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Thontiravong A, Wannaratana S, Sasipreeyajan J. Genetic characterization of reticuloendotheliosis virus in chickens in Thailand. Poult Sci 2019; 98:2432-2438. [PMID: 30668827 DOI: 10.3382/ps/pez025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 01/09/2019] [Indexed: 11/20/2022] Open
Abstract
Reticuloendotheliosis virus (REV) causes an immunosuppressive, runting, and oncogenic disease in poultry, posing a significant threat to the poultry industry. In Thailand, an unidentified disease associated with runting-stunting syndrome and neoplasia, resembling REV infection, has been continuously observed in several chicken farms. However, REV infection in Thailand has never been reported. In this study, we investigated the occurrence and genetic characteristics of REVs in chickens in Thailand from 2013 to 2016. Of the 130 clinical samples obtained from 29 chicken farms from 9 provinces located in the major chicken-raising regions of Thailand, including the central, eastern, northern, and northeastern parts of Thailand, 51 samples (39.23%) and 21 farms (72.41%) were REV-positive. REV-positive samples were detected in all 9 provinces tested. Our results demonstrated that REV was extensively distributed in the major chicken-raising regions of Thailand. Phylogenetic analysis of the whole genome sequence showed that Thai REV was most closely related to Chinese, Taiwanese, and the US REV strains isolated from different avian species and clustered into REV subtype III. This finding indicates that REV subtype III was predominantly circulated in Thai chicken flocks. This study is the first report on REV infection in chickens in Thailand. Our findings raise the awareness of REV as another causative agent of runting and oncogenic disease in chickens in Thailand and highlight the wide distribution of REV infection among chickens worldwide.
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Affiliation(s)
- Aunyaratana Thontiravong
- Department of Veterinary Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand.,Center of Excellence for Emerging and Re-emerging Infectious Diseases in Animals (CUEIDAs), Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Suwarak Wannaratana
- Faculty of Veterinary Medicine, Rajamangala University of Technology Tawan-Ok, Chonburi 20110, Thailand
| | - Jiroj Sasipreeyajan
- Avian Health Research Unit, Department of Veterinary Medicine, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
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Chen S, Miao B, Zhang H, Xiong Y, Zhang X, Shao T, He J, Du Q, Huang Y, Tong D. Construction and characterization of the infectious clone of porcine parvovirus carrying genetic marker. Vet Microbiol 2019; 235:143-150. [PMID: 31282372 DOI: 10.1016/j.vetmic.2019.06.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 06/02/2019] [Accepted: 06/16/2019] [Indexed: 12/31/2022]
Abstract
Porcine parvovirus (PPV) is one of the major pathogens that bring about reproductive failure of pregnant sows. However, the study of the pathogenesis mechanism is circumscribed due to the lack of efficient genetic manipulation method. Infectious clone is a powerful tool for further studying the genetic mechanisms of PPV. In the present study, the gene fragment (157-4812) of PPV was amplified by PPV China isolate strain as a template, and PPV DNA fragments (1-182) forming Y-structure within in 5' end and (4788-5074) forming U-structure in 3' end were synthesized. And then, the above three fragments were inserted into plasmid pKQLL to congregate a PPV full-length recombinant plasmid by means of In-Fusion cloning technology. After the successful sequencing identification of the recombinant plasmid, the EcoR I restriction site was brought out as a genetic marker by nonsense mutation (A3058 T) to produce plasmid Y-PPV, which was transfected into PK-15 cells for rescue of virus. The rescued viral particles were observed under transmission electron microscopy, and the sequencing analysis showed that Y-PPV could stably carry the genetic marker. It could be seen that Y-PPV has similar replicate capability and pathogenicity as the wild-type parental PPV strain by cellular and animal experiments. These results confirmed that Y-PPV maintain similar biological characteristics with wild-type parental PPV strain. Infectious clone could be a valuable tool for studying the individual genes of PPV and applications in gene deletion or live vector vaccines.
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Affiliation(s)
- Songbiao Chen
- College of Veterinary Medicine, Northwest A&F University, YL, China
| | - Bichen Miao
- College of Veterinary Medicine, Northwest A&F University, YL, China
| | - Huan Zhang
- College of Life Science, Northwest A&F University, YL, China
| | - Yingli Xiong
- College of Veterinary Medicine, Northwest A&F University, YL, China
| | - Xiujuan Zhang
- College of Veterinary Medicine, Northwest A&F University, YL, China
| | - Ting Shao
- College of Veterinary Medicine, Northwest A&F University, YL, China
| | - Jia He
- College of Veterinary Medicine, Northwest A&F University, YL, China
| | - Qian Du
- College of Veterinary Medicine, Northwest A&F University, YL, China
| | - Yong Huang
- College of Veterinary Medicine, Northwest A&F University, YL, China.
| | - Dewen Tong
- College of Veterinary Medicine, Northwest A&F University, YL, China.
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Gao C, Zhai J, Dang S, Zheng S. Analysis of alternative splicing in chicken embryo fibroblasts in response to reticuloendotheliosis virus infection. Avian Pathol 2018; 47:585-594. [DOI: 10.1080/03079457.2018.1511047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Chang Gao
- Laboratory Pathological Physiology, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People’s Republic of China
| | - Jie Zhai
- Laboratory Pathological Physiology, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People’s Republic of China
| | - Shengyuan Dang
- Laboratory Pathological Physiology, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People’s Republic of China
| | - Shimin Zheng
- Laboratory Pathological Physiology, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People’s Republic of China
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Immunoprotection induced by CpG-ODN/Poly(I:C) combined with recombinant gp90 protein in chickens against reticuloendotheliosis virus infection. Antiviral Res 2017; 147:1-10. [PMID: 28465147 DOI: 10.1016/j.antiviral.2017.04.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 04/11/2017] [Accepted: 04/28/2017] [Indexed: 11/20/2022]
Abstract
The present study is focused on investigating the immunoprotective effects of CpG-ODN/Poly(I:C) combined with the viral glycoprotein gp90 protein against reticuloendotheliosis virus (REV) infection in chickens. REV's gp90 gene was amplified from the REV-infected cells and expressed in Escherichia coli (E.coli). The expressed products, upon purification, were inoculated into 7-day-old chickens with PBS, CpG-ODN or Poly(I:C) adjuvant; Two booster inoculations were then conducted, and then each chicken was challenged. The presence of REV-antibodies in serum was determined weekly after the first vaccination. The viremia and immunosuppressive effects of REV infection were also monitored after the challenge. The neutralizing effects of the antisera were tested in vitro. The results showed that the recombinant gene containing REV gp90 gene was expressed into the recombinant protein with a size of 51 Kilo Dalton (KD), which could be recognized by a monoclonal antibody (MAb) against the gp90 protein. The viremia and immunosuppressive effects of avian influenza virus (AIV) vaccine caused by REV challenge in CpG-ODN group and in Poly(I:C) group were dramatically decreased. REV antibody with low titers was induced in gp90 group and the inoculated chickens were partly protected. Compared with those in gp90 group, the titers and the positive ratios of REV antibody in CpG+gp90 group were significantly increased, whereas the viremia and immunosuppressive effects of AIV vaccine caused by REV infection were significantly decreased. In the Poly(I:C) +gp90 group, the viremia and immunosuppressive effects caused by REV infection were also dramatically decreased, although REV antibody responses were softly increased. The diluted antisera from the vaccinated chickens in both groups could completely inhibit the replication of REV in chick fibroblast cells (CEF). Hence, it can be concluded that CpG-ODN or the Poly(I:C) adjuvant can enhance the antiviral effects of the REV subunit vaccine against REV infection, which may result from different mechanisms.
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Emergence of reticuloendotheliosis virus in pigeons in Guangdong Province, Southern China. Arch Virol 2016; 161:2007-11. [DOI: 10.1007/s00705-016-2870-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 04/20/2016] [Indexed: 11/26/2022]
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Deng X, Hu F, Qi X, Gao L, Li K, Gao H, Gao Y, Wang Y, Shen N, Hua Y, Wang X. Construction and characterization of a recombinant reticuloendotheliosis virus expressing enhanced green fluorescent protein. Arch Virol 2015; 160:2231-5. [DOI: 10.1007/s00705-015-2502-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Accepted: 06/15/2015] [Indexed: 11/29/2022]
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Hu F, Zhao Y, Qi X, Cui H, Gao Y, Gao H, Liu C, Wang Y, Zhang Y, Li K, Wang X, Wang Y. Soluble expression and enzymatic activity evaluation of protease from reticuloendotheliosis virus. Protein Expr Purif 2015; 114:64-70. [PMID: 26102339 DOI: 10.1016/j.pep.2015.06.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 05/11/2015] [Accepted: 06/17/2015] [Indexed: 11/26/2022]
Abstract
The protease (PR) encoded by most retroviruses is deeply involved in the lifecycle and infection process of retroviruses by possessing the specificity necessary to correctly cleave the viral polyproteins and host cell proteins. However, as an important representative of avian retroviruses, the enzymatic properties of PR from reticuloendotheliosis virus (REV) have not been clearly documented. The recombinant PR, its mutant fused with a His-tag, and its substrate p18-p30 fused with a GST-tag were expressed in the Escherichia coli system as soluble enzymes. The soluble PR and p18-p30 were purified using Ni-NTA His Bind Resin and Glutathione Sepharose 4B, respectively. The enzymatic activity of PR was analyzed using the substrate of p18-p30. The expressed prokaryotic protease has enzyme activity that is dependent on such conditions as temperature, pH, and ions, and its activity can be inhibited by caspase inhibitor and the divalent metal ions Ca(2+) and Ni(2+). In addition, the key role of the residue Thr (amino acids 28) for the enzymatic activity of PR was identified. Furthermore, the caspase inhibitor Z-VAD-FMK was confirmed to inhibit the PR enzymatic activity of REV. For the first time, the PR of REV was expressed in the soluble form, and the optimal enzymatic reaction system in vitro was developed and preliminarily used. This study provides essential tools and information for further understanding the infection mechanism of REV and for the development of antiviral drugs treating retroviruses.
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Affiliation(s)
- Feng Hu
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150001, China.
| | - Yan Zhao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150001, 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 150001, 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 150001, 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 150001, China.
| | - Honglei Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150001, 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 150001, 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 150001, 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 150001, 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 150001, 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 150001, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou 225009, China.
| | - Yunfeng Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150001, China; National Engineering Research Center of Veterinary Biologics, Harbin, China.
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Ji X, Wang Q, Li X, Qi X, Wang Y, Gao H, Gao Y, Wang X. A 19-nucleotide insertion in the leader sequence of avian leukosis virus subgroup J contributes to its replication in vitro but is not related to its pathogenicity in vivo. PLoS One 2014; 9:e84797. [PMID: 24465434 PMCID: PMC3896346 DOI: 10.1371/journal.pone.0084797] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Accepted: 11/25/2013] [Indexed: 01/09/2023] Open
Abstract
Subgroup J avian leukosis virus (ALV-J) was first isolated from meat-type chickens that had developed myeloid leukosis and since 2008, ALV-J infections in chickens have become widespread in China. A comparison of the sequence of ALV-J epidemic isolates with HPRS-103, the ALV-J prototype virus, revealed several distinct features, one of which is a 19-nucleotide (nt) insertion in the leader sequence. To determine the role of the 19-nt insertion in ALV-J pathogenicity, a pair of viruses were constructed and rescued. The first virus was an ALV-J Chinese isolate (designated rSD1009) containing the 19-nt insertion in its leader sequence. The second virus was a clone, in which the leader sequence had a deleted 19-nt sequence (designated rSD1009△19). Compared with rSD1009△19, rSD1009 displayed a moderate growth advantage in vitro. However, no differences were demonstrated in either viral replication or oncogenicity between the two rescued viruses in chickens. These results indicated that the 19-nt insertion contributed to ALV-J replication in vitro but was not related to its pathogenicity in vivo.
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Affiliation(s)
- Xiaolin Ji
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Qi Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Xiaofei Li
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Xiaole Qi
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yongqiang Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Honglei Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yulong Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
- * E-mail: ;
| | - Xiaomei Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
- * E-mail: ;
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Wang Q, Ji X, Gao Y, Qi X, Wang X, Wang Y, Qin L, Gao H, Wang X. Overexpression of microRNA gga-miR-1650 decreases the replication of avian leukosis virus subgroup J in infected cells. J Gen Virol 2013; 94:2287-2296. [PMID: 23907393 DOI: 10.1099/vir.0.054007-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
MicroRNAs (miRNAs) are a class of small regulatory non-coding RNAs that modulate gene expression at the post-transcriptional level, playing a crucial role in cell differentiation and development. Recently, some reports have demonstrated that a number of cellular miRNAs play a role during viral infection. In this study, a luciferase-reporter system carrying the 5' untranslated region (5' UTR) and 3' UTR of avian leukosis virus subgroup J (ALV-J) was used to determine whether cellular miRNAs are involved in ALV-J infection. The miRNA gga-miR-1650 was screened for its potential interaction with the 5' UTR of ALV-J and the ability to suppress luciferase-reporter activity. A mutational analysis of predicted gga-miR-1650-binding sites showed that the 5' and 3' ends of gga-miR-1650 contributed to the interaction between gga-miR-1650 and its target located at the 5' UTR. Overexpression of miRNA gga-miR-1650 was shown to downregulate the expression of the Gag protein and influence the replication of ALV-J through binding to the 5' UTR. Overall, this report provides the basis for the development of new strategies for anti-ALV-J intervention.
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Affiliation(s)
- Qi Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, PR China
| | - Xiaolin Ji
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, PR China
| | - Yulong Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, PR China
| | - Xiaole Qi
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, PR China
| | - Xiaojun Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, PR China
| | - Yongqiang Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, PR China
| | - Liting Qin
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, PR China
| | - Honglei Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, PR China
| | - Xiaomei Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, PR China
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