1
|
Li M, Zhu Y, Li Z, Song J, Zhao W. Immunoprotective effect and mechanism of rEg.P29 against CD4 + T cell-deficient mice with Echinococcus multilocularis infection. Acta Biochim Biophys Sin (Shanghai) 2024; 56:482-489. [PMID: 38151996 PMCID: PMC10984858 DOI: 10.3724/abbs.2023282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 11/21/2023] [Indexed: 12/29/2023] Open
Abstract
Alveolar echinococcosis (AE) is a zoonotic parasitic disease caused by infection with the larval stage of Echinococcus multilocularis and a major challenge to human public health. Vaccines are the most effective way to prevent and control infectious diseases. We previously revealed that the Echinocuccus granulosus recombinant protein P29 is a good vaccine candidate against E. granulosus. However, the protective and immunological mechanism of rEg.P29 against E. multilocularis remain unclear. In this study, CD4 + T cell-deficient mice are transferred with spleen CD4 + T cells isolated from wild-type mice and subjected to rEg.P29 immunization, and then these immunized mice are infected with E. multilocularis. The cyst inhibition rate is calculated by weighing the body and cyst weights. The level of antibody is detected by ELISA. Flow cytometry is used to detect the level of IFN-γ production by CD4 + T and CD8 + T cells. The cytokines in culture supernatant are detected by ELISA. The expressions of CD44 and CD62L on memory T cells are determined by flow cytometry. The results show the cyst inhibition rate is 41.52% after adoptive transfer of CD4 + T cells. Furthermore, the levels of IgG, IgM, IgA and IgE in serum are significantly increased compared with those in the PBS group. The IFN-γ-secretion by CD8 + T cells and the level of IFN-γ in culture supernatant are obviously increased; and the number of CD4 + T cells is increased, but the number of IFN-γ producing CD4 + T cells has no significant difference compared with PBS group. In addition, the number of CD44 +CD62L ‒CD8 + memory T cells in the spleen is significantly increased, while the number of CD44 ‒CD62L + CD8 + memory T cells is not significantly altered. Collectively, rEg.P29 can alleviate E. multilocularis infection by inducing humoral immune responses and CD8 + T cell responses.
Collapse
Affiliation(s)
- Ming Li
- Department of Hepatobiliary SurgeryNingxia Medical University General HospitalYinchuan750004China
| | - Yazhou Zhu
- Department of Medical Immunology and Pathogen BiologyNingxia Medical UniversityYinchuan750004China
| | - Zihua Li
- Ningxia Key Laboratory of Prevention and Control of Common Infectious DiseaseNingxia Medical UniversityYinchuan750004China
| | - Jiahui Song
- Ningxia Key Laboratory of Prevention and Control of Common Infectious DiseaseNingxia Medical UniversityYinchuan750004China
| | - Wei Zhao
- Department of Medical Immunology and Pathogen BiologyNingxia Medical UniversityYinchuan750004China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious DiseaseNingxia Medical UniversityYinchuan750004China
| |
Collapse
|
2
|
Wen J, Li Z, Lv Y, Ding S, Zhu Y, Yang J, Tang J, Zhu M, Zhao Y, Zhao W. A subunit vaccine based on Brucella rBP26 induces Th1 immune responses and M1 macrophage activation. Acta Biochim Biophys Sin (Shanghai) 2024; 56:879-891. [PMID: 38419498 DOI: 10.3724/abbs.2024023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024] Open
Abstract
Brucellosis is a global zoonotic infection caused by Brucella bacteria, which poses a significant burden on society. While transmission prevention is currently the most effective method, the absence of a licenced vaccine for humans necessitates the urgent development of a safe and effective vaccine. Recombinant protein-based subunit vaccines are considered promising options, and in this study, the Brucella BP26 protein is expressed using prokaryotic expression systems. The immune responses are evaluated using the well-established adjuvant CpG-ODN. The results demonstrate that rBP26 supplemented with a CpG adjuvant induces M1 macrophage polarization and stimulates cellular immune responses mediated by Th1 cells and CD8 + T cells. Additionally, it generates high levels of rBP26-specific antibodies in immunized mice. Furthermore, rBP26 immunization activates, proliferates, and produces cytokines in T lymphocytes while also maintaining immune memory for an extended period of time. These findings shed light on the potential biological function of rBP26, which is crucial for understanding brucellosis pathogenesis. Moreover, rBP26 holds promise as an effective subunit vaccine candidate for use in endemic areas.
Collapse
Affiliation(s)
- Jia Wen
- School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
- General Medicine Department, General Hospital of Ningxia Medical University, Yinchuan 750004, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China
| | - Zihua Li
- School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China
| | - Yongxue Lv
- School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China
| | - Shuqin Ding
- School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China
| | - Yazhou Zhu
- School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China
| | - Jihui Yang
- School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China
| | - Jing Tang
- School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China
| | - Mingxing Zhu
- School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China
| | - Yinqi Zhao
- School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China
| | - Wei Zhao
- School of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan 750004, China
| |
Collapse
|
3
|
Yang J, Zhao Y, Fu Y, Lv Y, Zhu Y, Zhu M, Zhao J, Wang Y, Wu C, Zhao W. Recombinant antigen P29 of Echinococcus granulosus induces Th1, Tc1, and Th17 cell immune responses in sheep. Front Immunol 2023; 14:1243204. [PMID: 38187382 PMCID: PMC10768560 DOI: 10.3389/fimmu.2023.1243204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 11/22/2023] [Indexed: 01/09/2024] Open
Abstract
Echinococcosis is a common human and animal parasitic disease that seriously endangers human health and animal husbandry. Although studies have been conducted on vaccines for echinococcosis, to date, there is no human vaccine available for use. One of the main reasons for this is the lack of in-depth research on basic immunization with vaccines. Our previous results confirmed that recombinant antigen P29 (rEg.P29) induced more than 90% immune protection in both mice and sheep, but data on its induction of sheep-associated cellular immune responses are lacking. In this study, we investigated the changes in CD4+ T cells, CD8+ T cells, and antigen-specific cytokines IFN-γ, IL-4, and IL-17A after rEg.P29 immunization using enzyme-linked immunospot assay (ELISPOT), enzyme-linked immunosorbent assay (ELISA), and flow cytometry to investigate the cellular immune response induced by rEg.P29 in sheep. It was found that rEg.P29 immunization did not affect the percentage of CD4+ and CD8+ T cells in peripheral blood mononuclear cells (PBMCs), and was able to stimulate the proliferation of CD4+ and CD8+ T cells after immunization in vitro. Importantly, the results of both ELISPOT and ELISA showed that rEg.P29 can induce the production of the specific cytokines IFN-γ and IL-17A, and flow cytometry verified that rEg.P29 can induce the expression of IFN-γ in CD4+ and CD8+ T cells and IL-17A in CD4+ T cells; however, no IL-4 expression was observed. These results indicate that rEg.P29 can induce Th1, Th17, and Tc1 cellular immune responses in sheep against echinococcosis infection, providing theoretical support for the translation of rEg.P29 vaccine applications.
Collapse
Affiliation(s)
- Jihui Yang
- Center of Scientific Technology of Ningxia Medical University, Yinchuan, China
- Ningxia Key Laboratory of Prevention and Treatment of Common Infectious Diseases of Ningxia Medical University, Yinchuan, China
| | - Yinqi Zhao
- Center of Scientific Technology of Ningxia Medical University, Yinchuan, China
- Ningxia Key Laboratory of Prevention and Treatment of Common Infectious Diseases of Ningxia Medical University, Yinchuan, China
| | - Yong Fu
- Qinghai Academy of Animal Sciences and Veterinary Medicine, Qinghai University, Xining, China
| | - Yongxue Lv
- Ningxia Key Laboratory of Prevention and Treatment of Common Infectious Diseases of Ningxia Medical University, Yinchuan, China
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China
| | - Yazhou Zhu
- Ningxia Key Laboratory of Prevention and Treatment of Common Infectious Diseases of Ningxia Medical University, Yinchuan, China
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China
| | - Mingxing Zhu
- Center of Scientific Technology of Ningxia Medical University, Yinchuan, China
- Ningxia Key Laboratory of Prevention and Treatment of Common Infectious Diseases of Ningxia Medical University, Yinchuan, China
| | - Jiaqing Zhao
- Center of Scientific Technology of Ningxia Medical University, Yinchuan, China
- Ningxia Key Laboratory of Prevention and Treatment of Common Infectious Diseases of Ningxia Medical University, Yinchuan, China
| | - Yana Wang
- Ningxia Key Laboratory of Prevention and Treatment of Common Infectious Diseases of Ningxia Medical University, Yinchuan, China
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China
| | - Changyou Wu
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Wei Zhao
- Center of Scientific Technology of Ningxia Medical University, Yinchuan, China
- Ningxia Key Laboratory of Prevention and Treatment of Common Infectious Diseases of Ningxia Medical University, Yinchuan, China
| |
Collapse
|
4
|
Lv Y, Chang L, Yang J, Wen J, Zhao Y, Zhu M, Wu C, Zhao W. Immunogenicity of peptide-based vaccine composed of epitopes from Echinococcus granulosus rEg.P29. FASEB J 2023; 37:e22819. [PMID: 36848174 DOI: 10.1096/fj.202201636r] [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: 10/09/2022] [Revised: 12/29/2022] [Accepted: 01/30/2023] [Indexed: 03/01/2023]
Abstract
Echinococcus granulosus is one of the main causes of economic loss in the livestock industry because of its food-borne transmission. Cutting off the transmission route is a valid prevention method, and vaccines are the most effective means of controlling and eliminating infectious diseases. However, no human-related vaccine has been yet marketed. As a genetic engineering vaccine, recombinant protein P29 of E. granulosus (rEg.P29) could provide protection against deadly challenges. In this study, we generated peptide vaccines (rEg.P29T , rEg.P29B , and rEg.P29T+B ) based on rEg.P29 and an immunized model was established by subcutaneous immunization. Further evaluation showed that peptide vaccine immunization in mice induced T helper type 1 (Th1)-mediated cellular immune responses, leading to high levels of rEg.P29 or rEg.P29B -specific antibodies. In addition, rEg.P29T+B immunization can induce a higher antibody and cytokine production level than single-epitope vaccines, and immune memory is also longer. Collectively, these results suggest that rEg.P29T+B has the potential to be developed as an efficient subunit vaccine for use in areas where E. granulosus is endemic.
Collapse
Affiliation(s)
- Yongxue Lv
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China.,Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan, China
| | - Liangliang Chang
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China.,Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan, China
| | - Jihui Yang
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan, China
| | - Jia Wen
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China.,Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan, China
| | - Yinqi Zhao
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan, China
| | - Mingxing Zhu
- Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan, China
| | - Changyou Wu
- Institute of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Wei Zhao
- School of Basic Medicine, Ningxia Medical University, Yinchuan, China.,Ningxia Key Laboratory of Prevention and Control of Common Infectious Diseases, Ningxia Hui Autonomous Region, Yinchuan, China
| |
Collapse
|