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Fusco G, Cardillo L, Valvini O, Pucciarelli A, Picazio G, Cerrone A, Napoletano M, Pellicanò R, Ottaiano M, de Martinis C, De Falco F, Cutarelli A, Sannino E, Borriello G, Tittarelli M, Roperto S, De Carlo E. Detection and quantification of Brucella abortus DNA in water buffaloes ( bubalus bubalis) using droplet digital polymerase chain reaction. Vet Q 2024; 44:1-8. [PMID: 39148364 PMCID: PMC11328813 DOI: 10.1080/01652176.2024.2390944] [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: 10/03/2023] [Revised: 07/08/2024] [Accepted: 08/05/2024] [Indexed: 08/17/2024] Open
Abstract
Brucellosis represents a major public health concern worldwide. Human transmission is mainly due to the consumption of unpasteurized milk and dairy products of infected animals. The gold standard for the diagnosis of Brucella spp in ruminants is the bacterial isolation, but it is time-consuming. Polymerase Chain Reaction (PCR) is a quicker and more sensitive technique than bacterial culture. Droplet digital PCR (ddPCR) is a novel molecular assay showing high sensitivity in samples with low amount of DNA and lower susceptibility to amplification inhibitors. Present study aimed to develop a ddPCR protocol for the detection of Brucella abortus in buffalo tissue samples. The protocol was validated using proficiency test samples for Brucella spp by real time qPCR. Furthermore, 599 tissue samples were examined. Among reference materials, qPCR and ddPCR demonstrated same performance and were able to detect up to 225 CFU/mL. Among field samples, ddPCR showed higher sensitivity (100%), specificity and accuracy of 93.4% and 94.15%, respectively. ddPCR could be considered a promising technique to detect B. abortus in veterinary specimens, frequently characterized by low amount of bacteria, high diversity in matrices and species and poor storage conditions.
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Affiliation(s)
- Giovanna Fusco
- Department of Animal Health, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Naples, Italy
| | - Lorena Cardillo
- Department of Animal Health, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Naples, Italy
| | - Ornella Valvini
- Department of Animal Health, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Naples, Italy
| | - Alessia Pucciarelli
- Department of Animal Health, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Naples, Italy
| | - Gerardo Picazio
- Department of Animal Health, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Naples, Italy
| | - Anna Cerrone
- Department of Animal Health, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Naples, Italy
| | - Michele Napoletano
- Caserta Section, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Caserta, Italy
| | - Roberta Pellicanò
- Regional Observatory of Epidemiology and Biostatistic, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Italy
| | - Maria Ottaiano
- Regional Observatory of Epidemiology and Biostatistic, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Italy
| | - Claudio de Martinis
- Department of Animal Health, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Naples, Italy
| | - Francesca De Falco
- Department of Veterinary Medicine and Animal Productions, Università degli Studi di Napoli Federico II, Naples, Italy
| | - Anna Cutarelli
- Department of Food Inspection, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Italy
| | - Emanuela Sannino
- Department of Animal Health, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Naples, Italy
| | - Giorgia Borriello
- Department of Animal Health, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Naples, Italy
| | - Manuela Tittarelli
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise G. Caporale, Campo Boario, Italy
| | - Sante Roperto
- Department of Veterinary Medicine and Animal Productions, Università degli Studi di Napoli Federico II, Naples, Italy
| | - Esterina De Carlo
- National Reference Centre for Hygiene and Technologies of Water Buffalo Farming and Productions, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Salerno, Italy
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Mikailov MM, Gunashev SA, Yanikova EA, Halikov AA, Bulashev AK. Indirect hemagglutination assay for diagnosing brucellosis: Past, present, and future. Vet World 2024; 17:811-819. [PMID: 38798281 PMCID: PMC11111721 DOI: 10.14202/vetworld.2024.811-819] [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: 02/07/2023] [Accepted: 03/21/2024] [Indexed: 05/29/2024] Open
Abstract
Brucellosis is a zoonotic disease that causes enormous losses in livestock production worldwide and has a significant public health impact. None of the brucellosis-free countries is currently able to guarantee their ability to prevent the introduction of the pathogen due to the increase in tourism and the expansion of migration. The timely identification of infected animals is an effective means of preventing brucellosis and minimizing the epidemiological risk. The tube agglutination test, Rose Bengal plate test, complement fixation test, and enzyme-linked immunosorbent assay, which are routinely used to identify seropositive productive animals, have limitations and results that do not always correlate. The indirect hemagglutination assay (IHA) stands out among non-traditional methods because it is affordable, has a simple protocol, and is more reliable than classical serological tests, especially in cases of questionable and/or false-negative results. The diagnostic value of the IHA has long been studied by laboratories in several countries, but mostly by post-soviet research teams; therefore, the results continue to be published in Russian-language journals, ensuring that the local scientific community can access the results. In addition, the efficacy of this test for the diagnosis of brucellosis and other infectious diseases has not yet been reviewed. The purpose of this review was to summarize the results of studies on the development and use of IHA for the diagnosis of brucellosis and to determine the prospects for further improvement.
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Affiliation(s)
- M. M. Mikailov
- Laboratory of Infectious Pathology of Farm Animals, Caspian Zonal Research Veterinary Institute, Makhachkala, Dagestan, Russia
| | - Sh. A. Gunashev
- Laboratory of Infectious Pathology of Farm Animals, Caspian Zonal Research Veterinary Institute, Makhachkala, Dagestan, Russia
| | - E. A. Yanikova
- Laboratory of Infectious Pathology of Farm Animals, Caspian Zonal Research Veterinary Institute, Makhachkala, Dagestan, Russia
| | - A. A. Halikov
- Laboratory of Infectious Pathology of Farm Animals, Caspian Zonal Research Veterinary Institute, Makhachkala, Dagestan, Russia
| | - Aitbay K. Bulashev
- Department of Microbiology and Biotechnology, Faculty of Veterinary and Livestock Technology, S. Seifullin Kazakh Agrotechnical Research University, Astana, Kazakhstan
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Yang J, Wang Y, Hou Y, Sun M, Xia T, Wu X. Evasion of host defense by Brucella. CELL INSIGHT 2024; 3:100143. [PMID: 38250017 PMCID: PMC10797155 DOI: 10.1016/j.cellin.2023.100143] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/11/2023] [Accepted: 12/11/2023] [Indexed: 01/23/2024]
Abstract
Brucella , an adept intracellular pathogen, causes brucellosis, a zoonotic disease leading to significant global impacts on animal welfare and the economy. Regrettably, there is currently no approved and effective vaccine for human use. The ability of Brucella to evade host defenses is essential for establishing chronic infection and ensuring stable intracellular growth. Brucella employs various mechanisms to evade and undermine the innate and adaptive immune responses of the host through modulating the activation of pattern recognition receptors (PRRs), inflammatory responses, or the activation of immune cells like dendritic cells (DCs) to inhibit antigen presentation. Moreover, it regulates multiple cellular processes such as apoptosis, pyroptosis, and autophagy to establish persistent infection within host cells. This review summarizes the recently discovered mechanisms employed by Brucella to subvert host immune responses and research progress on vaccines, with the aim of advancing our understanding of brucellosis and facilitating the development of more effective vaccines and therapeutic approaches against Brucella .
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Affiliation(s)
- Jinke Yang
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730000, China
| | - Yue Wang
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730000, China
| | - Yuanpan Hou
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730000, China
| | - Mengyao Sun
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730000, China
| | - Tian Xia
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730000, China
| | - Xin Wu
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730000, China
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Golchin M, Mollayi S, Mohammadi E, Eskandarzade N. Development of a diagnostic indirect ELISA test for detection of Brucella antibody using recombinant outer membrane protein 16 kDa (rOMP16). VETERINARY RESEARCH FORUM : AN INTERNATIONAL QUARTERLY JOURNAL 2022; 13:387-391. [PMID: 36320311 PMCID: PMC9548234 DOI: 10.30466/vrf.2021.524590.3141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 05/08/2021] [Indexed: 11/22/2022]
Abstract
Brucellosis is considered as one of the important global zoonotic diseases that causes medical as well as economic problems especially in tropical countries. The illness has no specific pathognomonic signs; therefore, the rapid and accurate diagnosis of the disease has a very important role in preventing the Brucella spillover and treatment. The purpose of this study was to design a new indirect ELISA test for detection of human brucellosis based on using recombinant Brucella abortus outer membrane protein 16 kDa (rOMP16) as an antigen. OMP16 gene of B. abortus was initially synthesized and cloned in pET-21d vector and then expressed in Escherichia coli cells. The expression was confirmed by the SDS-PAGE, western blotting and dot blotting. The purified protein was coated in ELISA plates and an indirect ELISA was performed on 70 human serum samples. The results were evaluated with a commercial IgG ELISA kit and Rose Bengal plate agglutination tests as reference tests. Diagnostic performance of designed OMP16 ELISA test in comparison with Rose Bengal plate test revealed 100% of sensitivity, 95.00% of specificity and good Fleiss kappa agreement, whereas, where it was compared to commercial ELISA kit, it revealed very good kappa agreement with 100% of sensitivity and 100% of specificity in cut-off value of 0.13. It was concluded that OMP 16 kDa could be acceptable alternative antigen for detecting Brucella IgG antibody with high accuracy.
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Affiliation(s)
- Mehdi Golchin
- Department of Pathobiology, School of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Somayye Mollayi
- Department of Pathobiology, School of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Elham Mohammadi
- Department of Pathobiology, School of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Neda Eskandarzade
- Department of Basic Sciences, School of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran
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5
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Yao M, Guo X, Wu X, Bai Q, Sun M, Yin D. Evaluation of the Combined Use of Major Outer Membrane Proteins in the Serodiagnosis of Brucellosis. Infect Drug Resist 2022; 15:4093-4100. [PMID: 35924021 PMCID: PMC9342882 DOI: 10.2147/idr.s372411] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 07/23/2022] [Indexed: 11/23/2022] Open
Affiliation(s)
- Meixue Yao
- Center for Medical Statistics and Data Analysis, School of Public Health, Xuzhou Medical University, Xuzhou, People’s Republic of China
- Key Laboratory of Human Genetics and Environmental Medicine, School of Public Health, Xuzhou Medical University, Xuzhou, People’s Republic of China
| | - Xiaohan Guo
- Center for Medical Statistics and Data Analysis, School of Public Health, Xuzhou Medical University, Xuzhou, People’s Republic of China
- Key Laboratory of Human Genetics and Environmental Medicine, School of Public Health, Xuzhou Medical University, Xuzhou, People’s Republic of China
| | - Xiling Wu
- Center for Medical Statistics and Data Analysis, School of Public Health, Xuzhou Medical University, Xuzhou, People’s Republic of China
- Key Laboratory of Human Genetics and Environmental Medicine, School of Public Health, Xuzhou Medical University, Xuzhou, People’s Republic of China
| | - Qiongqiong Bai
- Center for Medical Statistics and Data Analysis, School of Public Health, Xuzhou Medical University, Xuzhou, People’s Republic of China
- Key Laboratory of Human Genetics and Environmental Medicine, School of Public Health, Xuzhou Medical University, Xuzhou, People’s Republic of China
| | - Mingjun Sun
- Laboratory of Zoonoses, China Animal Health and Epidemiology Center, Qingdao, People’s Republic of China
| | - Dehui Yin
- Center for Medical Statistics and Data Analysis, School of Public Health, Xuzhou Medical University, Xuzhou, People’s Republic of China
- Key Laboratory of Human Genetics and Environmental Medicine, School of Public Health, Xuzhou Medical University, Xuzhou, People’s Republic of China
- Correspondence: Dehui Yin, Key Laboratory of Human Genetics and Environmental Medicine, School of Public Health, Xuzhou Medical University, No. 129 Tongshan Road, Xuzhou, 221004, People’s Republic of China, Email
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Wang H, Chen D, Lu H. Anti-bacterial monoclonal antibodies: next generation therapy against superbugs. Appl Microbiol Biotechnol 2022; 106:3957-3972. [PMID: 35648146 DOI: 10.1007/s00253-022-11989-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 05/12/2022] [Accepted: 05/16/2022] [Indexed: 12/19/2022]
Abstract
Prior to the nineteenth century, infectious disease was one of the leading causes of death. Human life expectancy has roughly doubled over the past century as a result of the development of antibiotics and vaccines. However, the emergence of antibiotic-resistant superbugs brings new challenges. The side effects of broad-spectrum antibiotics, such as causing antimicrobial resistance and destroying the normal flora, often limit their applications. Furthermore, the development of new antibiotics has lagged far behind the emergence and spread of antibiotic resistance. On the other hand, the genome complexity of bacteria makes it difficult to create effective vaccines. Therefore, novel therapeutic agents in supplement to antibiotics and vaccines are urgently needed to improve the treatment of infections. In recent years, monoclonal antibodies (mAbs) have achieved remarkable clinical success in a variety of fields. In the treatment of infectious diseases, mAbs can play functions through multiple mechanisms, including toxins neutralization, virulence factors inhibition, complement-mediated killing activity, and opsonic phagocytosis. Toxins and bacterial surface components are good targets to generate antibodies against. The U.S. FDA has approved three monoclonal antibody drugs, and there are numerous candidates in the preclinical or clinical trial stages. This article reviews recent advances in the research and development of anti-bacterial monoclonal antibody drugs in order to provide a valuable reference for future studies in this area. KEY POINTS: • Novel drugs against antibiotic-resistant superbugs are urgently required • Monoclonal antibodies can treat bacterial infections through multiple mechanisms • There are many anti-bacterial monoclonal antibodies developed in recent years and some candidates have entered the preclinical or clinical stages of development.
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Affiliation(s)
- Hui Wang
- Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Daijie Chen
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Huili Lu
- Engineering Research Center of Cell and Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
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7
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Lopes CE, De Carli S, Feltes BC, Pinto ÉSM, Sala RDV, Dorn M, Siqueira FM. Genetic and molecular Omp25 analyses from worldwide Brucella canis strains: Possible mutational influences in protein function. Gene 2022; 817:146175. [PMID: 35031422 DOI: 10.1016/j.gene.2021.146175] [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: 09/13/2021] [Revised: 11/12/2021] [Accepted: 12/06/2021] [Indexed: 11/22/2022]
Abstract
Brucella canis is responsible for canine brucellosis, a neglected zoonotic disease. The omp25 gene has been described as an important marker for Brucella intra-species differentiation, in addition to the ability to interact with the host immune system. Therefore, this study investigated the omp25 sequence from B. canis strains associated to a phylogenetic characterization and the unveiling of the molecular structure. In vitro analyses comprised DNA extraction, PCR, and sequencing of omp25 from 19 B. canis strains. Moreover, in silico analyses were performed at nucleotide level for phylogenetic characterization and evolutionary history of B. canis omp25 gene; and in amino acid level including modeling, dynamics, and epitope prediction of B. canis Omp25 protein. Here, we identified a new mutation, L109P, which diverges the worldwide omp25 sequences in two large branches. Interestingly, this mutation appears to have epidemiology importance, based on a geographical distribution of B. canis strains. Structural and molecular dynamics analyses of Omp25 revealed that Omp25L109P does not sustain its native β-barrel. Likewise, the conformation of B-cell epitope on the mutated region was changed in Omp25L109P protein. Even without an evolutive marker, the new identified mutation appears to affect the basic function of B. canis Omp25 protein, which could indicate virulence adaptation for some B. canis strains in a context of geographical disposition.
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Affiliation(s)
- Cassiane Elisabete Lopes
- Laboratory of Veterinary Bacteriology, Veterinary School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Ciências Veterinárias, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Silvia De Carli
- Laboratory of Veterinary Bacteriology, Veterinary School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Ciências Veterinárias, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Bruno César Feltes
- Structural Bioinformatics and Computational Biology Laboratory, Institute of Informatics, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil; Department of Genetics, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil; Department of Biophysics, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Éderson Sales Moreira Pinto
- Structural Bioinformatics and Computational Biology Laboratory, Institute of Informatics, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil; Center of Biotechnology, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Rafaella Dalla Vecchia Sala
- Laboratory of Veterinary Bacteriology, Veterinary School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Márcio Dorn
- Structural Bioinformatics and Computational Biology Laboratory, Institute of Informatics, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil; National Institute of Science and Technology - Forensic Science, Porto Alegre, RS, Brazil; Center of Biotechnology, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Franciele Maboni Siqueira
- Laboratory of Veterinary Bacteriology, Veterinary School, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Ciências Veterinárias, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
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Castillo-Zeledón A, Ruiz-Villalobos N, Altamirano-Silva P, Chacón-Díaz C, Barquero-Calvo E, Chaves-Olarte E, Guzmán-Verri C. A Sinorhizobium meliloti and Agrobacterium tumefaciens ExoR ortholog is not crucial for Brucella abortus virulence. PLoS One 2021; 16:e0254568. [PMID: 34388167 PMCID: PMC8362948 DOI: 10.1371/journal.pone.0254568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 06/29/2021] [Indexed: 11/19/2022] Open
Abstract
Brucella is a facultative extracellular-intracellular pathogen that belongs to the Alphaproteobacteria class. Precise sensing of environmental changes and a proper response mediated by a gene expression regulatory network are essential for this pathogen to survive. The plant-related Alphaproteobacteria Sinorhizobium meliloti and Agrobacterium tumefaciens also alternate from a free to a host-associated life, where a regulatory invasion switch is needed for this transition. This switch is composed of a two-component regulatory system (TCS) and a global inhibitor, ExoR. In B. abortus, the BvrR/BvrS TCS is essential for intracellular survival. However, the presence of a TCS inhibitor, such as ExoR, in Brucella is still unknown. In this work, we identified a genomic sequence similar to S. meliloti exoR in the B. abortus 2308W genome, constructed an exoR mutant strain, and performed its characterization through ex vivo and in vivo assays. Our findings indicate that ExoR is related to the BvrR phosphorylation state, and is related to the expression of known BvrR/BrvS gene targets, such as virB8, vjbR, and omp25 when grown in rich medium or starving conditions. Despite this, the exoR mutant strain showed no significant differences as compared to the wild-type strain, related to resistance to polymyxin B or human non-immune serum, intracellular replication, or infectivity in a mice model. ExoR in B. abortus is related to BvrR/BvrS as observed in other Rhizobiales; however, its function seems different from that observed for its orthologs described in A. tumefaciens and S. meliloti.
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Affiliation(s)
- Amanda Castillo-Zeledón
- Programa de Investigación en Enfermedades Tropicales, Escuela de Medicina Veterinaria, Universidad Nacional de Costa Rica, Heredia, Costa Rica
| | - Nazareth Ruiz-Villalobos
- Programa de Investigación en Enfermedades Tropicales, Escuela de Medicina Veterinaria, Universidad Nacional de Costa Rica, Heredia, Costa Rica
| | - Pamela Altamirano-Silva
- Centro de Investigación en Enfermedades Tropicales, Universidad de Costa Rica, San José, Costa Rica
| | - Carlos Chacón-Díaz
- Centro de Investigación en Enfermedades Tropicales, Universidad de Costa Rica, San José, Costa Rica
| | - Elías Barquero-Calvo
- Programa de Investigación en Enfermedades Tropicales, Escuela de Medicina Veterinaria, Universidad Nacional de Costa Rica, Heredia, Costa Rica
| | - Esteban Chaves-Olarte
- Centro de Investigación en Enfermedades Tropicales, Universidad de Costa Rica, San José, Costa Rica
| | - Caterina Guzmán-Verri
- Programa de Investigación en Enfermedades Tropicales, Escuela de Medicina Veterinaria, Universidad Nacional de Costa Rica, Heredia, Costa Rica
- * E-mail:
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9
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Bai Q, Li H, Wu X, Shao J, Sun M, Yin D. Comparative analysis of the main outer membrane proteins of Brucella in the diagnosis of brucellosis. Biochem Biophys Res Commun 2021; 560:126-131. [PMID: 33989903 DOI: 10.1016/j.bbrc.2021.04.127] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 04/28/2021] [Indexed: 11/19/2022]
Abstract
Brucellosis has placed a heavy economic burden on numerous countries and has consumed considerable medical resources worldwide. To improve the specificity and sensitivity of serological methods for diagnosing brucellosis, it is important to develop new diagnostic antigens. Brucella outer membrane proteins(omps) possess good immunogenicity, but there is a scarcity of comparative studies of these proteins in the clinical diagnosis of brucellosis. In this study, six recombinant Brucella outer membrane proteins, omp10, omp16, omp19, omp25, omp31 and BP26, were expressed in prokaryotic cells and utilized as diagnostic antigens. The clinical sera of humans, bovines and goats with brucellosis were analyzed by indirect ELISA using these proteins, lipopolysaccharide(LPS) and Rose Bengale Ag, served as positive-control antigens. In diagnosing human and goat serum, BP26 exhibited the highest diagnostic accuracy of 96.45% and 95.00%, respectively, while omp31 exhibited the strongest ability to detect Brucella in bovine serum with an accuracy of 84.03%. Cross-reaction experiments also confirmed that the diagnostic specificities of omp31 and BP26 were higher than those of the LPS and Rose Bengale Ag antigens. The results of this study indicate that omp31 and BP26 are candidate antigens with high potential application value in the clinical diagnosis of brucellosis.
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Affiliation(s)
- Qiongqiong Bai
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, 221004, China
| | - Han Li
- Department of Infection Control, The First Hospital of Jilin University, Changchun, 130021, China
| | - Xiling Wu
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, 221004, China
| | - Jihong Shao
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, 221004, China
| | - Mingjun Sun
- Laboratory of Zoonoses, China Animal Health and Epidemiology Center, Qingdao, 266032, China.
| | - Dehui Yin
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, 221004, China.
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10
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Lu J, Wu Z, Liu B, Wang C, Wang Q, Zhang L, Wang Z, Chen C, Fu Y, Li C, Li T. A time-resolved fluorescence lateral flow immunoassay for rapid and quantitative serodiagnosis of Brucella infection in humans. J Pharm Biomed Anal 2021; 200:114071. [PMID: 33866295 DOI: 10.1016/j.jpba.2021.114071] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 04/09/2021] [Accepted: 04/10/2021] [Indexed: 02/06/2023]
Abstract
Brucellosis is a worldwide infectious zoonotic disease, posing severe threats to human health and social-economic development. By comparing with time-consuming, low sensitive and non-quantitative conventional serological methods, herein, protein G (prG) coupled with europium nanospheres (EuNPs) (detection probe) and highly purified Brucella lipopolysaccharide (LPS) (capture antigen) were used to develop a novel time-resolved fluorescence lateral flow immunoassay (TF-LFIA) for detecting anti-Brucella IgG antibody in human plasmas. The entire testing took 15 min. With a satisfactory purity, the purified LPS weakly cross-reacted with Y. enterocolitica O9 diagnostic antibody; however, none reacted with sera from patients with other Gram-negative bacterial infections. Following coefficient of determination (R2 = 0.9961), 0.3 IU/mL was reported as the limit of detection (LOD), much lower than those of Serological Agglutination Test (SAT), Rose-Bengal Plate Agglutination Test (RBPT) and colloidal gold LFIA (CG-LFIA). Intra-day and inter-day precisions (CV, coefficient variation) of TF-LFIA varied less than 8% or 12 %, while intra-day and inter-day accuracies were 94-106 % or 93-107 %, respectively. The correlation coefficient (R2) of TF-LFIA measurement to the different concentrations of spiked Brucella antibody was 0.9967, suggesting TF-LFIA had high reliability and reproducibility. TF-LFIA was demonstrated for 100 % specificity, 98.57 % sensitivity and 99.63 % accuracy in detection of Brucella antibody from clinical samples, respectively, significantly higher compared to SAT and RBPT. In conclusion, the established TF-LFIA is a simple, rapid and quantitative immunoassay for early diagnosis or epidemiological surveillance of Brucella infection in humans.
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Affiliation(s)
- Jinhui Lu
- Department of Transfusion Medicine, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, 510515, China
| | - Ze Wu
- Department of Transfusion Medicine, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, 510515, China
| | - Bochao Liu
- Department of Transfusion Medicine, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, 510515, China
| | - Cong Wang
- Department of Transfusion Medicine, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, 510515, China
| | - Qi Wang
- Department of Laboratory Medicine, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, China
| | - Ling Zhang
- Department of Transfusion Medicine, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, 510515, China
| | - Zhen Wang
- Animal Science and Technology College, Shihezi University, Shihezi, 832002, Xinjiang, China
| | - Chuangfu Chen
- Animal Science and Technology College, Shihezi University, Shihezi, 832002, Xinjiang, China
| | | | - Chengyao Li
- Department of Transfusion Medicine, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, 510515, China.
| | - Tingting Li
- Department of Transfusion Medicine, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, 510515, China.
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11
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Hillman Y, Gershberg J, Lustiger D, Even D, Braverman D, Dror Y, Ashur I, Vernick S, Sal-Man N, Wine Y. Monoclonal Antibody-Based Biosensor for Point-of-Care Detection of Type III Secretion System Expressing Pathogens. Anal Chem 2020; 93:928-935. [DOI: 10.1021/acs.analchem.0c03621] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yaron Hillman
- The Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Green building, Tel-Aviv University, Tel Aviv 6997801, Israel
| | - Jenia Gershberg
- Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O. Box 653, Beer Sheva 8410501, Israel
| | - Dan Lustiger
- The Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Green building, Tel-Aviv University, Tel Aviv 6997801, Israel
| | - Dan Even
- The Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Green building, Tel-Aviv University, Tel Aviv 6997801, Israel
| | - Dor Braverman
- Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O. Box 653, Beer Sheva 8410501, Israel
| | - Yael Dror
- The Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Green building, Tel-Aviv University, Tel Aviv 6997801, Israel
| | - Idan Ashur
- Institute of Agricultural Engineering, Agricultural Research Organization, Volcani Center, 68 Hamaccabim Rd, Rishon Lezion 5025001, Israel
| | - Sefi Vernick
- Institute of Agricultural Engineering, Agricultural Research Organization, Volcani Center, 68 Hamaccabim Rd, Rishon Lezion 5025001, Israel
| | - Neta Sal-Man
- Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O. Box 653, Beer Sheva 8410501, Israel
| | - Yariv Wine
- The Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Green building, Tel-Aviv University, Tel Aviv 6997801, Israel
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