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Xiao J, Zheng R, Bai X, Pu J, Chen H, Gu X, Xie Y, He R, Xu J, Jing B, Peng X, Yang G. Preliminary evaluation of the protective effects of recombinant AMA1 and IMP1 against Eimeria stiedae infection in rabbits. Parasit Vectors 2022; 15:400. [PMID: 36316714 PMCID: PMC9623944 DOI: 10.1186/s13071-022-05492-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 09/16/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Eimeria stiedae parasitizes the bile duct, causing hepatic coccidiosis in rabbits. Coccidiosis control using anticoccidials led to drug resistance and residues; therefore, vaccines are required as an alternative control strategy. Apical membrane antigen 1 (AMA1) and immune mapped protein 1 (IMP1) are surface-located proteins that might contribute to host cell invasion, having potential as candidate vaccine antigens. METHODS Herein, we cloned and expressed the E. stiedae EsAMA1 and EsIMP1 genes. The reactogenicity of recombinant AMA1 (rEsAMA1) and IMP1 (rEsIMP1) proteins were investigated using immunoblotting. For the vaccination-infection trial, rabbits were vaccinated with rEsAMA1 and rEsIMP1 (both 100 μg/rabbit) twice at 2-week intervals. After vaccination, various serum cytokines were measured. The protective effects of rEsAMA1 and rEsIMP1 against E. stiedae infection were assessed using several indicators. Sera were collected weekly to detect the specific antibody levels. RESULTS Both rEsAMA1 and rEsIMP1 showed strong reactogenicity. Rabbits vaccinated with rEsAMA1 and rEsIMP1 displayed significantly increased serum IL-2 (F (4, 25) = 9.53, P = 0.000), IL-4 (F (4, 25) = 7.81, P = 0.000), IL-17 (F (4, 25) = 8.55, P = 0.000), and IFN-γ (F (4, 25) = 6.89, P = 0.001) levels; in the rEsIMP1 group, serum TGF-β1 level was also elevated (F (4, 25) = 3.01, P = 0.037). After vaccination, the specific antibody levels increased and were maintained at a high level. The vaccination-infection trial showed that compared with the positive control groups, rabbits vaccinated with the recombinant proteins showed significantly reduced oocyst output (F (5, 54) = 187.87, P = 0.000), liver index (F (5, 54) = 37.52, P = 0.000), and feed conversion ratio; body weight gain was significantly improved (F (5, 54) = 28.82, P = 0.000). CONCLUSIONS rEsAMA1 and rEsIMP1 could induce cellular and humoral immunity, protecting against E. stiedae infection. Thus, rEsAMA1 and rEsIMP1 are potential vaccine candidates against E. stiedae.
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Affiliation(s)
- Jie Xiao
- grid.80510.3c0000 0001 0185 3134Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Ruoyu Zheng
- grid.80510.3c0000 0001 0185 3134Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Xin Bai
- grid.80510.3c0000 0001 0185 3134Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Jiayan Pu
- grid.80510.3c0000 0001 0185 3134Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Hao Chen
- grid.80510.3c0000 0001 0185 3134Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Xiaobin Gu
- grid.80510.3c0000 0001 0185 3134Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Yue Xie
- grid.80510.3c0000 0001 0185 3134Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Ran He
- grid.80510.3c0000 0001 0185 3134Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Jing Xu
- grid.80510.3c0000 0001 0185 3134Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Bo Jing
- grid.80510.3c0000 0001 0185 3134Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Xuerong Peng
- grid.80510.3c0000 0001 0185 3134Department of Chemistry, College of Life and Basic Science, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Guangyou Yang
- grid.80510.3c0000 0001 0185 3134Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
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Song H, Dong R, Qiu B, Jing J, Zhu S, Liu C, Jiang Y, Wu L, Wang S, Miao J, Shao Y. Potential Vaccine Targets against Rabbit Coccidiosis by Immunoproteomic Analysis. Korean J Parasitol 2017; 55:15-20. [PMID: 28285502 PMCID: PMC5365254 DOI: 10.3347/kjp.2017.55.1.15] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 10/06/2016] [Accepted: 11/29/2016] [Indexed: 11/23/2022]
Abstract
The aim of this study was to identify antigens for a vaccine or drug target to control rabbit coccidiosis. A combination of 2-dimensional electrophoresis, immunoblotting, and mass spectrometric analysis were used to identify novel antigens from the sporozoites of Eimeria stiedae. Protein spots were recognized by the sera of New Zealand rabbits infected artificially with E. stiedae. The proteins were characterized by matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF/TOF-MS) analysis in combination with bioinformatics. Approximately 868 protein spots were detected by silver-staining, and a total of 41 immunoreactive protein spots were recognized by anti-E. stiedae sera. Finally, 23 protein spots were successfully identified. The proteins such as heat shock protein 70 and aspartyl protease may have potential as immunodiagnostic or vaccine antigens. The immunoreactive proteins were found to possess a wide range of biological functions. This study is the first to report the proteins recognized by sera of infected rabbits with E. stiedae, which might be helpful in identifying potential targets for vaccine development to control rabbit coccidiosis.
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Affiliation(s)
- Hongyan Song
- Laboratory Animal Center of Nantong University, Nantong 226001, China
| | - Ronglian Dong
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 21009, China
| | - Baofeng Qiu
- Nantong Entry-Exit Inspection and Quarantine Bureau, Nantong 226004, China
| | - Jin Jing
- Laboratory Animal Center of Nantong University, Nantong 226001, China
| | - Shunxing Zhu
- Laboratory Animal Center of Nantong University, Nantong 226001, China
| | - Chun Liu
- Laboratory Animal Center of Nantong University, Nantong 226001, China
| | - Yingmei Jiang
- Laboratory Animal Center of Nantong University, Nantong 226001, China
| | - Liucheng Wu
- Laboratory Animal Center of Nantong University, Nantong 226001, China
| | - Shengcun Wang
- Laboratory Animal Center of Nantong University, Nantong 226001, China
| | - Jin Miao
- Laboratory Animal Center of Nantong University, Nantong 226001, China
| | - Yixiang Shao
- Laboratory Animal Center of Nantong University, Nantong 226001, China
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