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Wang L, Zheng G, Yuan Y, Wang Z, Wang Q, Sun M, Wu J, Liu C, Liu Y, Zhang B, Zhang H, Yang N, Lian L. circRUNX2.2, highly expressed in Marek's disease tumor tissues, functions in cis to regulate parental gene RUNX2 expression. Poult Sci 2024; 103:104045. [PMID: 39094493 DOI: 10.1016/j.psj.2024.104045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Revised: 06/22/2024] [Accepted: 06/25/2024] [Indexed: 08/04/2024] Open
Abstract
Marek's disease (MD), an immunosuppression disease induced by Marek's disease virus (MDV), is one of the significant diseases affecting the health and productive performance of poultry. The roles of circular RNAs (circRNAs) in MD development were poorly understood. In this study, we found a circRNA derived from exon 6 of RUNX family transcription factor 2 (RUNX2) gene, named circRUNX2.2, was highly expressed in chicken tumorous spleens (TS) induced by MDV. Through fluorescence in situ hybridization and nuclear-cytoplasmic separation assay, we determined circRUNX2.2 was mainly located in the nucleus. Knockout experiments confirmed that the flanking complementary sequences (RCMs) mediated its circularization. Gain of function assay and dual luciferase reporter gene assay revealed that circRUNX2.2 could promote the expression of RUNX2 via binding with its promoter region. RNA antisense purification assay and mass spectrometry assay showed circRUNX2.2 could recruit proteins such as CHD9 protein. Knocking down CHD9 expression decreased the expression of RUNX2 gene, which confirmed the positive regulation that circRUNX2.2 on RUNX2 expression was probably facilitated via recruiting CHD9 protein. Functional experiments showed that circRUNX2.2 promoted the proliferation of the MD lymphoma-derived chicken cell line, MDCC-MSB1, which confirmed the potential oncogenic role of circRNX2.2 in tumor development. In conclusion, we found that the RUNX2-derived circRUNX2.2 can positively regulate the transcription of the parental gene RUNX2 in a cis-acting manner. The high expression of circRUNX2.2 in MD tumor tissues indicated that it might mediate MD lymphoma progression.
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Affiliation(s)
- Lulu Wang
- Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; MOE Key Laboratory of Bioinformatics, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Gang Zheng
- Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Yiming Yuan
- Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Ziyi Wang
- Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Qinyuan Wang
- Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Meng Sun
- Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Junfeng Wu
- Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Changjun Liu
- Division of Avian Infectious Diseases, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin 150001, China
| | - Yongzhen Liu
- Division of Avian Infectious Diseases, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin 150001, China
| | - Bo Zhang
- Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Hao Zhang
- Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Ning Yang
- Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Ling Lian
- Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
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2
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Wang H, Tian J, Zhao J, Zhao Y, Yang H, Zhang G. Current Status of Poultry Recombinant Virus Vector Vaccine Development. Vaccines (Basel) 2024; 12:630. [PMID: 38932359 PMCID: PMC11209050 DOI: 10.3390/vaccines12060630] [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: 04/29/2024] [Revised: 05/22/2024] [Accepted: 06/03/2024] [Indexed: 06/28/2024] Open
Abstract
Inactivated and live attenuated vaccines are the mainstays of preventing viral poultry diseases. However, the development of recombinant DNA technology in recent years has enabled the generation of recombinant virus vector vaccines, which have the advantages of preventing multiple diseases simultaneously and simplifying the vaccination schedule. More importantly, some can induce a protective immune response in the presence of maternal antibodies and offer long-term immune protection. These advantages compensate for the shortcomings of traditional vaccines. This review describes the construction and characterization of primarily poultry vaccine vectors, including fowl poxvirus (FPV), fowl adenovirus (FAdV), Newcastle disease virus (NDV), Marek's disease virus (MDV), and herpesvirus of turkey (HVT). In addition, the pathogens targeted and the immunoprotective effect of different poultry recombinant virus vector vaccines are also presented. Finally, this review discusses the challenges in developing vector vaccines and proposes strategies for improving immune efficacy.
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Affiliation(s)
- Haoran Wang
- National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (H.W.); (J.T.); (J.Z.); (Y.Z.); (H.Y.)
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Jiaxin Tian
- National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (H.W.); (J.T.); (J.Z.); (Y.Z.); (H.Y.)
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Jing Zhao
- National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (H.W.); (J.T.); (J.Z.); (Y.Z.); (H.Y.)
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Ye Zhao
- National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (H.W.); (J.T.); (J.Z.); (Y.Z.); (H.Y.)
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Huiming Yang
- National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (H.W.); (J.T.); (J.Z.); (Y.Z.); (H.Y.)
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Guozhong Zhang
- National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (H.W.); (J.T.); (J.Z.); (Y.Z.); (H.Y.)
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
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3
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Martínez-López MF, Muslin C, Kyriakidis NC. STINGing Defenses: Unmasking the Mechanisms of DNA Oncovirus-Mediated Immune Escape. Viruses 2024; 16:574. [PMID: 38675916 PMCID: PMC11054469 DOI: 10.3390/v16040574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/21/2024] [Accepted: 03/26/2024] [Indexed: 04/28/2024] Open
Abstract
DNA oncoviruses represent an intriguing subject due to their involvement in oncogenesis. These viruses have evolved mechanisms to manipulate the host immune response, facilitating their persistence and actively contributing to carcinogenic processes. This paper describes the complex interactions between DNA oncoviruses and the innate immune system, with a particular emphasis on the cGAS-STING pathway. Exploring these interactions highlights that DNA oncoviruses strategically target and subvert this pathway, exploiting its vulnerabilities for their own survival and proliferation within the host. Understanding these interactions lays the foundation for identifying potential therapeutic interventions. Herein, we sought to contribute to the ongoing efforts in advancing our understanding of the innate immune system in oncoviral pathogenesis.
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Affiliation(s)
- Mayra F Martínez-López
- Cancer Research Group (CRG), Faculty of Medicine, Universidad de las Américas, Quito 170503, Ecuador;
| | - Claire Muslin
- One Health Research Group, Faculty of Health Sciences, Universidad de las Américas, Quito 170503, Ecuador;
| | - Nikolaos C. Kyriakidis
- Cancer Research Group (CRG), Faculty of Medicine, Universidad de las Américas, Quito 170503, Ecuador;
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He Y, Taylor RL, Bai H, Ashwell CM, Zhao K, Li Y, Sun G, Zhang H, Song J. Transgenerational epigenetic inheritance and immunity in chickens that vary in Marek's disease resistance. Poult Sci 2023; 102:103036. [PMID: 37832188 PMCID: PMC10568563 DOI: 10.1016/j.psj.2023.103036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 07/31/2023] [Accepted: 08/11/2023] [Indexed: 10/15/2023] Open
Abstract
Marek's disease virus (MDV), a naturally oncogenic, highly contagious alpha herpesvirus, induces a T cell lymphoma in chickens that causes severe economic loss. Marek's disease (MD) outcome in an individual is attributed to genetic and environmental factors. Further investigation of the host-virus interaction mechanisms that impact MD resistance is needed to achieve greater MD control. This study analyzed genome-wide DNA methylation patterns in 2 highly inbred parental lines 63 and 72 and 5 recombinant congenic strains (RCS) C, L, M, N, and X strains from those parents. Lines 63 and 72, are MD resistant and susceptible, respectively, whereas the RCS have different combinations of 87.5% Line 63 and 12.5% Line 72. Our DNA methylation cluster showed a strong association with MD incidence. Differentially methylated regions (DMRs) between the parental lines and the 5 RCS were captured. MD-resistant and MD-susceptible markers of DNA methylation were identified as transgenerational epigenetic inheritable. In addition, the growth of v-src DNA tumors and antibody response against sheep red blood cells differed among the 2 parental lines and the RCS. Overall, our results provide very solid evidence that DNA methylation patterns are transgenerational epigenetic inheritance (TEI) in chickens and also play a vital role in MD tumorigenesis and other immune responses; the specific methylated regions may be important modulators of general immunity.
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Affiliation(s)
- Yanghua He
- Department of Human Nutrition, Food and Animal Sciences, University of Hawaii at Manoa, Honolulu, HI, 96822 USA; Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20742 USA
| | - Robert L Taylor
- Division of Animal and Nutritional Sciences West Virginia University, Morgantown, WV 26508 USA
| | - Hao Bai
- Department of Joint International Research Laboratory of Agriculture and Agri-Product Safety, Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou 225009, China
| | - Christopher M Ashwell
- Division of Animal and Nutritional Sciences West Virginia University, Morgantown, WV 26508 USA
| | - Keji Zhao
- Laboratory of Epigenome Biology, Systems Biology Center, National Heart, Lung and Blood Institute, NIH, Bethesda, MD, USA
| | - Yaokun Li
- College of Animal Science, South China Agricultural University, Guangzhou, GD 510642, China
| | - Guirong Sun
- College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Huanmin Zhang
- USDA, Agricultural Research Service, Avian Disease and Oncology Laboratory, East Lansing, MI 48823, USA
| | - Jiuzhou Song
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20742 USA.
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5
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Oluwayinka EB, Otesile EB, Oni OO, Ajayi OL, Dunn JR. Molecular characterization and phylogenetic analysis of Marek's disease virus in chickens from Ogun State, Nigeria. Avian Pathol 2023; 52:401-411. [PMID: 37605844 DOI: 10.1080/03079457.2023.2243838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 07/26/2023] [Indexed: 08/23/2023]
Abstract
Marek's disease (MD) is caused by oncogenic MD virus serotype 1 (MDV1) and is characterized by lymphoproliferative lesions resulting in high morbidity and mortality in chickens. Despite being ubiquitous on poultry farms, there is a dearth of information on its molecular characteristics in Nigeria. This study aimed at characterizing three virulence genes (Meq, pp38, and vIL-8) of MDV1 from chickens in Ogun state, Nigeria. Blood, feather quill, and tumour samples of chickens from different commercial poultry farms in Ogun State were pooled, spotted on 107 FTA cards, and screened for MDV1 by polymerase chain reaction (PCR). Phylogenetic analysis was carried out to compare Nigerian MDV1 Meq, pp38, and vIL-8 genes sequences with the published references. Thirteen samples were MDV1-positive and the Meq, as well as pp38, and vIL-8 genes from the different samples were 100% identical. The Meq genes contained 339 amino acids (aa) with three PPPP motifs in the transactivation domain and two interruptions of the PPPP motifs due to proline-to-arginine substitutions at positions 176 and 217 resulting in a 20.88% proline composition. Phylogenetic analysis revealed that the Meq gene clustered with strains from Egypt and very virulent ATE2539 strain from Hungary. Mutations were observed in the pp38 protein (at positions 107 and 109) and vIL-8 protein (at positions 4 and 31). Based on the molecular analysis of the three genes, the results indicate the presence of MDV1 with virulence signatures; therefore, further studies on in vivo pathotyping of Nigerian MDV1 from all states should be performed.RESEARCH HIGHLIGHTS Meq, pp38 and vIL-8 genes were 100% identical between Nigerian MDV strains.Proline content in Nigerian meq gene was 20.88% with two PPPP motifs interruptions.Meq, pp38 and vIL-8 genes of Nigerian MDV were similar to Egyptian and Indian strains.
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Affiliation(s)
- E B Oluwayinka
- Department of Veterinary Medicine, Federal University of Agriculture Abeokuta, Abeokuta, Nigeria
| | - E B Otesile
- Department of Veterinary Medicine, Federal University of Agriculture Abeokuta, Abeokuta, Nigeria
| | - O O Oni
- Department of Veterinary Medicine, Federal University of Agriculture Abeokuta, Abeokuta, Nigeria
| | - O L Ajayi
- Department of Veterinary Pathology, Federal University of Agriculture Abeokuta, Abeokuta, Nigeria
| | - J R Dunn
- US National Poultry Research Center, Athens, GA, USA
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Wang Q, Shi B, Yang G, Zhu X, Shao H, Qian K, Ye J, Qin A. Metabolomic profiling of Marek's disease virus infection in host cell based on untargeted LC-MS. Front Microbiol 2023; 14:1270762. [PMID: 38029131 PMCID: PMC10666056 DOI: 10.3389/fmicb.2023.1270762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023] Open
Abstract
Marek's disease (MD) caused by Marek's disease virus (MDV), poses a serious threat to the poultry industry by inducing neurological disease and malignant lymphoma in infected chickens. However, the underlying mechanisms how MDV disrupts host cells and causes damage still remain elusive. Recently, the application of metabolomics has shown great potential for uncovering the complex mechanisms during virus-host interactions. In this study, chicken embryo fibroblasts (CEFs) infected with MDV were subjected to ultrahigh-performance liquid chromatography-quadrupole time-of-flight tandem mass spectrometry (UHPLC-QTOF-MS) and multivariate statistical analysis. The results showed that 261 metabolites were significantly altered upon MDV infection, with most changes occurring in amino acid metabolism, energy metabolism, nucleotide metabolism, and lipid metabolism. Notably, MDV infection induces an up-regulation of amino acids in host cells during the early stages of infection to provide the energy and intermediary metabolites necessary for efficient multiplication of its own replication. Taken together, these data not only hold promise in identifying the biochemical molecules utilized by MDV replication in host cells, but also provides a new insight into understanding MDV-host interactions.
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Affiliation(s)
- Qingsen Wang
- The International Joint Laboratory for Cooperation in Agriculture and Agricultural Product Safety, Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou, Jiangsu, China
| | - Bin Shi
- The International Joint Laboratory for Cooperation in Agriculture and Agricultural Product Safety, Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou, Jiangsu, China
| | - Guifu Yang
- The International Joint Laboratory for Cooperation in Agriculture and Agricultural Product Safety, Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou, Jiangsu, China
| | - Xueying Zhu
- The International Joint Laboratory for Cooperation in Agriculture and Agricultural Product Safety, Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou, Jiangsu, China
| | - Hongxia Shao
- The International Joint Laboratory for Cooperation in Agriculture and Agricultural Product Safety, Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou, Jiangsu, China
| | - Kun Qian
- The International Joint Laboratory for Cooperation in Agriculture and Agricultural Product Safety, Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou, Jiangsu, China
| | - Jianqiang Ye
- The International Joint Laboratory for Cooperation in Agriculture and Agricultural Product Safety, Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou, Jiangsu, China
| | - Aijian Qin
- The International Joint Laboratory for Cooperation in Agriculture and Agricultural Product Safety, Ministry of Education, Yangzhou University, Yangzhou, Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou, Jiangsu, China
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7
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Zheng C, Liang Z, Lin Q, Chen M, Chang C, Zhou J, Yang F, Chen Y, Zhao M, Huang L, Qin L. Pathology, viremia, apoptosis during MDV latency in vaccinated chickens. Virology 2023; 579:169-177. [PMID: 36696868 DOI: 10.1016/j.virol.2023.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/10/2022] [Accepted: 01/04/2023] [Indexed: 01/15/2023]
Abstract
Marek's disease, caused by herpes virus infection, is a highly contagious disease characterized by latent infection. Here, we aimed to study the pathology, viremia and apoptosis during the Marek's Disease Virus (MDV) latency in vaccinated chickens. Vaccinated chickens were inoculated with the MD5 strain and were dissected at different time points. The viremia occurs in the spleen and thymus during the latency period of MD5 infection, however, lesions can be observed in the liver tissue. The latency-associated early gene of MDV, i.e., ICP4, was highly expressed in the spleen and thymus during the early latency. Compared with the early cytolytic stage, apoptosis of splenocytes was remarkably downregulated in the latency period. This study suggests that MDV latency could occur in the spleen and thymus in vaccinated chickens and there is a negative correlation between the MDV latency and apoptosis of spleen. MDV latency can resist the apoptosis of spleen.
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Affiliation(s)
- Congsen Zheng
- School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Zexian Liang
- School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Qiaoer Lin
- School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Meiting Chen
- School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Chuanzhe Chang
- School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Jun Zhou
- School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Fan Yang
- School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Yanfeng Chen
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, Foshan University, Foshan, Guangdong, China; School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Mengmeng Zhao
- School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Liangzong Huang
- School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China.
| | - Limei Qin
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, Foshan University, Foshan, Guangdong, China; School of Life Science and Engineering, Foshan University, Foshan, Guangdong, China.
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Bussy F, Rémy S, Le Goff M, Collén PN, Trapp-Fragnet L. The sulphated polysaccharides extract ulvans from Ulva armoricana limits Marek's disease virus dissemination in vitro and promotes viral reactivation in lymphoid cells. BMC Vet Res 2022; 18:155. [PMID: 35477401 PMCID: PMC9044586 DOI: 10.1186/s12917-022-03247-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 03/31/2022] [Indexed: 12/15/2022] Open
Abstract
Background Marek’s disease (MD) is a highly contagious lymphoproliferative disease of chickens caused by an alphaherpesvirus, Marek’s disease virus (MDV). MD is presently controlled by systematic vaccination of animals, which protects efficiently against the development of clinical disease. However, MDV vaccines do not prevent the multiplication and spread of MDV field strains and may favor the emergence of strains with increased virulence. Therefore, MDV persists to be a major problem for the poultry industry and the development of new alternative strategies to control MDV is needed. Seaweed extracts have previously been shown to exert immunomodulatory and antiviral activities, especially against herpesviruses. The objective of the present study was to explore the effect of Ulva armoricana extracts on MDV infection in vitro. Results We could demonstrate that the ulvan extract as well as its vitamin-enriched formulation reduce the viral load by about 80% at 24 h post-infection in infected chicken fibroblasts at concentrations that are innocuous for the cells. We also observed a substantial decrease in MDV plaque size suggesting that ulvans impede MDV cell-to-cell spread in vitro. Moreover, we showed that ulvan extract could promote MDV reactivation in lymphoid cells. Conclusions Our data provide the first evidence that the use of the ulvan extract could be a good alternative to limit MDV infection in poultry.
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Affiliation(s)
- Frédérick Bussy
- Amadeite SAS, 56580, Bréhan, France.,Olmix, SALe Lintan, 56580, Bréhan, France
| | - Sylvie Rémy
- INRAE, Université de Tours, ISP, F-37380, Nouzilly, France
| | - Matthieu Le Goff
- Amadeite SAS, 56580, Bréhan, France.,Olmix, SALe Lintan, 56580, Bréhan, France
| | - Pi Nyvall Collén
- Amadeite SAS, 56580, Bréhan, France.,Olmix, SALe Lintan, 56580, Bréhan, France
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B cells do not play a role in vaccine-mediated immunity against Marek's disease. Vaccine X 2022; 10:100128. [PMID: 34977551 PMCID: PMC8686028 DOI: 10.1016/j.jvacx.2021.100128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 10/01/2021] [Accepted: 12/01/2021] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Marek's disease virus (MDV), a highly oncogenic α-herpesvirus, is the etiological agent of Marek's disease (MD) in chickens. The antiviral activity of vaccine-induced immunity against MD reduces the level of early cytolytic infection, production of cell-free virions in the feather follicle epithelial cells (FFE), and lymphoma formation. Despite the success of several vaccines that have greatly reduced the economic losses from MD, the mechanism of vaccine-induced immunity is poorly understood. METHODS To provide insight into possible role of B cells in vaccine-mediated protection, we bursectomized birds on day of hatch and vaccinated them eight days later. The birds were challenged 10 days post vaccination with or without receiving adoptive lymphocytes from age-matched control birds prior to inoculation. The study also included vaccinated/challenged and non-vaccinated challenged intact birds. Flowcytometric analysis of PBMN cells were conducted twice post bursectomy to confirm B cell depletion and assess the effect of surgery on T cell population. Immunohistochemical analysis and viral genome copy number assessment in the skin samples at termination was performed to measure the replication rate of MDV in the FFE of the skin tissues of the challenged birds. RESULTS The non-vaccinated/challenged birds developed typical clinical signs of MD while the vaccinated/challenged and bursectomized, vaccinated/challenged groups with or without adoptive lymphocyte transfer, were fully protected with no sign of transient paralysis, weight loss, or T cell lymphomas. Immunohistochemical analysis and viral genome copy number evaluation in the skin samples revealed that unlike the vaccinated/challenged birds a significant number of virus particles were produced in the FFE of the non-vaccinated/challenged birds at termination. In the bursectomized, vaccinated/challenged groups, only a few replicating virions were detected in the skin of birds that received adoptive lymphocytes prior to challenge. CONCLUSIONS The study shows that B cells do not play a critical role in MD vaccine-mediated immunity.
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Song B, Zeb J, Hussain S, Aziz MU, Circella E, Casalino G, Camarda A, Yang G, Buchon N, Sparagano O. A Review on the Marek's Disease Outbreak and Its Virulence-Related meq Genovariation in Asia between 2011 and 2021. Animals (Basel) 2022; 12:ani12050540. [PMID: 35268107 PMCID: PMC8908813 DOI: 10.3390/ani12050540] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 02/17/2022] [Accepted: 02/18/2022] [Indexed: 02/01/2023] Open
Abstract
Simple Summary Marek’s disease is continuously causing an economic loss in Asia, despite the wide use of vaccines in the last decade. This review aims at summarizing the outbreak, the virulence-related meq gene variation, and the pathological information of Marek’s disease in the last decade in Asia. We found that a total of 132 viral strains emerged in 12 countries with different meq sequences. Among the evidence we have collected, 12 strains found in China were vaccine-resistant, reaching a mortality rate of 30% and above. This evidence requires the related region in China to consider the renewal of its vaccination type; however, more studies regarding the vaccination efficiency in other Asian countries are recommended, as the current information is not enough. The visceral tumor is the most common pathological type (13 in 16 studies) in Asia, while it is possible that a neural type may exist. We suggest that farmers monitor the behavioral changes of chickens to identify this harmful disease at the early stage. The phylogenetic analysis shows interconnection between Middle Eastern, South Asian, and East Asian countries that are geologically connected—poultry trading managers should consider the potential of viral transmitting. Abstract Marek’s disease is an infectious disease in poultry that usually appears in neural and visceral tumors. This disease is caused by Gallid alphaherpesvirus 2 infection in lymphocytes, and its meq gene is commonly used in virulent studies for coding the key protein functional in oncogenic transformation of the lymphocytes. Although vaccines have been introduced in many countries to control its spread and are proven to be efficient, recent records show a decline of such efficiency due to viral evolution. In this study, we reviewed the outbreak of Marek’s disease in Asia for the last 10 years, together with associated meq sequences, finding a total of 36 studies recording outbreaks with 132 viral strains in 12 countries. The visceral type is the most common (13 in 16 studies) form of Marek’s disease, but additional unobserved neural changes may exist. MD induces liver lymphoma most frequently (11 in 14 studies), and tumors were also found in spleen, kidney, heart, gizzard, skin, intestine, lung, and sciatic nerve. Twelve viral strains distributed in China have been reported to escape the CVI988 vaccine, reaching a mortality rate of more than 30%. Phylogenetic analyses show the internal connection between the Middle East (Turkey, Iraq, Iran, Saudi Arabia), South Asia (India, Indonesia), and East Asia (China and Japan), while external viral communications might occasionally occur. In 18 strains with both sequential and mortality data, amino acid alignment showed several point substitutions that may be related to its virulence. We suggest more behavioral monitoring in Marek’s disease-endemic regions and further studies on strain virulence, together with its Meq protein structural changes.
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Affiliation(s)
- Baolin Song
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong 999077, China; (B.S.); (J.Z.); (S.H.); (M.U.A.); (G.Y.)
| | - Jehan Zeb
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong 999077, China; (B.S.); (J.Z.); (S.H.); (M.U.A.); (G.Y.)
| | - Sabir Hussain
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong 999077, China; (B.S.); (J.Z.); (S.H.); (M.U.A.); (G.Y.)
| | - Muhammad Umair Aziz
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong 999077, China; (B.S.); (J.Z.); (S.H.); (M.U.A.); (G.Y.)
| | - Elena Circella
- Department of Veterinary Medicine, University of Bari, S.P. Casamassima km. 3, 70010 Valenzano, Italy; (E.C.); (G.C.); (A.C.)
| | - Gaia Casalino
- Department of Veterinary Medicine, University of Bari, S.P. Casamassima km. 3, 70010 Valenzano, Italy; (E.C.); (G.C.); (A.C.)
| | - Antonio Camarda
- Department of Veterinary Medicine, University of Bari, S.P. Casamassima km. 3, 70010 Valenzano, Italy; (E.C.); (G.C.); (A.C.)
| | - Guan Yang
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong 999077, China; (B.S.); (J.Z.); (S.H.); (M.U.A.); (G.Y.)
| | - Nicolas Buchon
- Department of Entomology, Cornell Institute of Host-Microbe Interactions and Disease, Cornell University, Ithaca, NY 14853, USA;
| | - Olivier Sparagano
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong 999077, China; (B.S.); (J.Z.); (S.H.); (M.U.A.); (G.Y.)
- Correspondence:
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Exploration of Alternative Splicing (AS) Events in MDV-Infected Chicken Spleens. Genes (Basel) 2021; 12:genes12121857. [PMID: 34946806 PMCID: PMC8701255 DOI: 10.3390/genes12121857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/18/2021] [Accepted: 11/19/2021] [Indexed: 11/16/2022] Open
Abstract
Marek’s disease (MD) was an immunosuppression disease induced by Marek’s disease virus (MDV). MD caused huge economic loss to the global poultry industry, but it also provided an ideal model for studying diseases induced by the oncogenic virus. Alternative splicing (AS) simultaneously produced different isoform transcripts, which are involved in various diseases and individual development. To investigate AS events in MD, RNA-Seq was performed in tumorous spleens (TS), spleens from the survivors (SS) without any lesion after MDV infection, and non-infected chicken spleens (NS). In this study, 32,703 and 25,217 AS events were identified in TS and SS groups with NS group as the control group, and 1198, 1204, and 348 differently expressed (DE) AS events (p-value < 0.05 and FDR < 0.05) were identified in TS vs. NS, TS vs. SS, SS vs. NS, respectively. Additionally, Function enrichment analysis showed that ubiquitin-mediated proteolysis, p53 signaling pathway, and phosphatidylinositol signaling system were significantly enriched (p-value < 0.05). Small structural variations including SNP and indel were analyzed based on RNA-Seq data, and it showed that the TS group possessed more variants on the splice site region than those in SS and NS groups, which might cause more AS events in the TS group. Combined with previous circRNA data, we found that 287 genes could produce both circular and linear RNAs, which suggested these genes were more active in MD lymphoma transformation. This study has expanded the understanding of the MDV infection process and provided new insights for further analysis of resistance/susceptibility mechanisms.
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Okura T, Otomo H, Taneno A, Oishi E. Replication kinetics of turkey herpesvirus in lymphoid organs and feather follicle epithelium in chickens. J Vet Med Sci 2021; 83:1582-1589. [PMID: 34470973 PMCID: PMC8569884 DOI: 10.1292/jvms.21-0247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Marek’s disease virus (MDV) is an oncogenic alphaherpesvirus that causes
immunosuppression, T-cell lymphomas, and neuropathic disease in infected chickens. To
protect chickens from MDV infection, an avirulent live vaccine of turkey herpesvirus (HVT)
has been successfully used for chickens worldwide. Similar to MDV for natural infection in
both chickens and turkeys, HVT also infects lung in the early stage of infection and then
lymphocytes from lymphoid organs. Virus replication requires cell-to-cell contact for
spreading and semi-productive lytic replication in T and B cells. Then, cell-free
infectious virions matured in the feather follicle epithelium (FFE) are released and
spread through the feather from infected turkeys or chickens. To understand the lifecycle
of HVT in inoculated chickens via the subcutaneous route, we investigate the replication
kinetics and tissue organ tropism of HVT in chickens by a subcutaneous inoculation which
is a major route of MDV vaccination. We show that the progeny virus matured in lymphocytes
from the thymus, spleen, and lung as early as 2 days post-infection (dpi) and bursa of
Fabricius at 4 dpi, whereas viral maturation in the FFE was observed at 6 dpi.
Furthermore, semi-quantitative reverse transcription-PCR experiments to measure viral mRNA
expression levels revealed that the higher expression levels of the late genes were
associated with viral maturation in the FFE. These data that tropism and replication
kinetics of HVT could be similar to those of MDV through the intake pathway of natural
infection from respiratory tracts.
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Affiliation(s)
- Takashi Okura
- Vaxxinova Japan, Choka 809, Nikko, Tochigi 321-1103, Japan
| | - Hiroki Otomo
- Vaxxinova Japan, Choka 809, Nikko, Tochigi 321-1103, Japan
| | - Akira Taneno
- Vaxxinova Japan, Choka 809, Nikko, Tochigi 321-1103, Japan
| | - Eiji Oishi
- Vaxxinova Japan, Choka 809, Nikko, Tochigi 321-1103, Japan
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13
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Okura T, Taneno A, Oishi E. Cell-to-Cell Transmission of Turkey Herpesvirus in Chicken Embryo Cells via Tunneling Nanotubes. Avian Dis 2021; 65:335-339. [PMID: 34427404 DOI: 10.1637/aviandiseases-d-21-00022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 04/26/2021] [Indexed: 11/05/2022]
Abstract
Marek's disease virus (MDV) is an oncogenic alphaherpesvirus that causes immunosuppression, T cell lymphomas, and neuropathic disease in infected chickens. To protect chickens from MDV infection, an avirulent live vaccine of turkey herpesvirus (HVT) has been successfully used in chickens worldwide. Many vaccine manufacturers have used chicken embryo fibroblast (CEF) cells to produce the HVT vaccine. Generally, it has been suggested that HVT is a highly cell-associated herpesvirus that spread via cell-to-cell contact, but it is unclear how HVT is transmitted from infected cells to uninfected target cells. Here, we show via immunofluorescence analysis that nanotubes containing the actin cytoskeleton and HVT antigens from infected CEF cells were observed to contact neighboring cells. When the infected cells were treated with inhibitors for actin polymerization or depolymerization, the formation and extension of the nanotubes from infected cells were greatly inhibited and the intercellular contact was abolished, leading to a drastic reduction in plaque formation and viral titers of the cell-associated virus. Our data indicate that cell-to-cell contacts via nanotubes composed of actin filaments are essential for efficient viral spreading and replication. This finding might contribute to the further improvement of efficient HVT vaccine production.
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Affiliation(s)
| | | | - Eiji Oishi
- Vaxxinova Japan, Nikko, Tochigi, 321-1103 Japan
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Liao Y, Bajwa K, Al-Mahmood M, Gimeno IM, Reddy SM, Lupiani B. The role of Meq-vIL8 in regulating Marek's disease virus pathogenesis. J Gen Virol 2021; 102. [PMID: 33236979 DOI: 10.1099/jgv.0.001528] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Marek's disease virus (MDV) is a highly cell-associated oncogenic alphaherpesvirus that causes T cell lymphoma in chickens. MDV-encoded Meq and vIL8 proteins play important roles in transformation and early cytolytic infection, respectively. Previous studies identified a spliced transcript, meq-vIL8, formed by alternative splicing of meq and vIL8 genes in MDV lymphoblastoid tumour cells. To determine the role of Meq-vIL8 in MDV pathogenesis, we generated a recombinant MDV (MDV-meqΔSD) by mutating the splice donor site in the meq gene to abrogate the expression of Meq-vIL8. As expected, our results show that MDV-meqΔSD virus grows similarly to the parental and revertant viruses in cell culture, suggesting that Meq-vIL8 is dispensable for MDV growth in vitro. We further characterized the pathogenic properties of MDV-meqΔSD virus in chickens. Our results show that lack of Meq-vIL8 did not affect virus replication during the early cytolytic phase, as determined by immunohistochemistry analysis and/or viral genome copy number, but significantly enhanced viral DNA load in the late phase of infection in the spleen and brain of infected chickens. In addition, we observed that abrogation of Meq-vIL8 expression reduced the mean death time and increased the prevalence of persistent neurological disease, common features of highly virulent strains of MDV, in inoculated chickens. In conclusion, our study shows that Meq-vIL8 is an important virulence factor of MDV.
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Affiliation(s)
- Yifei Liao
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Kanika Bajwa
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Mohammad Al-Mahmood
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Isabel M Gimeno
- North Carolina State University, College of Veterinary Medicine, 1060 William Moore Drive, Raleigh, North Carolina 27607, USA
| | - Sanjay M Reddy
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
| | - Blanca Lupiani
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843, USA
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Yehia N, El-Sayed HS, Omar SE, Erfan A, Amer F. Genetic evolution of Marek's disease virus in vaccinated poultry farms. Vet World 2021; 14:1342-1353. [PMID: 34220140 PMCID: PMC8243665 DOI: 10.14202/vetworld.2021.1342-1353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 04/09/2021] [Indexed: 11/24/2022] Open
Abstract
Background and Aim: The Marek’s disease virus (MDV) is a neoplastic disease causing serious economic losses in poultry production. This study aimed to investigate MDV occurrence in poultry flocks in the Lower Egypt during the 2020 breakout and genetically characterized Meq, gL, and ICP4 genes in field strains of MDV. Materials and Methods: Forty samples were collected from different breeds from eight Egyptian governorates in 2020. All flocks had received a bivalent vaccine (herpesvirus of turkey FC-126 + Rispens CVI988). However, weight loss, emaciation, reduced egg production, paralysis, and rough/raised feather follicles occurred. Samples were collected from feather follicles, liver, spleen, and nerve tissue for diagnosis by polymerase chain reaction. MDV genetic characterization was then performed by sequencing the Meq, gL, and ICP4 genes of five positive samples representing different governorates and breeds. Results: A total of 28 samples were positive for MDV field strains, while two were related to MDV vaccinal strains. All samples tested negative for ALV (A, B, C, D, and J) and REV. Phylogenetic analysis of the Meq gene of sequenced samples revealed that all MDVs were related to the highly virulent European viruses (Gallid herpesvirus 2 ATE and PC12/30) with high amino acid (A.A.) identity 99.2-100%. Alternatively, there was low A.A. identity with the vaccine strains CVI988 and 3004 (up to 82.5%). These results indicate that further investigation of the efficacy of current Egyptian vaccines is required. The Egyptian strains also harbor a specific mutation, allowing clustering into two subgroups (A and B). By mutation analysis of the Meq gene, the Egyptian viruses in our study had R101K, P217A, and E263D mutations present in all Egyptian viruses. Furthermore, R176A and T180A mutations specific to our strains contributed to the high virulence of highly virulent strains. There were no mutations of the gL or ICP4 genes. Conclusion: Further studies should evaluate the protection contributed by current vaccines used in Egypt.
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Affiliation(s)
- Nahed Yehia
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Dokki, Giza 12618, Egypt
| | - Hemat S El-Sayed
- Department of Poultry Diseases, Benha Provincial Laboratory, Animal Health Research Institute, Agricultural Research Center, Giza, Egypt
| | - Sabry E Omar
- Department of Poultry Diseases, Benha Provincial Laboratory, Animal Health Research Institute, Agricultural Research Center, Giza, Egypt
| | - Ahmed Erfan
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Dokki, Giza 12618, Egypt
| | - Fatma Amer
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Dokki, Giza 12618, Egypt
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Liao Y, Lupiani B, AI-Mahmood M, Reddy SM. Marek's disease virus US3 protein kinase phosphorylates chicken HDAC 1 and 2 and regulates viral replication and pathogenesis. PLoS Pathog 2021; 17:e1009307. [PMID: 33596269 PMCID: PMC7920345 DOI: 10.1371/journal.ppat.1009307] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 03/01/2021] [Accepted: 01/12/2021] [Indexed: 12/15/2022] Open
Abstract
Marek’s disease virus (MDV) is a potent oncogenic alphaherpesvirus that elicits a rapid onset of malignant T-cell lymphomas in chickens. Three MDV types, including GaHV-2 (MDV-1), GaHV-3 (MDV-2) and MeHV-1 (HVT), have been identified and all encode a US3 protein kinase. MDV-1 US3 is important for efficient virus growth in vitro. To study the role of US3 in MDV replication and pathogenicity, we generated an MDV-1 US3-null virus and chimeric viruses by replacing MDV-1 US3 with MDV-2 or HVT US3. Using MD as a natural virus-host model, we showed that both MDV-2 and HVT US3 partially rescued the growth deficiency of MDV-1 US3-null virus. In addition, deletion of MDV-1 US3 attenuated the virus resulting in higher survival rate and lower MDV specific tumor incidence, which could be partially compensated by MDV-2 and HVT US3. We also identified chicken histone deacetylase 1 (chHDAC1) as a common US3 substrate for all three MDV types while only US3 of MDV-1 and MDV-2 phosphorylate chHDAC2. We further determined that US3 of MDV-1 and HVT phosphorylate chHDAC1 at serine 406 (S406), while MDV-2 US3 phosphorylates S406, S410, and S415. In addition, MDV-1 US3 phosphorylates chHDAC2 at S407, while MDV-2 US3 targets S407 and S411. Furthermore, biochemical studies show that MDV US3 mediated phosphorylation of chHDAC1 and 2 affect their stability, transcriptional regulation activity, and interaction network. Using a class I HDAC specific inhibitor, we showed that MDV US3 mediated phosphorylation of chHDAC1 and 2 is involved in regulation of virus replication. Overall, we identified novel substrates for MDV US3 and characterized the role of MDV US3 in MDV pathogenesis. Marek’s disease virus (MDV) is a highly contagious and oncogenic avian alphaherpesvirus that causes T-cell lymphomas in chickens. Alphaherpesviruses encoded US3 is a multifunctional protein kinase involved in viral replication, apoptosis resistance, and cell-to-cell spread. In this study, we evaluated the importance of MDV US3 in regulating MDV replication and pathogenesis in chickens. Our results provide first evidence that MDV US3 protein kinase is involved in the replication and pathogenicity of MDV in its natural host. We also identified chicken histone deacetylase 1 and 2 (chHDAC1 and 2) as novel substrates of US3 for MDV and characterized the potential impacts of MDV US3 induced phosphorylation in their protein stability, transcriptional regulation and protein interactions; to our knowledge, this is the first comparative study of the functions of US3 from all three MDV types. This is an important finding towards a better understanding of the functions of alphaherpesviruses encoded US3 protein kinase.
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Affiliation(s)
- Yifei Liao
- Department of Veterinary Pathobiology, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, United States of America
| | - Blanca Lupiani
- Department of Veterinary Pathobiology, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, United States of America
| | - Mohammad AI-Mahmood
- Department of Veterinary Pathobiology, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, United States of America
| | - Sanjay M. Reddy
- Department of Veterinary Pathobiology, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, Texas, United States of America
- * E-mail:
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Occurrence of Marek's Disease in Poland on the Basis of Diagnostic Examination in 2015-2018. J Vet Res 2020; 64:503-507. [PMID: 33367138 PMCID: PMC7734681 DOI: 10.2478/jvetres-2020-0079] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 11/17/2020] [Indexed: 01/12/2023] Open
Abstract
Introduction Marek’s disease (MD) is a tumourous disease caused by Marek’s disease virus (MDV) and most commonly described in poultry. The aim of the study was to determine the occurrence of Marek’s disease virus infections in Poland and analyse clinical cases in the years 2015–2018. Material and Methods The birds for diagnostic examination originated from 71 poultry flocks of various types of production. Birds were subjected to anatomopathological examination post mortem, during which liver and spleen sections and other pathologically changed internal organs were taken. These sections were homogenised with generally accepted methods, then total DNA was isolated and amplified with a real-time PCR. A pair of primers complementary to the MDV genome region encoding the meq gene were used. Results MDV infection was found predominantly in broiler chicken flocks (69.01%), and also in layer breeder (9.85%) and commercial layer flocks (7.04% each). Conclusion The results of research conducted in the years 2015–2018 clearly indicate that the problem of MDV infections is still current.
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Stolz ML, McCormick C. The bZIP Proteins of Oncogenic Viruses. Viruses 2020; 12:v12070757. [PMID: 32674309 PMCID: PMC7412551 DOI: 10.3390/v12070757] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/08/2020] [Accepted: 07/13/2020] [Indexed: 12/20/2022] Open
Abstract
Basic leucine zipper (bZIP) transcription factors (TFs) govern diverse cellular processes and cell fate decisions. The hallmark of the leucine zipper domain is the heptad repeat, with leucine residues at every seventh position in the domain. These leucine residues enable homo- and heterodimerization between ZIP domain α-helices, generating coiled-coil structures that stabilize interactions between adjacent DNA-binding domains and target DNA substrates. Several cancer-causing viruses encode viral bZIP TFs, including human T-cell leukemia virus (HTLV), hepatitis C virus (HCV) and the herpesviruses Marek’s disease virus (MDV), Epstein–Barr virus (EBV) and Kaposi’s sarcoma-associated herpesvirus (KSHV). Here, we provide a comprehensive review of these viral bZIP TFs and their impact on viral replication, host cell responses and cell fate.
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Lin J, Ai Y, Zhou H, Lv Y, Wang M, Xu J, Yu C, Zhang H, Wang M. UL36 Encoded by Marek's Disease Virus Exhibits Linkage-Specific Deubiquitinase Activity. Int J Mol Sci 2020; 21:E1783. [PMID: 32150874 PMCID: PMC7084888 DOI: 10.3390/ijms21051783] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 02/29/2020] [Accepted: 03/02/2020] [Indexed: 12/19/2022] Open
Abstract
(1) Background: Deubiquitinase (DUB) regulates various important cellular processes via reversing the protein ubiquitination. The N-terminal fragment of a giant tegument protein, UL36, encoded by the Marek's disease (MD) virus (MDV), encompasses a putative DUB (UL36-DUB) and shares no homology with any known DUBs. The N-terminus 75 kDa fragment of UL36 exists in MD T lymphoma cells at a high level and participates in MDV pathogenicity. (2) Methods: To characterize deubiquitinating activity and substrate specificity of UL36-DUB, the UL36 N-terminal fragments, UL36(323), UL36(480), and mutants were prepared using the Bac-to-Bac system. The deubiquitinating activity and substrate specificity of these recombinant UL36-DUBs were analyzed using various ubiquitin (Ub) or ubiquitin-like (UbL) substrates and activity-based deubiquitinating enzyme probes. (3) Results: The results indicated that wild type UL36-DUBs show a different hydrolysis ability against varied types of ubiquitin chains. These wild type UL36-DUBs presented the highest activity to K11, K48, and K63 linkage Ub chains, weak activity to K6, K29, and K33 Ub chains, and no activity to K27 linkage Ub chain. UL36 has higher cleavage efficiency for K48 and K63 poly-ubiquitin than linear ubiquitin chain (M1-Ub4), but no activity on various ubiquitin-like modifiers. The mutation of C98 and H234 residues eliminated the deubiquitinating activity of UL36-DUB. D232A mutation impacted, but did not eliminated UL36(480) activity. The Ub-Br probe can bind to wild type UL36-DUB and mutants UL36(480)H234A and UL36(480)D232A, but not C98 mutants. These in vitro results suggested that the C98 and H234 are essential catalytic residues of UL36-DUB. UL36-DUB exhibited a strict substrate specificity. Inhibition assay revealed that UL36-DUB exhibits resistance to the Roche protease inhibitor cocktail and serine protease inhibitor, but not to the Solarbio protease inhibitor cocktail. (4) Conclusions: UL36-DUB exhibited a strict substrate preference, and the protocol developed in the current study for obtaining active UL36-DUB protein should promote the high-throughput screening of UL36 inhibitors and the study on the function of MDV-encoded UL36.
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Affiliation(s)
- Junyan Lin
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China; (J.L.); (Y.A.); (H.Z.); (Y.L.); (M.W.); (J.X.)
| | - Yongxing Ai
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China; (J.L.); (Y.A.); (H.Z.); (Y.L.); (M.W.); (J.X.)
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Institute of Zoonosis, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China
| | - Hongda Zhou
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China; (J.L.); (Y.A.); (H.Z.); (Y.L.); (M.W.); (J.X.)
| | - Yan Lv
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China; (J.L.); (Y.A.); (H.Z.); (Y.L.); (M.W.); (J.X.)
| | - Menghan Wang
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China; (J.L.); (Y.A.); (H.Z.); (Y.L.); (M.W.); (J.X.)
| | - Jiacui Xu
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China; (J.L.); (Y.A.); (H.Z.); (Y.L.); (M.W.); (J.X.)
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Institute of Zoonosis, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China
| | - Cong Yu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Avenue, Changchun 130022, Jilin, China;
| | - Huanmin Zhang
- Avian Disease and Oncology Laboratory, Agriculture Research Service, United States Department of Agriculture, 4279 East Mount Hope Road East Lansing, MI 48823, USA
| | - Mengyun Wang
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China; (J.L.); (Y.A.); (H.Z.); (Y.L.); (M.W.); (J.X.)
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He Y, Han B, Ding Y, Zhang H, Chang S, Zhang L, Zhao C, Yang N, Song J. Linc-GALMD1 Regulates Viral Gene Expression in the Chicken. Front Genet 2019; 10:1122. [PMID: 31798630 PMCID: PMC6868033 DOI: 10.3389/fgene.2019.01122] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 10/16/2019] [Indexed: 12/17/2022] Open
Abstract
A rapidly increasing number of reports on dysregulated long intergenic non-coding RNA (lincRNA) expression across numerous types of cancers indicates that aberrant lincRNA expression may be a major contributor to tumorigenesis. Marek’s disease (MD) is a T cell lymphoma of chickens induced by Marek’s disease virus (MDV). Although we have investigated the roles of lincRNAs in bursa tissue of MDV-infected chickens in previous studies, the molecular mechanisms of lincRNA functions in T cells remain poorly understood. In the present study, Linc-GALMD1 was identified from CD4+ T cells and MSB1 cells, and its expression was significantly downregulated in MD-resistant line of birds in response to MDV challenge. Furthermore, loss-of-function experiments indicated that linc-GALMD1 significantly affected the expression of 290 genes in trans. Through integrated analysis of differentially expressed genes (DEGs) induced by MDV and linc-GALMD1, we found that IGLL1 gene expression levels had a positive correlation with the degree of MD infection and could potentially serve as an indicator for clinical diagnosis of MD. Moreover, an interaction between MDV and linc-GALMD1 was also observed. Accordingly, chicken embryonic fibroblast cells were inoculated with MDV with and without the linc-GALMD1 knockdown, and the data showed that linc-GALMD1 could repress MDV gene expression during the course of MDV infection. These findings uncovered a role of linc-GALMD1 as a viral gene regulator and suggested a function of linc-GALMD1 contributing to tumor suppression by coordinating expression of MDV genes and tumor-related genes and regulating immune responses to MDV infection.
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Affiliation(s)
- Yanghua He
- Department of Human Nutrition, Food and Animal Sciences, University of Hawaii at Manoa, Honolulu, HI, United States
| | - Bo Han
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, United States.,National Engineering Laboratory for Animal Breeding, Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yi Ding
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, United States
| | - Huanmin Zhang
- Avian Disease and Oncology Laboratory, Agricultural Research Service, USDA, East Lansing, MI, United States
| | - Shuang Chang
- Avian Disease and Oncology Laboratory, Agricultural Research Service, USDA, East Lansing, MI, United States.,College of Veterinary Medicine, Shandong Agricultural University, Tai'an, China
| | - Li Zhang
- Institute of Animal Science and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Chunfang Zhao
- National Engineering Laboratory for Animal Breeding, Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Ning Yang
- National Engineering Laboratory for Animal Breeding, Department of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Jiuzhou Song
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, United States
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21
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Abaidullah M, Peng S, Kamran M, Song X, Yin Z. Current Findings on Gut Microbiota Mediated Immune Modulation against Viral Diseases in Chicken. Viruses 2019; 11:v11080681. [PMID: 31349568 PMCID: PMC6722953 DOI: 10.3390/v11080681] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 07/15/2019] [Accepted: 07/19/2019] [Indexed: 02/07/2023] Open
Abstract
Chicken gastrointestinal tract is an important site of immune cell development that not only regulates gut microbiota but also maintains extra-intestinal immunity. Recent studies have emphasized the important roles of gut microbiota in shaping immunity against viral diseases in chicken. Microbial diversity and its integrity are the key elements for deriving immunity against invading viral pathogens. Commensal bacteria provide protection against pathogens through direct competition and by the production of antibodies and activation of different cytokines to modulate innate and adaptive immune responses. There are few economically important viral diseases of chicken that perturb the intestinal microbiota diversity. Disruption of microbial homeostasis (dysbiosis) associates with a variety of pathological states, which facilitate the establishment of acute viral infections in chickens. In this review, we summarize the calibrated interactions among the microbiota mediated immune modulation through the production of different interferons (IFNs) ILs, and virus-specific IgA and IgG, and their impact on the severity of viral infections in chickens. Here, it also shows that acute viral infection diminishes commensal bacteria such as Lactobacillus, Bifidobacterium, Firmicutes, and Blautia spp. populations and enhances the colonization of pathobionts, including E. coli, Shigella, and Clostridial spp., in infected chickens.
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Affiliation(s)
- Muhammad Abaidullah
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Shuwei Peng
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Muhammad Kamran
- Queensland Alliance for Agriculture and food Innovation, The University of Queensland, Brisbane 4072, Australia
| | - Xu Song
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhongqiong Yin
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.
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22
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Chu Q, Ding Y, Cai W, Liu L, Zhang H, Song J. Marek's Disease Virus Infection Induced Mitochondria Changes in Chickens. Int J Mol Sci 2019; 20:ijms20133150. [PMID: 31252692 PMCID: PMC6651546 DOI: 10.3390/ijms20133150] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/24/2019] [Accepted: 06/26/2019] [Indexed: 11/16/2022] Open
Abstract
Mitochondria are crucial cellular organelles in eukaryotes and participate in many cell processes including immune response, growth development, and tumorigenesis. Marek’s disease (MD), caused by an avian alpha-herpesvirus Marek’s disease virus (MDV), is characterized with lymphomas and immunosuppression. In this research, we hypothesize that mitochondria may play roles in response to MDV infection. To test it, mitochondrial DNA (mtDNA) abundance and gene expression in immune organs were examined in two well-defined and highly inbred lines of chickens, the MD-susceptible line 72 and the MD-resistant line 63. We found that mitochondrial DNA contents decreased significantly at the transformation phase in spleen of the MD-susceptible line 72 birds in contrast to the MD-resistant line 63. The mtDNA-genes and the nucleus-genes relevant to mtDNA maintenance and transcription, however, were significantly up-regulated. Interestingly, we found that POLG2 might play a potential role that led to the imbalance of mtDNA copy number and gene expression alteration. MDV infection induced imbalance of mitochondrial contents and gene expression, demonstrating the indispensability of mitochondria in virus-induced cell transformation and subsequent lymphoma formation, such as MD development in chicken. This is the first report on relationship between virus infection and mitochondria in chicken, which provides important insights into the understanding on pathogenesis and tumorigenesis due to viral infection.
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Affiliation(s)
- Qin Chu
- Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100094, China
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20740, USA
| | - Yi Ding
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20740, USA
| | - Wentao Cai
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20740, USA
| | - Lei Liu
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20740, USA
| | - Huanmin Zhang
- USDA, Agriculture Research Service, Avian Disease and Oncology Laboratory, East Lansing, MI 48823, USA
| | - Jiuzhou Song
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20740, USA.
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23
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Banlunara W, Techangamsuwan S, Pirarat N, Kaewamatawong T, Piewbang C, Kesdangsakonwut S, Haetrakul T, Singkhum N, Chansue N, Miller M, Lombardini E. Epizootic of multi-centric, squamous cell carcinomas in populations of Indo-Pacific humpbacked dolphins Sousa chinensis in Thai waters. DISEASES OF AQUATIC ORGANISMS 2019; 134:99-106. [PMID: 31043577 DOI: 10.3354/dao03346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Over the span of several years, 3 Indo-Pacific humpbacked dolphins died and were necropsied in Thailand. These 3 animals were all captive-bred at Oasis Sea World (Chanthaburi, Thailand), and displayed similar macroscopic progressive cutaneous lesions diagnosed as squamous cell carcinomas. In 2 of the 3 animals, necropsy revealed a severe fibrinosuppurative tracheitis and pneumonia secondary to metastasis of a cutaneous squamous cell carcinoma which extended from the head throughout the trunk and flippers. The tumors were characterized by coalescing botryoid masses with severe areas of cutaneous erosion, ulceration and necrohemorrhagic dermatitis. There was evidence of metastasis to the lungs and hilar lymph nodes. Necropsy of the third animal revealed similar progressive cutaneous squamous cell carcinomas but without evidence of metastasis. DNA molecular analysis of homogenized neoplastic tissue was conducted using polymerase chain reaction for both herpesvirus and papillomavirus in 2 of the 3 cases. In the first case, the tissues were positive for a herpesvirus alone, and this was phylogenetically classified as an alphaherpesvirus. This new herpesvirus has been tentatively named Sousa chinensis alphaherpesvirus. The second animal was negative for this novel herpesvirus and the third was not analyzed. In addition to the captive population, there is photographic evidence from 2 separate wild populations of Indo-Pacific humpbacked dolphins in the Gulf of Thailand, of a macroscopically identical proliferative and ulcerative process suspected to be squamous cell carcinomas.
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Affiliation(s)
- Wijit Banlunara
- STAR Wildlife, Exotic and Aquatic Pathology, Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
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24
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Zhou X, Wu S, Zhou H, Wang M, Wang M, Lü Y, Cheng Z, Xu J, Ai Y. Marek's Disease Virus Regulates the Ubiquitylome of Chicken CD4 + T Cells to Promote Tumorigenesis. Int J Mol Sci 2019; 20:E2089. [PMID: 31035338 PMCID: PMC6539122 DOI: 10.3390/ijms20092089] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 04/23/2019] [Accepted: 04/26/2019] [Indexed: 12/19/2022] Open
Abstract
Ubiquitination and deubiquitination of cellular proteins are reciprocal reactions catalyzed by ubiquitination-related enzymes and deubiquitinase (DUB) which regulate almost all cellular processes. Marek's disease virus (MDV) encodes a viral DUB that plays an important role in the MDV pathogenicity. Chicken CD4+ T-cell lymphoma induced by MDV is a key contributor to multiple visceral tumors and immunosuppression of chickens with Marek's disease (MD). However, alterations in the ubiquitylome of MDV-induced T lymphoma cells are still unclear. In this study, a specific antibody against K-ε-GG was used to isolate ubiquitinated peptides from CD4+ T cells and MD T lymphoma cells. Mass spectrometry was used to compare and analyze alterations in the ubiquitylome. Our results showed that the ubiquitination of 717 and 778 proteins was significantly up- and downregulated, respectively, in T lymphoma cells. MDV up- and downregulated ubiquitination of a similar percentage of proteins. The ubiquitination of transferases, especially serine/threonine kinases, was the main regulatory target of MDV. Compared with CD4+ T cells of the control group, MDV mainly altered the ubiquitylome associated with the signal transduction, immune system, cancer, and infectious disease pathways in T lymphoma cells. In these pathways, the ubiquitination of CDK1, IL-18, PRKCB, ETV6, and EST1 proteins was significantly up- or downregulated as shown by immunoblotting. The current study revealed that the MDV infection could exert a significant influence on the ubiquitylome of CD4+ T cells.
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Affiliation(s)
- Xiaolu Zhou
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China.
| | - Shanli Wu
- College of Basic Medical Sciences, Jilin University, 126 Xin Min Avenue, Changchun 130021, Jilin, China.
| | - Hongda Zhou
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China.
| | - Mengyun Wang
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China.
| | - Menghan Wang
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China.
| | - Yan Lü
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China.
| | - Zhongyi Cheng
- Jingjie PTM Biolabs Co. Ltd., 452 6th Street, Hangzhou Eco. & Tech. Developmental Area, Hangzhou 310018, Zhejiang, China.
| | - Jiacui Xu
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China.
| | - Yongxing Ai
- College of Animal Science, Jilin University, 5333 Xi An Road, Changchun 130062, Jilin, China.
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25
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Marek's Disease Virus Disables the ATR-Chk1 Pathway by Activating STAT3. J Virol 2019; 93:JVI.02290-18. [PMID: 30787154 DOI: 10.1128/jvi.02290-18] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 02/12/2019] [Indexed: 01/05/2023] Open
Abstract
Oncogenic virus replication often leads to genomic instability, causing DNA damage and inducing the DNA damage response (DDR) pathway. The DDR pathway is a cellular pathway that senses DNA damage and regulates the cell cycle to maintain genomic stability. Therefore, the DDR pathway is critical for the viral lifecycle and tumorigenesis. Marek's disease virus (MDV), an alphaherpesvirus that causes lymphoma in chickens, has been shown to induce DNA damage in infected cells. However, the interaction between MDV and the host DDR is unclear. In this study, we observed that MDV infection causes DNA strand breakage in chicken fibroblast (CEF) cells along with an increase in the DNA damage markers p53 and p21. Interestingly, we showed that phosphorylation of STAT3 was increased during MDV infection, concomitantly with a decrease of Chk1 phosphorylation. In addition, we found that MDV infection was enhanced by VE-821, an ATR-specific inhibitor, but attenuated by hydroxyurea, an ATR activator. Moreover, inhibition of STAT3 phosphorylation by Stattic eliminates the ability of MDV to inhibit Chk1 phosphorylation. Finally, we showed that MDV replication was decreased by Stattic treatment. Taken together, these results suggest that MDV disables the ATR-Chk1 pathway through STAT3 activation to benefit its replication.IMPORTANCE MDV is used as a biomedical model to study virus-induced lymphoma due to the similar genomic structures and physiological characteristics of MDV and human herpesviruses. Upon infection, MDV induces DNA damage, which may activate the DDR pathway. The DDR pathway has a dual impact on viruses because it manipulates repair and recombination factors to facilitate viral replication and also initiates antiviral action by regulating other signaling pathways. Many DNA viruses evolve to manipulate the DDR pathway to promote virus replication. In this study, we identified a mechanism used by MDV to inhibit ATR-Chk1 pathways. ATR is a cellular kinase that responds to broken single-stranded DNA, which has been less studied in MDV infection. Our results suggest that MDV infection activates STAT3 to disable the ATR-Chk1 pathway, which is conducive to viral replication. This finding provides new insight into the role of STAT3 in interrupting the ATR-Chk1 pathway during MDV replication.
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26
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Torres ACD, Marin SY, Costa CS, Martins NRS. An Overview on Marek’s Disease Virus Evolution and Evidence for Increased Virulence in Brazil. BRAZILIAN JOURNAL OF POULTRY SCIENCE 2019. [DOI: 10.1590/1806-9061-2018-0870] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- ACD Torres
- Universidade Federal de Minas Gerais, Brazil
| | - SY Marin
- Universidade Federal de Minas Gerais, Brazil
| | - CS Costa
- Universidade Federal de Minas Gerais, Brazil
| | - NRS Martins
- Universidade Federal de Minas Gerais, Brazil
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27
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McPherson MC, Cheng HH, Smith JM, Delany ME. Vaccination and Host Marek's Disease-Resistance Genotype Significantly Reduce Oncogenic Gallid alphaherpesvirus 2 Telomere Integration in Host Birds. Cytogenet Genome Res 2018; 156:204-214. [PMID: 30572327 PMCID: PMC7448376 DOI: 10.1159/000495174] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/14/2018] [Indexed: 01/20/2023] Open
Abstract
Marek's disease (MD) is an infectious disease characterized by lymphomas and high mortality in susceptible chickens. The causative and ubiquitous alpha-herpesvirus known as MD virus (MDV) integrates into host telomeres during early infection through latency, known to be an important phase for oncogenic transformation. Herein, we sought to determine the influence of vaccination and host genetics on the temporal dynamics of MDV-host genome interactions. We studied integration profiles using 2 MD vaccines that vary in protective efficacy in 2 genetic lines that differ in MD resistance/susceptibility. Virus integration of both oncogenic MDV and vaccine strains was observed in both MD susceptible and resistant birds, however, the lines differed in their dynamic telomere-integration profiles. Notably, the resistant host genotype exhibited a smaller percentage of replicating cells with the virus telomere-integrated only phenotype as compared to the susceptible genotype. Vaccination with Rispens, the most protective MD vaccine, also reduced the establishment of the virus telomere-integrated only phenotype, suggesting a significant role of the phenotype in MD lymphoma development. The effect of Rispens vaccination was most dramatic in the susceptible genotype. These results suggest important connections between vaccinal immunity, MDV telomere integration, virus-induced oncogenesis, and virus-host genome interactions in the context of host genetics and disease susceptibility.
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Affiliation(s)
- Marla C. McPherson
- Department of Animal Science, University of California, Davis, CA
- Department of Surgery, Stanford University School of Medicine, Stanford, CA
| | - Hans H. Cheng
- USDA, ARS, Avian Disease and Oncology Laboratory, East Lansing, MI, USA
| | - Justin M. Smith
- Department of Animal Science, University of California, Davis, CA
| | - Mary E. Delany
- Department of Animal Science, University of California, Davis, CA
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28
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Shaheen HA, Hussein HA, Elsafty MM, Shalaby MA. Genetic resistance of eight native Egyptian chicken breeds having chicken B-cell marker 6 gene post-challenge with field strain of Marek's disease-induced tumor virus. Vet World 2018; 11:1510-1515. [PMID: 30532510 PMCID: PMC6247869 DOI: 10.14202/vetworld.2018.1510-1515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Accepted: 09/24/2018] [Indexed: 11/16/2022] Open
Abstract
Aim: The aim of this work was to detect chicken B-cell marker 6 (ChB6) gene in some native breeds in Egypt and find the relationship between founded genes in these different breeds to determine the resistance of native Egyptian breeds of chicken to Marek’s disease (MD). Materials and Methods: A total of 14 different chicken breeds (30 each) including ten native breeds in addition to SPF Lohmann, High Line, Bovans, and Roodiland were used. Blood samples were collected for the detection of (ChB6) by polymerase chain reaction (PCR) assay and sequenced to determine the presence or absence of ChB6 gene. Experimental infection was done using local field isolated MD virus (MDV) of 11 (1 day old) unvaccinated chick breeds having no maternal antibodies against MDV. Ten breeds of them carry ChB6 gene, eight breeds were native, and the rest two breeds were SPF Lohmann and High Line in addition to a group of ChB6 gene-lacking breed (Bovans) were infected. Spleen samples were collected from all infected breeds at 20th, 25th, 30th, 35th, and 40th weeks post-infection and tested by PCR assay for the detection of MDV. Furthermore, at 40th week post-infection, tumorized spleen sample of Bovans breed was collected and prepared for examination by transmission electron microscope (TEM) to confirm the presence of MDV. Results: Our results revealed the positivity of 10 out of 14 breeds (Gimmizah, Sinai, Dandarawi, Fayoumi, Golden Montazah, Matrouh, Beheri, Dokki, SPF Lohmann, and High Line) to the presence of ChB6 gene and resistance to MDV infection, while the Bovans, Mandarah, Inshas and Roodiland breeds lack the ChB6 gene and are susceptible to MDV infection. The collected spleen samples revealed negative for the presence of challenged MDV by PCR in 10 breeds (Gimmizah, Sinai, Dandarawi, Fayoumi, Golden Montazah, Matrouh, Beheri, Dokki, SPF Lohmann, and High Line) and positive for Bovans breed. TEM is used to confirm MDV infection in Bovans group which demonstrated tumors. Conclusion: The study confirms the relationship between the presence of ChB6 gene in our native breeds and the absence of tumors.
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Affiliation(s)
- Hala A Shaheen
- Central Laboratory for Evaluation of Veterinary Biologics, Cairo, Egypt
| | - H A Hussein
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - M M Elsafty
- Central Laboratory for Evaluation of Veterinary Biologics, Cairo, Egypt
| | - M A Shalaby
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
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29
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Induction of DNA Damages upon Marek's Disease Virus Infection: Implication in Viral Replication and Pathogenesis. J Virol 2017; 91:JVI.01658-17. [PMID: 28978699 DOI: 10.1128/jvi.01658-17] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 09/26/2017] [Indexed: 12/23/2022] Open
Abstract
Marek's disease virus (MDV) is a highly contagious alphaherpesvirus that infects chickens and causes a deadly neoplastic disease. We previously demonstrated that MDV infection arrests cells in S phase and that the tegument protein VP22 plays a major role in this process. In addition, expression of VP22 induces double-strand breaks (DSBs) in the cellular DNA, suggesting that DNA damage and the associated cellular response might be favorable for the MDV life cycle. Here, we addressed the role of DNA damage in MDV replication and pathogenesis. We demonstrated that MDV induces DSBs during lytic infection in vitro and in the peripheral blood mononuclear cells of infected animals. Intriguingly, we did not observe DNA damage in latently infected MDV-induced lymphoblastoid cells, while MDV reactivation resulted in the onset of DNA lesions, suggesting that DNA damage and/or the resulting DNA damage response might be required for efficient MDV replication and reactivation. In addition, reactivation was significantly enhanced by the induction of DNA damage using a number of chemicals. Finally, we used recombinant viruses to show that VP22 is required for the induction of DNA damage in vivo and that this likely contributes to viral oncogenesis.IMPORTANCE Marek's disease virus is an oncogenic alphaherpesvirus that causes fatal T-cell lymphomas in chickens. MDV causes substantial losses in the poultry industry and is also used in small-animal models for virus-induced tumor formation. DNA damage not only is implicated in tumor development but also aids in the life cycle of several viruses; however, its role in MDV replication, latency, and reactivation remains elusive. Here, we demonstrate that MDV induces DNA lesions during lytic replication in vitro and in vivo DNA damage was not observed in latently infected cells; however, it was reinitiated during reactivation. Reactivation was significantly enhanced by the induction of DNA damage. Recombinant viruses that lacked the ability to induce DNA damage were defective in their ability to induce tumors, suggesting that DNA damage might also contribute to cellular transformation processes leading to MDV lymphomagenesis.
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30
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Li J, He L, Zhang Y, Xue C, Cao Y. A novel method for genome-wide profiling of dynamic host-pathogen interactions using 3' end enriched RNA-seq. Sci Rep 2017; 7:8681. [PMID: 28819105 PMCID: PMC5561256 DOI: 10.1038/s41598-017-08700-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 07/13/2017] [Indexed: 12/20/2022] Open
Abstract
Marek's disease is a contagious lymphoproliferative disease of chickens and typical model of viral oncogenesis. Mapping changes or different states over the course of infection for both host and pathogen would provide important insights into dynamic host-pathogen interactions. Here we introduced 3' end enriched RNA-seq as a novel method to study host-pathogen interactions in chicken embryo fibroblasts cells challenged with Marek's disease virus. The method allowed accurate profiling of gene expression and alternative polyadenylation sites for host and pathogen simultaneously. We totally identified 476 differentially expressed genes and 437 APA switching genes in host, including switching in tandem 3' UTRs and switching between coding region and 3' UTR. Most of these genes were related to innate immunity, apoptosis and metabolism, but two sets of genes overlapped a little, suggesting two complementary mechanisms in gene regulation during MDV infection. In summary, our results provided a relatively comprehensive insight into dynamic host-pathogen interactions in regulation of gene transcription during infection of Marek's disease virus and suggested that 3' end enriched RNA-seq was a promising method to investigate global host-pathogen interactions.
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Affiliation(s)
- Jie Li
- State Key Laboratory of Biocontrol, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, College of Life Sciences, Sun Yat-sen University, Guangzhou, People's Republic of China.,Guangdong Wen's Foodstuffs Group Co., Ltd. Yunfu, Guangdong, China
| | - Liangliang He
- State Key Laboratory of Biocontrol, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, College of Life Sciences, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Yun Zhang
- State Key Laboratory of Biocontrol, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, College of Life Sciences, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Chunyi Xue
- State Key Laboratory of Biocontrol, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, College of Life Sciences, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Yongchang Cao
- State Key Laboratory of Biocontrol, Guangdong Province Key Laboratory of Pharmaceutical Functional Genes, College of Life Sciences, Sun Yat-sen University, Guangzhou, People's Republic of China.
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