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Mo J, Mo J. Infectious Laryngotracheitis Virus and Avian Metapneumovirus: A Comprehensive Review. Pathogens 2025; 14:55. [PMID: 39861016 PMCID: PMC11769561 DOI: 10.3390/pathogens14010055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2024] [Revised: 01/08/2025] [Accepted: 01/08/2025] [Indexed: 01/27/2025] Open
Abstract
Respiratory avian viral diseases significantly impact the world poultry sector, leading to notable economic losses. The highly contagious DNA virus, infectious laryngotracheitis virus, and the RNA virus, avian metapneumovirus, are well known for their prevalent effects on avian respiratory systems. The infectious laryngotracheitis virus (ILTV), stemming from the Herpesviridae family, manifests as an upper respiratory disease within birds. Characterized by acute respiratory signs, it sporadically emerges worldwide, presenting a persistent threat to poultry health. Avian metapneumovirus (aMPV), belonging to the Pneumoviridae family is identified as the cause behind severe rhinotracheitis in turkeys and swollen head syndrome in chickens. This disease can lead to heightened mortality rates, especially when coupled with secondary bacterial infections. This review offers a comprehensive analysis and understanding of the general properties of these specific avian respiratory viruses, control measures, and their global status.
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Affiliation(s)
- Jongsuk Mo
- Exotic and Emerging Avian Disease Research Unit, U.S. National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture (USDA), Athens, GA 30605, USA;
| | - Jongseo Mo
- College of Pharmacy, Yeungnam University, Gyeongsan-si 38541, Gyeongsangbuk-do, Republic of Korea
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Brynes A, Williams JV. Small hydrophobic (SH) proteins of Pneumoviridae and Paramyxoviridae: small but mighty. J Virol 2024; 98:e0080924. [PMID: 39177356 PMCID: PMC11407002 DOI: 10.1128/jvi.00809-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024] Open
Abstract
Small hydrophobic (SH) proteins are a class of viral accessory proteins expressed by many members of the negative-stranded RNA viral families Paramyxoviridae and Pneumoviridae. Identified SH proteins are type I or II transmembrane (TM) proteins with a single-pass TM domain. Little is known about the functions of SH proteins; however, several possess viroporin activity, enhancing membrane permeability of infected cells or those expressing SH protein. Moreover, several SH proteins inhibit apoptosis and immune signaling pathways within infected cells, including TNF and interferon signaling, or activate inflammasomes. SH proteins are generally nonessential for viral replication in vitro, but loss of SH is often associated with reduced replication in vivo, suggesting a role in enhancing viral replication or evading host immunity. Analogous proteins are expressed by a variety of pathogens of public health importance; thus, understanding the functional importance and mechanisms of SH proteins provides insight into the pathogenesis and replication of negative-sense RNA viruses.
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Affiliation(s)
- Adam Brynes
- Program in Microbiology & Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - John V. Williams
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of Microbiology & Molecular Genetics, University of Pittsburgh School of Medicine, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
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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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Kariithi HM, Christy N, Decanini EL, Lemiere S, Volkening JD, Afonso CL, Suarez DL. Detection and Genome Sequence Analysis of Avian Metapneumovirus Subtype A Viruses Circulating in Commercial Chicken Flocks in Mexico. Vet Sci 2022; 9:vetsci9100579. [PMID: 36288192 PMCID: PMC9612082 DOI: 10.3390/vetsci9100579] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/14/2022] [Accepted: 10/17/2022] [Indexed: 11/11/2022] Open
Abstract
Avian metapneumoviruses (aMPV subtypes A-D) are respiratory and reproductive pathogens of poultry. Since aMPV-A was initially reported in Mexico in 2014, there have been no additional reports of its detection in the country. Using nontargeted next-generation sequencing (NGS) of FTA card-spotted respiratory samples from commercial chickens in Mexico, seven full genome sequences of aMPV-A (lengths of 13,288-13,381 nucleotides) were de novo assembled. Additionally, complete coding sequences of genes N (n = 2), P and M (n = 7 each), F and L (n = 1 each), M2 (n = 6), SH (n = 5) and G (n = 2) were reference-based assembled from another seven samples. The Mexican isolates phylogenetically group with, but in a distinct clade separate from, other aMPV-A strains. The genome and G-gene nt sequences of the Mexican aMPVs are closest to strain UK/8544/06 (97.22-97.47% and 95.07-95.83%, respectively). Various amino acid variations distinguish the Mexican isolates from each other, and other aMPV-A strains, most of which are in the G (n = 38), F (n = 12), and L (n = 19) proteins. Using our sequence data and publicly available aMPV-A data, we revised a previously published rRT-PCR test, which resulted in different cycling and amplification conditions for aMPV-A to make it more compatible with other commonly used rRT-PCR diagnostic cycling conditions. This is the first comprehensive sequence analysis of aMPVs in Mexico and demonstrates the value of nontargeted NGS to identify pathogens where targeted virus surveillance is likely not routinely performed.
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Affiliation(s)
- Henry M. Kariithi
- Exotic and Emerging Avian Viral Diseases Research Unit, Southeast Poultry Research Laboratory, U.S. National Poultry Research Center, USDA-ARS, Athens, GA 30605, USA
- Biotechnology Research Institute, Kenya Agricultural and Livestock Research Organization, Kaptagat Rd, Nairobi P.O. Box 57811-00200, Kenya
- Correspondence: (H.M.K.); (D.L.S.); Tel.: +1-(706)-546-3479 (D.L.S.)
| | - Nancy Christy
- Boehringer Ingelheim Animal Health, Guadalajara 44940, Mexico
| | - Eduardo L. Decanini
- Boehringer Ingelheim Animal Health IMETA, Dubai P.O. Box 507066, United Arab Emirates
| | | | | | | | - David L. Suarez
- Exotic and Emerging Avian Viral Diseases Research Unit, Southeast Poultry Research Laboratory, U.S. National Poultry Research Center, USDA-ARS, Athens, GA 30605, USA
- Correspondence: (H.M.K.); (D.L.S.); Tel.: +1-(706)-546-3479 (D.L.S.)
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Zoonotic Origins of Human Metapneumovirus: A Journey from Birds to Humans. Viruses 2022; 14:v14040677. [PMID: 35458407 PMCID: PMC9028271 DOI: 10.3390/v14040677] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/23/2022] [Accepted: 03/23/2022] [Indexed: 01/13/2023] Open
Abstract
Metapneumoviruses, members of the family Pneumoviridae, have been identified in birds (avian metapneumoviruses; AMPV’s) and humans (human metapneumoviruses; HMPV’s). AMPV and HMPV are closely related viruses with a similar genomic organization and cause respiratory tract illnesses in birds and humans, respectively. AMPV can be classified into four subgroups, A–D, and is the etiological agent of turkey rhinotracheitis and swollen head syndrome in chickens. Epidemiological studies have indicated that AMPV also circulates in wild bird species which may act as reservoir hosts for novel subtypes. HMPV was first discovered in 2001, but retrospective studies have shown that HMPV has been circulating in humans for at least 50 years. AMPV subgroup C is more closely related to HMPV than to any other AMPV subgroup, suggesting that HMPV has evolved from AMPV-C following zoonotic transfer. In this review, we present a historical perspective on the discovery of metapneumoviruses and discuss the host tropism, pathogenicity, and molecular characteristics of the different AMPV and HMPV subgroups to provide increased focus on the necessity to better understand the evolutionary pathways through which HMPV emerged as a seasonal endemic human respiratory virus.
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The small hydrophobic (SH) gene of North American turkey AMPV-C does not attenuate nor modify host tropism in recombinant European duck AMPV-C. Virology 2019; 526:138-145. [DOI: 10.1016/j.virol.2018.10.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 10/04/2018] [Accepted: 10/19/2018] [Indexed: 11/20/2022]
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Lemaitre E, Allée C, Vabret A, Eterradossi N, Brown PA. Single reaction, real time RT-PCR detection of all known avian and human metapneumoviruses. J Virol Methods 2017; 251:61-68. [PMID: 29030071 PMCID: PMC7119483 DOI: 10.1016/j.jviromet.2017.10.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 10/09/2017] [Accepted: 10/09/2017] [Indexed: 11/22/2022]
Abstract
Detection of all known avian and human MPV subgroups in a single reaction rRT-PCR. Highly sensitive and specific method using SYBR Green I technology. Complete validation of the method for detection of avian metapneumoviruses.
Current molecular methods for the detection of avian and human metapneumovirus (AMPV, HMPV) are specifically targeted towards each virus species or individual subgroups of these. Here a broad range SYBR Green I real time RT-PCR was developed which amplified a highly conserved fragment of sequence in the N open reading frame. This method was sufficiently efficient and specific in detecting all MPVs. Its validation according to the NF U47-600 norm for the four AMPV subgroups estimated low limits of detection between 1000 and 10 copies/μL, similar with detection levels described previously for real time RT-PCRs targeting specific subgroups. RNA viruses present a challenge for the design of durable molecular diagnostic test due to the rate of change in their genome sequences which can vary substantially in different areas and over time. The fact that the regions of sequence for primer hybridization in the described method have remained sufficiently conserved since the AMPV and HMPV diverged, should give the best chance of continued detection of current subgroups and of potential unknown or future emerging MPV strains.
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Affiliation(s)
- E Lemaitre
- Université Européenne de Bretagne, Anses (French Agency for Food, Environmental and Occupational Health Safety), Ploufragan/Plouzané Laboratory, Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), OIE Reference Laboratory for Turkey Rhinotracheitis, B.P.53, 22440 Ploufragan, France
| | - C Allée
- Université Européenne de Bretagne, Anses (French Agency for Food, Environmental and Occupational Health Safety), Ploufragan/Plouzané Laboratory, Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), OIE Reference Laboratory for Turkey Rhinotracheitis, B.P.53, 22440 Ploufragan, France
| | - A Vabret
- Department of Virology, University Hospital of Caen, 14033 Caen, France
| | - N Eterradossi
- Université Européenne de Bretagne, Anses (French Agency for Food, Environmental and Occupational Health Safety), Ploufragan/Plouzané Laboratory, Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), OIE Reference Laboratory for Turkey Rhinotracheitis, B.P.53, 22440 Ploufragan, France
| | - P A Brown
- Université Européenne de Bretagne, Anses (French Agency for Food, Environmental and Occupational Health Safety), Ploufragan/Plouzané Laboratory, Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), OIE Reference Laboratory for Turkey Rhinotracheitis, B.P.53, 22440 Ploufragan, France.
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Yun B, Zhang Y, Liu Y, Guan X, Wang Y, Qi X, Cui H, Liu C, Zhang Y, Gao H, Gao L, Li K, Gao Y, Wang X. TMPRSS12 Is an Activating Protease for Subtype B Avian Metapneumovirus. J Virol 2016; 90:11231-11246. [PMID: 27707927 PMCID: PMC5126379 DOI: 10.1128/jvi.01567-16] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 09/29/2016] [Indexed: 12/28/2022] Open
Abstract
The entry of avian metapneumovirus (aMPV) into host cells initially requires the fusion of viral and cell membranes, which is exclusively mediated by fusion (F) protein. Proteolysis of aMPV F protein by endogenous proteases of host cells allows F protein to induce membrane fusion; however, these proteases have not been identified. Here, we provide the first evidence that the transmembrane serine protease TMPRSS12 facilitates the cleavage of subtype B aMPV (aMPV/B) F protein. We found that overexpression of TMPRSS12 enhanced aMPV/B F protein cleavage, F protein fusogenicity, and viral replication. Subsequently, knockdown of TMPRSS12 with specific small interfering RNAs (siRNAs) reduced aMPV/B F protein cleavage, F protein fusogenicity, and viral replication. We also found a cleavage motif in the aMPV/B F protein (amino acids 100 and 101) that was recognized by TMPRSS12. The histidine, aspartic acid, and serine residue (HDS) triad of TMPRSS12 was shown to be essential for the proteolysis of aMPV/B F protein via mutation analysis. Notably, we observed TMPRSS12 mRNA expression in target organs of aMPV/B in chickens. Overall, our results indicate that TMPRSS12 is crucial for aMPV/B F protein proteolysis and aMPV/B infectivity and that TMPRSS12 may serve as a target for novel therapeutics and prophylactics for aMPV. IMPORTANCE Proteolysis of the aMPV F protein is a prerequisite for F protein-mediated membrane fusion of virus and cell and for aMPV infection; however, the proteases used in vitro and vivo are not clear. A combination of analyses, including overexpression, knockdown, and mutation methods, demonstrated that the transmembrane serine protease TMPRSS12 facilitated cleavage of subtype B aMPV (aMPV/B) F protein. Importantly, we located the motif in the aMPV/B F protein recognized by TMPRSS12 and the catalytic triad in TMPRSS12 that facilitated proteolysis of the aMPV/B F protein. This is the first report on TMPRSS12 as a protease for proteolysis of viral envelope glycoproteins. Our study will shed light on the mechanism of proteolysis of aMPV F protein and pathogenesis of aMPV.
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Affiliation(s)
- Bingling Yun
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Yao Zhang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Yongzhen Liu
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Xiaolu Guan
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Yongqiang Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Xiaole Qi
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Hongyu Cui
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Changjun Liu
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Yanping Zhang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Honglei Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Li Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Kai Li
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Yulong Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
| | - Xiaomei Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Nan Gang District, Harbin, Heilongjiang Province, People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, People's Republic of China
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Laconi A, Clubbe J, Falchieri M, Lupini C, Cecchinato M, Catelli E, Listorti V, Naylor CJ. A comparison of AMPV subtypes A and B full genomes, gene transcripts and proteins led to reverse-genetics systems rescuing both subtypes. J Gen Virol 2016; 97:1324-1332. [DOI: 10.1099/jgv.0.000450] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- Andrea Laconi
- Department of Infection Biology, University of Liverpool, Leahurst Campus, Neston, Cheshire, CH64 7TE, UK
| | - Jayne Clubbe
- Department of Infection Biology, University of Liverpool, Leahurst Campus, Neston, Cheshire, CH64 7TE, UK
| | - Marco Falchieri
- Department of Infection Biology, University of Liverpool, Leahurst Campus, Neston, Cheshire, CH64 7TE, UK
| | - Caterina Lupini
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano Emilia, BO, Italy
| | - Mattia Cecchinato
- Department of Animal Medicine, Production and Health, University of Padua, Viale dell'università, 16, Legnaro, PD, Italy
| | - Elena Catelli
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano Emilia, BO, Italy
| | - Valeria Listorti
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano Emilia, BO, Italy
| | - Clive J. Naylor
- Department of Infection Biology, University of Liverpool, Leahurst Campus, Neston, Cheshire, CH64 7TE, UK
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Yun BL, Guan XL, Liu YZ, Zhang Y, Wang YQ, Qi XL, Cui HY, Liu CJ, Zhang YP, Gao HL, Gao L, Li K, Gao YL, Wang XM. Integrin αvβ1 Modulation Affects Subtype B Avian Metapneumovirus Fusion Protein-mediated Cell-Cell Fusion and Virus Infection. J Biol Chem 2016; 291:14815-25. [PMID: 27226547 DOI: 10.1074/jbc.m115.711382] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Indexed: 01/08/2023] Open
Abstract
Avian metapneumovirus (aMPV) fusion (F) protein mediates virus-cell membrane fusion to initiate viral infection, which requires F protein binding to its receptor(s) on the host cell surface. However, the receptor(s) for aMPV F protein is still not identified. All known subtype B aMPV (aMPV/B) F proteins contain a conserved Arg-Asp-Asp (RDD) motif, suggesting that the aMPV/B F protein may mediate membrane fusion via the binding of RDD to integrin. When blocked with integrin-specific peptides, aMPV/B F protein fusogenicity and viral replication were significantly reduced. Specifically we identified integrin αv and/or β1-mediated F protein fusogenicity and viral replication using antibody blocking, small interfering RNAs (siRNAs) knockdown, and overexpression. Additionally, overexpression of integrin αv and β1 in aMPV/B non-permissive cells conferred aMPV/B F protein binding and aMPV/B infection. When RDD was altered to RAE (Arg-Ala-Glu), aMPV/B F protein binding and fusogenic activity were profoundly impaired. These results suggest that integrin αvβ1 is a functional receptor for aMPV/B F protein-mediated membrane fusion and virus infection, which will provide new insights on the fusogenic mechanism and pathogenesis of aMPV.
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Affiliation(s)
- Bing-Ling Yun
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Xiao-Lu Guan
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Yong-Zhen Liu
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Yao Zhang
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Yong-Qiang Wang
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Xiao-Le Qi
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Hong-Yu Cui
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Chang-Jun Liu
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Yan-Ping Zhang
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Hong-Lei Gao
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Li Gao
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Kai Li
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Yu-Long Gao
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and
| | - Xiao-Mei Wang
- From the Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 427 Maduan Street, Nan Gang District, Harbin 150001, Heilongjiang Province and the Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou 225009, China
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Trypsin- and low pH-mediated fusogenicity of avian metapneumovirus fusion proteins is determined by residues at positions 100, 101 and 294. Sci Rep 2015; 5:15584. [PMID: 26498473 PMCID: PMC4620442 DOI: 10.1038/srep15584] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 09/29/2015] [Indexed: 12/03/2022] Open
Abstract
Avian metapneumovirus (aMPV) and human metapneumovirus (hMPV) are members of the genus Metapneumovirus in the subfamily Pneumovirinae. Metapneumovirus fusion (F) protein mediates the fusion of host cells with the virus membrane for infection. Trypsin- and/or low pH-induced membrane fusion is a strain-dependent phenomenon for hMPV. Here, we demonstrated that three subtypes of aMPV (aMPV/A, aMPV/B, and aMPV/C) F proteins promoted cell-cell fusion in the absence of trypsin. Indeed, in the presence of trypsin, only aMPV/C F protein fusogenicity was enhanced. Mutagenesis of the amino acids at position 100 and/or 101, located at a putative cleavage region in aMPV F proteins, revealed that the trypsin-mediated fusogenicity of aMPV F proteins is regulated by the residues at positions 100 and 101. Moreover, we demonstrated that aMPV/A and aMPV/B F proteins mediated cell-cell fusion independent of low pH, whereas the aMPV/C F protein did not. Mutagenesis of the residue at position 294 in the aMPV/A, aMPV/B, and aMPV/C F proteins showed that 294G played a critical role in F protein-mediated fusion under low pH conditions. These findings on aMPV F protein-induced cell-cell fusion provide new insights into the molecular mechanisms underlying membrane fusion and pathogenesis of aMPV.
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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: 1.6] [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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Paramyxovirus glycoprotein incorporation, assembly and budding: a three way dance for infectious particle production. Viruses 2014; 6:3019-54. [PMID: 25105277 PMCID: PMC4147685 DOI: 10.3390/v6083019] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 07/24/2014] [Accepted: 07/25/2014] [Indexed: 12/21/2022] Open
Abstract
Paramyxoviruses are a family of negative sense RNA viruses whose members cause serious diseases in humans, such as measles virus, mumps virus and respiratory syncytial virus; and in animals, such as Newcastle disease virus and rinderpest virus. Paramyxovirus particles form by assembly of the viral matrix protein, the ribonucleoprotein complex and the surface glycoproteins at the plasma membrane of infected cells and subsequent viral budding. Two major glycoproteins expressed on the viral envelope, the attachment protein and the fusion protein, promote attachment of the virus to host cells and subsequent virus-cell membrane fusion. Incorporation of the surface glycoproteins into infectious progeny particles requires coordinated interplay between the three viral structural components, driven primarily by the matrix protein. In this review, we discuss recent progress in understanding the contributions of the matrix protein and glycoproteins in driving paramyxovirus assembly and budding while focusing on the viral protein interactions underlying this process and the intracellular trafficking pathways for targeting viral components to assembly sites. Differences in the mechanisms of particle production among the different family members will be highlighted throughout.
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14
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Brown PA, Lemaitre E, Briand FX, Courtillon C, Guionie O, Allée C, Toquin D, Bayon-Auboyer MH, Jestin V, Eterradossi N. Molecular comparisons of full length metapneumovirus (MPV) genomes, including newly determined French AMPV-C and -D isolates, further supports possible subclassification within the MPV Genus. PLoS One 2014; 9:e102740. [PMID: 25036224 PMCID: PMC4103871 DOI: 10.1371/journal.pone.0102740] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 06/20/2014] [Indexed: 01/12/2023] Open
Abstract
Four avian metapneumovirus (AMPV) subgroups (A-D) have been reported previously based on genetic and antigenic differences. However, until now full length sequences of the only known isolates of European subgroup C and subgroup D viruses (duck and turkey origin, respectively) have been unavailable. These full length sequences were determined and compared with other full length AMPV and human metapneumoviruses (HMPV) sequences reported previously, using phylogenetics, comparisons of nucleic and amino acid sequences and study of codon usage bias. Results confirmed that subgroup C viruses were more closely related to HMPV than they were to the other AMPV subgroups in the study. This was consistent with previous findings using partial genome sequences. Closer relationships between AMPV-A, B and D were also evident throughout the majority of results. Three metapneumovirus "clusters" HMPV, AMPV-C and AMPV-A, B and D were further supported by codon bias and phylogenetics. The data presented here together with those of previous studies describing antigenic relationships also between AMPV-A, B and D and between AMPV-C and HMPV may call for a subclassification of metapneumoviruses similar to that used for avian paramyxoviruses, grouping AMPV-A, B and D as type I metapneumoviruses and AMPV-C and HMPV as type II.
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Affiliation(s)
- Paul A. Brown
- French Agency for Food, Environmental and Occupational Health Safety (ANSES), Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), Université Européenne de Bretagne, Ploufragan/Plouzané laboratory, Ploufragan, France
| | - Evelyne Lemaitre
- French Agency for Food, Environmental and Occupational Health Safety (ANSES), Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), Université Européenne de Bretagne, Ploufragan/Plouzané laboratory, Ploufragan, France
| | - François-Xavier Briand
- French Agency for Food, Environmental and Occupational Health Safety (ANSES), Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), Université Européenne de Bretagne, Ploufragan/Plouzané laboratory, Ploufragan, France
| | - Céline Courtillon
- French Agency for Food, Environmental and Occupational Health Safety (ANSES), Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), Université Européenne de Bretagne, Ploufragan/Plouzané laboratory, Ploufragan, France
| | - Olivier Guionie
- French Agency for Food, Environmental and Occupational Health Safety (ANSES), Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), Université Européenne de Bretagne, Ploufragan/Plouzané laboratory, Ploufragan, France
| | - Chantal Allée
- French Agency for Food, Environmental and Occupational Health Safety (ANSES), Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), Université Européenne de Bretagne, Ploufragan/Plouzané laboratory, Ploufragan, France
| | - Didier Toquin
- French Agency for Food, Environmental and Occupational Health Safety (ANSES), Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), Université Européenne de Bretagne, Ploufragan/Plouzané laboratory, Ploufragan, France
| | - Marie-Hélène Bayon-Auboyer
- French Agency for Food, Environmental and Occupational Health Safety (ANSES), Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), Université Européenne de Bretagne, Ploufragan/Plouzané laboratory, Ploufragan, France
| | - Véronique Jestin
- French Agency for Food, Environmental and Occupational Health Safety (ANSES), Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), Université Européenne de Bretagne, Ploufragan/Plouzané laboratory, Ploufragan, France
| | - Nicolas Eterradossi
- French Agency for Food, Environmental and Occupational Health Safety (ANSES), Avian and Rabbit Virology Immunology and Parasitology Unit (VIPAC), Université Européenne de Bretagne, Ploufragan/Plouzané laboratory, Ploufragan, France
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15
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The human metapneumovirus small hydrophobic protein has properties consistent with those of a viroporin and can modulate viral fusogenic activity. J Virol 2014; 88:6423-33. [PMID: 24672047 DOI: 10.1128/jvi.02848-13] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED Human metapneumovirus (HMPV) encodes three glycoproteins: the glycoprotein, which plays a role in glycosaminoglycan binding, the fusion (F) protein, which is necessary and sufficient for both viral binding to the target cell and fusion between the cellular plasma membrane and the viral membrane, and the small hydrophobic (SH) protein, whose function is unclear. The SH protein of the closely related respiratory syncytial virus has been suggested to function as a viroporin, as it forms oligomeric structures consistent with a pore and alters membrane permeability. Our analysis indicates that both the full-length HMPV SH protein and the isolated SH protein transmembrane domain can associate into higher-order oligomers. In addition, HMPV SH expression resulted in increases in permeability to hygromycin B and alteration of subcellular localization of a fluorescent dye, indicating that SH affects membrane permeability. These results suggest that the HMPV SH protein has several characteristics consistent with a putative viroporin. Interestingly, we also report that expression of the HMPV SH protein can significantly decrease HMPV F protein-promoted membrane fusion activity, with the SH extracellular domain and transmembrane domain playing a key role in this inhibition. These results suggest that the HMPV SH protein could regulate both membrane permeability and fusion protein function during viral infection. IMPORTANCE Human metapneumovirus (HMPV), first identified in 2001, is a causative agent of severe respiratory tract disease worldwide. The small hydrophobic (SH) protein is one of three glycoproteins encoded by all strains of HMPV, but the function of the HMPV SH protein is unknown. We have determined that the HMPV SH protein can alter the permeability of cellular membranes, suggesting that HMPV SH is a member of a class of proteins termed viroporins, which modulate membrane permeability to facilitate critical steps in a viral life cycle. We also demonstrated that HMPV SH can inhibit the membrane fusion function of the HMPV fusion protein. This work suggests that the HMPV SH protein has several functions, though the steps in the HMPV life cycle impacted by these functions remain to be clarified.
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16
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Brown PA, Briand FX, Guionie O, Lemaitre E, Courtillon C, Henry A, Jestin V, Eterradossi N. An alternative method to determine the 5' extremities of non-segmented, negative sense RNA viral genomes using positive replication intermediate 3' tailing: application to two members of the Paramyxoviridae family. J Virol Methods 2013; 193:121-7. [PMID: 23707921 DOI: 10.1016/j.jviromet.2013.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 04/30/2013] [Accepted: 05/15/2013] [Indexed: 10/26/2022]
Abstract
Determining the sequence of non-segmented, negative sense RNA viral genomes is far from routine and often requires the application of several techniques. In this study, an existing method used currently just for determination of the genomic 3' extremity was used to determine both the 3' and 5' sequence extremities of a Newcastle disease virus and an avian metapneumovirus. This was achieved with a single 3' nucleotide tailing reaction of both the genomic RNA and the full length, positive sense, antigenomic RNA, followed by a single reverse transcription reaction targeted to the common polynucleotide tails, and then individual PCRs specific for each extremity using PCR primers derived from the sequence of the RT primer or from neighbouring virus sequences known previously. For each virus the method was employed separately. Sequences from both viruses were in agreement with those reported previously for other paramyxoviruses, yet one extra base at the 3' and one extra base at the 5' were identified for the avian metapneumovirus. In this study, importantly, the newly determined extremities maintained the complementarity known to exist between the extremities of these viruses. The method was equally successful with both viruses and can be tailored easily to function with other non-segmented, negative sense viruses through minor modification of only the primer sequences.
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Affiliation(s)
- Paul A Brown
- Anses, French Agency for Food, Environmental and Occupational Health Safety, Ploufragan/Plouzané Laboratory, Avian and Rabbit Virology Immunology and Parasitology Unit, VIPAC, BP 53, 22440 Ploufragan, France.
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17
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Avian metapneumoviruses expressing Infectious Bronchitis virus genes are stable and induce protection. Vaccine 2013; 31:2565-71. [PMID: 23588091 PMCID: PMC7127184 DOI: 10.1016/j.vaccine.2013.03.055] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 02/14/2013] [Accepted: 03/28/2013] [Indexed: 11/24/2022]
Abstract
Foreign viral genes can be inserted into the AMPV genome. Resultant recombinant viruses express the inserted genes and are stable in cell culture. Both S1 and N genes from IBX QX induced protection against QX challenge. Induced seroconversion after recombinant inoculation was minimal.
The study investigates the ability of subtype A Avian metapneumovirus (AMPV) to accept foreign genes and be used as a vector for delivery of Infectious bronchitis virus (IBV) QX genes to chickens. Initially the GFP gene was added to AMPV at all gene junctions in conjunction with the development of cassetted full length DNA AMPV copies. After recombinant virus had been recovered by reverse genetics, GFP positions supporting gene expression while maintaining virus viability in vitro, were determined. Subsequently, either S1 or nucleocapsid (N) genes of IBV were positioned between AMPV M and F genes, while later a bivalent recombinant was prepared by inserting S1 and N at AMPV MF and GL junctions respectively. Immunofluorescent antibody staining showed that all recombinants expressed the inserted IBV genes in vitro and furthermore, all recombinant viruses were found to be highly stable during serial passage. Eyedrop inoculation of chickens with some AMPV-IBV recombinants at one-day-old induced protection against virulent IBV QX challenge 3 weeks later, as assessed by greater motility of tracheal cilia from chickens receiving the recombinants. Nonetheless evidence of AMPV/IBV seroconversion, or major recombinant tracheal replication, were largely absent.
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18
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Avian metapneumovirus RT-nested-PCR: A novel false positive reducing inactivated control virus with potential applications to other RNA viruses and real time methods. J Virol Methods 2012; 186:171-5. [DOI: 10.1016/j.jviromet.2012.07.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 05/16/2012] [Accepted: 07/09/2012] [Indexed: 11/23/2022]
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19
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Hu H, Roth JP, Estevez CN, Zsak L, Liu B, Yu Q. Generation and evaluation of a recombinant Newcastle disease virus expressing the glycoprotein (G) of avian metapneumovirus subgroup C as a bivalent vaccine in turkeys. Vaccine 2011; 29:8624-33. [DOI: 10.1016/j.vaccine.2011.09.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 08/19/2011] [Accepted: 09/02/2011] [Indexed: 11/15/2022]
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20
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Clubbe J, Naylor CJ. Avian metapneumovirus M2:2 protein inhibits replication in Vero cells: modification facilitates live vaccine development. Vaccine 2011; 29:9493-8. [PMID: 22019755 DOI: 10.1016/j.vaccine.2011.10.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Revised: 08/25/2011] [Accepted: 10/07/2011] [Indexed: 10/16/2022]
Abstract
Throughout the world, avian metapneumovirus (AMPV) infection of subtype A is principally controlled by two live vaccines both derived from UK field strain #8544. Improvements of those vaccines by use of reverse genetics technology was found to be hampered by the inability of #8544 to replicate in the commonly exploited Vero cell based reverse genetics system. A systematic reverse genetics based genome modification of a DNA copy of #8544, employing sequence data from a Vero grown, #8544 derived, live vaccine; was used to determine mutations required to facilitate virus recovery and replication in Vero cells. This identified a single coding substitution in the M2:2 reading frame as responsible. Furthermore, ablation of M2:2 was found to elicit the same outcome. M2:2 sequence analysis of seven AMPVs found Vero cell adaption to be associated with non similar amino acid changes in M2:2. The study shows that M2:2 modification of field virus #8544 will enable research leading to improved vaccines. This may have more general application to other AMPV field strains.
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Affiliation(s)
- Jayne Clubbe
- Department of Infection Biology, Faculty of Health and Life Sciences, University of Liverpool, Leahurst Campus, Neston, Cheshire CH64 7TE, United Kingdom
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21
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Deng Q, Weng Y, Lu W, Demers A, Song M, Wang D, Yu Q, Li F. Topology and cellular localization of the small hydrophobic protein of avian metapneumovirus. Virus Res 2011; 160:102-7. [PMID: 21683102 DOI: 10.1016/j.virusres.2011.05.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2011] [Revised: 05/24/2011] [Accepted: 05/25/2011] [Indexed: 01/05/2023]
Abstract
The small hydrophobic protein (SH) is a type II integral membrane protein that is packaged into virions and is only present in certain paramyxoviruses including metapneumovirus. In addition to a highly divergent primary sequence, SH proteins vary significantly in size amongst the different viruses. Human respiratory syncytial virus (HRSV) encodes the smallest SH protein consisting of only 64 amino acids, while metapneumoviruses have the longest SH protein ranging from 174 to 179 amino acids in length. Little is currently known about the cellular localization and topology of the metapneumovirus SH protein. Here we characterize for the first time metapneumovirus SH protein with respect to topology, subcellular localization, and transport using avian metapneumovirus subgroup C (AMPV-C) as a model system. We show that AMPV-C SH is an integral membrane protein with N(in)C(out) orientation located in both the plasma membrane as well as within intracellular compartments, which is similar to what has been described previously for SH proteins of other paramyxoviruses. Furthermore, we demonstrate that AMPV-C SH protein localizes in the endoplasmic reticulum (ER), Golgi, and cell surface, and is transported through ER-Golgi secretory pathway.
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Affiliation(s)
- Qiji Deng
- Department of Veterinary and Biomedical Sciences, South Dakota State University, Brookings, SD 57007, United States
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22
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Discrimination of mumps virus small hydrophobic gene deletion effects from gene translation effects on virus virulence. J Virol 2011; 85:6082-5. [PMID: 21471236 DOI: 10.1128/jvi.02686-10] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Deletion of the small hydrophobic (SH) protein of certain paramyxoviruses has been found to result in attenuation, suggesting that the SH protein is a virulence factor. To investigate the role of the mumps virus (MuV) SH protein in virulence, multiple stop codons were introduced into the open reading frame (ORF) of a MuV molecular clone (r88-1961(SHstop)), preserving genome structure but precluding production of the SH protein. No differences in neurovirulence were seen between the wild-type and the SH(stop) viruses. In contrast, upon deletion of the SH gene, significant neuroattenuation was observed. These data indicate that the MuV SH protein is not a neurovirulence factor and highlight the importance of distinguishing gene deletion effects from protein-specific effects.
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23
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Deletion of the M2-2 gene from avian metapneumovirus subgroup C impairs virus replication and immunogenicity in Turkeys. Virus Genes 2011; 42:339-46. [DOI: 10.1007/s11262-011-0577-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2010] [Accepted: 01/17/2011] [Indexed: 10/18/2022]
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Charged amino acids in the AMPV fusion protein have more influence on induced protection than deletion of the SH or G genes. Vaccine 2010; 28:6800-7. [DOI: 10.1016/j.vaccine.2010.07.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Revised: 06/08/2010] [Accepted: 07/07/2010] [Indexed: 11/22/2022]
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25
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Sugiyama M, Ito H, Hata Y, Ono E, Ito T. Complete nucleotide sequences of avian metapneumovirus subtype B genome. Virus Genes 2010; 41:389-95. [PMID: 20676749 DOI: 10.1007/s11262-010-0518-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2010] [Accepted: 07/16/2010] [Indexed: 11/24/2022]
Abstract
Complete nucleotide sequences were determined for subtype B avian metapneumovirus (aMPV), the attenuated vaccine strain VCO3/50 and its parental pathogenic strain VCO3/60616. The genomes of both strains comprised 13,508 nucleotides (nt), with a 42-nt leader at the 3'-end and a 46-nt trailer at the 5'-end. The genome contains eight genes in the order 3'-N-P-M-F-M2-SH-G-L-5', which is the same order shown in the other metapneumoviruses. The genes are flanked on either side by conserved transcriptional start and stop signals and have intergenic sequences varying in length from 1 to 88 nt. Comparison of nt and predicted amino acid (aa) sequences of VCO3/60616 with those of other metapneumoviruses revealed higher homology with aMPV subtype A virus than with other metapneumoviruses. A total of 18 nt and 10 deduced aa differences were seen between the strains, and one or a combination of several differences could be associated with attenuation of VCO3/50.
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Affiliation(s)
- Miki Sugiyama
- Research and Development, Merial Japan Limited, 2-14-2 Nagata-cho, Chiyoda-ku, Tokyo, Japan
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26
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Abstract
The use of vaccines is the main approach to control of the economically important poultry viral respiratory diseases infectious laryngotracheitis (ILT), avian metapneumovirus (aMPV) infections and infectious bronchitis (IB). This paper appraises the current methods of vaccine control in the light of the nature of each virus and epidemiological factors associated with each disease. Infectious laryngotracheitis virus (ILTV) exists as a single type with a wide range of disease severity. It is a serious disease in certain regions of the world. Recent work has distinguished molecular differences between vaccine and field strains and vaccine virus can be a cause of disease. Vaccines have remained unaltered for many years but new ones are being developed to counter vaccine side effects and reversion and reactivation of latent virus. Avian metapneumoviruses, the cause of turkey rhinotracheitis and respiratory disease in chickens exists as 4 subtypes, A, B, C and D. A and B are widespread and vaccines work well provided that accurate doses are given. Newer vaccine developments are designed to eliminate reversion and possibly counter the appearance of newer field strains which may break through established vaccine coverage. IB presents the biggest problem of the three. Being an unstable RNA virus, part of the viral genome that codes for the S1 spike gene can undergo mutation and recombination so that important antigenic variants can appear irregularly which may evade existing vaccine protection. While conventional vaccines work well against homologous types, new strategies are needed to counter this instability. Molecular approaches involving tailoring viruses to suit field challenges are in progress. However, the simple use of two genetically different vaccines to protect against a wide range of heterologous types is now a widespread practice that is very effective. None of the three diseases described can claim to be satisfactorily controlled and it remains to be seen whether the newer generations of vaccines will be more efficacious and cost effective. The importance of constant surveillance is emphasised and the testing of novel vaccines cannot be achieved without the use of vaccine-challenge experiments in poultry.
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Affiliation(s)
- Richard C Jones
- School of Veterinary Science, University of Liverpool, Neston, South Wirral, England, UK.
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27
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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: 3.2] [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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Catelli E, Lupini C, Cecchinato M, Ricchizzi E, Brown P, Naylor CJ. Field avian Metapneumovirus evolution avoiding vaccine induced immunity. Vaccine 2010; 28:916-21. [DOI: 10.1016/j.vaccine.2009.10.149] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2009] [Revised: 10/22/2009] [Accepted: 10/30/2009] [Indexed: 11/16/2022]
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