A novel IgG-Fc-Fused multiepitope vaccine against Brucella: robust immunogenicity
Brucellosis is one of the most common zoonotic diseases caused by Brucella spp. However, there is currently no Brucella vaccine available for humans. Although some attenuated live vaccines have been approved for animals, their protective efficacy is suboptimal. In previous studies, we utilized an epitope- and structure-based vaccinology platform to identify the immunodominant epitopes of Brucella antigens OMP19, OMP16, OMP25, and L7/L12, and constructed the multi-epitope vaccine MEV-Fc against Brucella. In this study, OMP19, OMP16, OMP25, and L7/L12, and MEV-Fc was expressed and purified via an Escherichia coli expression system, which validated that MEV-Fc possesses high immunological efficacy and exerts a significant protective effect in BALB/c mice within the Brucella infection model. MEV-Fc enhanced Th1 and Th2 immune responses and strongly induced the production of the pro-inflammatory cytokine IFN-γ. Furthermore, MEV-Fc protected mice against Brucella infection compared to control group (PBS). In conclusion, our results provide new insights and data support for the development of human Brucella vaccines.
Authors
- Caidong Liu
- Xin Yao Li (ORCID: https://orcid.org/0009-0003-7780-1121)
- Songbin Fu (ORCID: https://orcid.org/0000-0003-0382-9888)
- Honghuan Li (ORCID: https://orcid.org/0000-0002-1983-3470)
- Taiping He (ORCID: https://orcid.org/0000-0001-6213-0837)
- Yueli Wang (ORCID: https://orcid.org/0000-0001-5320-4953)
- Kaiat Zhumanov
- Zhongchen Ma (ORCID: https://orcid.org/0000-0002-3951-4610)
- Changsuo Zhang (ORCID: https://orcid.org/0000-0001-8754-0656)
- Jihai Yi (ORCID: https://orcid.org/0000-0002-7027-7668)
- Chuang Meng (ORCID: https://orcid.org/0000-0001-6436-1321)
- Yuting Zhang (ORCID: https://orcid.org/0009-0004-2182-679X)
- Wenxiang Zhang (ORCID: https://orcid.org/0000-0003-0141-0477)
- Junbo Zhang (ORCID: https://orcid.org/0000-0003-3549-6483)
- Mingguo Xu
- Aodi Wu
- Jinliang Sheng (ORCID: https://orcid.org/0000-0001-6887-5581)
- Kexin Yan (ORCID: https://orcid.org/0000-0003-3892-0710)
Institutions
- Shihezi University (CN)
- Kazakh National Agrarian Research University (KZ)
- Tiandi Science & Technology (China) (CN)
- Yangzhou University (CN)
Publication Details
- Journal
- Microbial Cell Factories
- Published
- 2025-04-15
- DOI
- https://doi.org/10.1186/s12934-025-02713-0
- Citations
- 1
- Primary Topic
- Brucella: diagnosis, epidemiology, treatment
- Type
- article
- Field-Weighted Citation Impact
- 2.35
Funders
- National Natural Science Foundation of China
- Shihezi University
- Department of Education of Guizhou Province