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da Costa CBP, Carvalho VRD, Ferreira LLC, Mattos JLC, Garcia LDM, Antunes MDS, Martins FJ, Ratcliffe NA, Cisne R, Castro HC. Production of hyperimmune sera: a study of digestion and fractionation methodologies for the purification process of heterologous immunoglobulins. TOXIN REV 2022. [DOI: 10.1080/15569543.2022.2124421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Camila Braz Pereira da Costa
- Instituto Vital Brazil, Niterói, Brazil
- Programa de Pós-graduação em Ciências e Biotecnologia, Instituto de Biologia, Universidade Federal Fluminense, Niterói, Brazil
| | | | | | | | | | | | - Francislene Juliana Martins
- Programa de Pós-graduação em Ciências e Biotecnologia, Instituto de Biologia, Universidade Federal Fluminense, Niterói, Brazil
- Faculdade de Farmácia, Universidade Federal Fluminense, Niterói, Brazil
| | - Norman A. Ratcliffe
- Programa de Pós-graduação em Ciências e Biotecnologia, Instituto de Biologia, Universidade Federal Fluminense, Niterói, Brazil
- Department of Biosciences, Swansea University, Swansea, UK
| | - Rafael Cisne
- Programa de Pós-graduação em Ciências e Biotecnologia, Instituto de Biologia, Universidade Federal Fluminense, Niterói, Brazil
| | - Helena C. Castro
- Programa de Pós-graduação em Ciências e Biotecnologia, Instituto de Biologia, Universidade Federal Fluminense, Niterói, Brazil
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Liu J, Zhang Z, Bai A, Sha Y, Ma L, Qin S, Chen F, Qin S, Wu J. Prophylactic Efficacy of Equine Immunoglobulin F(ab') 2 Fragments Against Feline Parvovirus. Appl Biochem Biotechnol 2021; 193:3151-3162. [PMID: 34086256 PMCID: PMC8175436 DOI: 10.1007/s12010-021-03591-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 05/28/2021] [Indexed: 11/26/2022]
Abstract
Feline parvovirus (FPV), a type of parvovirus prevalent worldwide, can cause foetal death and acute enteritis in adult cats with severe leukopenia, and yet there are no effective drugs to prevent or treat FPV. Here, the immune effects of two FPV vaccines on horses were compared. IgG was extracted from FPV-immunized horse sera. Equine F(ab')2 fragments were obtained from pepsin-digested IgG and then purified by protein-G column chromatography. The results showed that the inactivated FPV oil vaccine was more effective than the inactivated FPV propolis vaccine in helping healthy horses to produce hyper-immune serum. Four methods were tested, among which the optimized octanoic acid-ammonium sulphate precipitation method was proved to be the best process for extracting IgG. The optimal condition for preparing F(ab')2 by pepsin digestion was 30 °C for 3.5 h, and the content, purity and recovery of F(ab')2 were 8.64 mg/mL, 90.36% and 93.24%, respectively. Our equine immunoglobulin F(ab')2 fragments effectively neutralized activity in vitro against FPV, alleviated the clinical symptoms of FPV-infected cats, reduced the viral loads in the intestine and had prophylactic effects in FPV-infected cats. These results indicate that the F(ab')2 fragment prepared from inactivated FPV-immunized horses may be used as a prophylactic agent for diseases caused by FPV.
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Affiliation(s)
- Jinfeng Liu
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, China
| | - Zhenjiang Zhang
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, China
| | - Anbin Bai
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, China
| | - Yiyu Sha
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, China
| | - Ling Ma
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, China
| | - Shaomin Qin
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, China
| | - Fenglian Chen
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, China
| | - Shuying Qin
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, China
| | - Jianmin Wu
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, 530001, China.
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Li Y, Han L, Zhao Y, Zheng X, Wang H, Gai W, Jin H, Li G, Wang Q, Feng N, Gao Y, Yang S, Xia X. Immunogenicity Assessment of Rift Valley Fever Virus Virus-Like Particles in BALB/c Mice. Front Vet Sci 2020; 7:62. [PMID: 32118075 PMCID: PMC7031255 DOI: 10.3389/fvets.2020.00062] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 01/24/2020] [Indexed: 12/20/2022] Open
Abstract
Rift Valley fever (RVF) is an acute, febrile zoonotic disease that is caused by the RVF virus (RVFV) and is spread by arthropod vectors. Virus-like particle (VLP) vaccines, which have the advantages of strong immunogenicity and safety, play an important role in the prevention of this disease. VLPs for RVFV were successfully prepared by our research group using a baculovirus-insect cell expression system. To study the immunogenicity of these RVFV VLPs, a correct 3rd or 4th generation recombinant baculovirus, rBac-N-G, was identified and used to infect Sf9 cells, which were cultured in suspension at a large scale. Subsequently, cell debris was removed by centrifugation, and the VLPs were concentrated by ultracentrifugation and purified using a sucrose gradient, after which they were used to immunize BALB/c mice by intramuscular injection. The results showed that the RVFV VLPs prepared by our research group could effectively induce mice to produce RVFV neutralizing antibodies and that the prepared VLPs could stimulate mouse spleen cells to produce high levels of the cytokines IL-4 and IFN-γ. Moreover, the proportion of lymphocytes producing IL-4 and IFN-γ in the spleen of mice immunized with RVFV VLPs was significantly increased. Therefore, the RVFV VLPs prepared in this study had strong immunogenicity and could effectively activate humoral and cellular immunity in mice. This study lays a solid foundation for the development of RVFV VLP vaccine candidates and promotes the healthy development of animal husbandry and human public health.
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Affiliation(s)
- Yuetao Li
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, China.,Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun, China.,College of Animal Science and Technology, Shihezi University, Shihezi, China
| | - Li Han
- College of Animal Science and Technology, Shihezi University, Shihezi, China
| | - Yongkun Zhao
- Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun, China
| | - Xuexing Zheng
- Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun, China.,School of Public Health, Shandong University, Jinan, China
| | - Hualei Wang
- Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun, China.,Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Weiwei Gai
- Nano Innovation Institute, Inner Mongolia University for the Nationalities, Tongliao, China
| | - Hongli Jin
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Guohua Li
- College of Animal Science and Technology, Shihezi University, Shihezi, China
| | - Qi Wang
- College of Animal Science and Technology, Shihezi University, Shihezi, China
| | - Na Feng
- Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun, China
| | - Yuwei Gao
- Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun, China
| | - Songtao Yang
- Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun, China
| | - Xianzhu Xia
- Institute of Military Veterinary Medicine, Academy of Military Medical Science, Changchun, China
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