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Huynh DT, Nolfi E, Medfai L, van Ulsen P, Jong WSP, Sijts AJAM, Luirink J. Intranasal delivery of Salmonella OMVs decorated with Chlamydia trachomatis antigens induces specific local and systemic immune responses. Hum Vaccin Immunother 2024; 20:2330768. [PMID: 38517203 PMCID: PMC10962599 DOI: 10.1080/21645515.2024.2330768] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 03/12/2024] [Indexed: 03/23/2024] Open
Abstract
Chlamydia trachomatis is an obligate intracellular pathogen responsible for the most prevalent bacterial sexually transmitted disease globally. The high prevalence of chlamydial infections underscores the urgent need for licensed and effective vaccines to prevent transmission in populations. Bacterial outer membrane vesicles (OMVs) have emerged as promising mucosal vaccine carriers due to their inherent adjuvant properties and the ability to display heterologous antigens. In this proof-of-concept study, we evaluated the immunogenicity of Salmonella OMVs decorated with C. trachomatis MOMP-derived CTH522 or HtrA antigens in mice. Following a prime-boost intranasal vaccination approach, two OMV-based C. trachomatis vaccines elicited significant humoral responses specific to the antigens in both systemic and vaginal compartments. Furthermore, we demonstrated strong antigen-specific IFN-γ and IL17a responses in splenocytes and cervical lymph node cells of vaccinated mice, indicating CD4+ Th1 and Th17 biased immune responses. Notably, the OMV-CTH522 vaccine also induced the production of spleen-derived CD8+ T cells expressing IFN-γ. In conclusion, these results highlight the potential of OMV-based C. trachomatis vaccines for successful use in future challenge studies and demonstrate the suitability of our modular OMV platform for intranasal vaccine applications.
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Affiliation(s)
- Dung T. Huynh
- R&D department, Abera Bioscience AB, Uppsala, Sweden
- Group of Molecular Microbiology, Amsterdam Institute for Life and Environment (A-LIFE), Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Emanuele Nolfi
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Lobna Medfai
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Peter van Ulsen
- Group of Molecular Microbiology, Amsterdam Institute for Life and Environment (A-LIFE), Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | | | - Alice J. A. M. Sijts
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Joen Luirink
- R&D department, Abera Bioscience AB, Uppsala, Sweden
- Group of Molecular Microbiology, Amsterdam Institute for Life and Environment (A-LIFE), Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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2
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Guo S, Wan Q, Xu M, Chen M, Chen Z. Transcriptome analysis of host anti-Aeromonas hydrophila infection revealed the pathogenicity of A. hydrophila to American eels (Anguilla rostrata). Fish & Shellfish Immunology 2024; 148:109504. [PMID: 38508539 DOI: 10.1016/j.fsi.2024.109504] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 03/10/2024] [Accepted: 03/11/2024] [Indexed: 03/22/2024]
Abstract
Aeromonas hydrophila is a commonly pathogenic bacterium in cultivated eels, but its pathogenicity to American eel (Anguilla rostrata) and the molecular mechanism of host anti-A. hydrophila infection remains uncertain. In this study, LD50 of A. hydrophila to American eels was determined and bacterial load in the liver and kidney of eels was assessed post 2.56 doses of LD50 of A. hydrophila infection. The results showed that the LD50 of A. hydrophila to American eels was determined to be 3.9 × 105 cfu/g body weight (7.8 × 106 cfu/fish), and the bacterial load peaked at 36 h post the infection (hpi) in the liver. Then, the histopathology was highlighted by congestion in splenic blood vessels, atrophied glomeruli, and necrotic hepatocytes. Additionally, the results of qRT-PCR revealed that 18 host immune-related genes showed significantly up or downregulated post-infection compare to that of pre-infection. Finally, results of the RNA-seq revealed 10 hub DEGs and 7 encoded proteins play essential role to the anti-A. hydrophila infection in American eels. Pathogenicity of A. hydrophila to American eels and RNA-seq of host anti-A. hydrophila infection were firstly reported in this study, shedding new light on our understanding of the A. hydrophila pathogenesis and the host immune response to the A. hydrophila infection strategies in gene transcript.
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Affiliation(s)
- Songlin Guo
- Fisheries College, Jimei University, China; Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PR China, Xiamen, 361021, China; State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, China.
| | - Qijuan Wan
- Fisheries College, Jimei University, China; Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PR China, Xiamen, 361021, China
| | - Ming Xu
- Fisheries College, Jimei University, China
| | - Minxia Chen
- Fisheries College, Jimei University, China; Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PR China, Xiamen, 361021, China
| | - Zihao Chen
- Fisheries College, Jimei University, China; Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PR China, Xiamen, 361021, China
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Wang Z, Wang M, Wang F, Luo Y, Liu H, Zhu Z, Huang X, Hua L, Chen H, Wu B, Peng Z. Dendritic cell targeting peptide plus Salmonella FliCd flagellin fused outer membrane protein H (OmpH) demonstrated increased efficacy against infections caused by different Pasteurella multocida serogroups in mouse models. Vaccine 2024; 42:3075-3083. [PMID: 38584060 DOI: 10.1016/j.vaccine.2024.04.020] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 03/29/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
As the major outer membrane protein (OMP) presents in the Pasteurella multocida envelope, OmpH was frequently expressed for laboratory assessments of its immunogenicity against P. multocida infections, but the results are not good. In this study, we modified OmpH with dendritic cell targeting peptide (Depeps) and/or Salmonella FliCd flagellin, and expressed three types of recombinant proteins with the MBP tag (rDepeps-FliC-OmpH-MBP, rDepeps-OmpH-MBP, rFliC-OmpH-MBP). Assessments in mouse models revealed that vaccination with rDepeps-FliC-OmpH-MBP, rDepeps-OmpH-MBP, or rFliC-OmpH-MBP induced significant higher level of antibodies as well as IFN-γ and IL-4 in murine sera than vaccination with rOmpH-MBP (P < 0.5). Vaccination with the three modified proteins also provided increased protection (rDepeps-FliC-OmpH-MBP, 70 %; rDepeps-OmpH-MBP, 50 %; rFliC-OmpH-MBP, 60 %) against P. multocida serotype D compared to vaccination with rOmpH-MBP (30 %). In mice vaccinated with different types of modified OmpHs, a significantly decreased bacterial strains were recovered from bloods, lungs, and spleens compared to rOmpH-MBP-vaccinated mice (P < 0.5). Notably, our assessments also demonstrated that vaccination with rDepeps-FliC-OmpH-MBP provided good protection against infections caused by a heterogeneous group of P. multocida serotypes (A, B, D). Our above findings indicate that modification with DCpep and Salmonella flagellin could be used as a promising strategy to improve vaccine effectiveness.
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Affiliation(s)
- Zihao Wang
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Mixue Wang
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Fei Wang
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Yajuan Luo
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Hanyuan Liu
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Zhanwei Zhu
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Xi Huang
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Lin Hua
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Huanchun Chen
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Bin Wu
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China.
| | - Zhong Peng
- National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China; Frontiers Science Center for Animal Breeding and Sustainable Production, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China.
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Vance DJ, Basir S, Piazza CL, Willsey GG, Haque HME, Tremblay JM, Rudolph MJ, Muriuki B, Cavacini L, Weis DD, Shoemaker CB, Mantis NJ. Single-domain antibodies reveal unique borrelicidal epitopes on the Lyme disease vaccine antigen, outer surface protein A (OspA). Infect Immun 2024; 92:e0008424. [PMID: 38470113 PMCID: PMC11003225 DOI: 10.1128/iai.00084-24] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 02/23/2024] [Indexed: 03/13/2024] Open
Abstract
Camelid-derived, single-domain antibodies (VHHs) have proven to be extremely powerful tools in defining the antigenic landscape of immunologically heterogeneous surface proteins. In this report, we generated a phage-displayed VHH library directed against the candidate Lyme disease vaccine antigen, outer surface protein A (OspA). Two alpacas were immunized with recombinant OspA serotype 1 from Borrelia burgdorferi sensu stricto strain B31, in combination with the canine vaccine RECOMBITEK Lyme containing lipidated OspA. The phage library was subjected to two rounds of affinity enrichment ("panning") against recombinant OspA, yielding 21 unique VHHs within two epitope bins, as determined through competition enzyme linked immunosorbent assays (ELISAs) with a panel of OspA-specific human monoclonal antibodies. Epitope refinement was conducted by hydrogen exchange-mass spectrometry. Six of the monovalent VHHs were expressed as human IgG1-Fc fusion proteins and shown to have functional properties associated with protective human monoclonal antibodies, including B. burgdorferi agglutination, outer membrane damage, and complement-dependent borreliacidal activity. The VHHs displayed unique reactivity profiles with the seven OspA serotypes associated with B. burgdorferi genospecies in the United States and Europe consistent with there being unique epitopes across OspA serotypes that should be considered when designing and evaluating multivalent Lyme disease vaccines.
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Affiliation(s)
- David J. Vance
- Division of Infectious Diseases, New York State Department of Health, Wadsworth Center, Albany, New York, USA
- Department of Biomedical Sciences, University at Albany, Albany, New York, USA
| | - Saiful Basir
- Department of Biomedical Sciences, University at Albany, Albany, New York, USA
| | - Carol Lyn Piazza
- Division of Infectious Diseases, New York State Department of Health, Wadsworth Center, Albany, New York, USA
| | - Graham G. Willsey
- Division of Infectious Diseases, New York State Department of Health, Wadsworth Center, Albany, New York, USA
| | | | - Jacque M. Tremblay
- Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, North Grafton, Massachusetts, USA
| | | | - Beatrice Muriuki
- Department of Medicine, University of Massachusetts Chan School of Medicine, Worcester, Massachusetts, USA
| | - Lisa Cavacini
- Department of Medicine, University of Massachusetts Chan School of Medicine, Worcester, Massachusetts, USA
| | - David D. Weis
- Department of Chemistry, The University of Kansas, Lawrence, Kansas, USA
| | - Charles B. Shoemaker
- Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, North Grafton, Massachusetts, USA
| | - Nicholas J. Mantis
- Division of Infectious Diseases, New York State Department of Health, Wadsworth Center, Albany, New York, USA
- Department of Biomedical Sciences, University at Albany, Albany, New York, USA
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5
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Hu N, Li W, Zhao Z, Chang Y, Wang C, Zhang Y. Preparation and immunogenicity evaluation of C-HapS-P6 fusion protein vaccine against nontypeable Haemophilus influenzae in mice. Int J Med Microbiol 2024; 314:151616. [PMID: 38461565 DOI: 10.1016/j.ijmm.2024.151616] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 03/01/2024] [Accepted: 03/05/2024] [Indexed: 03/12/2024] Open
Abstract
Nontypeable Haemophilus influenzae (NTHi) is the dominant pathogen in several infectious diseases. Currently the use of antibiotics is the main intervention to prevent NTHi infections, however with the emergence of drug resistant strains, it has compromised the treatment of respiratory infections with antibiotics. Therefore there is an urgent need to develop a safe and effective vaccine to prevent NTHi infections. We investigate the potential of C-HapS-P6 fusion protein as a vaccine for treating NTHi in murine models. PGEX-6P2/C-HapS-P6 fusion gene was constructed using overlap extension polymerase chain reaction. The recombined plasmid was transformed into Escherichia coli for protein expression. The mice were subjected to intraperitoneal immunization using purified antigens. Immunoglobulin (Ig) G in serum samples and IgA in nasal and lung lavage fluids were analyzed using enzyme-linked immunosorbent assay. Cytokine release and proliferation capacity of splenic lymphocytes in response to antigens were measured in vitro. The protective effect of the C-HapS-P6 protein against NTHi infection was evaluated by NTHi count and histological examination. The data showed that the C-HapS-P6 fusion protein increased significantly the levels of serum IgG and nasal and lung IgA, and promoted the release of interleukin (IL)-2, interferon-ϒ, IL-4, IL-5, and IL-17 and the proliferation of splenic lymphocytes compared with C-HapS or P6 protein treatment alone. Moreover, C-HapS-P6 effectively reduced the NTHi colonization in the nasopharynx and lungs of mice. In conclusion, our results demonstrated that the C-HapS-P6 fusion protein vaccine can significantly enhance humoral and cell immune responses and effectively prevent against NTHi infection in the respiratory tract in murine models.
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Affiliation(s)
- Nan Hu
- Institute of Pathogenic Biology and Immunology, North University of Hebei, Zhangjiakou 075000, China
| | - Weifeng Li
- Institute of Pathogenic Biology and Immunology, North University of Hebei, Zhangjiakou 075000, China
| | - Zihong Zhao
- Institute of Pathogenic Biology and Immunology, North University of Hebei, Zhangjiakou 075000, China
| | - Yueli Chang
- Institute of Pathogenic Biology and Immunology, North University of Hebei, Zhangjiakou 075000, China
| | - Cai Wang
- Institute of Pathogenic Biology and Immunology, North University of Hebei, Zhangjiakou 075000, China
| | - Yutuo Zhang
- Institute of Pathogenic Biology and Immunology, North University of Hebei, Zhangjiakou 075000, China.
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Lei EK, Azmat A, Henry KA, Hussack G. Outer membrane vesicles as a platform for the discovery of antibodies to bacterial pathogens. Appl Microbiol Biotechnol 2024; 108:232. [PMID: 38396192 PMCID: PMC10891261 DOI: 10.1007/s00253-024-13033-5] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 01/24/2024] [Accepted: 01/26/2024] [Indexed: 02/25/2024]
Abstract
Bacterial outer membrane vesicles (OMVs) are nanosized spheroidal particles shed by gram-negative bacteria that contain biomolecules derived from the periplasmic space, the bacterial outer membrane, and possibly other compartments. OMVs can be purified from bacterial culture supernatants, and by genetically manipulating the bacterial cells that produce them, they can be engineered to harbor cargoes and/or display molecules of interest on their surfaces including antigens that are immunogenic in mammals. Since OMV bilayer-embedded components presumably maintain their native structures, OMVs may represent highly useful tools for generating antibodies to bacterial outer membrane targets. OMVs have historically been utilized as vaccines or vaccine constituents. Antibodies that target bacterial surfaces are increasingly being explored as antimicrobial agents either in unmodified form or as targeting moieties for bactericidal compounds. Here, we review the properties of OMVs, their use as immunogens, and their ability to elicit antibody responses against bacterial antigens. We highlight antigens from bacterial pathogens that have been successfully targeted using antibodies derived from OMV-based immunization and describe opportunities and limitations for OMVs as a platform for antimicrobial antibody development. KEY POINTS: • Outer membrane vesicles (OMVs) of gram-negative bacteria bear cell-surface molecules • OMV immunization allows rapid antibody (Ab) isolation to bacterial membrane targets • Review and analysis of OMV-based immunogens for antimicrobial Ab development.
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Affiliation(s)
- Eric K Lei
- Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada
| | - Aruba Azmat
- Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada
| | - Kevin A Henry
- Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada
| | - Greg Hussack
- Human Health Therapeutics Research Centre, National Research Council Canada, Ottawa, ON, Canada.
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Wang Y, Wu A, Xu Z, Zhang H, Li H, Fu S, Liu Y, Cui L, Miao Y, Wang Y, Zhumanov K, Xu Y, Sheng J, Yi J, Chen C. A multi-epitope subunit vaccine based on CU/ZN-SOD, OMP31 and BP26 against Brucella melitensis infection in BALB/C mice. Int Immunopharmacol 2024; 127:111351. [PMID: 38113688 DOI: 10.1016/j.intimp.2023.111351] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/02/2023] [Accepted: 12/05/2023] [Indexed: 12/21/2023]
Abstract
Brucellosis, a zoonosis caused by Brucella, is highly detrimental to both humans and animals. Most existing vaccines are live attenuated vaccines with safety flaws for people and animals. Therefore, it is advantageous to design a multi-epitope subunit vaccine (MEV) to prevent Brucella infection. To this end, we applied a reverse vaccinology approach. Six cytotoxic T cell (CTL) epitopes, seven T helper cell (HTL) epitopes, and four linear B cell epitopes from CU/ZN-SOD, Omp31, and BP26 were obtained. We linked the CTL, HTL, B-cell epitopes, the appropriate CTB molecular adjuvant, and the universal T helper lymphocyte epitope, PADRE, with linkers AAY, GPPGG, and KK, respectively. This yielded a 412-amino acid MEV construct, which we named MEVcob. The immunogenicity, stability, safety, and feasibility of the construct were evaluated by bioinformatics tools (including the AlphaFold2 prediction tool, the AlphaFold2 tool, NetMHC-I pan 4.0 server, IEDB MHC-I server, ABCpred service, and C-ImmSim server); the physicochemical properties, secondary and tertiary structures, and binding ability of MEVocb to toll-like receptor 4 (TLR4) was analyzed. Then, codon adaptation and computer cloning studies were performed. MEVocb is highly immunogenic in immunostimulation experiments, The proteins translated by these sequences were relatively stable, exhibiting a high antigenic index. Furthermore, mouse experiments confirmed that the MEVocb construct could raise IFN-γ, IgG, IgG2a, IgG1, IL-2, TNF-α levels in mice, indicating that induced a specific humoral and cellular immune response in BALB/c mice. This vaccine induced a statistically significant level of protection in BALB/c mice when challenged with Brucella melitensis 043 in Xinjiang. Briefly, we utilized immunoinformatic tools to design a novel multi-epitope subunit candidate vaccine against Brucella. This vaccine aims to induce host immune responses and confer specific protective effects. The study results offer a theoretical foundation for the development of a novel Brucella subunit vaccine.
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Affiliation(s)
- Yueli Wang
- School of Animal Science and Technology, Shihezi University, 832000 Shihezi City, Xinjiang, China
| | - Aodi Wu
- School of Animal Science and Technology, Shihezi University, 832000 Shihezi City, Xinjiang, China
| | - Zhenyu Xu
- School of Animal Science and Technology, Shihezi University, 832000 Shihezi City, Xinjiang, China
| | - Huan Zhang
- School of Animal Science and Technology, Shihezi University, 832000 Shihezi City, Xinjiang, China
| | - Honghuan Li
- School of Animal Science and Technology, Shihezi University, 832000 Shihezi City, Xinjiang, China
| | - Shuangshuang Fu
- School of Animal Science and Technology, Shihezi University, 832000 Shihezi City, Xinjiang, China
| | - Yajing Liu
- School of Animal Science and Technology, Shihezi University, 832000 Shihezi City, Xinjiang, China
| | - Lijin Cui
- Fujian Biotechnology Co., LTD., 353000 Nanping, Fujian, China
| | - Yuhe Miao
- Fujian Biotechnology Co., LTD., 353000 Nanping, Fujian, China
| | - Yong Wang
- School of Animal Science and Technology, Shihezi University, 832000 Shihezi City, Xinjiang, China
| | - Kaiat Zhumanov
- Kazakh National Agrarian University, The Republic of Kazakhstan
| | - Yimei Xu
- Xinjiang Center for Disease Control and Prevention, 830000 Urumqi, Xinjiang, China
| | - Jinliang Sheng
- School of Animal Science and Technology, Shihezi University, 832000 Shihezi City, Xinjiang, China.
| | - Jihai Yi
- School of Animal Science and Technology, Shihezi University, 832000 Shihezi City, Xinjiang, China.
| | - Chuangfu Chen
- School of Animal Science and Technology, Shihezi University, 832000 Shihezi City, Xinjiang, China.
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8
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Nie W, Jiang A, Ou X, Zhou J, Li Z, Liang C, Huang LL, Wu G, Xie HY. Metal-polyphenol "prison" attenuated bacterial outer membrane vesicle for chemodynamics promoted in situ tumor vaccines. Biomaterials 2024; 304:122396. [PMID: 38043464 DOI: 10.1016/j.biomaterials.2023.122396] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 11/02/2023] [Accepted: 11/09/2023] [Indexed: 12/05/2023]
Abstract
As natural adjuvants, the bacterial outer membrane vesicles (OMV) hold great potential in cancer vaccines. However, the inherent immunotoxicity of OMV and the rarity of tumor-specific antigens seriously hamper the clinical translation of OMV-based cancer vaccines. Herein, metal-phenolic networks (MPNs) are used to attenuate the toxicity of OMV, meanwhile, provide tumor antigens via the chemodynamic effect induced immunogenic cell death (ICD). Specifically, MPNs are assembled on the OMV surface through the coordination reaction between ferric ions and tannic acid. The iron-based "prison" is locally collapsed in the tumor microenvironment (TME) with both low pH and high ATP features, and thus the systemic toxicity of OMV is significantly attenuated. The released ferric ions in TME promote the ICD of cancer cells through Fenton reaction and then the generation of abundant tumor antigens, which can be used to fabricate in-situ vaccines by converging with OMV. Together with the immunomodulatory effect of OMV, potent tumor repression on a bilateral tumor model is achieved with good biosafety.
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Affiliation(s)
- Weidong Nie
- School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Anqi Jiang
- School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Xu Ou
- School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Jiaxin Zhou
- School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Zijin Li
- School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Chao Liang
- School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Li-Li Huang
- School of Medical Technology, Beijing Institute of Technology, Beijing 100081, PR China
| | - Guanghao Wu
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China
| | - Hai-Yan Xie
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Chemical Biology Center, Peking University, Beijing, 100191, PR China.
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9
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Zheng K, Feng Y, Li L, Kong F, Gao J, Kong X. Engineered bacterial outer membrane vesicles: a versatile bacteria-based weapon against gastrointestinal tumors. Theranostics 2024; 14:761-787. [PMID: 38169585 PMCID: PMC10758051 DOI: 10.7150/thno.85917] [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] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 10/01/2023] [Indexed: 01/05/2024] Open
Abstract
Outer membrane vesicles (OMVs) are nanoscale lipid bilayer structures released by gram-negative bacteria. They share membrane composition and properties with their originating cells, making them adept at traversing cellular barriers. These OMVs have demonstrated exceptional membrane stability, immunogenicity, safety, penetration, and tumor-targeting properties, which have been leveraged in developing vaccines and drug delivery systems. Recent research efforts have focused on engineering OMVs to increase production yield, reduce cytotoxicity, and improve the safety and efficacy of treatment. Notably, gastrointestinal (GI) tumors have proven resistant to several traditional oncological treatment strategies, including chemotherapy, radiotherapy, and targeted therapy. Although immune checkpoint inhibitors have demonstrated efficacy in some patients, their usage as monotherapy remains limited by tumor heterogeneity and individual variability. The immunogenic and modifiable nature of OMVs makes them an ideal design platform for the individualized treatment of GI tumors. OMV-based therapy enables combination therapy and optimization of anti-tumor effects. This review comprehensively summarizes recent advances in OMV engineering for GI tumor therapy and discusses the challenges in the clinical translation of emerging OMV-based anti-tumor therapies.
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Affiliation(s)
- Keshuang Zheng
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China
- Institute of Neuroscience, Key Laboratory of Molecular Neurobiology of the Ministry of Education and the Collaborative Innovation Center for Brain Science, Naval Medical University, Shanghai, 200433, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Yongpu Feng
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China
- Institute of Neuroscience, Key Laboratory of Molecular Neurobiology of the Ministry of Education and the Collaborative Innovation Center for Brain Science, Naval Medical University, Shanghai, 200433, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Lei Li
- Digestive Endoscopy Center, Shanghai Tenth People's Hospital, Shanghai, China
| | - Fanyang Kong
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China
- Institute of Neuroscience, Key Laboratory of Molecular Neurobiology of the Ministry of Education and the Collaborative Innovation Center for Brain Science, Naval Medical University, Shanghai, 200433, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Jie Gao
- Changhai Clinical Research Unit, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Xiangyu Kong
- National Key Laboratory of Immunology and Inflammation, Naval Medical University, Shanghai, 200433, China
- Institute of Neuroscience, Key Laboratory of Molecular Neurobiology of the Ministry of Education and the Collaborative Innovation Center for Brain Science, Naval Medical University, Shanghai, 200433, China
- Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China
- Changhai Clinical Research Unit, Changhai Hospital, Naval Medical University, Shanghai, China
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10
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Sadeghi L, Mohit E, Moallemi S, Ahmadi FM, Bolhassani A. Recent advances in various bio-applications of bacteria-derived outer membrane vesicles. Microb Pathog 2023; 185:106440. [PMID: 37931826 DOI: 10.1016/j.micpath.2023.106440] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 10/12/2023] [Accepted: 11/02/2023] [Indexed: 11/08/2023]
Abstract
Outer membrane vesicles (OMVs) are spherical nanoparticles released from gram-negative bacteria. OMVs were originally classified into native 'nOMVs' (produced naturally from budding of bacteria) and non-native (produced by mechanical means). nOMVs and detergent (dOMVs) are isolated from cell supernatant without any detergent cell disruption techniques and through detergent extraction, respectively. Growth stages and conditions e.g. different stress factors, including temperature, nutrition deficiency, and exposure to hazardous chemical agents can affect the yield of OMVs production and OMVs content. Because of the presence of bacterial antigens, pathogen-associated molecular patterns (PAMPs), various proteins and the vesicle structure, OMVs have been developed in many biomedical applications. OMVs due to their size can be phagocytized by APCs, enter lymph vessels, transport antigens efficiently, and induce both T and B cells immune responses. Non-engineered OMVs have been frequently used as vaccines against different bacterial and viral infections, and various cancers. OMVs can also be used in combination with different antigens as an attractive vaccine adjuvant. Indeed, foreign antigens from target microorganisms can be trapped in the lumen of nonpathogenic vesicles or can be displayed on the surface through bacterial membrane protein to increase the immunogenicity of the antigens. In this review, different factors affecting OMV production including time of cultivation, growth media, stress conditions and genetic manipulations to enhance vesiculation will be described. Furthermore, recent advances in various biological applications of OMVs such as vaccine, drug delivery, cancer therapy, and enzyme carrier are discussed. Generally, the application of OMVs as vaccine carrier in three categories (i.e., non-engineered OMVs, OMVs as an adjuvant, recombinant OMVs (rOMVs)), as delivery system for small interfering RNA and therapeutic agents, and as enzymes carrier will be discussed.
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Affiliation(s)
- Leila Sadeghi
- Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, Iran
| | - Elham Mohit
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Protein Technology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Samaneh Moallemi
- School of Biomedical Sciences, Faculty of Medicine, UNSW Sydney, NSW, 2052, Australia
| | | | - Azam Bolhassani
- Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, Iran.
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11
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Mitsuwan W, Intongead S, Saengsawang P, Romyasamit C, Narinthorn R, Nissapatorn V, Pereira MDL, Paul AK, Wongtawan T, Boripun R. Occurrence of multidrug resistance associated with extended-spectrum β‑lactamase and the biofilm forming ability of Escherichia coli in environmental swine husbandry. Comp Immunol Microbiol Infect Dis 2023; 103:102093. [PMID: 37976973 DOI: 10.1016/j.cimid.2023.102093] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 10/30/2023] [Accepted: 11/09/2023] [Indexed: 11/19/2023]
Abstract
Extended-spectrum beta-lactamase (ESBL) production and biofilm formation are mechanisms employed by Escherichia coli to resist beta-lactam antibiotics. Thus, we aimed to examine antibiotic resistance associated with ESBL production and biofilm formation in E. coli isolates from swine farms in Southern Thailand. In total, 159 E. coli isolates were obtained, with 44 isolates identified as ESBL producers, originating from feces (18.87 %) and wastewater (8.80 %) samples. All ESBL-producing strains exhibited resistance to ampicillin (100 %), followed by the cephalosporin group (97.73 %) and tetracycline (84.09 %). Multidrug resistance was observed in 17 isolates (38.63 %). Among the isolates from feces samples, the blaGES gene was the most prevalent, detected in 90 % of the samples, followed by blaCTX-M9 (86.67 %) and blaCTX-M1 (66.67 %), respectively. In the bacteria isolated from wastewater, both blaGES and blaCTX-M9 genes were the predominant resistance genes, detected in 100 % of the isolates, followed by blaCTX-M1 (64.29 %) and blaTEM (50 %), respectively. Strong biofilm formation was observed in 11 isolates (36.67 %) from feces and 4 isolates (25.57 %) from wastewater samples. Notably, nearly 100 % of ESBL-producing strains isolated from feces tested positive for both pgaA and pgaC genes, which play a role in intracellular adhesion and biofilm production. These findings contribute to the understanding and potential control of ESBL-producing E. coli, and the dissemination of antibiotic resistance and biofilm-related genes in swine farms.
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Affiliation(s)
- Watcharapong Mitsuwan
- Akkhraratchakumari Veterinary College, Walailak University, Nakhon Si Thammarat 80160, Thailand; One Health Research Center, Walailak University, Nakhon Si Thammarat 80160, Thailand; Center of Excellence in Innovation of Essential Oil and Bio-active compound, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Sutsiree Intongead
- Akkhraratchakumari Veterinary College, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Phirabhat Saengsawang
- Akkhraratchakumari Veterinary College, Walailak University, Nakhon Si Thammarat 80160, Thailand; One Health Research Center, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Chonticha Romyasamit
- School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat, Thailand
| | - Ruethai Narinthorn
- Akkhraratchakumari Veterinary College, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Veeranoot Nissapatorn
- School of Allied Health Sciences, Southeast Asia Water Team (SEA Water Team), World Union for Herbal Drug Discovery (WUHeDD), and Research Excellence Center for Innovation and Health Products (RECIHP), Walailak University, Nakhon Si Thammarat, Thailand
| | - Maria de Lourdes Pereira
- CICECO-Aveiro Institute of Materials and Department of Medical Sciences, University of Aveiro, Aveiro, Portugal
| | - Alok K Paul
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart TAS 7001, Australia
| | - Tuempong Wongtawan
- Akkhraratchakumari Veterinary College, Walailak University, Nakhon Si Thammarat 80160, Thailand; One Health Research Center, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Ratchadaporn Boripun
- Akkhraratchakumari Veterinary College, Walailak University, Nakhon Si Thammarat 80160, Thailand; One Health Research Center, Walailak University, Nakhon Si Thammarat 80160, Thailand.
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12
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Shi R, Lv R, Dong Z, Cao Q, Wu R, Liu S, Ren Y, Liu Z, van der Mei HC, Liu J, Busscher HJ. Magnetically-targetable outer-membrane vesicles for sonodynamic eradication of antibiotic-tolerant bacteria in bacterial meningitis. Biomaterials 2023; 302:122320. [PMID: 37738742 DOI: 10.1016/j.biomaterials.2023.122320] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/06/2023] [Accepted: 09/09/2023] [Indexed: 09/24/2023]
Abstract
Treatment of acute bacterial meningitis is difficult due to the impermeability of the blood-brain barrier, greatly limiting the antibiotic concentrations that can be achieved in the brain. Escherichia coli grown in presence of iron-oxide magnetic nanoparticles secrete large amounts of magnetic outer-membrane vesicles (OMVs) in order to remove excess Fe from their cytoplasm. OMVs are fully biomimetic nanocarriers, but can be inflammatory. Here, non-inflammatory magnetic OMVs were prepared from an E. coli strain in which the synthesis of inflammatory lipid A acyltransferase was inhibited using CRISPR/Cas9 mediated gene knockout. OMVs were loaded with ceftriaxone (CRO) and meso-tetra-(4-carboxyphenyl)porphine (TCPP) and magnetically driven across the blood-brain barrier for sonodynamic treatment of bacterial meningitis. ROS-generation upon ultrasound application of CRO- and TCPP-loaded OMVs yielded similar ROS-generation as by TCPP in solution. In vitro, ROS-generation by CRO- and TCPP-loaded OMVs upon ultrasound application operated synergistically with CRO to kill a hard-to-kill, CRO-tolerant E. coli strain. In a mouse model of CRO-tolerant E. coli meningitis, CRO- and TCPP-loaded OMVs improved survival rates and clinical behavioral scores of infected mice after magnetic targeting and ultrasound application. Recurrence did not occur for at least two weeks after arresting treatment.
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Affiliation(s)
- Rui Shi
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Rd, Suzhou, 215123, Jiangsu, PR China; University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, Antonius Deusinglaan 1, 9713 AV, Groningen, the Netherlands
| | - Rui Lv
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Rd, Suzhou, 215123, Jiangsu, PR China
| | - Ziliang Dong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Rd, Suzhou, 215123, Jiangsu, PR China; Science and Technology Innovation Center, Shandong First Medical University, Jinan, 250000, Shandong, PR China
| | - Qinghua Cao
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Rd, Suzhou, 215123, Jiangsu, PR China
| | - Renfei Wu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Rd, Suzhou, 215123, Jiangsu, PR China; University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, Antonius Deusinglaan 1, 9713 AV, Groningen, the Netherlands
| | - Sidi Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Rd, Suzhou, 215123, Jiangsu, PR China; University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, Antonius Deusinglaan 1, 9713 AV, Groningen, the Netherlands
| | - Yijin Ren
- University of Groningen and University Medical Center of Groningen, Department of Orthodontics, Hanzeplein 1, 9700 RB, Groningen, the Netherlands
| | - Zhuang Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Rd, Suzhou, 215123, Jiangsu, PR China
| | - Henny C van der Mei
- University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, Antonius Deusinglaan 1, 9713 AV, Groningen, the Netherlands.
| | - Jian Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Rd, Suzhou, 215123, Jiangsu, PR China.
| | - Henk J Busscher
- University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, Antonius Deusinglaan 1, 9713 AV, Groningen, the Netherlands
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Degn LLT, Bech D, Christiansen G, Birkelund S. Lack of neutralization of Chlamydia trachomatis infection by high avidity monoclonal antibodies to surface-exposed major outer membrane protein variable domain IV. Mol Immunol 2023; 163:163-173. [PMID: 37801817 DOI: 10.1016/j.molimm.2023.09.015] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 07/21/2023] [Accepted: 09/17/2023] [Indexed: 10/08/2023]
Abstract
Chlamydia trachomatis is the leading cause of sexually transmitted diseases causing frequent, long-lasting, and often asymptomatic recurrent infections resulting in severe reproductive complications. C. trachomatis is an intracellular Gram-negative bacterium with a biphasic developmental cycle in which extracellular, infectious elementary bodies (EB) alternate with the intracellular replicating reticulate bodies (RB). The outer membrane of EB consists of a tight disulfide cross-linking protein network. The most essential protein is the 42 kDa major outer membrane protein (MOMP) that contributes to the rigid structural integrity of the outer membrane. MOMP is a transmembrane protein with a β-barrel structure consisting of four variable domains (VD) separated by five constant domains. VDIV possesses surface-exposed species-specific epitopes recognized by the immune system and, therefore, functions as a candidate for vaccine development. To analyze the protective contribution of antibodies for a MOMP vaccine, we investigated the specificity and binding characteristics of two monoclonal antibodies (MAb)224.2 and MAb244.4 directed against C. trachomatis serovar D MOMP. By immunoelectron microscopy, we found that both MAb bind to the surface of C. trachomatis EB. By epitope mapping, we characterized the MOMP epitope as linear consisting of 6 amino acids: 322TIAGAGD328. By ELISA it was shown that both antibodies bind with a higher avidity to the chlamydial surface compared to binding to monomeric MOMP, indicating that the antibodies bind divalently to the surface of C. trachomatis EB. Despite strong binding to the chlamydial surface, the antibodies only partially reduced the infectivity. This may be explained by the observation that even though both MAb covered the EB surface, antibodies could not be regularly detected on EB after the uptake into the host cell.
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Affiliation(s)
- Laura Lind Throne Degn
- Department of Health Science and Technology, Medical Microbiology and Immunology, Aalborg University, Fredrik Bajers Vej 3b, 9220 Aalborg Ø, Denmark; Department of Clinical Medicine, Department of Clinical Immunology, Aalborg University Hospital, Urbansgade 32, 9000 Aalborg, Denmark
| | - Ditte Bech
- Department of Health Science and Technology, Medical Microbiology and Immunology, Aalborg University, Fredrik Bajers Vej 3b, 9220 Aalborg Ø, Denmark
| | - Gunna Christiansen
- Department of Health Science and Technology, Medical Microbiology and Immunology, Aalborg University, Fredrik Bajers Vej 3b, 9220 Aalborg Ø, Denmark
| | - Svend Birkelund
- Department of Health Science and Technology, Medical Microbiology and Immunology, Aalborg University, Fredrik Bajers Vej 3b, 9220 Aalborg Ø, Denmark.
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14
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Mechai S, Coatsworth H, Ogden NH. Possible effect of mutations on serological detection of Borrelia burgdorferi sensu stricto ospC major groups: An in-silico study. PLoS One 2023; 18:e0292741. [PMID: 37815990 PMCID: PMC10564231 DOI: 10.1371/journal.pone.0292741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 09/27/2023] [Indexed: 10/12/2023] Open
Abstract
The outer surface protein C (OspC) of the agent of Lyme disease, Borrelia burgdorferi sensu stricto, is a major lipoprotein surface-expressed during early-phase human infections. Antibodies to OspC are used in serological diagnoses. This study explored the hypothesis that serological test sensitivity decreases as genetic similarity of ospC major groups (MGs) of infecting strains, and ospC A (the MG in the strain B31 used to prepare antigen for serodiagnosis assays) decreases. We used a previously published microarray dataset to compare serological reactivity to ospC A (measured as pixel intensity) versus reactivity to 22 other ospC MGs, within a population of 55 patients diagnosed by two-tier serological testing using B. burgdorferi s.s. strain B31 as antigen, in which the ospC MG is OspC A. The difference in reactivity of sera to ospC A and reactivity to each of the other 22 ospC MGs (termed 'reactivity difference') was the outcome variable in regression analysis in which genetic distance of the ospC MGs from ospC A was the explanatory variable. Genetic distance was computed for the whole ospC sequence, and 9 subsections, from Neighbour Joining phylogenetic trees of the 23 ospC MGs. Regression analysis was conducted using genetic distance for the full ospC sequence, and the subsections individually. There was a significant association between the reactivity difference and genetic distance of ospC MGs from ospC A: increased genetic distance reduced reactivity to OspC A. No single ospC subsection sequence fully explained the relationship between genetic distance and reactivity difference. An analysis of single nucleotide polymorphisms supported a biological explanation via specific amino acid modifications likely to change protein binding affinity. This adds support to the hypothesis that genetic diversity of B. burgdorferi s.s. (here specifically OspC) may impact serological diagnostic test performance. Further prospective studies are necessary to explore the clinical implications of these findings.
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Affiliation(s)
- Samir Mechai
- Public Health Risk Sciences, National Microbiology Laboratory Branch, Public Health Agency of Canada, St Hyacinthe, QC, Canada
- Groupe de Recherche en Épidémiologie des Zoonoses et Santé Publique (GREZOSP), Faculté de Médecine Vétérinaire, St Hyacinthe, QC, Canada
| | - Heather Coatsworth
- One Health Division, National Microbiology Laboratory Branch, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Nicholas H. Ogden
- Public Health Risk Sciences, National Microbiology Laboratory Branch, Public Health Agency of Canada, St Hyacinthe, QC, Canada
- Groupe de Recherche en Épidémiologie des Zoonoses et Santé Publique (GREZOSP), Faculté de Médecine Vétérinaire, St Hyacinthe, QC, Canada
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Hajdusek O, Perner J. VLA15, a new global Lyme disease vaccine undergoes clinical trials. Lancet Infect Dis 2023; 23:1105-1106. [PMID: 37419127 DOI: 10.1016/s1473-3099(23)00312-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 05/09/2023] [Indexed: 07/09/2023]
Affiliation(s)
- Ondrej Hajdusek
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Ceske Budejovice 37005, Czech Republic.
| | - Jan Perner
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Ceske Budejovice 37005, Czech Republic
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16
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Taylor C, Belin E, Brodbelt D, Klaasen HLBM, Catchpole B. Exploration of the potential utility of the luciferase immunoprecipitation system (LIPS) assay for the detection of anti-leptospira antibodies in dogs. Vet Immunol Immunopathol 2023; 264:110661. [PMID: 37827091 DOI: 10.1016/j.vetimm.2023.110661] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 10/04/2023] [Indexed: 10/14/2023]
Abstract
Canine leptospirosis represents a diagnostic challenge to veterinarians, due to the variability in presenting clinical signs and interpretation of serology test results in dogs that have been vaccinated previously. None of the commercially available serological assays, including the microscopic agglutination test (MAT), have been verified to be capable of differentiating infected from vaccinated animals (DIVA). Recent work identified that half of primary practice attending dogs were up to date with their leptospirosis vaccination and would be expected to have circulating anti-leptospira antibodies (Taylor et al., 2022), indicating that this is a relevant issue for suspected leptospirosis cases in dogs in the UK. This study aimed to explore the utility of three leptospiral outer membrane proteins (OMPs: LipL32, LipL21 and LipL41) as potential DIVA targets in the luciferase immunoprecipitation system (LIPS) assay. N and C terminal nanoluciferase tagged recombinant proteins were generated for each OMP. Differences in reactivity between serum samples from MAT positive dogs (n = 29) and paired samples (n = 6 dogs) taken pre and 21 days post leptospirosis vaccination were assessed against these six constructs. Reactivity was greater towards the N terminal than the C terminal recombinant proteins for all three OMPs. None of the constructs appeared to demonstrate DIVA capability, although two (pNLF1-N-FLAG/LipL32 and pNLF1-N-FLAG/LipL21) were able to detect vaccine seroconversion. The findings of this work suggest that these particular OMP targets do not offer DIVA ability, however LipL32 and LipL21 may be suitable for use in immunoassays for vaccine trials or for detection of infections in humans, where there is no requirement for DIVA capability.
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Affiliation(s)
- C Taylor
- Royal Veterinary College, Hawkshead Lane, Hatfield, Hertfordshire, United Kingdom.
| | - E Belin
- Royal Veterinary College, Hawkshead Lane, Hatfield, Hertfordshire, United Kingdom
| | - D Brodbelt
- Royal Veterinary College, Hawkshead Lane, Hatfield, Hertfordshire, United Kingdom
| | - H L B M Klaasen
- Global Companion Animals Research and Development, Merck Sharp and Dohme Animal Health, Boxmeer, the Netherlands
| | - B Catchpole
- Royal Veterinary College, Hawkshead Lane, Hatfield, Hertfordshire, United Kingdom
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Mansouri M, Sadeghpoor M, Abdollahi M, Vafaei AJ, Jalali Nadoushan M, Rasooli I. Synergistic immunoprotection by Oma87 and Bap against Acinetobacter baumannii sepsis model. Int Immunopharmacol 2023; 122:110650. [PMID: 37454632 DOI: 10.1016/j.intimp.2023.110650] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 07/03/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
Acinetobacter baumannii is the leading cause of nosocomial infection. A surface protein commonly known as biofilm associate protein (Bap) has been identified in a bloodstream isolate of A. baumannii. Bap of A. baumannii is involved in intercellular adhesion within the mature biofilm. Outer membrane protein Acinetobacter 87 kDa (Oma87) or β-barrel assembly machinery A (BamA) has been introduced as an immunogenic outer membrane protein via in silico reverse vaccinology. Current research examines the synergistic effect of immunization of mice with both recombinant proteins viz., Oma87 and Bap. Antibodies were raised to the proteins. The mice were challenged with A. baumannii ATCC 19606 and the bacterial burden was enumerated in the mice's livers, spleens, and lungs followed by histological examination. IgG levels significantly increased, and a significant (p < 0.0001) difference was observed between bacterial burdens in the internal organs of the actively and passively immunized groups. Female BALB/c mice weighing 20-25 g, were divided into 4 groups of 14 mice each viz., control, Oma87, Bap, Oma87-Bap groups. The proteins were individually immunogenic, but the combination of both proteins had a synergistic protection property. This is further supported by the histological examination. Based on the results, the combination of Oma87 and Bap may be considered a promising vaccine candidate against A. baumannii .
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Affiliation(s)
- Mobina Mansouri
- Department of Biology, Faculty of Basic Sciences, Shahed University, Tehran, Iran
| | - Masoomeh Sadeghpoor
- Department of Biology, Faculty of Basic Sciences, Shahed University, Tehran, Iran
| | - Marziyeh Abdollahi
- Department of Biology, Faculty of Basic Sciences, Shahed University, Tehran, Iran
| | - Amir Javad Vafaei
- Department of Biology, Faculty of Basic Sciences, Shahed University, Tehran, Iran
| | | | - Iraj Rasooli
- Department of Biology, Faculty of Basic Sciences, Shahed University, Tehran, Iran; Molecular Microbiology Research Center and Department of Biology, Shahed University, Tehran, Iran.
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Mirali M, Jahangiri A, Jalali Nadoushan M, Rasooli I. A two-protein cocktail elicits a protective immune response against Acinetobacter baumannii in a murine infection model. Microb Pathog 2023; 182:106262. [PMID: 37474079 DOI: 10.1016/j.micpath.2023.106262] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 07/05/2023] [Accepted: 07/17/2023] [Indexed: 07/22/2023]
Abstract
PURPOSE Due to its high drug resistance, Acinetobacter baumannii is a priority for new therapeutic measures like vaccines. In this study, the protectivity of a combination cocktail of Omp34 and BauA as a vaccine against A. baumannii was studied in a murine sepsis model. METHODS The antibody titers were raised to Omp34 and BauA in BALB/c mice and assessed by indirect ELISA. The immunized mice were challenged with A. baumannii ATCC 19606. The bacterial loads in the liver, spleen, and lungs were also determined. RESULTS A significant increase in survival of the immunized mice was noted. In active immunity, the survival rates in mice receiving Omp34 and BauA alone or in combination were 100%. A significant decrease in the bacterial load was observed in the spleens, livers, and lungs of vaccinated mice. Anti-BauA and anti-Omp34 sera crossly detected Omp34 and BauA respectively. The decrease in bacterial load in body organs of mice vaccinated with a combination of the two proteins was significantly higher than those of the single proteins in both actively and passively immunized mice. In passive immunity, the survival rate of mice receiving specific sera raised to the combination of these proteins was 85.7%. CONCLUSION Higher protection by a combination of Omp34 and BauA than Omp34 or BauA could be attributed to targeting simultaneously both surface antigens indicating the synergistic effect of Omp34 and BauA as suitable vaccine candidates in the prevention or treatment of A. baumannii infections.
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Affiliation(s)
| | - Abolfazl Jahangiri
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mohammadreza Jalali Nadoushan
- Department of Pathology, School of Medicine, Shahed University, Tehran, Iran; Molecular Microbiology Research Center and Department of Biology, Shahed University, Tehran, Iran.
| | - Iraj Rasooli
- Department of Biology, Shahed University, Tehran, Iran; Molecular Microbiology Research Center and Department of Biology, Shahed University, Tehran, Iran.
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19
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ARIBAM SD, NAKAYAMA M, OGAWA Y, SHIMOJI Y, EGUCHI M. Outer membrane protein BamA-based ELISA differentiates Salmonella-vaccinated chickens from naturally infected chickens. J Vet Med Sci 2023; 85:809-812. [PMID: 37316287 PMCID: PMC10466062 DOI: 10.1292/jvms.23-0133] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 06/06/2023] [Indexed: 06/16/2023] Open
Abstract
Salmonella often causes subclinical infection in chickens, but antibody tests can find infected individuals and control the spread of infection. In this study, the S. Typhimurium-specific outer membrane, β-barrel assembly machinery protein A (BamA), was overexpressed in Escherichia coli and purified as a coating antigen to develop a BamA-based enzyme-linked immuno sorbent assay for detecting Salmonella infection. The presence of anti-BamA IgG was detected in the sera of infected BALB/c mice, but not in that of heat-killed Salmonella-vaccinated mice. The assay was validated using White Leghorn chickens and showed similar results. The detection of BamA antibodies in the sera can differentiate infected chickens from vaccinated chickens. This assay will be useful for monitoring Salmonella infection in chickens and possibly in other animals.
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Affiliation(s)
- Swarmistha Devi ARIBAM
- Division of Infectious Animal Disease Research, National Institute of Animal Health, NARO, Ibaraki, Japan
| | - Momoko NAKAYAMA
- Division of Infectious Animal Disease Research, National Institute of Animal Health, NARO, Ibaraki, Japan
| | - Yohsuke OGAWA
- Division of Infectious Animal Disease Research, National Institute of Animal Health, NARO, Ibaraki, Japan
| | - Yoshihiro SHIMOJI
- Division of Infectious Animal Disease Research, National Institute of Animal Health, NARO, Ibaraki, Japan
| | - Masahiro EGUCHI
- Division of Infectious Animal Disease Research, National Institute of Animal Health, NARO, Ibaraki, Japan
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Nock AM, Aistleitner K, Clark TR, Sturdevant D, Ricklefs S, Virtaneva K, Zhang Y, Gulzar N, Redekar N, Roy A, Hackstadt T. Identification of an autotransporter peptidase of Rickettsia rickettsii responsible for maturation of surface exposed autotransporters. PLoS Pathog 2023; 19:e1011527. [PMID: 37523399 PMCID: PMC10414592 DOI: 10.1371/journal.ppat.1011527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 08/10/2023] [Accepted: 07/02/2023] [Indexed: 08/02/2023] Open
Abstract
Members of the spotted fever group rickettsia express four large, surface-exposed autotransporters, at least one of which is a known virulence determinant. Autotransporter translocation to the bacterial outer surface, also known as type V secretion, involves formation of a β-barrel autotransporter domain in the periplasm that inserts into the outer membrane to form a pore through which the N-terminal passenger domain is passed and exposed on the outer surface. Two major surface antigens of Rickettsia rickettsii, are known to be surface exposed and the passenger domain cleaved from the autotransporter domain. A highly passaged strain of R. rickettsii, Iowa, fails to cleave these autotransporters and is avirulent. We have identified a putative peptidase, truncated in the Iowa strain, that when reconstituted into Iowa restores appropriate processing of the autotransporters as well as restoring a modest degree of virulence.
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Affiliation(s)
- Adam M. Nock
- Host-Parasite Interactions Section, Laboratory of Bacteriology, Rocky Mountain Laboratories, NIAID, NIH; Hamilton, Montana, United States of America
| | - Karin Aistleitner
- Host-Parasite Interactions Section, Laboratory of Bacteriology, Rocky Mountain Laboratories, NIAID, NIH; Hamilton, Montana, United States of America
| | - Tina R. Clark
- Host-Parasite Interactions Section, Laboratory of Bacteriology, Rocky Mountain Laboratories, NIAID, NIH; Hamilton, Montana, United States of America
| | - Dan Sturdevant
- Genomics Research Section, Research Technologies Branch, Rocky Mountain Laboratories, NIAID, NIH; Hamilton, Montana, United States of America
| | - Stacy Ricklefs
- Genomics Research Section, Research Technologies Branch, Rocky Mountain Laboratories, NIAID, NIH; Hamilton, Montana, United States of America
| | - Kimmo Virtaneva
- Genomics Research Section, Research Technologies Branch, Rocky Mountain Laboratories, NIAID, NIH; Hamilton, Montana, United States of America
| | - Yixiang Zhang
- Protein Chemistry Unit, Research Technologies Branch, Rocky Mountain Laboratories, NIAID, NIH; Hamilton, Montana, United States of America
| | - Naila Gulzar
- Integrated Data Sciences Section, Research Technologies Branch, NIAID, NIH, Bethesda, Maryland, United States of America
| | - Neelam Redekar
- Integrated Data Sciences Section, Research Technologies Branch, NIAID, NIH, Bethesda, Maryland, United States of America
| | - Amitiva Roy
- Bioinformatics and Computational Biology Branch, Office of Cyber Infrastructure and Computational Biology, Rocky Mountain Laboratories, NIAID, NIH; Hamilton, Montana, United States of America
| | - Ted Hackstadt
- Host-Parasite Interactions Section, Laboratory of Bacteriology, Rocky Mountain Laboratories, NIAID, NIH; Hamilton, Montana, United States of America
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21
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Higham SL, Baker S, Flight KE, Krishna A, Kellam P, Reece ST, Tregoning JS. Intranasal immunization with outer membrane vesicles (OMV) protects against airway colonization and systemic infection with Acinetobacter baumannii. J Infect 2023; 86:563-573. [PMID: 36858180 DOI: 10.1016/j.jinf.2023.02.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 02/08/2023] [Accepted: 02/23/2023] [Indexed: 03/02/2023]
Abstract
OBJECTIVES The multidrug-resistant bacteria Acinetobacter baumannii is a major cause of hospital-associated infection; a vaccine could significantly reduce this burden. The aim was to develop a clinically relevant model of A. baumannii respiratory tract infection and to test the impact of different immunization routes on protective immunity provided by an outer membrane vesicle (OMV) vaccine. METHODS BALB/c mice were intranasally challenged with isolates of oxa23-positive global clone GC2 A. baumannii from the lungs of patients with ventilator-associated pneumonia. Mice were immunized with OMVs by the intramuscular, subcutaneous or intranasal routes; protection was determined by measuring local and systemic bacterial load. RESULTS Infection with A. baumannii clinical isolates led to a more disseminated infection than the prototype A. baumannii strain ATCC17978; with bacteria detectable in upper and lower airways and the spleen. Intramuscular immunization induced an antibody response but did not protect against bacterial infection. However, intranasal immunization significantly reduced airway colonization and prevented systemic bacterial dissemination. CONCLUSIONS Use of clinically relevant isolates of A. baumannii provides stringent model for vaccine development. Intranasal immunization with OMVs was an effective route for providing protection, demonstrating that local immunity is important in preventing A. baumannii infection.
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Affiliation(s)
- Sophie L Higham
- Department of Infectious Disease, Imperial College London, St Marys Campus, Norfolk Place, London W2 1PG, United Kingdom
| | - Stephen Baker
- Cambridge Institute of Therapeutic Immunology & Infectious Disease, Jeffrey Cheah Biomedical Centre, Cambridge Biomedical Campus, University of Cambridge, Puddicombe Way, Cambridge CB2 0AW, United Kingdom
| | - Katie E Flight
- Department of Infectious Disease, Imperial College London, St Marys Campus, Norfolk Place, London W2 1PG, United Kingdom
| | - Aishwarya Krishna
- Infectious Diseases and Vaccines, Kymab, Babraham Research Campus, Cambridge CB22 3AT, United Kingdom
| | - Paul Kellam
- Department of Infectious Disease, Imperial College London, St Marys Campus, Norfolk Place, London W2 1PG, United Kingdom; Infectious Diseases and Vaccines, Kymab, Babraham Research Campus, Cambridge CB22 3AT, United Kingdom; RQ Biotechnology Ltd, 7-12 Tavistock Square, London WC1H 9LT, United Kingdom
| | - Stephen T Reece
- Infectious Diseases and Vaccines, Kymab, Babraham Research Campus, Cambridge CB22 3AT, United Kingdom.
| | - John S Tregoning
- Department of Infectious Disease, Imperial College London, St Marys Campus, Norfolk Place, London W2 1PG, United Kingdom.
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22
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Shi D, Chen Y, Chen M, Zhou T, Xu F, Zhang C, Wang C, Li Z. Bioinformatics analysis of Omp19 and Omp25 proteins for designing multi-epitope vaccines against Brucella. Medicine (Baltimore) 2023; 102:e33182. [PMID: 36930131 PMCID: PMC10019172 DOI: 10.1097/md.0000000000033182] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 02/14/2023] [Indexed: 03/18/2023] Open
Abstract
Brucellosis is a zoonotic disease caused by Brucella. There is no effective vaccine against human brucellosis. Omp19 and Omp25 are the outer membrane proteins of Brucella. They are widely expressed and highly conserved in Brucella and have high immunogenicity. Herein, we aim to identify multi-epitope vaccine candidates based on Omp19 and Omp25. We analyzed the physicochemical properties and protein structure of Omp19 and Omp25, and predicted the corresponding B cell and T cell epitopes using bioinformatics analysis. Omp19 and Omp25 were composed of 177 amino acids and 213 amino acids, respectively. They were both stable hydrophilic proteins. The instability indices were 44.8 and 23, respectively. The hydrophilicity was -0.1 and -0.317, respectively. In the secondary structure of Omp19 and Omp25 proteins, the α-helix accounted for 12.43% and 23.94%, the β-sheet was 18.64% and 23.47%, the β-turn was 6.78% and 4.23%, and the random coil was 62.15% and 48.36%. Finally, 5 B cell epitopes, 3 Th-cell epitopes and 5 CTL cell epitopes of Omp19 protein, and 4 B cell epitopes, 3 Th-cell epitopes, and 5 CTL cell epitopes of Omp25 protein were selected as vaccine candidates. In conclusion, we obtained potential B cell and T cell epitopes of the Brucella outer membrane Omp19 and Omp25 proteins. This lays the foundation for the further design of multi-epitope vaccine of Brucella.
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Affiliation(s)
- Donghao Shi
- Clinical Laboratory Center, Traditional Chinese Medicine Hospital Affiliated to Xinjiang Medical University, Urumqi, P.R. China
| | - Yuan Chen
- Clinical Laboratory Center, People`s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, P.R. China
| | - Muzhi Chen
- Department of Rheumatology, Traditional Chinese Medicine Hospital Affiliated to Xinjiang Medical University, Urumqi, P.R. China
| | - Tingting Zhou
- Department of Public Health, People`s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, P.R. China
| | - Feili Xu
- Clinical Laboratory Center, Traditional Chinese Medicine Hospital Affiliated to Xinjiang Medical University, Urumqi, P.R. China
| | - Chao Zhang
- Urumqi OE Biotech Co., Ltd., Urumqi, Xinjiang, P.R. China
| | - Changmin Wang
- Clinical Laboratory Center, People`s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, P.R. China
| | - Zhiwei Li
- Clinical Laboratory Center, People`s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, P.R. China
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23
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Roy S, Agarwal T, Das A, Halder T, Upadhyaya G, Chaubey B, Ray S. The C-terminal stretch of glycine-rich proline-rich protein (SbGPRP1) from Sorghum bicolor serves as an antimicrobial peptide by targeting the bacterial outer membrane protein. Plant Mol Biol 2023; 111:131-151. [PMID: 36271987 DOI: 10.1007/s11103-022-01317-1] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
The C-terminal stretch in SbGPRP1 (Sorghum glycine-rich proline-rich protein) acts as an antimicrobial peptide in the host innate defense mechanism. Cationic antimicrobial proteins or peptides can either bind to the bacterial membrane or target a specific protein on the bacterial membrane thus leading to membrane perturbation. The 197 amino acid polypeptide of SbGPRP1 showed disordered structure at the N-terminal end and ordered conformation at the C-terminal end. In the present study, the expression of N-SbGPRP1, C-SbGPRP1, and ∆SbGPRP1 followed by antimicrobial assays showed potential antimicrobial property of the C-terminal peptide against gram-positive bacteria Bacillus subtilis and phytopathogen Rhodococcus fascians. The SbGPRP1 protein loses its antimicrobial property when the 23 amino acid sequence (GHGGHGVFGGGYGHGGYGHGYGG) from position 136 to 158 is deleted from the protein. Thus, it can be concluded that the 23 amino acid sequence is vital for the said antimicrobial property. NPN assay, SEM analysis, and electrolyte leakage assays showed potent antimicrobial activity for C-SbGPRP1. Overexpression of the C-SbGPRP1 mutant protein in tobacco followed by infection with Rhodococcus fascians inhibited bacterial growth as shown by SEM analysis. To determine if C-SbGPRP1 might target any protein on the bacterial membrane we isolated the bacterial membrane protein from both Bacillus subtilis and Rhodococcus fascians. Bacterial membrane protein that interacted with the column-bound C-SbGPRP1 was eluted and subjected to LC-MS/MS. LC-MS/MS data analysis showed peptide hit with membrane protein YszA from Bacillus subtilis and a membrane protein from Rhodococcus fascians. Isolated bacterial membrane protein from Bacillus subtilis or Rhodococcus fascians was able to reduce the antimicrobial activity of C-SbGPRP1. Furthermore, BiFC experiments showed interactions between C-SbGPRP1 and YszA protein from Bacillus subtilis leading to the conclusion that bacterial membrane protein was targeted in such membrane perturbation leading to antimicrobial activity.
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Affiliation(s)
- Shuddhanjali Roy
- Plant Functional Genomics Laboratory, Department of Botany, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, West Bengal, India
| | - Tanushree Agarwal
- Plant Functional Genomics Laboratory, Department of Botany, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, West Bengal, India
| | - Arup Das
- Plant Functional Genomics Laboratory, Department of Botany, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, West Bengal, India
| | - Tanmoy Halder
- Plant Functional Genomics Laboratory, Department of Botany, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, West Bengal, India
| | - Gouranga Upadhyaya
- Plant Functional Genomics Laboratory, Department of Botany, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, West Bengal, India
| | - Binay Chaubey
- Functional Genomics Laboratory, Department of Botany, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, West Bengal, India
| | - Sudipta Ray
- Plant Functional Genomics Laboratory, Department of Botany, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, West Bengal, India.
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Abstract
This review focuses on nonlytic outer membrane vesicles (OMVs), a subtype of bacterial extracellular vesicles (BEVs) produced by Gram-negative organisms focusing on the mechanisms of their biogenesis, cargo, and function. Throughout, we highlight issues concerning the characterization of OMVs and distinguishing them from other types of BEVs. We also highlight the shortcomings of commonly used methodologies for the study of BEVs that impact the interpretation of their functionality and suggest solutions to standardize protocols for OMV studies.
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Affiliation(s)
| | - Simon R. Carding
- Quadram Institute Bioscience, Norwich, United Kingdom
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom
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25
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Michel LV, Kaur R, Gleghorn ML, Holmquist M, Pryharski K, Perdue J, Jones SP, Jackson N, Pilo I, Kasper A, Labbe N, Pichichero M. Haemophilus influenzae Protein D antibody suppression in a multi-component vaccine formulation. FEBS Open Bio 2022; 12:2191-2202. [PMID: 36263849 PMCID: PMC9714371 DOI: 10.1002/2211-5463.13498] [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] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/20/2022] [Accepted: 10/19/2022] [Indexed: 01/25/2023] Open
Abstract
Nontypeable Haemophilus influenzae (NTHi) has emerged as a dominant mucosal pathogen causing acute otitis media (AOM) in children, acute sinusitis in children and adults, and acute exacerbations of chronic bronchitis in adults. Consequently, there is an urgent need to develop a vaccine to protect against NTHi infection. A multi-component vaccine will be desirable to avoid emergence of strains expressing modified proteins allowing vaccine escape. Protein D (PD), outer membrane protein (OMP) 26, and Protein 6 (P6) are leading protein vaccine candidates against NTHi. In pre-clinical research using mouse models, we found that recombinantly expressed PD, OMP26, and P6 induce robust antibody responses after vaccination as individual vaccines, but when PD and OMP26 were combined into a single vaccine formulation, PD antibody levels were significantly lower. We postulated that PD and OMP26 physiochemically interacted to mask PD antigenic epitopes resulting in the observed effect on antibody response. However, column chromatography and mass spectrometry analysis did not support our hypothesis. We postulated that the effect might be in vivo through the mechanism of protein vaccine immunologic antigenic competition. We found when PD and OMP26 were injected into the same leg or separate legs of mice, so that antigens were immunologically processed at the same or different regional lymph nodes, respectively, antibody levels to PD were significantly lower with same leg vaccination. Different leg vaccination produced PD antibody levels quantitatively similar to vaccination with PD alone. We conclude that mixing PD and OMP26 into a single vaccine formulation requires further formulation studies.
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Affiliation(s)
- Lea V. Michel
- School of Chemistry and Materials ScienceRochester Institute of TechnologyNYUSA
| | - Ravinder Kaur
- Center for Infectious Diseases and ImmunologyRochester General Hospital Research InstituteNYUSA
| | - Michael L. Gleghorn
- School of Chemistry and Materials ScienceRochester Institute of TechnologyNYUSA
| | - Melody Holmquist
- National Technical Institute for the DeafRochester Institute of TechnologyNYUSA
| | - Karin Pryharski
- Center for Infectious Diseases and ImmunologyRochester General Hospital Research InstituteNYUSA
| | - Janai Perdue
- School of Chemistry and Materials ScienceRochester Institute of TechnologyNYUSA
| | - Seth P. Jones
- School of Chemistry and Materials ScienceRochester Institute of TechnologyNYUSA
| | - Niaya Jackson
- School of Chemistry and Materials ScienceRochester Institute of TechnologyNYUSA
| | - Isabelle Pilo
- School of Chemistry and Materials ScienceRochester Institute of TechnologyNYUSA
| | - Anna Kasper
- School of Chemistry and Materials ScienceRochester Institute of TechnologyNYUSA
| | - Natalie Labbe
- School of Chemistry and Materials ScienceRochester Institute of TechnologyNYUSA
| | - Michael Pichichero
- Center for Infectious Diseases and ImmunologyRochester General Hospital Research InstituteNYUSA
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26
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Michel LV, Gaborski T. Outer Membrane Vesicles as Molecular Biomarkers for Gram-negative Sepsis: Taking Advantage of Nature's Perfect Packages. J Biol Chem 2022; 298:102483. [PMID: 36108741 PMCID: PMC9576880 DOI: 10.1016/j.jbc.2022.102483] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 07/13/2022] [Accepted: 09/08/2022] [Indexed: 11/18/2022] Open
Abstract
Sepsis is an often life-threatening response to infection, occurring when host pro-inflammatory immune responses become abnormally elevated and dysregulated. To diagnose sepsis, the patient must have a confirmed or predicted infection, as well as other symptoms associated with the pathophysiology of sepsis. However, a recent study found that a specific causal organism could not be determined in the majority (70.1%) of sepsis cases, likely due to aggressive antibiotics or localized infections. The timing of a patient's sepsis diagnosis is often predictive of their clinical outcome, underlining the need for a more definitive molecular diagnostic test. Here, we outline the advantages and challenges to using bacterial outer membrane vesicles (OMVs), nanoscale spherical buds derived from the outer membrane of Gram-negative bacteria, as a diagnostic biomarker for Gram-negative sepsis. Advantages include OMV abundance, their robustness in the presence of antibiotics, and their unique features derived from their parent cell that could allow for differentiation between bacterial species. Challenges include the rigorous purification methods required to isolate OMVs from complex biofluids and the additional need to separate OMVs from similarly-sized extracellular vesicles, which can share physical properties with OMVs.
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Affiliation(s)
- Lea Vacca Michel
- School of Chemistry and Materials Science, Rochester Institute of Technology, Rochester, New York, USA.
| | - Thomas Gaborski
- Department of Biomedical Engineering, Rochester Institute of Technology, Rochester, New York, USA
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27
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Wang S, Guo J, Bai Y, Sun C, Wu Y, Liu Z, Liu X, Wang Y, Wang Z, Zhang Y, Hao H. Bacterial outer membrane vesicles as a candidate tumor vaccine platform. Front Immunol 2022; 13:987419. [PMID: 36159867 PMCID: PMC9505906 DOI: 10.3389/fimmu.2022.987419] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/22/2022] [Indexed: 11/17/2022] Open
Abstract
Cancer represents a serious concern for human life and health. Due to drug resistance and the easy metastasis of tumors, there is urgent need to develop new cancer treatment methods beyond the traditional radiotherapy, chemotherapy, and surgery. Bacterial outer membrane vesicles (OMVs) are a type of double-membrane vesicle secreted by Gram-negative bacteria in the process of growth and life, and play extremely important roles in the survival and invasion of those bacteria. In particular, OMVs contain a large number of immunogenic components associated with their parent bacterium, which can be used as vaccines, adjuvants, and vectors to treat diseases, especially in presenting tumor antigens or targeted therapy with small-molecule drugs. Some OMV-based vaccines are already on the market and have demonstrated good therapeutic effect on the corresponding diseases. OMV-based vaccines for cancer are also being studied, and some are already in clinical trials. This paper reviews bacterial outer membrane vesicles, their interaction with host cells, and their applications in tumor vaccines.
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Affiliation(s)
- Shuming Wang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, School of Life Science, Inner Mongolia University, Hohhot, China
| | - Jiayi Guo
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, School of Life Science, Inner Mongolia University, Hohhot, China
| | - Yang Bai
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, School of Life Science, Inner Mongolia University, Hohhot, China
| | - Cai Sun
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, School of Life Science, Inner Mongolia University, Hohhot, China
| | - Yanhao Wu
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, School of Life Science, Inner Mongolia University, Hohhot, China
| | - Zhe Liu
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, School of Life Science, Inner Mongolia University, Hohhot, China
| | - Xiaofei Liu
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, School of Life Science, Inner Mongolia University, Hohhot, China
| | - Yanfeng Wang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, School of Life Science, Inner Mongolia University, Hohhot, China
| | - Zhigang Wang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, School of Life Science, Inner Mongolia University, Hohhot, China
| | - Yongmin Zhang
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, China
| | - Huifang Hao
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia University Research Center for Glycochemistry of Characteristic Medicinal Resources, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, China
- *Correspondence: Huifang Hao,
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28
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Liu X, Rong N, Sun W, Jian S, Chao J, Chen C, Chen R, Ding R, Chen C, Liu Y, Zhang X. The identification of polyvalent protective immunogens and immune abilities from the outer membrane proteins of Aeromonas hydrophila in fish. Fish Shellfish Immunol 2022; 128:101-112. [PMID: 35926820 DOI: 10.1016/j.fsi.2022.07.057] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 07/13/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
Among aquaculture vaccines, polyvalent vaccines (for immunoprotection against multiple bacterial species) are more efficient and can better avoid bacterial resistance and antibiotic residues in fish. Here, 15 outer membrane proteins (OMPs) of Aeromonas hydrophila were cloned and purified, and mouse antisera were prepared. Passive immunization to Carassius auratus showed that four OMPs sera (OmpW, OmpAII, P5, and AHA2685) and the entire OMPs serum held effective immunoprotection against A. hydrophila infection. Furthermore, the active immunization of four OMPs to C. auratus showed that OmpW, OmpAII, P5, and AHA2685 held effective immunoprotection against A. hydrophila, and OmpW held active cross-protection against Vibrio alginolyticus. The mechanisms of these four candidate vaccines in triggering immune responses were subsequently explored. They all could activate innate immune responses in active immunization, down-regulate (p < 0.05) the inflammation-related genes expression to reduce the inflammatory reaction induced by A. hydrophila, and down-regulate (p < 0.05) antioxidant-related factors to reduce the antioxidant reaction for bacterial infection. Noteablely, the four OMPs had protective abilities on kidney and spleen tissues of C. auratus after challenged with A. hydrophila and V. alginolyticus by histopathological observation. Collectively, our results identify OmpW as a polyvalent vaccine candidate, and OmpAII, P5, and AHA2685 as vaccine candidates against A. hydrophila infection in fish.
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Affiliation(s)
- Xiang Liu
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236041, China.
| | - Na Rong
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Wei Sun
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Sijie Jian
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Jia Chao
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Chunlin Chen
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236041, China
| | - Rui Chen
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Rui Ding
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Chen Chen
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Yong Liu
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236041, China.
| | - Xiaoying Zhang
- Chinese-German Joint Institute for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China; Centre of Molecular & Environmental Biology, Department of Biology, University of Minho, 4710-057, Braga, Portugal; Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada.
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Cui C, Guo T, Zhang S, Yang M, Cheng J, Wang J, Kang J, Ma W, Nian Y, Sun Z, Weng H. Bacteria-derived outer membrane vesicles engineered with over-expressed pre-miRNA as delivery nanocarriers for cancer therapy. Nanomedicine 2022; 45:102585. [PMID: 35901958 DOI: 10.1016/j.nano.2022.102585] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 06/13/2022] [Accepted: 07/03/2022] [Indexed: 06/15/2023]
Abstract
Outer membrane vesicles (OMVs) of Escherichia coli as nanoscale spherical vesicles have been recently used in cancer therapy as drug carriers. However, most of them need complicated methods to load cargos. Herein, we proposed an inexpensive and potentially mass-produced method for the preparation of OMV engineered with over-expressed pre-miRNA. In this work, we found that OMV can be released and inherit over-expressed tRNALys-pre-miRNA from mother E. coli that directly used for the tumor therapy. The eukaryotic cells infection experiments revealed that the over-expressed pre-miRNA inside OMV could be released and processed into mature miRNAs with the aid of the camouflage of "tRNA scaffold". Moreover, the group in vivo treated with targeted OMVtRNA-pre-miR-126 obviously inhibited the expression of target oncogenic CXCR4, and significantly restrain the proliferation of breast cancer tissues. Together, these findings indicated that the OMV-based platform is a versatile and powerful strategy for personalized tumor therapy directly and specificity.
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Affiliation(s)
- Chenyang Cui
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Tingting Guo
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Shuai Zhang
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Mingyan Yang
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Jiaqi Cheng
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Jiajia Wang
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Jie Kang
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Wenjie Ma
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Yuanru Nian
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Zhaowei Sun
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China.
| | - Haibo Weng
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China.
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Metcalf B, Nanduri S, Chochua S, Li Y, Fleming-Dutra K, McGee L, Beall B. Cluster Transmission Drives Invasive Group A Streptococcus Disease Within the United States and Is Focused on Communities Experiencing Disadvantage. J Infect Dis 2022; 226:546-553. [PMID: 35511035 PMCID: PMC11058745 DOI: 10.1093/infdis/jiac162] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 04/28/2022] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND Group A streptococci (GAS), although usually responsible for mild infections, can sometimes spread into normally sterile sites and cause invasive GAS disease (iGAS). Because both the risk of iGAS disease and occurrence of outbreaks are elevated within certain communities, such as those comprising people who inject drugs (PWID) and people experiencing homelessness (PEH), understanding the transmission dynamics of GAS is of major relevance to public health. METHODS We used a cluster detection tool to scan genomes of 7552 Streptococcus pyogenes isolates acquired through the population-based Active Bacterial Core surveillance (ABCs) during 2015-2018 to identify genomically related clusters representing previously unidentified iGAS outbreaks. RESULTS We found that 64.6% of invasive isolates were included within clusters of at least 4 temporally related isolates. Calculating a cluster odds ratio (COR) for each emm type revealed that types vary widely in their propensity to form transmission clusters. By incorporating additional epidemiological metadata for each isolate, we found that emm types with a higher proportion of cases occurring among PEH and PWID were associated with higher CORs. Higher CORs were also correlated with emm types that are less geographically dispersed. CONCLUSIONS Early identification of clusters with implementation of outbreak control measures could result in significant reduction of iGAS.
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Affiliation(s)
- Benjamin Metcalf
- Respiratory Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Srinivas Nanduri
- Respiratory Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Sopio Chochua
- Respiratory Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Yuan Li
- Respiratory Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Katherine Fleming-Dutra
- Respiratory Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Lesley McGee
- Respiratory Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Bernard Beall
- Respiratory Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
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Cho YN, Park SE, Cho EY, Cho HK, Park JY, Kang HM, Yun KW, Choi EH, Lee H. Distribution of emm genotypes in group A streptococcus isolates of Korean children from 2012 to 2019. J Microbiol Immunol Infect 2022; 55:671-677. [PMID: 35624007 DOI: 10.1016/j.jmii.2022.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 04/18/2022] [Accepted: 05/05/2022] [Indexed: 06/15/2023]
Abstract
OBJECTIVES Changes in the epidemiology of group A streptococcus (GAS) infection is related to emm genotype. We studied the distribution of emm genotypes and their antibiotic susceptibility among Korean children. METHODS Isolates from children with GAS infection between 2012 and 2019 were collected. emm typing and cluster analysis was performed according to the Centers for Disease Control emm cluster classification. Antimicrobial susceptibility was tested using the E-test and resistance genes were analyzed for macrolide resistant phenotypes. RESULTS Among 169 GAS isolates, 115 were from children with scarlet fever. Among invasive isolates, emm1 (6/22, 27.3%), emm12 (4/22, 18.2%), and emm4 (4/22, 18.2%) were most common. In scarlet fever, although emm4 (38/115, 33.0%) was the most prevalent throughout the study period, emm4 was replaced by emm3 (28/90, 31.1%) during an outbreak in 2017-2018. Among all isolates, only 2 (1.2%) exhibited erythromycin resistance and harbored both ermA and ermB genes. CONCLUSIONS In this analysis of GAS isolated from Korean children, emm1 was the most prevalent in invasive infection. In scarlet fever, emm4 was prevalent throughout the study period, with an increase in emm3 during 2017-2018. GAS isolates during 2012-2019 demonstrated low erythromycin resistance.
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Affiliation(s)
- You Na Cho
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Su Eun Park
- Department of Pediatrics, Pusan National University Children's Hospital, Yangsan, Republic of Korea
| | - Eun Young Cho
- Department of Pediatrics, Chungnam National University Hospital, Daejeon, Republic of Korea
| | - Hye Kyung Cho
- Department of Pediatrics, Gachon University College of Medicine, Incheon, Republic of Korea
| | - Ji Young Park
- Department of Pediatrics, Chung-Ang University Hospital, Seoul, Republic of Korea
| | - Hyun-Mi Kang
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ki Wook Yun
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea; Department of Pediatrics, Seoul National University Children's Hospital, Seoul, Republic of Korea
| | - Eun Hwa Choi
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea; Department of Pediatrics, Seoul National University Children's Hospital, Seoul, Republic of Korea
| | - Hyunju Lee
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea; Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
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Sinsinbar G, Gudlur S, Liedberg B. Rapid Detection of Escherichia coli: Optimized Peptide-Polythiophene Interactions Help Reduce Assay Time and Improve Naked-Eye Detection. ACS Appl Mater Interfaces 2022; 14:31541-31550. [PMID: 35797225 DOI: 10.1021/acsami.2c03294] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Recent improvements in methods for rapid detection of microbial contamination in food and water samples have aided in the development of on-site and point-of-care testing. Early detection, made possible via on-site testing, can help limit the spread of food and waterborne illnesses. Recently, we reported a novel fluorescence-based Omptin-Polythiophene assay (the assay) to detect Escherichia coli in contaminated water samples. The assay targets OmpT─an E. coli outer membrane protease─and exploits the protease's ability to cleave at dibasic sites within a peptide. By combining a peptide substrate optimized for OmpT with a conjugated polythiophene reporter molecule whose optical properties vary upon interaction with the intact or cleaved peptide, we demonstrated the detection of 1-10 CFU/mL and 105 CFU/mL E. coli in 5.5 and 1 h, respectively. In comparison, most microbial detection methods that rely on culturing and plating techniques take anywhere between 8 and 24 h to report their results. Herein we report significant improvements in the assay which include reducing the assay time from an already short 1 h to a mere 10 min for detecting E. coli in highly contaminated samples and augmenting the assay with colorimetric sensing capability for naked eye discernment under normal visible light or under UV-A light. These improvements were made possible by characterizing the optical changes resulting from the interaction of the peptide with five carboxylate-functionalized polythiophene variants carrying different 3- side chain carboxylic acids and by identifying preferential peptide substrates via the screening of ten peptide sequence variants for OmpT activity.
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Affiliation(s)
- Gaurav Sinsinbar
- Center for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore
| | - Sushanth Gudlur
- Center for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore
| | - Bo Liedberg
- Center for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore
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Zhang W, Zhou H, Jiang Y, He J, Yao Y, Wang J, Liu X, Leptihn S, Hua X, Yu Y. Acinetobacter baumannii Outer Membrane Protein A Induces Pulmonary Epithelial Barrier Dysfunction and Bacterial Translocation Through The TLR2/IQGAP1 Axis. Front Immunol 2022; 13:927955. [PMID: 35844614 PMCID: PMC9280087 DOI: 10.3389/fimmu.2022.927955] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 06/02/2022] [Indexed: 01/15/2023] Open
Abstract
Pulmonary epithelial barrier dysfunction is a critical pathophysiological process in pneumonia and associated invasive infections, such as those caused by Acinetobacter baumannii. However, the mechanisms underlying A. baumannii-induced pulmonary epithelial barrier dysfunction and bacterial translocation remain unclear. In this study, lungs of mice and A549 human epithelial cell monolayers were challenged with the A. baumannii wild-type strain and an outer membrane protein A (ompA) deletion strain. In addition, epithelial cells in culture were treated with purified OmpA protein or transfected with a eukaryotic expression vector encoding ompA (pCMV-ompA). Bacterial translocation across cell monolayers and intrapulmonary burden were measured, barrier function was evaluated in vivo and in vitro; cell migration ability was determined. The specific inhibitors C29 and JSH-23 were used to suppress the activity of Toll-like receptor 2 (TLR2) and of NF-κB, respectively. IQ-GTPase-activating protein 1 (IQGAP1) small interfering RNA was used to knock down endogenous IQGAP1 expression. In this work, we show that OmpA from A. baumannii increased the production of pro-inflammatory cytokines, remodeled the cytoskeleton, and internalized intercellular adherens junctions (AJs); these changes eventually induced pulmonary epithelial barrier dysfunction to promote bacterial translocation. IQGAP1-targeting small interfering RNA and chemical inhibition of TLR2 or NF-κB prevented high permeability of the pulmonary epithelial barrier. TLR2/NF-κB signaling was involved in OmpA-induced inflammation, IQGAP1-mediated OmpA-induced opening of the pulmonary epithelial barrier via cytoskeleton dynamic remodeling, and cellular redistribution of the major AJ protein, E-cadherin. These observations indicate that A. baumannii uses OmpA to overcome epithelial defences and cross the pulmonary epithelial barrier.
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Affiliation(s)
- Wang Zhang
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China
| | - Hua Zhou
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yan Jiang
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China
| | - Jintao He
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China
| | - Yue Yao
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China
| | - Jianfeng Wang
- Department of Respiratory and Critical Care Medicine, Zhejiang Provincial Hospital of Chinese Medicine, Hangzhou, China
| | - Xiaochen Liu
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China
| | - Sebastian Leptihn
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Zhejiang University-University of Edinburgh Institute, Zhejiang University, Haining, China
- University of Edinburgh Medical School, Biomedical Sciences, College of Medicine and Veterinary Medicine, The University of Edinburgh, Edinburgh, United Kingdom
| | - Xiaoting Hua
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China
- *Correspondence: Yunsong Yu, ; Xiaoting Hua,
| | - Yunsong Yu
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, China
- *Correspondence: Yunsong Yu, ; Xiaoting Hua,
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Ayub A, Usman M, Ihsan A, Ain Q, Awan AB, Wajid M, Ali A, Haque A, Iqbal M, Sarwar Y. Immunological characterization of chitosan adjuvanted outer membrane proteins of Salmonella enterica serovar Typhi as multi-epitope typhoid vaccine candidate. Mol Biol Rep 2022; 49:7377-7387. [PMID: 35713798 DOI: 10.1007/s11033-022-07531-w] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 04/25/2022] [Accepted: 04/27/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Outer membrane proteins (OMPs) of Gram-negative bacteria have been known as potential vaccine targets due to their antigenic properties and host specificity. Here, we focused on the exploration of the immunogenic potential and protective efficacy of total OMPs of Salmonella enterica serovar Typhi due to their multi epitope properties, adjuvanted with nanoporous chitosan particles (NPCPs). The study was designed to extrapolate an effective, low cost prophylactic approach for typhoid fever being getting uncontrolled in Pakistan due to emergence of extensively drug resistant (XDR) strains. METHODS & RESULTS The OMPs of two S. Typhi variants (with and without Vi capsule) alone and with nanoporous chitosan particles as adjuvant were comparatively analyzed for immunogenic potential in mice. Adaptive immunity was evaluated by ELISA and relative quantification of cytokine gene expression (IL4, IL6, IL9, IL17, IL10, TNF, INF and PPIA as house keeping gene) using RT-qPCR. Statistical analysis was done using Welch's test. The protection was recorded by challenging the immunized mice with 50% ×LD50 of S. Typhi. The Vi + ve-OMPs of S. Typhi showed the most promising results by ELISA and significantly high expression of IL-6, IL-10 and IL-17 and 92.5% protective efficacy with no detectable side effects. CONCLUSION We can conclude that the OMPs of Vi + ve S. Typhi are the most promising candidates for future typhoid vaccines because of cost effective preparation without expensive purification steps and multi-epitope properties. Chitosan adjuvant may have applications for oral protein based vaccines but found less effective in injectable preparations.
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Affiliation(s)
- Ambreen Ayub
- National Institute for Biotechnology & Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan
- Institute of Engineering & Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Muhammad Usman
- National Institute for Biotechnology & Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan
- Institute of Engineering & Applied Sciences (PIEAS), Islamabad, Pakistan
- Faculty of Veterinary and Animal Sciences, Muhammad Nawaz Shareef University of Agriculture, Multan, Pakistan
| | - Ayesha Ihsan
- National Institute for Biotechnology & Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan
- Institute of Engineering & Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Quratul Ain
- National Institute for Biotechnology & Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan
- Institute of Engineering & Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Asad Bashir Awan
- National Institute for Biotechnology & Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan
- Institute of Engineering & Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Muhammad Wajid
- National Institute for Biotechnology & Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan
- Institute of Engineering & Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Aamir Ali
- National Institute for Biotechnology & Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan
- Institute of Engineering & Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Abdul Haque
- Akhuwat Faisalabad Institute For Research In Science & Technology, Faisalabad, Pakistan
| | - Mazhar Iqbal
- National Institute for Biotechnology & Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan
- Institute of Engineering & Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Yasra Sarwar
- National Institute for Biotechnology & Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan.
- Institute of Engineering & Applied Sciences (PIEAS), Islamabad, Pakistan.
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Ma Y, Zhao Y, Chen R, Sun W, Zhang Y, Qiao H, Chang Y, Kang S, Zhang Y. Mucosal immunity of mannose-modified chitosan microspheres loaded with the nontyepable Haemophilus influenzae outer membrane protein P6 in BALB/c mice. PLoS One 2022; 17:e0269153. [PMID: 35687548 PMCID: PMC9187061 DOI: 10.1371/journal.pone.0269153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 05/16/2022] [Indexed: 11/18/2022] Open
Abstract
Nontypeable Haemophilus influenzae (NTHi) is a common opportunistic pathogen that colonizes the nasopharynx. NTHi infections result in enormous global morbidity in two clinical settings: otitis media in children and acute exacerbation of chronic obstructive pulmonary disease (COPD) in adults. Thus, there is an urgent need to design and develop effective vaccines to prevent morbidity and reduce antibiotic use. The NTHi outer membrane protein P6, a potential vaccine candidate, is highly conserved and effectively induces protective immunity. Here, to enhance mucosal immune responses, P6-loaded mannose-modified chitosan (MC) microspheres (P6-MCMs) were developed for mucosal delivery. MC (18.75%) was synthesized by the reductive amination reaction method using sodium cyanoborohydride (NaBH3CN), and P6-MCMs with an average size of 590.4±16.2 nm were successfully prepared via the tripolyphosphate (TPP) ionotropic gelation process. After intranasal immunization with P6-MCMs, evaluation of humoral immune responses indicated that P6-MCMs enhance both systemic and mucosal immune responses. Evaluation of cellular immune responses indicated that P6-MCMs enhance cellular immunity and trigger a mixed Th1/Th2-type immune response. Importantly, P6-MCMs also trigger a Th17-type immune response. They are effective in promoting lymphocyte proliferation and differentiation without toxicity in vitro. The results also demonstrate that P6-MCMs can effectively induce MHC class I- and II-restricted cross-presentation, promoting CD4+-mediated Th immune responses and CD8+-mediated cytotoxic T lymphocyte (CTL) immune responses. Evaluation of protective immunity indicated that immunization with P6-MCMs can reduce inflammation in the nasal mucosa and the lung and prevent NTHi infection. In conclusion, MCMs are a promising adjuvant-delivery system for vaccines against NTHi.
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Affiliation(s)
- Yushuai Ma
- Institute of Pathogen Biology and Immunology, Hebei North University, Zhangjiakou, Hebei Province, China
| | - Ying Zhao
- Institute of Pathogen Biology and Immunology, Hebei North University, Zhangjiakou, Hebei Province, China
| | - Rui Chen
- Institute of Pathogen Biology and Immunology, Hebei North University, Zhangjiakou, Hebei Province, China
| | - Wanru Sun
- Institute of Pathogen Biology and Immunology, Hebei North University, Zhangjiakou, Hebei Province, China
| | - Yanxia Zhang
- Department of Microbiology, Hebei North University, Zhangjiakou, Hebei Province, China
| | - Haixia Qiao
- Department of Microbiology, Hebei North University, Zhangjiakou, Hebei Province, China
| | - Yueli Chang
- Department of Microbiology, Hebei North University, Zhangjiakou, Hebei Province, China
| | - Shaoping Kang
- Department of Immunology, Hebei North University, Zhangjiakou, Hebei Province, China
| | - Yutuo Zhang
- Department of Microbiology, Hebei North University, Zhangjiakou, Hebei Province, China
- * E-mail:
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Ghosh S, Mohamed Z, Shin JH, Bint E Naser SF, Bali K, Dörr T, Owens RM, Salleo A, Daniel S. Impedance sensing of antibiotic interactions with a pathogenic E. coli outer membrane supported bilayer. Biosens Bioelectron 2022; 204:114045. [PMID: 35180690 PMCID: PMC9526520 DOI: 10.1016/j.bios.2022.114045] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 01/19/2022] [Accepted: 01/25/2022] [Indexed: 11/18/2022]
Abstract
Antibiotic resistance is a growing global health concern due to the decreasing number of antibiotics available for therapeutic use as more drug-resistant bacteria develop. Changes in the membrane properties of Gram-negative bacteria can influence their response to antibiotics and give rise to resistance. Thus, understanding the interactions between the bacterial membrane and antibiotics is important for elucidating microbial membrane properties to use for designing novel antimicrobial drugs. To study bacterial membrane-antibiotic interactions, we created a surface-supported planar bacterial outer membrane model on an optically-transparent, conducting polymer surface (poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS)). This model enables membrane characterization using fluorescence microscopy and electrochemical impedance spectroscopy (EIS). The membrane platform is fabricated using outer membrane vesicles (OMVs) isolated from clinically relevant Gram-negative bacteria, enterohemorrhagic Escherichia coli. This approach enables us to mimic the native components of the bacterial membrane by incorporating native lipids, membrane proteins, and lipopolysaccharides. Using EIS, we determined membrane impedance and captured membrane-antibiotic interactions using the antibiotics polymyxin B, bacitracin, and meropenem. This sensor platform incorporates aspects of the biological complexity found in bacterial outer membranes and, by doing so, offers a powerful, biomimetic approach to the study of antimicrobial drug interactions.
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Affiliation(s)
- Surajit Ghosh
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY, USA
| | - Zeinab Mohamed
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Jung-Ho Shin
- Weill Institute for Cell and Molecular Biology and Department of Microbiology, Cornell, University, Ithaca, NY, USA
| | | | - Karan Bali
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Tobias Dörr
- Weill Institute for Cell and Molecular Biology and Department of Microbiology, Cornell, University, Ithaca, NY, USA
| | - Róisín M Owens
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Alberto Salleo
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - Susan Daniel
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY, USA; Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA.
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Thomas S. Structure-Based Design of Diagnostics and Vaccines for Lyme Disease. Methods Mol Biol 2022; 2410:411-422. [PMID: 34914060 DOI: 10.1007/978-1-0716-1884-4_21] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Changes in climate have increased the geographical range of insect vectors responsible for the transmission of several diseases. Lyme disease, caused by the bacterial pathogen Borrelia burgdorferi, has become recognized as the most prevalent arthropod-borne infection in the USA. It is transmitted to humans through the bite of infected blacklegged ticks. As yet, there are no commercial vaccines available that effectively provide protection against Lyme disease. Vaccination strategies involving use of subunit vaccines developed in many laboratories have been found to be less efficient in protecting against the disease. Hence, there is a need to develop powerful vaccines that provide robust protection against Borrelia. Recently, using the principle of structure-based design, we designed and developed novel diagnostics and vaccine candidates that protected against Lyme disease in animal models. This chapter describes design and development of peptides based on the principle of structure-based design for use in diagnostics and vaccines to protect against Lyme disease in an animal model.
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Affiliation(s)
- Sunil Thomas
- Lankenau Institute for Medical Research, Wynnewood, PA, USA.
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Hall SCL, Clifton LA, Sridhar P, Hardy DJ, Wotherspoon P, Wright J, Whitehouse J, Gamage N, Laxton CS, Hatton C, Hughes GW, Jeeves M, Knowles TJ. Surface-tethered planar membranes containing the β-barrel assembly machinery: a platform for investigating bacterial outer membrane protein folding. Biophys J 2021; 120:5295-5308. [PMID: 34757080 PMCID: PMC8715194 DOI: 10.1016/j.bpj.2021.10.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 09/06/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022] Open
Abstract
The outer membrane of Gram-negative bacteria presents a robust physicochemical barrier protecting the cell from both the natural environment and acting as the first line of defense against antimicrobial materials. The proteins situated within the outer membrane are responsible for a range of biological functions including controlling influx and efflux. These outer membrane proteins (OMPs) are ultimately inserted and folded within the membrane by the β-barrel assembly machine (Bam) complex. The precise mechanism by which the Bam complex folds and inserts OMPs remains unclear. Here, we have developed a platform for investigating Bam-mediated OMP insertion. By derivatizing a gold surface with a copper-chelating self-assembled monolayer, we were able to assemble a planar system containing the complete Bam complex reconstituted within a phospholipid bilayer. Structural characterization of this interfacial protein-tethered bilayer by polarized neutron reflectometry revealed distinct regions consistent with known high-resolution models of the Bam complex. Additionally, by monitoring changes of mass associated with OMP insertion by quartz crystal microbalance with dissipation monitoring, we were able to demonstrate the functionality of this system by inserting two diverse OMPs within the membrane, pertactin, and OmpT. This platform has promising application in investigating the mechanism of Bam-mediated OMP insertion, in addition to OMP function and activity within a phospholipid bilayer environment.
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Affiliation(s)
- Stephen C L Hall
- ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Oxfordshire, United Kingdom
| | - Luke A Clifton
- ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Oxfordshire, United Kingdom
| | - Pooja Sridhar
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - David J Hardy
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Peter Wotherspoon
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Jack Wright
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
| | - James Whitehouse
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
| | - Nadisha Gamage
- Membrane Protein Laboratory, Diamond Light Source, Harwell Science & Innovation Campus, Oxfordshire, United Kingdom
| | - Claire S Laxton
- School of Life Sciences, University of Nottingham, Nottingham, United Kingdom
| | - Caitlin Hatton
- School of Life Sciences, University of Warwick, Coventry, United Kingdom
| | - Gareth W Hughes
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Mark Jeeves
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Timothy J Knowles
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom.
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Naghipour Erami A, Rasooli I, Jahangiri A, Darvish Alipour Astaneh S. Anti-Omp34 antibodies protect against Acinetobacter baumannii in a murine sepsis model. Microb Pathog 2021; 161:105291. [PMID: 34798280 DOI: 10.1016/j.micpath.2021.105291] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/10/2021] [Accepted: 11/12/2021] [Indexed: 12/29/2022]
Abstract
Acinetobacter baumannii, an opportunistic extracellular pathogen is one of the major causes of nosocomial infections. Omp34, also known as Omp33-36, is a bacterial porin protein involved in the virulence and fitness of this pathogen by adhesion to the host cell. This antigen nominated as an appropriate candidate for immunization against A. baumannii. In this study, the expression of the recombinant Omp34 (rOmp34) was carried out in E. coli BL21 (DE3). The immunogenicity of the rOmp34 in A. baumannii was studied in a murine sepsis model. Antibody response in mice injected with the recombinant protein was assessed using indirect ELISA. Bactericidal activity of rOmp34-immunized mice sera (1:10 dilution) against A. baumannii ATCC 19606 after 0, 1, 2, 4, and 8 h of incubation at 37 °C was assessed. In addition to survival rate, load of bacteria in liver and spleen of the infected mice were evaluated. A high titer of specific antibody equivalent to optical density of 1.54 ± 0.06 against rOmp34 was elicited in the immunized mice sera. Viability of the A. baumannii incubated 8 h with immunized mice sera was 64%. Homogenized liver and spleen samples of the control mice challenged with A. baumannii were loaded with 8 × 103 and 9 × 103 CFU per gram tissue respectively 48 h post-challenge as against complete clearance of A. baumannii in the immunized group. The protective immunity was achieved by challenging the mice groups with 5 × LD50 of live A. baumannii. Omp34 can be nominated as an immunogen that can bring about protection against Acinetobacter baumannii.
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Affiliation(s)
| | - Iraj Rasooli
- Department of Biology, Shahed University, Tehran-Qom Express Way, Iran; Molecular Microbiology Research Center, Shahed University, Tehran-Qom Express Way, Iran.
| | - Abolfazl Jahangiri
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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Yamamoto T, Hasegawa Y, Lau PCK, Iwaki H. Identification and characterization of a chc gene cluster responsible for the aromatization pathway of cyclohexanecarboxylate degradation in Sinomonas cyclohexanicum ATCC 51369. J Biosci Bioeng 2021; 132:621-629. [PMID: 34583900 DOI: 10.1016/j.jbiosc.2021.08.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/26/2021] [Accepted: 08/30/2021] [Indexed: 11/18/2022]
Abstract
Cyclohexanecarboxylate (CHCA) is formed by oxidative microbial degradation of n-alkylcycloparaffins and anaerobic degradation of benzoate, and also known to be a synthetic intermediate or the starter unit of biosynthesis of cellular constituents and secondary metabolites. Although two degradation pathways have been proposed, genetic information has been limited to the β-oxidation-like pathway. In this study, we identified a gene cluster, designated chcC1XTC2B1B2RAaAbAc, that is responsible for the CHCA aromatization pathway in Sinomonas (formerly Corynebacterium) cyclohexanicum strain ATCC 51369. Reverse transcription-PCR analysis indicated that the chc gene cluster is inducible by CHCA and that it consists of two transcriptional units, chcC1XTC2B1B2R and chcAaAbAc. Overexpression of the various genes in Escherichia coli, and purification of the recombinant proteins led to the functional characterization of ChcAaAbAc as subunits of a cytochrome P450 system responsible for CHCA hydroxylation; ChcB1 and ChcB2 as trans-4-hydroxyCHCA and cis-4-hydroxyCHCA dehydrogenases, respectively; ChcC1 was identified as a 4-oxoCHCA desaturase containing a covalently bound FAD; and ChcC2 was identified as a 4-oxocyclohexenecarboxylate desaturase. The binding constant of ChcAa for CHCA was found to be 0.37 mM. Kinetic parameters established for ChcB1 indicated that it has a high catalytic efficiency towards 4-oxoCHCA compared to trans- or cis-4-hydroxyCHCA. The Km and Kcat values of ChcC1 for 4-oxoCHCA were 0.39 mM and 44 s-1, respectively. Taken together with previous work on the identification of a pobA gene encoding a 4-hydroxybenzoate hydroxylase, we have now localized the remaining set of genes for the final degradation of protocatechuate before entry into the tricarboxylic acid cycle.
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Affiliation(s)
- Taisei Yamamoto
- Department of Life Science & Biotechnology, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan
| | - Yoshie Hasegawa
- Department of Life Science & Biotechnology, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan
| | - Peter C K Lau
- Department of Microbiology & Immunology, McGill University, Montréal, Québec, H3A 2B4, Canada
| | - Hiroaki Iwaki
- Department of Life Science & Biotechnology, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan.
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Gaspar EB, Prudencio CR, De Gaspari E. Experimental studies using OMV in a new platform of SARS-CoV-2 vaccines. Hum Vaccin Immunother 2021; 17:2965-2968. [PMID: 33950776 PMCID: PMC8108191 DOI: 10.1080/21645515.2021.1920272] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 04/15/2021] [Indexed: 12/26/2022] Open
Abstract
Although COVID-19 vaccines have recently been approved for emergency use, search for new vaccines are still urgent, since the access of the countries, especially the poorest, to the vaccines, has shown to be slower than the necessary to rapidly control the pandemic. We proposed a novel platform for vaccine using recombinant receptor binding domain (rRBD) from Sars-Cov-2 spike protein and Neisseria meningitidis outer membrane vesicles (OMVs). The antigen preparation produced a humoral and cellular immune response. Taken together our findings suggest a good immunostimulatory patter in response to immunization with rRBD plus N. meningitidis OMV.
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Affiliation(s)
- Emanuelle B. Gaspar
- Animal Health Department, Embrapa Southern Region Animal Husbandry, Bagé, Brazil
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Abstract
Lasso peptides, a class of ribosomally synthesized and post-translationally modified peptides (RiPPs) secreted by bacteria, have antimicrobial activity. Here, a novel lasso peptide, microcin Y (MccY), was discovered and characterized. The gene cluster for MccY synthesis was cloned for expression in Escherichia coli. This peptide was purified by HPLC and characterized by Q-TOF. MIC assays showed that some Bacillus, Staphylococcus, Pseudomonas, Shigella, and Salmonella strains were sensitive to MccY. Interestingly, Salmonellatyphimurium and Salmonella infantis were efficiently inhibited by MccY, while they were not affected by MccJ25, a lasso peptide that has antibacterial effects on many Salmonella strains. Furthermore, MccY-resistant strains of S. typhimurium were screened, and mutations were found in FhuA and SbmA, indicating the importance of these transporters for MccY absorption. This novel peptide can greatly broaden the antimicrobial spectrum of MccJ25 in Salmonella and is expected to be used in food preservation and animal feed additive areas.
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Affiliation(s)
- Yu Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Yu Han
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Zhiwei Zeng
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Wenjing Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Saixiang Feng
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, People's Republic of China
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, People's Republic of China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, People's Republic of China
- Key Laboratory of Veterinary Vaccine Innovation of the Ministry of Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, People's Republic of China
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Weisheng Cao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, People's Republic of China
- Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, People's Republic of China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, People's Republic of China
- Key Laboratory of Veterinary Vaccine Innovation of the Ministry of Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, People's Republic of China
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, South China Agricultural University, Guangzhou 510642, People's Republic of China
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Manning C, O’Neill C, Clarke IN, Rebec M, Cliff PR, Marsh P. High-resolution genotyping of Lymphogranuloma Venereum (LGV) strains of Chlamydia trachomatis in London using multi-locus VNTR analysis-ompA genotyping (MLVA-ompA). PLoS One 2021; 16:e0254233. [PMID: 34237111 PMCID: PMC8266103 DOI: 10.1371/journal.pone.0254233] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 06/22/2021] [Indexed: 12/02/2022] Open
Abstract
Background Lymphogranuloma venereum (LGV) is caused by Chlamydia trachomatis strains with ompA genotypes L1 to L3. An LGV epidemic associated with the L2b genotype has emerged in the past few decades amongst men who have sex with men (MSM). C. trachomatis genotypes can be discriminated by outer membrane protein A gene (ompA) sequencing, however this method has limited resolution. This study employed a high-resolution genotyping method, namely, multi-locus tandem repeat (VNTR) analysis with ompA sequencing (MLVA-ompA), to assess the distribution of LGV MLVA-ompA genotypes amongst individuals attending genitourinary medicine (GUM) clinics in London. Methods Clinical specimens were collected from individuals attending eight London-based GUM clinics. Specimens that tested positive for C. trachomatis by commercial nucleic acid amplification test (NAAT) were confirmed as LGV by pmpH real-time PCR. LGV-positive DNA extracts were subsequently genotyped using MLVA-ompA. Results Two hundred and thirty DNA extracts were confirmed as LGV, and 162 (70%) yielded complete MLVA-ompA genotypes. Six LGV MLVA-ompA genotypes were identified: 1.9.2b-L2, 1.9.3b-L2b, 1.9.2b-L2b, 1.9.2b-L2b/D, 1.4a.2b-L2b, and 5.9.2b-L1. The following LGV ompA genotypes were identified (in descending order of abundance): L2, L2b, L2b/D, and L1. Eight ompA sequences with the hybrid L2b/D profile were detected. The hybrid sequence was identical to the ompA of a recombinant L2b/D strain detected in Portugal in 2017. Conclusions The L2 ompA genotype was found to predominate in the London study population. The study detected an unusual hybrid L2b/D ompA profile that was previously reported in Portugal. We recommend further monitoring and surveillance of LGV strains within the UK population.
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Affiliation(s)
- Chloe Manning
- Department of Molecular Microbiology, Division of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
- * E-mail:
| | - Colette O’Neill
- Department of Molecular Microbiology, Division of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Ian N. Clarke
- Department of Molecular Microbiology, Division of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Monica Rebec
- Department of Microbiology, Imperial College Healthcare NHS Trust, Charing Cross Hospital, London, United Kingdom
| | - Penelope R. Cliff
- Department of Infection Sciences, St Thomas’ Hospital, London, United Kingdom
| | - Peter Marsh
- Public Health England, Porton Down, Salisbury, United Kingdom
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Abstract
Recent reemergence of pertussis (whooping cough) in highly vaccinated populations and rapid expansion of Bordetella pertussis strains lacking pertactin (PRN), a common acellular vaccine antigen, have raised the specter of vaccine-driven evolution and potential return of what was once the major killer of children. The discovery that most circulating B. pertussis strains in the United States have acquired new and independent disruptive mutations in PRN is compelling evidence of strong selective pressure. However, the other 4 antigens included in acellular vaccines do not appear to be selected against so rapidly. We consider 3 aspects of PRN that distinguish it from other vaccine antigens, which might, individually or collectively, explain why only this antigen is being precipitously eliminated. An understanding of the increase in PRN-deficient strains should provide useful information for the current search for new protective antigens and provide broader lessons for the design of improved subunit vaccines.
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Wang Y, Wang Y, Ren C, Wang H, Zhang Y, Xiu Y. Upregulation of centromere protein K is crucial for lung adenocarcinoma cell viability and invasion. ADV CLIN EXP MED 2021; 30:691-699. [PMID: 34118147 DOI: 10.17219/acem/133820] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Identification of functional genes or biomarkers may be helpful for developing new treatment strategies in lung adenocarcinoma (LUAD). The centromere protein K (CENPK) gene has been discovered to be overexpressed and could influence tumor progression in several tumor types. However, its role in LUAD has never been revealed. OBJECTIVES The purpose of the current study was to detect the effects of CENPK and its mechanisms in the progression of LUAD. MATERIAL AND METHODS Data from The Cancer Genome Atlas (TCGA) and Oncomine databases was used to analyze the expression of CENPK. The relationship between CENPK expression and the prognosis of LUAD was investigated using Kaplan-Meier and Cox regression analyses. The cell viability was monitored with Cell Counting Kit-8 (CCK-8) and colony forming assays, while migration and invasion were analyzed with a transwell assay. The effect of CENPK on the expression of epithelial-mesenchymal transition (EMT) markers were estimated using western blotting. RESULTS CENPK was significantly overexpressed in LUAD tissues and cells (p < 0.01). The overall survival rate in the low CENPK expression group was significantly higher than in the high CENPK expression group (p = 0.003). Furthermore, the overexpression of CENPK facilitated cell viability, migration and invasion of tumor cells, while knockdown of CENPK prevented these behaviors (p < 0.01). Moreover, upregulation of CENPK decreased the expression of E-cadherin and enhanced the expression of N-cadherin, vimentin and Snail in LUAD cells (p < 0.01). Conversely, knockdown of CENPK resulted in the opposite trend (p < 0.01). CONCLUSIONS CENPK was upregulated in LUAD tissues and cells, and the enhancement of CENPK promoted the viability, migration, invasion, and EMT of LUAD cells.
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Affiliation(s)
- Yongbo Wang
- Department of Respiratory Medicine, Second Affiliated Hospital of Mudanjiang Medical University, China
| | - Yue Wang
- Department of Respiratory Medicine, Second Affiliated Hospital of Mudanjiang Medical University, China
| | - Chunna Ren
- Medical Laboratory, Second Affiliated Hospital of Mudanjiang Medical University, China
| | - Haicun Wang
- Internal Medicine-Cardiovascular Department, Second Affiliated Hospital of Mudanjiang Medical University, China
| | - Yang Zhang
- Medical Laboratory, Second Affiliated Hospital of Mudanjiang Medical University, China
| | - Yunxia Xiu
- Medical Laboratory, Second Affiliated Hospital of Mudanjiang Medical University, China
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Tyrrell GJ, Bell C, Bill L, Fathima S. Increasing Incidence of Invasive Group A Streptococcus Disease in First Nations Population, Alberta, Canada, 2003-2017. Emerg Infect Dis 2021; 27:443-451. [PMID: 33496247 PMCID: PMC7853581 DOI: 10.3201/eid2702.201945] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The incidence of invasive group A Streptococcus (iGAS) disease in the general population in Alberta, Canada, has been steadily increasing. To determine whether rates for specific populations such as First Nations are also increasing, we investigated iGAS cases among First Nations persons in Alberta during 2003-2017. We identified cases by isolating GAS from a sterile site and performing emm typing. We collected demographic, social, behavioral, and clinical data for patients. During the study period, 669 cases of iGAS in First Nations persons were reported. Incidence increased from 10.0 cases/100,000 persons in 2003 to 52.2 cases/100,000 persons in 2017. The 2017 rate was 6 times higher for the First Nations population than for non-First Nations populations (8.7 cases/100,000 persons). The 5 most common emm types from First Nations patients were 59, 101, 82, 41, and 11. These data indicate that iGAS is severely affecting the First Nations population in Alberta, Canada.
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Chakraborty J. In-silico structural analysis of Pseudomonas syringae effector HopZ3 reveals ligand binding activity and virulence function. J Plant Res 2021; 134:599-611. [PMID: 33730245 DOI: 10.1007/s10265-021-01274-8] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Bacterial acetyltransferase effectors belonging to the Yersinia outer protein J (YopJ) group inhibit multiple immune signaling pathways in human and plants. The present study determines in-silico acetyl-coenzyme A (AcCoA) binding and Arabidopsis immune regulator RPM1-interacting protein4 (RIN4) peptide interactions to YopJ effector hypersensitivity and pathogenesis-dependent outer proteinZ3 (HopZ3) from Pseudomonas syringae. Phylogenetic analysis revealed that HopZ3 was clustered by acetyltransferase effectors from plant bacterial pathogens. Structural juxtaposition shows HopZ3 comprises topology matched closer with HopZ1a than PopP2 effectors, respectively. AcCoA binds HopZ3 at two sites i.e., substrate binding pocket and catalytic site. AcCoA interactions to substrate binding pocket was transient and dissipated upon in-silico mutation of Ser 279 residue whereas, attachment to catalytic site was found to be stable in the presence of inositol hexaphosphate (IP6) as a co-factor. Interface atoms used for measuring hydrogen bond distances, bound or accessible surface area, and root-mean-square fluctuation (RMSF) values, suggests that the HopZ3 complex stabilizes after binding to AcCoA ligand and RIN4 peptide. The few non-conserved polymorphic residues that have been displayed on HopZ3 surface presumably confer intracellular recognitions within hosts. Collectively, homology modeling and interactive docking experiments were used to substantiate Arabidopsis immune 'guardee' interactions to HopZ3.
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Häffner SM, Parra-Ortiz E, Browning KL, Jørgensen E, Skoda MWA, Montis C, Li X, Berti D, Zhao D, Malmsten M. Membrane Interactions of Virus-like Mesoporous Silica Nanoparticles. ACS Nano 2021; 15:6787-6800. [PMID: 33724786 DOI: 10.1021/acsnano.0c10378] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In the present study, we investigated lipid membrane interactions of silica nanoparticles as carriers for the antimicrobial peptide LL-37 (LLGDFFRKSKEKIGKEFKRIVQRIKDFLRNLVPRTES). In doing so, smooth mesoporous nanoparticles were compared to virus-like mesoporous nanoparticles, characterized by a "spiky" external surface, as well as to nonporous silica nanoparticles. For this, we employed a combination of neutron reflectometry, ellipsometry, dynamic light scattering, and ζ-potential measurements for studies of bacteria-mimicking bilayers formed by palmitoyloleoylphosphatidylcholine/palmitoyloleoylphosphatidylglycerol. The results show that nanoparticle topography strongly influences membrane binding and destabilization. We found that virus-like particles are able to destabilize such lipid membranes, whereas the corresponding smooth silica nanoparticles are not. This effect of particle spikes becomes further accentuated after loading of such particles with LL-37. Thus, peptide-loaded virus-like nanoparticles displayed more pronounced membrane disruption than either peptide-loaded smooth nanoparticles or free LL-37. The structural basis of this was clarified by neutron reflectometry, demonstrating that the virus-like nanoparticles induce trans-membrane defects and promote incorporation of LL-37 throughout both bilayer leaflets. The relevance of such effects of particle spikes for bacterial membrane rupture was further demonstrated by confocal microscopy and live/dead assays on Escherichia coli bacteria. Taken together, these findings demonstrate that topography influences the interaction of nanoparticles with bacteria-mimicking lipid bilayers, both in the absence and presence of antimicrobial peptides, as well as with bacteria. The results also identify virus-like mesoporous nanoparticles as being of interest in the design of nanoparticles as delivery systems for antimicrobial peptides.
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Affiliation(s)
| | - Elisa Parra-Ortiz
- Department of Pharmacy, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Kathryn L Browning
- Department of Pharmacy, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Elin Jørgensen
- Costerton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Maximilian W A Skoda
- ISIS Pulsed Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell, Oxfordshire OX11 0QX, United Kingdom
| | - Costanza Montis
- CSGI and Department of Chemistry "Ugo Schiff″, University of Florence, IT-50019 Sesto Fiorentino, Italy
| | - Xiaomin Li
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, People's Republic of China
| | - Debora Berti
- CSGI and Department of Chemistry "Ugo Schiff″, University of Florence, IT-50019 Sesto Fiorentino, Italy
| | - Dongyuan Zhao
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, People's Republic of China
| | - Martin Malmsten
- Department of Pharmacy, University of Copenhagen, DK-2100 Copenhagen, Denmark
- Department of Physical Chemistry 1, University of Lund, SE-22100 Lund, Sweden
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Grosjean M, Tazrout S, Bour M, Triponey P, Muller C, Jeannot K, Plésiat P. Reassessment of the cooperativity between efflux system MexAB-OprM and cephalosporinase AmpC in the resistance of Pseudomonas aeruginosa to β-lactams. J Antimicrob Chemother 2021; 76:536-539. [PMID: 33201984 DOI: 10.1093/jac/dkaa462] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 10/12/2020] [Indexed: 11/14/2022] Open
Affiliation(s)
- Mélanie Grosjean
- UMR6249 CNRS Chrono-Environnement, Université Bourgogne Franche-Comté, Besançon, France
- Smaltis, 2 rue Paul Milleret, 25000 Besançon, France
| | - Sara Tazrout
- UMR6249 CNRS Chrono-Environnement, Université Bourgogne Franche-Comté, Besançon, France
| | - Maxime Bour
- Centre National de Référence de la Résistance aux Antibiotiques, Centre Hospitalier Universitaire de Besançon, Besançon, France
| | - Pauline Triponey
- Centre National de Référence de la Résistance aux Antibiotiques, Centre Hospitalier Universitaire de Besançon, Besançon, France
| | - Cédric Muller
- Smaltis, 2 rue Paul Milleret, 25000 Besançon, France
| | - Katy Jeannot
- UMR6249 CNRS Chrono-Environnement, Université Bourgogne Franche-Comté, Besançon, France
- Centre National de Référence de la Résistance aux Antibiotiques, Centre Hospitalier Universitaire de Besançon, Besançon, France
| | - Patrick Plésiat
- UMR6249 CNRS Chrono-Environnement, Université Bourgogne Franche-Comté, Besançon, France
- Centre National de Référence de la Résistance aux Antibiotiques, Centre Hospitalier Universitaire de Besançon, Besançon, France
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Kim C, Park M, Yang J, Shin J, Park YC, Kim SK, Kweon DH. Inducible plasmid display system for high-throughput selection of proteins with improved solubility. J Biotechnol 2020; 329:143-150. [PMID: 33373627 DOI: 10.1016/j.jbiotec.2020.12.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/13/2020] [Accepted: 12/16/2020] [Indexed: 12/24/2022]
Abstract
Soluble expression of enzymes inside the cell is a prerequisite for the successful biotransformation of valuable products. Some key enzymes involved in biotransformation processes, however, are hardly expressed in their soluble forms. Here, we propose an inducible plasmid display, which is a molecular evolution strategy coupled with a high-throughput screening and/or selection method, as a simple and powerful tool for improving the solubility of target enzymes. Specifically, the Oct-1 DNA-binding domain and intein (i.e., auto-processing domain) were employed as anchoring and protein trans-splicing motifs to develop the system, in which the probability of protein trans-splicing is dependent on the soluble property of target proteins. The applicability of inducible plasmid display was investigated using an α-1,2-fucosyltransferase (FucT2) from Helicobacter pylori, a highly insoluble and unstable enzyme in the cytoplasmic space of Escherichia coli, as a model protein. One round of the overall inducible plasmid display process, which consists of in vivo production of FucT2 mutants and in vitro screening, enabled soluble expression of FucT2 and selection of plasmids containing the corresponding genetic information. The inducible plasmid display developed in this study will contribute to the rapid and efficient screening and/or selection of soluble proteins.
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Affiliation(s)
- Chakhee Kim
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Seoburo 2066, Suwon, Gyeonggi, 16419, Republic of Korea
| | - Myungseo Park
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Seoburo 2066, Suwon, Gyeonggi, 16419, Republic of Korea
| | - Jinkyeong Yang
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Seoburo 2066, Suwon, Gyeonggi, 16419, Republic of Korea
| | - Jonghyeok Shin
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Seoburo 2066, Suwon, Gyeonggi, 16419, Republic of Korea
| | - Yong-Cheol Park
- Department of Bio and Fermentation Convergence Technology, Kookmin University, Seoul, 02707, Republic of Korea
| | - Sun-Ki Kim
- Department of Food Science and Technology, Chung-Ang University, Anseong, Gyeonggi, 17546, Republic of Korea.
| | - Dae-Hyuk Kweon
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Seoburo 2066, Suwon, Gyeonggi, 16419, Republic of Korea; Biomedical Institute for Convergence, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
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