1
|
Grech-Angelini S, Lancelot R, Ferraris O, Peyrefitte CN, Vachiery N, Pédarrieu A, Peyraud A, Rodrigues V, Bastron D, Libeau G, Fernandez B, Holzmuller P, Servan de Almeida R, Michaud V, Tordo N, Comtet L, Métras R, Casabianca F, Vial L. Crimean-Congo Hemorrhagic Fever Virus Antibodies among Livestock on Corsica, France, 2014-2016. Emerg Infect Dis 2021; 26:1041-1044. [PMID: 32310061 DOI: 10.3201/10.3201/eid2605.191465] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
We conducted a serologic survey for Crimean-Congo hemorrhagic fever virus antibodies in livestock (cattle, sheep, and goats; N = 3,890) on Corsica (island of France) during 2014-2016. Overall, 9.1% of animals were seropositive, suggesting this virus circulates on Corsica. However, virus identification is needed to confirm these results.
Collapse
|
2
|
Comerlato J, Albina E, Puech C, Franco AC, Minet C, Eloiflin RJ, Rodrigues V, Servan de Almeida R. Identification of a murine cell line that distinguishes virulent from attenuated isolates of the morbillivirus Peste des Petits Ruminants, a promising tool for virulence studies. Virus Res 2020; 286:198035. [PMID: 32461190 DOI: 10.1016/j.virusres.2020.198035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 05/20/2020] [Accepted: 05/20/2020] [Indexed: 11/18/2022]
Abstract
Comprehensive pathogenesis studies on Peste des Petits Ruminants virus (PPRV) have been delayed so far by the absence of a small animal model reproducing the disease or an in vitro biological system revealing virulence differences. In this study, a mouse 10T1/2 cell line has been identified as presenting different susceptibility to virulent and attenuated PPRV strains. As evidenced by immunofluorescence test and RT-PCR, both virulent and attenuated PPR viruses penetrated and initiated the replication cycle in 10T1/2 cells, independently of the presence of the SLAM goat receptor. However, only virulent strains successfully completed their replication cycle while the vaccine strains did not. Since 10T1/2 cells are interferon-producing cells, the role of the type I interferon (type I IFN) response on this differentiated replication between virulent and attenuated strains was verified by stimulation or repression. Modulation of the type I IFN response did not improve the replication of the vaccine strains, indicating that other cell factor(s) not yet established may hinder the replication of attenuated PPRV in 10T1/2. This 10T1/2 cell line can be proposed as a new in vitro tool for PPRV-host interaction and virulence studies.
Collapse
Affiliation(s)
- Juliana Comerlato
- CIRAD, UMR ASTRE, F-34398, Montpellier, France; Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, ICBS UFRGS. Rua Sarmento Leite, 500, Porto Alegre. CEP 90050-170, RS, Brazil
| | - Emmanuel Albina
- CIRAD, UMR ASTRE, F-97170, Petit-Bourg, Guadeloupe, France; ASTRE, CIRAD, INRA, Univ Montpellier, Montpellier, France
| | - Carinne Puech
- INRA, UMR ASTRE, F-34398 Montpellier, France; ASTRE, CIRAD, INRA, Univ Montpellier, Montpellier, France
| | - Ana C Franco
- Laboratório de Virologia, Departamento de Microbiologia, Imunologia e Parasitologia, ICBS UFRGS. Rua Sarmento Leite, 500, Porto Alegre. CEP 90050-170, RS, Brazil
| | - Cécile Minet
- CIRAD, UMR ASTRE, F-34398, Montpellier, France; INTERTRYP, Univ Montpellier, CIRAD, IRD, Montpellier, France
| | | | - Valérie Rodrigues
- CIRAD, UMR ASTRE, F-34398, Montpellier, France; ASTRE, CIRAD, INRA, Univ Montpellier, Montpellier, France
| | - Renata Servan de Almeida
- CIRAD, UMR ASTRE, F-34398, Montpellier, France; ASTRE, CIRAD, INRA, Univ Montpellier, Montpellier, France.
| |
Collapse
|
3
|
Grech-Angelini S, Lancelot R, Ferraris O, Peyrefitte CN, Vachiery N, Pédarrieu A, Peyraud A, Rodrigues V, Bastron D, Libeau G, Fernandez B, Holzmuller P, Servan de Almeida R, Michaud V, Tordo N, Comtet L, Métras R, Casabianca F, Vial L. Crimean-Congo Hemorrhagic Fever Virus Antibodies among Livestock on Corsica, France, 2014-2016. Emerg Infect Dis 2020; 26. [PMID: 32310061 PMCID: PMC7181912 DOI: 10.3201/eid2605.191465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
We conducted a serologic survey for Crimean-Congo hemorrhagic fever virus antibodies in livestock (cattle, sheep, and goats; N = 3,890) on Corsica (island of France) during 2014-2016. Overall, 9.1% of animals were seropositive, suggesting this virus circulates on Corsica. However, virus identification is needed to confirm these results.
Collapse
|
4
|
Eloiflin RJ, Boyer M, Kwiatek O, Guendouz S, Loire E, Servan de Almeida R, Libeau G, Bataille A. Evolution of Attenuation and Risk of Reversal in Peste des Petits Ruminants Vaccine Strain Nigeria 75/1. Viruses 2019; 11:E724. [PMID: 31394790 PMCID: PMC6724400 DOI: 10.3390/v11080724] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 08/03/2019] [Accepted: 08/03/2019] [Indexed: 12/11/2022] Open
Abstract
Peste des Petits Ruminants (PPR) is a highly infectious disease caused by a virus of the Morbillivirus genus. The current PPR eradication effort relies mainly on the implementation of massive vaccination campaigns. One of the most widely used PPR vaccines is the Nigeria 75/1 strain obtained after attenuation by 75 serial passages of the wild type isolate in cell cultures. Here we use high throughput deep sequencing of the historical passages that led to the Nigeria 75/1 attenuated strain to understand the evolution of PPRV attenuation and to assess the risk of reversal in different cell types. Comparison of the consensus sequences of the wild type and vaccine strains showed that only 18 fixed mutations separate the two strains. At the earliest attenuation passage at our disposal (passage 47), 12 out of the 18 mutations were already present at a frequency of 100%. Low-frequency variants were identified along the genome in all passages. Sequencing of passages after the vaccine strain showed evidence of genetic drift during cell passages, especially in cells expressing the SLAM receptor targeted by PPRV. However, 15 out of the 18 mutations related to attenuation remained fixed in the population. In vitro experiments suggest that one mutation in the leader region of the PPRV genome affects virus replication. Our results suggest that only a few mutations can have a serious impact on the pathogenicity of PPRV. Risk of reversion to virulence of the attenuated PPRV strain Nigeria 75/1 during serial passages in cell cultures seems low but limiting the number of passages during vaccine production is recommended.
Collapse
Affiliation(s)
- Roger-Junior Eloiflin
- CIRAD, UMR ASTRE, F-34398 Montpellier, France
- ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Marie Boyer
- ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Olivier Kwiatek
- CIRAD, UMR ASTRE, F-34398 Montpellier, France
- ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Samia Guendouz
- CIRAD, UMR ASTRE, F-34398 Montpellier, France
- ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Etienne Loire
- CIRAD, UMR ASTRE, F-34398 Montpellier, France
- ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Renata Servan de Almeida
- CIRAD, UMR ASTRE, F-34398 Montpellier, France
- ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Geneviève Libeau
- CIRAD, UMR ASTRE, F-34398 Montpellier, France
- ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Arnaud Bataille
- CIRAD, UMR ASTRE, F-34398 Montpellier, France.
- ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France.
| |
Collapse
|
5
|
Dimitrov KM, Abolnik C, Afonso CL, Albina E, Bahl J, Berg M, Briand FX, Brown IH, Choi KS, Chvala I, Diel DG, Durr PA, Ferreira HL, Fusaro A, Gil P, Goujgoulova GV, Grund C, Hicks JT, Joannis TM, Torchetti MK, Kolosov S, Lambrecht B, Lewis NS, Liu H, Liu H, McCullough S, Miller PJ, Monne I, Muller CP, Munir M, Reischak D, Sabra M, Samal SK, Servan de Almeida R, Shittu I, Snoeck CJ, Suarez DL, Van Borm S, Wang Z, Wong FYK. Updated unified phylogenetic classification system and revised nomenclature for Newcastle disease virus. Infect Genet Evol 2019; 74:103917. [PMID: 31200111 PMCID: PMC6876278 DOI: 10.1016/j.meegid.2019.103917] [Citation(s) in RCA: 204] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/07/2019] [Accepted: 06/10/2019] [Indexed: 02/07/2023]
Abstract
Several Avian paramyxoviruses 1 (synonymous with Newcastle disease virus or NDV, used hereafter) classification systems have been proposed for strain identification and differentiation. These systems pioneered classification efforts; however, they were based on different approaches and lacked objective criteria for the differentiation of isolates. These differences have created discrepancies among systems, rendering discussions and comparisons across studies difficult. Although a system that used objective classification criteria was proposed by Diel and co-workers in 2012, the ample worldwide circulation and constant evolution of NDV, and utilization of only some of the criteria, led to identical naming and/or incorrect assigning of new sub/genotypes. To address these issues, an international consortium of experts was convened to undertake in-depth analyses of NDV genetic diversity. This consortium generated curated, up-to-date, complete fusion gene class I and class II datasets of all known NDV for public use, performed comprehensive phylogenetic neighbor-Joining, maximum-likelihood, Bayesian and nucleotide distance analyses, and compared these inference methods. An updated NDV classification and nomenclature system that incorporates phylogenetic topology, genetic distances, branch support, and epidemiological independence was developed. This new consensus system maintains two NDV classes and existing genotypes, identifies three new class II genotypes, and reduces the number of sub-genotypes. In order to track the ancestry of viruses, a dichotomous naming system for designating sub-genotypes was introduced. In addition, a pilot dataset and sub-trees rooting guidelines for rapid preliminary genotype identification of new isolates are provided. Guidelines for sequence dataset curation and phylogenetic inference, and a detailed comparison between the updated and previous systems are included. To increase the speed of phylogenetic inference and ensure consistency between laboratories, detailed guidelines for the use of a supercomputer are also provided. The proposed unified classification system will facilitate future studies of NDV evolution and epidemiology, and comparison of results obtained across the world.
Collapse
Affiliation(s)
- Kiril M Dimitrov
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA.
| | - Celia Abolnik
- Department of Production Studies, Faculty of Veterinary Science, University of Pretoria, Old Soutpan Road, Onderstepoort, Pretoria 0110, South Africa
| | - Claudio L Afonso
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA.
| | - Emmanuel Albina
- CIRAD, UMR ASTRE, F-97170 Petit-Bourg, Guadeloupe, France; ASTRE CIRAD, INRA, Université de Montpellier, Montpellier, France
| | - Justin Bahl
- Center for Ecology of Infectious Disease, Department of Infectious Diseases, Department of Epidemiology and Biostatistics, Institute of Bioinformatics, University of Georgia, Athens, GA 30602, USA
| | - Mikael Berg
- Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Box 7028, 750 07 Uppsala, Sweden
| | - Francois-Xavier Briand
- ANSES, Avian and Rabbit Virology Immunology and Parasitology Unit, National reference laboratory for avian Influenza and Newcastle disease, BP 53, 22440 Ploufragan, France
| | - Ian H Brown
- OIE/FAO International Reference Laboratory for Newcastle Disease, Animal and Plant Health Agency (APHA -Weybridge), Addlestone KT15 3NB, UK
| | - Kang-Seuk Choi
- Animal and Plant Quarantine Agency, Ministry of Agriculture, Food and Rural Affairs (MAFRA), 177 Hyeoksin 8-ro, Gimcheon-si, Gyeongsangbuk-do 39660, Republic of Korea
| | - Ilya Chvala
- Federal Governmental Budgetary Institution, Federal Centre for Animal Health, FGI ARRIAH, Vladimir 600901, Russia
| | - Diego G Diel
- Department of Veterinary and Biomedical Sciences, Animal Disease, Research and Diagnostic Laboratory, South Dakota State University, Brookings, SD, USA
| | - Peter A Durr
- CSIRO Australian Animal Health Laboratory, Portarlington Road, East Geelong, Victoria 3219, Australia
| | - Helena L Ferreira
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA; University of Sao Paulo, ZMV, FZEA, Pirassununga 13635900, Brazil
| | - Alice Fusaro
- Istituto Zooprofilattico Sperimentale delle Venezie (IZSVe), Viale dell'Università 10, Legnaro 35020, Italy
| | - Patricia Gil
- ASTRE CIRAD, INRA, Université de Montpellier, Montpellier, France; CIRAD, UMR ASTRE, F-34398 Montpellier, France
| | - Gabriela V Goujgoulova
- National Diagnostic and Research Veterinary Medical Institute, 15 Pencho Slaveikov blvd., Sofia 1606, Bulgaria
| | - Christian Grund
- Friedrich-Loeffler-Institut, 17493 Greifswald, Insel Riems, Germany
| | - Joseph T Hicks
- Center for Ecology of Infectious Disease, Department of Infectious Diseases, Department of Epidemiology and Biostatistics, Institute of Bioinformatics, University of Georgia, Athens, GA 30602, USA
| | - Tony M Joannis
- Regional Laboratory for Animal Influenzas and Transboundary Animal Diseases, National Veterinary Research Institute, Vom, Nigeria
| | - Mia Kim Torchetti
- National Veterinary Services Laboratories, Diagnostics and Biologics, Veterinary Services, Animal and Plant Health Inspection Service, U.S. Department of Agriculture, 1920 Dayton Ave, Ames, IA 50010, USA
| | - Sergey Kolosov
- Federal Governmental Budgetary Institution, Federal Centre for Animal Health, FGI ARRIAH, Vladimir 600901, Russia
| | - Bénédicte Lambrecht
- Infectious Diseases in Animals, SCIENSANO, Groeselenberg 99, 1180, Ukkel, Brussels, Belgium
| | - Nicola S Lewis
- OIE/FAO International Reference Laboratory for Newcastle Disease, Animal and Plant Health Agency (APHA -Weybridge), Addlestone KT15 3NB, UK; Royal Veterinary College, University of London, 4 Royal College Street, London NW1 0TU, UK
| | - Haijin Liu
- College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi 712100, PR China
| | - Hualei Liu
- China Animal Health and Epidemiology Center (CAHEC), 369 Nanjing Road, Qingdao 266032, China
| | - Sam McCullough
- CSIRO Australian Animal Health Laboratory, Portarlington Road, East Geelong, Victoria 3219, Australia
| | - Patti J Miller
- Department of Population Health, College of Veterinary Medicine, University of Georgia, 953 College Station Road, Athens, GA 30602, USA
| | - Isabella Monne
- Istituto Zooprofilattico Sperimentale delle Venezie (IZSVe), Viale dell'Università 10, Legnaro 35020, Italy
| | - Claude P Muller
- Infectious Diseases Research Unit, Department of Infection and Immunity, Luxembourg Institute of Health, 29, rue Henri Koch, L-4354 Esch-sur-Alzette, Luxembourg
| | - Muhammad Munir
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster, United Kingdom
| | - Dilmara Reischak
- Ministério da Agricultura, Pecuária e Abastecimento, Laboratório Federal de Defesa Agropecuário, Campinas, SP 13100-105, Brazil
| | - Mahmoud Sabra
- Department of Poultry Diseases, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt
| | - Siba K Samal
- Virginia-Maryland Regional College of Veterinary Medicine, University of Maryland, College Park, MD, USA
| | - Renata Servan de Almeida
- ASTRE CIRAD, INRA, Université de Montpellier, Montpellier, France; CIRAD, UMR ASTRE, F-34398 Montpellier, France
| | - Ismaila Shittu
- Regional Laboratory for Animal Influenzas and Transboundary Animal Diseases, National Veterinary Research Institute, Vom, Nigeria
| | - Chantal J Snoeck
- Infectious Diseases Research Unit, Department of Infection and Immunity, Luxembourg Institute of Health, 29, rue Henri Koch, L-4354 Esch-sur-Alzette, Luxembourg
| | - David L Suarez
- Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, US National Poultry Research Center, ARS, USDA, 934 College Station Road, Athens, GA 30605, USA
| | - Steven Van Borm
- Infectious Diseases in Animals, SCIENSANO, Groeselenberg 99, 1180, Ukkel, Brussels, Belgium
| | - Zhiliang Wang
- China Animal Health and Epidemiology Center (CAHEC), 369 Nanjing Road, Qingdao 266032, China
| | - Frank Y K Wong
- CSIRO Australian Animal Health Laboratory, Portarlington Road, East Geelong, Victoria 3219, Australia
| |
Collapse
|
6
|
Liu H, de Almeida RS, Gil P, Majó N, Nofrarías M, Briand FX, Jestin V, Albina E. Can genotype mismatch really affect the level of protection conferred by Newcastle disease vaccines against heterologous virulent strains? Vaccine 2018; 36:3917-3925. [PMID: 29843999 DOI: 10.1016/j.vaccine.2018.05.074] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 05/10/2018] [Accepted: 05/17/2018] [Indexed: 10/24/2022]
Abstract
Newcastle disease (ND), caused by virulent class II avian paramyxovirus 1 (Newcastle disease virus, NDV), occurs sporadically in poultry despite their having been immunized with commercial vaccines. These vaccines were all derived from NDV strains isolated around 70 years ago. Since then, class II NDV strains have evolved into 18 genotypes. Whether the vaccination failure results from genotype mismatches between the currently used vaccine strains and field-circulating velogenic strains or from an impaired immune response in the vaccination remains unclear. To test the first hypothesis, we performed a heterologous genotype II vaccine/genotype XI challenge in one-day old specific pathogen free (SPF) chicks and reproduced viral shedding. We then produced two attenuated strains of genotype II and XI by reverse genetics and used them to immunize two-week old SPF chickens that were subsequently challenged with velogenic strains of genotypes II, VII and XI. We found that both vaccines could induce antibodies with hemagglutination inhibition titers higher than 6.5 log2. Vaccination also completely prevented disease, viral shedding in swabs, and blocked viral replication in tissues from different genotypes in contrast to unvaccinated chickens that died shortly after challenge. Taken together, our results support the hypothesis that, in immunocompetent poultry, genotype mismatch is not the main reason for vaccination failure.
Collapse
Affiliation(s)
- Haijin Liu
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France; Department of Avian Disease, College of Veterinary Medicine, Northwest A & F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Renata Servan de Almeida
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Patricia Gil
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Natàlia Majó
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus UAB, 08193 Bellaterra, Spain; Departament de Sanitat i Anatomia Animals, Facultat de Veterinària, UAB, 08193 Bellaterra, Spain
| | - Miquel Nofrarías
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus UAB, 08193 Bellaterra, Spain
| | | | | | - Emmanuel Albina
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; CIRAD, UMR ASTRE, F-97170 Petit-Bourg, Guadeloupe, France.
| |
Collapse
|
7
|
Abstract
Newcastle disease, caused by infection with virulent strains of Newcastle disease virus (NDV), poses a risk for the poultry industry. The virulence of NDV is mainly determined by the cleavage site of F protein. Lentogenic NDV can become velogenic after passages in SPF chicken brain and air sac based on some strains isolated from water birds, because the proportion of virulent-related strains gradually increases. In contrast, this proportion remains unchanged if NDV is passaged via 10-day-old SPF chicken embryos. This information suggests that environmental conditions rather than mutation affect NDV fitness in quasispecies. However, it is unknown how the environment selects virulent-related strains from a viral population. In this study, velogenic and lentogenic NDV marked by green or red fluorescence were used to establish persistent infection (PI) in BHK-21 cells. Monitoring viruses by different methods, we found that, without competition, persistently infected cells harbored lentogenic and velogenic NDV strains similarly in terms of viral release, viral spread and the period of persistent viral infection. In contrast, under competitive co-infection, velogenic NDV became dominant in quasispecies from the fifth passage of PI cells, which resulted in the progressive disappearance of the lentogenic NDV strain. This domination was concomitant with a short-term reduction in the superinfection exclusion and supernatant interference in PI cells resulting in a velogenic virus rebound. We concluded that virulent-related F protein cleavage site facilitates the spread and replication of NDV in conditions under which cells do not secret trypsin-like proteases and do not inhibit free virus infection, resulting in a gradual increase in virulent strains in quasispecies with the number of passages.
Collapse
Affiliation(s)
- Haijin Liu
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Renata Servan de Almeida
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Patricia Gil
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Emmanuel Albina
- CIRAD, UMR ASTRE, F-97170 Petit-Bourg, Guadeloupe, France; ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France.
| |
Collapse
|
8
|
Liu H, de Almeida RS, Gil P, Albina E. Comparison of the efficiency of different newcastle disease virus reverse genetics systems. J Virol Methods 2017; 249:111-116. [PMID: 28867302 DOI: 10.1016/j.jviromet.2017.08.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 08/29/2017] [Accepted: 08/30/2017] [Indexed: 01/26/2023]
Abstract
Rescue of negative-sense single-stranded RNA viruses ((-)ssRNA virus), generally requires the handling of a large number of plasmids to provide the virus genome and essential components for gene expression and genome replication. This constraint probably renders reverse genetics of (-)ssRNA virus more complex and less efficient. Some authors have shown that the fewer the plasmids, the more efficient reverse genetics is for segmented RNA virus. However, it is not clear if the same applies for (-)ssRNA, such as Newcastle disease virus (NDV). To address this issue, six variants of NDV reverse genetic systems were established by cloning combinations of NP, P and L genes, mini-genome or full-genome in 4, 3, 2 and 1 plasmid. In terms of mini-genome and full-genome rescue, we showed that only the 2-plasmid system, assembling three support plasmids together, was able to improve the rescue efficiency over that of the conventional 4-plasmid system. These results may help establish and/or improve reverse genetics for other mononegaviruses.
Collapse
Affiliation(s)
- Haijin Liu
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; INRA, UMR1309 ASTRE, F-34398 Montpellier, France
| | | | - Patricia Gil
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; INRA, UMR1309 ASTRE, F-34398 Montpellier, France
| | - Emmanuel Albina
- CIRAD, UMR ASTRE, F-97170 Petit-Bourg, Guadeloupe, France; INRA, UMR1309 ASTRE, F-34398 Montpellier, France.
| |
Collapse
|
9
|
Liu H, Albina E, Gil P, Minet C, de Almeida RS. Two-plasmid system to increase the rescue efficiency of paramyxoviruses by reverse genetics: The example of rescuing Newcastle Disease Virus. Virology 2017; 509:42-51. [PMID: 28595094 DOI: 10.1016/j.virol.2017.06.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 05/28/2017] [Accepted: 06/01/2017] [Indexed: 10/19/2022]
Abstract
Within paramyxoviruses, conventional reverse genetics require the transfection of a minimum of four plasmids: three to reconstruct the viral polymerase complex that replicates and expresses the virus genome delivered by a fourth plasmid. The successful transfection of four or more plasmids of different sizes into one cell and the subsequent generation of at least one viable and replicable viral particle is a rare event, which explains the low rescue efficiency, especially of low virulent viruses with reduced replication efficiency in cell lines. In this study, we report on an improved reverse genetics system developed for an avian paramyxovirus, Newcastle Disease Virus (NDV), in which the number of plasmids was reduced from four to two. Compared to the conventional method, the 2-plasmid system enables earlier and increased production of rescued viruses and, in addition, makes it possible to rescue viruses that it was not possible to rescue using the 4-plasmid system.
Collapse
Affiliation(s)
- Haijin Liu
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; INRA, UMR1309 ASTRE, F-34398 Montpellier, France
| | - Emmanuel Albina
- CIRAD, UMR ASTRE, F-97170 Petit-Bourg, Guadeloupe, France; INRA, UMR1309 ASTRE, F-34398 Montpellier, France.
| | - Patricia Gil
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; INRA, UMR1309 ASTRE, F-34398 Montpellier, France
| | - Cécile Minet
- CIRAD, UMR ASTRE, F-34398 Montpellier, France; INRA, UMR1309 ASTRE, F-34398 Montpellier, France; CIRAD, UMR INTERTRYP, F-34398 Montpellier, France
| | | |
Collapse
|
10
|
Ahmed Nizamani Z, Holz C, Keita D, Libeau G, Albina E, Almeida RSD. RNA INTERFERENCE AS ANTIVIRAL THERAPY: DREAM OR REALITY? VR&R 2013. [DOI: 10.17525/vrr.v18i1-2.92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
|
11
|
de Almeida RS, Hammoumi S, Gil P, Briand FX, Molia S, Gaidet N, Cappelle J, Chevalier V, Balança G, Traoré A, Grillet C, Maminiaina OF, Guendouz S, Dakouo M, Samaké K, Bezeid OEM, Diarra A, Chaka H, Goutard F, Thompson P, Martinez D, Jestin V, Albina E. New avian paramyxoviruses type I strains identified in Africa provide new outcomes for phylogeny reconstruction and genotype classification. PLoS One 2013; 8:e76413. [PMID: 24204623 PMCID: PMC3799739 DOI: 10.1371/journal.pone.0076413] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Accepted: 08/28/2013] [Indexed: 11/18/2022] Open
Abstract
Newcastle disease (ND) is one of the most lethal diseases of poultry worldwide. It is caused by an avian paramyxovirus 1 that has high genomic diversity. In the framework of an international surveillance program launched in 2007, several thousand samples from domestic and wild birds in Africa were collected and analyzed. ND viruses (NDV) were detected and isolated in apparently healthy fowls and wild birds. However, two thirds of the isolates collected in this study were classified as virulent strains of NDV based on the molecular analysis of the fusion protein and experimental in vivo challenges with two representative isolates. Phylogenetic analysis based on the F and HN genes showed that isolates recovered from poultry in Mali and Ethiopia form new groups, herein proposed as genotypes XIV and sub-genotype VIf with reference to the new nomenclature described by Diel's group. In Madagascar, the circulation of NDV strains of genotype XI, originally reported elsewhere, is also confirmed. Full genome sequencing of five African isolates was generated and an extensive phylogeny reconstruction was carried out based on the nucleotide sequences. The evolutionary distances between groups and the specific amino acid signatures of each cluster allowed us to refine the genotype nomenclature.
Collapse
|
12
|
Albina E, Kwiatek O, Minet C, Lancelot R, Servan de Almeida R, Libeau G. Peste des Petits Ruminants, the next eradicated animal disease? Vet Microbiol 2012; 165:38-44. [PMID: 23313537 DOI: 10.1016/j.vetmic.2012.12.013] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Revised: 12/03/2012] [Accepted: 12/17/2012] [Indexed: 10/27/2022]
Abstract
Peste des Petits Ruminants (PPR) is a widespread viral disease caused by a Morbillivirus (Paramyxoviridae). There is a single serotype of PPR virus, but four distinct genetic lineages. Morbidity and mortality are high when occurring in naive sheep and goats populations. Cattle and African buffaloes (Syncerus caffer) are asymptomatically infected. Other wild ruminants and camels may express clinical signs and mortality. PPR has recently spread in southern and northern Africa, and in central and far-east Asia. More than one billion sheep and goats worldwide are at risk. PPR is also present in Europe through western Turkey. Because of its clinical incidence and the restrictions on animal movements, PPR is a disease of major economic importance. A live attenuated vaccine was developed in the 1980s, and has been widely used in sheep and goats. Current researches aim (i) to make it more thermotolerant for use in countries with limited cold chain, and (ii) to add a DIVA mark to shorten and reduce the cost of final eradication. Rinderpest virus-another Morbillivirus-was the first animal virus to be eradicated from Earth. PPRV has been proposed as the next candidate. Considering its wide distribution and its multiple target host species which have an intense mobility, it will be a long process that cannot exclusively rely on mass vaccination. PPR specific epidemiological features and socio-economic considerations will also have to be taken into account, and sustained international, coordinated, and funded strategy based on a regional approach of PPR control will be the guarantee toward success.
Collapse
|
13
|
Gaidet N, Ould El Mamy AB, Cappelle J, Caron A, Cumming GS, Grosbois V, Gil P, Hammoumi S, de Almeida RS, Fereidouni SR, Cattoli G, Abolnik C, Mundava J, Fofana B, Ndlovu M, Diawara Y, Hurtado R, Newman SH, Dodman T, Balança G. Investigating avian influenza infection hotspots in old-world shorebirds. PLoS One 2012; 7:e46049. [PMID: 23029383 PMCID: PMC3460932 DOI: 10.1371/journal.pone.0046049] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 08/27/2012] [Indexed: 11/25/2022] Open
Abstract
Heterogeneity in the transmission rates of pathogens across hosts or environments may produce disease hotspots, which are defined as specific sites, times or species associations in which the infection rate is consistently elevated. Hotspots for avian influenza virus (AIV) in wild birds are largely unstudied and poorly understood. A striking feature is the existence of a unique but consistent AIV hotspot in shorebirds (Charadriiformes) associated with a single species at a specific location and time (ruddy turnstone Arenaria interpres at Delaware Bay, USA, in May). This unique case, though a valuable reference, limits our capacity to explore and understand the general properties of AIV hotspots in shorebirds. Unfortunately, relatively few shorebirds have been sampled outside Delaware Bay and they belong to only a few shorebird families; there also has been a lack of consistent oropharyngeal sampling as a complement to cloacal sampling. In this study we looked for AIV hotspots associated with other shorebird species and/or with some of the larger congregation sites of shorebirds in the old world. We assembled and analysed a regionally extensive dataset of AIV prevalence from 69 shorebird species sampled in 25 countries across Africa and Western Eurasia. Despite this diverse and extensive coverage we did not detect any new shorebird AIV hotspots. Neither large shorebird congregation sites nor the ruddy turnstone were consistently associated with AIV hotspots. We did, however, find a low but widespread circulation of AIV in shorebirds that contrast with the absence of AIV previously reported in shorebirds in Europe. A very high AIV antibody prevalence coupled to a low infection rate was found in both first-year and adult birds of two migratory sandpiper species, suggesting the potential existence of an AIV hotspot along their migratory flyway that is yet to be discovered.
Collapse
|
14
|
Holz CL, Albina E, Minet C, Lancelot R, Kwiatek O, Libeau G, Servan de Almeida R. RNA interference against animal viruses: how morbilliviruses generate extended diversity to escape small interfering RNA control. J Virol 2012; 86:786-95. [PMID: 22072768 PMCID: PMC3255857 DOI: 10.1128/jvi.06210-11] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Accepted: 10/26/2011] [Indexed: 11/20/2022] Open
Abstract
Viruses are serious threats to human and animal health. Vaccines can prevent viral diseases, but few antiviral treatments are available to control evolving infections. Among new antiviral therapies, RNA interference (RNAi) has been the focus of intensive research. However, along with the development of efficient RNAi-based therapeutics comes the risk of emergence of resistant viruses. In this study, we challenged the in vitro propensity of a morbillivirus (peste des petits ruminants virus), a stable RNA virus, to escape the inhibition conferred by single or multiple small interfering RNAs (siRNAs) against conserved regions of the N gene. Except with the combination of three different siRNAs, the virus systematically escaped RNAi after 3 to 20 consecutive passages. The genetic modifications involved consisted of single or multiple point nucleotide mutations and a deletion of a stretch of six nucleotides, illustrating that this virus has an unusual genomic malleability.
Collapse
|
15
|
Cappelle J, Servan de Almeida R, Fofana B, Dakouo M, Balança G, Gil P, Albina E, Gaidet N. Circulation of avian influenza viruses in wild birds in Inner Niger Delta, Mali. Influenza Other Respir Viruses 2011; 6:240-4. [PMID: 22168475 PMCID: PMC5779802 DOI: 10.1111/j.1750-2659.2011.00314.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Please cite this paper as: Cappelle et al. (2012) Circulation of avian influenza viruses in wild birds in Inner Niger Delta, Mali. Influenza and Other Respiratory Viruses 6(4), 240–244. Background Avian influenza viruses (AIV) have been detected in wild birds in West Africa during the northern winter, but no information is available on a potential year‐round circulation of AIV in West Africa. Such year‐round circulation would allow reassortment opportunities between strains circulating in Afro‐tropical birds and strains imported by migratory birds wintering in West Africa. Objective and Method A 2‐year longitudinal survey was conducted in the largest continental wetland of West Africa, the Inner Niger Delta in Mali, to determine the year‐round circulation of AIV in wild birds. Results and Conclusions Avian influenza virus RNA was detected during all periods of the year. Very low prevalence was detected during the absence of the migratory wild birds. However, a year‐round circulation of AIV seems possible in West Africa, as shown in other African regions. West Africa may hence be another potential site of reassortment between AIV strains originating from both Afro‐tropical and Eurasian regions.
Collapse
|
16
|
Dundon WG, Heidari A, Fusaro A, Monne I, Beato MS, Cattoli G, Koch G, Starick E, Brown IH, Aldous EW, Briand FX, Le Gall-Reculé G, Jestin V, Jørgensen PH, Berg M, Zohari S, Metreveli G, Munir M, Ståhl K, Albina E, Hammoumi S, Gil P, de Almeida RS, Smietanka K, Domańska-Blicharz K, Minta Z, Van Borm S, van den Berg T, Martin AM, Barbieri I, Capua I. Genetic data from avian influenza and avian paramyxoviruses generated by the European network of excellence (EPIZONE) between 2006 and 2011--review and recommendations for surveillance. Vet Microbiol 2011; 154:209-21. [PMID: 21925809 DOI: 10.1016/j.vetmic.2011.08.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 08/13/2011] [Accepted: 08/17/2011] [Indexed: 01/29/2023]
Abstract
Since 2006, the members of the molecular epidemiological working group of the European "EPIZONE" network of excellence have been generating sequence data on avian influenza and avian paramyxoviruses from both European and African sources in an attempt to more fully understand the circulation and impact of these viruses. This review presents a timely update on the epidemiological situation of these viruses based on sequence data generated during the lifetime of this project in addition to data produced by other groups during the same period. Based on this information and putting it all into a European context, recommendations for continued surveillance of these important viruses within Europe are presented.
Collapse
Affiliation(s)
- William G Dundon
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Nizamani ZA, Keil GM, Albina E, Holz C, Minet C, Kwiatek O, Libeau G, Servan de Almeida R. Potential of adenovirus and baculovirus vectors for the delivery of shRNA against morbilliviruses. Antiviral Res 2011; 90:98-101. [PMID: 21356246 DOI: 10.1016/j.antiviral.2011.02.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 01/17/2011] [Accepted: 02/18/2011] [Indexed: 11/30/2022]
Abstract
Morbilliviruses are important pathogens of humans, ruminants, carnivores and marine mammals. Although good vaccines inducing long-term immunity are available, recurrent outbreaks of measles, canine distemper and peste des petits ruminants (PPR) are observed. In control strategies, antivirals thus could be useful to confine virus spread and application of interfering RNAs is a promising approach, provided they can be delivered efficiently into the host cells. We have constructed recombinant adenovirus and baculovirus vectors expressing short hairpin RNAs (shRNAs) against the PPR virus (PPRV) and compared them in vitro. It was found that both recombinant viruses inhibited PPRV replication with the baculovirus vector, which inhibited generation of infectious progeny by more than 2 log10 and the nucleoprotein expression of PPRV by 73%, being the more efficient. The results show that baculoviral shRNA-expressing vectors have the potential for therapeutic use against morbillivirus infections.
Collapse
|
18
|
Maminiaina OF, Gil P, Briand FX, Albina E, Keita D, Andriamanivo HR, Chevalier V, Lancelot R, Martinez D, Rakotondravao R, Rajaonarison JJ, Koko M, Andriantsimahavandy AA, Jestin V, Servan de Almeida R. Newcastle disease virus in Madagascar: identification of an original genotype possibly deriving from a died out ancestor of genotype IV. PLoS One 2010; 5:e13987. [PMID: 21085573 PMCID: PMC2981552 DOI: 10.1371/journal.pone.0013987] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Accepted: 10/17/2010] [Indexed: 11/25/2022] Open
Abstract
In Madagascar, Newcastle disease (ND) has become enzootic after the first documented epizootics in 1946, with recurrent annual outbreaks causing mortality up to 40%. Four ND viruses recently isolated in Madagascar were genotypically and pathotypically characterised. By phylogenetic inference based on the F and HN genes, and also full-genome sequence analyses, the NDV Malagasy isolates form a cluster distant enough to constitute a new genotype hereby proposed as genotype XI. This new genotype is presumably deriving from an ancestor close to genotype IV introduced in the island probably more than 50 years ago. Our data show also that all the previously described neutralising epitopes are conserved between Malagasy and vaccine strains. However, the potential implication in vaccination failures of specific amino acid substitutions predominantly found on surface-exposed epitopes of F and HN proteins is discussed.
Collapse
Affiliation(s)
| | - Patricia Gil
- CIRAD, BIOS Department, UMR CMAEE, Montpellier, France
| | | | | | - Djénéba Keita
- CIRAD, BIOS Department, UMR CMAEE, Montpellier, France
| | | | | | | | | | | | | | - M. Koko
- Antananarivo University Madagascar, Antananarivo, Madagascar
| | | | - Véronique Jestin
- Anses-Ploufragan Plouzané Laboratory, VIPAC Unit, Ploufragan, France
| | | |
Collapse
|
19
|
Molia S, Traoré A, Gil P, Hammoumi S, Lesceu S, Servan de Almeida R, Albina E, Chevalier V. Avian influenza in backyard poultry of the Mopti region, Mali. Trop Anim Health Prod 2009; 42:807-9. [PMID: 19911294 DOI: 10.1007/s11250-009-9497-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/29/2009] [Indexed: 10/20/2022]
Abstract
This study reports the first evidence of circulation of avian influenza viruses (AIV) in domestic poultry in Mali. In the Mopti region, where AIV have already been isolated in migratory water birds, we sampled 223 backyard domestic birds potentially in contact with wild birds and found that 3.6% had tracheal or cloacal swabs positive by real-time reverse transcription PCR (rRT-PCR) for type A influenza viruses (IVA) and that 13.7% had sera positive by commercial ELISA test detecting antibodies against IVA. None of the birds positive by rRT-PCR for IVA was positive by rRT-PCR for H5 and H7 subtypes, and none showed any clinical signs therefore indicating the circulation of low pathogenic avian influenza. Unfortunately, no virus isolation was possible. Further studies are needed to assess the temporal evolution of AIV circulation in the Mopti region and its possible correlation with the presence of wild birds.
Collapse
|
20
|
Servan de Almeida R, Maminiaina OF, Gil P, Hammoumi S, Molia S, Chevalier V, Koko M, Andriamanivo HR, Traoré A, Samaké K, Diarra A, Grillet C, Martinez D, Albina E. Africa, a reservoir of new virulent strains of Newcastle disease virus? Vaccine 2009; 27:3127-9. [PMID: 19446180 DOI: 10.1016/j.vaccine.2009.03.076] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2009] [Accepted: 03/24/2009] [Indexed: 12/29/2022]
|
21
|
Antoniassi da Silva LH, Spilki FR, Riccetto AGL, de Almeida RS, Baracat ECE, Arns CW. Genetic variability in the G protein gene of human respiratory syncytial virus isolated from the Campinas metropolitan region, Brazil. J Med Virol 2008; 80:1653-60. [DOI: 10.1002/jmv.21249] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
22
|
Keita D, Servan de Almeida R, Libeau G, Albina E. Identification and mapping of a region on the mRNA of Morbillivirus nucleoprotein susceptible to RNA interference. Antiviral Res 2008; 80:158-67. [PMID: 18634829 DOI: 10.1016/j.antiviral.2008.06.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2007] [Revised: 01/21/2008] [Accepted: 06/03/2008] [Indexed: 11/25/2022]
Abstract
The morbillivirus genus includes important pathogens such as measles virus (MV), peste des petits ruminants virus (PPRV), and rinderpest virus (RPV) and forms a group of antigenically related viruses. The viral nucleoprotein (N) is a well-conserved protein among the genus and plays a central role in the replication of the virus. Using a comprehensive approach for siRNA screening of the conserved sequences of the N gene, including sequence analysis and functional in vitro tests, we have identified a region for the design of siRNA effective for the control of PPRV, RPV, and MV replication. Silencing of the N mRNA efficiently shuts down the production of N transcripts, the expression of N protein, and the indirect inhibition of matrix protein, resulting in the inhibition of PPRV progeny by 10,000-fold. These results suggest that siRNA against this region should be further explored as a therapeutic strategy for morbillivirus infections.
Collapse
Affiliation(s)
- Djénéba Keita
- CIRAD, Département Systèmes Biologiques, UPR 15 Contrôle des Maladies Animales Emergentes et Exotiques, TA A-15/G, Campus International de Baillarguet, Montpellier Cedex 5, France
| | | | | | | |
Collapse
|
23
|
da Silva LHA, Spilki FR, Riccetto AGL, de Almeida RS, Baracat ECE, Arns CW. Variant isolates of human metapneumovirus subgroup B genotype 1 in Campinas, Brazil. J Clin Virol 2008; 42:78-81. [DOI: 10.1016/j.jcv.2007.11.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2007] [Revised: 10/11/2007] [Accepted: 11/06/2007] [Indexed: 11/26/2022]
|
24
|
de Almeida RS, Keita D, Libeau G, Albina E. Structure and sequence motifs of siRNA linked with in vitro down-regulation of morbillivirus gene expression. Antiviral Res 2008; 79:37-48. [PMID: 18394725 DOI: 10.1016/j.antiviral.2008.01.159] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2007] [Revised: 01/11/2008] [Accepted: 01/23/2008] [Indexed: 10/22/2022]
Abstract
The most challenging task in RNA interference is the design of active small interfering RNA (siRNA) sequences. Numerous strategies have been published to select siRNA. They have proved effective in some applications but have failed in many others. Nonetheless, all existing guidelines have been devised to select effective siRNAs targeting human or murine genes. They may not be appropriate to select functional sequences that target genes from other organisms like viruses. In this study, we have analyzed 62 siRNA duplexes of 19 bases targeting three genes of three morbilliviruses. In those duplexes, we have checked which features are associated with siRNA functionality. Our results suggest that the intramolecular secondary structure of the targeted mRNA contributes to siRNA efficiency. We also confirm that the presence of at least the sequence motifs U13, A or U19, as well as the absence of G13, cooperate to increase siRNA knockdown rates. Additionally, we observe that G11 is linked with siRNA efficacy. We believe that an algorithm based on these findings may help in the selection of functional siRNA sequences directed against viral genes.
Collapse
|
25
|
Abstract
Peste-des-petits-ruminants virus (PPRV) and rinderpest virus (RPV) are two morbilliviruses of economic relevance in African and Asian countries. Although efficient vaccines are available for both diseases, they cannot protect the animals before 14 days post-vaccination. In emergencies, it would be desirable to have efficient therapeutics for virus control. Here, two regions are described in the nucleocapsid genes of PPRV and RPV that can be targeted efficiently by synthetic short interfering RNAs (siRNAs), resulting in a >80 % reduction in virus replication. The effects of siRNAs on the production of viral RNA by real-time quantitative PCR, of viral proteins by flow cytometry and of virus particles by appreciation of the cytopathic effect and virus titration were monitored. The findings of this work highlight the potential for siRNA molecules to be developed as therapeutic agents for the treatment of PPRV and RPV infections.
Collapse
Affiliation(s)
- Renata Servan de Almeida
- CIRAD, Département Systèmes Biologiques, UR-15, Campus International de Baillarguet, 34398 Montpellier, France
| | - Djénéba Keita
- CIRAD, Département Systèmes Biologiques, UR-15, Campus International de Baillarguet, 34398 Montpellier, France
| | - Geneviève Libeau
- CIRAD, Département Systèmes Biologiques, UR-15, Campus International de Baillarguet, 34398 Montpellier, France
| | - Emmanuel Albina
- CIRAD, Département Systèmes Biologiques, UR-15, Campus International de Baillarguet, 34398 Montpellier, France
| |
Collapse
|
26
|
Ferreira HL, Spilki FR, de Almeida RS, Santos MMAB, Arns CW. Inhibition of avian metapneumovirus (AMPV) replication by RNA interference targeting nucleoprotein gene (N) in cultured cells. Antiviral Res 2007; 74:77-81. [PMID: 17275932 DOI: 10.1016/j.antiviral.2006.12.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2006] [Revised: 12/07/2006] [Accepted: 12/11/2006] [Indexed: 11/22/2022]
Abstract
Avian metapneumovirus (AMPV) is the primary causative agent of severe rhinotracheitis in turkeys. It is associated with swollen head syndrome in chickens and is the source of significant economic losses to animal food production. In this study, we designed specific short interfering RNA (siRNA) targeting the AMPV nucleoprotein (N) and fusion (F) genes. Three days post-virus infection, virus titration, real time RT-PCR, and RT-PCR assays were performed to verify the effect of siRNA in AMPV replication. A marked decrease in virus titers from transfected CER cells treated with siRNA/N was observed. Also, the production of N, F, and G mRNAs in AMPV was decreased. Results indicate that N-specific siRNA can inhibit virus replication. In future studies, a combination of siRNAs targeting the RNA polymerase complex may be used as a tool to study AMPV replication and/or antiviral therapy.
Collapse
Affiliation(s)
- Helena Lage Ferreira
- Laboratório de Virologia Animal, Departamento de Microbiologia e Imunologia, IB/UNICAMP, PO Box 6109, Campinas CEP: 13083970, SP, Brazil.
| | | | | | | | | |
Collapse
|
27
|
Riccetto AGL, Ribeiro JD, Silva MTND, Almeida RSD, Arns CW, Baracat ECE. Respiratory syncytial virus (RSV) in infants hospitalized for acute lower respiratory tract disease: incidence and associated risks. Braz J Infect Dis 2006; 10:357-61. [PMID: 17293926 DOI: 10.1590/s1413-86702006000500011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2006] [Indexed: 11/21/2022] Open
Abstract
Respiratory syncytial virus (RSV) is one of the main causes of acute lower respiratory tract infections worldwide. We examined the incidence and associated risks for RSV infection in infants hospitalized in two university hospitals in the state of São Paulo. We made a prospective cohort study involving 152 infants hospitalized for acute lower respiratory tract infections (ALRTI) in two university hospitals in Campinas, São Paulo, Brazil, between April and September 2004. Clinical and epidemiological data were obtained at admission. RSV was detected by direct immunofluorescence of nasopharyngeal secretions. Factors associated with RSV infection were assessed by calculating the relative risk (RR). The incidence of RSV infection was 17.5%. Risk factors associated with infection were: gestational age less than 35 weeks (RR: 4.17; 95% confidence interval (CI) 2.21-7.87); birth weight less than or equal to 2,500 grams (RR: 2.69; 95% CI 1.34-5.37); mother's educational level less than five years of schooling (RR: 2.28; 95% CI 1.13-4.59) and pulse oximetry at admission to hospital lower than 90% (RR: 2.19; 95% CI 1.10-4.37). Low birth weight and prematurity are factors associated with respiratory disease due to RSV in infants. Low educational level of the mother and poor socioeconomic conditions also constitute risk factors. Hypoxemia in RSV infections at admission indicates potential severity and a need for early oxygen therapy.
Collapse
|
28
|
Spilki FR, de Almeida RS, Campalans J, Arns CW. Susceptibility of different cell lines to infection with bovine respiratory syncytial virus. J Virol Methods 2006; 131:130-3. [PMID: 16183139 DOI: 10.1016/j.jviromet.2005.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2005] [Revised: 08/09/2005] [Accepted: 08/18/2005] [Indexed: 11/23/2022]
Abstract
The growth of bovine respiratory syncytial virus (BRSV) was evaluated in six different cell lines. Chicken embryo related cells (CER), a chicken embryo fibroblast/baby hamster kidney hybrid and bovine CRIB cells (a bovine viral diarrhea virus-resistant clone of MDBK cells) showed to be the most appropriate for virus multiplication. Both cells provided infectious virus titres of up to 10(5.5) 50% tissue culture infective doses per 100 microl (TCID(50)/100 microl). One-step growth curves revealed no significant differences in the growth of BRSV in these two cell lines. Furthermore, they proved to be susceptible to infection with three different BRSV strains. It was concluded that both CER and CRIB cells may be used for laboratory multiplication of BRSV with optimal results.
Collapse
Affiliation(s)
- Fernando Rosado Spilki
- Laboratório de Virologia Animal, Depto. de Microbiologia e Imunologia, Instituto de Biologia, UNICAMP, Brazil
| | | | | | | |
Collapse
|