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Ren X, Li P, Li X, Qian P. Epidemiological and genetic characteristics of foot-and-mouth disease virus in China from 2010 to 2022. Virology 2024; 589:109940. [PMID: 37984153 DOI: 10.1016/j.virol.2023.109940] [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: 07/05/2023] [Revised: 10/26/2023] [Accepted: 11/08/2023] [Indexed: 11/22/2023]
Abstract
Foot-and-mouth disease virus (FMDV) is a highly contagious picornavirus that can infect cloven-hoofed animals of significant agricultural importance. In China, foot-and-mouth disease (FMD) epidemics occur annually, resulting in localized outbreaks or sporadic epidemics that cause significant economic losses. This study summarized 123 cases of FMD reported in China between 2010 and 2022, using data from the official website of the Chinese Center for Animal Disease Control and Prevention. The epidemic situation and genetic characteristics of FMDV in China were studied through phylogenetic analysis, amino acid variation analysis of antigenic epitopes, and genetic recombination analysis. The findings provide important references for predicting the FMDV epidemic situation in China, developing vaccines, and effectively preventing and controlling FMD.
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Affiliation(s)
- Xujiao Ren
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, Hubei, China; CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, 100101, China
| | - Pengfei Li
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, Hubei, China
| | - Xiangmin Li
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, Hubei, China
| | - Ping Qian
- National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, Hubei, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, Hubei, China.
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Nguyen NH, Nguyen TQ, Lai DC, Nguyen Thi MD, Nguyen MN. Phylogenetic and genotypic characteristics of the foot-and-mouth disease virus from outbreaks in southern Vietnam, 2019. Virology 2023; 582:43-47. [PMID: 37004382 DOI: 10.1016/j.virol.2023.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 03/16/2023] [Accepted: 03/22/2023] [Indexed: 04/03/2023]
Abstract
In 2019, multiple FMD outbreaks occurred in swine farms vaccinated against FMDV in southern Vietnam. This study investigated the genotypic characteristics of FMDV strains from these outbreaks. Seven samples were collected from pigs exhibiting FMD clinical signs. All FMDV-positive samples were amplified and sequenced for the gene encoding the VP1. Results were analyzed and compared with sequences of reference strains and vaccine strains on GenBank. Phylogenetic analysis showed that all seven field isolates belonged to serotype O, topotype SEA/Mya-98. These strains shared high homology with strains from Vietnam (2018), Korea, and China, but low homology with vaccine strains. Moreover, 21 amino acid substitutions were found in the VP1 protein of the FMDV field strains, many of which were crucial antigenic determinants involved in the neutralization of FMDV. These findings suggest that the current vaccine may not be effective against the emerging FMDV strains in southern Vietnam.
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Affiliation(s)
- Ngoc Hai Nguyen
- Department of Infectious Disease and Veterinary Public Health, Faculty of Animal Husbandry and Veterinary Medicine, Nong Lam University-HCMC, Viet Nam.
| | | | - Danh Cong Lai
- Department of Infectious Disease and Veterinary Public Health, Faculty of Animal Husbandry and Veterinary Medicine, Nong Lam University-HCMC, Viet Nam
| | - My Duyen Nguyen Thi
- Department of Infectious Disease and Veterinary Public Health, Faculty of Animal Husbandry and Veterinary Medicine, Nong Lam University-HCMC, Viet Nam
| | - Minh Nam Nguyen
- Department of Biomedical Engineering, School of Medicine, Vietnam National University Ho Chi Minh City (VNU-HCM), Ho Chi Minh City, 700000, Viet Nam; Research Center for Genetics and Reproductive Health (CGRH), School of Medicine, National University HCMC, Viet Nam; Vietnam National University Ho Chi Minh City (VNU-HCM), Ho Chi Minh City, 700000, Viet Nam.
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Doosti M, Nassiri M, Nasiri K, Tahmoorespur M, Zibaee S. Effect of IL-2 co-expressed or co-inoculated with immuno-dominant epitopes from VP1 protein of FMD virus on immune responses in BALB/c mice. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2019; 22:302-309. [PMID: 31156792 PMCID: PMC6528708 DOI: 10.22038/ijbms.2019.31972.7683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Objective(s): The results of studies on vaccine development for foot-and-mouth disease (FMD) virus show that the use of inactivated vaccines for FMD virus is not completely effective. Novel vaccinations based on immuno-dominant epitopes have been shown to induce immune responses. Furthermore, for safety of immunization, access to efficient adjuvants against FMD virus seems to be critical. Materials and Methods: In this study, we produced epitope recombinant vaccines from the VP1 protein of the FMD virus for serotype O of Iran. Constructs were included polytope (tandem-repeat multiple-epitope), polytope coupled with interleukin-2 (polytope-IL 2) as a molecular adjuvant and IL-2. Three expression vectors were constructed and expressed in Escherichia coli BL21 (DE3). To evaluate whether these recombinant vaccines induce immune responses, BALB/c mice were injected with the recombinant vaccines and their immune responses were compared with a negative control group. The humoral and cellular immune responses were measured by ELISA. Results: The results showed that IL-2 co-expressed or co-inoculated with Polytope protein enhances the immune effect of multiple epitope recombinant vaccine against FMD virus. The results of total immunoglobulin G (IgG), IgG1, and IgG2a levels and secretion of interferon gamma (IFN-γ), IL-4 and IL-10 revealed that there were significant differences between negative control group and other injected mice with the recombinant vaccines (P<0.05). Conclusion: Observations indicated that the epitope recombinant plasmid of the VP1 protein co-expressed or co-inoculated with IL-2 was effective in inducing an enhanced immune response. Therefore, IL-2 can be recommended as a potential adjuvant for epitope recombinant vaccine of the VP1 protein from FMD virus.
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Affiliation(s)
- Mohammad Doosti
- Department of Animal Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mohammadreza Nassiri
- Department of Animal Science, Ferdowsi University of Mashhad, Mashhad, Iran.,Recombinant Proteins Research Group, Research Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Khadijeh Nasiri
- Department of Exercise Physiology, Faculty of Sport Science, University of Mazandaran, Babolsar, Iran
| | | | - Saeed Zibaee
- Razi Vaccine and Serum Research Institute, Mashhad, Iran
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Doosti M, Nassiri M, Nasiri K, Tahmoorespur M, Zibaee S. Immunogenic evaluation of FMD virus immuno-dominant epitopes coupled with IL-2/FcIgG in BALB/c mice. Microb Pathog 2019; 132:30-37. [PMID: 31004723 DOI: 10.1016/j.micpath.2019.04.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Revised: 11/19/2018] [Accepted: 04/10/2019] [Indexed: 12/15/2022]
Abstract
Previous studies on vaccine development against foot-and-mouth disease (FMD) virus reported that application of the inactivated vaccines for FMD virus is not completely effective. Novel vaccinations based on immune-dominant epitopes showed they induced immune responses. In addition, for better and safer immunization, access to of efficient adjuvants against FMD virus seems to be critical. In this study, we produced epitope recombinant vaccines from the VP1 protein of the FMD virus for serotype O of Iran that conjugated with Fc Immunoglobulin (FcIgG) and Interleukin-2 (IL-2). Multiple-epitope constructs included Polytope, Polytope-IL2-FcIgG, Polytope-IL2, Polytope-FcIgG that cloned and expressed in E. coli BL21 (DE3). To evaluate whether these epitope recombinant vaccines induce immune responses, BALB/c mice were injected with the epitope recombinant vaccines and their immune responses were compared with a negative control group. The humoral and cellular immune responses were measured by ELISA. The results showed there were significant differences between the negative control group and other immunized mice with recombinant epitope proteins (p < 0.05). The results of total IgG, IgG1, IgG2a levels and secretion of IFN-γ, IL-4 and IL-10 revealed that immune responses were enhanced when the epitope recombinant vaccine of FMD virus coupled with IL-2 and FcIgG. Observations indicated that the epitope recombinant plasmid of the VP1 protein co-expressed with IL-2 and FcIgG was effective in inducing an enhanced immune response. Therefore, IL-2 and FcIgG could be recommended as a potential adjuvant for epitope recombinant vaccine of the VP1 protein from FMD virus.
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Affiliation(s)
- Mohammad Doosti
- Department of Animal Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mohammadreza Nassiri
- Recombinant Proteins Research Group, Research Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran; Department of Animal Science, Ferdowsi University of Mashhad, Mashhad, Iran.
| | - Khadijeh Nasiri
- Department of Exercise Physiology, Faculty of Sport Science, University of Mazandaran, Babolsar, Iran
| | - Mojtaba Tahmoorespur
- Department of Animal Science, Ferdowsi University of Mashhad, Mashhad, Iran. https://www.researchgate.net/profile/Mojtaba_Tahmoorespur
| | - Saeed Zibaee
- Razi Vaccine and Serum Research Institute, Mashhad, Iran
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Gu Y, Sun X, Li B, Huang J, Zhan B, Zhu X. Vaccination with a Paramyosin-Based Multi-Epitope Vaccine Elicits Significant Protective Immunity against Trichinella spiralis Infection in Mice. Front Microbiol 2017; 8:1475. [PMID: 28824599 PMCID: PMC5540943 DOI: 10.3389/fmicb.2017.01475] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 07/20/2017] [Indexed: 12/14/2022] Open
Abstract
Trichinellosis is a worldwide zoonosis and remains a serious public health problem. Interrupting parasite transmission via vaccination of livestocks with a potent vaccine is a practical approach to prevent human Trichinellosis. Our previous studies have identified that paramyosin of Trichinella spiralis (Ts-Pmy) is a good vaccine candidate against Trichinellosis. In this study, a novel multi-epitope vaccine (MEP) was constructed by using four CD4+ T cell epitopes (P2, P3, P4, and P5) and one B cell epitope (YX1) from Ts-Pmy and expressed as a soluble recombinant protein (rMEP) in Escherichia coli. Mice immunized with rMEP vaccine produced significant higher muscle larval reduction (55.4%) than that induced by immunization of parental rTs-Pmy (34.4%) against T. spiralis infection. The better protection is associated with rMEP induced high levels of anti-rMEP specific IgG and subclass IgG1/IgG2a, elevated T cell proliferation of splenocytes and secretion of IFN-γ, IL-4 and IL-5. The cellular response to individual T cell epitope also showed that splenocytes from mice immunized with rMEP strongly response to the stimulation of synthetic epitope peptide P2, P3, and P4, but not to P5, suggesting that most of T cell epitopes are exposed and processed well during immunization that may contribute to the high protection induced by the immunization of rMEP. This study implies that epitope vaccine is a promising approach for the development of vaccines against Trichinellosis.
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Affiliation(s)
- Yuan Gu
- Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China
| | - Ximeng Sun
- Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China
| | - Bo Li
- Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China
| | - Jingjing Huang
- Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China
| | - Bin Zhan
- Section of Tropical Medicine, Department of Pediatrics, Baylor College of Medicine, HoustonTX, United States
| | - Xinping Zhu
- Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China
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Chang Y, Dou Y, Bao H, Luo X, Liu X, Mu K, Liu Z, Liu X, Cai X. Multiple microRNAs targeted to internal ribosome entry site against foot-and-mouth disease virus infection in vitro and in vivo. Virol J 2014; 11:1. [PMID: 24393133 PMCID: PMC3903555 DOI: 10.1186/1743-422x-11-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Accepted: 12/27/2013] [Indexed: 11/25/2022] Open
Abstract
Background Foot-and-mouth disease virus (FMDV) causes a severe vesicular disease in domestic and wild cloven-hoofed animals. Because of the limited early protection induced by current vaccines, emergency antiviral strategies to control the rapid spread of FMD outbreaks are needed. Here we constructed multiple microRNAs (miRNAs) targeting the internal ribosome entry site (IRES) element of FMDV and investigated the effect of IRES-specific miRNAs on FMDV replication in baby hamster kidney (BHK-21) cells and suckling mice. Results Four IRES-specific miRNAs significantly reduced enhanced green fluorescent protein (EGFP) expression from IRES-EGFP reporter plasmids, which were used with each miRNA expression plasmid in co-transfection of BHK-21 cells. Furthermore, treatment of BHK-21 cells with Bi-miRNA (a mixture of two miRNA expression plasmids) and Dual-miRNA (a co-cistronic expression plasmid containing two miRNA hairpin structures) induced more efficient and greater inhibition of EGFP expression than did plasmids carrying single miRNA sequences. Stably transformed BHK-21 cells and goat fibroblasts with an integrating IRES-specific Dual-miRNA were generated, and real-time quantitative RT-PCR showed that the Dual-miRNA was able to effectively inhibit the replication of FMDV (except for the Mya98 strain) in the stably transformed BHK-21 cells. The Dual-miRNA plasmid significantly delayed the deaths of suckling mice challenged with 50× and 100× the 50% lethal dose (LD50) of FMDV vaccine strains of three serotypes (O, A and Asia 1), and induced partial/complete protection against the prevalent PanAsia-1 and Mya98 strains of FMDV serotype O. Conclusion These data demonstrate that IRES-specific miRNAs can significantly inhibit FMDV infection in vitro and in vivo.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Xuepeng Cai
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, Gansu, P, R of China.
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Li C, Chen Z, Meng C, Li L, Liu G. High yield expression of duck hepatitis A virus VP1 protein in Escherichia coli, and production and characterization of polyclonal antibody. J Virol Methods 2013; 191:69-75. [PMID: 23583731 DOI: 10.1016/j.jviromet.2013.04.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 03/25/2013] [Accepted: 04/04/2013] [Indexed: 10/26/2022]
Abstract
VP1 protein, the capsid protein of duck hepatitis A virus (DHAV), contains critical epitopes for inducing a protective immune response. Due to its low-level expression in Escherichia coli (E. coli), the function of this protein is poorly characterized. In this study, a codon-optimized VP1 gene was chemically synthesized in terms of the codon usage bias in E. coli and subcloned into pET32a (+) to increase its expression. The recombinant VP1 fusion protein was purified from inclusion body by Ni(2+) affinity chromatography His-Bind Resin and used to raise the rabbit anti-DHAV-VP1 polyclonal antibody. The expression of the codon-optimized VP1 gene in E. coli was significantly increased when compared to the wild-type VP1 gene, having an at least 17-fold increase. Western blot analysis showed that the recombinant protein was recognized by the rabbit anti-DHAV polyclonal antibody. Western blot also demonstrated that the rabbit anti-DHAV-VP1 polyclonal antibody could recognize the purified VP1 fusion protein specifically, and in the indirect immunofluorescent assays (IFA), the antibody was able to probe the VP1 protein in DHAV-1 infected cells. In conclusion, codon optimization increased dramatically DHAV VP1 expression in E. coli and the His-tagged VP1 fusion protein showed good antigenicity and immunogenicity.
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Affiliation(s)
- Chuanfeng Li
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
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