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Huang Y, Zhai W, Wang Z, He Y, Tao C, Chu Y, Pang Z, Zhu H, Jia H. Analysis of the Immunogenicity of African Swine Fever F317L Protein and Screening of T Cell Epitopes. Animals (Basel) 2024; 14:1331. [PMID: 38731330 PMCID: PMC11083013 DOI: 10.3390/ani14091331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Revised: 04/15/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
The African swine fever virus (ASFV) encodes numerous proteins characterized by complex immune escape mechanisms. At present, the structure and function of these proteins, including the F317L protein, have yet to be fully elucidated. In this study, we examined the immunogenicity of the F317L protein. Mice were subcutaneously immunized with the F317L protein using initial and subsequent booster doses, and, at the 28th day post-treatment, we assessed the humoral and cellular immune responses of mice. The F317L protein stimulated production of specific antibodies and activated humoral immune responses. In addition, F317L stimulated the production of large amounts of IFN-γ by splenic lymphocytes, thereby activating cellular immune responses. Using informatics technology, we predicted and synthesized 29 F317L protein T cell epitopes, which were screened using IFN-γ ELISpot. Among these, the F25 (246SRRSLVNPWT255) peptide was identified as having a stronger stimulatory effect than the full-length protein. Collectively, our findings revealed that the ASFV F317L protein can stimulate both strong humoral and cellular immunity in mice, and that the F25 (246SRRSLVNPWT255) peptide may be a potential active T cell epitope. These findings will provide a reference for further in-depth studies of the F317L protein and screening of antigenic epitopes.
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Affiliation(s)
- Ying Huang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Y.H.); (W.Z.); (Z.W.); (Y.H.); (C.T.); (Y.C.); (Z.P.); (H.Z.)
| | - Wenzhu Zhai
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Y.H.); (W.Z.); (Z.W.); (Y.H.); (C.T.); (Y.C.); (Z.P.); (H.Z.)
| | - Zhen Wang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Y.H.); (W.Z.); (Z.W.); (Y.H.); (C.T.); (Y.C.); (Z.P.); (H.Z.)
| | - Yuheng He
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Y.H.); (W.Z.); (Z.W.); (Y.H.); (C.T.); (Y.C.); (Z.P.); (H.Z.)
- Animal Science and Technology College, Beijing University of Agriculture, Beijing 100193, China
| | - Chunhao Tao
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Y.H.); (W.Z.); (Z.W.); (Y.H.); (C.T.); (Y.C.); (Z.P.); (H.Z.)
| | - Yuanyuan Chu
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Y.H.); (W.Z.); (Z.W.); (Y.H.); (C.T.); (Y.C.); (Z.P.); (H.Z.)
- Animal Science and Technology College, Beijing University of Agriculture, Beijing 100193, China
| | - Zhongbao Pang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Y.H.); (W.Z.); (Z.W.); (Y.H.); (C.T.); (Y.C.); (Z.P.); (H.Z.)
| | - Hongfei Zhu
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Y.H.); (W.Z.); (Z.W.); (Y.H.); (C.T.); (Y.C.); (Z.P.); (H.Z.)
| | - Hong Jia
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (Y.H.); (W.Z.); (Z.W.); (Y.H.); (C.T.); (Y.C.); (Z.P.); (H.Z.)
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Peng Y, Yan H, Zhang J, Peng R, Feng X, Su J, Yi H, Lu Y, Chen Z. Potent immune responses against thermostable Foot-and-Mouth disease virus VP1 nanovaccine adjuvanted with polymeric thermostable scaffold. Vaccine 2024; 42:732-737. [PMID: 38220487 DOI: 10.1016/j.vaccine.2023.12.079] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 12/22/2023] [Accepted: 12/24/2023] [Indexed: 01/16/2024]
Abstract
Foot-and-mouth disease (FMD) is an acute zoonosis causes significant economic losses. Vaccines able to stimulate efficient protective immune responses are urgently needed. In this study, Escherichia coli-derived recombinant VP1 of serotype A and O FMD virus (FMDV) was conjugated to thermostable scaffold lumazine synthase (LS) or Quasibacillus thermotolerans encapsulin (QtEnc) using a robust plug-and-display SpyTag/SpyCatcher system to generate multimeric nanovaccines. These nanovaccines induced highly potent antibody responses in vaccinated mice. On day 14 after the first immunisation, antibody titres were approximately 100 times higher than those of monomer antigens. Both vaccines induced high and long-term IgG antibody production. Moreover, the QtEnc-VP1 nanovaccine induced higher antibody titres than the LS-VP1 nanovaccine. The nanovaccines also induced Th1-biased immune responses and higher levels of neutralising antibodies. These data indicated that FMDV nanovaccines generated by conjugating VP1 with a thermostable scaffold are highly immunogenic and ideal candidates for FMDV control in low-resource areas.
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Affiliation(s)
- Yuanli Peng
- One Health Center of Excellence for Research and Training, School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China; NMPA Key Laboratory for Quality Monitoring and Evaluation of Vaccines and Biological Products, Guangzhou, 510080, China; Key Laboratory of Tropical Diseases Control, Sun Yat-Sen University, Ministry of Education, Guangzhou, 510080, China
| | - Haozhen Yan
- One Health Center of Excellence for Research and Training, School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China; NMPA Key Laboratory for Quality Monitoring and Evaluation of Vaccines and Biological Products, Guangzhou, 510080, China; Key Laboratory of Tropical Diseases Control, Sun Yat-Sen University, Ministry of Education, Guangzhou, 510080, China
| | - Jinsong Zhang
- One Health Center of Excellence for Research and Training, School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China; NMPA Key Laboratory for Quality Monitoring and Evaluation of Vaccines and Biological Products, Guangzhou, 510080, China; Key Laboratory of Tropical Diseases Control, Sun Yat-Sen University, Ministry of Education, Guangzhou, 510080, China
| | - Ruihao Peng
- One Health Center of Excellence for Research and Training, School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China; NMPA Key Laboratory for Quality Monitoring and Evaluation of Vaccines and Biological Products, Guangzhou, 510080, China; Key Laboratory of Tropical Diseases Control, Sun Yat-Sen University, Ministry of Education, Guangzhou, 510080, China
| | - Xiangning Feng
- One Health Center of Excellence for Research and Training, School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China; NMPA Key Laboratory for Quality Monitoring and Evaluation of Vaccines and Biological Products, Guangzhou, 510080, China; Key Laboratory of Tropical Diseases Control, Sun Yat-Sen University, Ministry of Education, Guangzhou, 510080, China
| | - Jiayue Su
- One Health Center of Excellence for Research and Training, School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China; NMPA Key Laboratory for Quality Monitoring and Evaluation of Vaccines and Biological Products, Guangzhou, 510080, China; Key Laboratory of Tropical Diseases Control, Sun Yat-Sen University, Ministry of Education, Guangzhou, 510080, China
| | - Huaimin Yi
- One Health Center of Excellence for Research and Training, School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China; NMPA Key Laboratory for Quality Monitoring and Evaluation of Vaccines and Biological Products, Guangzhou, 510080, China; Key Laboratory of Tropical Diseases Control, Sun Yat-Sen University, Ministry of Education, Guangzhou, 510080, China
| | - Yuying Lu
- One Health Center of Excellence for Research and Training, School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China; NMPA Key Laboratory for Quality Monitoring and Evaluation of Vaccines and Biological Products, Guangzhou, 510080, China; Key Laboratory of Tropical Diseases Control, Sun Yat-Sen University, Ministry of Education, Guangzhou, 510080, China
| | - Zeliang Chen
- One Health Center of Excellence for Research and Training, School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China; NMPA Key Laboratory for Quality Monitoring and Evaluation of Vaccines and Biological Products, Guangzhou, 510080, China; Key Laboratory of Tropical Diseases Control, Sun Yat-Sen University, Ministry of Education, Guangzhou, 510080, China; Key Laboratory of Zoonose Prevention and Control at Universities of Inner Mongolia Autonomous Region, Medical College, Inner Mongolia Minzu University, Tongliao, 028000, P. R. China; Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Shenyang Agricultural University, Shenyang, 110866, China.
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