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Gao S, Zuo W, Kang C, Zou Z, Zhang K, Qiu J, Shang X, Li J, Zhang Y, Zuo Q, Zhao Y, Jin M. Saccharomyces cerevisiae oral immunization in mice using multi-antigen of the African swine fever virus elicits a robust immune response. Front Immunol 2024; 15:1373656. [PMID: 38742108 PMCID: PMC11089227 DOI: 10.3389/fimmu.2024.1373656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 04/05/2024] [Indexed: 05/16/2024] Open
Abstract
African swine fever virus (ASFV) is one of the most complex viruses. ASFV is a serious threat to the global swine industry because no commercial vaccines against this virus are currently available except in Vietnam. Moreover, ASFV is highly stable in the environment and can survive in water, feed, and aerosols for a long time. ASFV is transmitted through the digestive and respiratory tract. Mucosal immunity is the first line of defense against ASFV. Saccharomyces cerevisiae (SC), which has been certified by the U.S. Food and Drug Administration and has a generally recognized as safe status in the food industry, was used for oral immunization in this study. ASFV antigens were effectively expressed in recombinant SC strains with high DNA copy numbers and stable growth though surface display technology and chromosome engineering (δ-integration). The recombinant SC strains containing eight ASFV antigens-KP177R, E183L, E199L, CP204L, E248R, EP402R, B602L, and B646L- induced strong humoral and mucosal immune responses in mice. There was no antigenic competition, and these antigens induced Th1 and Th2 cellular immune responses. Therefore, the oral immunization strategy using recombinant SC strains containing multiple ASFV antigens demonstrate potential for future testing in swine, including challenge studies to evaluate its efficacy as a vaccine against ASFV.
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Affiliation(s)
- Shuo Gao
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Wenfeng Zuo
- Research Institute of Wuhan Keqian Biology Co., Ltd, Wuhan, China
| | - Chao Kang
- Research Institute of Wuhan Keqian Biology Co., Ltd, Wuhan, China
| | - Zhong Zou
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Kaiqi Zhang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China
| | - Jun Qiu
- College of Animal Sciences, Yangtze University, Jingzhou, Hubei, China
| | - Xiaomin Shang
- Research Institute of Wuhan Keqian Biology Co., Ltd, Wuhan, China
| | - Jingjing Li
- Research Institute of Wuhan Keqian Biology Co., Ltd, Wuhan, China
| | - Yuanfeng Zhang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
- Research Institute of Wuhan Keqian Biology Co., Ltd, Wuhan, China
| | - Qi Zuo
- Research Institute of Wuhan Keqian Biology Co., Ltd, Wuhan, China
| | - Ya Zhao
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Meilin Jin
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
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Xu L, Hao F, Jeong DG, Chen R, Gan Y, Zhang L, Yeom M, Lim JW, Yu Y, Bai Y, Zeng Z, Liu Y, Xiong Q, Shao G, Wu Y, Feng Z, Song D, Xie X. Mucosal and cellular immune responses elicited by nasal and intramuscular inoculation with ASFV candidate immunogens. Front Immunol 2023; 14:1200297. [PMID: 37720232 PMCID: PMC10502713 DOI: 10.3389/fimmu.2023.1200297] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 08/21/2023] [Indexed: 09/19/2023] Open
Abstract
African swine fever (ASF) is an infectious disease caused by African swine fever virus (ASFV) that is highly contagious and has an extremely high mortality rate (infected by virulent strains) among domestic and wild pigs, causing huge economic losses to the pig industry globally. In this study, SDS-PAGE gel bands hybridized with ASFV whole virus protein combined with ASFV-convalescent and ASFV-positive pig serum were identified by mass spectrometry. Six antigens were detected by positive serum reaction bands, and eight antigens were detected in ASFV-convalescent serum. In combination with previous literature reports and proteins corresponding to MHC-II presenting peptides screened from ASFV-positive pig urine conducted in our lab, seven candidate antigens, including KP177R (p22), K78R (p10), CP204L (p30), E183L (p54), B602L (B602L), EP402R-N (CD2V-N) and F317L (F317L), were selected. Subunit-Group 1 was prepared by mixing above-mentioned seven ASFV recombinant proteins with MONTANIDETM1313 VG N mucosal adjuvant and immunizing pigs intranasally and intramuscularly. Subunit-Group 2 was prepared by mixing four ASFV recombinant proteins (p22, p54, CD2V-N1, B602L) with Montanide ISA 51 VG adjuvant and immunizing pigs by intramuscular injection. Anticoagulated whole blood, serum, and oral fluid were collected during immunization for flow cytometry, serum IgG as well as secretory sIgA antibody secretion, and cytokine expression testing to conduct a comprehensive immunogenicity assessment. Both immunogen groups can effectively stimulate the host to produce ideal humoral, mucosal, and cellular immune responses, providing a theoretical basis for subsequent functional studies, such as immunogens challenge protection and elucidation of the pathogenic mechanism of ASFV.
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Affiliation(s)
- Lulu Xu
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
| | - Fei Hao
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Nanjing, China
| | - Dae Gwin Jeong
- Bionanotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | - Rong Chen
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
| | - Yuan Gan
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
| | - Lei Zhang
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
| | - Minjoo Yeom
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Jong-Woo Lim
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Yanfei Yu
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
| | - Yun Bai
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
| | - Zhiyong Zeng
- College of Animal Science, Guizhou University, Guiyang, China
| | - Yongjie Liu
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Qiyan Xiong
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
| | - Guoqing Shao
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
| | - Yuzi Wu
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
| | - Zhixin Feng
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Nanjing, China
| | - Daesub Song
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Xing Xie
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
- Key Laboratory for Veterinary Bio-Product Engineering, Ministry of Agriculture and Rural Affairs, Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
- GuoTai (Taizhou) Center of Technology Innovation for Veterinary Biologicals, Taizhou, China
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Nanjing, China
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Yang Y, Xia Q, Zhou L, Zhang Y, Guan Z, Zhang J, Li Z, Liu K, Li B, Shao D, Qiu Y, Ma Z, Wei J. B602L-Fc fusion protein enhances the immunogenicity of the B602L protein of the African swine fever virus. Front Immunol 2023; 14:1186299. [PMID: 37426672 PMCID: PMC10324578 DOI: 10.3389/fimmu.2023.1186299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 06/05/2023] [Indexed: 07/11/2023] Open
Abstract
African swine fever (ASF) is an acute, highly contagious, and deadly infectious disease caused by the African swine fever virus (ASFV) and has a huge impact on the pig industry. A lack of vaccines and effective therapeutic drugs has brought great challenges to the prevention and control of ASF. In this study, insect baculovirus expression system was used to express ASFV B602L protein (B602L) alone and the IgG FC-fused B602L protein (B602L-Fc), and evaluate the immune effect of B602L-Fc in mice model. To be specific, the ASFV B602L protein and B602L-Fc fusion protein were successfully expressed by the insect baculovirus expression system. Then, Functional analysis in vitro revealed that the B602L-Fc fusion protein bound and interacted with the FcRI receptor of antigen-presenting cells and significantly promoted the expression of proteins involved in antigen presentation and various cytokines at mRNA levels in porcine alveolar macrophages. Additionally, immunization using B602L-Fc fusion protein remarkably promoted the Th1-biased cellular immune response and humoral immune response in mice. In conclusion, The B602L-Fc fusion protein could up-regulate the expression of molecules involved in antigen presentation in APCs and enhance the humoral and cellular immune responses in mice. These results suggest that ASFV B602L-Fc recombinant fusion protein may be a promising candidate for subunit vaccine. This study provided useful data for the development of subunit vaccines for ASF.
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Affiliation(s)
- Yang Yang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Qiqi Xia
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Lujia Zhou
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
- College of Animal Science and Technology & College of Veterinary Medicine of Zhejiang A&F University, Hangzhou, Zhejiang, China
| | - Yan Zhang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Zhixin Guan
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Junjie Zhang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Zongjie Li
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Ke Liu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Beibei Li
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Donghua Shao
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Yafeng Qiu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Zhiyong Ma
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
| | - Jianchao Wei
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, China
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Han N, Qu H, Xu T, Hu Y, Zhang Y, Ge S. Summary of the Current Status of African Swine Fever Vaccine Development in China. Vaccines (Basel) 2023; 11:vaccines11040762. [PMID: 37112673 PMCID: PMC10145671 DOI: 10.3390/vaccines11040762] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 03/31/2023] Open
Abstract
African swine fever (ASF) is a highly lethal and contagious disease of domestic pigs and wild boars. There is still no credible commercially available vaccine. The only existing one, issued in Vietnam, is actually used in limited quantities in limited areas, for large-scale clinical evaluation. ASF virus is a large complex virus, not inducing full neutralizing antibodies, with multiple genotypes and a lack of comprehensive research on virus infection and immunity. Since it was first reported in China in August 2018, ASF has spread rapidly across the country. To prevent, control, further purify and eradicate ASF, joint scientific and technological research on ASF vaccines has been carried out in China. In the past 4 years (2018–2022), several groups in China have been funded for the research and development of various types of ASF vaccines, achieving marked progress and reaching certain milestones. Here, we have provided a comprehensive and systematic summary of all of the relevant data regarding the current status of the development of ASF vaccines in China to provide a reference for further progress worldwide. At present, the further clinical application of the ASF vaccine still needs a lot of tests and research accumulation.
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Affiliation(s)
- Naijun Han
- China Animal Health and Epidemiology Center, No. 369 Nanjing Road, Qingdao 266032, China
| | - Hailong Qu
- China Animal Health and Epidemiology Center, No. 369 Nanjing Road, Qingdao 266032, China
| | - Tiangang Xu
- China Animal Health and Epidemiology Center, No. 369 Nanjing Road, Qingdao 266032, China
- Key Laboratory of Animal Biosafety Risk Prevention and Control (South), Ministry of Agriculture and Rural Affairs of the People’s Republic of China, No. 369 Nanjing Road, Qingdao 266032, China
| | - Yongxin Hu
- China Animal Health and Epidemiology Center, No. 369 Nanjing Road, Qingdao 266032, China
| | - Yongqiang Zhang
- China Animal Health and Epidemiology Center, No. 369 Nanjing Road, Qingdao 266032, China
| | - Shengqiang Ge
- China Animal Health and Epidemiology Center, No. 369 Nanjing Road, Qingdao 266032, China
- Key Laboratory of Animal Biosafety Risk Prevention and Control (South), Ministry of Agriculture and Rural Affairs of the People’s Republic of China, No. 369 Nanjing Road, Qingdao 266032, China
- Correspondence: ; Tel.: +86-53-2856-21552
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Li Y, Sun R, Li S, Tan Z, Li Z, Liu Y, Guo Y, Huang J. ASFV proteins presented at the surface of T7 phages induce strong antibody responses in mice. J Virol Methods 2023; 316:114725. [PMID: 36965632 DOI: 10.1016/j.jviromet.2023.114725] [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: 01/24/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 03/27/2023]
Abstract
African swine fever virus (ASFV) infection causes substantial economic losses to the swine industry worldwide, and there are still no safe and effective vaccines or therapeutics available. The granulated virus antigen improves the antigen present process and elicits high antibody reaction than the subunit antigen. In this study, the SpyTag peptide-p10 fusion protein was altered and displayed on the surface of the T7 phage to construct an engineered phage (T7-ST). At the same time, ASFV antigen-Spycatcher C-terminal-fused protein (antigen-SC) was expressed and purified by an E. coli prokaryotic expression system. Five virus-like particles (VLPs) displaying the main ASFV antigenic proteins P30, P54, P72, CD2v, and K145R were reconstructed by the isopeptide bond between SpyTag and antigen-SC proteins. The stability of five ASFV VLPs in high temperature and extreme pH conditions was evaluated by transmission electron microscopy (TEM) and plaque analysis. All ASFV VLPs induced a high titer antigen-specific antibody response in mice. Our results showed that the granulated antigen displaying ASFV protein on the surface of the T7 phage provides a robust potential vaccine and diagnostic tool to address the challenge of the ASFV pandemic.
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Affiliation(s)
- Yuanfang Li
- School of Life Sciences, Tianjin University, Tianjin, China, 300072
| | - Ruiqi Sun
- School of Life Sciences, Tianjin University, Tianjin, China, 300072
| | - Shujun Li
- School of Life Sciences, Tianjin University, Tianjin, China, 300072
| | - Zheng Tan
- School of Life Sciences, Tianjin University, Tianjin, China, 300072
| | - Zexing Li
- School of Life Sciences, Tianjin University, Tianjin, China, 300072
| | - Yebin Liu
- China Institute of Veterinary Drug Control, Beijing, China, 100081
| | - Yanyu Guo
- School of Life Sciences, Tianjin University, Tianjin, China, 300072.
| | - Jinhai Huang
- School of Life Sciences, Tianjin University, Tianjin, China, 300072.
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So KK, Le NMT, Nguyen NL, Kim DH. Improving expression and assembly of difficult-to-express heterologous proteins in Saccharomyces cerevisiae by culturing at a sub-physiological temperature. Microb Cell Fact 2023; 22:55. [PMID: 36959657 PMCID: PMC10035479 DOI: 10.1186/s12934-023-02065-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 03/19/2023] [Indexed: 03/25/2023] Open
Abstract
BACKGROUND Escherichia coli heat labile toxin B subunit (LTB) is one of the most popular oral vaccine adjuvants and intestine adsorption enhancers. It is often expressed as a fusion partner with target antigens to enhance their immunogenicity as well as gut absorbability. However, high expression levels of a fusion protein are critical to the outcome of immunization experiments and the success of subsequent vaccine development efforts. In order to improve the expression and functional assembly of LTB-fusion proteins using Saccharomyces cerevisiae, we compared their expression under culture conditions at a sub-physiological temperature 20 °C with their expression under a standard 30 °C. RESULTS The assembled expression of LTB-EDIII2 (LTB fused to the envelope domain III (EDIII) of Dengue virus serotype 2), which was expressed at the level of 20 µg/L in our previous study, was higher when the expression temperature was 20 °C as opposed to 30 °C. We also tested whether the expression and functional assembly of a difficult-to-express LTB fusion protein could be increased. The assembled expression of the difficult-to-express LTB-VP1 fusion protein (LTB fused to VP1 antigen of Foot-and-Mouth Disease Virus) dramatically increased, although the total amount of expressed protein was still lower than that of LTB-EDIII2. Slight but significant increase in the expression of well-known reporter protein eGFP, which has previously been shown to be increased by cultivation at 20 °C, was also observed in our expression system. As no significant changes in corresponding transcripts levels and cell growth were observed between 20 °C and 30 °C, we infer that translation and post-translational assembly are responsible for these enhancements. CONCLUSIONS The effects of lowering the expression temperature from 30 °C to 20 °C on protein expression and folding levels in S. cerevisiae, using several proteins as models, are reported. When heterologous proteins are expressed at 20 °C, a greater amount of (specially, more assembled) functional proteins accumulated than at 30 °C. Although further studies are required to understand the molecular mechanisms, our results suggest that lowering the expression temperature is a convenient strategy for improving the expression of relatively complexly structured and difficult-to-express proteins in S. cerevisiae.
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Affiliation(s)
- Kum-Kang So
- Institute for Molecular Biology and Genetics, Department of Molecular Biology, Jeonbuk National University, Jeonju, Jeollabuk-Do, 54896, Republic of Korea
| | - Ngoc My Tieu Le
- Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju, Jeollabuk-Do, 54896, Republic of Korea
| | - Ngoc-Luong Nguyen
- Department of Biology, College of Sciences, Hue University, Hue, 530000, Vietnam.
| | - Dae-Hyuk Kim
- Institute for Molecular Biology and Genetics, Department of Molecular Biology, Jeonbuk National University, Jeonju, Jeollabuk-Do, 54896, Republic of Korea.
- Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju, Jeollabuk-Do, 54896, Republic of Korea.
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Zhang H, Xie R, Zhang H, Sun R, Li S, Xia C, Li Z, Zhang L, Guo Y, Huang J. Recombinant Hemagglutinin protein and DNA-RNA-combined nucleic acid vaccines harbored by Yeast elicit protective immunity against H9N2 Avian Influenza infection. Poult Sci 2023; 102:102662. [PMID: 37043959 PMCID: PMC10140169 DOI: 10.1016/j.psj.2023.102662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/13/2023] [Accepted: 03/13/2023] [Indexed: 03/22/2023] Open
Abstract
A safe, convenience, and effective vaccine for controlling avian influenza virus infection is crucial in scale poultry production. Yeasts are considered useful vaccine vehicles for the delivery of antigens, which has been used to protect human and animal health. We report here the development of H9N2 strain hemagglutinin (HA)-based recombinant protein vaccines (rH9HA) and DNA-RNA-combined vaccine (rH9-DNA-RNA) in Saccharomyces cerevisiae for the first time. The immunogenicity assay indicated that both rH9HA and rH9-DNA-RNA could induce robust production of serum IgG, mucosal sIgA, and cellular immune responses. The reshape and diversification of gut microbiota and an enriched Lactobacillus, Debaryomyces were observed after oral immunization with rH9HA or rH9-DNA-RNA yeast vaccine, which might contribute to modulate the intestinal mucosal immunity and antiviral process. Oral immunized birds with either rH9HA or rH9-DNA-RNA were effectively protected from H9N2 virus challenge. Our findings suggested that yeast-derived H9N2 HA-based recombinant protein vaccines and DNA-RNA-combined nucleic acid vaccines are feasible and efficacious, opening up a new avenue for rapid and cost-effective production of avian influenza vaccines to achieve good protection effect.
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Austriaco N. Yeast oral vaccines against infectious diseases. Front Microbiol 2023; 14:1150412. [PMID: 37138614 PMCID: PMC10149678 DOI: 10.3389/fmicb.2023.1150412] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 03/31/2023] [Indexed: 05/05/2023] Open
Abstract
Vaccines that are delivered orally have several advantages over their counterparts that are administered via injection. Despite the advantages of oral delivery, however, approved oral vaccines are currently limited either to diseases that affect the gastrointestinal tract or to pathogens that have a crucial life cycle stage in the gut. Moreover, all of the approved oral vaccines for these diseases involve live-attenuated or inactivated pathogens. This mini-review summarizes the potential and challenges of yeast oral vaccine delivery systems for animal and human infectious diseases. These delivery systems utilize whole yeast recombinant cells that are consumed orally to transport candidate antigens to the immune system of the gut. This review begins with a discussion of the challenges associated with oral administration of vaccines and the distinct benefits offered by whole yeast delivery systems over other delivery systems. It then surveys the emerging yeast oral vaccines that have been developed over the past decade to combat animal and human diseases. In recent years, several candidate vaccines have emerged that can elicit the necessary immune response to provide significant protection against challenge by pathogen. They serve as proof of principle to show that yeast oral vaccines hold much promise.
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9
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Zhang H, Zhao S, Zhang H, Qin Z, Shan H, Cai X. Vaccines for African swine fever: an update. Front Microbiol 2023; 14:1139494. [PMID: 37180260 PMCID: PMC10173882 DOI: 10.3389/fmicb.2023.1139494] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 04/05/2023] [Indexed: 05/16/2023] Open
Abstract
African swine fever (ASF) is a fatal infectious disease of swine caused by the African swine fever virus (ASFV). Currently, the disease is listed as a legally notifiable disease that must be reported to the World Organization for Animal Health (WOAH). The economic losses to the global pig industry have been insurmountable since the outbreak of ASF. Control and eradication of ASF are very critical during the current pandemic. Vaccination is the optimal strategy to prevent and control the ASF epidemic, but since inactivated ASFV vaccines have poor immune protection and there aren't enough cell lines for efficient in vitro ASFV replication, an ASF vaccine with high immunoprotective potential still remains to be explored. Knowledge of the course of disease evolution, the way of virus transmission, and the breakthrough point of vaccine design will facilitate the development of an ASF vaccine. In this review, the paper aims to highlight the recent advances and breakthroughs in the epidemic and transmission of ASF, virus mutation, and the development of vaccines in recent years, focusing on future directions and trends.
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Affiliation(s)
- Hongliang Zhang
- Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
| | - Saisai Zhao
- Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
- College of Animal Science and Technology, Shandong Agricultural University, Tai’an, China
| | - Haojie Zhang
- Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
| | - Zhihua Qin
- Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
| | - Hu Shan
- Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
- *Correspondence: Hu Shan,
| | - Xiulei Cai
- Shandong Collaborative Innovation Center for Development of Veterinary Pharmaceuticals, College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
- Xiulei Cai,
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10
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Oral immunization of recombinant Saccharomyces cerevisiae expressing fiber-2 of fowl adenovirus serotype 4 induces protective immunity against homologous infection. Vet Microbiol 2022; 271:109490. [PMID: 35709627 DOI: 10.1016/j.vetmic.2022.109490] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 05/27/2022] [Accepted: 06/04/2022] [Indexed: 11/22/2022]
Abstract
Hydropericardium-hepatitis syndrome (HHS) caused by fowl adenovirus (FAdV) serotype 4 strains is a highly contagious disease that causes significant economic loss to the global poultry industry. However, subunit vaccine against FAdV-4 infection is not yet commercially available to date. This study aims to explore the potential for oral immunization of recombinant Saccharomyces cerevisiae expressing Fiber-2 of FAdV-4 as a subunit vaccine. Here, we constructed recombinant S. cerevisiae (ST1814G/Fiber-2) expressing recombinant Fiber-2 (rFiber-2), which was displayed on the cell surface. To evaluate the immune response and protective effect of live recombinant S. cerevisiae, chickens were orally immunized with the constructed live ST1814G/Fiber-2, three times at 5-day intervals, and then challenged with FAdV-4. The results showed that oral administration of live ST1814G/Fiber-2 could stimulate the production of humoral immunity, enhance the body's antiviral activity and immune regulation ability, improve the composition of gut microbiota, provide protection against FAdV-4 challenge, reduce viral load in the liver, and alleviate the pathological damage of heart, liver, and spleen for chicken. In addition, we found the synergistic effect in combining the ST1814G/Fiber-2 yeast and inactivated vaccine to trigger stronger humoral immunity and mucosal immunity. Our results suggest that oral live ST1814G/Fiber-2 is a potentially safer auxiliary preparation strategy in controlling FAdV-4 infection.
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11
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Tan Y, Chen L, Li K, Lou B, Liu Y, Liu Z. Yeast as carrier for drug delivery and vaccine construction. J Control Release 2022; 346:358-379. [PMID: 35483637 DOI: 10.1016/j.jconrel.2022.04.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 04/19/2022] [Accepted: 04/19/2022] [Indexed: 12/16/2022]
Abstract
Yeast has been employed as an effective derived drug carrier as a unicellular microorganism. Many research works have been devoted to the encapsulation of nucleic acid compounds, insoluble small molecule drugs, small molecules, liposomes, polymers, and various nanoparticles in yeast for the treatment of disease. Recombinant yeast-based vaccine carriers (WYV) have played a major role in the development of vaccines. Herein, the latest reports on the application of yeast carriers and the development of related research are summarized, a conceptual description of gastrointestinal absorption of yeast carriers, as well as the various package forms of different drug molecules and nanoparticles in yeast carriers are introduced. In addition, the advantages and development of recombinant yeast vaccine carriers for the disease, veterinary and aquaculture applications are discussed. Moreover, the current challenges and future directions of yeast carriers are proposed.
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Affiliation(s)
- Yifu Tan
- Department of Pharmaceutical Engineering, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan Province, PR China
| | - Liwei Chen
- Department of Pharmaceutical Engineering, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan Province, PR China
| | - Ke Li
- Department of Pharmaceutics, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, Hunan Province, PR China
| | - Beibei Lou
- Department of Pharmaceutics, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, Hunan Province, PR China
| | - Yanfei Liu
- Department of Pharmaceutical Engineering, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan Province, PR China.
| | - Zhenbao Liu
- Department of Pharmaceutics, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, Hunan Province, PR China; Molecular Imaging Research Center of Central South University, Changsha 410008, Hunan, PR China.
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Zhang L, Yao L, Guo Y, Li X, Ma L, Sun R, Han X, Liu J, Huang J. Oral SARS-CoV-2 Spike Protein Recombinant Yeast Candidate Prompts Specific Antibody and Gut Microbiota Reconstruction in Mice. Front Microbiol 2022; 13:792532. [PMID: 35464985 PMCID: PMC9022078 DOI: 10.3389/fmicb.2022.792532] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Accepted: 03/07/2022] [Indexed: 11/13/2022] Open
Abstract
A recent study showed that patients with coronavirus disease 2019 (COVID-19) have gastrointestinal symptoms and intestinal flora dysbiosis. Yeast probiotics shape the gut microbiome and improve immune homeostasis. In this study, an oral candidate of yeast-derived spike protein receptor-binding domain (RBD) and fusion peptide displayed on the surface of the yeast cell wall was generated. The toxicity and immune efficacy of oral administration were further performed in Institute of Cancer Research (ICR) mice. No significant difference in body weights, viscera index, and other side effects were detected in the oral-treated group. The detectable RBD-specific immunoglobulin G (IgG) and immunoglobulin A (IgA) of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and more complex microbiota were detected from oral administration mice compared with those of the control group. Interestingly, the recombinant yeast was identified in female fetal of the high-dose group. These results revealed that the displaying yeast could fulfill the agent-driven immunoregulation and gut microbiome reconstitution. The findings will shed light on new dimensions against SARS-CoV-2 infection with the synergistic oral agents as promising non-invasive immunization and restoring gut flora.
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Affiliation(s)
- Lilin Zhang
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Lan Yao
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Yanyu Guo
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Xiaoyang Li
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Li Ma
- Tianjin Institute of Pharmaceutical Research Co., Ltd., Tianjin, China
| | - Ruiqi Sun
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Xueqing Han
- Chinese Academy of Inspection and Quarantine, Beijing, China
| | - Jing Liu
- Tianjin Institute of Pharmaceutical Research Co., Ltd., Tianjin, China
- Jing Liu,
| | - Jinhai Huang
- School of Life Sciences, Tianjin University, Tianjin, China
- *Correspondence: Jinhai Huang,
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13
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Tran HTT, Truong AD, Chu NT, Vu HN, Nguyen HT, Nguyen T, Siti F, Lee H, Leon AD, Yersin AG, Dang HV. Inhibition of African swine fever virus replication by β-glucan. Open Vet J 2022; 12:1027-1034. [PMID: 36650869 PMCID: PMC9805760 DOI: 10.5455/ovj.2022.v12.i6.31] [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: 09/15/2022] [Accepted: 11/22/2022] [Indexed: 12/30/2022] Open
Abstract
Background African swine fever (ASF) is one of the most important diseases in pigs because of its effects on all ages and breeds. To date, commercial vaccines and drugs for the prevention of ASF are lacking in the market and the survival of African swine fever virus (ASFV) in various environmental, farm, and or feed matrices has allowed the virus to remain, causing new outbreaks in the pig population. Besides biosecurity and animal husbandry management practices, the improvement of the host immune responses is critical to control, managing, and preventing ASF. Aim In this study, we investigated the protective role of β-glucan against ASFV infection using a porcine alveolar macrophage (PAM) model. Methods The effects of β-glucan on cell proliferation were evaluated by using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. The potential effects of β-glucan against a field ASFV strain isolated in Vietnam were further examined by real-time PCR and hemadsorption assays. The interferon (IFN)-α and interleukin (IL)-6 protein production induced by β-glucan was determined using a sandwich enzyme-linked immunosorbent assay. Results Our results demonstrated that the β-glucan additive possessed an immune stimulus factor against ASFV. Specifically, protection of PAMs against ASFV infection in vitro was observed at 12 hours (p < 0.05) at the tested doses (30 and 50 µg/ml) as induced by incubation with β-glucan for 2 hours. These effects remained until 24 hours after post-infection. Additionally, at a high dose (50 µg/ml), pre-treatment with the β-glucan statistically increased the expression levels of IFNα and IL-6 when compared to untreated groups or only ASFV infection. Conclusion Together, these findings indicated that the β-glucan may protect the host against ASFV infection via the multiple cellular immune mechanisms.
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Affiliation(s)
- Ha Thi Thanh Tran
- Department of Biochemistry and Immunology, National Institute of Veterinary Research, 86 Truong Chinh, Dong Da, Hanoi 100000, Vietnam,Both authors contributed equally to this work
| | - Anh Duc Truong
- Department of Biochemistry and Immunology, National Institute of Veterinary Research, 86 Truong Chinh, Dong Da, Hanoi 100000, Vietnam,Both authors contributed equally to this work
| | - Nhu Thi Chu
- Department of Biochemistry and Immunology, National Institute of Veterinary Research, 86 Truong Chinh, Dong Da, Hanoi 100000, Vietnam
| | - Hoai Nam Vu
- Department of Biochemistry and Immunology, National Institute of Veterinary Research, 86 Truong Chinh, Dong Da, Hanoi 100000, Vietnam
| | - Huyen Thi Nguyen
- Department of Biochemistry and Immunology, National Institute of Veterinary Research, 86 Truong Chinh, Dong Da, Hanoi 100000, Vietnam
| | - Tinh Nguyen
- Kemin Animal Nutrition and Health, Asia Pacific 12 Senoko Drive, 758200 Singapore
| | - Fatimah Siti
- Kemin Animal Nutrition and Health, Asia Pacific 12 Senoko Drive, 758200 Singapore
| | - Hans Lee
- Kemin Animal Nutrition and Health, Asia Pacific 12 Senoko Drive, 758200 Singapore
| | - Alexander De Leon
- Kemin Animal Nutrition and Health, Asia Pacific 12 Senoko Drive, 758200 Singapore
| | | | - Hoang Vu Dang
- Department of Biochemistry and Immunology, National Institute of Veterinary Research, 86 Truong Chinh, Dong Da, Hanoi 100000, Vietnam,Corresponding Author: Hoang Vu Dang. Department of Biochemistry and Immunology, National Institute of Veterinary Research, Hanoi, Vietnam.
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Sun W, Zhang H, Fan W, He L, Chen T, Zhou X, Qi Y, Sun L, Hu R, Luo T, Liu W, Li J. Evaluation of Cellular Immunity with ASFV Infection by Swine Leukocyte Antigen (SLA)-Peptide Tetramers. Viruses 2021; 13:v13112264. [PMID: 34835070 PMCID: PMC8617699 DOI: 10.3390/v13112264] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/05/2021] [Accepted: 11/10/2021] [Indexed: 12/27/2022] Open
Abstract
African swine fever virus (ASFV) causes acute hemorrhagic fever in domestic pigs and wild boars, resulting in incalculable economic losses to the pig industry. As the mechanism of viral infection is not clear, protective antigens have not been discovered or identified. In this study, we determined that the p30, pp62, p72, and CD2v proteins were all involved in the T cell immune response of live pigs infected with ASFV, among which p72 and pp62 proteins were the strongest. Panoramic scanning was performed on T cell epitopes of the p72 protein, and three high-frequency positive epitopes were selected to construct a swine leukocyte antigen (SLA)-tetramer, and ASFV-specific T cells were detected. Subsequently, the specific T cell and humoral immune responses of ASFV-infected pigs and surviving pigs were compared. The results demonstrate that the specific T cellular immunity responses gradually increased during the infection and were higher than that in the surviving pigs in the late stages of infection. The same trend was observed in specific humoral immune responses, which were highest in surviving pigs. In general, our study provides key information for the exploration of ASFV-specific immune responses and the development of an ASFV vaccine.
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Affiliation(s)
- Wenqiang Sun
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Laboratory of Animal Infectious Diseases, College of Animal Sciences and Veterinary Medicine, Guangxi University, Nanning 530004, China;
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (H.Z.); (W.F.); (L.H.); (L.S.)
- Institute of Infectious Diseases, Shenzhen Bay Laboratory, Shenzhen 518000, China
| | - He Zhang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (H.Z.); (W.F.); (L.H.); (L.S.)
- Institute of Infectious Diseases, Shenzhen Bay Laboratory, Shenzhen 518000, China
| | - Wenhui Fan
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (H.Z.); (W.F.); (L.H.); (L.S.)
| | - Lihong He
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (H.Z.); (W.F.); (L.H.); (L.S.)
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Teng Chen
- Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun 130122, China; (T.C.); (X.Z.); (Y.Q.)
| | - Xintao Zhou
- Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun 130122, China; (T.C.); (X.Z.); (Y.Q.)
| | - Yu Qi
- Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun 130122, China; (T.C.); (X.Z.); (Y.Q.)
| | - Lei Sun
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (H.Z.); (W.F.); (L.H.); (L.S.)
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rongliang Hu
- Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun 130122, China; (T.C.); (X.Z.); (Y.Q.)
- Correspondence: (R.H.); (T.L.); (W.L.); (J.L.)
| | - Tingrong Luo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Laboratory of Animal Infectious Diseases, College of Animal Sciences and Veterinary Medicine, Guangxi University, Nanning 530004, China;
- Correspondence: (R.H.); (T.L.); (W.L.); (J.L.)
| | - Wenjun Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Laboratory of Animal Infectious Diseases, College of Animal Sciences and Veterinary Medicine, Guangxi University, Nanning 530004, China;
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (H.Z.); (W.F.); (L.H.); (L.S.)
- Institute of Infectious Diseases, Shenzhen Bay Laboratory, Shenzhen 518000, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (R.H.); (T.L.); (W.L.); (J.L.)
| | - Jing Li
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; (H.Z.); (W.F.); (L.H.); (L.S.)
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (R.H.); (T.L.); (W.L.); (J.L.)
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15
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Chen XL, Wang JH, Zhao W, Shi CW, Yang KD, Niu TM, Yang GL, Cao X, Jiang YL, Wang JZ, Huang HB, Zeng Y, Wang N, Yang WT, Wang CF. Lactobacillus plantarum surface-displayed ASFV (p54) with porcine IL-21 generally stimulates protective immune responses in mice. AMB Express 2021; 11:114. [PMID: 34383171 PMCID: PMC8360262 DOI: 10.1186/s13568-021-01275-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 08/05/2021] [Indexed: 02/06/2023] Open
Abstract
African classical swine fever virus (ASFV) has spread seriously around the world and has dealt with a heavy blow to the pig breeding industry due to the lack of vaccines. In this study, we produced recombinant Lactobacillus plantarum (L. plantarum) expressing an ASFV p54 and porcine IL-21 (pIL-21) fusion protein and evaluated the immune effect of NC8-pSIP409-pgsA'-p54-pIL-21 in a mouse model. First, we verified that the ASFV p54 protein and p54-pIL-21 fusion protein were anchored on the surface of L. plantarum NC8 by flow cytometry, immunofluorescence and Western blotting. Then, the results were verified by flow cytometry, ELISA and MTT assays. Mouse-specific humoral immunity and mucosal and T cell-mediated immune responses were induced by recombinant L. plantarum. The results of feeding mice recombinant L. plantarum showed that the levels of serum IgG and mucosal secreted IgA (SIgA), the number of CD4 and CD8 T cells, and the expression of IFN-γ in CD4 and CD8 T cells increased significantly, and lymphocyte proliferation occurred under stimulation with the ASFV p54 protein. Our data lay a foundation for the development of oral vaccines against ASFV in the future.
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16
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Gao Z, Shao JJ, Zhang GL, Ge SD, Chang YY, Xiao L, Chang HY. Development of an indirect ELISA to specifically detect antibodies against African swine fever virus: bioinformatics approaches. Virol J 2021; 18:97. [PMID: 33952293 PMCID: PMC8097255 DOI: 10.1186/s12985-021-01568-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 04/29/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND African swine fever (ASF), characterized by acute, severe, and fast-spreading, is a highly lethal swine infectious disease caused by the African swine fever virus (ASFV), which has caused substantial economic losses to the pig industry worldwide in the past 100 years. METHODS This study started with bioinformatics methods and verified the epitope fusion protein method's reliability that does not rely on traditional epitope identification. Meanwhile, it will also express and purify the constructed genes through prokaryotic expression and establish antibody detection methods. RESULTS The results indicated that the protein had good reactivity and did not cross-react with other swine diseases. The receiver-operating characteristic analysis was performed to verify the determination. The area under the receiver-operating characteristic curve was 0.9991 (95% confidence interval 0.9973 to 1.001). CONCLUSIONS It was proved that the recombinant protein is feasible as a diagnostic antigen to distinguish ASFV and provides a new idea for ASFV antibody detection.
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Affiliation(s)
- Zhan Gao
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 1 Xujiaping, Yanchangbao, Chengguan District, Lanzhou, 730046, Gansu, China
| | - Jun-Jun Shao
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 1 Xujiaping, Yanchangbao, Chengguan District, Lanzhou, 730046, Gansu, China
| | - Guang-Lei Zhang
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 1 Xujiaping, Yanchangbao, Chengguan District, Lanzhou, 730046, Gansu, China
| | - Su-Dan Ge
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 1 Xujiaping, Yanchangbao, Chengguan District, Lanzhou, 730046, Gansu, China
| | - Yan-Yan Chang
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 1 Xujiaping, Yanchangbao, Chengguan District, Lanzhou, 730046, Gansu, China
| | - Lei Xiao
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 1 Xujiaping, Yanchangbao, Chengguan District, Lanzhou, 730046, Gansu, China
| | - Hui-Yun Chang
- State Key Laboratory of Veterinary Etiological Biology, OIE/National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 1 Xujiaping, Yanchangbao, Chengguan District, Lanzhou, 730046, Gansu, China.
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