1
|
Kong J, Shao G, Zhang Y, Wang J, Xie Z, Feng K, Zhang X, Xie Q. Molecular characterization, complete genome sequencing, and pathogenicity of Novel Duck Reovirus from South Coastal Area in China. Poult Sci 2023; 102:102776. [PMID: 37302330 PMCID: PMC10276289 DOI: 10.1016/j.psj.2023.102776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 05/04/2023] [Indexed: 06/13/2023] Open
Abstract
Novel Duck Reovirus (NDRV) that has been found throughout the world in waterfowl, and it has been extensively described. Here, we report the complete genome sequence of a NDRV strain isolated in China called NDRV YF10. This strain was collected from 87 samples with infected ducks in South Coastal Area. The NDRV genome consists of 23,419 bp. With the assistance of computer analysis, the promoter and terminator of each gene segment and 10 viral genes segments were identified, which encode polypeptides ranging from 98 to 1,294 amino acids. All gene fragments of this virus strain were determined and compared to previously reported strains, revealing genetic variation with similarity rates ranging from 96 to 99% for each gene segment. Each gene segment formed 2 host-associated groups, the waterfowl-derived reovirus and the avian-derived reovirus, except for the S1 gene segment, which was closely related to ARV evolution and formed a host-independent subcluster. This difference may be due to Avian Reovirus (ARV) evolving in a host-dependent manner. In order to evaluate the pathogenicity of YF10, a novel isolated strain of NDRV was tested in 2 types of ducks. It was observed that the YF10 isolated strain exhibits varying degrees of virulence, highlighting the potential risk posed to different types of ducks. In conclusion, our findings emphasize the importance of epidemiology studies, molecular characterization, and prevention of NDRV in waterfowl.
Collapse
Affiliation(s)
- Jie Kong
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science and Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, Guangzhou 510642, PR China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, PR China; Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, PR China
| | - Guanming Shao
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science and Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, Guangzhou 510642, PR China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, PR China; Zhongshan Innovation Center of South China Agricultural University, Zhongshan 528400, PR China; Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, PR China
| | - Yukun Zhang
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science and Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, Guangzhou 510642, PR China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, PR China; Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, PR China
| | - Jinfeng Wang
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science and Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, Guangzhou 510642, PR China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, PR China; Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, PR China
| | - Zi Xie
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science and Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, Guangzhou 510642, PR China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, PR China; Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, PR China
| | - Keyu Feng
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science and Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, Guangzhou 510642, PR China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, PR China; Zhongshan Innovation Center of South China Agricultural University, Zhongshan 528400, PR China; Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, Guangzhou 510642, PR China; Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, PR China
| | - Xinheng Zhang
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science and Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, Guangzhou 510642, PR China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, PR China; Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, Guangzhou 510642, PR China; Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, PR China
| | - Qingmei Xie
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science and Veterinary Medicine, South China Agricultural University, Guangzhou 510642, PR China; Guangdong Engineering Research Center for Vector Vaccine of Animal Virus, Guangzhou 510642, PR China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, PR China; Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangdong, Guangzhou 510642, PR China; Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, PR China.
| |
Collapse
|
2
|
Bhat T, Cao A, Yin J. Virus-like Particles: Measures and Biological Functions. Viruses 2022; 14:383. [PMID: 35215979 PMCID: PMC8877645 DOI: 10.3390/v14020383] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/10/2022] [Accepted: 02/10/2022] [Indexed: 12/25/2022] Open
Abstract
Virus-like particles resemble infectious virus particles in size, shape, and molecular composition; however, they fail to productively infect host cells. Historically, the presence of virus-like particles has been inferred from total particle counts by microscopy, and infectious particle counts or plaque-forming-units (PFUs) by plaque assay; the resulting ratio of particles-to-PFUs is often greater than one, easily 10 or 100, indicating that most particles are non-infectious. Despite their inability to hijack cells for their reproduction, virus-like particles and the defective genomes they carry can exhibit a broad range of behaviors: interference with normal virus growth during co-infections, cell killing, and activation or inhibition of innate immune signaling. In addition, some virus-like particles become productive as their multiplicities of infection increase, a sign of cooperation between particles. Here, we review established and emerging methods to count virus-like particles and characterize their biological functions. We take a critical look at evidence for defective interfering virus genomes in natural and clinical isolates, and we review their potential as antiviral therapeutics. In short, we highlight an urgent need to better understand how virus-like genomes and particles interact with intact functional viruses during co-infection of their hosts, and their impacts on the transmission, severity, and persistence of virus-associated diseases.
Collapse
Affiliation(s)
| | | | - John Yin
- Department of Chemical and Biological Engineering, Wisconsin Institute for Discovery, University of Wisconsin-Madison, 330 N. Orchard Street, Madison, WI 53715, USA; (T.B.); (A.C.)
| |
Collapse
|
3
|
Smith SC, Gribble J, Diller JR, Wiebe MA, Thoner TW, Denison MR, Ogden KM. Reovirus RNA recombination is sequence directed and generates internally deleted defective genome segments during passage. J Virol 2021; 95:JVI.02181-20. [PMID: 33472930 PMCID: PMC8103698 DOI: 10.1128/jvi.02181-20] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 01/14/2021] [Indexed: 12/12/2022] Open
Abstract
For viruses with segmented genomes, genetic diversity is generated by genetic drift, reassortment, and recombination. Recombination produces RNA populations distinct from full-length gene segments and can influence viral population dynamics, persistence, and host immune responses. Viruses in the Reoviridae family, including rotavirus and mammalian orthoreovirus (reovirus), have been reported to package segments containing rearrangements or internal deletions. Rotaviruses with RNA segments containing rearrangements have been isolated from immunocompromised and immunocompetent children and in vitro following serial passage at relatively high multiplicity. Reoviruses that package small, defective RNA segments have established chronic infections in cells and in mice. However, the mechanism and extent of Reoviridae RNA recombination are undefined. Towards filling this gap in knowledge, we determined the titers and RNA segment profiles for reovirus and rotavirus following serial passage in cultured cells. The viruses exhibited occasional titer reductions characteristic of interference. Reovirus strains frequently accumulated segments that retained 5' and 3' terminal sequences and featured large internal deletions, while similarly fragmented segments were rarely detected in rotavirus populations. Using next-generation RNA-sequencing to analyze RNA molecules packaged in purified reovirus particles, we identified distinct recombination sites within individual viral genome segments. Recombination junctions were frequently but not always characterized by short direct sequence repeats upstream and downstream that spanned junction sites. Taken together, these findings suggest that reovirus accumulates defective gene segments featuring internal deletions during passage and undergoes sequence-directed recombination at distinct sites.IMPORTANCE Viruses in the Reoviridae family include important pathogens of humans and other animals and have segmented RNA genomes. Recombination in RNA virus populations can facilitate novel host exploration and increased disease severity. The extent, patterns, and mechanisms of Reoviridae recombination and the functions and effects of recombined RNA products are poorly understood. Here, we provide evidence that mammalian orthoreovirus regularly synthesizes RNA recombination products that retain terminal sequences but contain internal deletions, while rotavirus rarely synthesizes such products. Recombination occurs more frequently at specific sites in the mammalian orthoreovirus genome, and short regions of identical sequence are often detected at junction sites. These findings suggest that mammalian orthoreovirus recombination events are directed in part by RNA sequences. An improved understanding of recombined viral RNA synthesis may enhance our capacity to engineer improved vaccines and virotherapies in the future.
Collapse
Affiliation(s)
- Sydni Caet Smith
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center
| | - Jennifer Gribble
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center
| | - Julia R Diller
- Department of Pediatrics, Vanderbilt University Medical Center
| | - Michelle A Wiebe
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center
| | - Timothy W Thoner
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center
| | - Mark R Denison
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center
- Department of Pediatrics, Vanderbilt University Medical Center
| | - Kristen M Ogden
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center
- Department of Pediatrics, Vanderbilt University Medical Center
| |
Collapse
|
4
|
Borodavka A, Ault J, Stockley PG, Tuma R. Evidence that avian reovirus σNS is an RNA chaperone: implications for genome segment assortment. Nucleic Acids Res 2015; 43:7044-57. [PMID: 26109354 PMCID: PMC4538827 DOI: 10.1093/nar/gkv639] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 06/06/2015] [Accepted: 06/09/2015] [Indexed: 12/15/2022] Open
Abstract
Reoviruses are important human, animal and plant pathogens having 10-12 segments of double-stranded genomic RNA. The mechanisms controlling the assortment and packaging of genomic segments in these viruses, remain poorly understood. RNA-protein and RNA-RNA interactions between viral genomic segment precursors have been implicated in the process. While non-structural viral RNA-binding proteins, such as avian reovirus σNS, are essential for virus replication, the mechanism by which they assist packaging is unclear. Here we demonstrate that σNS assembles into stable elongated hexamers in vitro, which bind single-stranded nucleic acids with high affinity, but little sequence specificity. Using ensemble and single molecule fluorescence spectroscopy, we show that σNS also binds to a partially double-stranded RNA, resulting in gradual helix unwinding. The hexamer can bind multiple RNA molecules and exhibits strand-annealing activity, thus mediating conversion of metastable, intramolecular stem-loops into more stable heteroduplexes. We demonstrate that the ARV σNS acts as an RNA chaperone facilitating specific RNA-RNA interactions between genomic precursors during segment assortment and packaging.
Collapse
Affiliation(s)
- Alexander Borodavka
- School of Molecular and Cellular Biology & Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - James Ault
- School of Molecular and Cellular Biology & Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Peter G Stockley
- School of Molecular and Cellular Biology & Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Roman Tuma
- School of Molecular and Cellular Biology & Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK
| |
Collapse
|
5
|
van den Wollenberg DJM, Dautzenberg IJC, Ros W, Lipińska AD, van den Hengel SK, Hoeben RC. Replicating reoviruses with a transgene replacing the codons for the head domain of the viral spike. Gene Ther 2015; 22:267-79. [PMID: 25588743 DOI: 10.1038/gt.2014.126] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 11/18/2014] [Accepted: 12/02/2014] [Indexed: 01/29/2023]
Abstract
The capacity to modify the reovirus genome facilitates generation of new therapeutic reoviruses. We describe a method for generating replication-competent reoviruses carrying a heterologous transgene. The strategy is based on the expanded-tropism reovirus mutant jin-3, which can infect cells independent of the reovirus receptor junction-adhesion molecule A (JAM-A). Jin-3 harbors a mutation in the S1 segment, resulting in a G196R substitution in the tail of the spike protein σ1. The use of the jin-3 tail-encoding S1 segment allows replacing the codons for the JAM-A-binding head domain by up to 522 nucleotides of foreign sequences, without exceeding the size of the wild-type S1 segment. We inserted the codons for the porcine teschovirus-1 2A element fused with those encoding the fluorescent protein iLOV. Replicating rS1His-2A-iLOV reoviruses were generated by co-transfection of expression plasmids for all reovirus segments. These reoviruses contain the S1His-2A-iLOV segment in the absence of the wild-type S1 segment. Density-gradient centrifugation confirmed the association of the σ1-tail fragment with the capsid. Both JAM-A-positive and -negative cells exposed to the rS1His-2A-iLOV reoviruses exhibited iLOV fluorescence, confirming the jin-3-derived expanded-tropism phenotype. These data demonstrated the feasibility of generating decapitated replication-competent T3D reoviruses carrying a heterologous transgene.
Collapse
Affiliation(s)
| | - I J C Dautzenberg
- Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
| | - W Ros
- Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
| | - A D Lipińska
- Department of Virus Molecular Biology, Intercollegiate Faculty of Biotechnology UG-MUG, University of Gdańsk, Gdańsk, Poland
| | - S K van den Hengel
- Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
| | - R C Hoeben
- Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
| |
Collapse
|
6
|
Engineering recombinant reoviruses with tandem repeats and a tetravirus 2A-like element for exogenous polypeptide expression. Proc Natl Acad Sci U S A 2013; 110:E1867-76. [PMID: 23630248 DOI: 10.1073/pnas.1220107110] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We tested a strategy for engineering recombinant mammalian reoviruses (rMRVs) to express exogenous polypeptides. One important feature is that these rMRVs are designed to propagate autonomously and can therefore be tested in animals as potential vaccine vectors. The strategy has been applied so far to three of the 10 MRV genome segments: S3, M1, and L1. To engineer the modified segments, a 5' or 3' region of the essential, long ORF in each was duplicated, and then exogenous sequences were inserted between the repeats. The inner repeat and exogenous insert were positioned in frame with the native protein-encoding sequences but were separated from them by an in-frame "2A-like" sequence element that specifies a cotranslational "stop/continue" event releasing the exogenous polypeptide from the essential MRV protein. This design preserves a terminal region of the MRV genome segment with essential activities in RNA packaging, assortment, replication, transcription, and/or translation and alters the encoded MRV protein to a limited degree. Recovery of rMRVs with longer inserts was made more efficient by wobble-mutagenizing both the inner repeat and the exogenous insert, which possibly helped via respective reductions in homologous recombination and RNA structure. Immunogenicity of a 300-aa portion of the simian immunodeficiency virus Gag protein expressed in mice by an L1-modified rMRV was confirmed by detection of Gag-specific T-cell responses. The engineering strategy was further used for mapping the minimal 5'-terminal region essential to MRV genome segment S3.
Collapse
|
7
|
Tanaka T, Eusebio-Cope A, Sun L, Suzuki N. Mycoreovirus genome alterations: similarities to and differences from rearrangements reported for other reoviruses. Front Microbiol 2012; 3:186. [PMID: 22675320 PMCID: PMC3365852 DOI: 10.3389/fmicb.2012.00186] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Accepted: 05/04/2012] [Indexed: 11/13/2022] Open
Abstract
The family Reoviridae is one of the largest virus families with genomes composed of 9-12 double-stranded RNA segments. It includes members infecting organisms from protists to humans. It is well known that reovirus genomes are prone to various types of genome alterations including intragenic rearrangement and reassortment under laboratory and natural conditions. Recently distinct genetic alterations were reported for members of the genus Mycoreovirus, Mycoreovirus 1 (MyRV1), and MyRV3 with 11 (S1-S11) and 12 genome segments (S1-S12), respectively. While MyRV3 S8 is lost during subculturing of infected host fungal strains, MyRV1 rearrangements undergo alterations spontaneously and inducibly. The inducible MyRV1 rearrangements are different from any other previous examples of reovirus rearrangements in their dependence on an unrelated virus factor, a multifunctional protein, p29, encoded by a distinct virus Cryphonectria parasitica hypovirus 1 (CHV1). A total of 5 MyRV1 variants with genome rearranged segments (S1-S3, S6 and S10) are generated in the background of a single viral strain in the presence of CHV1 p29 supplied either transgenically or by coinfection. MyRV1 S4 and S10 are rearranged, albeit very infrequently, in a CHV1 p29 independent fashion. A variant of MyRV1 with substantial deletions in both S4 and S10, generated through a combined reassortment and rearrangement approach, shows comparable replication levels to the wild-type MyRV1. In vivo and in vitro interactions of CHV1 p29 and MyRV1 VP9 are implicated in the induction of MyRV1 rearrangements. However, the mechanism underlying p29-mediated rearrangements remains largely unknown. MyRV1 S4 rearrangements spontaneously occurred independently of CHV1 p29. In the absence of reverse genetics systems for mycoreoviruses, molecular and biological characterization of these MyRV1 and MyRV3 variants contribute to functional analyses of the protein products encoded by those rearranged segments.
Collapse
Affiliation(s)
- Toru Tanaka
- Agrivirology Laboratory, Institute of Plant Science and Bioresources, Okayama University Kurashiki, Okayama, Japan
| | | | | | | |
Collapse
|
8
|
Li W, Manktelow E, von Kirchbach JC, Gog JR, Desselberger U, Lever AM. Genomic analysis of codon, sequence and structural conservation with selective biochemical-structure mapping reveals highly conserved and dynamic structures in rotavirus RNAs with potential cis-acting functions. Nucleic Acids Res 2010; 38:7718-35. [PMID: 20671030 PMCID: PMC2995077 DOI: 10.1093/nar/gkq663] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 07/07/2010] [Accepted: 07/14/2010] [Indexed: 01/05/2023] Open
Abstract
Rotaviruses are a major cause of acute, often fatal, gastroenteritis in infants and young children world-wide. Virions contain an 11 segment double-stranded RNA genome. Little is known about the cis-acting sequences and structural elements of the viral RNAs. Using a database of 1621 full-length sequences of mammalian group A rotavirus RNA segments, we evaluated the codon, sequence and RNA structural conservation of the complete genome. Codon conservation regions were found in eight ORFs, suggesting the presence of functional RNA elements. Using ConStruct and RNAz programmes, we identified conserved secondary structures in the positive-sense RNAs including long-range interactions (LRIs) at the 5' and 3' terminal regions of all segments. In RNA9, two mutually exclusive structures were observed suggesting a switch mechanism between a conserved terminal LRI and an independent 3' stem-loop structure. In RNA6, a conserved stem-loop was found in a region previously reported to have translation enhancement activity. Biochemical structural analysis of RNA11 confirmed the presence of terminal LRIs and two internal helices with high codon and sequence conservation. These extensive in silico and in vitro analyses provide evidence of the conservation, complexity, multi-functionality and dynamics of rotavirus RNA structures which likely influence RNA replication, translation and genome packaging.
Collapse
Affiliation(s)
- Wilson Li
- Department of Medicine, University of Cambridge, Level 5, Addenbrooke’s Hospital, Hills Road, Cambridge CB2 0QQ and Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK
| | - Emily Manktelow
- Department of Medicine, University of Cambridge, Level 5, Addenbrooke’s Hospital, Hills Road, Cambridge CB2 0QQ and Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK
| | - Johann C. von Kirchbach
- Department of Medicine, University of Cambridge, Level 5, Addenbrooke’s Hospital, Hills Road, Cambridge CB2 0QQ and Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK
| | - Julia R. Gog
- Department of Medicine, University of Cambridge, Level 5, Addenbrooke’s Hospital, Hills Road, Cambridge CB2 0QQ and Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK
| | - Ulrich Desselberger
- Department of Medicine, University of Cambridge, Level 5, Addenbrooke’s Hospital, Hills Road, Cambridge CB2 0QQ and Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK
| | - Andrew M. Lever
- Department of Medicine, University of Cambridge, Level 5, Addenbrooke’s Hospital, Hills Road, Cambridge CB2 0QQ and Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK
| |
Collapse
|
9
|
Troupin C, Dehée A, Schnuriger A, Vende P, Poncet D, Garbarg-Chenon A. Rearranged genomic RNA segments offer a new approach to the reverse genetics of rotaviruses. J Virol 2010; 84:6711-9. [PMID: 20427539 PMCID: PMC2903292 DOI: 10.1128/jvi.00547-10] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Accepted: 04/16/2010] [Indexed: 01/07/2023] Open
Abstract
Group A rotaviruses (RV), members of the Reoviridae family, are a major cause of infantile acute gastroenteritis. The RV genome consists of 11 double-stranded RNA segments. In some cases, an RNA segment is replaced by a rearranged RNA segment, which is derived from its standard counterpart by partial sequence duplication. We report here a reverse genetics system for RV based on the preferential packaging of rearranged RNA segments. Using this system, wild-type or in vitro-engineered forms of rearranged segment 7 from a human rotavirus (encoding the NSP3 protein), derived from cloned cDNAs and transcribed in the cytoplasm of COS-7 cells with the help of T7 RNA polymerase, replaced the wild-type segment 7 of a bovine helper virus (strain RF). Recombinant RF viruses (i.e., engineered monoreassortant RF viruses) containing an exogenous rearranged RNA were recovered by propagating the viral progeny in MA-104 cells, with no need for additional selective pressure. Our findings offer the possibility to extend RV reverse genetics to segments encoding nonstructural or structural proteins for which no potent selective tools, such as neutralizing antibodies, are available. In addition, the system described here is the first to enable the introduction of a mutated gene expressing a modified nonstructural protein into an infectious RV. This reverse genetics system offers new perspectives for investigating RV protein functions and developing recombinant live RV vaccines containing specific changes targeted for attenuation.
Collapse
Affiliation(s)
- Cécile Troupin
- UPMC Université Paris 06, ER_7, Micro-Organismes et Physiopathologie Intestinale, 27 rue Chaligny, F-75012, Paris, France, AP-HP, Hôpital Armand Trousseau, Laboratoire de Virologie, 26 Ave. du Dr. Arnold Netter, F-75012, Paris, France, INRA, UMR_CNRS 2472-INRA 1157, Laboratoire de Virologie Moléculaire et Structurale, 1 Ave. de la Terrasse, F-91198 Gif sur Yvette, France
| | - Axelle Dehée
- UPMC Université Paris 06, ER_7, Micro-Organismes et Physiopathologie Intestinale, 27 rue Chaligny, F-75012, Paris, France, AP-HP, Hôpital Armand Trousseau, Laboratoire de Virologie, 26 Ave. du Dr. Arnold Netter, F-75012, Paris, France, INRA, UMR_CNRS 2472-INRA 1157, Laboratoire de Virologie Moléculaire et Structurale, 1 Ave. de la Terrasse, F-91198 Gif sur Yvette, France
| | - Aurélie Schnuriger
- UPMC Université Paris 06, ER_7, Micro-Organismes et Physiopathologie Intestinale, 27 rue Chaligny, F-75012, Paris, France, AP-HP, Hôpital Armand Trousseau, Laboratoire de Virologie, 26 Ave. du Dr. Arnold Netter, F-75012, Paris, France, INRA, UMR_CNRS 2472-INRA 1157, Laboratoire de Virologie Moléculaire et Structurale, 1 Ave. de la Terrasse, F-91198 Gif sur Yvette, France
| | - Patrice Vende
- UPMC Université Paris 06, ER_7, Micro-Organismes et Physiopathologie Intestinale, 27 rue Chaligny, F-75012, Paris, France, AP-HP, Hôpital Armand Trousseau, Laboratoire de Virologie, 26 Ave. du Dr. Arnold Netter, F-75012, Paris, France, INRA, UMR_CNRS 2472-INRA 1157, Laboratoire de Virologie Moléculaire et Structurale, 1 Ave. de la Terrasse, F-91198 Gif sur Yvette, France
| | - Didier Poncet
- UPMC Université Paris 06, ER_7, Micro-Organismes et Physiopathologie Intestinale, 27 rue Chaligny, F-75012, Paris, France, AP-HP, Hôpital Armand Trousseau, Laboratoire de Virologie, 26 Ave. du Dr. Arnold Netter, F-75012, Paris, France, INRA, UMR_CNRS 2472-INRA 1157, Laboratoire de Virologie Moléculaire et Structurale, 1 Ave. de la Terrasse, F-91198 Gif sur Yvette, France
| | - Antoine Garbarg-Chenon
- UPMC Université Paris 06, ER_7, Micro-Organismes et Physiopathologie Intestinale, 27 rue Chaligny, F-75012, Paris, France, AP-HP, Hôpital Armand Trousseau, Laboratoire de Virologie, 26 Ave. du Dr. Arnold Netter, F-75012, Paris, France, INRA, UMR_CNRS 2472-INRA 1157, Laboratoire de Virologie Moléculaire et Structurale, 1 Ave. de la Terrasse, F-91198 Gif sur Yvette, France
| |
Collapse
|
10
|
Eusebio-Cope A, Sun L, Hillman BI, Suzuki N. Mycoreovirus 1 S4-coded protein is dispensable for viral replication but necessary for efficient vertical transmission and normal symptom induction. Virology 2010; 397:399-408. [DOI: 10.1016/j.virol.2009.11.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Revised: 11/11/2009] [Accepted: 11/22/2009] [Indexed: 02/04/2023]
|
11
|
Pu J, Liu X, Guo Y, Cao Y, Zhao J, Zhang G. Seroprevalence of avian reovirus in egg-laying chicken flocks in China. Avian Dis 2009; 52:675-9. [PMID: 19166062 DOI: 10.1637/8300-040108-reg.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In the present study, the epidemiologic status of avian reovirus (ARV) infections was investigated from egg-laying chicken flocks in China with an enzyme-linked immunosorbent assay (ELISA) kit. Because the chickens were not vaccinated against ARV, antibodies were attributed to the infection. Antibodies specific to ARV were found in more than 92% (542/587) of the average positivity and ranged from 30% to 100% in different chicken population. A virus, designated HB06, was isolated from flocks with suspicious ARV infections. Sequence analysis of the S1 gene revealed that strain HB06 was closely related with the most ARVs with less than 2% nucleotide divergence, and the homology was highest with the vaccine strain S1133, with a 98.97% nucleotide identity. The potential significance of vaccination against ARV in egg-laying chicken flocks in China is also discussed.
Collapse
Affiliation(s)
- Juan Pu
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing 100193, P.R. China
| | | | | | | | | | | |
Collapse
|
12
|
Ben Abdeljelil N, Delmas B, Mardassi H. Replication and packaging of an infectious bursal disease virus segment A-derived minigenome. Virus Res 2008; 136:146-51. [PMID: 18562033 DOI: 10.1016/j.virusres.2008.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2008] [Revised: 04/29/2008] [Accepted: 05/03/2008] [Indexed: 10/22/2022]
Abstract
A synthetic cytomegalovirus (CMV) promoter-driven cDNA minigenome containing the enhanced green fluorescence protein (EGFP) gene as a reporter was derived from the genomic segment A of infectious bursal disease virus (IBDV). The 5'-end of the minigenome was fused to the transcription start site of the immediate early CMV promoter, and the hepatitis delta virus (HDV) ribozyme sequence was added at its 3'-end. We show that co-transfection of the minigenome with a plasmid encoding the IBDV RNA-dependent RNA polymerase VP1, results in a consistent increase of the EGFP expression, as measured by fluorescence microscopy and flow cytometry assays. Replication of the minigenome-derived transcript was evidenced by real-time RT-PCR analyses targeted to both the plus- and minus-sense strands. When cells were infected with IBDV and transfected with the plasmid carrying the minigenome, the minigenome was packaged and EGFP was found to be expressed in a second cycle of infection. These results show the potential use of this system as a new tool to characterize IBDV replication and genome packaging.
Collapse
Affiliation(s)
- N Ben Abdeljelil
- Unit of Typing and Genetics of Mycobacteria, Institut Pasteur de Tunis, 13, Place Pasteur, B.P. 74, 1002 Tunis-Belvédère, Tunisie
| | | | | |
Collapse
|
13
|
Tran AT, Xu W, Racine T, Silaghi DA, Coombs KM. Assignment of avian reovirus temperature-sensitive mutant recombination groups E, F, and G to genome segments. Virology 2008; 375:504-13. [PMID: 18353422 DOI: 10.1016/j.virol.2008.02.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2007] [Revised: 12/13/2007] [Accepted: 02/06/2008] [Indexed: 11/28/2022]
Abstract
Avian reoviruses (ARV) are less well understood than their mammalian counterparts. ARV are ubiquitous in commercial poultry and frequently isolated from acutely infected chickens. We previously described isolation of ARV temperature-sensitive (ts) mutants after nitrosoguanidine mutagenesis of wild-type ARV138, their assignment to 7 recombination groups (A-G), and genetic mapping of mutants in groups A-D to specific gene segments. For this study, wild-type serotype ARV176 was crossed with ts mutants tsE158 (Group E), tsF206 (Group F), or tsG247 (Group G) and reassortant progenies analyzed. Reassortant temperature-sensitivities were determined by efficiency of plating at permissive and non-permissive temperatures. Mapping results indicated tsE158, tsF206, and tsG247 mapped to the L1, S4, and L3 genes, respectively, which encode the lambdaA core shell, sigmaNS non-structural, and lambdaC core spike proteins, respectively. Specific amino acid substitutions in each mutant were determined and locations of structural protein alterations were placed within the 3-dimensional structure of homologous mammalian reovirus proteins. Mapping recombination groups E-G marks completion of gene assignments for all seven ts mutant groups previously generated.
Collapse
Affiliation(s)
- Anh T Tran
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada.
| | | | | | | | | |
Collapse
|
14
|
Mohd Jaafar F, Goodwin AE, Belhouchet M, Merry G, Fang Q, Cantaloube JF, Biagini P, de Micco P, Mertens PPC, Attoui H. Complete characterisation of the American grass carp reovirus genome (genus Aquareovirus: family Reoviridae) reveals an evolutionary link between aquareoviruses and coltiviruses. Virology 2008; 373:310-21. [PMID: 18191982 DOI: 10.1016/j.virol.2007.12.006] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2007] [Revised: 11/27/2007] [Accepted: 12/06/2007] [Indexed: 11/18/2022]
Abstract
An aquareovirus was isolated from several fish species in the USA (including healthy golden shiners) that is not closely related to members of species Aquareovirus A, B and C. The virus, which is atypical (does not cause syncytia in cell cultures at neutral pH), was implicated in a winter die-off of grass carp fingerlings and has therefore been called 'American grass carp reovirus' (AGCRV). Complete nucleotide sequence analysis of the AGCRV genome and comparisons to the other aquareoviruses showed that it is closely related to golden ide reovirus (GIRV) (>92% amino acid [aa] identity in VP5(NTPase) and VP2(Pol)). However, comparisons with grass carp reovirus (Aquareovirus C) and chum salmon reovirus (Aquareovirus A) showed only 22% to 76% aa identity in different viral proteins. These findings have formed the basis for the recognition of AGCRV and GIRV as members of a new Aquareovirus species 'Aquareovirus G' by ICTV. Further sequence comparisons to other members of the family Reoviridae suggest that there has been an 'evolutionary jump,' involving a change in the number of genome segments, between the aquareoviruses (11 segments) and coltiviruses (12 segments). Segment 7 of AGRCV encodes two proteins, from two distinct ORFs, which are homologues of two Coltivirus proteins encoded by genome segments 9 and 12. A similar model has previously been reported for the rotaviruses and seadornaviruses.
Collapse
Affiliation(s)
- Fauziah Mohd Jaafar
- Department of Arbovirology, Institute for Animal Health, Pirbright, Woking, Surrey, GU24 0NF, UK
| | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Kanematsu S, Arakawa M, Oikawa Y, Onoue M, Osaki H, Nakamura H, Ikeda K, Kuga-Uetake Y, Nitta H, Sasaki A, Suzaki K, Yoshida K, Matsumoto N. A Reovirus Causes Hypovirulence of Rosellinia necatrix. PHYTOPATHOLOGY 2004; 94:561-8. [PMID: 18943480 DOI: 10.1094/phyto.2004.94.6.561] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
ABSTRACT White root rot, caused by Rosellinia necatrix, is a serious soilborne disease of fruit trees and other woody plants. R. necatrix isolate W370 contains 12 segments of double-stranded RNA (dsRNA) that is believed to represent a possible member of the family Reoviridae. W370 was weakly virulent and its hyphal-tip strains became dsRNA free and strongly virulent. The 12 segments of W370dsRNA were transmitted to hygromycin B-resistant strain RT37-1, derived from a dsRNA-free strain of W370 in all or none fashion through hyphal contact with W370. The W370dsRNA-transmitted strains were less virulent than their parent strain RT37-1 on apple seedlings, with mortality ranging between 0 to 16.7% in apple seedlings that were inoculated with the W370dsRNA-containing strains and 50 to 100% for seedlings inoculated with the dsRNA-free strains. Some W370dsRNA-containing strains killed greater than 16.7% of seedlings, but these were found to have lost the dsRNA in planta. These results indicate that W370dsRNA is a hypovirulence factor in R. necatrix. In addition, a strain lost one segment (S8) of W370dsRNA during subculture, and the S8-deficient mutant strain also exhibits hypovirulence in R. necatrix.
Collapse
|