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Eriksson L, Johannesen TB, Stenmark B, Jacobsson S, Säll O, Hedberg ST, Fredlund H, Stegger M, Mölling P. Genetic variants linked to the phenotypic outcome of invasive disease and carriage of Neisseria meningitidis. Microb Genom 2023; 9:001124. [PMID: 37874326 PMCID: PMC10634450 DOI: 10.1099/mgen.0.001124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 10/10/2023] [Indexed: 10/25/2023] Open
Abstract
Neisseria meningitidis can be a human commensal in the upper respiratory tract but is also capable of causing invasive diseases such as meningococcal meningitis and septicaemia. No specific genetic markers have been detected to distinguish carriage from disease isolates. The aim here was to find genetic traits that could be linked to phenotypic outcomes associated with carriage versus invasive N. meningitidis disease through a bacterial genome-wide association study (GWAS). In this study, invasive N. meningitidis isolates collected in Sweden (n=103) and carriage isolates collected at Örebro University, Sweden (n=213) 2018-2019 were analysed. The GWAS analysis, treeWAS, was applied to single-nucleotide polymorphisms (SNPs), genes and k-mers. One gene and one non-synonymous SNP were associated with invasive disease and seven genes and one non-synonymous SNP were associated with carriage isolates. The gene associated with invasive disease encodes a phage transposase (NEIS1048), and the associated invasive SNP glmU S373C encodes the enzyme N-acetylglucosamine 1-phosphate (GlcNAC 1-P) uridyltransferase. Of the genes associated with carriage isolates, a gene variant of porB encoding PorB class 3, the genes pilE/pilS and tspB have known functions. The SNP associated with carriage was fkbp D33N, encoding a FK506-binding protein (FKBP). K-mers from PilS, tbpB and tspB were found to be associated with carriage, while k-mers from mtrD and tbpA were associated with invasiveness. In the genes fkbp, glmU, PilC and pilE, k-mers were found that were associated with both carriage and invasive isolates, indicating that specific variations within these genes could play a role in invasiveness. The data presented here highlight genetic traits that are significantly associated with invasive or carriage N. meningitidis across the species population. These traits could prove essential to our understanding of the pathogenicity of N. meningitidis and could help to identify future vaccine targets.
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Affiliation(s)
- Lorraine Eriksson
- Department of Laboratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Thor Bech Johannesen
- Department of Bacteria, Parasites and Fungi, Statens Serum Institut, Copenhagen, Denmark
| | - Bianca Stenmark
- Department of Laboratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Susanne Jacobsson
- Department of Laboratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Olof Säll
- Department of Infectious Diseases, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Sara Thulin Hedberg
- Department of Laboratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Hans Fredlund
- Department of Laboratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Marc Stegger
- Department of Laboratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- Department of Bacteria, Parasites and Fungi, Statens Serum Institut, Copenhagen, Denmark
| | - Paula Mölling
- Department of Laboratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
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Ait Djebbara S, Mcheik S, Percier P, Segueni N, Poncelet A, Truyens C. The macrophage infectivity potentiator of Trypanosoma cruzi induces innate IFN-γ and TNF-α production by human neonatal and adult blood cells through TLR2/1 and TLR4. Front Immunol 2023; 14:1180900. [PMID: 37304288 PMCID: PMC10250606 DOI: 10.3389/fimmu.2023.1180900] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 05/10/2023] [Indexed: 06/13/2023] Open
Abstract
We previously identified the recombinant (r) macrophage (M) infectivity (I) potentiator (P) of the protozoan parasite Trypanosoma cruzi (Tc) (rTcMIP) as an immuno-stimulatory protein that induces the release of IFN-γ, CCL2 and CCL3 by human cord blood cells. These cytokines and chemokines are important to direct a type 1 adaptive immune response. rTcMIP also increased the Ab response and favored the production of the Th1-related isotype IgG2a in mouse models of neonatal vaccination, indicating that rTcMIP could be used as a vaccine adjuvant to enhance T and B cell responses. In the present study, we used cord and adult blood cells, and isolated NK cells and human monocytes to investigate the pathways and to decipher the mechanism of action of the recombinant rTcMIP. We found that rTcMIP engaged TLR1/2 and TLR4 independently of CD14 and activated the MyD88, but not the TRIF, pathway to induce IFN-γ production by IL-15-primed NK cells, and TNF-α secretion by monocytes and myeloid dendritic cells. Our results also indicated that TNF-α boosted IFN-γ expression. Though cord blood cells displayed lower responses than adult cells, our results allow to consider rTcMIP as a potential pro-type 1 adjuvant that might be associated to vaccines administered in early life or later.
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Affiliation(s)
- Sarra Ait Djebbara
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Saria Mcheik
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Pauline Percier
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
- Service Immune Response, Sciensano, Brussels, Belgium
| | - Noria Segueni
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Antoine Poncelet
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Carine Truyens
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
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3
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Yadav P, Singh R, Sur S, Bansal S, Chaudhry U, Tandon V. Moonlighting proteins: beacon of hope in era of drug resistance in bacteria. Crit Rev Microbiol 2023; 49:57-81. [PMID: 35220864 DOI: 10.1080/1040841x.2022.2036695] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Moonlighting proteins (MLPs) are ubiquitous and provide a unique advantage to bacteria performing multiple functions using the same genomic content. Targeting MLPs can be considered as a futuristic approach in fighting drug resistance problem. This review follows the MLP trail from its inception to the present-day state, describing a few bacterial MLPs, viz., glyceraldehyde 3'-phosphate dehydrogenase, phosphoglucose isomerase glutamate racemase (GR), and DNA gyrase. Here, we carve out that targeting MLPs are the beacon of hope in an era of increasing drug resistance in bacteria. Evolutionary stability, structure-functional relationships, protein diversity, possible drug targets, and identification of new drugs against bacterial MLP are given due consideration. Before the final curtain calls, we provide a comprehensive list of small molecules that inhibit the biochemical activity of MLPs, which can aid the development of novel molecules to target MLPs for therapeutic applications.
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Affiliation(s)
- Pramod Yadav
- Special Center for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India.,Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, New Delhi, India
| | - Raja Singh
- Special Center for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
| | - Souvik Sur
- Research and Development Center, Teerthanker Mahaveer University, Uttar Pradesh, India
| | - Sandhya Bansal
- Norton Thoracic Institute, St. Joseph's Hospital, and Medical Center, Phoenix, AZ, USA
| | - Uma Chaudhry
- Bhaskaracharya College of Applied Sciences, University of Delhi, New Delhi, India
| | - Vibha Tandon
- Special Center for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India
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4
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Radwanska M, de Lemos Esteves F, Linsen L, Coltel N, Cencig S, Widart J, Massart AC, Colson S, Di Paolo A, Percier P, Ait Djebbara S, Guillonneau F, Flamand V, De Pauw E, Frère JM, Carlier Y, Truyens C. Macrophage-infectivity potentiator of Trypanosoma cruzi (TcMIP) is a new pro-type 1 immuno-stimulating protein for neonatal human cells and vaccines in mice. Front Immunol 2023; 14:1138526. [PMID: 37033946 PMCID: PMC10077492 DOI: 10.3389/fimmu.2023.1138526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 02/27/2023] [Indexed: 04/11/2023] Open
Abstract
This work identifies the protein "macrophage infectivity potentiator" of Trypanosoma cruzi trypomastigotes, as supporting a new property, namely a pro-type 1 immunostimulatory activity on neonatal cells. In its recombinant form (rTcMIP), this protein triggers the secretion of the chemokines CCL2 and CCL3 by human umbilical cord blood cells from healthy newborns, after 24h in vitro culture. Further stimulation for 72h results in secretion of IFN-γ, provided cultures are supplemented with IL-2 and IL-18. rTcMIP activity is totally abolished by protease treatment and is not associated with its peptidyl-prolyl cis-trans isomerase enzymatic activity. The ability of rTcMIP to act as adjuvant was studied in vivo in neonatal mouse immunization models, using acellular diphtheria-tetanus-pertussis-vaccine (DTPa) or ovalbumin, and compared to the classical alum adjuvant. As compared to the latter, rTcMIP increases the IgG antibody response towards several antigens meanwhile skewing antibody production towards the Th-1 dependent IgG2a isotype. The amplitude of the rTcMIP adjuvant effect varied depending on the antigen and the co-presence of alum. rTcMIP did by contrast not increase the IgE response to OVA combined with alum. The discovery of the rTcMIP immunostimulatory effect on neonatal cells opens new possibilities for potential use as pro-type 1 adjuvant for neonatal vaccines. This, in turn, may facilitate the development of more efficient vaccines that can be given at birth, reducing infection associated morbidity and mortality which are the highest in the first weeks after birth.
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Affiliation(s)
- Magdalena Radwanska
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | | | - Loes Linsen
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Nicolas Coltel
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Sabrina Cencig
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Joelle Widart
- Laboratory of Mass Spectrometry (LSM), Department of Chemistry, Université de Liège, Liège, Belgium
| | - Anne-Cécile Massart
- Laboratory of Mass Spectrometry (LSM), Department of Chemistry, Université de Liège, Liège, Belgium
| | - Séverine Colson
- Center for Protein Engineering (CIP), Université de Liège (ULg), Liège, Belgium
| | - Alexandre Di Paolo
- Center for Protein Engineering (CIP), Université de Liège (ULg), Liège, Belgium
| | - Pauline Percier
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Sarra Ait Djebbara
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - François Guillonneau
- Laboratory of Mass Spectrometry (LSM), Department of Chemistry, Université de Liège, Liège, Belgium
| | - Véronique Flamand
- Institute for Medical Immunology (IMI), and ULB Center for Research in Immunology (U-CRI), Gosselies, Belgium
| | - Edwin De Pauw
- Laboratory of Mass Spectrometry (LSM), Department of Chemistry, Université de Liège, Liège, Belgium
| | - Jean-Marie Frère
- Center for Protein Engineering (CIP), Université de Liège (ULg), Liège, Belgium
| | - Yves Carlier
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, Tulane University, New Orleans, MA, United States
| | - Carine Truyens
- Laboratory of Parasitology, Faculty of Medicine, and ULB Center for Research in Immunology (UCRI), Université Libre de Bruxelles (ULB), Brussels, Belgium
- *Correspondence: Carine Truyens,
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An in silico reverse vaccinology study of Brachyspira pilosicoli, the causative organism of intestinal spirochaetosis, to identify putative vaccine candidates. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.08.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Naorem RS, Pangabam BD, Bora SS, Goswami G, Barooah M, Hazarika DJ, Fekete C. Identification of Putative Vaccine and Drug Targets against the Methicillin-Resistant Staphylococcus aureus by Reverse Vaccinology and Subtractive Genomics Approaches. Molecules 2022; 27:2083. [PMID: 35408485 PMCID: PMC9000511 DOI: 10.3390/molecules27072083] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 01/23/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is an opportunistic pathogen and responsible for causing life-threatening infections. The emergence of hypervirulent and multidrug-resistant (MDR) S. aureus strains led to challenging issues in antibiotic therapy. Consequently, the morbidity and mortality rates caused by S. aureus infections have a substantial impact on health concerns. The current worldwide prevalence of MRSA infections highlights the need for long-lasting preventive measures and strategies. Unfortunately, effective measures are limited. In this study, we focus on the identification of vaccine candidates and drug target proteins against the 16 strains of MRSA using reverse vaccinology and subtractive genomics approaches. Using the reverse vaccinology approach, 4 putative antigenic proteins were identified; among these, PrsA and EssA proteins were found to be more promising vaccine candidates. We applied a molecular docking approach of selected 8 drug target proteins with the drug-like molecules, revealing that the ZINC4235426 as potential drug molecule with favorable interactions with the target active site residues of 5 drug target proteins viz., biotin protein ligase, HPr kinase/phosphorylase, thymidylate kinase, UDP-N-acetylmuramoyl-L-alanyl-D-glutamate-L-lysine ligase, and pantothenate synthetase. Thus, the identified proteins can be used for further rational drug or vaccine design to identify novel therapeutic agents for the treatment of multidrug-resistant staphylococcal infection.
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Affiliation(s)
- Romen Singh Naorem
- Department of General and Environmental Microbiology, Institute of Biology and Sport Biology, University of Pécs, Ifusag utja. 6, 7624 Pecs, Hungary; (R.S.N.); (B.D.P.)
- Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat 785013, India; (M.B.); (D.J.H.)
| | - Bandana Devi Pangabam
- Department of General and Environmental Microbiology, Institute of Biology and Sport Biology, University of Pécs, Ifusag utja. 6, 7624 Pecs, Hungary; (R.S.N.); (B.D.P.)
| | - Sudipta Sankar Bora
- DBT—North East Centre for Agricultural Biotechnology (DBT-AAU Center), Assam Agricultural University, Jorhat 785013, India;
| | - Gunajit Goswami
- Multidisciplinary Research Unit, Jorhat Medical College and Hospital, Jorhat 785008, India;
| | - Madhumita Barooah
- Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat 785013, India; (M.B.); (D.J.H.)
- DBT—North East Centre for Agricultural Biotechnology (DBT-AAU Center), Assam Agricultural University, Jorhat 785013, India;
| | - Dibya Jyoti Hazarika
- Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat 785013, India; (M.B.); (D.J.H.)
| | - Csaba Fekete
- Department of General and Environmental Microbiology, Institute of Biology and Sport Biology, University of Pécs, Ifusag utja. 6, 7624 Pecs, Hungary; (R.S.N.); (B.D.P.)
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7
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Christodoulides M. Update on the Neisseria Macrophage Infectivity Potentiator-Like PPIase Protein. Front Cell Infect Microbiol 2022; 12:861489. [PMID: 35392612 PMCID: PMC8981591 DOI: 10.3389/fcimb.2022.861489] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 02/07/2022] [Indexed: 11/16/2022] Open
Abstract
Neisseria pathogens express a Macrophage Infectivity Potentiator Protein (MIP), which belongs to the FK506 binding protein (FKBP) family of proteins that exhibit peptidyl-prolyl cis/trans isomerase (PPIase) activity. Neisseria MIP proteins are potential candidates for inclusion into vaccines for gonorrhoea caused by N. gonorrhoeae infection, and meningitis/sepsis caused by M. meningitidis infection. Neisseria MIP proteins are also potential targets for directed drug treatments, although this remains relatively unexplored. In this mini-review, we provide an update into the vaccine potential of Neisseria MIP and the few published drug targeting studies, and explore further the diversity of this protein amongst both pathogenic and commensal Neisseria spp.
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Zhou P, Wu H, Chen S, Bai Q, Chen X, Chen L, Zeng X, Liu L, Chen L. MOMP and MIP DNA-loaded bacterial ghosts reduce the severity of lung lesions in mice after Chlamydia psittaci respiratory tract infection. Immunobiology 2019; 224:739-746. [DOI: 10.1016/j.imbio.2019.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 08/22/2019] [Accepted: 09/03/2019] [Indexed: 10/26/2022]
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9
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Humbert MV, Jackson A, Orr CM, Tews I, Christodoulides M. Characterization of two putative Dichelobacter nodosus footrot vaccine antigens identifies the first lysozyme inhibitor in the genus. Sci Rep 2019; 9:10055. [PMID: 31296905 PMCID: PMC6624275 DOI: 10.1038/s41598-019-46506-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 06/24/2019] [Indexed: 12/17/2022] Open
Abstract
The Gram-negative anaerobic bacterium Dichelobacter nodosus (Dn) causes footrot in ruminants, a debilitating and highly contagious disease that results in necrotic hooves and significant economic losses in agriculture. Vaccination with crude whole-cell vaccine mixed with multiple recombinant fimbrial proteins can provide protection during species-specific outbreaks, but subunit vaccines containing broadly cross-protective antigens are desirable. We have investigated two D. nodosus candidate vaccine antigens. Macrophage Infectivity Potentiator Dn-MIP (DNO_0012, DNO_RS00050) and Adhesin Complex Protein Dn-ACP (DNO_0725, DNO_RS06795) are highly conserved amongst ~170 D. nodosus isolates in the https://pubmlst.org/dnodosus/ database. We describe the presence of two homologous ACP domains in Dn-ACP with potent C-type lysozyme inhibitor function, and homology of Dn-MIP to other putative cell-surface and membrane-anchored MIP virulence factors. Immunization of mice with recombinant proteins with a variety of adjuvants induced antibodies that recognised both proteins in D. nodosus. Notably, immunization with fimbrial-whole-cell Footvax vaccine induced anti-Dn-ACP and anti-Dn-MIP antibodies. Although all adjuvants induced high titre antibody responses, only antisera to rDn-ACP-QuilA and rDn-ACP-Al(OH)3 significantly prevented rDn-ACP protein from inhibiting lysozyme activity in vitro. Therefore, a vaccine incorporating rDn-ACP in particular could contribute to protection by enabling normal innate immune lysozyme function to aid bacterial clearance.
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Affiliation(s)
- Maria Victoria Humbert
- Neisseria Research Group, Molecular Microbiology, Academic Unit of Clinical and Experimental Sciences, Sir Henry Wellcome Laboratories, University of Southampton Faculty of Medicine, Southampton, United Kingdom
| | - Alexandra Jackson
- Neisseria Research Group, Molecular Microbiology, Academic Unit of Clinical and Experimental Sciences, Sir Henry Wellcome Laboratories, University of Southampton Faculty of Medicine, Southampton, United Kingdom
| | - Christian M Orr
- Beamline I23, Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire, United Kingdom
| | - Ivo Tews
- Biological Sciences, Institute for Life Sciences, B85 Highfield Campus, University of Southampton, Southampton, United Kingdom
| | - Myron Christodoulides
- Neisseria Research Group, Molecular Microbiology, Academic Unit of Clinical and Experimental Sciences, Sir Henry Wellcome Laboratories, University of Southampton Faculty of Medicine, Southampton, United Kingdom.
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Jiang X, Yang Y, Zhou J, Liu H, Liao X, Luo J, Li X, Fang W. Peptidyl isomerase PrsA is surface-associated onStreptococcus suisand offers cross-protection against serotype 9 strain. FEMS Microbiol Lett 2019; 366:5281431. [DOI: 10.1093/femsle/fnz002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 01/06/2019] [Indexed: 12/27/2022] Open
Affiliation(s)
- Xiaowu Jiang
- College of Animal Sciences of Zhejiang Unversity and Key Laboratory of Preventive Veterinary Medicine of Zhejiang Province, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
- Ningbo International Travel Healthcare Center, 336 Liuting Road, Ningbo 315012, Zhejiang, China
| | - Yunkai Yang
- College of Animal Sciences of Zhejiang Unversity and Key Laboratory of Preventive Veterinary Medicine of Zhejiang Province, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Jingjing Zhou
- College of Animal Sciences of Zhejiang Unversity and Key Laboratory of Preventive Veterinary Medicine of Zhejiang Province, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Hanze Liu
- College of Animal Sciences of Zhejiang Unversity and Key Laboratory of Preventive Veterinary Medicine of Zhejiang Province, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Xiayi Liao
- College of Animal Sciences of Zhejiang Unversity and Key Laboratory of Preventive Veterinary Medicine of Zhejiang Province, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Jie Luo
- Ningbo International Travel Healthcare Center, 336 Liuting Road, Ningbo 315012, Zhejiang, China
| | - Xiaoliang Li
- College of Animal Sciences of Zhejiang Unversity and Key Laboratory of Preventive Veterinary Medicine of Zhejiang Province, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Weihuan Fang
- College of Animal Sciences of Zhejiang Unversity and Key Laboratory of Preventive Veterinary Medicine of Zhejiang Province, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
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11
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Wei X, Zhu D, Feng C, Chen G, Mao X, Wang Q, Wang J, Liu C. Inhibition of peptidyl-prolyl cis-trans isomerase B mediates cyclosporin A-induced apoptosis of islet β cells. Exp Ther Med 2018; 16:3959-3964. [PMID: 30344674 PMCID: PMC6176207 DOI: 10.3892/etm.2018.6706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 08/29/2018] [Indexed: 12/21/2022] Open
Abstract
Cyclosporin A (CsA) is widely used as an immunosuppressor in the context of organ transplantation or autoimmune disorders. Recent studies have revealed the detrimental effects of CsA on insulin resistance and pancreatic β cell failure; however, the molecular mechanisms are unknown. The present study sought to confirm the associations between CsA and β cell failure, and to investigate the roles of proinsulin folding and endoplasmic reticulum (ER) stress in CsA-induced β cell failure. The viability of MIN6 cells treated with CsA was evaluated with MTT assay. Expression levels of insulin, peptidyl-prolyl cis-trans isomerase B (PPIB), cleaved caspase-3, phospho-protein kinase R (PKR)-like endoplasmic reticulum kinase (p-PERK), PKR-like endoplasmic reticulum kinase (PERK), binding immunoglobulin protein (BIP), and C/EBP homologous protein (CHOP) were detected via reducing western blot assay. Non-reducing western blot analysis was performed to examine the expression of misfolded proinsulin peptides. The proliferation of MIN6 cells was not inhibited by CsA at concentrations <1 µmol/l. CsA treatment resulted in the decreased expression of insulin and PPIB; however, it also increased the phosphorylation of PERK, and upregulated the expression of PERK, BIP, CHOP and cleaved caspase-3. The results indicated that CsA could induce pancreatic β cell dysfunction and the potential mechanism underlying this phenomenon may be PPIB-associated proinsulin misfolding, which in turn induces ER stress in β cells.
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Affiliation(s)
- Xiao Wei
- Department of Endocrinology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210028, P.R. China
| | - Dan Zhu
- Department of Endocrinology, Jiangdu People's Hospital of Yangzhou, Yangzhou, Jiangsu 225200, P.R. China
| | - Chenchen Feng
- Central Laboratory, Jiangsu Province Blood Center, Nanjing, Jiangsu 210042, P.R. China
| | - Guofang Chen
- Department of Endocrinology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210028, P.R. China
| | - Xiaodong Mao
- Department of Endocrinology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210028, P.R. China
| | - Qifeng Wang
- Department of Endocrinology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210028, P.R. China
| | - Jie Wang
- Department of Endocrinology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210028, P.R. China
| | - Chao Liu
- Department of Endocrinology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210028, P.R. China
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12
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Immunization with recombinant truncated Neisseria meningitidis-Macrophage Infectivity Potentiator (rT-Nm-MIP) protein induces murine antibodies that are cross-reactive and bactericidal for Neisseria gonorrhoeae. Vaccine 2018; 36:3926-3936. [PMID: 29803329 PMCID: PMC6018565 DOI: 10.1016/j.vaccine.2018.05.069] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/14/2018] [Accepted: 05/16/2018] [Indexed: 02/07/2023]
Abstract
Antigenicity of rT-N. meningitidis-MIP vaccine batches is reproducible in mice. Antibodies to rT-Nm-MIP cross-react with surface Ng-MIP and adhere to gonococci. Antisera to rT-Nm-MIP are cross-bactericidal for gonococci. Meningococcal OM can be engineered to express T-Nm-MIP.
Neisseria meningitidis (Nm) and N. gonorrhoeae (Ng) express a Macrophage Infectivity Potentiator (MIP, NMB1567/NEIS1487) protein in their outer membrane (OM). In this study, we prepared independent batches of liposomes (n = 3) and liposomes + MonoPhosphoryl Lipid A (MPLA) (n = 3) containing recombinant truncated Nm-MIP protein encoded by Allele 2 (rT-Nm-MIP, amino acids 22–142), and used these to immunize mice. We tested the hypothesis that independent vaccine batches showed similar antigenicity, and that antisera could recognise both meningococcal and gonococcal MIP and induce cross-species bactericidal activity. The different batches of M2 rT-Nm-MIP-liposomes ± MPLA showed no significant (P > 0.05) batch-to-batch variation in antigenicity. Anti-rT-Nm-MIP sera reacted equally and specifically with Nm-MIP and Ng-MIP in OM and on live bacterial cell surfaces. Specificity was shown by no antiserum reactivity with Δmip bacteria. Using human complement/serum bactericidal assays, anti-M2 rT-Nm-MIP sera killed homologous meningococcal serogroup B (MenB) strains (median titres of 32–64 for anti-rT-Nm-MIP-liposome sera; 128–256 for anti-rT-Nm-MIP-liposome + MPLA sera) and heterologous M1 protein-expressing MenB strains (titres of 64 for anti rT-Nm-MIP-liposome sera; 128–256 for anti-rT-Nm-MIP-liposome + MPLA sera). Low-level killing (P < 0.05) was observed for a MenB isolate expressing M7 protein (titres 4–8), but MenB strains expressing M6 protein were not killed (titre < 4–8). Killing (P < 0.05) was observed against MenC and MenW bacteria expressing homologous M2 protein (titres of 8–16) but not against MenA or MenY bacteria (titres < 4–8). Antisera to M2 rT-Nm-MIP showed significant (P < 0.05) cross-bactericidal activity against gonococcal strain P9-17 (expressing M35 Ng-MIP, titres of 64–512) and strain 12CFX_T_003 (expressing M10 Ng-MIP, titres 8–16) but not against FA1090 (expressing M8 Ng-MIP). As an alternative to producing recombinant protein, we engineered successfully the Nm-OM to express M2 Truncated–Nm-MIP, but lipooligosaccharide-extraction with Na-DOC was contra-indicated. Our data suggest that a multi-component vaccine containing a select number of Nm- and Ng-MIP type proteins would be required to provide broad coverage of both pathogens.
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Hooda Y, Shin HE, Bateman TJ, Moraes TF. Neisserial surface lipoproteins: structure, function and biogenesis. Pathog Dis 2017; 75:2966469. [PMID: 28158534 DOI: 10.1093/femspd/ftx010] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 01/29/2017] [Indexed: 11/14/2022] Open
Abstract
The surface of many Gram-negative bacteria contains lipidated protein molecules referred to as surface lipoproteins or SLPs. SLPs play critical roles in host immune evasion, nutrient acquisition and regulation of the bacterial stress response. The focus of this review is on the SLPs present in Neisseria, a genus of bacteria that colonise the mucosal surfaces of animals. Neisseria contains two pathogens of medical interest, namely Neisseria meningitidis and N. gonorrhoeae. Several SLPs have been identified in Neisseria and their study has elucidated key strategies used by these pathogens to survive inside the human body. Herein, we focus on the identification, structure and function of SLPs that have been identified in Neisseria. We also survey the translocation pathways used by these SLPs to reach the cell surface. Specifically, we elaborate on the strategies used by neisserial SLPs to translocate across the outer membrane with an emphasis on Slam, a novel outer membrane protein that has been implicated in SLP biogenesis. Taken together, the study of SLPs in Neisseria illustrates the widespread roles played by this family of proteins in Gram-negative bacteria.
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Vaccine Potential and Diversity of the Putative Cell Binding Factor (CBF, NMB0345/NEIS1825) Protein of Neisseria meningitidis. PLoS One 2016; 11:e0160403. [PMID: 27505005 PMCID: PMC4978444 DOI: 10.1371/journal.pone.0160403] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 07/19/2016] [Indexed: 01/01/2023] Open
Abstract
The cbf gene from Neisseria meningitidis strain MC58 encoding the putative Cell Binding Factor (CBF, NMB0345/NEIS1825) protein was cloned into the pRSETA system and a ~36-kDa recombinant (r)CBF protein expressed in Escherichia coli and purified by metal affinity chromatography. High titres of rCBF antibodies were induced in mice following immunization with rCBF-saline, rCBF-Al(OH)3, rCBF-Liposomes or rCBF-Zwittergent (Zw) 3-14 micelles, both with and without incorporated monophosphoryl lipid A (MPLA) adjuvant. Anti-rCBF sera reacted in western blots of meningococcal lysates with a single protein band of molecular mass ~29.5 kDa, indicative of mature CBF protein, but did not react with a lysate of a Δnmb0345 mutant (CBF-), demonstrating specificity of the murine immune responses. CBF protein was produced by all strains of meningococci studied thus far and the protein was present on the surface of MC58 (CBF+) bacteria, but absent on Δnmb0345 mutant (CBF-) bacteria, as judged by FACS reactivity of anti-rCBF sera. Analysis of the NEIS1825 amino acid sequences from 6644 N. meningitidis isolates with defined Alleles in the pubmlst.org/Neisseria database showed that there were 141 ST types represented and there were 136 different allelic loci encoding 49 non-redundant protein sequences. Only 6/6644 (<0.1%) of N. meningitidis isolates lacked the nmb0345 gene. Amongst serogroup B isolates worldwide, ~68% and ~20% expressed CBF encoded by Allele 1 and 18 respectively, with the proteins sharing >99% amino acid identity. Murine antisera to rCBF in Zw 3-14 micelles + MPLA induced significant serum bactericidal activity (SBA) against homologous Allele 1 and heterologous Allele 18 strains, using both baby rabbit serum complement and human serum complement (h)SBA assays, but did not kill strains expressing heterologous protein encoded by Alelle 2 or 3. Furthermore, variable bactericidal activity was induced by murine antisera against different meningococcal strains in the hSBA assay, which may correlate with variable surface exposure of CBF. Regardless, the attributes of amino acid sequence conservation and protein expression amongst different strains and the ability to induce cross-strain bactericidal antibodies indicates that rCBF could be a potential meningococcal vaccine antigen and merits further testing.
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Reimer A, Seufert F, Weiwad M, Ebert J, Bzdyl NM, Kahler CM, Sarkar-Tyson M, Holzgrabe U, Rudel T, Kozjak-Pavlovic V. Inhibitors of macrophage infectivity potentiator-like PPIases affect neisserial and chlamydial pathogenicity. Int J Antimicrob Agents 2016; 48:401-8. [PMID: 27516227 DOI: 10.1016/j.ijantimicag.2016.06.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 06/16/2016] [Accepted: 06/18/2016] [Indexed: 10/21/2022]
Abstract
The pathogenic bacteria Chlamydia trachomatis, Neisseria gonorrhoeae and Neisseria meningitidis express the surface-exposed macrophage infectivity potentiator (MIP)-like protein, which plays a role in their pathogenicity. MIP exhibits a peptidyl-prolyl isomerase (PPIase) activity that is inhibited by rapamycin and FK506. In this study, pipecolic acid derivatives were tested for their activity against the chlamydial and neisserial MIP. Two MIP inhibitors were identified, PipN3 and PipN4, that affected the developmental cycle of C. trachomatis in HeLa cells. Furthermore, we could show that deletion of neisserial MIP or addition of the two MIP inhibitors affected the survival of N. gonorrhoeae in the presence of neutrophils. Furthermore, both compounds inhibited the adherence, invasion and/or survival of N. meningitidis in epithelial cells. These results confirm the importance of MIP-like proteins in infection and indicate the relevance of pipecolic acid derivatives as antimicrobials against C. trachomatis, N. gonorrhoeae and N. meningitidis.
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Affiliation(s)
- Anastasija Reimer
- Biocenter, Chair of Microbiology, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Florian Seufert
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Matthias Weiwad
- Department of Enzymology, Institute of Biochemistry and Biotechnology, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Jutta Ebert
- Biocenter, Chair of Microbiology, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Nicole M Bzdyl
- Marshall Center for Infectious Disease Research and Training, School of Pathology and Laboratory Medicine, University of Western Australia, Perth, WA, Australia
| | - Charlene M Kahler
- Marshall Center for Infectious Disease Research and Training, School of Pathology and Laboratory Medicine, University of Western Australia, Perth, WA, Australia
| | - Mitali Sarkar-Tyson
- Marshall Center for Infectious Disease Research and Training, School of Pathology and Laboratory Medicine, University of Western Australia, Perth, WA, Australia; Defence Science and Technology Laboratory, Biomedical Sciences, Porton Down, Salisbury, Wiltshire SP4 0JQ, UK
| | - Ulrike Holzgrabe
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Thomas Rudel
- Biocenter, Chair of Microbiology, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Vera Kozjak-Pavlovic
- Biocenter, Chair of Microbiology, University of Würzburg, Am Hubland, 97074 Würzburg, Germany.
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