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Li H, Tan M, Zhang F, Ji H, Zeng Y, Yang Q, Tan J, Huang J, Su Q, Huang Y, Kang Z. Diversity of Avian leukosis virus subgroup J in local chickens, Jiangxi, China. Sci Rep 2021; 11:4797. [PMID: 33637946 PMCID: PMC7910287 DOI: 10.1038/s41598-021-84189-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 02/12/2021] [Indexed: 12/02/2022] Open
Abstract
Avian leukosis caused by avian leukosis virus (ALV) is one of the most severe diseases endangering the poultry industry. When the eradication measures performed in commercial broilers and layers have achieved excellent results, ALV in some local chickens has gradually attracted attention. Since late 2018, following the re-outbreak of ALV-J in white feather broilers in China, AL-like symptoms also suddenly broke out in some local flocks, leading to great economic losses. In this study, a systematic epidemiological survey was carried out in eight local chicken flocks in Jiangxi Province, China, and 71 strains were finally isolated from 560 samples, with the env sequences of them being successfully sequenced. All of those new isolates belong to subgroup J but they have different molecular features and were very different from the strains that emerged in white feature broilers recently, with some strains being highly consistent with those previously isolated from commercial broilers, layers and other flocks or even isolated from USA and Russian, suggesting these local chickens have been acted as reservoirs to accumulate various ALV-J strains for a long time. More seriously, phylogenetic analysis shows that there were also many novel strains emerging and in a separate evolutionary branch, indicating several new mutated ALVs are being bred in local chickens. Besides, ALV-J strains isolated in this study can be further divided into ten groups, while there were more or fewer groups in different chickens, revealing that ALV may cross propagate in those flocks. The above analyses explain the complex background and future evolution trend of ALV-J in Chinese local chickens, providing theoretical support for the establishment of corresponding prevention and control measures.
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Affiliation(s)
- Haiqin Li
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, 330200, Jiangxi, China
| | - Meifang Tan
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, 330200, Jiangxi, China
| | - Fanfan Zhang
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, 330200, Jiangxi, China
| | - Huayuan Ji
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, 330200, Jiangxi, China
| | - Yanbing Zeng
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, 330200, Jiangxi, China
| | - Qun Yang
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, 330200, Jiangxi, China
| | - Jia Tan
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, 330200, Jiangxi, China
| | - Jiangnan Huang
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, 330200, Jiangxi, China
| | - Qi Su
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an, 271000, Shandong, China
| | - Yu Huang
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, Fujian, China.
| | - Zhaofeng Kang
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, 330200, Jiangxi, China.
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Zhou JR, Liu JH, Li HM, Zhao Y, Cheng Z, Hou YM, Guo HJ. Regulatory effects of chicken TRIM25 on the replication of ALV-A and the MDA5-mediated type I interferon response. Vet Res 2020; 51:145. [PMID: 33298177 PMCID: PMC7724733 DOI: 10.1186/s13567-020-00870-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 11/19/2020] [Indexed: 12/20/2022] Open
Abstract
This study focuses on the immunoregulatory effects of chicken TRIM25 on the replication of subgroup A of avian leukosis virus (ALV-A) and the MDA5-mediated type I interferon response. The ALV-A-SDAU09C1 strain was inoculated into DF1 cells and 1-day-old SPF chickens, and the expression of TRIM25 was detected at different time points after inoculation. A recombinant overexpression plasmid containing the chicken TRIM25 gene (TRIM25-GFP) was constructed and transfected into DF1 cells to analyse the effects of the overexpression of chicken TRIM25 on the replication of ALV-A and the expression of MDA5, MAVS and IFN-β. A small interfering RNA targeting chicken TRIM25 (TRIM25-siRNA) was prepared and transfected into DF1 cells to assess the effects of the knockdown of chicken TRIM25 on the replication of ALV-A and the expression of MDA5, MAVS and IFN-β. The results showed that chicken TRIM25 was significantly upregulated at all time points both in ALV-A-infected cells and in ALV-A-infected chickens. Overexpression of chicken TRIM25 in DF1 cells dramatically decreased the antigenic titres of ALV-A in the cell supernatant and upregulated the relative expression of MDA5, MAVS and IFN-β induced by ALV-A or by poly(I:C); in contrast, knockdown of chicken TRIM25 significantly increased the antigenic titres of ALV-A and downregulated the relative expression of MDA5, MAVS and IFN-β. It can be concluded that chicken TRIM25 can inhibit the replication of ALV-A and upregulate the MDA5 receptor-mediated type I interferon response in chickens. This study can help improve the understanding of the antiviral activities of chicken TRIM25 and enrich the knowledge of antiviral responses in chickens.
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Affiliation(s)
- Jin-Run Zhou
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, China.,College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, 271018, China
| | - Jun-Hong Liu
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, China.,College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, 271018, China
| | - Hong-Mei Li
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, China.,College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, 271018, China
| | - Yue Zhao
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, China.,College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, 271018, China
| | - Ziqiang Cheng
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, China.,College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, 271018, China
| | - Yan-Meng Hou
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, China.,College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, 271018, China
| | - Hui-Jun Guo
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Tai'an, 271018, China. .,College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, 271018, China.
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Wang P, Niu J, Xue C, Han Z, Abdelazez A, Xinglin Z. Two novel recombinant avian leukosis virus isolates from Luxi gamecock chickens. Arch Virol 2020; 165:2877-2881. [PMID: 32885326 DOI: 10.1007/s00705-020-04799-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 08/07/2020] [Indexed: 11/24/2022]
Abstract
Avian leukosis virus (ALV) is associated with immune suppression, neoplasia, and reduced performance in chickens. In this study, two strains of ALV were isolated from Luxi gamecocks by DF-1 cell culture and identified by PCR, immunofluorescence assay, and sequencing of the viral genome. These strains were found to be novel recombinant viruses with nucleotide sequence identity of over 93.0% in the LTR and 94.4% in U3 to ALV-J, over 95.0% in the 5'UTR to ALV-C, over 93.4% in gp85 to ALV-B, and over 96.0% in gp37 to ALV-E. These results indicate that these two isolates are recombinants between ALV-J, ALV-C, ALV-E and ALV-B.
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Affiliation(s)
- Peikun Wang
- Institute of Microbe and Host Health, Linyi University, Linyi, 276005, Shandong, China.
| | - Jianrui Niu
- Institute of Microbe and Host Health, Linyi University, Linyi, 276005, Shandong, China
| | - Cong Xue
- Institute of Microbe and Host Health, Linyi University, Linyi, 276005, Shandong, China
| | - Zhaoqing Han
- Institute of Microbe and Host Health, Linyi University, Linyi, 276005, Shandong, China
| | - Amro Abdelazez
- Institute of Microbe and Host Health, Linyi University, Linyi, 276005, Shandong, China
| | - Zhang Xinglin
- Institute of Microbe and Host Health, Linyi University, Linyi, 276005, Shandong, China.
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Awan FM, Yang BB, Naz A, Hanif A, Ikram A, Obaid A, Malik A, Janjua HA, Ali A, Sharif S. The emerging role and significance of circular RNAs in viral infections and antiviral immune responses: possible implication as theranostic agents. RNA Biol 2020; 18:1-15. [PMID: 32615049 DOI: 10.1080/15476286.2020.1790198] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Circular RNAs (circRNAs) are ubiquitously expressed, covalently closed rings, produced by pre-mRNA splicing in a reversed order during post-transcriptional processing. Circularity endows 3'-5'-linked circRNAs with stability and resistance to exonucleolytic degradation which raises the question whether circRNAs may be relevant as potential therapeutic targets or agents. High stability in biological systems is the most remarkable property and a major criterion for why circRNAs could be exploited for a range of RNA-centred medical applications. Even though various biological roles and regulatory functions of circRNAs have been reported, their in-depth study is challenging because of their circular structure and sequence-overlap with linear mRNA counterparts. Moreover, little is known about their role in viral infections and in antiviral immune responses. We believe that an in-depth and detailed understanding of circRNA mediated viral protein regulations will increase our knowledge of the biology of these novel molecules. In this review, we aimed to provide a comprehensive basis and overview on the biogenesis, significance and regulatory roles of circRNAs in the context of antiviral immune responses and viral infections including hepatitis C virus infection, hepatitis B virus infection, hepatitis delta virus infection, influenza A virus infection, Epstein-Barr virus infection, kaposi's sarcoma herpesvirus infection, human cytomegalovirus infection, herpes simplex virus infection, human immunodeficiency virus infection, porcine epidemic diarrhoea virus infection, ORF virus infection, avian leukosis virus infection, simian vacuolating virus 40 infection, transmissible gastroenteritis coronavirus infection, and bovine viral diarrhoea virus infection. We have also discussed the critical regulatory role of circRNAs in provoking antiviral immunity, providing evidence for implications as therapeutic agents and as diagnostic markers.
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Affiliation(s)
- Faryal Mehwish Awan
- Institute of Molecular Biology and Biotechnology (IMBB), the University of Lahore (UOL) , Lahore, Pakistan
| | - Burton B Yang
- Sunnybrook Research Institute, Sunnybrook Health Sciences Centre , Toronto, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto , Toronto, Canada.,Institute of Medical Sciences, University of Toronto , Toronto, Canada
| | - Anam Naz
- Institute of Molecular Biology and Biotechnology (IMBB), the University of Lahore (UOL) , Lahore, Pakistan
| | - Aneeqa Hanif
- Institute of Molecular Biology and Biotechnology (IMBB), the University of Lahore (UOL) , Lahore, Pakistan
| | - Aqsa Ikram
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST) , Pakistan
| | - Ayesha Obaid
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST) , Pakistan
| | - Arif Malik
- Institute of Molecular Biology and Biotechnology (IMBB), the University of Lahore (UOL) , Lahore, Pakistan
| | - Hussnain Ahmed Janjua
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST) , Pakistan
| | - Amjad Ali
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST) , Pakistan
| | - Sumaira Sharif
- Institute of Molecular Biology and Biotechnology (IMBB), the University of Lahore (UOL) , Lahore, Pakistan
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Mao Y, Su Q, Li J, Jiang T, Wang Y. Avian leukosis virus contamination in live vaccines: A retrospective investigation in China. Vet Microbiol 2020; 246:108712. [PMID: 32605749 DOI: 10.1016/j.vetmic.2020.108712] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/24/2020] [Accepted: 05/04/2020] [Indexed: 12/19/2022]
Abstract
Avian leukosis (AL) is one of the most pandemic immunosuppressive diseases and has been widely spread between 2006 and 2009 in China. The contamination of avian leukosis virus (ALV) in attenuated vaccine is considered as one of the possible transmission routes of this disease. Based on a retrospective survey of 918 batches of attenuated vaccine produced before 2010, three of them were identified as ALV-positive and corresponding ALV strains were successfully isolated from a live Fowlpox virus vaccine, a live Newcastle disease virus vaccine and a live Infectious Bursal Disease virus vaccine, respectively, and whole-genome sequencing showed that these three isolates shared the highest homology with ALV-A wild strains isolated in China (97.7%) over the same period, and the phylogenetic analysis based on their gp85 genes further confirmed that they belong to subgroup A. Meanwhile, although these three ALV-A strains isolated from contaminated vaccines shared a close genetic relationship, their U3 region of genome have a relatively low identity, suggesting that these three strains may have different sources. This study reminds us once again that the possibility of ALV infecting chickens through contaminated live vaccines, requiring us to carry out stricter exogenous virus monitoring in vaccines.
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Affiliation(s)
- Yaqing Mao
- China Institute of Veterinary Drug Control, Beijing 100081, China
| | - Qi Su
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Junping Li
- China Institute of Veterinary Drug Control, Beijing 100081, China.
| | - Taozhen Jiang
- China Institute of Veterinary Drug Control, Beijing 100081, China.
| | - Yixin Wang
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, Shandong, China.
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Zeng Y, Gong Z, Wu B, Guan W, Yu S, An Y, Lu R, Zhao J, Wu Y, Huang Y, Wu X. A novel Bursin-like peptide as a potential virus inhibitor and immunity regulator in SPF chickens infected with recombinant ALV. BMC Vet Res 2019; 15:447. [PMID: 31823780 PMCID: PMC6902579 DOI: 10.1186/s12917-019-2192-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 11/25/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Avian leukosis viruses (ALVs) are important contagious suppressive factors of chicken immunity and growth performance, resulted in enormous economic loss. Although virus eradication programs are applied in breeder flocks, ALVs are still widespread globally. Therefore, other valuable adjunct to reduce the negative effect of ALVs should be considered. Bursin-like peptide (BLP) showed remarkable immunomodulatory effects, whereas their influence on ALV-infected avian groups has not been reported. Here, a designed hybrid BLP was expressed in E. coli. The purified BLP was injected subcutaneously weekly in SPF chickens congenitally infected with a natural ALV strain. Then the influences of this BLP on the growth performance, immune response and virus titer of ALV-infected chickens were determined. RESULTS This BLP injection significantly improved the body weights of ALV-infected birds (P < 0.05). BLP injection significantly enhanced organ index in the BF in ALV-infected birds (P < 0.05). The weekly injection of BLP significantly lengthened the maintenance time of antibodies against Newcastle disease virus (NDV) attenuated vaccine of ALV-infected birds (P < 0.05) and boosted the antibody titer against avian influenza virus (AIV) H5 inactive vaccine of mock chicken (P < 0.05). BLP injection in mock chickens enhanced the levels of serum cytokines (IL-2, IL-4 and interferon-γ) (P < 0.05). Surprisingly, the novel BLP significantly inhibited expression of the ALV gp85 gene in the thymus (P < 0.05), kidney (P < 0.05) and bursa of Fabricius (BF) (P < 0.01) of ALV-infected chickens. Both viral RNA copy number and protein level decreased significantly with BLP (50 μg/mL) inoculation before ALV infection in DF1 cells (P < 0.05). CONCLUSIONS This is the first report investigating the influence of BLP on the growth and immunity performance of chickens infected by ALV. It also is the first report about the antiviral effect of BLP in vivo and in vitro. This BLP expressed in E. coli showed potential as a vaccine adjuvant, growth regulator and antiretroviral drug in chickens to decrease the negative effects of ALV infection.
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Affiliation(s)
- Yukun Zeng
- College of Animal Science, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China.,Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China.,School of Basic Medical Sciences, Fujian Medical University, Fuzhou, 350004, People's Republic of China
| | - Zuxin Gong
- College of Animal Science, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China.,Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Binbin Wu
- College of Animal Science, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China.,Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Wenchao Guan
- College of Animal Science, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China.,Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Shenyi Yu
- School of Basic Medical Sciences, Fujian Medical University, Fuzhou, 350004, People's Republic of China
| | - Yajuan An
- College of Animal Science, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China.,Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Rongbin Lu
- College of Animal Science, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China.,Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Jinrong Zhao
- College of Animal Science, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China.,Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Yijian Wu
- College of Animal Science, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China.,Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Yifan Huang
- College of Animal Science, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China.,Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Xiaoping Wu
- College of Animal Science, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China. .,Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agricultural and Forestry University, Fuzhou, 350002, People's Republic of China.
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Wang P, Shi M, He C, Lin L, Li H, Gu Z, Li M, Gao Y, Huang T, Mo M, Wei T, Wei P. A novel recombinant avian leukosis virus isolated from gamecocks induced pathogenicity in Three-Yellow chickens: a potential infection source of avian leukosis virus to the commercial chickens. Poult Sci 2019; 98:6497-6504. [PMID: 31549168 PMCID: PMC6870561 DOI: 10.3382/ps/pez548] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 09/10/2019] [Indexed: 01/06/2023] Open
Abstract
One natural recombinant avian leukosis virus (ALV) strain GX14DJ3-18 was isolated from a native gamecock by DF-1 cell culture and identified with Polymerase Chain Reaction (PCR), immunofluorescence assay and the viral genome's nucleotide sequencing. This strain was revealed as a novel recombinant virus with nucleotide sequence similarities of 95.4% Long Terminal Repeated (LTR), 95.8% 5', UTR, 97.9% gag, and 92.9% 3'untranslated regions (UTR) in ALV-J. Also we found sequence similarities of 99.3% pol and 99.0% gp37 in ALV-E, and 89.9% gp85 in ALV-A. The simulated congenital infection with GX14DJ3-18 in Three-Yellow chickens exhibited a significant negative effect on the development of immune organs (P < 0.05). Also, lower antibody responses were found to vaccinations with the commercial vaccines of Newcastle disease virus and with subtypes H5 and H9 of avian influenza virus (P < 0.05). The incidence of tumor or tumor-like lesions in the challenged birds was 14.28% (5/35), while none were observed in the un-challenged control group (0/35). These results suggested that GX14DJ3-18 is a novel recombinant ALV that can induce pathogenicity in the commercial Three-Yellow chickens. We speculated that cross-provincial sales of gamecocks in which ALVs have not been eradicated thoroughly might be a potential route for the transmission of ALVs to commercial chickens.
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Affiliation(s)
- Peikun Wang
- Institute for Poultry Science qand Health, Guangxi University, Nanning, Guangxi 530004, China
- College of Life Science, Linyi University, Linyi, Shandong 276000, China
| | - Mengya Shi
- Institute for Poultry Science qand Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Chengwei He
- Pingxiang Customs P. R. China, Pingxiang, Guangxi 532600, China
| | - Lulu Lin
- Institute for Poultry Science qand Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Haijuan Li
- Institute for Poultry Science qand Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Zhanming Gu
- Institute for Poultry Science qand Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Min Li
- Institute for Poultry Science qand Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Yanli Gao
- Institute for Poultry Science qand Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Teng Huang
- Institute for Poultry Science qand Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Meilan Mo
- Institute for Poultry Science qand Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Tianchao Wei
- Institute for Poultry Science qand Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Ping Wei
- Institute for Poultry Science qand Health, Guangxi University, Nanning, Guangxi 530004, China
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8
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Gao X, Li Q, Fang L, Song H, Cui Z, Meng F, Zhang Z. The follicle promotes the evolution of variants of avian leukosis virus subgroup J in vertical transmission. Biochem Biophys Res Commun 2019; 521:1089-1094. [PMID: 31733830 DOI: 10.1016/j.bbrc.2019.11.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 11/05/2019] [Indexed: 11/17/2022]
Abstract
Avian leukosis virus (ALV) is one of the main causative agent of tumor development, which brings enormous economic losses to the poultry industry worldwide. ALV can be transmitted horizontally and vertically, and the latter often give rise to more adverse pathogenicity. However, the propagation and evolution of ALV underlying vertical transmission remain not-well understood. Herein, an animal model for the evolution of variants of ALV subgroup J (ALV-J) in the vertical transmission was built and different organs from infected hens and plasma from their ALV-positive progenies were collected, and then three segments in the hypervariable regions of ALV (gp85-A, gp85-B, LTR-C) were amplified and sequenced using conventional Sanger sequencing and MiSeq high-throughput sequencing, respectively. The results showed that the genomic diversity of ALV-J occurred in different organs from ALV-J infected hen, and that the dominant variants in different organs of parental hens, especially in follicle, changed significantly compared with original inoculum strain. Notably, the dominant variants in progenies exhibited higher homologies with variants in parental hens' follicle (88.9%-98.9%) than other organs (85.6%-91.1%), and most consistent mutations in the variants were observed between the progenies and parental hen's follicle. Furthermore, HyPhy analysis indicated that the global selection pressure value (ω) in the follicle is significantly higher than those in other organs. In summary, an animal model for vertical transmission was built and our findings revealed the evolution of variants of ALV in the process of vertical transmission, moreover, the variants were most likely to be taken to the next generation via follicle, which may be related to the higher selection pressure follicle underwent.
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Affiliation(s)
- Xintao Gao
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, China; Institute of Animal Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100193, China
| | - Qiuchen Li
- College of Veterinary Medicine, China Agricultural University, Beijing, 100094, China
| | - Lichun Fang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100193, China
| | - Haozhi Song
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, China
| | - Zhizhong Cui
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Fanfeng Meng
- College of Veterinary Medicine, China Agricultural University, Beijing, 100094, China.
| | - Zhifang Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, China.
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9
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Identification and characterization of a novel natural recombinant avian leucosis virus from Chinese indigenous chicken flock. Virus Genes 2019; 55:726-733. [PMID: 31396785 DOI: 10.1007/s11262-019-01695-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 07/23/2019] [Indexed: 10/26/2022]
Abstract
Avian leukosis virus (ALV) caused tremendous economic losses to poultry industry all over the world, especially in China. One natural recombinant ALV strain, designated as HB2015032, was isolated from indigenous chickens with neoplastic diseases in Hubei, China. The complete proviral genome of HB2015032 is 7703 bp in length. Sequence analysis showed that the Env of HB2015032 exhibited 99.3% similarity with that of a ALV subgroup K (ALV-K) isolate JS11C1 at amino acid level. Phylogenetic analysis revealed that both gp85 and gp37 of HB2015032 were clustered in the same branch with JS11C1 and other ALV-K strains isolated from Chinese indigenous chickens in recent years. However, the pol gene, the 3' untranslated region (3' UTR), and the 3' long terminal repeat (3' LTR) of HB2015032 were more closely related to ALV-J prototype HPRS-103, and clustered in the same branch with ALV-J strains. Furthermore, the pol gene of HB2015032 contained a premature stop codon that resulted in a truncated Pol protein with 22 amino acid residues missing, which was a unique feature of the pol gene of ALV-J. 3'UTR of HB2015032 containing entire DR1, E element and U3. E element of HB2015032 contained one base deletion, which resulted in a c-Ets-1 binding site. In addition, U3 region of HB2015032 contains most of the transcription regulatory elements of ALV-J, including two CAAT boxes, Y boxes, CArG boxes, PRE boxes, NFAP-1 boxes, and one TATA box. These results suggest that isolate HB2015032 was a novel recombinant ALV-K containing the ALV-K env gene and the ALV-J backbone and exhibiting high pathogenicity.
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Li H, Wang P, Lin L, Shi M, Gu Z, Huang T, Mo M, Wei T, Zhang H, Wei P. The emergence of the infection of subgroup J avian leucosis virus escalated the tumour incidence in commercial Yellow chickens in Southern China in recent years. Transbound Emerg Dis 2018; 66:312-316. [DOI: 10.1111/tbed.13023] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/27/2018] [Accepted: 09/14/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Haijuan Li
- Institute for Poultry Science and Health Guangxi University Nanning Guangxi China
| | - Peikun Wang
- Institute for Poultry Science and Health Guangxi University Nanning Guangxi China
- College of Life Science Linyi University Linyi City Shandong China
| | - Lulu Lin
- Institute for Poultry Science and Health Guangxi University Nanning Guangxi China
| | - Mengya Shi
- Institute for Poultry Science and Health Guangxi University Nanning Guangxi China
| | - Zhanming Gu
- Institute for Poultry Science and Health Guangxi University Nanning Guangxi China
| | - Teng Huang
- Institute for Poultry Science and Health Guangxi University Nanning Guangxi China
| | - Mei‐lan Mo
- Institute for Poultry Science and Health Guangxi University Nanning Guangxi China
| | - Tianchao Wei
- Institute for Poultry Science and Health Guangxi University Nanning Guangxi China
| | - Huanmin Zhang
- United States, Department of Agriculture (USDA) Agricultural Research Service Avian Disease and Oncology Laboratory East Lansing Michigan
| | - Ping Wei
- Institute for Poultry Science and Health Guangxi University Nanning Guangxi China
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11
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Wang P, Lin L, Li H, Shi M, Gu Z, Wei P. Full-length genome sequence analysis of an avian leukosis virus subgroup J (ALV-J) as contaminant in live poultry vaccine: The commercial live vaccines might be a potential route for ALV-J transmission. Transbound Emerg Dis 2018; 65:1103-1106. [PMID: 29479824 DOI: 10.1111/tbed.12841] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Indexed: 11/30/2022]
Abstract
One avian leukosis virus subgroup J (ALV-J) strain was isolated from 67 commercial live poultry vaccines produced by various manufacturers during 2013-2016 in China. The complete genomes of the isolate were sequenced and it was found that the genes gag and pol of the strain were relatively conservative, while the gp85 gene of the strain GX14YYA1 had the highest similarities with a field strain GX14ZS14, which was isolated from the chickens of a farm that had once used the same vaccine as the one found to be contaminated with the GX14YYA1. This is the first report of ALV-J contaminant in live poultry vaccine in China. Our finding demonstrates that vaccination of the commercial live vaccines might be a potential new route for ALV-J transmission in chickens and highlights the need for more extensive monitoring of the commercial live vaccines in China.
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Affiliation(s)
- P Wang
- Institute for Poultry Science and Health, Guangxi University, Nanning, China
| | - L Lin
- Institute for Poultry Science and Health, Guangxi University, Nanning, China
| | - H Li
- Institute for Poultry Science and Health, Guangxi University, Nanning, China
| | - M Shi
- Institute for Poultry Science and Health, Guangxi University, Nanning, China
| | - Z Gu
- Institute for Poultry Science and Health, Guangxi University, Nanning, China
| | - P Wei
- Institute for Poultry Science and Health, Guangxi University, Nanning, China
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12
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Wu X, Zeng Y, Lu R, An Y, Yu S, Zhao J, Wu Y, Wu B, Wang Q, Huang Y. Transcription analysis of the interaction between chicken thymus and recombinant avian leukosis virus isolate FJ15HT0. Virus Res 2018; 244:147-152. [DOI: 10.1016/j.virusres.2017.11.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 10/29/2017] [Accepted: 11/15/2017] [Indexed: 01/20/2023]
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