus HCV negative patients and p21 was lower in HCV positive versus HCV negative in both tumor and normal tissue samples. Viral like particles were observed by TEM in the infected tumor and normal portion of the RCC tissues and the plasma samples. The IEM showed the depositions of NS3 and NS5A in infected renal tissues, while in noninfected samples, were not observed. The study hypothesizes that a correlation between HCV and RCC could exist through successfully detecting HCV-like particles, HCV proteins, and (p53 and p21) in RCC-infected patients.
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Affiliation(s)
- Asmaa E Ahmed
- Center of Excellence for Genome and Cancer Research, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
- Genetics Research Unit, Faculty of Medicine, Delta University for Science and Technology, Gamasa, Egypt
| | - Hassan Abol-Enein
- Center of Excellence for Genome and Cancer Research, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
| | - Adel A El-Morsi
- Department of Botany Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Ahmed S El-Hefnawy
- Center of Excellence for Genome and Cancer Research, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
| | - Ashraf A Elsayed
- Department of Botany Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Sherry Khater
- Center of Excellence for Genome and Cancer Research, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
| | - Abdelwahab Hashem
- Center of Excellence for Genome and Cancer Research, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
| | - Abdel-Rahman N Zekri
- Virology and Immunology Unit, Cancer Biology Department, National Cancer Institute, Cairo University, Fom El-Khalig, Cairo, Egypt
| | - Samia A Haroun
- Department of Botany Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Ahmed A Shokeir
- Center of Excellence for Genome and Cancer Research, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
| | - Amira Awadalla
- Center of Excellence for Genome and Cancer Research, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
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3
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Huang Y, Peng Q, Tian X, Chen C, Zhu X, Huang C, Huo Z, Liu Y, Yang C, Liu C, Zhang P. Nuclear membrane protein SUN2 promotes replication of flaviviruses through modulating cytoskeleton reorganization mediated by NS1. Nat Commun 2024; 15:296. [PMID: 38177122 PMCID: PMC10766649 DOI: 10.1038/s41467-023-44580-6] [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: 04/18/2023] [Accepted: 12/18/2023] [Indexed: 01/06/2024] Open
Abstract
Cytoskeleton is extensively recruited by flaviviruses for their infection. In this study, we uncovered an essential role of a nuclear membrane protein, SAD1/UNC84 domain protein 2 (SUN2) linking cytoskeleton and nucleoskeleton in the flavivirus replication. CRISPR/Cas9-mediated knockout of SUN2, but not SUN1, significantly reduces the replication of Zika virus (ZIKV), dengue virus (DENV), and Japanese encephalitis virus (JEV). In contrast, SUN2 does not affect the infection of non-flaviviridae RNA viruses. All three regions of SUN2 are required for its proviral effect. Mechanistically, SUN2 facilitates rearrangement of cytoskeleton and formation of replication organelles induced by viral infection, and hence promotes viral RNA synthesis. SUN2 is required for the interaction between cytoskeleton actin and ZIKV nonstructural protein 1 (NS1). Expression of dominant negative Nesprin-1 and Nesprin-2, which connect SUN2 to cytoskeleton proteins, alleviates the interaction between actin and NS1 and reduces viral replication levels. In a neonatal mouse infection model, SUN2 knockout dramatically alleviates the in vivo ZIKV replication and development of neuropathology. This work elucidates that recruitment of cytoskeleton proteins by flavivirus is coordinated by nuclear membrane proteins SUN2 and Nesprins, providing evidence for a link between nuclear membrane proteins and flavivirus infection.
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Affiliation(s)
- Yanxia Huang
- Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou, China
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
- Department of Neurosurgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China
| | - Qinyu Peng
- Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou, China
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xu Tian
- Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou, China
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Cancan Chen
- Department of Pathology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China
| | - Xuanfeng Zhu
- Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou, China
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Changbai Huang
- Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou, China
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Zhiting Huo
- Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou, China
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Yang Liu
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Chao Yang
- Department of Neurosurgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China.
- Department of Neurosurgery, Guangxi Hospital Division of The First Affiliated Hospital, Sun Yat-sen University, Guangxi, China.
| | - Chao Liu
- Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou, China.
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.
| | - Ping Zhang
- Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou, China.
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.
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4
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da Silva ES, Naghavi MH. Microtubules and viral infection. Adv Virus Res 2023; 115:87-134. [PMID: 37173066 DOI: 10.1016/bs.aivir.2023.02.003] [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] [Indexed: 04/05/2023]
Abstract
Microtubules (MTs) form rapidly adaptable, complex intracellular networks of filaments that not only provide structural support, but also form the tracks along which motors traffic macromolecular cargos to specific sub-cellular sites. These dynamic arrays play a central role in regulating various cellular processes including cell shape and motility as well as cell division and polarization. Given their complex organization and functional importance, MT arrays are carefully controlled by many highly specialized proteins that regulate the nucleation of MT filaments at distinct sites, their dynamic growth and stability, and their engagement with other subcellular structures and cargoes destined for transport. This review focuses on recent advances in our understanding of how MTs and their regulatory proteins function, including their active targeting and exploitation, during infection by viruses that utilize a wide variety of replication strategies that occur within different cellular sub-compartments or regions of the cell.
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Affiliation(s)
- Eveline Santos da Silva
- Department of Microbiology-Immunology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States; HIV Clinical and Translational Research, Luxembourg Institute of Health, Department of Infection and Immunity, Esch-sur-Alzette, Luxembourg
| | - Mojgan H Naghavi
- Department of Microbiology-Immunology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States.
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5
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Liu X, Wang L, Liang CH, Lu YP, Yang T, Zhang X. An enhanced methodology for predicting protein-protein interactions between human and hepatitis C virus via ensemble learning algorithms. J Biomol Struct Dyn 2022; 40:10592-10602. [PMID: 34251992 DOI: 10.1080/07391102.2021.1946429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Hepatitis C virus (HCV) is responsible for a variety of human life-threatening diseases, which include liver cirrhosis, chronic hepatitis, fibrosis and hepatocellular carcinoma (HCC) . Computational study of protein-protein interactions between human and HCV could boost the findings of antiviral drugs in HCV therapy and might optimize the treatment procedures for HCV infections. In this analysis, we constructed a prediction model for protein-protein interactions between HCV and human by incorporating the features generated by pseudo amino acid compositions, which were then carried out at two levels: categories and features. In brief, extra-tree was initially used for feature selection while SVM was then used to build the classification model. After that, the most suitable models for each category and each feature were selected by comparing with the three ensemble learning algorithms, that is, Random Forest, Adaboost, and Xgboost. According to our results, profile-based features were more suitable for building predictive models among the four categories. AUC value of the model constructed by Xgboost algorithm on independent data set could reach 92.66%. Moreover, Distance-based Residue, Physicochemical Distance Transformation and Profile-based Physicochemical Distance Transformation performed much better among the 17 features. AUC value of the Adaboost classifier constructed by Profile-based Physicochemical Distance Transformation on the independent dataset achieved 93.74%. Taken together, we proposed a better model with improved prediction capacity for protein-protein interactions between human and HCV in this study, which could provide practical reference for further experimental investigation into HCV-related diseases in future.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Xin Liu
- Department of Bioinformatics, School of Medical Informatics and Engineering, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Liang Wang
- Department of Bioinformatics, School of Medical Informatics and Engineering, Xuzhou Medical University, Xuzhou, Jiangsu, China.,Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Cheng-Hao Liang
- School of Life Science, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Ya-Ping Lu
- College of Computer Science and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Ting Yang
- Department of Bioinformatics, School of Medical Informatics and Engineering, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Xiao Zhang
- Department of Bioinformatics, School of Medical Informatics and Engineering, Xuzhou Medical University, Xuzhou, Jiangsu, China
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6
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Seo D, Gammon DB. Manipulation of Host Microtubule Networks by Viral Microtubule-Associated Proteins. Viruses 2022; 14:v14050979. [PMID: 35632720 PMCID: PMC9147350 DOI: 10.3390/v14050979] [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: 03/27/2022] [Revised: 05/03/2022] [Accepted: 05/04/2022] [Indexed: 12/19/2022] Open
Abstract
Diverse DNA and RNA viruses utilize cytoskeletal networks to efficiently enter, replicate, and exit the host cell, while evading host immune responses. It is well established that the microtubule (MT) network is commonly hijacked by viruses to traffic to sites of replication after entry and to promote egress from the cell. However, mounting evidence suggests that the MT network is also a key regulator of host immune responses to infection. At the same time, viruses have acquired mechanisms to manipulate and/or usurp MT networks to evade these immune responses. Central to most interactions of viruses with the MT network are virally encoded microtubule-associated proteins (MAPs) that bind to MTs directly or indirectly. These MAPs associate with MTs and other viral or cellular MAPs to regulate various aspects of the MT network, including MT dynamics, MT-dependent transport via motor proteins such as kinesins and dyneins, and MT-dependent regulation of innate immune responses. In this review, we examine how viral MAP interactions with the MT network facilitate viral replication and immune evasion.
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7
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Zhang J, Li H, Lin B, Luo X, Yin P, Yi T, Xue B, Zhang XL, Zhu H, Nie Z. Development of Near-Infrared Nucleic Acid Mimics of Fluorescent Proteins for In Vivo Imaging of Viral RNA with Turn-On Fluorescence. J Am Chem Soc 2021; 143:19317-19329. [PMID: 34762804 DOI: 10.1021/jacs.1c04577] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
GFP-like fluorescent proteins and their molecular mimics have revolutionized bioimaging research, but their emissions are largely limited in the visible to far-red region, hampering the in vivo applications in intact animals. Herein, we structurally modulate GFP-like chromophores using a donor-acceptor-acceptor (D-A-A') molecular configuration to discover a set of novel fluorogenic derivatives with infrared-shifted spectra. These chromophores can be fluorescently elicited by their specific interaction with G-quadruplex (G4), a unique noncanonical nucleic acid secondary structure, via inhibition of the chromophores' twisted-intramolecular charge transfer. This feature allows us to create, for the first time, FP mimics with tunable emission in the near-infrared (NIR) region (Emmax = 664-705 nm), namely, infrared G-quadruplex mimics of FPs (igMFP). Compared with their FP counterparts, igMFPs exhibit remarkably higher quantum yields, larger Stokes shift, and better photostability. In a proof-of-concept application using pathogen-related G4s as the target, we exploited igMFPs to directly visualize native hepatitis C virus (HCV) RNA genome in living cells via their in situ formation by the chromophore-bound viral G4 structure in the HCV core gene. Furthermore, igMFPs are capable of high contrast HCV RNA imaging in living mice bearing a HCV RNA-presenting mini-organ, providing the first application of FP mimics in whole-animal imaging.
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Affiliation(s)
- Jiaheng Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, Hunan University, Changsha 410082, People's Republic of China
| | - Huiyi Li
- Institute of Pathogen Biology and Immunology of College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, People's Republic of China
| | - Bin Lin
- Pharmaceutical Engineering & Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Xingyu Luo
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, Hunan University, Changsha 410082, People's Republic of China
| | - Peng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, Hunan University, Changsha 410082, People's Republic of China
| | - Ting Yi
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, Hunan University, Changsha 410082, People's Republic of China
| | - Binbin Xue
- Institute of Pathogen Biology and Immunology of College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, People's Republic of China
| | - Xiao-Lian Zhang
- State Key Laboratory of Virology and Hubei Province Key Laboratory of Allergy and Immunology and Department of Immunology, School of Medicine, Wuhan University, Wuhan 430071, Hubei, People's Republic of China
| | - Haizhen Zhu
- Institute of Pathogen Biology and Immunology of College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, People's Republic of China
| | - Zhou Nie
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, Hunan University, Changsha 410082, People's Republic of China
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8
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Fiorino S, Gallo C, Zippi M, Sabbatani S, Manfredi R, Moretti R, Fogacci E, Maggioli C, Travasoni Loffredo F, Giampieri E, Corazza I, Dickmans C, Denitto C, Cammarosano M, Battilana M, Orlandi PE, Del Forno F, Miceli F, Visani M, Acquaviva G, De Leo A, Leandri P, Hong W, Brand T, Tallini G, Jovine E, Jovine R, de Biase D. Cytokine storm in aged people with CoV-2: possible role of vitamins as therapy or preventive strategy. Aging Clin Exp Res 2020; 32:2115-2131. [PMID: 32865757 PMCID: PMC7456763 DOI: 10.1007/s40520-020-01669-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 07/21/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND In December 2019, a novel human-infecting coronavirus, SARS-CoV-2, had emerged. The WHO has classified the epidemic as a "public health emergency of international concern". A dramatic situation has unfolded with thousands of deaths, occurring mainly in the aged and very ill people. Epidemiological studies suggest that immune system function is impaired in elderly individuals and these subjects often present a deficiency in fat-soluble and hydrosoluble vitamins. METHODS We searched for reviews describing the characteristics of autoimmune diseases and the available therapeutic protocols for their treatment. We set them as a paradigm with the purpose to uncover common pathogenetic mechanisms between these pathological conditions and SARS-CoV-2 infection. Furthermore, we searched for studies describing the possible efficacy of vitamins A, D, E, and C in improving the immune system function. RESULTS SARS-CoV-2 infection induces strong immune system dysfunction characterized by the development of an intense proinflammatory response in the host, and the development of a life-threatening condition defined as cytokine release syndrome (CRS). This leads to acute respiratory syndrome (ARDS), mainly in aged people. High mortality and lethality rates have been observed in elderly subjects with CoV-2-related infection. CONCLUSIONS Vitamins may shift the proinflammatory Th17-mediated immune response arising in autoimmune diseases towards a T-cell regulatory phenotype. This review discusses the possible activity of vitamins A, D, E, and C in restoring normal antiviral immune system function and the potential therapeutic role of these micronutrients as part of a therapeutic strategy against SARS-CoV-2 infection.
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Affiliation(s)
- Sirio Fiorino
- UO of Internal Medicine Unit, Hospital of Budrio, Via Benni 44, 40065, Budrio, Bologna, Italy.
- Internal Medicine Unit, Maggiore Hospital of Bologna, Bologna, Italy.
| | - Claudio Gallo
- Physician Specialist in Infectious Diseases, AUSL Bologna, Bologna, Italy
| | - Maddalena Zippi
- Unit of Gastroenterology and Digestive Endoscopy, Sandro Petrini Hospital, Rome, Italy
| | | | | | - Renzo Moretti
- UO of Internal Medicine Unit, Hospital of Budrio, Via Benni 44, 40065, Budrio, Bologna, Italy
| | - Elisa Fogacci
- UO of Internal Medicine Unit, Hospital of Budrio, Via Benni 44, 40065, Budrio, Bologna, Italy
| | - Caterina Maggioli
- UO of Internal Medicine Unit, Hospital of Budrio, Via Benni 44, 40065, Budrio, Bologna, Italy
| | | | - Enrico Giampieri
- Experimental, Diagnostic and Specialty Medicine Department, University of Bologna, Bologna, Italy
| | - Ivan Corazza
- Experimental, Diagnostic and Specialty Medicine Department, University of Bologna, Bologna, Italy
| | - Christoph Dickmans
- UO of Internal Medicine Unit, Hospital of Budrio, Via Benni 44, 40065, Budrio, Bologna, Italy
| | - Claudio Denitto
- UO of Internal Medicine Unit, Hospital of Budrio, Via Benni 44, 40065, Budrio, Bologna, Italy
| | - Michele Cammarosano
- UO of Internal Medicine Unit, Hospital of Budrio, Via Benni 44, 40065, Budrio, Bologna, Italy
| | - Michele Battilana
- UO of Internal Medicine Unit, Hospital of Budrio, Via Benni 44, 40065, Budrio, Bologna, Italy
| | | | | | - Francesco Miceli
- UO Farmacia Centralizzata OM, Farmacia Ospedale Di Budrio, Budrio, Bologna, Italy
| | - Michela Visani
- Department of Pharmacy and Biotechnology (FABIT), University of Bologna, Bologna, Italy
- Department of Medicine (Dipartimento di Medicina Specialistica, Diagnostica e Sperimentale), Molecular Diagnostic Unit, University of Bologna, Azienda USL di Bologna, Bologna, Italy
| | - Giorgia Acquaviva
- Department of Medicine (Dipartimento di Medicina Specialistica, Diagnostica e Sperimentale), Molecular Diagnostic Unit, University of Bologna, Azienda USL di Bologna, Bologna, Italy
| | - Antonio De Leo
- Department of Medicine (Dipartimento di Medicina Specialistica, Diagnostica e Sperimentale), Molecular Diagnostic Unit, University of Bologna, Azienda USL di Bologna, Bologna, Italy
| | - Paolo Leandri
- Internal Medicine Unit, Maggiore Hospital of Bologna, Bologna, Italy
| | - Wandong Hong
- Department of Gastroenterology and Hepatology, First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, The People's Republic of China
| | - Thomas Brand
- Regenerative Medicine Center Utrecht, University of Utrecht, Utrecht, Netherlands
| | - Giovanni Tallini
- Department of Medicine (Dipartimento di Medicina Specialistica, Diagnostica e Sperimentale), Molecular Diagnostic Unit, University of Bologna, Azienda USL di Bologna, Bologna, Italy
| | - Elio Jovine
- Surgery Unit, Maggiore Hospital, Bologna, Italy
| | - Roberto Jovine
- Physical Medicine and Rehabilitation Unit, Maggiore Hospital, Bologna, Italy
| | - Dario de Biase
- Department of Pharmacy and Biotechnology (FABIT), University of Bologna, Bologna, Italy
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9
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Chen L, Li X, Wang H, Hou P, He H. Annexin A2 gene interacting with viral matrix protein to promote bovine ephemeral fever virus release. J Vet Sci 2020; 21:e33. [PMID: 32233139 PMCID: PMC7113574 DOI: 10.4142/jvs.2020.21.e33] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/11/2019] [Accepted: 12/30/2019] [Indexed: 12/15/2022] Open
Abstract
Bovine ephemeral fever virus (BEFV) causes bovine ephemeral fever, which can produce considerable economic damage to the cattle industry. However, there is limited experimental evidence regarding the underlying mechanisms of BEFV. Annexin A2 (AnxA2) is a calcium and lipid-conjugated protein that binds phospholipids and the cytoskeleton in a Ca2+-dependent manner, and it participates in various cellular functions, including vesicular trafficking, organization of membrane domains, and virus proliferation. The role of the AnxA2 gene during virus infection has not yet been reported. In this study, we observed that AnxA2 gene expression was up-regulated in BHK-21 cells infected with the virus. Additionally, overexpression of the AnxA2 gene promoted the release of mature virus particles, whereas BEFV replication was remarkably inhibited after reducing AnxA2 gene expression by using the small interfering RNA (siRNA). For viral proteins, overexpression of the Matrix (M) gene promotes the release of mature virus particles. Moreover, the AnxA2 protein interaction with the M protein of BEFV was confirmed by GST pull-down and co-immunoprecipitation assays. Experimental results indicate that the C-terminal domain (268-334 aa) of AxnA2 contributes to this interaction. An additional mechanistic study showed that AnxA2 protein interacts with M protein and mediates the localization of the M protein at the plasma membrane. Furthermore, the absence of the AnxA2-V domain could attenuate the effect of AnxA2 on BEFV replication. These findings can contribute to elucidating the regulation of BEFV replication and may have implications for antiviral strategy development.
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Affiliation(s)
- Lihui Chen
- Ruminant Diseases Research Center, College of Life Sciences, Shandong Normal University, Jinan 250014, China
| | - Xingyu Li
- Ruminant Diseases Research Center, College of Life Sciences, Shandong Normal University, Jinan 250014, China
| | - Hongmei Wang
- Ruminant Diseases Research Center, College of Life Sciences, Shandong Normal University, Jinan 250014, China.
| | - Peili Hou
- Ruminant Diseases Research Center, College of Life Sciences, Shandong Normal University, Jinan 250014, China.
| | - Hongbin He
- Ruminant Diseases Research Center, College of Life Sciences, Shandong Normal University, Jinan 250014, China.
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10
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Spiroplasma eriocheiris Enters Drosophila Schneider 2 Cells and Relies on Clathrin-Mediated Endocytosis and Macropinocytosis. Infect Immun 2019; 87:IAI.00233-19. [PMID: 31451616 DOI: 10.1128/iai.00233-19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 08/15/2019] [Indexed: 11/20/2022] Open
Abstract
Spiroplasma eriocheiris causes great economic losses in the crustacean aquaculture industry. However, the mechanism of S. eriocheiris infecting host cells has been poorly studied. We established a Spiroplasma-infected Drosophila Schneider 2 (S2) cell model and investigated its pathogenic mechanism. First, S. eriocheiris induced S2 cell apoptosis and necrosis, seriously decreased cell viability, and increased the production of intracellular reactive oxygen species. Further research showed that S. eriocheiris can invade S2 cells, and the number of copies of intracellular spiroplasmas is sharply increased by 12 h postinfection. In addition, S. eriocheiris can cause S2 cells to form typical inclusion bodies and exhibit large vacuoles. Second, S. eriocheiris is internalized into S2 cells and strongly inhibited through blocking clathrin-mediated endocytosis using chlorpromazine and dynasore. Inhibitors of macropinocytosis, protein kinase C and myosin II, cause a significant reduction in S. eriocheiris in S2 cells. In contrast, disruption of cellular cholesterol by methyl-β-cyclodextrin and nystatin has no effect on S. eriocheiris infection. These results suggest that the entry of S. eriocheiris into S2 cells relies on clathrin-dependent endocytosis and macropinocytosis, but not via the caveola-mediated endocytic pathway. In addition, the intracellular numbers of S. eriocheiris are dramatically reduced after S2 cells are treated with cytoskeleton-depolymerizing agents, including nocodazole and cytochalasin B. Thus, cellular infection by S. eriocheiris is related to microtubules and actin filaments. This research successfully shows for the first time that S. eriocheiris can invade Drosophila S2 cells and provides a process for S. eriocheiris infection.
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11
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Farooq QUA, Khan FF. Construction and analysis of a comprehensive protein interaction network of HCV with its host Homo sapiens. BMC Infect Dis 2019; 19:367. [PMID: 31039741 PMCID: PMC6492420 DOI: 10.1186/s12879-019-4000-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 04/17/2019] [Indexed: 12/24/2022] Open
Abstract
Background Hepatitis C Virus is becoming a major health problem in Asia and across the globe since it is causing serious liver diseases including liver cirrhosis, chronic hepatitis and hepatocarcinoma (HCC). Protein interaction networks presents us innumerable novel insights into functional constitution of proteome and helps us finding potential candidates for targeting the drugs. Methods Here we present a comprehensive protein interaction network of Hepatitis C Virus with its host, constructed by literature curated interactions. The network was constructed and explored using Cytoscape and the results were further analyzed using KEGG pathway, Gene Ontology enrichment analysis and MCODE. Results We found 1325 interactions between 12 HCV proteins and 940 human genes, among which 21 were intraviral and 1304 were HCV-Human. By analyzing the network, we found potential human gene list with their number of interactions with HCV proteins. ANXA2 and NR4A1 were interacting with 6 HCV proteins while we found 11 human genes which were interacting with 5 HCV proteins. Furthermore, the enrichment analysis and Gene Ontology of the top genes to find the pathways and the biological processes enriched with those genes. Among the viral proteins, NS3 was interacting with most number of interactors followed by NS5A and so on. KEGG pathway analysis of three set of most HCV- associated human genes was performed to find out which gene products are involved in certain disease pathways. Top 5, 10 and 20 human genes with most interactions were analyzed which revealed some striking results among which the top 10 host genes came up to be significant because they were more related to Influenza A viral infection previously. This insight provides us with a clue that the set of genes are highly enriched in HCV but are not well studied in its infection pathway. Conclusions We found out a group of proteins which were rich in HCV viral pathway but there were no drugs targeting them according to the drug repurposing hub. It can be concluded that the cluster we obtained from MCODE contains potential targets for HCV treatment and could be implemented for molecular docking and drug designing further by the scientists.
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Affiliation(s)
- Qurat Ul Ain Farooq
- College of Life Sciences and Bio Engineering, Beijing University of Technology, Beijing, China.
| | - Faisal F Khan
- Institute of Integrative Biosciences, CECOS University of IT and Emerging Sciences, Peshawar, Pakistan
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12
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Nitta S, Asahina Y, Kato T, Tsuchiya J, Inoue-Shinomiya E, Sato A, Tsunoda T, Miyoshi M, Kawai-Kitahata F, Murakawa M, Itsui Y, Nakagawa M, Azuma S, Kakinuma S, Hikita H, Takehara T, Watanabe M. Impact of novel NS5A resistance-associated substitutions of hepatitis C virus detected in treatment-experienced patients. Sci Rep 2019; 9:5722. [PMID: 30952914 PMCID: PMC6450881 DOI: 10.1038/s41598-019-42114-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 03/25/2019] [Indexed: 02/06/2023] Open
Abstract
Resistance-associated substitutions (RASs) of hepatitis C virus (HCV) in the NS5A region impair the efficacy of NS5A inhibitors. In this study, we evaluated the characteristics of the novel RASs observed in treatment-failure patients, A92K and a deletion at P32 (P32del), and the susceptibility of viruses with these RASs to various anti-HCV reagents by using JFH-1 based recombinant HCV with NS5A from a genotype 1b Con1 strain (JFH1/5ACon1). We introduced A92K or P32del solely or in combination with Q24K, L28M, R30Q or L31F into the NS5A of JFH1/5ACon1. Viruses harboring R30Q/A92K showed high extracellular core antigens and infectivity titers, whereas the other viruses with RASs showed low replication levels and infectivity titers. All the viruses with A92K or P32del were markedly resistant to ledipasvir, velpatasvir and elbasvir. Interestingly, viruses with R30Q/A92K were more susceptible to grazoprevir than viruses without RAS. All the viruses had a similar susceptibility to ribavirin and sofosbuvir. In conclusion, combination RASs R30Q/A92K enhanced virus production whereas other RASs impaired virus replication. Both A92K and P32del conferred severe resistance even to second generation NS5A inhibitors. However, these viruses were susceptible to grazoprevir, ribavirin and sofosbuvir. Thus, combination regimens with these reagents may eradicate viruses harboring A92K or P32del.
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Affiliation(s)
- Sayuri Nitta
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.,Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Yasuhiro Asahina
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan. .,Department of Liver Disease Control, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
| | - Takanobu Kato
- Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Jun Tsuchiya
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Emi Inoue-Shinomiya
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Ayako Sato
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Tomoyuki Tsunoda
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Masato Miyoshi
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Fukiko Kawai-Kitahata
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Miyako Murakawa
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yasuhiro Itsui
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Mina Nakagawa
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Seishin Azuma
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Sei Kakinuma
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.,Department of Liver Disease Control, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Hayato Hikita
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Tetsuo Takehara
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Mamoru Watanabe
- Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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13
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Aliyu IA, Ling KH, Md Hashim N, Chee HY. Annexin A2 extracellular translocation and virus interaction: A potential target for antivirus-drug discovery. Rev Med Virol 2019; 29:e2038. [PMID: 30746844 DOI: 10.1002/rmv.2038] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 01/20/2019] [Accepted: 01/21/2019] [Indexed: 12/23/2022]
Abstract
Annexin A2 is a membrane scaffolding and binding protein, which mediated various cellular events. Its functions are generally affected by cellular localization. In the cytoplasm, they interacted with different phospholipid membranes in Ca2+ -dependent manner and play vital roles including actin binding, remodeling and dynamics, cytoskeletal rearrangement, and lipid-raft microdomain formation. However, upon cell exposure to certain stimuli, annexin A2 translocates to the external leaflets of the plasma membrane where annexin A2 was recently reported to serve as a virus receptor, play an important role in the formation of virus replication complex, or implicated in virus assembly and budding. Here, we review some of annexin A2 roles in virus infections and the potentiality of targeting annexin A2 in the design of novel and promising antivirus agent that may have a broader consequence in virus therapy.
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Affiliation(s)
- Isah Abubakar Aliyu
- Department of Medical Microbiology and Parasitology, Faculty of Medicine and Health Science, University Putra Malaysia, Seri Kembangan, Malaysia.,Department of Medical Laboratory Science, Faculty of Allied Health Science, College of Health Science, Bayero University, Kano, Nigeria
| | - King-Hwa Ling
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, University Putra Malaysia, Seri Kembangan, Malaysia
| | - Nurfariesha Md Hashim
- Department of Biomedical Sciences, University Putra Malaysia, Seri Kembangan, Malaysia
| | - Hui-Yee Chee
- Department of Medical Microbiology and Parasitology, Faculty of Medicine and Health Science, University Putra Malaysia, Seri Kembangan, Malaysia
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14
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Taylor JR, Skeate JG, Kast WM. Annexin A2 in Virus Infection. Front Microbiol 2018; 9:2954. [PMID: 30568638 PMCID: PMC6290281 DOI: 10.3389/fmicb.2018.02954] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 11/16/2018] [Indexed: 12/17/2022] Open
Abstract
Viral life cycles consist of three main phases: (1) attachment and entry, (2) genome replication and expression, and (3) assembly, maturation, and egress. Each of these steps is intrinsically reliant on host cell factors and processes including cellular receptors, genetic replication machinery, endocytosis and exocytosis, and protein expression. Annexin A2 (AnxA2) is a membrane-associated protein with a wide range of intracellular functions and a recurrent host factor in a variety of viral infections. Spatially, AnxA2 is found in the nucleus and cytoplasm, vesicle-bound, and on the inner and outer leaflet of the plasma membrane. Structurally, AnxA2 exists as a monomer or in complex with S100A10 to form the AnxA2/S100A10 heterotetramer (A2t). Both AnxA2 and A2t have been implicated in a vast array of cellular functions such as endocytosis, exocytosis, membrane domain organization, and translational regulation through RNA binding. Accordingly, many discoveries have been made involving AnxA2 in viral pathogenesis, however, the reported work addressing AnxA2 in virology is highly compartmentalized. Therefore, the purpose of this mini review is to provide information regarding the role of AnxA2 in the lifecycle of multiple epithelial cell-targeting viruses to highlight recurrent themes, identify discrepancies, and reveal potential avenues for future research.
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Affiliation(s)
- Julia R Taylor
- Department of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA, United States
| | - Joseph G Skeate
- Department of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA, United States
| | - W Martin Kast
- Department of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, CA, United States.,Department of Obstetrics and Gynecology, University of Southern California, Los Angeles, CA, United States.,Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, United States
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15
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Zhang H, Zhang C, Tang H, Gao S, Sun F, Yang Y, Zhou W, Hu Y, Ke C, Wu Y, Ding Z, Guo L, Pei R, Chen X, Sy M, Zhang B, Li C. CD2-Associated Protein Contributes to Hepatitis C, Virus Propagation and Steatosis by Disrupting Insulin Signaling. Hepatology 2018; 68:1710-1725. [PMID: 29729186 PMCID: PMC6220802 DOI: 10.1002/hep.30073] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 04/11/2018] [Accepted: 04/30/2018] [Indexed: 12/12/2022]
Abstract
Chronic hepatitis C virus (HCV) infection can result in steatosis, a condition displaying aberrant accumulation of neutral lipid vesicles, the component of lipid droplets (LDs), which are essential for HCV assembly. However, the interplay between HCV infection and steatosis remains unclear. Here, we show that HCV-infected cells have higher levels of CD2-associated protein (CD2AP), which plays two distinct, yet tightly linked, roles in HCV pathogenesis: Elevated CD2AP binds to nonstructural protein 5A (NS5A) and participates in the transport of NS5A to LDs to facilitate viral assembly; Up-regulated CD2AP also interacts with casitas B-lineage lymphoma (b) (Cbl/Cbl-b) E3 ligases to degrade insulin receptor substrate 1 (IRS1), which, in turn, disrupts insulin signaling and increases LD accumulation through the IRS1/protein kinase B (Akt)/adenosine monophosphate-activated protein kinase (AMPK)/hormone-sensitive lipase (HSL) signaling axis to accommodate viral assembly. In the HCV-infected mouse model, CD2AP expression is up-regulated during the chronic infection stage and this up-regulation correlates well with liver steatosis. Importantly, CD2AP up-regulation was also detected in HCV-infected human liver biopsies showing steatosis compared to non-HCV-infected controls. Conclusion: CD2AP is indicated as a protein up-regulated by HCV infection, which, in turn, stimulates HCV propagation and steatosis by disrupting insulin signaling; targeting CD2AP may offer an opportunity for alleviating HCV infection and its associated liver pathology. (Hepatology 2018;XX:XXX-XXX.).
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Affiliation(s)
- Huixia Zhang
- Center for Molecular VirologyWuhan Institute of VirologyState Key Laboratory of VirologyChinese Academy of SciencesWuhanChina
- University of Chinese Academy of SciencesBeijingChina
| | - Chao Zhang
- Key laboratory of Infection and Immunity, Institute of BiophysicsChinese Academy of SciencesBeijingChina
| | - Hong Tang
- Institute Pasteur of Shanghai, Chinese Academy of SciencesShanghaiChina
| | - Shanshan Gao
- Center for Molecular VirologyWuhan Institute of VirologyState Key Laboratory of VirologyChinese Academy of SciencesWuhanChina
- University of Chinese Academy of SciencesBeijingChina
| | - Fang Sun
- Center for Molecular VirologyWuhan Institute of VirologyState Key Laboratory of VirologyChinese Academy of SciencesWuhanChina
- University of Chinese Academy of SciencesBeijingChina
| | - Yuan Yang
- Eastern Hepatobiliary Surgery Hospital, Second Military Medical UniversityShanghaiChina
| | - Weiping Zhou
- Eastern Hepatobiliary Surgery Hospital, Second Military Medical UniversityShanghaiChina
| | - Yu Hu
- Hepatic Surgery CenterTongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Changshu Ke
- Hepatic Surgery CenterTongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Yu Wu
- Hepatic Surgery CenterTongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Zeyang Ding
- Hepatic Surgery CenterTongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Lin Guo
- School of Life SciencesWuhan UniversityState Key Laboratory of VirologyWuhanChina
| | - Rongjuan Pei
- Center for Molecular VirologyWuhan Institute of VirologyState Key Laboratory of VirologyChinese Academy of SciencesWuhanChina
| | - Xinwen Chen
- Center for Molecular VirologyWuhan Institute of VirologyState Key Laboratory of VirologyChinese Academy of SciencesWuhanChina
| | - Man‐Sun Sy
- Department of Pathology, School of MedicineCase Western Reserve UniversityClevelandOH
| | - Bixiang Zhang
- Hepatic Surgery CenterTongji Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Chaoyang Li
- Center for Molecular VirologyWuhan Institute of VirologyState Key Laboratory of VirologyChinese Academy of SciencesWuhanChina
- School of Chemistry, Chemical Engineering, and Life SciencesWuhan University of TechnologyWuhanChina
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16
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Annexins in Translational Research: Hidden Treasures to Be Found. Int J Mol Sci 2018; 19:ijms19061781. [PMID: 29914106 PMCID: PMC6032224 DOI: 10.3390/ijms19061781] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 06/06/2018] [Accepted: 06/12/2018] [Indexed: 12/12/2022] Open
Abstract
The vertebrate annexin superfamily (AnxA) consists of 12 members of a calcium (Ca2+) and phospholipid binding protein family which share a high structural homology. In keeping with this hallmark feature, annexins have been implicated in the Ca2+-controlled regulation of a broad range of membrane events. In this review, we identify and discuss several themes of annexin actions that hold a potential therapeutic value, namely, the regulation of the immune response and the control of tissue homeostasis, and that repeatedly surface in the annexin activity profile. Our aim is to identify and discuss those annexin properties which might be exploited from a translational science and specifically, a clinical point of view.
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17
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Conflict in the Intracellular Lives of Endosymbionts and Viruses: A Mechanistic Look at Wolbachia-Mediated Pathogen-blocking. Viruses 2018; 10:v10040141. [PMID: 29561780 PMCID: PMC5923435 DOI: 10.3390/v10040141] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/14/2018] [Accepted: 03/20/2018] [Indexed: 12/16/2022] Open
Abstract
At the forefront of vector control efforts are strategies that leverage host-microbe associations to reduce vectorial capacity. The most promising of these efforts employs Wolbachia, a maternally transmitted endosymbiotic bacterium naturally found in 40% of insects. Wolbachia can spread through a population of insects while simultaneously inhibiting the replication of viruses within its host. Despite successes in using Wolbachia-transfected mosquitoes to limit dengue, Zika, and chikungunya transmission, the mechanisms behind pathogen-blocking have not been fully characterized. Firstly, we discuss how Wolbachia and viruses both require specific host-derived structures, compounds, and processes to initiate and maintain infection. There is significant overlap in these requirements, and infection with either microbe often manifests as cellular stress, which may be a key component of Wolbachia’s anti-viral effect. Secondly, we discuss the current understanding of pathogen-blocking through this lens of cellular stress and develop a comprehensive view of how the lives of Wolbachia and viruses are fundamentally in conflict with each other. A thorough understanding of the genetic and cellular determinants of pathogen-blocking will significantly enhance the ability of vector control programs to deploy and maintain effective Wolbachia-mediated control measures.
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18
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Solbak SMØ, Abdurakhmanov E, Vedeler A, Danielson UH. Characterization of interactions between hepatitis C virus NS5B polymerase, annexin A2 and RNA - effects on NS5B catalysis and allosteric inhibition. Virol J 2017; 14:236. [PMID: 29228983 PMCID: PMC5725786 DOI: 10.1186/s12985-017-0904-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 11/27/2017] [Indexed: 12/12/2022] Open
Abstract
Background Direct acting antivirals (DAAs) provide efficient hepatitis C virus (HCV) therapy and clearance for a majority of patients, but are not available or effective for all patients. They risk developing HCV-induced hepatocellular carcinoma (HCC), for which the mechanism remains obscure and therapy is missing. Annexin A2 (AnxA2) has been reported to co-precipitate with the non-structural (NS) HCV proteins NS5B and NS3/NS4A, indicating a role in HCC tumorigenesis and effect on DAA therapy. Methods Surface plasmon resonance biosensor technology was used to characterize direct interactions between AnxA2 and HCV NS5B, NS3/NS4 and RNA, and the subsequent effects on catalysis and inhibition. Results No direct interaction between AnxA2 and NS3/NS4A was detected, while AnxA2 formed a slowly dissociating, high affinity (KD = 30 nM), complex with NS5B, decreasing its catalytic activity and affinity for the allosteric inhibitor filibuvir. The RNA binding of the two proteins was independent and AnxA2 and NS5B interacted with different RNAs in ternary complexes of AnxA2:NS5B:RNA, indicating specific preferences. Conclusions The complex interplay revealed between NS5B, AnxA2, RNA and filibuvir, suggests that AnxA2 may have an important role for the progression and treatment of HCV infections and the development of HCC, which should be considered also when designing new allosteric inhibitors. Electronic supplementary material The online version of this article (10.1186/s12985-017-0904-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sara M Ø Solbak
- Department of Chemistry - BMC, Uppsala University, Uppsala, Sweden
| | | | - Anni Vedeler
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - U Helena Danielson
- Department of Chemistry - BMC, Uppsala University, Uppsala, Sweden. .,Science for Life Laboratory, Uppsala University, Uppsala, Sweden.
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19
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Role of circulatory microRNAs in the pathogenesis of hepatitis C virus. Virusdisease 2017; 28:360-367. [PMID: 29291226 DOI: 10.1007/s13337-017-0407-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 11/03/2017] [Indexed: 12/17/2022] Open
Abstract
Hepatitis C virus (HCV) is associated with one of the major health problem in world that ultimate results in the liver cirrhosis and leads to carcinoma of hepatocellular components round the world. More than 185 million people were found to be infected with HCV. MicroRNAs are small oligonucleotide RNA having 18-22 nucleotides. Circulating mi-RNAs regulate the replication of HCV and HCV-induced liver fibrosis and HCC. By comparing the expression profiles of mi-RNAs of normal individuals with HCV infected patients, aberrant changes in expression of different mi-RNAs have been observed so it can be predicted that these mi-RNAs are associated with and play a central role in the hepatitis C infection and diseases associated with it. This review demonstrates the major role of circulatory microRNAs in the HCV and HCV associated ailments.
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20
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Zhang H, Gao S, Pei R, Chen X, Li C. Hepatitis C virus-induced prion protein expression facilitates hepatitis C virus replication. Virol Sin 2017; 32:503-510. [PMID: 29076011 DOI: 10.1007/s12250-017-4039-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 09/18/2017] [Indexed: 12/15/2022] Open
Abstract
Hepatitis C virus (HCV) infects approximately 180 million people worldwide. Significant progress has been made since the establishment of in vitro HCV infection models in cells. However, the replication of HCV is complex and not completely understood. Here, we found that the expression of host prion protein (PrP) was induced in an HCV replication cell model. We then showed that increased PrP expression facilitated HCV genomic replication. Finally, we demonstrated that the KKRPK motif on the N-terminus of PrP bound nucleic acids and facilitated HCV genomic replication. Our results provided important insights into how viruses may harness cellular protein to achieve propagation.
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Affiliation(s)
- Huixia Zhang
- State Key Laboratory of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
- Center for Molecular Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
- University of the Chinese Academy of Sciences, Beijing, 100000, China
| | - Shanshan Gao
- State Key Laboratory of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
- Center for Molecular Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
- University of the Chinese Academy of Sciences, Beijing, 100000, China
| | - Rongjuan Pei
- State Key Laboratory of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
- Center for Molecular Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Xinwen Chen
- State Key Laboratory of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
- Center for Molecular Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Chaoyang Li
- State Key Laboratory of Virology, Chinese Academy of Sciences, Wuhan, 430071, China.
- Center for Molecular Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China.
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21
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Qiao W, Medina V, Falk BW. Inspirations on Virus Replication and Cell-to-Cell Movement from Studies Examining the Cytopathology Induced by Lettuce infectious yellows virus in Plant Cells. FRONTIERS IN PLANT SCIENCE 2017; 8:1672. [PMID: 29021801 PMCID: PMC5623981 DOI: 10.3389/fpls.2017.01672] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 09/12/2017] [Indexed: 05/06/2023]
Abstract
Lettuce infectious yellows virus (LIYV) is the type member of the genus Crinivirus in the family Closteroviridae. Like many other positive-strand RNA viruses, LIYV infections induce a number of cytopathic changes in plant cells, of which the two most characteristic are: Beet yellows virus-type inclusion bodies composed of vesicles derived from cytoplasmic membranes; and conical plasmalemma deposits (PLDs) located at the plasmalemma over plasmodesmata pit fields. The former are not only found in various closterovirus infections, but similar structures are known as 'viral factories' or viroplasms in cells infected with diverse types of animal and plant viruses. These are generally sites of virus replication, virion assembly and in some cases are involved in cell-to-cell transport. By contrast, PLDs induced by the LIYV-encoded P26 non-virion protein are not involved in replication but are speculated to have roles in virus intercellular movement. These deposits often harbor LIYV virions arranged to be perpendicular to the plasma membrane over plasmodesmata, and our recent studies show that P26 is required for LIYV systemic plant infection. The functional mechanism of how LIYV P26 facilitates intercellular movement remains unclear, however, research on other plant viruses provides some insights on the possible ways of viral intercellular movement through targeting and modifying plasmodesmata via interactions between plant cellular components and viral-encoded factors. In summary, beginning with LIYV, we review the studies that have uncovered the biological determinants giving rise to these cytopathological effects and their importance in viral replication, virion assembly and intercellular movement during the plant infection by closteroviruses, and compare these findings with those for other positive-strand RNA viruses.
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Affiliation(s)
- Wenjie Qiao
- Department of Plant Pathology, University of California, Davis, Davis, CA, United States
| | - Vicente Medina
- Department of Crop and Forest Sciences, University of Lleida, Lleida, Spain
| | - Bryce W. Falk
- Department of Plant Pathology, University of California, Davis, Davis, CA, United States
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Abstract
Microtubules (MTs) form a rapidly adaptable network of filaments that radiate throughout the cell. These dynamic arrays facilitate a wide range of cellular processes, including the capture, transport, and spatial organization of cargos and organelles, as well as changes in cell shape, polarity, and motility. Nucleating from MT-organizing centers, including but by no means limited to the centrosome, MTs undergo rapid transitions through phases of growth, pause, and catastrophe, continuously exploring and adapting to the intracellular environment. Subsets of MTs can become stabilized in response to environmental cues, acquiring distinguishing posttranslational modifications and performing discrete functions as specialized tracks for cargo trafficking. The dynamic behavior and organization of the MT array is regulated by MT-associated proteins (MAPs), which include a subset of highly specialized plus-end-tracking proteins (+TIPs) that respond to signaling cues to alter MT behavior. As pathogenic cargos, viruses require MTs to transport to and from their intracellular sites of replication. While interactions with and functions for MT motor proteins are well characterized and extensively reviewed for many viruses, this review focuses on MT filaments themselves. Changes in the spatial organization and dynamics of the MT array, mediated by virus- or host-induced changes to MT regulatory proteins, not only play a central role in the intracellular transport of virus particles but also regulate a wider range of processes critical to the outcome of infection.
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Kuehnl A, Musiol A, Raabe CA, Rescher U. Emerging functions as host cell factors - an encyclopedia of annexin-pathogen interactions. Biol Chem 2017; 397:949-59. [PMID: 27366904 DOI: 10.1515/hsz-2016-0183] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 06/28/2016] [Indexed: 12/14/2022]
Abstract
Emerging infectious diseases and drug-resistant infectious agents call for the development of innovative antimicrobial strategies. With pathogenicity now considered to arise from the complex and bi-directional interplay between a microbe and the host, host cell factor targeting has emerged as a promising approach that might overcome the limitations of classical antimicrobial drug development and could open up novel and efficient therapeutic strategies. Interaction with and modulation of host cell membranes is a recurrent theme in the host-microbe relationship. In this review, we provide an overview of what is currently known about the role of the Ca2+ dependent, membrane-binding annexin protein family in pathogen-host interactions, and discuss their emerging functions as host cell derived auxiliary proteins in microbe-host interactions and host cell targets.
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Affinity Purification of the Hepatitis C Virus Replicase Identifies Valosin-Containing Protein, a Member of the ATPases Associated with Diverse Cellular Activities Family, as an Active Virus Replication Modulator. J Virol 2016; 90:9953-9966. [PMID: 27558430 DOI: 10.1128/jvi.01140-16] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 08/19/2016] [Indexed: 12/11/2022] Open
Abstract
Like almost all of the positive-strand RNA viruses, hepatitis C virus (HCV) induces host intracellular membrane modification to form the membrane-bound viral replication complex (RC), within which viral replicases amplify the viral RNA genome. Despite accumulated information about how HCV co-opts host factors for viral replication, our knowledge of the molecular mechanisms by which viral proteins hijack host factors for replicase assembly has only begun to emerge. Purification of the viral replicase and identification of the replicase-associated host factors to dissect their roles in RC biogenesis will shed light on the molecular mechanisms of RC assembly. To purify the viral replicase in the context of genuine viral replication, we developed an HCV subgenomic replicon system in which two different affinity tags were simultaneously inserted in frame into HCV NS5A and NS5B. After solubilizing the replicon cells, we purified the viral replicase by two-step affinity purification and identified the associated host factors by mass spectrometry. We identified valosin-containing protein (VCP), a member of the ATPases associated with diverse cellular activities (AAA+ATPase) family, as an active viral replication modulator whose ATPase activity is required for viral replication. A transient replication assay indicated that VCP is involved mainly in viral genome amplification. VCP associated with viral replicase and colocalized with a viral RC marker. Further, in an HCV replicase formation surrogate system, abolishing VCP function resulted in aberrant distribution of HCV NS5A. We propose that HCV may co-opt a host AAA+ATPase for its replicase assembly. IMPORTANCE Almost all of the positive-strand RNA viruses share a replication strategy in which viral proteins modify host membranes to form the membrane-associated viral replicase. Viruses hijack host factors to facilitate this energy-unfavorable process. Understanding of this fundamental process is hampered by the challenges of purifying the replicase because of the technical difficulties involved. In this study, we developed an HCV subgenomic replicon system in which two different affinity tags were simultaneously inserted in frame into two replicase components. Using this dual-affinity-tagged replicon system, we purified the viral replicase and identified valosin-containing protein (VCP) AAA+ATPase as a pivotal viral replicase-associated host factor that is required for viral genome replication. Abolishing VCP function resulted in aberrant viral protein distribution. We propose that HCV hijacks a host AAA+ATPase for its replicase assembly. Understanding the molecular mechanism of VCP regulates viral replicase assembly may lead to novel antiviral strategies targeting the most conserved viral replication step.
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Nguyen CB, Houchen CW, Ali N. APSA Awardee Submission: Tumor/cancer stem cell marker doublecortin-like kinase 1 in liver diseases. Exp Biol Med (Maywood) 2016; 242:242-249. [PMID: 27694285 DOI: 10.1177/1535370216672746] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Liver diseases are the fourth leading cause of mortality among adults in the United States. Patients with chronic liver diseases such as viral hepatitis, fibrosis, and cirrhosis have significantly higher risks of developing hepatocellular carcinoma (HCC). With a dismal five-year survival rate of 11%, HCC is the third most common cause of cancer-related deaths worldwide. Regardless of the underlying cause, late presentation and a lack of effective therapy are the major impediments for successful treatment of HCC. Therefore, there is a considerable interest in developing new strategies for the prevention and treatment of chronic liver diseases at the early stages. Cancer stem cells (CSCs), a small cell subpopulation in a tumor, exhibit unlimited self-renewal and differentiation capacity. These cells are believed to play pivotal roles in the initiation, growth, metastasis, and drug-resistance of tumors. In this review, we will briefly discuss pivotal roles of the CSC marker doublecortin-like kinase 1 (DCLK1) in hepatic tumorigenesis. Recent evidence suggests that anti-DCLK1 strategies hold promising clinical potential for the treatment of cancers of the liver, pancreas, and colon.
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Affiliation(s)
- Charles B Nguyen
- 1 College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Courtney W Houchen
- 2 Section of Digestive Diseases and Nutrition, Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.,3 Peggy and Charles Stephenson Cancer Center, Oklahoma City, OK 73104, USA.,4 Department of Veterans Affairs Medical Center, Oklahoma City, OK 73104, USA
| | - Naushad Ali
- 2 Section of Digestive Diseases and Nutrition, Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.,3 Peggy and Charles Stephenson Cancer Center, Oklahoma City, OK 73104, USA.,4 Department of Veterans Affairs Medical Center, Oklahoma City, OK 73104, USA
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26
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Zhang X, Wang T, Dai X, Zhang Y, Jiang H, Zhang Q, Liu F, Wu K, Liu Y, Zhou H, Wu J. Golgi protein 73 facilitates the interaction of hepatitis C virus NS5A with apolipoprotein E to promote viral particle secretion. Biochem Biophys Res Commun 2016; 479:683-689. [PMID: 27697522 DOI: 10.1016/j.bbrc.2016.09.152] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 09/28/2016] [Indexed: 12/12/2022]
Abstract
Hepatitis C virus (HCV) infection is one of the leading causes of chronic liver diseases and hepatocellular carcinoma (HCC). Golgi protein 73 (GP73), a resident Golgi membrane protein, is a novel serum biomarker for the diagnosis of liver diseases and HCC. Although previous studies have demonstrated that HCV upregulates GP73 expression and GP73 promotes HCV secretion through its interaction with apolipoprotein E (ApoE), the exact mechanism underlying GP73 regulates HCV secretion remains unclear. In this study, we demonstrated that GP73 mediates the interaction of ApoE with HCV NS5A protein to promote HCV secretion. We revealed that GP73 is colocalized with HCV replication complex in infected-Huh7.5.1 cells. Further studies demonstrated that GP73 interacted with both NS5A and ApoE proteins. Furthermore, knockdown of GP73 significantly reduced the binding of NS5A with ApoE, and the production of virus particles in culture supernatant. Taken together, our studies revealed that GP73 promotes HCV secretion by directly mediating the interaction of ApoE with HCV replication complex through binding with HCV NS5A.
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Affiliation(s)
- Xuewu Zhang
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Tianci Wang
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Xuechen Dai
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Yecheng Zhang
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Hui Jiang
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Qi Zhang
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Fang Liu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Kailang Wu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Yingle Liu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China.
| | - Hong Zhou
- Department of Clinical Laboratory, Wuhan Medical Treatment Center, Wuhan 430023, China.
| | - Jianguo Wu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China.
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27
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Nagy PD. Tombusvirus-Host Interactions: Co-Opted Evolutionarily Conserved Host Factors Take Center Court. Annu Rev Virol 2016; 3:491-515. [PMID: 27578441 DOI: 10.1146/annurev-virology-110615-042312] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Plant positive-strand (+)RNA viruses are intracellular infectious agents that reorganize subcellular membranes and rewire the cellular metabolism of host cells to achieve viral replication in elaborate replication compartments. This review describes the viral replication process based on tombusviruses, highlighting common strategies with other plant and animal viruses. Overall, the works on Tomato bushy stunt virus (TBSV) have revealed intriguing and complex functions of co-opted cellular translation factors, heat shock proteins, DEAD-box helicases, lipid transfer proteins, and membrane-deforming proteins in virus replication. The emerging picture is that many of the co-opted host factors are from highly expressed and conserved protein families. By hijacking host proteins, phospholipids, sterols, and the actin network, TBSV exerts supremacy over the host cell to support viral replication in large replication compartments. Altogether, these advances in our understanding of tombusvirus-host interactions are broadly applicable to many other viruses, which also usurp conserved host factors for various viral processes.
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Affiliation(s)
- Peter D Nagy
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546;
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28
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Pérez-Berná AJ, Rodríguez MJ, Chichón FJ, Friesland MF, Sorrentino A, Carrascosa JL, Pereiro E, Gastaminza P. Structural Changes In Cells Imaged by Soft X-ray Cryo-Tomography During Hepatitis C Virus Infection. ACS NANO 2016; 10:6597-611. [PMID: 27328170 DOI: 10.1021/acsnano.6b01374] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Chronic hepatitis C virus (HCV) infection causes severe liver disease in millions of humans worldwide. Pathogenesis of HCV infection is strongly driven by a deficient immune response of the host, although intersection of different aspects of the virus life cycle with cellular homeostasis is emerging as an important player in the pathogenesis and progression of the disease. Cryo soft X-ray tomography (cryo-SXT) was performed to investigate the ultrastructural alterations induced by the interference of HCV replication with cellular homeostasis. Native, whole cell, three-dimensional (3D) maps were obtained in HCV replicon-harboring cells and in a surrogate model of HCV infection. Tomograms from HCV-replicating cells show blind-ended endoplasmic reticulum tubules with pseudospherical extrusions and marked alterations of mitochondrial morphology that correlated spatially with the presence of endoplasmic reticulum alterations, suggesting a short-range influence of the viral machinery on mitochondrial homeostasis. Both mitochondrial and endoplasmic reticulum alterations could be reverted by a combination of sofosbuvir/daclatasvir, which are clinically approved direct-acting antivirals for the treatment of chronic HCV infection. In addition to providing structural insight into cellular aspects of HCV pathogenesis, our study illustrates how cryo-SXT is a powerful 3D wide-field imaging tool for the assessment and understanding of complex cellular processes in a setting of near-native whole hydrated cells. Our results also constitute a proof of concept for the use of cryo-SXT as a platform that enables determining the potential impact of candidate compounds on the ultrastructure of the cell that may assist drug development at a preclinical level.
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Affiliation(s)
- Ana Joaquina Pérez-Berná
- MISTRAL Beamline Experiments Division, ALBA Synchrotron Light Source , Cerdanyola del Vallès, 08290 Barcelona, Spain
| | | | | | | | - Andrea Sorrentino
- MISTRAL Beamline Experiments Division, ALBA Synchrotron Light Source , Cerdanyola del Vallès, 08290 Barcelona, Spain
| | | | - Eva Pereiro
- MISTRAL Beamline Experiments Division, ALBA Synchrotron Light Source , Cerdanyola del Vallès, 08290 Barcelona, Spain
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29
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Nguyen CB, Kotturi H, Waris G, Mohammed A, Chandrakesan P, May R, Sureban S, Weygant N, Qu D, Rao CV, Dhanasekaran DN, Bronze MS, Houchen CW, Ali N. (Z)-3,5,4'-Trimethoxystilbene Limits Hepatitis C and Cancer Pathophysiology by Blocking Microtubule Dynamics and Cell-Cycle Progression. Cancer Res 2016; 76:4887-96. [PMID: 27287718 DOI: 10.1158/0008-5472.can-15-2722] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 06/05/2016] [Indexed: 02/07/2023]
Abstract
Hepatocellular carcinoma (HCC) is the third most common cause of cancer-related deaths worldwide. Chronic hepatitis C virus (HCV) infection causes induction of several tumors/cancer stem cell (CSC) markers and is known to be a major risk factor for development of HCC. Therefore, drugs that simultaneously target viral replication and CSC properties are needed for a risk-free treatment of advanced stage liver diseases, including HCC. Here, we demonstrated that (Z)-3,5,4'-trimethoxystilbene (Z-TMS) exhibits potent antitumor and anti-HCV activities without exhibiting cytotoxicity to human hepatocytes in vitro or in mice livers. Diethylnitrosamine (DEN)/carbon tetrachloride (CCl4) extensively induced expression of DCLK1 (a CSC marker) in the livers of C57BL/6 mice following hepatic injury. Z-TMS exhibited hepatoprotective effects against DEN/CCl4-induced injury by reducing DCLK1 expression and improving histologic outcomes. The drug caused bundling of DCLK1 with microtubules and blocked cell-cycle progression at G2-M phase in hepatoma cells via downregulation of CDK1, induction of p21(cip1/waf1) expression, and inhibition of Akt (Ser(473)) phosphorylation. Z-TMS also inhibited proliferation of erlotinib-resistant lung adenocarcinoma cells (H1975) bearing the T790M EGFR mutation, most likely by promoting autophagy and nuclear fragmentation. In conclusion, Z-TMS appears to be a unique therapeutic agent targeting HCV and concurrently eliminating cells with neoplastic potential during chronic liver diseases, including HCC. It may also be a valuable drug for targeting drug-resistant carcinomas and cancers of the lungs, pancreas, colon, and intestine, in which DCLK1 is involved in tumorigenesis. Cancer Res; 76(16); 4887-96. ©2016 AACR.
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Affiliation(s)
- Charles B Nguyen
- College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Hari Kotturi
- Department of Biology, University of Central Oklahoma, Edmond, Oklahoma
| | - Gulam Waris
- Department of Microbiology and Immunology, Rosalind Franklin University of Medicine and Science, North Chicago, Illinois
| | - Altaf Mohammed
- College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Center for Cancer Prevention and Drug Development, Hematology-Oncology Section, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Parthasarathy Chandrakesan
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Department of Veterans Affairs Medical Center, Oklahoma City, Oklahoma
| | - Randal May
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Department of Veterans Affairs Medical Center, Oklahoma City, Oklahoma
| | - Sripathi Sureban
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Department of Veterans Affairs Medical Center, Oklahoma City, Oklahoma
| | - Nathaniel Weygant
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Dongfeng Qu
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Department of Veterans Affairs Medical Center, Oklahoma City, Oklahoma
| | - Chinthalapally V Rao
- College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Center for Cancer Prevention and Drug Development, Hematology-Oncology Section, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Danny N Dhanasekaran
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Michael S Bronze
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Courtney W Houchen
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Department of Veterans Affairs Medical Center, Oklahoma City, Oklahoma.
| | - Naushad Ali
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma. Department of Veterans Affairs Medical Center, Oklahoma City, Oklahoma.
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30
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Awan Z, Tay ESE, Eyre NS, Wu LE, Beard MR, Boo I, Drummer HE, George J, Douglas MW. Calsyntenin-1 mediates hepatitis C virus replication. J Gen Virol 2016; 97:1877-1887. [PMID: 27221318 DOI: 10.1099/jgv.0.000511] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The hepatitis C virus (HCV) RNA genome of 9.6 kb encodes only 10 proteins, and so is highly dependent on host hepatocyte factors to facilitate replication. We aimed to identify host factors involved in the egress of viral particles. By screening the supernatant of HCV-infected Huh7 cells using SILAC-based proteomics, we identified the transmembrane protein calsyntenin-1 as a factor specifically secreted by infected cells. Calsyntenin-1 has previously been shown to mediate transport of endosomes along microtubules in neurons, through interactions with kinesin light chain-1. Here we demonstrate for the first time, we believe, a similar role for calsyntenin-1 in Huh7 cells, mediating intracellular transport of endosomes. In HCV-infected cells we show that calsyntenin-1 contributes to the early stages of the viral replication cycle and the formation of the replication complex. Importantly, we demonstrate in our model that silencing calsyntenin-1 disrupts the viral replication cycle, confirming the reliance of HCV on this protein as a host factor. Characterizing the function of calsyntenin-1 will increase our understanding of the HCV replication cycle and pathogenesis, with potential application to other viruses sharing common pathways.
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Affiliation(s)
- Zunaira Awan
- Storr Liver Centre, The Westmead Millennium Institute for Medical Research, The University of Sydney at Westmead Hospital, 176 Hawkesbury Rd, Westmead NSW 2145, Australia
| | - Enoch S E Tay
- Storr Liver Centre, The Westmead Millennium Institute for Medical Research, The University of Sydney at Westmead Hospital, 176 Hawkesbury Rd, Westmead NSW 2145, Australia
| | - Nicholas S Eyre
- Hepatitis C Virus Research Laboratory, School of Molecular and Biomedical Science, University of Adelaide, Adelaide, Australia
| | - Lindsay E Wu
- University of New South Wales, Sydney NSW 2052, Australia
| | - Michael R Beard
- Hepatitis C Virus Research Laboratory, School of Molecular and Biomedical Science, University of Adelaide, Adelaide, Australia
| | - Irene Boo
- Centre for Biomedical Research, Burnet Institute, 85 Commercial Rd, Melbourne VIC 3004, Australia
| | - Heidi E Drummer
- Centre for Biomedical Research, Burnet Institute, 85 Commercial Rd, Melbourne VIC 3004, Australia.,Department of Microbiology, 19 Innovation Walk, Monash University, Victoria, Australia.,Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Jacob George
- Storr Liver Centre, The Westmead Millennium Institute for Medical Research, The University of Sydney at Westmead Hospital, 176 Hawkesbury Rd, Westmead NSW 2145, Australia
| | - Mark W Douglas
- Storr Liver Centre, The Westmead Millennium Institute for Medical Research, The University of Sydney at Westmead Hospital, 176 Hawkesbury Rd, Westmead NSW 2145, Australia.,Centre for Infectious Diseases and Microbiology, Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney at Westmead Hospital, Westmead NSW 2145, Australia
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31
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Grabowski JM, Perera R, Roumani AM, Hedrick VE, Inerowicz HD, Hill CA, Kuhn RJ. Changes in the Proteome of Langat-Infected Ixodes scapularis ISE6 Cells: Metabolic Pathways Associated with Flavivirus Infection. PLoS Negl Trop Dis 2016; 10:e0004180. [PMID: 26859745 PMCID: PMC4747643 DOI: 10.1371/journal.pntd.0004180] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 09/29/2015] [Indexed: 12/18/2022] Open
Abstract
Background Ticks (Family Ixodidae) transmit a variety of disease causing agents to humans and animals. The tick-borne flaviviruses (TBFs; family Flaviviridae) are a complex of viruses, many of which cause encephalitis and hemorrhagic fever, and represent global threats to human health and biosecurity. Pathogenesis has been well studied in human and animal disease models. Equivalent analyses of tick-flavivirus interactions are limited and represent an area of study that could reveal novel approaches for TBF control. Methodology/Principal Findings High resolution LC-MS/MS was used to analyze the proteome of Ixodes scapularis (Lyme disease tick) embryonic ISE6 cells following infection with Langat virus (LGTV) and identify proteins associated with viral infection and replication. Maximal LGTV infection of cells and determination of peak release of infectious virus, was observed at 36 hours post infection (hpi). Proteins were extracted from ISE6 cells treated with LGTV and non-infectious (UV inactivated) LGTV at 36 hpi and analyzed by mass spectrometry. The Omics Discovery Pipeline (ODP) identified thousands of MS peaks. Protein homology searches against the I. scapularis IscaW1 genome assembly identified a total of 486 proteins that were subsequently assigned to putative functional pathways using searches against the Kyoto Encyclopedia of Genes and Genomes (KEGG) database. 266 proteins were differentially expressed following LGTV infection relative to non-infected (mock) cells. Of these, 68 proteins exhibited increased expression and 198 proteins had decreased expression. The majority of the former were classified in the KEGG pathways: “translation”, “amino acid metabolism”, and “protein folding/sorting/degradation”. Finally, Trichostatin A and Oligomycin A increased and decreased LGTV replication in vitro in ISE6 cells, respectively. Conclusions/Significance Proteomic analyses revealed ISE6 proteins that were differentially expressed at the peak of LGTV replication. Proteins with increased expression following infection were associated with cellular metabolic pathways and glutaminolysis. In vitro assays using small molecules implicate malate dehydrogenase (MDH2), the citrate cycle, cellular acetylation, and electron transport chain processes in viral replication. Proteins were identified that may be required for TBF infection of ISE6 cells. These proteins are candidates for functional studies and targets for the development of transmission-blocking vaccines and drugs. High-throughput proteomics offers an approach to evaluate changes in cell protein levels following arboviral infection. Research to understand the molecular basis of human-flavivirus interactions has advanced significantly over the past decade, but comparatively little is known regarding interactions between ticks and tick-borne flaviviruses (TBFs). Here, we employed a proteomics approach using an I. scapularis ISE6 cell line infected with the TBF Langat virus (LGTV) to identify proteins and biochemical pathways affected by viral infection. An LC-MS/MS approach was used to identify proteins that were subsequently assigned to putative cellular pathways based on orthology to proteins in the KEGG database. Biochemical pathways common among arthropods in response to infection with flavivirus and possibly unique to tick-flavivirus interactions, were identified. In vitro cellular assays using small molecules suggest the involvement of the ISE6 proteins, malate dehydrogenase (MDH2), and mitochondria in viral replication. These analyses provide a basis for further studies to identify tick proteins associated with viral replication that could be targeted to disrupt TBF transmission.
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Affiliation(s)
- Jeffrey M. Grabowski
- Department of Entomology, College of Agriculture, Purdue University, West Lafayette, Indiana, United States of America
- Markey Center for Structural Biology, Department of Biological Sciences, College of Science, Purdue University, West Lafayette, Indiana, United States of America
| | - Rushika Perera
- Markey Center for Structural Biology, Department of Biological Sciences, College of Science, Purdue University, West Lafayette, Indiana, United States of America
| | - Ali M. Roumani
- Bindley Bioscience Center, Purdue University, West Lafayette, Indiana, United States of America
| | - Victoria E. Hedrick
- Bindley Bioscience Center, Purdue University, West Lafayette, Indiana, United States of America
| | - Halina D. Inerowicz
- Bindley Bioscience Center, Purdue University, West Lafayette, Indiana, United States of America
| | - Catherine A. Hill
- Department of Entomology, College of Agriculture, Purdue University, West Lafayette, Indiana, United States of America
| | - Richard J. Kuhn
- Markey Center for Structural Biology, Department of Biological Sciences, College of Science, Purdue University, West Lafayette, Indiana, United States of America
- Bindley Bioscience Center, Purdue University, West Lafayette, Indiana, United States of America
- * E-mail:
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32
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Zhou LY, Zhang LL. Host restriction factors for hepatitis C virus. World J Gastroenterol 2016; 22:1477-86. [PMID: 26819515 PMCID: PMC4721981 DOI: 10.3748/wjg.v22.i4.1477] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 09/30/2015] [Accepted: 11/13/2015] [Indexed: 02/06/2023] Open
Abstract
Host-hepatitis C virus (HCV) interactions have both informed fundamental concepts of viral replication and pathogenesis and provided novel insights into host cell biology. These findings are illustrated by the recent discovery of host-encoded factors that restrict HCV infection. In this review, we briefly discuss these restriction factors in different steps of HCV infection. In each case, we discuss how these restriction factors were identified, the mechanisms by which they inhibit HCV infection and their potential contribution to viral pathogenesis.
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33
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Khachatoorian R, French SW. Chaperones in hepatitis C virus infection. World J Hepatol 2016; 8:9-35. [PMID: 26783419 PMCID: PMC4705456 DOI: 10.4254/wjh.v8.i1.9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 10/01/2015] [Accepted: 12/18/2015] [Indexed: 02/06/2023] Open
Abstract
The hepatitis C virus (HCV) infects approximately 3% of the world population or more than 185 million people worldwide. Each year, an estimated 350000-500000 deaths occur worldwide due to HCV-associated diseases including cirrhosis and hepatocellular carcinoma. HCV is the most common indication for liver transplantation in patients with cirrhosis worldwide. HCV is an enveloped RNA virus classified in the genus Hepacivirus in the Flaviviridae family. The HCV viral life cycle in a cell can be divided into six phases: (1) binding and internalization; (2) cytoplasmic release and uncoating; (3) viral polyprotein translation and processing; (4) RNA genome replication; (5) encapsidation (packaging) and assembly; and (6) virus morphogenesis (maturation) and secretion. Many host factors are involved in the HCV life cycle. Chaperones are an important group of host cytoprotective molecules that coordinate numerous cellular processes including protein folding, multimeric protein assembly, protein trafficking, and protein degradation. All phases of the viral life cycle require chaperone activity and the interaction of viral proteins with chaperones. This review will present our current knowledge and understanding of the role of chaperones in the HCV life cycle. Analysis of chaperones in HCV infection will provide further insights into viral/host interactions and potential therapeutic targets for both HCV and other viruses.
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Chemical proteomic identification of T-plastin as a novel host cell response factor in HCV infection. Sci Rep 2015; 5:9773. [PMID: 25909246 PMCID: PMC4408979 DOI: 10.1038/srep09773] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 03/18/2015] [Indexed: 12/17/2022] Open
Abstract
Hepatitis C virus (HCV) infection is the leading cause of chronic liver disease that
currently affects at least 170 million people worldwide. Although significant
efforts have been focused on discovering inhibitors of a viral polymerase (NS5B) or
protease (NS3), strategies to cure HCV infection have been hampered by the limited
therapeutic target proteins. Thus, discovery of a novel target remains a major
challenge. Here, we report a method that combines transcriptome expression analysis
with unbiased proteome reactivity profiling to identify novel host cell response
factors in HCV infection. A chemical probe for non-directed proteomic profiling was
selected based on genome-wide transcriptome expression analysis after HCV infection,
which revealed noticeable alterations related to disulfide bond metabolism. On the
basis of this result, we screened the proteome reactivity using chemical probes
containing thiol-reactive functional groups and discovered a unique labeling profile
in HCV-infected cells. A subsequent quantitative chemical proteomic mapping study
led to the identification of a target protein, T-plastin (PLST), and its regulation
of HCV replication. Our approach demonstrates both a straightforward strategy for
selecting chemical probes to discriminate disease states using a model system and
its application for proteome reactivity profiling for novel biomarker discovery.
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Kozlov MV, Kleymenova AA, Romanova LI, Konduktorov KA, Kamarova KA, Smirnova OA, Prassolov VS, Kochetkov SN. Pyridine hydroxamic acids are specific anti-HCV agents affecting HDAC6. Bioorg Med Chem Lett 2015; 25:2382-5. [PMID: 25937017 DOI: 10.1016/j.bmcl.2015.04.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 04/02/2015] [Accepted: 04/04/2015] [Indexed: 11/30/2022]
Abstract
Recently we reported benzohydroxamic acids (BHAs) as potent and selective inhibitors of hepatitis C virus (HCV) replicon propagation. In this work 12 pyridine hydroxamic acids (PHAs) were synthesized and tested in full-genome replicon assay. It was found that PHAs possessed very similar anti-HCV properties compared to BHAs. Both classes of hydroxamic acids caused hyperacetylation of α-tubulin pointing to inhibition of histone deacetylase 6 (HDAC6) as part of their antiviral activity. The tested compounds did not inhibit the growth of poliovirus, displaying high selectivity against HCV.
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Affiliation(s)
- Maxim V Kozlov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Str. 32, 119991 Moscow, Russia.
| | - Alla A Kleymenova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Str. 32, 119991 Moscow, Russia
| | - Lyudmila I Romanova
- Chumakov Institute of Poliomyelitis, Russian Academy of Medical Sciences, 142782 Moscow Region, Russia
| | - Konstantin A Konduktorov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Str. 32, 119991 Moscow, Russia
| | - Kamila A Kamarova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Str. 32, 119991 Moscow, Russia
| | - Olga A Smirnova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Str. 32, 119991 Moscow, Russia
| | - Vladimir S Prassolov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Str. 32, 119991 Moscow, Russia
| | - Sergey N Kochetkov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Str. 32, 119991 Moscow, Russia
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Kozlov MV, Kleymenova AA, Konduktorov KA, Malikova AZ, Kochetkov SN. Selective inhibitor of histone deacetylase 6 (tubastatin A) suppresses proliferation of hepatitis C virus replicon in culture of human hepatocytes. BIOCHEMISTRY (MOSCOW) 2015; 79:637-42. [PMID: 25108326 DOI: 10.1134/s0006297914070050] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Acetylation of α-tubulin was studied in cultures of human hepatocytes under the influence of selective inhibitors of histone deacetylases HDAC6 and SIRT-2 - tubastatin A and 2-(3-phenethoxyphenylamino)benzamide, respectively. It was found that in hepatocyte cell line HepG2 acetylated α-tubulin is accumulated preferentially on inhibition of HDAC6 but not of SIRT-2. Under the same conditions, no acetylation of α-tubulin was observed in hepatocyte cell line Huh7. However, the inhibition of HDAC6 with tubastatin A led to hyperacetylation of α-tubulin and simultaneously to decrease in viral RNA concentration in hepatocyte cell line Huh7-luc/neo, which supports propagation of the full genome replicon of hepatitis C virus. The correlation between these two processes points to HDAC6 as a promising cellular target for therapy of hepatitis C.
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Affiliation(s)
- M V Kozlov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991, Russia.
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Ji W, Guo Z, Ding NZ, He CQ. Studying classical swine fever virus: Making the best of a bad virus. Virus Res 2015; 197:35-47. [DOI: 10.1016/j.virusres.2014.12.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/02/2014] [Accepted: 12/04/2014] [Indexed: 01/04/2023]
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Emerging roles of interferon-stimulated genes in the innate immune response to hepatitis C virus infection. Cell Mol Immunol 2014; 13:11-35. [PMID: 25544499 PMCID: PMC4712384 DOI: 10.1038/cmi.2014.127] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 11/21/2014] [Accepted: 11/22/2014] [Indexed: 12/14/2022] Open
Abstract
Infection with hepatitis C virus (HCV), a major viral cause of chronic liver disease, frequently progresses to steatosis and cirrhosis, which can lead to hepatocellular carcinoma. HCV infection strongly induces host responses, such as the activation of the unfolded protein response, autophagy and the innate immune response. Upon HCV infection, the host induces the interferon (IFN)-mediated frontline defense to limit virus replication. Conversely, HCV employs diverse strategies to escape host innate immune surveillance. Type I IFN elicits its antiviral actions by inducing a wide array of IFN-stimulated genes (ISGs). Nevertheless, the mechanisms by which these ISGs participate in IFN-mediated anti-HCV actions remain largely unknown. In this review, we first outline the signaling pathways known to be involved in the production of type I IFN and ISGs and the tactics that HCV uses to subvert innate immunity. Then, we summarize the effector mechanisms of scaffold ISGs known to modulate IFN function in HCV replication. We also highlight the potential functions of emerging ISGs, which were identified from genome-wide siRNA screens, in HCV replication. Finally, we discuss the functions of several cellular determinants critical for regulating host immunity in HCV replication. This review will provide a basis for understanding the complexity and functionality of the pleiotropic IFN system in HCV infection. Elucidation of the specificity and the mode of action of these emerging ISGs will also help to identify novel cellular targets against which effective HCV therapeutics can be developed.
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Emerging roles of interferon-stimulated genes in the innate immune response to hepatitis C virus infection. Cell Mol Immunol 2014; 11:218-20. [PMID: 25544499 DOI: 10.1038/cmi.2014.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 01/03/2014] [Accepted: 01/06/2014] [Indexed: 12/16/2022] Open
Abstract
Infection with hepatitis C virus (HCV), a major viral cause of chronic liver disease, frequently progresses to steatosis and cirrhosis, which can lead to hepatocellular carcinoma. HCV infection strongly induces host responses, such as the activation of the unfolded protein response, autophagy and the innate immune response. Upon HCV infection, the host induces the interferon (IFN)-mediated frontline defense to limit virus replication. Conversely, HCV employs diverse strategies to escape host innate immune surveillance. Type I IFN elicits its antiviral actions by inducing a wide array of IFN-stimulated genes (ISGs). Nevertheless, the mechanisms by which these ISGs participate in IFN-mediated anti-HCV actions remain largely unknown. In this review, we first outline the signaling pathways known to be involved in the production of type I IFN and ISGs and the tactics that HCV uses to subvert innate immunity. Then, we summarize the effector mechanisms of scaffold ISGs known to modulate IFN function in HCV replication. We also highlight the potential functions of emerging ISGs, which were identified from genome-wide siRNA screens, in HCV replication. Finally, we discuss the functions of several cellular determinants critical for regulating host immunity in HCV replication. This review will provide a basis for understanding the complexity and functionality of the pleiotropic IFN system in HCV infection. Elucidation of the specificity and the mode of action of these emerging ISGs will also help to identify novel cellular targets against which effective HCV therapeutics can be developed.
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40
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Lai CK, Saxena V, Tseng CH, Jeng KS, Kohara M, Lai MMC. Nonstructural protein 5A is incorporated into hepatitis C virus low-density particle through interaction with core protein and microtubules during intracellular transport. PLoS One 2014; 9:e99022. [PMID: 24905011 PMCID: PMC4048239 DOI: 10.1371/journal.pone.0099022] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 05/09/2014] [Indexed: 01/16/2023] Open
Abstract
Nonstructural protein 5A (NS5A) of hepatitis C virus (HCV) serves dual functions in viral RNA replication and virus assembly. Here, we demonstrate that HCV replication complex along with NS5A and Core protein was transported to the lipid droplet (LD) through microtubules, and NS5A-Core complexes were then transported from LD through early-to-late endosomes to the plasma membrane via microtubules. Further studies by cofractionation analysis and immunoelectron microscopy of the released particles showed that NS5A-Core complexes, but not NS4B, were present in the low-density fractions, but not in the high-density fractions, of the HCV RNA-containing virions and associated with the internal virion core. Furthermore, exosomal markers CD63 and CD81 were also detected in the low-density fractions, but not in the high-density fractions. Overall, our results suggest that HCV NS5A is associated with the core of the low-density virus particles which exit the cell through a preexisting endosome/exosome pathway and may contribute to HCV natural infection.
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Affiliation(s)
- Chao-Kuen Lai
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
- Graduate Institute of Toxicology, National Taiwan University, Taipei, Taiwan
| | - Vikas Saxena
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
| | - Chung-Hsin Tseng
- Department of Microbiology and Immunology, and Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan, Taiwan
| | - King-Song Jeng
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
| | - Michinori Kohara
- Department of Microbiology and Cell Biology, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Michael M. C. Lai
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
- Department of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, California, United States of America
- Department of Microbiology and Immunology, and Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan, Taiwan
- * E-mail:
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41
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Interaction of Hepatitis C Viral Proteins with Cellular Oncoproteins in the Induction of Liver Cancer. ACTA ACUST UNITED AC 2014. [DOI: 10.1155/2014/351407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Hepatitis C virus infection is a major health problem all over the world. A large proportion of patients infected by HCV develop liver cirrhosis or cancer. However, the mechanism(s) remain to be elucidated. Since HCV does not carry any known oncogene, it is thought that interaction between virally encoded proteins and host proteins is responsible for carcinogenesis. Many crucial interactions between HCV-encoded proteins and host proteins have been reported. In this review we focus on the interaction of viral proteins with important regulators of cell cycle—oncoproteins YB-1, p53, and cyclin D1—which play a major role in cell proliferation, apoptosis, DNA repair, and genomic stability. Genetic variants of HCV accumulate in patients and alter these interactions of host cell proteins. It is a battle between the virus and host and the final outcome depends on the winner; if the host succeeds in clearing the virus the patient may not develop serious liver diseases. On the other hand, if the virus dominates by evolving quasispecies which code for altered proteins that interact differently with host proteins, or induce mutations in host protooncogenes, then the patient may develop liver cirrhosis and/or liver cancer.
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42
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Dynamic imaging of the hepatitis C virus NS5A protein during a productive infection. J Virol 2014; 88:3636-52. [PMID: 24429364 DOI: 10.1128/jvi.02490-13] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
UNLABELLED Hepatitis C virus (HCV) NS5A is essential for viral genome replication within cytoplasmic replication complexes and virus assembly at the lipid droplet (LD) surface, although its definitive functions are poorly understood. We developed approaches to investigate NS5A dynamics during a productive infection. We report here that NS5A motility and efficient HCV RNA replication require the microtubule network and the cytoplasmic motor dynein and demonstrate that both motile and relatively static NS5A-positive foci are enriched with host factors VAP-A and Rab5A. Pulse-chase imaging revealed that newly synthesized NS5A foci are small and distinct from aged foci, while further studies using a unique dual fluorescently tagged infectious HCV chimera showed a relatively stable association of NS5A foci with core-capped LDs. These results reveal new details about the dynamics and maturation of NS5A and the nature of potential sites of convergence of HCV replication and assembly pathways. IMPORTANCE Hepatitis C virus (HCV) is a major cause of serious liver disease worldwide. An improved understanding of the HCV replication cycle will enable development of novel and improved antiviral strategies. Here we have developed complementary fluorescent labeling and imaging approaches to investigate the localization, traffic and interactions of the HCV NS5A protein in living, virus-producing cells. These studies reveal new details as to the traffic, composition and biogenesis of NS5A foci and the nature of their association with putative sites of virus assembly.
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Ali N, Allam H, Bader T, May R, Basalingappa KM, Berry WL, Chandrakesan P, Qu D, Weygant N, Bronze MS, Umar S, Janknecht R, Sureban SM, Huycke M, Houchen CW. Fluvastatin interferes with hepatitis C virus replication via microtubule bundling and a doublecortin-like kinase-mediated mechanism. PLoS One 2013; 8:e80304. [PMID: 24260365 PMCID: PMC3833963 DOI: 10.1371/journal.pone.0080304] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 10/11/2013] [Indexed: 12/18/2022] Open
Abstract
Hepatitis C virus (HCV)-induced alterations in lipid metabolism and cellular protein expression contribute to viral pathogenesis. The mechanism of pleiotropic actions of cholesterol-lowering drugs, statins, against HCV and multiple cancers are not well understood. We investigated effects of fluvastatin (FLV) on microtubule-associated and cancer stem cell marker (CSC), doublecortin-like kinase 1 (DCLK1) during HCV-induced hepatocarcinogenesis. HCV replication models, cancer cell lines and normal human hepatocytes were used to investigate the antiviral and antitumor effects of statins. FLV treatment resulted in induction of microtubule bundling, cell-cycle arrest and alterations in cellular DCLK1 distribution in HCV-expressing hepatoma cells. These events adversely affected the survival of liver-derived tumor cells without affecting normal human hepatocytes. FLV downregulated HCV replication in cell culture where the ATP pool and cell viability were not compromised. Pravastatin did not exhibit these effects on HCV replication, microtubules and cancer cells. The levels of miR-122 that regulates liver homeostasis and provides HCV genomic stability remained at steady state whereas DCLK1 mRNA levels were considerably reduced during FLV treatment. We further demonstrated that HCV replication was increased with DCLK1 overexpression. In conclusion, unique effects of FLV on microtubules and their binding partner DCLK1 are likely to contribute to its anti-HCV and antitumor activities in addition to its known inhibitory effects on 3-hydroxy-3-methylglutary-CoA reductase (HMGCR).
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Affiliation(s)
- Naushad Ali
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Department of Veterans Affairs Medical Center, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- * E-mail: (NA); (CWH)
| | - Heba Allam
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Department of Microbiology and Immunology, National Liver Institute, Menoufiya University, Menoufiya, Egypt
| | - Ted Bader
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Department of Veterans Affairs Medical Center, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
| | - Randal May
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Department of Veterans Affairs Medical Center, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
| | - Kanthesh M. Basalingappa
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
| | - William L. Berry
- Department of Cell Biology, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
| | - Parthasarathy Chandrakesan
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
| | - Dongfeng Qu
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
| | - Nathaniel Weygant
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
| | - Michael S. Bronze
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
| | - Shahid Umar
- Department of Molecular and Integrative Physiology, and Medicine, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Ralf Janknecht
- Department of Cell Biology, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
| | - Sripathi M. Sureban
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Department of Veterans Affairs Medical Center, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
| | - Mark Huycke
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Department of Veterans Affairs Medical Center, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
| | - Courtney W. Houchen
- Department of Medicine, Section of Digestive Diseases and Nutrition, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- Department of Veterans Affairs Medical Center, University of Oklahoma, Oklahoma City, Oklahoma, United States of America
- * E-mail: (NA); (CWH)
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Bukong TN, Kodys K, Szabo G. Human ezrin-moesin-radixin proteins modulate hepatitis C virus infection. Hepatology 2013; 58:1569-79. [PMID: 23703860 PMCID: PMC3772999 DOI: 10.1002/hep.26500] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 04/26/2013] [Indexed: 12/22/2022]
Abstract
UNLABELLED Host cytoskeletal proteins of the ezrin-moesin-radixin (EMR) family have been shown to modulate single-stranded RNA virus infection through regulating stable microtubule formation. Antibody engagement of CD81, a key receptor for hepatitis C virus (HCV) entry, induces ezrin phosphorylation. Here we tested the role of EMR proteins in regulating HCV infection and explored potential therapeutic targets. We show that HCV E2 protein induces rapid ezrin phosphorylation and its cellular redistribution with F-actin by way of spleen tyrosine kinase (SYK). Therapeutically blocking the functional roles of SYK or F-actin reorganization significantly reduced Huh7.5 cell susceptibility to HCV J6/JFH-1 infection. Using gene regulation, real-time quantitative polymerase chain reaction, western blot, and fluorescent microscopy analysis, we found that proteins of the EMR family differentially regulate HCV infection in the J6/JFH-1/Huh7.5 cell system. Moesin and radixin, but not ezrin, expression were significantly decreased in chronic HCV J6/JFH-1-infected Huh7.5 cells and HCV-infected patient liver biopsies compared to controls. The decreases in moesin and radixin in HCV J6/JFH-1-infected Huh7.5 cells were associated with a significant increase in stable microtubules. Ezrin knockdown inhibited immediate postentry events in HCV infection. Overexpression of moesin or radixin significantly reduced HCV protein expression. In contrast, transient knockdown of moesin or radixin augmented HCV infection. Making use of the Con1 HCV replicon system, we tested the effect of EMR proteins on HCV replication. We found that transient knockdown of moesin increased HCV RNA expression while overexpression of EMR showed no significant effect on HCV replication. CONCLUSION Our findings demonstrate the important role of EMR proteins during HCV infection at the postentry level and highlight possible novel targets for HCV treatment.
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Affiliation(s)
| | | | - Gyongyi Szabo
- Contact Information: Gyongyi Szabo, MD, PhD, Department of Medicine, University of Massachusetts Medical School, LRB208, 364 Plantation Street, Worcester, MA 01605, USA; Tel: 001-508-856-5275; Fax: 001-508-856-4770;
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Germain MA, Chatel-Chaix L, Gagné B, Bonneil É, Thibault P, Pradezynski F, de Chassey B, Meyniel-Schicklin L, Lotteau V, Baril M, Lamarre D. Elucidating novel hepatitis C virus-host interactions using combined mass spectrometry and functional genomics approaches. Mol Cell Proteomics 2013; 13:184-203. [PMID: 24169621 DOI: 10.1074/mcp.m113.030155] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
More than 170 million people worldwide are infected with the hepatitis C virus (HCV), for which future therapies are expected to rely upon a combination of oral antivirals. For a rapidly evolving virus like HCV, host-targeting antivirals are an attractive option. To decipher the role of novel HCV-host interactions, we used a proteomics approach combining immunoprecipitation of viral-host protein complexes coupled to mass spectrometry identification and functional genomics RNA interference screening of HCV partners. Here, we report the proteomics analyses of protein complexes associated with Core, NS2, NS3/4A, NS4B, NS5A, and NS5B proteins. We identified a stringent set of 98 human proteins interacting specifically with one of the viral proteins. The overlap with previous virus-host interaction studies demonstrates 24.5% shared HCV interactors overall (24/98), illustrating the reliability of the approach. The identified human proteins show enriched Gene Ontology terms associated with the endoplasmic reticulum, transport proteins with a major contribution of NS3/4A interactors, and transmembrane proteins for Core interactors. The interaction network emphasizes a high degree distribution, a high betweenness distribution, and high interconnectivity of targeted human proteins, in agreement with previous virus-host interactome studies. The set of HCV interactors also shows extensive enrichment for known targets of other viruses. The combined proteomic and gene silencing study revealed strong enrichment in modulators of HCV RNA replication, with the identification of 11 novel cofactors among our set of specific HCV partners. Finally, we report a novel immune evasion mechanism of NS3/4A protein based on its ability to affect nucleocytoplasmic transport of type I interferon-mediated signal transducer and activator of transcription 1 nuclear translocation. The study revealed highly stringent association between HCV interactors and their functional contribution to the viral replication cycle and pathogenesis.
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Affiliation(s)
- Marie-Anne Germain
- Institut de Recherche en Immunologie et en Cancérologie (IRIC), Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal, Québec H3C 3J7, Canada
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46
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Dolan PT, Zhang C, Khadka S, Arumugaswami V, Vangeloff AD, Heaton NS, Sahasrabudhe S, Randall G, Sun R, LaCount DJ. Identification and comparative analysis of hepatitis C virus-host cell protein interactions. MOLECULAR BIOSYSTEMS 2013; 9:3199-209. [PMID: 24136289 DOI: 10.1039/c3mb70343f] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Hepatitis C virus (HCV) alters the global behavior of the host cell to create an environment conducive to its own replication, but much remains unknown about how HCV proteins elicit these changes. Thus, a better understanding of the interface between the virus and host cell is required. Here we report the results of a large-scale yeast two-hybrid screen to identify protein-protein interactions between HCV genotype 2a (strain JFH1) and cellular factors. Our study identified 112 unique interactions between 7 HCV and 94 human proteins, over 40% of which have been linked to HCV infection by other studies. These interactions develop a more complete picture of HCV infection, providing insight into HCV manipulation of pathways, such as lipid and cholesterol metabolism, that were previously linked to HCV infection and implicating novel targets within microtubule-organizing centers, the complement system and cell cycle regulatory machinery. In an effort to understand the relationship between HCV and related viruses, we compared the HCV 2a interactome to those of other HCV genotypes and to the related dengue virus. Greater overlap was observed between HCV and dengue virus targets than between HCV genotypes, demonstrating the value of parallel screening approaches when comparing virus-host cell interactomes. Using siRNAs to inhibit expression of cellular proteins, we found that five of the ten shared targets tested (CUL7, PCM1, RILPL2, RNASET2, and TCF7L2) were required for replication of both HCV and dengue virus. These shared interactions provide insight into common features of the viral life cycles of the family Flaviviridae.
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Affiliation(s)
- Patrick T Dolan
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, RHPH 514, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA.
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A host YB-1 ribonucleoprotein complex is hijacked by hepatitis C virus for the control of NS3-dependent particle production. J Virol 2013; 87:11704-20. [PMID: 23986595 DOI: 10.1128/jvi.01474-13] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Hepatitis C virus (HCV) orchestrates the different stages of its life cycle in time and space through the sequential participation of HCV proteins and cellular machineries; hence, these represent tractable molecular host targets for HCV elimination by combination therapies. We recently identified multifunctional Y-box-binding protein 1 (YB-1 or YBX1) as an interacting partner of NS3/4A protein and HCV genomic RNA that negatively regulates the equilibrium between viral translation/replication and particle production. To identify novel host factors that regulate the production of infectious particles, we elucidated the YB-1 interactome in human hepatoma cells by a quantitative mass spectrometry approach. We identified 71 YB-1-associated proteins that included previously reported HCV regulators DDX3, heterogeneous nuclear RNP A1, and ILF2. Of the potential YB-1 interactors, 26 proteins significantly modulated HCV replication in a gene-silencing screening. Following extensive interaction and functional validation, we identified three YB-1 partners, C1QBP, LARP-1, and IGF2BP2, that redistribute to the surface of core-containing lipid droplets in HCV JFH-1-expressing cells, similarly to YB-1 and DDX6. Importantly, knockdown of these proteins stimulated the release and/or egress of HCV particles without affecting virus assembly, suggesting a functional YB-1 protein complex that negatively regulates virus production. Furthermore, a JFH-1 strain with the NS3 Q221L mutation, which promotes virus production, was less sensitive to this negative regulation, suggesting that this HCV-specific YB-1 protein complex modulates an NS3-dependent step in virus production. Overall, our data support a model in which HCV hijacks host cell machinery containing numerous RNA-binding proteins to control the equilibrium between viral RNA replication and NS3-dependent late steps in particle production.
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Tripathi LP, Kambara H, Chen YA, Nishimura Y, Moriishi K, Okamoto T, Morita E, Abe T, Mori Y, Matsuura Y, Mizuguchi K. Understanding the Biological Context of NS5A–Host Interactions in HCV Infection: A Network-Based Approach. J Proteome Res 2013; 12:2537-51. [DOI: 10.1021/pr3011217] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Lokesh P. Tripathi
- National Institute of Biomedical Innovation, 7-6-8 Saito Asagi, Ibaraki,
Osaka, 567-0085, Japan
| | - Hiroto Kambara
- Department of Molecular Virology,
Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Yi-An Chen
- National Institute of Biomedical Innovation, 7-6-8 Saito Asagi, Ibaraki,
Osaka, 567-0085, Japan
| | - Yorihiro Nishimura
- Department of Molecular Virology,
Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Kohji Moriishi
- Department of Molecular Virology,
Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Toru Okamoto
- Department of Molecular Virology,
Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Eiji Morita
- Department of Molecular Virology,
Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Takayuki Abe
- Department of Molecular Virology,
Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Yoshio Mori
- Department of Molecular Virology,
Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Yoshiharu Matsuura
- Department of Molecular Virology,
Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Kenji Mizuguchi
- National Institute of Biomedical Innovation, 7-6-8 Saito Asagi, Ibaraki,
Osaka, 567-0085, Japan
- Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamada-Oka, Suita, Osaka, 565-0871,
Japan
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Jia KT, Liu ZY, Guo CJ, Xia Q, Mi S, Li XD, Weng SP, He JG. The potential role of microfilaments in host cells for infection with infectious spleen and kidney necrosis virus infection. Virol J 2013; 10:77. [PMID: 23497248 PMCID: PMC3599308 DOI: 10.1186/1743-422x-10-77] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 02/27/2013] [Indexed: 01/16/2023] Open
Abstract
Background Infectious spleen and kidney necrosis virus (ISKNV) belongs to the genus Megalocytivirus from the family Iridoviridae. Megalocytivirus causes severe economic losses to tropical freshwater and marine culture industry in Asian countries and is devastating to the mandarin fish farm industry in China particularly. Methods We investigated the involvement of microfilaments in the early and late stages of ISKNV infection in MFF-1 cells by selectively perturbing their architecture using well-characterized inhibitors of actin dynamics. The effect of disruption of actin cytoskeleton on ISKNV infection was evaluated by indirect immunofluorescence analysis or real-time quantitative PCR. Results The depolymerization of the actin filaments with cytochalasin D, cytochalasin B, or latrunculin A reduced ISKNV infection. Furthermore, depolymerization of filamentous actin by inhibitors did not inhibit binding of the virus but affected virus internalization in the early stages of infection. In addition, the depolymerization of actin filaments reduced total ISKNV production in the late stages of ISKNV. Conclusions This study demonstrated that ISKNV required an intact actin network during infection. The findings will help us to better understand how iridoviruses exploit the cytoskeleton to facilitate their infection and subsequent disease.
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Affiliation(s)
- Kun-tong Jia
- MOE Key Laboratory of Aquatic Product Safety/State Key Laboratory for Biocontrol, School of Marine Sciences, Sun Yat-sen University, 135 Xingang Road West, Guangzhou, PR China
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Gushchin VA, Solovyev AG, Erokhina TN, Morozov SY, Agranovsky AA. Beet yellows virus replicase and replicative compartments: parallels with other RNA viruses. Front Microbiol 2013; 4:38. [PMID: 23508802 PMCID: PMC3589766 DOI: 10.3389/fmicb.2013.00038] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Accepted: 02/14/2013] [Indexed: 11/25/2022] Open
Abstract
In eukaryotic virus systems, infection leads to induction of membranous compartments in which replication occurs. Virus-encoded subunits of the replication complex mediate its interaction with membranes. As replication platforms, RNA viruses use the cytoplasmic surfaces of different membrane compartments, e.g., endoplasmic reticulum (ER), Golgi, endo/lysosomes, mitochondria, chloroplasts, and peroxisomes. Closterovirus infections are accompanied by formation of multivesicular complexes from cell membranes of ER or mitochondrial origin. So far the mechanisms for vesicles formation have been obscure. In the replication-associated 1a polyprotein of Beet yellows virus (BYV) and other closteroviruses, the region between the methyltransferase and helicase domains (1a central region (CR), 1a CR) is marginally conserved. Computer-assisted analysis predicts several putative membrane-binding domains in the BYV 1a CR. Transient expression of a hydrophobic segment (referred to here as CR-2) of the BYV 1a in Nicotiana benthamiana led to reorganization of the ER and formation of ~1-μm mobile globules. We propose that the CR-2 may be involved in the formation of multivesicular complexes in BYV-infected cells. This provides analogy with membrane-associated proteins mediating the build-up of “virus factories” in cells infected with diverse positive-strand RNA viruses (alpha-like viruses, picorna-like viruses, flaviviruses, and nidoviruses) and negative-strand RNA viruses (bunyaviruses).
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