CAS Wuhan Institute of Virology

Wuhan, China

CAS Wuhan Institute of Virology

Wuhan, China
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Agency: European Commission | Branch: H2020 | Program: RIA | Phase: INFRAIA-1-2014-2015 | Award Amount: 12.17M | Year: 2015

The overall objective will be to create and mobilise an International network of high calibre centres around a strong European group of institutes selected for their appropriate expertises, to collect, amplify, characterise, standardise, authenticate, distribute and track, mammalian and other exotic viruses. The network of EVAg laboratories including 25 institutions represents an extensive range of virological disciplines. The architecture of the consortium is based on the association of capacities accessible to the partners but also to any end-users through the EVAg web-based catalogue. This concept has been elaborated and tested for its efficiency during the successful EVA project (FP7). The project will integrate more facilities dedicated to high risk pathogen (HRP) manipulation (1 in EVA, 13 in EVAg) The access to products derived from those HRP will be enhanced and for instance the production of diagnostic reagents will be facilitated. The new project will also provide access to high containment biosafety facilities to carry out in vivo studies of infectious disease using natural or models hosts, to look at prophylactic or therapeutic control measures and to develop materials for the evaluation of diagnostic tests, meaning an extensive capacity to service and to training. EVAg will also link up with other network-based virus-associated programmes that exist globally. However, looking further ahead, EVAg is conceived ultimately to be an open entity aiming at developing synergies and complementarity capabilities in such a way as to offer an improved access to researchers. This project will generate the largest collection of mammalian viruses in the world and move beyond the current state-of-the-art to provide an increasingly valuable resource and service to the worlds scientific community, including government health departments, higher education institutes, industry and, through information systems, the general public.

Zhang X.,University of California at Los Angeles | Jin L.,University of California at Los Angeles | Fang Q.,CAS Wuhan Institute of Virology | Hui W.H.,University of California at Los Angeles | Zhou Z.H.,University of California at Los Angeles
Cell | Year: 2010

To achieve cell entry, many nonenveloped viruses must transform from a dormant to a primed state. In contrast to the membrane fusion mechanism of enveloped viruses (e.g., influenza virus), this membrane penetration mechanism is poorly understood. Here, using single-particle cryo-electron microscopy, we report a 3.3 Å structure of the primed, infectious subvirion particle of aquareovirus. The density map reveals side-chain densities of all types of amino acids (except glycine), enabling construction of a full-atom model of the viral particle. Our structure and biochemical results show that priming involves autocleavage of the membrane penetration protein and suggest that Lys84 and Glu76 may facilitate this autocleavage in a nucleophilic attack. We observe a myristoyl group, covalently linked to the N terminus of the penetration protein and embedded in a hydrophobic pocket. These results suggest a well-orchestrated process of nonenveloped virus entry involving autocleavage of the penetration protein prior to exposure of its membrane-insertion finger. PaperFlick: © 2010 Elsevier Inc.

Lu G.,CAS Wuhan Institute of Virology | Lu G.,University of Chinese Academy of Sciences | Gong P.,CAS Wuhan Institute of Virology
PLoS Pathogens | Year: 2013

The flavivirus NS5 harbors a methyltransferase (MTase) in its N-terminal ≈265 residues and an RNA-dependent RNA polymerase (RdRP) within the C-terminal part. One of the major interests and challenges in NS5 is to understand the interplay between RdRP and MTase as a unique natural fusion protein in viral genome replication and cap formation. Here, we report the first crystal structure of the full-length flavivirus NS5 from Japanese encephalitis virus. The structure completes the vision for polymerase motifs F and G, and depicts defined intra-molecular interactions between RdRP and MTase. Key hydrophobic residues in the RdRP-MTase interface are highly conserved in flaviviruses, indicating the biological relevance of the observed conformation. Our work paves the way for further dissection of the inter-regulations of the essential enzymatic activities of NS5 and exploration of possible other conformations of NS5 under different circumstances. © 2013 Lu and Gong.

Cui Z.Q.,CAS Wuhan Institute of Virology
Nanoscale | Year: 2011

The fluorescence labeling of viruses is a useful technology for virus detection and imaging. By combining the excellent fluorescence properties of quantum dots (QDs) with the high affinity and specificity of aptamers, we constructed a QD-aptamer probe. The aptamer A22, against the hemagglutinin of influenza A virus, was linked to QDs, producing the QD-A22 probe. Fluorescence imaging and transmission electron microscopy showed that the QD-A22 probe could specifically recognize and label influenza A virus particles. This QD labeling technique provides a new strategy for labeling virus particles for virus detection and imaging.

Sun X.,CAS Wuhan Institute of Virology
Viruses | Year: 2015

The use of insect viruses as biological control agents started in the early 1960s in China. To date, more than 32 viruses have been used to control insect pests in agriculture, forestry, pastures, and domestic gardens in China. In 2014, 57 products from 11 viruses were authorized as commercial viral insecticides by the Ministry of Agriculture of China. Approximately 1600 tons of viral insecticidal formulations have been produced annually in recent years, accounting for about 0.2% of the total insecticide output of China. The development and use of Helicoverpa armigera nucleopolyhedrovirus, Mamestra brassicae nucleopolyhedrovirus, Spodoptera litura nucleopolyhedrovirus, and Periplaneta fuliginosa densovirus are discussed as case studies. Additionally, some baculoviruses have been genetically modified to improve their killing rate, infectivity, and ultraviolet resistance. In this context, the biosafety assessment of a genetically modified Helicoverpa armigera nucleopolyhedrovirus is discussed. © 2015 by the authors; licensee MDPI, Basel, Switzerland.

Yang Y.,CAS Wuhan Institute of Virology
Cell Research | Year: 2016

Recognition of viral dsRNA by Toll-like receptor 3 (TLR3) leads to induction of interferons (IFNs) and proinflammatory cytokines, and innate antiviral response. Here we identified the RNA-binding protein Mex3B as a positive regulator of TLR3-mediated signaling by expression cloning screens. Cells from Mex3b-/- mice exhibited reduced production of IFN-β in response to the dsRNA analog poly(I:C) but not infection with RNA viruses. Mex3b-/- mice injected with poly(I:C) was more resistant to poly(I:C)-induced death. Mex3B was associated with TLR3 in the endosomes. It bound to dsRNA and increased the dsRNA-binding activity of TLR3. Mex3B also promoted the proteolytic processing of TLR3, which is critical for its activation. Mutants of Mex3B lacking its RNA-binding activity inhibited TLR3-mediated IFN-β induction. These findings suggest that Mex3B acts as a coreceptor of TLR3 in innate antiviral response.Cell Research advance online publication 29 January 2016; doi:10.1038/cr.2016.16. © 2016 Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences

Shi Z.L.,CAS Wuhan Institute of Virology
Science China Life Sciences | Year: 2013

Bats play important roles as pollen disseminators and pest predators. However, recent interest has focused on their role as natural reservoirs of pathogens associated with emerging infectious diseases. Prior to the outbreak of severe acute respiratory syndrome (SARS), about 60 bat virus species had been reported. The number of identified bat viruses has dramatically increased since the initial SARS outbreak, and most are putative novel virus species or genotypes. Serious infectious diseases caused by previously identified bat viruses continue to emerge throughout in Asia, Australia, Africa and America. Intriguingly, bats infected by these different viruses seldom display clinical symptoms of illness. The pathogenesis and potential threat of bat-borne viruses to public health remains largely unknown. This review provides a brief overview of bat viruses associated with emerging human infectious diseases. © 2013 The Author(s).

CAS Wuhan Institute of Virology | Date: 2014-06-24

The present invention provides a CD81 and OCLN double transgenic mouse and its construction method and use. The double transgenic mouse can be used to constitute acute and chronic HCV infection in a mouse model.

CAS Wuhan Institute of Virology | Date: 2011-12-29

The present invention provides a vaccine composition for dental caries caused by S. mutans infection, where the vaccine composition comprises an antigen derived from a surface protein PAc of S. mutans and an adjuvant derived from flagellin. The present invention further provides methods for preparing the vaccine composition. The present invention also provides methods for preventing or curing dental caries caused by S. mutans by administrating to a subject the vaccine composition.

CAS Wuhan Institute of Virology | Date: 2015-04-29

The present invention provides a CD81 and OCLN double transgenic mouse and its construction method and use. The double transgenic mouse can be used to constitute acute and chronic HCV infection in a mouse model.

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