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Hong SM, Ha EJ, Kim HW, Kim SJ, Ahn SM, An SH, Kim G, Kim S, Kwon HJ, Choi KS. Effects of G and SH Truncation on the Replication, Virulence, and Immunogenicity of Avian Metapneumovirus. Vaccines (Basel) 2024; 12:106. [PMID: 38276678 PMCID: PMC10818707 DOI: 10.3390/vaccines12010106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/17/2024] [Accepted: 01/19/2024] [Indexed: 01/27/2024] Open
Abstract
Four mutants varying the length of the G and SH genes, including a G-truncated mutant (ΔG) and three G/SH-truncated mutants (ΔSH/G-1, ΔSH/G-2, and ΔSH/G-3), were generated via serially passaging the avian metapneumovirus strain SNU21004 into the cell lines Vero E6 and DF-1 and into embryonated chicken eggs. The mutant ΔG particles resembled parental virus particles except for the variance in the density of their surface projections. G and G/SH truncation significantly affected the viral replication in chickens' tracheal ring culture and in infected chickens but not in the Vero E6 cells. In experimentally infected chickens, mutant ΔG resulted in the restriction of viral replication and the attenuation of the virulence. The mutants ΔG and ΔSH/G-1 upregulated three interleukins (IL-6, IL-12, and IL-18) and three interferons (IFNα, IFNβ, and IFNγ) in infected chickens. In addition, the expression levels of innate immunity-related genes such as Mda5, Rig-I, and Lgp2, in BALB/c mice were also upregulated when compared to the parental virus. Immunologically, the mutant ΔG induced a strong, delayed humoral immune response, while the mutant ΔSH/G-1 induced no humoral immune response. Our findings indicate the potential of the mutant ΔG but not the mutant ΔSH/G-1 as a live attenuated vaccine candidate.
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Affiliation(s)
- Seung-Min Hong
- Laboratory of Avian Diseases, Department of Farm Animal Medicine, College of Veterinary Medicine and BK21 PLUS for Veterinary Science, Seoul National University, Seoul 088026, Republic of Korea; (S.-M.H.); (E.-J.H.); (H.-W.K.); (S.-J.K.); (S.-M.A.)
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul 08826, Republic of Korea;
| | - Eun-Jin Ha
- Laboratory of Avian Diseases, Department of Farm Animal Medicine, College of Veterinary Medicine and BK21 PLUS for Veterinary Science, Seoul National University, Seoul 088026, Republic of Korea; (S.-M.H.); (E.-J.H.); (H.-W.K.); (S.-J.K.); (S.-M.A.)
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul 08826, Republic of Korea;
| | - Ho-Won Kim
- Laboratory of Avian Diseases, Department of Farm Animal Medicine, College of Veterinary Medicine and BK21 PLUS for Veterinary Science, Seoul National University, Seoul 088026, Republic of Korea; (S.-M.H.); (E.-J.H.); (H.-W.K.); (S.-J.K.); (S.-M.A.)
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul 08826, Republic of Korea;
| | - Seung-Ji Kim
- Laboratory of Avian Diseases, Department of Farm Animal Medicine, College of Veterinary Medicine and BK21 PLUS for Veterinary Science, Seoul National University, Seoul 088026, Republic of Korea; (S.-M.H.); (E.-J.H.); (H.-W.K.); (S.-J.K.); (S.-M.A.)
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul 08826, Republic of Korea;
| | - Sun-Min Ahn
- Laboratory of Avian Diseases, Department of Farm Animal Medicine, College of Veterinary Medicine and BK21 PLUS for Veterinary Science, Seoul National University, Seoul 088026, Republic of Korea; (S.-M.H.); (E.-J.H.); (H.-W.K.); (S.-J.K.); (S.-M.A.)
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul 08826, Republic of Korea;
| | - Se-Hee An
- Animal and Plant Quarantine Agency, Gimcheon 39660, Republic of Korea;
| | - Gun Kim
- Laboratory of Veterinary Pharmacology, Research Institute of Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 088026, Republic of Korea;
| | - Suji Kim
- Department of Nuclear Medicine, Seoul National University Bundang Hospital, Seongnam 13620, Republic of Korea;
| | - Hyuk-Joon Kwon
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul 08826, Republic of Korea;
- Laboratory of Poultry Medicine, Department of Farm Animal Medicine, College of Veterinary Medicine and BK21 PLUS for Veterinary Science, Seoul National University, Seoul 088026, Republic of Korea
- Institutes of Green-bio Science Technology (GBST), Farm Animal Clinical Training and Research Center (FACTRC), Seoul National University, Pyeongchang 25354, Republic of Korea
- GeNiner Inc., Seoul 08826, Republic of Korea
| | - Kang-Seuk Choi
- Laboratory of Avian Diseases, Department of Farm Animal Medicine, College of Veterinary Medicine and BK21 PLUS for Veterinary Science, Seoul National University, Seoul 088026, Republic of Korea; (S.-M.H.); (E.-J.H.); (H.-W.K.); (S.-J.K.); (S.-M.A.)
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul 08826, Republic of Korea;
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Lupini C, Tucciarone CM, Mescolini G, Quaglia G, Graziosi G, Turblin V, Brown P, Cecchinato M, Legnardi M, Delquigny T, Lemiere S, Perreul G, Catelli E. Longitudinal Survey on aMPV Circulation in French Broiler Flocks following Different Vaccination Strategies. Animals (Basel) 2022; 13:ani13010057. [PMID: 36611670 PMCID: PMC9817960 DOI: 10.3390/ani13010057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/04/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022] Open
Abstract
In recent years, the impact of respiratory disease resulting from Avian Metapneumovirus (aMPV) infection has been generally rising in the broiler industry in Europe. In this context, in order to investigate aMPV contribution to the clinical picture and the potential benefits of diversified vaccination strategies compared to nonvaccination policies, a longitudinal monitoring was performed, also evaluating Infectious Bronchitis Virus (IBV) presence. Broiler flocks located in Western France, where aMPV has already proven to be a health and productivity issue, were screened by RT-PCR on rhino-pharyngeal swabs, and the viruses were genetically characterized by sequence analysis. For a more comprehensive picture of aMPV molecular epidemiology and evolution in France, aMPV subtype B strains detected from 1985 to 1998 were sequenced and included in the analysis. The survey confirmed the detection of aMPV subtype B in commercial broiler flocks in France, together with a certain heterogeneity demonstrated by the circulation of more recent and historical French field strains. No IBV field strains were detected. The implementation and evaluation of different management choices and vaccine strategies suggests once again that immunization does not prevent infection but contributes greatly to the containment of the clinical manifestations.
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Affiliation(s)
- Caterina Lupini
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano dell’Emilia, BO, Italy
- Correspondence:
| | - Claudia Maria Tucciarone
- Department of Animal Medicine, Production and Health, University of Padua, 35020 Legnaro, PD, Italy
| | - Giulia Mescolini
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano dell’Emilia, BO, Italy
| | - Giulia Quaglia
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano dell’Emilia, BO, Italy
| | - Giulia Graziosi
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano dell’Emilia, BO, Italy
| | - Vincent Turblin
- MC VET Conseil—RESEAU CRISTAL, 72300 Sablé sur Sarthe, France
| | - Paul Brown
- Laboratoire de Ploufragan-Plouzané-Niort, Agence Nationale de Sécurité Sanitairede l’alimentation, de l’environnement et du Travail, B.P., 53-22440 Ploufragan, France
| | - Mattia Cecchinato
- Department of Animal Medicine, Production and Health, University of Padua, 35020 Legnaro, PD, Italy
| | - Matteo Legnardi
- Department of Animal Medicine, Production and Health, University of Padua, 35020 Legnaro, PD, Italy
| | | | | | | | - Elena Catelli
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano dell’Emilia, BO, Italy
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Wang J, Hou L, Wei L, Yan X, Zhu S, Quan R, Li Z, Wang D, Jiang H, Song J, Cui Y, Liu J. Characterization of avain metapneumovirus subgroup C isolated from chickens in Beijing, China. Poult Sci 2022; 102:102250. [PMID: 36435163 PMCID: PMC9700036 DOI: 10.1016/j.psj.2022.102250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 10/11/2022] [Indexed: 11/06/2022] Open
Abstract
Avian metapneumovirus (aMPV) is an important causative agent that causes acute respiratory disease and egg-dropping in chickens and turkeys. Here, we characterized an aMPV subgroup C (aMPV/C) from 320-day-old broiler breeder chickens with severe respiratory diseases in Beijing, China, as evidenced by RT-PCR typing and confirmation of the nucleoprotein (N) gene sequence. The N gene sequence of the aMPV/C strain (designated BJ17) exhibited no deletions or insertions and possessed 94.6% to 99.6% identity to those of published aMPV/C isolates. The phylogenetic tree of the nucleotide sequences constructed using the neighbor-joining clustering method showed that the BJ17 strain formed one cluster with other aMPV/C viruses and formed one subcluster with published Chinese aMPV/C isolates regardless of Muscovy duck or chicken origins. Comparative analysis of the N proteins showed that a unique amino acid residue D at position 110 might be associated with regional distribution due to its occurrence in all the Chinese aMPV/C isolates only. Strain BJ17 was successfully isolated by cultured Vero cell passage and further inoculated in 3-wk-old specific-pathogen-free chickens for the examination of pathogenicity. Animal experimental results showed that BJ17-inoculated chickens had severe respiratory diseases and inflammatory lesions, as demonstrated by pathological changes and aMPV antigen in the nasal turbinate, tracheae, and lung tissues. These results enrich the available information regarding the epidemiology and pathogenicity of aMPV/C in chickens, which may facilitate the development of effective measures against aMPV/C infection in China.
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Affiliation(s)
- Jing Wang
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Haidian District, Beijing, China
| | - Lei Hou
- College of Veterinary Medicine, Yangzhou University, Yangzhou, China,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China
| | - Li Wei
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Haidian District, Beijing, China
| | - Xv Yan
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Haidian District, Beijing, China
| | - Shanshan Zhu
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Haidian District, Beijing, China
| | - Rong Quan
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Haidian District, Beijing, China
| | - Zixuan Li
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Haidian District, Beijing, China
| | - Dan Wang
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Haidian District, Beijing, China
| | - Haijun Jiang
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Haidian District, Beijing, China
| | - Jiangwei Song
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Haidian District, Beijing, China
| | - Yongqiu Cui
- College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Jue Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, China,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, China,Corresponding author:
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Wang S, Jiang N, Jiang L, Zhuang Q, Chen Q, Hou G, Xiao Z, Zhao R, Li Y, Zhao C, Zhang F, Yu J, Li J, Liu H, Sun F, Wang K. Establishment and application of a quadruple real-time RT-PCR for detecting avian metapneumovirus. PLoS One 2022; 17:e0270708. [PMID: 35763505 PMCID: PMC9239461 DOI: 10.1371/journal.pone.0270708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 06/15/2022] [Indexed: 12/02/2022] Open
Abstract
In order to develop an appropriate method for high-throughput detection of avian metapneumovirus, a quadruple real-time reverse-transcription polymerase chain reaction assay was established with four pairs of specific primers and four specific probes based on the G or M gene of aMPV-A, aMPV-B, aMPV-C and aMPV-D. Its specificity and sensitivity were evaluated, and clinical samples were tested by the method. The results showed that all the four subgroups of avian metapneumovirus can be detected in the quadruple real-time RT-PCR assay simultaneously, with a detection limit of 100-1000 cRNA copies/reaction. The other common poultry viruses were negative. In the avian clinical sample detection, 39 out of 1920 clinical samples collected from 8 provinces were positive. Compared with published RT-PCR assays, the κ value of the quadruple real-time RT-PCR assay in 1920 avian clinical samples was 1.000 (P < 0.001). The established method could be used for the rapid detection of the four subgroups of avian metapneumovirus with high specificity and high sensitivity.
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Affiliation(s)
- Suchun Wang
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Nan Jiang
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
- Agricultural College, Yanbian University, Yanji, Jilin, China
| | - Lijian Jiang
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
- Agricultural College, Yanbian University, Yanji, Jilin, China
| | - Qingye Zhuang
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
- Shandong Vocational Animal Science and Veterinary College, Weifang, Shandong, China
| | - Qiong Chen
- Xiamen Agriculture Product Quality and Safety Test Centre, Xiamen, Fujian, China
| | - Guangyu Hou
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Zhiyu Xiao
- Agricultural College, Yanbian University, Yanji, Jilin, China
| | - Ran Zhao
- Xiamen Agriculture Product Quality and Safety Test Centre, Xiamen, Fujian, China
| | - Yang Li
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Chenglong Zhao
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
- Agricultural College, Yanbian University, Yanji, Jilin, China
| | - Fuyou Zhang
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Jianmin Yu
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Jinping Li
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Hualei Liu
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Fuliang Sun
- Agricultural College, Yanbian University, Yanji, Jilin, China
| | - Kaicheng Wang
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
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Nguyen VG, Chung HC, Do HQ, Nguyen TT, Cao TBP, Truong HT, Mai TN, Le TT, Nguyen TH, Le TL, Huynh TML. Serological and Molecular Characterization of Avian Metapneumovirus in Chickens in Northern Vietnam. Vet Sci 2021; 8:vetsci8100206. [PMID: 34679036 PMCID: PMC8538526 DOI: 10.3390/vetsci8100206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/12/2021] [Accepted: 09/20/2021] [Indexed: 11/16/2022] Open
Abstract
Avian Metapneumovirus (aMPV) is a causative agent of respiratory disease complex in turkeys and chickens that has recently been detected in Vietnam. Due to its novelty, this study was conducted to elucidate the distribution of aMPV in several provinces in northern Vietnam. By the application of Enzyme-Linked Immunosorbent Assay (ELISA) and nested Reverse Transcription-Polymerase Chain Reaction (RT-PCR), this study demonstrated the circulation of aMPV in 12 out of 14 cities/provinces with positive rates of 37.6% and 17.2%, respectively. All nested RT-PCR positive samples were aMPV subgroup B. By pairing the detection results with age groups, it was observed that aMPV infections occurred in chickens of all ages. Additionally, by genetic characterization, aMPV strains were demonstrated to not be attenuated vaccine viruses and to belong to at least two genetic clades. Overall, the obtained results provided insights into the prevalence of aMPV and indicated a greater complexity of respiratory diseases in chickens in Vietnam.
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Affiliation(s)
- Van-Giap Nguyen
- Department of Veterinary Microbiology and Infectious Diseases, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi 100000, Vietnam; (V.-G.N.); (T.-B.-P.C.); (H.-T.T.); (T.-N.M.)
| | - Hee-Chun Chung
- Department of Veterinary Medicine Virology Lab., College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Korea; (H.-C.C.); (H.-Q.D.)
| | - Hai-Quynh Do
- Department of Veterinary Medicine Virology Lab., College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Korea; (H.-C.C.); (H.-Q.D.)
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Thanh-Trung Nguyen
- Department of Pharmacology, Toxicology, Internal Medicine and Diagnostics, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi 100000, Vietnam;
| | - Thi-Bich-Phuong Cao
- Department of Veterinary Microbiology and Infectious Diseases, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi 100000, Vietnam; (V.-G.N.); (T.-B.-P.C.); (H.-T.T.); (T.-N.M.)
| | - Ha-Thai Truong
- Department of Veterinary Microbiology and Infectious Diseases, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi 100000, Vietnam; (V.-G.N.); (T.-B.-P.C.); (H.-T.T.); (T.-N.M.)
| | - Thi-Ngan Mai
- Department of Veterinary Microbiology and Infectious Diseases, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi 100000, Vietnam; (V.-G.N.); (T.-B.-P.C.); (H.-T.T.); (T.-N.M.)
| | - Thi-Trinh Le
- Vietnam Green Vet Joint Stock Company, Hanoi 100000, Vietnam;
| | - Thi-Hoa Nguyen
- Key Laboratory for Veterinary Biotechnology, Vietnam National University of Agriculture, Hanoi 100000, Vietnam; (T.-H.N.); (T.-L.L.)
| | - Thi-Luyen Le
- Key Laboratory for Veterinary Biotechnology, Vietnam National University of Agriculture, Hanoi 100000, Vietnam; (T.-H.N.); (T.-L.L.)
| | - Thi-My-Le Huynh
- Department of Veterinary Microbiology and Infectious Diseases, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi 100000, Vietnam; (V.-G.N.); (T.-B.-P.C.); (H.-T.T.); (T.-N.M.)
- Correspondence: ; Tel.: +84-913-081-492
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Umar S, Teillaud A, Aslam HB, Guerin JL, Ducatez MF. Molecular epidemiology of respiratory viruses in commercial chicken flocks in Pakistan from 2014 through to 2016. BMC Vet Res 2019; 15:351. [PMID: 31638995 PMCID: PMC6802313 DOI: 10.1186/s12917-019-2103-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 09/20/2019] [Indexed: 02/07/2023] Open
Abstract
Background Viral diseases are a matter of great concern for poultry farmers in Pakistan. Multiple common viral respiratory diseases (CVRDs) cause huge economic losses in the poultry industry. The prevalence of CVRDs in many countries, including Pakistan, is not clearly understood. Results Incidences of 5 chicken respiratory viruses: avian influenza virus (AIV), Newcastle disease virus (NDV/AAVV-1), infectious bronchitis virus (IBV), avian metapneumovirus (aMPV) and infectious laryngotracheitis virus (ILTV) were assessed on commercial Pakistani farms with respiratory problems from 2014 through to 2016. While AIV and AAVV-1 were frequently detected (16 to 17% of farms), IBV and aMPV were rarely detected (in 3 to 5% of farms) and ILTV was not detected. We characterized H9 AIV of the G1 lineage, genotype VII AAVV-1, GI-13 IBV, and type B aMPV strains with very little genetic variability in the 2-year study period. Co-infections with AIV and AAVV-1 were common and wild type AAVV-1 was detected despite the use of vaccines. Control measures to limit the virus burden in chicken flocks are discussed. Conclusions Our data shows that AIV (H9), AAVV-1, IBV and aMPV are prevalent in commercial poultry in Pakistan. Further studies are necessary to assess circulating strains, economic losses caused by infections and coinfections of these pathogens, and the costs and benefits of countermeasures. Furthermore, veterinarians and farmers should be informed of the pathogens circulating in the field and hence advised on the use of vaccines.
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Affiliation(s)
- Sajid Umar
- IHAP, Université de Toulouse, INRA, ENVT, 23 Chemin des Capelles, 31076, Toulouse, France.,PMAS Arid Agriculture University Rawalpindi, Rawalpindi, Pakistan
| | - Angélique Teillaud
- IHAP, Université de Toulouse, INRA, ENVT, 23 Chemin des Capelles, 31076, Toulouse, France
| | | | - Jean-Luc Guerin
- IHAP, Université de Toulouse, INRA, ENVT, 23 Chemin des Capelles, 31076, Toulouse, France
| | - Mariette F Ducatez
- IHAP, Université de Toulouse, INRA, ENVT, 23 Chemin des Capelles, 31076, Toulouse, France.
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Bayraktar E, Umar S, Yilmaz A, Turan N, Franzo G, Tucciarone CM, Cecchinato M, Cakan B, Iqbal M, Yilmaz H. First Molecular Characterization of Avian Metapneumovirus (aMPV) in Turkish Broiler Flocks. Avian Dis 2018; 62:425-430. [PMID: 31119927 DOI: 10.1637/11915-061818-resnote.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Indexed: 11/05/2022]
Abstract
Viral respiratory diseases, including avian metapneumovirus (aMPV), have a significant economic impact on poultry industries. The frequency and genotype diversity of aMPV in Turkish broiler flocks is not known at present. The aim of this study was to report the first molecular identification and phylogeny of aMPV, which is circulating in Turkish broiler flocks. Trachea tissue samples and tracheal swabs were collected from 110 broiler flocks distributed in different geographical regions in Turkey between March 2017 and March 2018. Detection of aMPV was confirmed with the use of universal reverse transcriptase (RT) PCR, and eight (7.2%) broiler farms were positive for aMPV. Sequence analysis of the G gene revealed the exclusive presence of subtype B viruses. Three field isolates clustered closely with a 2002 Israel isolate, indicating a potential transmission route between these two countries and through the Middle East. The remaining five field isolates were closely related to a vaccine strain, even though broiler flocks in Turkey are not routinely vaccinated against aMPV. Therefore, we speculate these five isolates could have originated from nearby vaccinated turkey farms. Additionally, the presence of some nucleotide substitutions compared to the reference vaccine sequence suggests prolonged circulation and evolution of the original vaccine virus or a vaccine subpopulation was selected under field conditions. This evidence emphasizes the need for further detailed and more systemic approaches to evaluate aMPV spread and evolution in order to design effective control strategies.
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Affiliation(s)
- E Bayraktar
- CEVA Animal Health, Poultry Section, Istanbul, Turkey
| | - S Umar
- Veterinary Faculty, Department of Virology, University of Istanbul-Cerrahpas_a, Avcilar, 34320, Istanbul, Turkey
| | - A Yilmaz
- Veterinary Faculty, Department of Virology, University of Istanbul-Cerrahpas_a, Avcilar, 34320, Istanbul, Turkey
| | - N Turan
- Veterinary Faculty, Department of Virology, University of Istanbul-Cerrahpas_a, Avcilar, 34320, Istanbul, Turkey
| | - G Franzo
- Department of Animal Medicine, Production and Health (MAPS), University of Padua, Viale dell'Università 16, 35020 Legnaro (PD), Italy
| | - C M Tucciarone
- Department of Animal Medicine, Production and Health (MAPS), University of Padua, Viale dell'Università 16, 35020 Legnaro (PD), Italy
| | - M Cecchinato
- Department of Animal Medicine, Production and Health (MAPS), University of Padua, Viale dell'Università 16, 35020 Legnaro (PD), Italy
| | - B Cakan
- CEVA Animal Health, Poultry Section, Istanbul, Turkey
| | - M Iqbal
- The Pirbright Institute, United Kingdom
| | - H Yilmaz
- Veterinary Faculty, Department of Virology, University of Istanbul-Cerrahpas_a, Avcilar, 34320, Istanbul, Turkey,
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Yu M, Xing L, Chang F, Bao Y, Wang S, He X, Wang J, Wang S, Liu Y, Farooque M, Pan Q, Wang Y, Gao L, Qi X, Hussain A, Li K, Liu C, Zhang Y, Cui H, Wang X, Gao Y. Genomic sequence and pathogenicity of the first avian metapneumovirus subtype B isolated from chicken in China. Vet Microbiol 2018; 228:32-38. [PMID: 30593377 DOI: 10.1016/j.vetmic.2018.11.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 11/14/2018] [Accepted: 11/15/2018] [Indexed: 11/17/2022]
Abstract
Avian metapneumovirus (aMPV), which has been reported in many countries, causes an acute upper respiratory tract disease in chickens and turkeys. Although aMPV was first detected in China in 1999, there has been no further effort to isolate and characterize the aMPV subtype B (aMPV/B) from field outbreaks. In the present study, we used Vero cells to culture a viral strain, LN16, isolated from chickens with swollen head syndrome. The results of RT-PCR, indirect immunofluorescent antibody, and G gene sequence analyses confirmed that strain LN16 corresponds to aMPV/B. We amplified and sequenced the complete genome of strain LN16 and found it to be 13,513 nucleotides in length. Nine viral protein genes of the strain were between 93.2% and 98.4% identical to those of the pathogenic field isolate VCO3/60616. However, insertions and deletions were detected in the intergenic regions. Animal experiments showed that 72.7% of chickens infected with strain LN16 had excess mucus, nasal discharge, and inflammation in the lungs and turbinate. In addition, 27.2% of chickens infected with LN16 shed progeny virions. Viral tissue distribution analysis showed that aMPV could be detected in the turbinate and occasionally in immune organs. This is the first report of the isolation of aMPV/B in China and the first complete genome sequence of aMPV/B from chicken. These findings enrich the epidemiological data on aMPV and may contribute to the development of effective measures to prevent its further spread in China.
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Affiliation(s)
- Mengmeng Yu
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Lixiao Xing
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Fangfang Chang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Yuanling Bao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Suyan Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Xijun He
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Jingfei Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Shida Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Yongzhen Liu
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Muhammad Farooque
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Qing Pan
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Yongqiang Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Li Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Xiaole Qi
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Altaf Hussain
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Kai Li
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Changjun Liu
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Yanping Zhang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Hongyu Cui
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China
| | - Xiaomei Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou, 225009, PR China.
| | - Yulong Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, PR China.
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9
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Tucciarone CM, Andreopoulou M, Franzo G, Prentza Z, Chaligiannis I, Cecchinato M. First Identification and Molecular Characterization of Avian metapneumovirus Subtype B from Chickens in Greece. Avian Dis 2017; 61:409-413. [DOI: 10.1637/11631-032017-caser] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Claudia Maria Tucciarone
- Department of Animal Medicine, Production and Health (MAPS), University of Padua, Viale dell'Università 16, 35020 Legnaro (PD), Italy
| | - Marianna Andreopoulou
- Department of Animal Medicine, Production and Health (MAPS), University of Padua, Viale dell'Università 16, 35020 Legnaro (PD), Italy
| | - Giovanni Franzo
- Department of Animal Medicine, Production and Health (MAPS), University of Padua, Viale dell'Università 16, 35020 Legnaro (PD), Italy
| | - Zoi Prentza
- Department of Avian Pathology, Faculty of Veterinary Science, University of Thessaly, Trikalon 224, 43100, Karditsa, Greece
| | - Ilias Chaligiannis
- Directorate of Veterinary Center of Thessaloniki, Ministry of Rural Development and Food, 26th October Street 80, 54627, Thessaloniki, Greece
| | - Mattia Cecchinato
- Department of Animal Medicine, Production and Health (MAPS), University of Padua, Viale dell'Università 16, 35020 Legnaro (PD), Italy
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Sid H, Benachour K, Rautenschlein S. Co-infection with Multiple Respiratory Pathogens Contributes to Increased Mortality Rates in Algerian Poultry Flocks. Avian Dis 2015; 59:440-6. [PMID: 26478165 DOI: 10.1637/11063-031615-case.1] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Respiratory infections are a common cause for increased mortality rates in poultry worldwide. To improve intervention strategies, circulating pathogens have to be identified and further characterized. Because of the lack of diagnostic tools, it was not known what pathogens contribute to the high mortality rates in association with respiratory disease in Algeria. Our objective was to determine if primary pathogens including Mycoplasma gallisepticum (MG), Mycoplasma synoviae (MS), avian influenza virus (AIV), infectious bronchitis virus (IBV), and avian metapneumovirus (aMPV), known to be present in neighboring countries, can also be detected in Algerian chicken and turkey flocks. Results demonstrate the circulation of the investigated pathogens in Algerian poultry flocks as multi-infections. Phylogenetic characterization of the Algerian IBV strains confirmed the circulation of nephropathogenic viruses that are different from the strains isolated in neighboring countries. This could suggest the existence of a new IBV genotype in North Africa. Additionally, we detected for the first time an aMPV subtype B field strain and avian influenza virus. Interestingly, all viral pathogens were present in co-infections with MG, which could exacerbate clinical disease. Additional pathogens may be present and should be investigated in the future. Our results suggest that multiple respiratory infections may be responsible for high mortality in Algerian poultry flocks and very probably also in other regions of the world, which demonstrates the need for the establishment of more comprehensive control strategies.
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11
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Al-Shekaili T, Baylis M, Ganapathy K. Molecular detection of infectious bronchitis and avian metapneumoviruses in Oman backyard poultry. Res Vet Sci 2014; 99:46-52. [PMID: 25613085 PMCID: PMC7111884 DOI: 10.1016/j.rvsc.2014.12.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 12/09/2014] [Accepted: 12/26/2014] [Indexed: 11/30/2022]
Abstract
Infectious bronchitis virus (IBV) and avian metapneumovirus (aMPV) are economically important viral pathogens infecting chickens globally. Identification of endemic IBV and aMPV strains promotes better control of both diseases and prevents production losses. Orophrayngeal swab samples were taken from 2317 birds within 243 different backyard flocks in Oman. Swabs from each flock were examined by RT-PCR using part-S1 and G gene primers for IBV and aMPV respectively. Thirty-nine chicken flocks were positive for IBV. Thirty two of these were genotyped and they were closely related to 793/B, M41, D274, IS/1494/06 and IS/885/00. 793/B-like IBV was also found in one turkey and one duck flock. Five flocks were positive for aMPV subtype B. Though no disease was witnessed at the time of sampling, identified viruses including variant IBV strains, may still pose a threat for both backyard and commercial poultry in Oman.
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Affiliation(s)
- Thunai Al-Shekaili
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, Cheshire, CH64 7TE, UK
| | - Matthew Baylis
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, Cheshire, CH64 7TE, UK
| | - Kannan Ganapathy
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Neston, Cheshire, CH64 7TE, UK.
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12
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Methyltransferase-defective avian metapneumovirus vaccines provide complete protection against challenge with the homologous Colorado strain and the heterologous Minnesota strain. J Virol 2014; 88:12348-63. [PMID: 25122790 DOI: 10.1128/jvi.01095-14] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
UNLABELLED Avian metapneumovirus (aMPV), also known as avian pneumovirus or turkey rhinotracheitis virus, is the causative agent of turkey rhinotracheitis and is associated with swollen head syndrome in chickens. Since its discovery in the 1970s, aMPV has been recognized as an economically important pathogen in the poultry industry worldwide. The conserved region VI (CR VI) of the large (L) polymerase proteins of paramyxoviruses catalyzes methyltransferase (MTase) activities that typically methylate viral mRNAs at guanine N-7 (G-N-7) and ribose 2'-O positions. In this study, we generated a panel of recombinant aMPV (raMPV) Colorado strains carrying mutations in the S-adenosyl methionine (SAM) binding site in the CR VI of L protein. These recombinant viruses were specifically defective in ribose 2'-O, but not G-N-7 methylation and were genetically stable and highly attenuated in cell culture and viral replication in the upper and lower respiratory tracts of specific-pathogen-free (SPF) young turkeys. Importantly, turkeys vaccinated with these MTase-defective raMPVs triggered a high level of neutralizing antibody and were completely protected from challenge with homologous aMPV Colorado strain and heterologous aMPV Minnesota strain. Collectively, our results indicate (i) that aMPV lacking 2'-O methylation is highly attenuated in vitro and in vivo and (ii) that inhibition of mRNA cap MTase can serve as a novel target to rationally design live attenuated vaccines for aMPV and perhaps other paramyxoviruses. IMPORTANCE Paramyxoviruses include many economically and agriculturally important viruses such as avian metapneumovirus (aMPV), and Newcastle disease virus (NDV), human pathogens such as human respiratory syncytial virus, human metapneumovirus, human parainfluenza virus type 3, and measles virus, and highly lethal emerging pathogens such as Nipah virus and Hendra virus. For many of them, there is no effective vaccine or antiviral drug. These viruses share common strategies for viral gene expression and replication. During transcription, paramyxoviruses produce capped, methylated, and polyadenylated mRNAs. Using aMPV as a model, we found that viral ribose 2'-O methyltransferase (MTase) is a novel approach to rationally attenuate the virus for vaccine purpose. Recombinant aMPV (raMPV) lacking 2'-O MTase were not only highly attenuated in turkeys but also provided complete protection against the challenge of homologous and heterologous aMPV strains. This novel approach can be applicable to other animal and human paramyxoviruses for rationally designing live attenuated vaccines.
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Abdel-Azeem AAS, Franzo G, Dalle Zotte A, Drigo M, Catelli E, Lupini C, Martini M, Cecchinato M. First evidence of avian metapneumovirus subtype A infection in turkeys in Egypt. Trop Anim Health Prod 2014; 46:1093-7. [PMID: 24756465 DOI: 10.1007/s11250-014-0591-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2014] [Indexed: 10/25/2022]
Abstract
Although avian metapneumovirus (aMPV) infection has been reported in most regions of the world, to date, only subtype B has been detected in Egypt. At the end of November 2013, dry oropharyngeal swabs were collected during an outbreak of respiratory diseases in a free-range, multi-age turkey dealer farm in Northern Upper Egypt. The clinical signs that appeared when turkeys were 3 weeks-old were characterized by ocular and nasal discharge and swelling of sinuses. aMPV of subtype A was detected by real-time reverse transcription-polymerase chain reaction. In order to confirm the results and obtain more information on the molecular characteristics of the virus, F and G protein genes were partially sequenced and compared with previously published sequences deposited in GenBank by using BLAST. Subtype of the strain was confirmed by sequencing of partial F and G protein genes. The highest percentages of identity were observed when G sequence of the Egyptian strain was compared with the sequence of an aMPV-A isolated in Nigeria (96.4 %) and when the F sequence was compared with strains isolated respectively in Italy and in UK (97.1 %). Moreover, the alignment of the sequences with commercial subtype A vaccine or vaccine-derived strains showed differences in the Egyptian strain that indicate its probable field origin. The detection of aMPV in the investigated turkey flock highlights some relevant epidemiological issues regarding the role that multi-age farms and dealers may play in perpetuating aMPV infection within and among farms. To our knowledge, this is the first report of aMPV subtype A in Egypt.
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Wei Y, Feng K, Yao X, Cai H, Li J, Mirza AM, Iorio RM, Li J. Localization of a region in the fusion protein of avian metapneumovirus that modulates cell-cell fusion. J Virol 2012; 86:11800-14. [PMID: 22915815 PMCID: PMC3486300 DOI: 10.1128/jvi.00232-12] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Accepted: 08/12/2012] [Indexed: 11/20/2022] Open
Abstract
The genus Metapneumovirus within the subfamily Pneumovirinae of the family Paramyxoviridae includes two members, human metapneumovirus (hMPV) and avian metapneumovirus (aMPV), causing respiratory tract infections in humans and birds, respectively. Paramyxoviruses enter host cells by fusing the viral envelope with a host cell membrane. Membrane fusion of hMPV appears to be unique, in that fusion of some hMPV strains requires low pH. Here, we show that the fusion (F) proteins of aMPV promote fusion in the absence of the attachment protein and low pH is not required. Furthermore, there are notable differences in cell-cell fusion among aMPV subtypes. Trypsin was required for cell-cell fusion induced by subtype B but not subtypes A and C. The F protein of aMPV subtype A was highly fusogenic, whereas those from subtypes B and C were not. By construction and evaluation of chimeric F proteins composed of domains from the F proteins of subtypes A and B, we localized a region composed of amino acid residues 170 to 338 in the F protein that is responsible for the hyperfusogenic phenotype of the F from subtype A. Further mutagenesis analysis revealed that residues R295, G297, and K323 in this region collectively contributed to the hyperfusogenicity. Taken together, we have identified a region in the aMPV F protein that modulates the extent of membrane fusion. A model for fusion consistent with these data is presented.
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Affiliation(s)
- Yongwei Wei
- Department of Food Science and Technology, College of Food, Agricultural and Environmental Sciences
| | - Kurtis Feng
- Department of Food Science and Technology, College of Food, Agricultural and Environmental Sciences
| | - Xiangjie Yao
- Department of Food Science and Technology, College of Food, Agricultural and Environmental Sciences
| | - Hui Cai
- Department of Food Science and Technology, College of Food, Agricultural and Environmental Sciences
| | - Junan Li
- Division of Environmental Health Sciences, College of Public Health
| | - Anne M. Mirza
- Department of Microbiology and Physiological Systems
| | - Ronald M. Iorio
- Department of Microbiology and Physiological Systems
- Program in Immunology and Virology, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Jianrong Li
- Department of Food Science and Technology, College of Food, Agricultural and Environmental Sciences
- Division of Environmental Health Sciences, College of Public Health
- Center for RNA Biology, The Ohio State University, Columbus, Ohio, USA
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Rubbenstroth D, Rautenschlein S. Compromised T-cell immunity in turkeys may lead to an unpredictable avian metapneumovirus vaccine response and variable protection against challenge. Avian Pathol 2010; 39:349-57. [DOI: 10.1080/03079457.2010.507240] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Cecchinato M, Catelli E, Lupini C, Ricchizzi E, Clubbe J, Battilani M, Naylor CJ. Avian metapneumovirus (AMPV) attachment protein involvement in probable virus evolution concurrent with mass live vaccine introduction. Vet Microbiol 2010; 146:24-34. [PMID: 20447777 DOI: 10.1016/j.vetmic.2010.04.014] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Revised: 04/09/2010] [Accepted: 04/12/2010] [Indexed: 11/17/2022]
Abstract
Avian metapneumoviruses detected in Northern Italy between 1987 and 2007 were sequenced in their fusion (F) and attachment (G) genes together with the same genes from isolates collected throughout western European prior to 1994. Fusion protein genes sequences were highly conserved while G protein sequences showed much greater heterogeneity. Phylogenetic studies based on both genes clearly showed that later Italian viruses were significantly different to all earlier virus detections, including early detections from Italy. Furthermore a serine residue in the G proteins and lysine residue in the fusion protein were exclusive to Italian viruses, indicating that later viruses probably arose within the country and the notion that these later viruses evolved from earlier Italian progenitors cannot be discounted. Biocomputing analysis applied to F and G proteins of later Italian viruses predicted that only G contained altered T cell epitopes. It appears likely that Italian field viruses evolved in response to selection pressure from vaccine induced immunity.
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Affiliation(s)
- Mattia Cecchinato
- Dipartimento di Sanità Pubblica, Patologia Comparata e Igiene Veterinaria, Faculty of Veterinary Medicine, University of Padua, Viale dell'Università 16, 35020 Legnaro, PD, Italy.
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Ongor H, Karahan M, Kalin R, Bulut H, Cetinkaya B. Detection of avian metapneumovirus subtypes in turkeys using RT-PCR. Vet Rec 2010; 166:363-6. [DOI: 10.1136/vr.c1607] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
| | | | | | - H. Bulut
- Department of Virology; Faculty of Veterinary Medicine; University of Firat; 23119 Elazig Turkey
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Propagation of avian metapneumovirus subtypes A and B using chicken embryo related and other cell systems. J Virol Methods 2010; 167:1-4. [PMID: 20219543 DOI: 10.1016/j.jviromet.2010.02.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Revised: 02/15/2010] [Accepted: 02/18/2010] [Indexed: 11/20/2022]
Abstract
Primary isolation of avian metapneumovirus (aMPV) is carried out using tracheal organ culture (TOC) or chicken embryonated eggs with subsequent adaptation in chicken embryo fibroblasts (CEF) or Vero cultures. This study was conducted to evaluate six different cell lines and two avian culture systems for the propagation of aMPV subtypes A and B. The chicken embryo related (CER) cells were used successfully for primary isolation. In addition to Vero and baby hamster kidney (BHK-21) cells, CER cells were also shown to be the most appropriate for propagation of aMPV considering high titres. Propagation of A and B subtypes in CEF and TOC remained efficient after the primary isolation and several passages of viruses in the CER cell line. The growth curves were created using CER, Vero and BHK-21 cell lines. Compared with growth, both yielded higher titres in CER cells during the first 30 h after infection, but no significant difference was observed in the results obtained from CER and Vero cells. This data show that CER cells are adequate for aMPV subtypes A and B propagation, giving similar results to Vero cells.
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