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Jiang B, Zhang W, Hu T, He Y, Wu Z, Wang M, Jia R, Zhu D, Liu M, Zhao X, Yang Q, Wu Y, Zhang S, Huang J, Mao S, Ou X, Sun D, Zhang L, Yu Y, Pan X, Zhong J, Cheng A, Chen S. E-M349E and NS2A/2B-P1(T) are compensatory mutations of rDTMUV-NS2AB-P1P1'(AA), which regain virus proliferation by enhancing the virus package and restoring NS2A/2B cleavage. Virology 2024; 595:110084. [PMID: 38692132 DOI: 10.1016/j.virol.2024.110084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 03/18/2024] [Accepted: 04/03/2024] [Indexed: 05/03/2024]
Abstract
Duck Tembusu virus (DTMUV) belongs to the Flaviviridae family and mainly infects ducks. The genome of DTMUV is translated into a polyprotein, which is further cleaved into several protein by viral NS2B3 protease and host proteases. Crucially, the cleavage of the NS2A/2B precursor during this process is essential for the formation of replication complexes and viral packaging. Previous research has demonstrated that alanine mutations in NS2A/2B (P1P1' (AA)) result in an attenuated strain (rDTMUV-NS2A/2B-P1P1' (AA)) by disrupting NS2A/2B cleavage. In this study, we investigate the effects of the P1P1' (AA) mutation on the viral life cycle and explore compensatory mutations in rDTMUV-NS2A/2B-P1P1' (AA). Infected ducklings exhibit similar body weight gain and viral tissue loads to DTMUV-WT. Compensatory mutations E-M349E and P1(T) emerge, restoring proliferation levels to those of rDTMUV-WT. Specifically, E-M349E enhances viral packaging, while P1(T) reinstates NS2A/2B proteolysis in vitro. Thus, our findings reveal novel compensatory sites capable of restoring the attenuated DTMUV during polyprotein cleavage and packaging.
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Affiliation(s)
- Bowen Jiang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Wei Zhang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Tao Hu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Yu He
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Zhen Wu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Mingshu Wang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Renyong Jia
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Dekang Zhu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Mafeng Liu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Xinxin Zhao
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Qiao Yang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Ying Wu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Shaqiu Zhang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Juan Huang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Sai Mao
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Xumin Ou
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Di Sun
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Ling Zhang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - YanLing Yu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Xin Pan
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Jingyi Zhong
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Anchun Cheng
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
| | - Shun Chen
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
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Huang Y, Zhang Y, Yang S, Shi Y, Chu X, Ahmed N, Wu J, Chen Q. Tembusu virus induced apoptosis in vacuolate spermatogenic cells is mediated by Cytc-mediated mitochondrial apoptotic signaling pathway. Theriogenology 2024; 215:312-320. [PMID: 38128224 DOI: 10.1016/j.theriogenology.2023.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/08/2023] [Accepted: 12/11/2023] [Indexed: 12/23/2023]
Abstract
Duck Tembusu virus (DTMUV) is an emerging mosquito-borne flavivirus that infects mainly poultry and has caused huge economic losses to the poultry farming industry in China. Also known as duck hemorrhagic ovarian disease, DTMUV principally destroys ovarian tissue in ducks, causing a dramatic drop in egg production. and can also invade the male reproductive system causing lesions. Currently, little research has been done to reveal the underlying mechanisms of reproductive dysfunction in ducks caused by DTMUV infection. In this study, histopathological analysis and electron microscopy of testes of ducks infected with DTMUV showed that DTMUV caused testicular atrophy and cytoplasmic vacuolation in ducks. Terminal Deoxynucleotidyl Transferase-Mediated Nick-End Labeling (TUNEL) staining and real-time quantitative PCR(RT-qPCR) results further indicated that DTMUV induced spermatogenic cells apoptosis. After DTMUV infection, a large amount of cytochrome c(Cytc) was released from the mitochondrial matrix into the cytoplasm, activating downstream target proteins and causing apoptosis. To sum up, DTMUV induces spermatogenic cell apoptosis through the Cytc-induced mitochondrial apoptosis pathway, our study provides evidence for DTMUV infection-induced male reproductive disorders.
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Affiliation(s)
- Yufei Huang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, PR China; Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu Province, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu Province, 225009, PR China
| | - Yafei Zhang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, PR China
| | - Sheng Yang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, PR China; Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu Province, 225009, PR China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, Jiangsu Province, 225009, PR China
| | - Yonghong Shi
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, PR China; Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, PR China
| | - Xiaoya Chu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, PR China
| | - Nisar Ahmed
- Lasbela University of Agriculture, Water and Marine Sciences, Faculty of Veterinary & Animal Sciences, PR China
| | - Jingxian Wu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, PR China
| | - Qiusheng Chen
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, PR China.
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Hu F, Zhu T, Guo X, Yu K, Ma X, Liu C, Liu L, Gao Y, Song M, Wu J, Huang B, Li Y. Generation of duck Tembusu virus using a simple reverse genetic system in duck embryo fibroblast cells. J Virol Methods 2021; 300:114385. [PMID: 34843824 DOI: 10.1016/j.jviromet.2021.114385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 09/04/2021] [Accepted: 11/25/2021] [Indexed: 11/25/2022]
Abstract
Outbreaks of duck Tembusu virus (DTMUV) have caused serious economic losses in China since 2010. In this study, an infectious clone of the DTMUV BZ-2010strain, isolated from layer cherry duck in China, was constructed using the bacterium-free infectious subgenomic-amplicons method. The subgenomic-amplicons of the human cytomegalovirus promoter (pCMV) at the 5' terminus of the first DNA fragment, the entire genome of DTMUV, and the hepatitis delta ribozyme followed by the simian virus 40 polyadenylation signal (HDR/SV40pA) at the 3' terminus of the last DNA fragment were synthesized and amplified by PCR in three DNA fragments. The pCMV and HDR/SV40pA were used to drive the viral RNA transcription and generate a full-length RNA transcript of the virus, and were found to be effective in reassembling DTMUV in duck embryo fibroblast cells. The RNA transcripts from the infection clone were infectious in duck embryo fibroblast cells, generating the reconstituted DTMUV. This study provided a valuable reverse genetic tool for the further study DTMUV pathogenesis.
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Affiliation(s)
- Feng Hu
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
| | - Tong Zhu
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
| | - Xiaozhen Guo
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
| | - Kexiang Yu
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
| | - Xiuli Ma
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
| | - Cunxia Liu
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
| | - Liping Liu
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
| | - Yuehua Gao
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
| | - Minxun Song
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
| | - Jiaqiang Wu
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
| | - Bing Huang
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
| | - Yufeng Li
- Institute of Poultry Science, Shandong Academy of Agricultural Sciences / Shandong Provincial Key Laboratory of Immunity and Diagnosis of Poultry Diseases, No. 1 Jiaoxiao Road, Jinan, Shandong, 250023, China.
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Han K, Zhao D, Liu Y, Liu Q, Huang X, Yang J, Zhang L, Li Y. The ubiquitin-proteasome system is necessary for the replication of duck Tembusu virus. Microb Pathog 2019; 132:362-368. [PMID: 31054366 PMCID: PMC7126904 DOI: 10.1016/j.micpath.2019.04.044] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 04/18/2019] [Accepted: 04/30/2019] [Indexed: 01/18/2023]
Abstract
Duck Tembusu virus (DTMUV) is a newly emerging pathogenic flavivirus that has caused massive economic losses to the duck industry in China. The cellular factors required for DTMUV replication have been poorly studied. The ubiquitin-proteasome system (UPS), the major intracellular proteolytic pathway, mediates diverse cellular processes, including endocytosis and signal transduction, which may be involved in the entry of virus. In the present study, we explored the interplay between DTMUV replication and the UPS in BHK-21 cells and found that treatment with proteasome inhibitor (MG132 and lactacystin) significantly decreased the DTMUV progency at the early infection stage. We further revealed that inhibition of the UPS mainly occurs on the level of viral protein expression and RNA transcription. In addition, using specific siRNAs targeting ubiquitin reduces the production of viral progeny. In the presence of MG132 the staining for the envelope protein of DTMUV was dramatically reduced in comparison with the untreated control cells. Overall, our observations reveal an important role of the UPS in multiple steps of the DTMUV infection cycle and identify the UPS as a potential drug target to modulate the impact of DTMUV infection. Treatment with proteasome inhibitor significantly decreased the DTMUV progency. Inhibition of the UPS mainly occurs on the level of viral protein expression and RNA transcription. Inhibit the expression of ubiquitin reduces the production of viral progeny.
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Affiliation(s)
- Kaikai Han
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, PR China
| | - Dongmin Zhao
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, PR China
| | - Yuzhuo Liu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, PR China
| | - Qingtao Liu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, PR China
| | - Xinmei Huang
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, PR China
| | - Jing Yang
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, PR China
| | - Lijiao Zhang
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, PR China
| | - Yin Li
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, PR China.
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Tang J, Bi Z, Ding M, Yin D, Zhu J, Zhang L, Miao Q, Zhu Y, Wang G, Liu G. Immunization with a suicidal DNA vaccine expressing the E glycoprotein protects ducklings against duck Tembusu virus. Virol J 2018; 15:140. [PMID: 30217161 PMCID: PMC6137926 DOI: 10.1186/s12985-018-1053-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 09/05/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUD Duck Tembusu virus (DTMUV), a pathogenic flavivirus, emerged in China since 2010 and causing huge economic loss in the Chinese poultry industry. Although several vaccines have been reported to control DTMUV disease, few effective vaccines are available and new outbreaks were continuously reported. Thus, it is urgently to develop a new effective vaccine for prevention of this disease. METHODS In this study, a suicidal DNA vaccine based on a Semliki Forest virus (SFV) replicon and DTMUV E glycoprotein gene was constructed and the efficacy of this new vaccine was assessed according to humoral and cell-mediated immune responses as well as protection against the DTMUV challenge in ducklings. RESULTS Our results showed that the recombinant SFV replicon highly expressed E glycoprotein in DEF cells. After intramuscular injection of this new DNA vaccine in ducklings, robust humoral and cellular immune responses were observed in all immunized ducklings. Moreover, all ducklings were protected against challenge with the virulent DTMUV AH-F10 strain. CONCLUSIONS In conclusion, we demonstrate that this suicidal DNA vaccine is a promising candidate facilitating the prevention of DTMUV infection.
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Affiliation(s)
- Jingyu Tang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.,Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518 Ziyue Rd, Shanghai, 200241, China
| | - Zhuangli Bi
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.,Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518 Ziyue Rd, Shanghai, 200241, China
| | - Mingyang Ding
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518 Ziyue Rd, Shanghai, 200241, China
| | - Dongdong Yin
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.,Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Hefei, 230036, China
| | - Jie Zhu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518 Ziyue Rd, Shanghai, 200241, China
| | - Li Zhang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.,Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518 Ziyue Rd, Shanghai, 200241, China
| | - Qiuhong Miao
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518 Ziyue Rd, Shanghai, 200241, China
| | - Yingqi Zhu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.,Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518 Ziyue Rd, Shanghai, 200241, China
| | - Guijun Wang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China. .,Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Hefei, 230036, China.
| | - Guangqing Liu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518 Ziyue Rd, Shanghai, 200241, China.
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