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Yazdani Z, Rafiei A, Ghoreyshi M, Abediankenari S. In Silico Analysis of a Candidate Multi-epitope Peptide Vaccine Against Human Brucellosis. Mol Biotechnol 2024; 66:769-783. [PMID: 36940016 PMCID: PMC10026239 DOI: 10.1007/s12033-023-00698-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 02/13/2023] [Indexed: 03/21/2023]
Abstract
Brucellosis is one of the neglected endemic zoonoses in the world. Vaccination appears to be a promising health strategy to prevent it. This study used advanced computational techniques to develop a potent multi-epitope vaccine for human brucellosis. Seven epitopes from four main brucella species that infect humans were selected. They had significant potential to induce cellular and humoral responses. They showed high antigenic ability without the allergenic characteristic. In order to improve its immunogenicity, suitable adjuvants were also added to the structure of the vaccine. The physicochemical and immunological properties of the vaccine were evaluated. Then its two and three-dimensional structure was predicted. The vaccine was docked with toll-like receptor4 to assess its ability to stimulate innate immune responses. For successful expression of the vaccine protein in Escherichia coli, in silico cloning, codon optimization, and mRNA stability were evaluated. The immune simulation was performed to reveal the immune response profile of the vaccine after injection. The designed vaccine showed the high ability to induce immune response, especially cellular responses to human brucellosis. It showed the appropriate physicochemical properties, a high-quality structure, and a high potential for expression in a prokaryotic system.
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Affiliation(s)
- Zahra Yazdani
- Department of Immunology, Molecular and Cell Biology Research Center, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
- Students Research Committee, Mazandaran University of Medical Sciences, Sari, Iran
| | - Alireza Rafiei
- Department of Immunology, Molecular and Cell Biology Research Center, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
| | - Mehrafarin Ghoreyshi
- Students Research Committee, Mazandaran University of Medical Sciences, Sari, Iran
| | - Saeid Abediankenari
- Immunogenetics Research Center, Department of Immunology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
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Yin D, Bai Q, Wu X, Li H, Shao J, Sun M, Zhang J. A Multi-Epitope Fusion Protein-Based p-ELISA Method for Diagnosing Bovine and Goat Brucellosis. Front Vet Sci 2021; 8:708008. [PMID: 34568475 PMCID: PMC8455990 DOI: 10.3389/fvets.2021.708008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 07/09/2021] [Indexed: 11/22/2022] Open
Abstract
In recent years, the incidence of brucellosis has increased annually, causing tremendous economic losses to animal husbandry in a lot of countries. Therefore, developing rapid, sensitive, and specific diagnostic techniques is critical to control the spread of brucellosis. In this study, bioinformatics technology was used to predict the B cell epitopes of the main outer membrane proteins of Brucella, and the diagnostic efficacy of each epitope was verified by an indirect enzyme-linked immunosorbent assay (iELISA). Then, a fusion protein containing 22 verified epitopes was prokaryotically expressed and used as an antigen in paper-based ELISA (p-ELISA) for serodiagnosis of brucellosis. The multi-epitope-based p-ELISA was evaluated using a collection of brucellosis-positive and -negative sera collected from bovine and goat, respectively. Receiver operating characteristic (ROC) curve analysis showed that the sensitivity and specificity of detection-ELISA in diagnosing goat brucellosis were 98.85 and 98.51%. The positive and the negative predictive values were 99.29 and 98.15%, respectively. In diagnosing bovine brucellosis, the sensitivity and specificity of this method were 97.85 and 96.61%, with the positive and negative predictive values being identified as 98.28 and 97.33%, respectively. This study demonstrated that the B cell epitopes contained in major antigenic proteins of Brucella can be a very useful antigen source in developing a highly sensitive and specific method for serodiagnosis of brucellosis.
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Affiliation(s)
- Dehui Yin
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, China
| | - Qiongqiong Bai
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, China
| | - Xiling Wu
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, China
| | - Han Li
- Department of Infection Control, The First Hospital of Jilin University, Changchun, China
| | - Jihong Shao
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, China
| | - Mingjun Sun
- Laboratory of Zoonoses, China Animal Health and Epidemiology Center, Qingdao, China
| | - Jinpeng Zhang
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, China
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Yin D, Bai Q, Wu X, Li H, Shao J, Sun M, Jiang H, Zhang J. Paper-based ELISA diagnosis technology for human brucellosis based on a multiepitope fusion protein. PLoS Negl Trop Dis 2021; 15:e0009695. [PMID: 34403421 PMCID: PMC8396774 DOI: 10.1371/journal.pntd.0009695] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 08/27/2021] [Accepted: 07/31/2021] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Brucellosis, as a serious zoonotic infectious disease, has been recognized as a re-emerging disease in the developing countries worldwide. In china, the incidence of brucellosis is increasing each year, seriously threatening the health of humans as well as animal populations. Despite a quite number of diagnostic methods currently being used for brucellosis, innovative technologies are still needed for its rapid and accurate diagnosis, especially in area where traditional diagnostic is unavailable. METHODOLOGY/PRINCIPAL FINDINGS In this study, a total of 22 B cell linear epitopes were predicted from five Brucella outer membrane proteins (OMPs) using an immunoinformatic approach. These epitopes were then chemically synthesized, and with the method of indirect ELISA (iELISA), each of them displayed a certain degree of capability in identifying human brucellosis positive sera. Subsequently, a fusion protein consisting of the 22 predicted epitopes was prokaryotically expressed and used as diagnostic antigen in a newly established brucellosis testing method, nano-ZnO modified paper-based ELISA (nano-p-ELISA). According to the verifying test using a collection of sera collected from brucellosis and non-brucellosis patients, the sensitivity and specificity of multiepitope based nano-p-ELISA were 92.38% and 98.35% respectively. The positive predictive value was 98.26% and the negative predictive value was 91.67%. The multiepitope based fusion protein also displayed significantly higher specificity than Brucella lipopolysaccharide (LPS) antigen. CONCLUSIONS B cell epitopes are important candidates for serologically testing brucellosis. Multiepitope fusion protein based nano-p-ELISA displayed significantly sensitivity and specificity compared to Brucella LPS antigen. The strategy applied in this study will be helpful to develop rapid and accurate diagnostic method for brucellosis in human as well as animal populations.
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Affiliation(s)
- Dehui Yin
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, China
| | - Qiongqiong Bai
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, China
| | - Xiling Wu
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, China
| | - Han Li
- Department of Infection Control, the First Hospital of Jilin University, Changchun, China
| | - Jihong Shao
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, China
| | - Mingjun Sun
- Laboratory of Zoonoses, China Animal Health and Epidemiology Center, Qingdao, China
- * E-mail: (MS); (HJ); (JZ)
| | - Hai Jiang
- State Key Laboratory for Infectious Disease Prevention and Control, Chinese Center for Disease Control and Prevention, Beijing, China
- * E-mail: (MS); (HJ); (JZ)
| | - Jingpeng Zhang
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, China
- * E-mail: (MS); (HJ); (JZ)
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Rezaei M, Rabbani-Khorasgani M, Zarkesh-Esfahani SH, Emamzadeh R, Abtahi H. Lactococcus-based vaccine against brucellosis: IgG immune response in mice with rOmp16-IL2 fusion protein. Arch Microbiol 2021; 203:2591-2596. [PMID: 33689001 DOI: 10.1007/s00203-021-02241-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 07/10/2020] [Accepted: 02/12/2021] [Indexed: 01/18/2023]
Abstract
This study was designed to introduce the recombinant Lactococcus lactis MG1363 as a cell factory candidate for production of recombinant Brucella melitensis Omp16-Human IL2 (r-Omp16-IL2) and to suggest it as a promising safe, non-pathogenic mucosal live vaccine against brucellosis. Three groups of BALB/c mice (10 mice per group) were intragastrically administrated with phosphate-buffered saline (PBS), L. lactis harboring the empty pAMJ2008 plasmid and with L. lactis expressing rOmp-IL2. The first two groups were classified as control groups and the third one is indicated as treatment group. Another group was injected by the intraperitoneal (i.p.) route with purified rOmp16-IL2 protein. The total serum IgG of each group was assessed with indirect ELISAs at two days before immunization and also two weeks after the last immunization. Results showed that BALB/c mice intragastrically administrated with L. lactis expressing rOmp-IL2 had dominant IgG response compared to the control (PBS administrated) group (P < 0.05). The level of IgG was significantly increased by intraperitoneally injection of recombinant Omp-IL2 in adjuvant compared to the intragastrically administration of PBS and L. lactis/pAMJ2008 as control groups, and also compared to L. lactis/pAMJ2008-rOmp-IL2 (P < 0.05). Our findings provide the use of L. lactis rOmp16-IL2 as a new promising alternative safe strategy than presently live attenuated vaccines toward developing an oral vaccine or subunit-based vaccine against brucellosis.
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Affiliation(s)
- Marzieh Rezaei
- Department of Cell & Molecular Biology and Microbiology, Faculty of Science and Biotechnology, University of Isfahan, 817467344, Isfahan, Islamic Republic of Iran
| | - Mohammad Rabbani-Khorasgani
- Department of Cell & Molecular Biology and Microbiology, Faculty of Science and Biotechnology, University of Isfahan, 817467344, Isfahan, Islamic Republic of Iran.
| | - Sayyed Hamid Zarkesh-Esfahani
- Department of Cell & Molecular Biology and Microbiology, Faculty of Science and Biotechnology, University of Isfahan, 817467344, Isfahan, Islamic Republic of Iran
| | - Rahman Emamzadeh
- Department of Cell & Molecular Biology and Microbiology, Faculty of Science and Biotechnology, University of Isfahan, 817467344, Isfahan, Islamic Republic of Iran
| | - Hamid Abtahi
- Molecular and Medicine Research Center, Arak University of Medical Science, Arak, Islamic Republic of Iran
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Sha T, Li Z, Zhang C, Zhao X, Chen Z, Zhang F, Ding J. Bioinformatics analysis of candidate proteins Omp2b, P39 and BLS for Brucella multivalent epitope vaccines. Microb Pathog 2020; 147:104318. [PMID: 32531499 DOI: 10.1016/j.micpath.2020.104318] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 06/02/2020] [Accepted: 06/02/2020] [Indexed: 12/11/2022]
Abstract
This study focuses on analyzing the physicochemical properties, structural characteristics and dominant epitopes of Brucella outer membrane protein 2b (Omp2b), periplasmic binding protein (P39) and Brucella lumazine synthase (BLS) proteins by bioinformatics methods, and to provide a theoretical basis for constructing multi-epitope vaccines. The amino acid sequences of three kinds of proteins were obtained from the UniProt database. The highest frequency alleles in northern China were obtained from the AlleleFrequencies database. Analysis of the physicochemical properties of the proteins by ProtParam online software. Analysis of the secondary structure of the proteins were predicted by SOMPA online software. Using SWISS-MODEL online software constructed and analyzed the tertiary structure of the proteins. Using ABCpred, BepiPred, BCPred and SVMTrip online software analyzed linear B cell epitopes of proteins, The T cell dominant epitope of the protein was analyzed using SYFPEITHI, RANKPEP and IEDB online software. Omp2b was identified three linear B cell dominant epitopes, five CD8+ T cell dominant epitopes, and three CD4+ T cell dominant epitopes. P39 was identified three linear B cell dominant epitopes, two CD8+ T cell dominant epitopes, and two CD4+ T cell dominant epitopes. BLS was identified one linear B cell dominant epitope, one CD8+ T cell dominant epitope, and two CD4+ T cell dominant epitopes. The results indicated that epitope prediction of three Brucella vaccine candidate proteins can provide a theoretical basis for the construction of an ideal multivalent epitope vaccine against Brucella.
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Affiliation(s)
- Tong Sha
- State Key Laboratory of Pathogenesis, Prevention, Treatment of Central Asian High Incidence Diseases, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China; Basic Medical College, Xinjiang Medical University, Urumqi, China
| | - Zhiwei Li
- State Key Laboratory of Pathogenesis, Prevention, Treatment of Central Asian High Incidence Diseases, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China; Clinical Laboratory Center, Xinjiang Uygur Autonomous Region People's Hospital, Urumqi, China
| | - Chuntao Zhang
- Basic Medical College, Xinjiang Medical University, Urumqi, China
| | - Xiao Zhao
- Basic Medical College, Xinjiang Medical University, Urumqi, China
| | - Zhiqiang Chen
- Basic Medical College, Xinjiang Medical University, Urumqi, China
| | - Fengbo Zhang
- State Key Laboratory of Pathogenesis, Prevention, Treatment of Central Asian High Incidence Diseases, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China; Department of Clinical Laboratory, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China.
| | - Jianbing Ding
- State Key Laboratory of Pathogenesis, Prevention, Treatment of Central Asian High Incidence Diseases, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China; Basic Medical College, Xinjiang Medical University, Urumqi, China.
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Rezaei M, Rabbani Khorasgani M, Zarkesh Esfahani SH, Emamzadeh R, Abtahi H. Production of Brucella melitensis Omp16 protein fused to the human interleukin 2 in Lactococcus lactis MG1363 toward developing a Lactococcus-based vaccine against brucellosis. Can J Microbiol 2019; 66:39-45. [PMID: 31574230 DOI: 10.1139/cjm-2019-0261] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The use of the food-grade bacterium Lactococcus lactis as a new cell factory is a promising alternative expression system for producing a desired protein. The Omp16-IL2 fusion protein antigen was cloned, expressed, and purified in this study. The Omp16-IL2 fusion gene was designed and cloned in pGH plasmid with appropriate restriction sites and subcloned in pAMJ2008 expression vector digested with the same enzymes. The purified recombinant constructed pAMJ-rOmp-IL2 was introduced into L. lactis subsp. cremoris MG1363 by electrotransformation. Finally, the expression and purification of Omp16-IL2 fusion protein was investigated. This study reports the construction of a recombinant L. lactis expressing the Omp16-IL2 fusion protein as an oral Lactococcus-based vaccine, as compared with commonly used live attenuated vaccines, for future studies against brucellosis.
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Affiliation(s)
- Marzieh Rezaei
- Department of Biology, Faculty of Science, University of Isfahan, Isfahan, Islamic Republic of Iran
| | | | | | - Rahman Emamzadeh
- Department of Biology, Faculty of Science, University of Isfahan, Isfahan, Islamic Republic of Iran
| | - Hamid Abtahi
- Molecular and Medicine Research Center, Arak University of Medical Science, Arak, Islamic Republic of Iran
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Gheibi A, Khanahmad H, Kashfi K, Sarmadi M, Khorramizadeh MR. Development of new generation of vaccines for Brucella abortus. Heliyon 2018; 4:e01079. [PMID: 30603712 PMCID: PMC6307385 DOI: 10.1016/j.heliyon.2018.e01079] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 12/17/2018] [Accepted: 12/18/2018] [Indexed: 01/18/2023] Open
Abstract
Brucella abortus is a Gram-negative facultative and intracellular bacteria, it causes bovine brucellosis, a zoonotic disease that is responsible for considerable economic loss to owners of domesticated animals and can cause problems in otherwise healthy humans. There are a few available live attenuated vaccines for animal immunization against brucellosis; however, these have significant side effects and offer insufficient protective efficacy. Thus, the need for more research into the Molecular pathobiology and immunological properties of B. abortus that would lead to the development of better and safer vaccines. In this paper we have reviewed the main aspects of the pathology and the responsive immunological mechanisms, we have also covered current and new prospective vaccines against B. abortus.
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Affiliation(s)
- Azam Gheibi
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine (SATiM), Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Khanahmad
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Khosrow Kashfi
- Department of Molecular, Cellular and Biomedical Sciences, Sophie Davis School of Biomedical Education, City University of New York School of Medicine, New York, USA
| | - Mahdieh Sarmadi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Reza Khorramizadeh
- Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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