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Shi DY, Liu FJ, Mao YY, Cui RT, Lu JS, Yu YZ, Dong XJ, Yang ZX, Sun ZW, Pang XB. Development and evaluation of candidate subunit vaccine and novel antitoxin against botulinum neurotoxin serotype E. Hum Vaccin Immunother 2019; 16:100-108. [PMID: 31210561 DOI: 10.1080/21645515.2019.1633878] [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] [Indexed: 10/26/2022] Open
Abstract
Botulinum neurotoxins (BoNTs) are among the most toxic proteins. Vaccination is an effective strategy to prevent botulism. To generate a vaccine suitable for human use, a recombinant non-His-tagged isoform of the Hc domain of botulinum neurotoxin serotype E (rEHc) was expressed in Escherichia coli and purified by sequential chromatography. The immunogenicity of rEHc was evaluated in mice and dose- and time-dependent immune responses were observed in both antibody titers and protective potency. Then, the pilot-scale expression and purification of rEHc were performed, and its immunological activity was characterized. Our results showed rEHc has good immunogenicity and can elicit strong protective potency against botulinum neurotoxin serotype E (BoNT/E) in mice, indicating that rEHc is an effective botulism vaccine candidate. Further, we developed a novel antitoxin against BoNT/E by purifying F(ab')2 from pepsin-digested serum IgG of rEHc-inoculated horses. The protective effect of the F(ab')2 antitoxin was determined in vitro and in vivo. The results showed that our F(ab')2 antitoxin can prevent botulism in BoNT/E-challenged mice and effectively alleviate the progression of paralysis caused by BoNT/E to achieve therapeutic effects. Therefore, our results provide valuable experimental data for the production of a novel antitoxin, which is a promising candidate for the treatment of BoNT/E-induced botulism.
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Affiliation(s)
- Dan-Yang Shi
- Department of Protein Engineering, Beijing Institute of Biotechnology, Beijing, China
| | - Fu-Jia Liu
- Department of Protein Engineering, Beijing Institute of Biotechnology, Beijing, China.,Pharmaceutical College, Henan University, Kaifeng, China
| | - Yun-Yun Mao
- Department of Protein Engineering, Beijing Institute of Biotechnology, Beijing, China
| | - Rong-Tian Cui
- Department of Drug Registration, Jiangsu T-mab BioPharma Co., Ltd, Taizhou, China
| | - Jian-Sheng Lu
- Department of Protein Engineering, Beijing Institute of Biotechnology, Beijing, China
| | - Yun-Zhou Yu
- Department of Protein Engineering, Beijing Institute of Biotechnology, Beijing, China
| | - Xiao-Jie Dong
- Department of Protein Engineering, Beijing Institute of Biotechnology, Beijing, China
| | - Zhi-Xin Yang
- Department of Protein Engineering, Beijing Institute of Biotechnology, Beijing, China
| | - Zhi-Wei Sun
- Department of Protein Engineering, Beijing Institute of Biotechnology, Beijing, China
| | - Xiao-Bin Pang
- Pharmaceutical College, Henan University, Kaifeng, China
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Shi DY, Chen BY, Mao YY, Zhou G, Lu JS, Yu YZ, Zhou XW, Sun ZW. Development and evaluation of candidate subunit vaccine against botulinum neurotoxin serotype B. Hum Vaccin Immunother 2018; 15:755-760. [PMID: 30433836 DOI: 10.1080/21645515.2018.1547613] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Botulinum neurotoxins (BoNTs) are potential biological weapons because of their high toxicity and mortality. Vaccination is an effective strategy to prevent botulism. The carboxyl-terminus of the heavy chain (Hc domain) is nontoxic and sufficient to generate protective immune responses against natural BoNTs in animals. To produce a vaccine suitable for human use, a recombinant non His-tagged isoform of the Hc domain of botulinum neurotoxin serotype B (BHc) was expressed in Escherichia coli and purified by sequential chromatography. The immunogenicity of recombinant E.coli-expressed BHc and the yeast-expressed mBHc antigens was explored and compared in Balb/c mice. BHc provided comparable protective potency but elicited significantly higher antibody titer and neutralization potency against BoNT/B after twice immunization, indicating that the recombinant BHc protein expressed in E.coli have better immunogenicity than the yeast-expressed mBHc. Moreover, a frequency and dose-dependent effect was observed in mice immunized with BHc subunit vaccine and the anti-BHc ELISA antibody titers correlated well with neutralizing antibody titers and protection potency. In summary, the Alhydrogel-formulated BHc subunit vaccine afforded effective protection against BoNT/B challenge. Therefore, the non-His-tagged and homogeneous BHc expressed in E.coli represents a good potential candidate subunit vaccine for human use.
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Affiliation(s)
- Dan-Yang Shi
- a Department of Protein Engineering , Beijing Institute of Biotechnology , Beijing , China
| | - Bo-Yang Chen
- a Department of Protein Engineering , Beijing Institute of Biotechnology , Beijing , China
| | - Yun-Yun Mao
- a Department of Protein Engineering , Beijing Institute of Biotechnology , Beijing , China
| | - Guo Zhou
- a Department of Protein Engineering , Beijing Institute of Biotechnology , Beijing , China
| | - Jian-Sheng Lu
- a Department of Protein Engineering , Beijing Institute of Biotechnology , Beijing , China
| | - Yun-Zhou Yu
- a Department of Protein Engineering , Beijing Institute of Biotechnology , Beijing , China
| | - Xiao-Wei Zhou
- a Department of Protein Engineering , Beijing Institute of Biotechnology , Beijing , China
| | - Zhi-Wei Sun
- a Department of Protein Engineering , Beijing Institute of Biotechnology , Beijing , China
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Ambrose EA. Botulinum Neurotoxin, Tetanus Toxin, and Anthrax Lethal Factor Countermeasures. TOPICS IN MEDICINAL CHEMISTRY 2016. [DOI: 10.1007/7355_2016_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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