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Beidler I, Steinke N, Schulze T, Sidhu C, Bartosik D, Zühlke MK, Martin LT, Krull J, Dutschei T, Ferrero-Bordera B, Rielicke J, Kale V, Sura T, Trautwein-Schult A, Kirstein IV, Wiltshire KH, Teeling H, Becher D, Bengtsson MM, Hehemann JH, Bornscheuer UT, Amann RI, Schweder T. Alpha-glucans from bacterial necromass indicate an intra-population loop within the marine carbon cycle. Nat Commun 2024; 15:4048. [PMID: 38744821 PMCID: PMC11093988 DOI: 10.1038/s41467-024-48301-5] [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: 08/03/2023] [Accepted: 04/24/2024] [Indexed: 05/16/2024] Open
Abstract
Phytoplankton blooms provoke bacterioplankton blooms, from which bacterial biomass (necromass) is released via increased zooplankton grazing and viral lysis. While bacterial consumption of algal biomass during blooms is well-studied, little is known about the concurrent recycling of these substantial amounts of bacterial necromass. We demonstrate that bacterial biomass, such as bacterial alpha-glucan storage polysaccharides, generated from the consumption of algal organic matter, is reused and thus itself a major bacterial carbon source in vitro and during a diatom-dominated bloom. We highlight conserved enzymes and binding proteins of dominant bloom-responder clades that are presumably involved in the recycling of bacterial alpha-glucan by members of the bacterial community. We furthermore demonstrate that the corresponding protein machineries can be specifically induced by extracted alpha-glucan-rich bacterial polysaccharide extracts. This recycling of bacterial necromass likely constitutes a large-scale intra-population energy conservation mechanism that keeps substantial amounts of carbon in a dedicated part of the microbial loop.
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Affiliation(s)
- Irena Beidler
- Pharmaceutical Biotechnology, Institute of Pharmacy, University of Greifswald, 17489, Greifswald, Germany
| | - Nicola Steinke
- Max Planck Institute for Marine Microbiology, 28359, Bremen, Germany
- University of Bremen, Center for Marine Environmental Sciences, MARUM, 28359, Bremen, Germany
| | - Tim Schulze
- Pharmaceutical Biotechnology, Institute of Pharmacy, University of Greifswald, 17489, Greifswald, Germany
| | - Chandni Sidhu
- Max Planck Institute for Marine Microbiology, 28359, Bremen, Germany
| | - Daniel Bartosik
- Pharmaceutical Biotechnology, Institute of Pharmacy, University of Greifswald, 17489, Greifswald, Germany
- Institute of Marine Biotechnology, 17489, Greifswald, Germany
| | - Marie-Katherin Zühlke
- Pharmaceutical Biotechnology, Institute of Pharmacy, University of Greifswald, 17489, Greifswald, Germany
| | - Laura Torres Martin
- Pharmaceutical Biotechnology, Institute of Pharmacy, University of Greifswald, 17489, Greifswald, Germany
| | - Joris Krull
- Pharmaceutical Biotechnology, Institute of Pharmacy, University of Greifswald, 17489, Greifswald, Germany
- Max Planck Institute for Marine Microbiology, 28359, Bremen, Germany
| | - Theresa Dutschei
- Biotechnology and Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, 17489, Greifswald, Germany
| | - Borja Ferrero-Bordera
- Microbial Proteomics, Institute of Microbiology, University of Greifswald, 17489, Greifswald, Germany
| | - Julia Rielicke
- Microbial Proteomics, Institute of Microbiology, University of Greifswald, 17489, Greifswald, Germany
| | - Vaikhari Kale
- Microbial Proteomics, Institute of Microbiology, University of Greifswald, 17489, Greifswald, Germany
| | - Thomas Sura
- Microbial Proteomics, Institute of Microbiology, University of Greifswald, 17489, Greifswald, Germany
| | - Anke Trautwein-Schult
- Microbial Proteomics, Institute of Microbiology, University of Greifswald, 17489, Greifswald, Germany
| | - Inga V Kirstein
- Alfred Wegener Institute for Polar and Marine Research, Biologische Anstalt Helgoland, 27483, Helgoland, Germany
| | - Karen H Wiltshire
- Alfred Wegener Institute for Polar and Marine Research, Biologische Anstalt Helgoland, 27483, Helgoland, Germany
| | - Hanno Teeling
- Max Planck Institute for Marine Microbiology, 28359, Bremen, Germany
| | - Dörte Becher
- Microbial Proteomics, Institute of Microbiology, University of Greifswald, 17489, Greifswald, Germany
| | - Mia Maria Bengtsson
- Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, 17489, Greifswald, Germany
| | - Jan-Hendrik Hehemann
- Max Planck Institute for Marine Microbiology, 28359, Bremen, Germany
- University of Bremen, Center for Marine Environmental Sciences, MARUM, 28359, Bremen, Germany
| | - Uwe T Bornscheuer
- Biotechnology and Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, 17489, Greifswald, Germany
| | - Rudolf I Amann
- Max Planck Institute for Marine Microbiology, 28359, Bremen, Germany
| | - Thomas Schweder
- Pharmaceutical Biotechnology, Institute of Pharmacy, University of Greifswald, 17489, Greifswald, Germany.
- Institute of Marine Biotechnology, 17489, Greifswald, Germany.
- Alfred Wegener Institute for Polar and Marine Research, Biologische Anstalt Helgoland, 27483, Helgoland, Germany.
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Reder A, Hentschker C, Steil L, Gesell Salazar M, Hammer E, Dhople VM, Sura T, Lissner U, Wolfgramm H, Dittmar D, Harms M, Surmann K, Völker U, Michalik S. MassSpecPreppy-An end-to-end solution for automated protein concentration determination and flexible sample digestion for proteomics applications. Proteomics 2024; 24:e2300294. [PMID: 37772677 DOI: 10.1002/pmic.202300294] [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: 07/31/2023] [Revised: 09/13/2023] [Accepted: 09/14/2023] [Indexed: 09/30/2023]
Abstract
In proteomics, fast, efficient, and highly reproducible sample preparation is of utmost importance, particularly in view of fast scanning mass spectrometers enabling analyses of large sample series. To address this need, we have developed the web application MassSpecPreppy that operates on the open science OT-2 liquid handling robot from Opentrons. This platform can prepare up to 96 samples at once, performing tasks like BCA protein concentration determination, sample digestion with normalization, reduction/alkylation and peptide elution into vials or loading specified peptide amounts onto Evotips in an automated and flexible manner. The performance of the developed workflows using MassSpecPreppy was compared with standard manual sample preparation workflows. The BCA assay experiments revealed an average recovery of 101.3% (SD: ± 7.82%) for the MassSpecPreppy workflow, while the manual workflow had a recovery of 96.3% (SD: ± 9.73%). The species mix used in the evaluation experiments showed that 94.5% of protein groups for OT-2 digestion and 95% for manual digestion passed the significance thresholds with comparable peptide level coefficient of variations. These results demonstrate that MassSpecPreppy is a versatile and scalable platform for automated sample preparation, producing injection-ready samples for proteomics research.
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Affiliation(s)
- Alexander Reder
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Christian Hentschker
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Leif Steil
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Manuela Gesell Salazar
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Elke Hammer
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Vishnu M Dhople
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Thomas Sura
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Ulrike Lissner
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Hannes Wolfgramm
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Denise Dittmar
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Marco Harms
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Kristin Surmann
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Uwe Völker
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Stephan Michalik
- Interfaculty Institute of Genetics and Functional Genomics, Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
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Venz S, von Bohlen Und Halbach V, Hentschker C, Junker H, Kuss AW, Sura T, Krüger E, Völker U, von Bohlen Und Halbach O, Jensen LR, Hammer E. Global Protein Profiling in Processed Immunohistochemistry Tissue Sections. Int J Mol Sci 2023; 24:11308. [PMID: 37511068 PMCID: PMC10379013 DOI: 10.3390/ijms241411308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/07/2023] [Accepted: 07/08/2023] [Indexed: 07/30/2023] Open
Abstract
Tissue sections, which are widely used in research and diagnostic laboratories and have already been examined by immunohistochemistry (IHC), may subsequently provide a resource for proteomic studies, even though only small amount of protein is available. Therefore, we established a workflow for tandem mass spectrometry-based protein profiling of IHC specimens and characterized defined brain area sections. We investigated the CA1 region of the hippocampus dissected from brain slices of adult C57BL/6J mice. The workflow contains detailed information on sample preparation from brain slices, including removal of antibodies and cover matrices, dissection of region(s) of interest, protein extraction and digestion, mass spectrometry measurement, and data analysis. The Gene Ontology (GO) knowledge base was used for further annotation. Literature searches and Gene Ontology annotation of the detected proteins verify the applicability of this method for global protein profiling using formalin-fixed and embedded material and previously used IHC slides.
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Affiliation(s)
- Simone Venz
- Institute of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, 17475 Greifswald, Germany
| | | | - Christian Hentschker
- Interfaculty Institute of Genetics and Functional Genomics, University Medicine Greifswald, 17475 Greifswald, Germany
| | - Heike Junker
- Institute of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, 17475 Greifswald, Germany
| | - Andreas Walter Kuss
- Interfaculty Institute of Genetics and Functional Genomics, University Medicine Greifswald, 17475 Greifswald, Germany
| | - Thomas Sura
- Interfaculty Institute of Genetics and Functional Genomics, University Medicine Greifswald, 17475 Greifswald, Germany
| | - Elke Krüger
- Institute of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, 17475 Greifswald, Germany
| | - Uwe Völker
- Interfaculty Institute of Genetics and Functional Genomics, University Medicine Greifswald, 17475 Greifswald, Germany
| | | | - Lars Riff Jensen
- Interfaculty Institute of Genetics and Functional Genomics, University Medicine Greifswald, 17475 Greifswald, Germany
| | - Elke Hammer
- Interfaculty Institute of Genetics and Functional Genomics, University Medicine Greifswald, 17475 Greifswald, Germany
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Shumba P, Sura T, Moll K, Chakrakodi B, Tölken LA, Hoßmann J, Hoff KJ, Hyldegaard O, Nekludov M, Svensson M, Arnell P, Skrede S, Norrby-Teglund A, Siemens N. Neutrophil-derived reactive agents induce a transient SpeB negative phenotype in Streptococcus pyogenes. J Biomed Sci 2023; 30:52. [PMID: 37430325 DOI: 10.1186/s12929-023-00947-x] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 07/03/2023] [Indexed: 07/12/2023] Open
Abstract
BACKGROUND Streptococcus pyogenes (group A streptococci; GAS) is the main causative pathogen of monomicrobial necrotizing soft tissue infections (NSTIs). To resist immuno-clearance, GAS adapt their genetic information and/or phenotype to the surrounding environment. Hyper-virulent streptococcal pyrogenic exotoxin B (SpeB) negative variants caused by covRS mutations are enriched during infection. A key driving force for this process is the bacterial Sda1 DNase. METHODS Bacterial infiltration, immune cell influx, tissue necrosis and inflammation in patient´s biopsies were determined using immunohistochemistry. SpeB secretion and activity by GAS post infections or challenges with reactive agents were determined via Western blot or casein agar and proteolytic activity assays, respectively. Proteome of GAS single colonies and neutrophil secretome were profiled, using mass spectrometry. RESULTS Here, we identify another strategy resulting in SpeB-negative variants, namely reversible abrogation of SpeB secretion triggered by neutrophil effector molecules. Analysis of NSTI patient tissue biopsies revealed that tissue inflammation, neutrophil influx, and degranulation positively correlate with increasing frequency of SpeB-negative GAS clones. Using single colony proteomics, we show that GAS isolated directly from tissue express but do not secrete SpeB. Once the tissue pressure is lifted, GAS regain SpeB secreting function. Neutrophils were identified as the main immune cells responsible for the observed phenotype. Subsequent analyses identified hydrogen peroxide and hypochlorous acid as reactive agents driving this phenotypic GAS adaptation to the tissue environment. SpeB-negative GAS show improved survival within neutrophils and induce increased degranulation. CONCLUSIONS Our findings provide new information about GAS fitness and heterogeneity in the soft tissue milieu and provide new potential targets for therapeutic intervention in NSTIs.
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Affiliation(s)
- Patience Shumba
- Department of Molecular Genetics and Infection Biology, University of Greifswald, Greifswald, Germany
| | - Thomas Sura
- Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Kirsten Moll
- Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Bhavya Chakrakodi
- Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Lea A Tölken
- Department of Molecular Genetics and Infection Biology, University of Greifswald, Greifswald, Germany
| | - Jörn Hoßmann
- Helmholtz Center for Infection Research, Brunswick, Germany
| | - Katharina J Hoff
- Institute of Mathematics and Computer Science, University of Greifswald, Greifswald, Germany
| | - Ole Hyldegaard
- Department of Anaesthesia, Head and Orthopedic Center, University Hospital Copenhagen, Rigshospitalet, Copenhagen, Denmark
- Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Michael Nekludov
- Department of Anaesthesia, Surgical Services and Intensive Care, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
| | - Mattias Svensson
- Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Per Arnell
- Department of Anaesthesiology and Intensive Care Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Steinar Skrede
- Department of Medicine, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Anna Norrby-Teglund
- Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Nikolai Siemens
- Department of Molecular Genetics and Infection Biology, University of Greifswald, Greifswald, Germany.
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Hochstrasser R, Michaelis S, Brülisauer S, Sura T, Fan M, Maaß S, Becher D, Hilbi H. Migration of Acanthamoeba through Legionella biofilms is regulated by the bacterial Lqs-LvbR network, effector proteins and the flagellum. Environ Microbiol 2022; 24:3672-3692. [PMID: 35415862 PMCID: PMC9544456 DOI: 10.1111/1462-2920.16008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 04/05/2022] [Accepted: 04/08/2022] [Indexed: 11/30/2022]
Abstract
The environmental bacterium Legionella pneumophila causes the pneumonia Legionnaires' disease. The opportunistic pathogen forms biofilms and employs the Icm/Dot type IV secretion system (T4SS) to replicate in amoebae and macrophages. A regulatory network comprising the Legionella quorum sensing (Lqs) system and the transcription factor LvbR controls bacterial motility, virulence and biofilm architecture. Here we show by comparative proteomics that in biofilms formed by the L. pneumophila ΔlqsR or ΔlvbR regulatory mutants the abundance of proteins encoded by a genomic ‘fitness island’, metabolic enzymes, effector proteins and flagellar components (e.g. FlaA) varies. ∆lqsR or ∆flaA mutants form ‘patchy’ biofilms like the parental strain JR32, while ∆lvbR forms a ‘mat‐like’ biofilm. Acanthamoeba castellanii amoebae migrated more slowly through biofilms of L. pneumophila lacking lqsR, lvbR, flaA, a functional Icm/Dot T4SS (∆icmT), or secreted effector proteins. Clusters of bacteria decorated amoebae in JR32, ∆lvbR or ∆icmT biofilms but not in ∆lqsR or ∆flaA biofilms. The amoeba‐adherent bacteria induced promoters implicated in motility (PflaA) or virulence (PsidC, PralF). Taken together, the Lqs‐LvbR network (quorum sensing), FlaA (motility) and the Icm/Dot T4SS (virulence) regulate migration of A. castellanii through L. pneumophila biofilms, and – apart from the T4SS – govern bacterial cluster formation on the amoebae.
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Affiliation(s)
- Ramon Hochstrasser
- Institute of Medical Microbiology, University of Zürich, Gloriastrasse 30, 8006, Zürich, Switzerland
| | - Sarah Michaelis
- Institute of Medical Microbiology, University of Zürich, Gloriastrasse 30, 8006, Zürich, Switzerland
| | - Sabrina Brülisauer
- Institute of Medical Microbiology, University of Zürich, Gloriastrasse 30, 8006, Zürich, Switzerland
| | - Thomas Sura
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Strasse 8, 17489, Greifswald, Germany
| | - Mingzhen Fan
- Institute of Medical Microbiology, University of Zürich, Gloriastrasse 30, 8006, Zürich, Switzerland
| | - Sandra Maaß
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Strasse 8, 17489, Greifswald, Germany
| | - Dörte Becher
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Strasse 8, 17489, Greifswald, Germany
| | - Hubert Hilbi
- Institute of Medical Microbiology, University of Zürich, Gloriastrasse 30, 8006, Zürich, Switzerland
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Sura T, Gering V, Cammann C, Hammerschmidt S, Maaß S, Seifert U, Becher D. Streptococcus pneumoniae and Influenza A Virus Co-Infection Induces Altered Polyubiquitination in A549 Cells. Front Cell Infect Microbiol 2022; 12:817532. [PMID: 35281454 PMCID: PMC8908964 DOI: 10.3389/fcimb.2022.817532] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 01/25/2022] [Indexed: 11/13/2022] Open
Abstract
Epithelial cells are an important line of defense within the lung. Disruption of the epithelial barrier by pathogens enables the systemic dissemination of bacteria or viruses within the host leading to severe diseases with fatal outcomes. Thus, the lung epithelium can be damaged by seasonal and pandemic influenza A viruses. Influenza A virus infection induced dysregulation of the immune system is beneficial for the dissemination of bacteria to the lower respiratory tract, causing bacterial and viral co-infection. Host cells regulate protein homeostasis and the response to different perturbances, for instance provoked by infections, by post translational modification of proteins. Aside from protein phosphorylation, ubiquitination of proteins is an essential regulatory tool in virtually every cellular process such as protein homeostasis, host immune response, cell morphology, and in clearing of cytosolic pathogens. Here, we analyzed the proteome and ubiquitinome of A549 alveolar lung epithelial cells in response to infection by either Streptococcus pneumoniae D39Δcps or influenza A virus H1N1 as well as bacterial and viral co-infection. Pneumococcal infection induced alterations in the ubiquitination of proteins involved in the organization of the actin cytoskeleton and Rho GTPases, but had minor effects on the abundance of host proteins. H1N1 infection results in an anti-viral state of A549 cells. Finally, co-infection resembled the imprints of both infecting pathogens with a minor increase in the observed alterations in protein and ubiquitination abundance.
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Affiliation(s)
- Thomas Sura
- Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Vanessa Gering
- Friedrich Loeffler-Institute of Medical Microbiology-Virology, University Medicine Greifswald, Greifswald, Germany
| | - Clemens Cammann
- Friedrich Loeffler-Institute of Medical Microbiology-Virology, University Medicine Greifswald, Greifswald, Germany
| | - Sven Hammerschmidt
- Department of Molecular Genetics and Infection Biology, Interfaculty Institute for Genetics and Functional Genomics, University of Greifswald, Greifswald, Germany
| | - Sandra Maaß
- Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Ulrike Seifert
- Friedrich Loeffler-Institute of Medical Microbiology-Virology, University Medicine Greifswald, Greifswald, Germany
| | - Dörte Becher
- Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, Greifswald, Germany
- *Correspondence: Dörte Becher,
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Sura T, Surabhi S, Maaß S, Hammerschmidt S, Siemens N, Becher D. The global proteome and ubiquitinome of bacterial and viral co-infected bronchial epithelial cells. J Proteomics 2022; 250:104387. [PMID: 34600154 DOI: 10.1016/j.jprot.2021.104387] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/26/2021] [Accepted: 09/22/2021] [Indexed: 12/13/2022]
Abstract
Viral infections facilitate bacterial trafficking to the lower respiratory tract resulting in bacterial-viral co-infections. Bacterial dissemination to the lower respiratory tract is enhanced by influenza A virus induced epithelial cell damage and dysregulation of immune responses. Epithelial cells act as a line of defense and detect pathogens by a high variety of pattern recognition receptors. The post-translational modification ubiquitin is involved in almost every cellular process. Moreover, ubiquitination contributes to the regulation of host immune responses, influenza A virus uncoating and transport within host cells. We applied proteomics with a special focus on ubiquitination to assess the impact of single bacterial and viral as well as bacterial-viral co-infections on bronchial epithelial cells. We used Tandem Ubiquitin Binding Entities to enrich polyubiquitinated proteins and assess changes in the ubiquitinome. Infecting 16HBE cells with Streptococcus pyogenes led to an increased abundance of proteins related to mitochondrial translation and energy metabolism in proteome and ubiquitinome. In contrast, influenza A virus infection mainly altered the ubiquitinome. Co-infections had no additional impact on protein abundances or affected pathways. Changes in protein abundance and enriched pathways were assigned to imprints of both infecting pathogens. SIGNIFICANCE: Viral and bacterial co-infections of the lower respiratory tract are a burden for health systems worldwide. Therefore, it is necessary to elucidate the complex interplay between the host and the infecting pathogens. Thus, we analyzed the proteome and the ubiquitinome of co-infected bronchial epithelial cells to elaborate a potential synergism of the two infecting organisms. The results presented in this work can be used as a starting point for further analyses.
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Affiliation(s)
- Thomas Sura
- University of Greifswald, Center for Functional Genomics of Microbes, Institute of Microbiology, Department of Microbial Proteomics, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Surabhi Surabhi
- University of Greifswald, Center for Functional Genomics of Microbes, Interfaculty Institute for Genetics and Functional Genomics, Department of Molecular Genetics and Infection Biology, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Sandra Maaß
- University of Greifswald, Center for Functional Genomics of Microbes, Institute of Microbiology, Department of Microbial Proteomics, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Sven Hammerschmidt
- University of Greifswald, Center for Functional Genomics of Microbes, Interfaculty Institute for Genetics and Functional Genomics, Department of Molecular Genetics and Infection Biology, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Nikolai Siemens
- University of Greifswald, Center for Functional Genomics of Microbes, Interfaculty Institute for Genetics and Functional Genomics, Department of Molecular Genetics and Infection Biology, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Dörte Becher
- University of Greifswald, Center for Functional Genomics of Microbes, Institute of Microbiology, Department of Microbial Proteomics, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany.
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Graf AC, Striesow J, Pané-Farré J, Sura T, Wurster M, Lalk M, Pieper DH, Becher D, Kahl BC, Riedel K. An Innovative Protocol for Metaproteomic Analyses of Microbial Pathogens in Cystic Fibrosis Sputum. Front Cell Infect Microbiol 2021; 11:724569. [PMID: 34513734 PMCID: PMC8432295 DOI: 10.3389/fcimb.2021.724569] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 08/11/2021] [Indexed: 12/28/2022] Open
Abstract
Hallmarks of cystic fibrosis (CF) are increased viscosity of mucus and impaired mucociliary clearance within the airways due to mutations of the cystic fibrosis conductance regulator gene. This facilitates the colonization of the lung by microbial pathogens and the concomitant establishment of chronic infections leading to tissue damage, reduced lung function, and decreased life expectancy. Although the interplay between key CF pathogens plays a major role during disease progression, the pathophysiology of the microbial community in CF lungs remains poorly understood. Particular challenges in the analysis of the microbial population present in CF sputum is (I) the inhomogeneous, viscous, and slimy consistence of CF sputum, and (II) the high number of human proteins masking comparably low abundant microbial proteins. To address these challenges, we used 21 CF sputum samples to develop a reliable, reproducible and widely applicable protocol for sputum processing, microbial enrichment, cell disruption, protein extraction and subsequent metaproteomic analyses. As a proof of concept, we selected three sputum samples for detailed metaproteome analyses and complemented and validated metaproteome data by 16S sequencing, metabolomic as well as microscopic analyses. Applying our protocol, the number of bacterial proteins/protein groups increased from 199-425 to 392-868 in enriched samples compared to nonenriched controls. These early microbial metaproteome data suggest that the arginine deiminase pathway and multiple proteases and peptidases identified from various bacterial genera could so far be underappreciated in their contribution to the CF pathophysiology. By providing a standardized and effective protocol for sputum processing and microbial enrichment, our study represents an important basis for future studies investigating the physiology of microbial pathogens in CF in vivo – an important prerequisite for the development of novel antimicrobial therapies to combat chronic recurrent airway infection in CF.
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Affiliation(s)
- Alexander C Graf
- Institute of Microbiology, Department of Microbial Physiology & Molecular Biology, University of Greifswald, Greifswald, Germany
| | - Johanna Striesow
- Research Group ZIK Plasmatis, Leibniz Institute for Plasma Science and Technology, Greifswald, Germany
| | - Jan Pané-Farré
- Center for Synthetic Microbiology, Department of Chemistry, Philipps-University Marburg, Marburg, Germany
| | - Thomas Sura
- Institute of Microbiology, Department of Microbial Proteomics, University of Greifswald, Greifswald, Germany
| | - Martina Wurster
- Institute of Biochemistry, Department of Cellular Biochemistry & Metabolomics, University of Greifswald, Greifswald, Germany
| | - Michael Lalk
- Institute of Biochemistry, Department of Cellular Biochemistry & Metabolomics, University of Greifswald, Greifswald, Germany
| | - Dietmar H Pieper
- Research Group Microbial Interactions and Processes, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Dörte Becher
- Institute of Microbiology, Department of Microbial Proteomics, University of Greifswald, Greifswald, Germany
| | - Barbara C Kahl
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | - Katharina Riedel
- Institute of Microbiology, Department of Microbial Physiology & Molecular Biology, University of Greifswald, Greifswald, Germany
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9
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Affiliation(s)
- Jürgen Bartel
- Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, D-17489 Greifswald, Germany
| | - Adithi R. Varadarajan
- Agroscope, Research Group Molecular Diagnostics, Genomics & Bioinformatics and SIB Swiss Institute of Bioinformatics, CH-8820 Wädenswil, Switzerland
| | - Thomas Sura
- Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, D-17489 Greifswald, Germany
| | - Christian H. Ahrens
- Agroscope, Research Group Molecular Diagnostics, Genomics & Bioinformatics and SIB Swiss Institute of Bioinformatics, CH-8820 Wädenswil, Switzerland
| | - Sandra Maaß
- Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, D-17489 Greifswald, Germany
| | - Dörte Becher
- Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, D-17489 Greifswald, Germany
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10
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Antelo-Varela M, Aguilar Suárez R, Bartel J, Bernal-Cabas M, Stobernack T, Sura T, van Dijl JM, Maaß S, Becher D. Membrane Modulation of Super-Secreting "midi Bacillus" Expressing the Major Staphylococcus aureus Antigen - A Mass-Spectrometry-Based Absolute Quantification Approach. Front Bioeng Biotechnol 2020; 8:143. [PMID: 32185169 PMCID: PMC7059095 DOI: 10.3389/fbioe.2020.00143] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 02/12/2020] [Indexed: 01/18/2023] Open
Abstract
Bacillus subtilis has been extensively used as a microbial cell factory for industrial enzymes due to its excellent capacities for protein secretion and large-scale fermentation. This bacterium is also an attractive host for biopharmaceutical production. However, the secretion potential of this organism is not fully utilized yet, mostly due to a limited understanding of critical rearrangements in the membrane proteome upon high-level protein secretion. Recently, it was shown that bottlenecks in heterologous protein secretion can be resolved by genome minimization. Here, we present for the first time absolute membrane protein concentrations of a genome-reduced B. subtilis strain ("midiBacillus") expressing the immunodominant Staphylococcus aureus antigen A (IsaA). We quantitatively characterize the membrane proteome adaptation of midiBacillus during production stress on the level of molecules per cell for more than 400 membrane proteins, including determination of protein concentrations for ∼61% of the predicted transporters. We demonstrate that ∼30% of proteins with unknown functions display a significant increase in abundance, confirming the crucial role of membrane proteins in vital biological processes. In addition, our results show an increase of proteins dedicated to translational processes in response to IsaA induction. For the first time reported, we provide accumulation rates of a heterologous protein, demonstrating that midiBacillus secretes 2.41 molecules of IsaA per minute. Despite the successful secretion of this protein, it was found that there is still some IsaA accumulation occurring in the cytosol and membrane fraction, leading to a severe secretion stress response, and a clear adjustment of the cell's array of transporters. This quantitative dataset offers unprecedented insights into bioproduction stress responses in a synthetic microbial cell.
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Affiliation(s)
- Minia Antelo-Varela
- Centre of Functional Genomics of Microbes, Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Rocío Aguilar Suárez
- Department of Medical Microbiology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Jürgen Bartel
- Centre of Functional Genomics of Microbes, Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Margarita Bernal-Cabas
- Department of Medical Microbiology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Tim Stobernack
- Department of Medical Microbiology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Thomas Sura
- Centre of Functional Genomics of Microbes, Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Jan Maarten van Dijl
- Department of Medical Microbiology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Sandra Maaß
- Centre of Functional Genomics of Microbes, Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Dörte Becher
- Centre of Functional Genomics of Microbes, Department of Microbial Proteomics, Institute of Microbiology, University of Greifswald, Greifswald, Germany
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11
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Antelo-Varela M, Bartel J, Quesada-Ganuza A, Appel K, Bernal-Cabas M, Sura T, Otto A, Rasmussen M, van Dijl JM, Nielsen A, Maaß S, Becher D. Ariadne’s Thread in the Analytical Labyrinth of Membrane Proteins: Integration of Targeted and Shotgun Proteomics for Global Absolute Quantification of Membrane Proteins. Anal Chem 2019; 91:11972-11980. [DOI: 10.1021/acs.analchem.9b02869] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Minia Antelo-Varela
- Centre of Functional
Genomics of Microbes, Institute of Microbiology, Department of Microbial Proteomics, University of Greifswald, Felix-Hausdorff-Strasse 8, 17489 Greifswald, Germany
| | - Jürgen Bartel
- Centre of Functional
Genomics of Microbes, Institute of Microbiology, Department of Microbial Proteomics, University of Greifswald, Felix-Hausdorff-Strasse 8, 17489 Greifswald, Germany
| | - Ane Quesada-Ganuza
- Research & Technology, Novozymes A/S, Krogshoejvej 36, Bagsværd DK-2880, Denmark
| | - Karen Appel
- Research & Technology, Novozymes A/S, Krogshoejvej 36, Bagsværd DK-2880, Denmark
| | - Margarita Bernal-Cabas
- University Medical
Center Groningen, Department of Medical Microbiology, University of Groningen, Hanzeplein 1, P.O. Box 30001, 9700RB Groningen, The Netherlands
| | - Thomas Sura
- Centre of Functional
Genomics of Microbes, Institute of Microbiology, Department of Microbial Proteomics, University of Greifswald, Felix-Hausdorff-Strasse 8, 17489 Greifswald, Germany
| | - Andreas Otto
- Centre of Functional
Genomics of Microbes, Institute of Microbiology, Department of Microbial Proteomics, University of Greifswald, Felix-Hausdorff-Strasse 8, 17489 Greifswald, Germany
| | - Michael Rasmussen
- Research & Technology, Novozymes A/S, Krogshoejvej 36, Bagsværd DK-2880, Denmark
| | - Jan Maarten van Dijl
- University Medical
Center Groningen, Department of Medical Microbiology, University of Groningen, Hanzeplein 1, P.O. Box 30001, 9700RB Groningen, The Netherlands
| | - Allan Nielsen
- Research & Technology, Novozymes A/S, Krogshoejvej 36, Bagsværd DK-2880, Denmark
| | - Sandra Maaß
- Centre of Functional
Genomics of Microbes, Institute of Microbiology, Department of Microbial Proteomics, University of Greifswald, Felix-Hausdorff-Strasse 8, 17489 Greifswald, Germany
| | - Dörte Becher
- Centre of Functional
Genomics of Microbes, Institute of Microbiology, Department of Microbial Proteomics, University of Greifswald, Felix-Hausdorff-Strasse 8, 17489 Greifswald, Germany
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12
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Guerrero Montero I, Dolata KM, Schlüter R, Malherbe G, Sievers S, Zühlke D, Sura T, Dave E, Riedel K, Robinson C. Comparative proteome analysis in an Escherichia coli CyDisCo strain identifies stress responses related to protein production, oxidative stress and accumulation of misfolded protein. Microb Cell Fact 2019; 18:19. [PMID: 30696436 PMCID: PMC6350376 DOI: 10.1186/s12934-019-1071-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 01/23/2019] [Indexed: 01/15/2023] Open
Abstract
Background The Twin-arginine translocation (Tat) pathway of Escherichia coli has great potential for the export of biopharmaceuticals to the periplasm due to its ability to transport folded proteins, and its proofreading mechanism that allows correctly folded proteins to translocate. Coupling the Tat-dependent protein secretion with the formation of disulfide bonds in the cytoplasm of E. coli CyDisCo provides a powerful platform for the production of industrially challenging proteins. In this study, we investigated the effects on the E. coli cells of exporting a folded substrate (scFv) to the periplasm using a Tat signal peptide, and the effects of expressing an export-incompetent misfolded variant. Results Cell growth is decreased when either the correctly folded or misfolded scFv is expressed with a Tat signal peptide. However, only the production of misfolded scFv leads to cell aggregation and formation of inclusion bodies. The comprehensive proteomic analysis revealed that both conditions, recombinant protein overexpression and misfolded protein accumulation, lead to downregulation of membrane transporters responsible for protein folding and insertion into the membrane while upregulating the production of chaperones and proteases involved in removing aggregates. These conditions also differentially affect the production of transcription factors and proteins involved in DNA replication. The most distinct stress response observed was the cell aggregation caused by elevated levels of antigen 43. Finally, Tat-dependent secretion causes an increase in tatA expression only after induction of protein expression, while the subsequent post-induction analysis revealed lower tatA and tatB expression levels, which correlate with lowered TatA and TatB protein abundance. Conclusions The study identified characteristic changes occurring as a result of the production of both a folded and a misfolded protein, but also highlights an exclusive unfolded stress response. Countering and compensating for these changes may result in higher yields of pharmaceutically relevant proteins exported to the periplasm. Electronic supplementary material The online version of this article (10.1186/s12934-019-1071-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | - Katarzyna Magdalena Dolata
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Straße 8, 17487, Greifswald, Germany
| | - Rabea Schlüter
- Imaging Center of the Department of Biology, University of Greifswald, Friedrich-Ludwig-Jahn-Str. 15, 17487, Greifswald, Germany
| | - Gilles Malherbe
- School of Biosciences, University of Kent, Canterbury, CT2 7NJ, UK.,UCB Celltech, 216 Bath Road, Slough, SL1 3WE, UK
| | - Susanne Sievers
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Straße 8, 17487, Greifswald, Germany
| | - Daniela Zühlke
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Straße 8, 17487, Greifswald, Germany
| | - Thomas Sura
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Straße 8, 17487, Greifswald, Germany
| | - Emma Dave
- UCB Celltech, 216 Bath Road, Slough, SL1 3WE, UK
| | - Katharina Riedel
- Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Straße 8, 17487, Greifswald, Germany
| | - Colin Robinson
- School of Biosciences, University of Kent, Canterbury, CT2 7NJ, UK.
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13
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Stobernack T, du Teil Espina M, Mulder LM, Palma Medina LM, Piebenga DR, Gabarrini G, Zhao X, Janssen KMJ, Hulzebos J, Brouwer E, Sura T, Becher D, van Winkelhoff AJ, Götz F, Otto A, Westra J, van Dijl JM. A Secreted Bacterial Peptidylarginine Deiminase Can Neutralize Human Innate Immune Defenses. mBio 2018; 9:mBio.01704-18. [PMID: 30377277 PMCID: PMC6212822 DOI: 10.1128/mbio.01704-18] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [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] [Indexed: 02/06/2023] Open
Abstract
The keystone oral pathogen Porphyromonas gingivalis is associated with severe periodontitis. Intriguingly, this bacterium is known to secrete large amounts of an enzyme that converts peptidylarginine into citrulline residues. The present study was aimed at identifying possible functions of this citrullinating enzyme, named Porphyromonas peptidylarginine deiminase (PPAD), in the periodontal environment. The results show that PPAD is detectable in the gingiva of patients with periodontitis, and that it literally neutralizes human innate immune defenses at three distinct levels, namely bacterial phagocytosis, capture in neutrophil extracellular traps (NETs), and killing by the lysozyme-derived cationic antimicrobial peptide LP9. As shown by mass spectrometry, exposure of neutrophils to PPAD-proficient bacteria reduces the levels of neutrophil proteins involved in phagocytosis and the bactericidal histone H2. Further, PPAD is shown to citrullinate the histone H3, thereby facilitating the bacterial escape from NETs. Last, PPAD is shown to citrullinate LP9, thereby restricting its antimicrobial activity. The importance of PPAD for immune evasion is corroborated in the infection model Galleria mellonella, which only possesses an innate immune system. Together, the present observations show that PPAD-catalyzed protein citrullination defuses innate immune responses in the oral cavity, and that the citrullinating enzyme of P. gingivalis represents a new type of bacterial immune evasion factor.IMPORTANCE Bacterial pathogens do not only succeed in breaking the barriers that protect humans from infection, but they also manage to evade insults from the human immune system. The importance of the present study resides in the fact that protein citrullination is shown to represent a new bacterial mechanism for immune evasion. In particular, the oral pathogen P. gingivalis employs this mechanism to defuse innate immune responses by secreting a protein-citrullinating enzyme. Of note, this finding impacts not only the global health problem of periodontitis, but it also extends to the prevalent autoimmune disease rheumatoid arthritis, which has been strongly associated with periodontitis, PPAD activity, and loss of tolerance against citrullinated proteins, such as the histone H3.
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Affiliation(s)
- Tim Stobernack
- Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Marines du Teil Espina
- Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Lianne M Mulder
- Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Laura M Palma Medina
- Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Dillon R Piebenga
- Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Giorgio Gabarrini
- Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Department of Periodontology, University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Groningen, The Netherlands
| | - Xin Zhao
- Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Koen M J Janssen
- Department of Oral and Maxillofacial Surgery, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Jarnick Hulzebos
- Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Elisabeth Brouwer
- Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Thomas Sura
- Institute for Microbiology, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany
| | - Dörte Becher
- Institute for Microbiology, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany
| | - Arie Jan van Winkelhoff
- Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Department of Periodontology, University of Groningen, University Medical Center Groningen, Center for Dentistry and Oral Hygiene, Groningen, The Netherlands
| | - Friedrich Götz
- Microbial Genetics, Interfaculty Institute of Microbiology and Infection Medicine and Infection Medicine (IMIT), University of Tübingen, Tübingen, Germany
| | - Andreas Otto
- Institute for Microbiology, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany
| | - Johanna Westra
- Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Jan Maarten van Dijl
- Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
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14
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Hoyer J, Bartel J, Gómez-Mejia A, Rohde M, Hirschfeld C, Heß N, Sura T, Maaß S, Hammerschmidt S, Becher D. Proteomic response of Streptococcus pneumoniae to iron limitation. Int J Med Microbiol 2018; 308:713-721. [PMID: 29496408 DOI: 10.1016/j.ijmm.2018.02.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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: 09/20/2017] [Revised: 02/08/2018] [Accepted: 02/12/2018] [Indexed: 11/18/2022] Open
Abstract
Iron is an essential trace element and involved in various key metabolic pathways in bacterial lifestyle. Within the human host, iron is extremely limited. Hence, the ability of bacteria to acquire iron from the environment is critical for a successful infection. Streptococcus pneumoniae (the pneumococcus) is a human pathobiont colonizing symptomless the human respiratory tract, but can also cause various local and invasive infections. To survive and proliferate pneumococci have therefore to adapt their metabolism and virulence factor repertoire to different host compartments. In this study, the response of S. pneumoniae to iron limitation as infection-relevant condition was investigated on the proteome level. The iron limitation was induced by application of the iron chelator 2,2'-bipyridine (BIP) in two different media mimicking different physiological traits. Under these conditions, the influence of the initial iron concentration on pneumococcal protein expression in response to limited iron availability was analyzed. Interestingly, one major difference between these two iron limitation experiments is the regulation of proteins involved in pneumococcal pathogenesis. In iron-poor medium several proteins of this group were downregulated whereas these proteins are upregulated in iron-rich medium. However, iron limitation in both environments led to a strong upregulation of the iron uptake protein PiuA and the significant downregulation of the non-heme iron-containing ferritin Dpr. Based on the results, it is shown that the pneumococcal proteome response to iron limitation is strongly dependent on the initial iron concentration in the medium or the environment.
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Affiliation(s)
- Juliane Hoyer
- Department Microbial Proteomics, Institute for Microbiology, Ernst-Moritz-Arndt University Greifswald, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Jürgen Bartel
- Department Microbial Proteomics, Institute for Microbiology, Ernst-Moritz-Arndt University Greifswald, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Alejandro Gómez-Mejia
- Department Genetics of Microorganisms, Interfaculty Institute for Genetics and Functional Genomics, Ernst-Moritz-Arndt University Greifswald, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Manfred Rohde
- Central Facility for Microscopy, Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Claudia Hirschfeld
- Department Microbial Proteomics, Institute for Microbiology, Ernst-Moritz-Arndt University Greifswald, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Nathalie Heß
- Department Genetics of Microorganisms, Interfaculty Institute for Genetics and Functional Genomics, Ernst-Moritz-Arndt University Greifswald, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Thomas Sura
- Department Microbial Proteomics, Institute for Microbiology, Ernst-Moritz-Arndt University Greifswald, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Sandra Maaß
- Department Microbial Proteomics, Institute for Microbiology, Ernst-Moritz-Arndt University Greifswald, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Sven Hammerschmidt
- Department Genetics of Microorganisms, Interfaculty Institute for Genetics and Functional Genomics, Ernst-Moritz-Arndt University Greifswald, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany
| | - Dörte Becher
- Department Microbial Proteomics, Institute for Microbiology, Ernst-Moritz-Arndt University Greifswald, Felix-Hausdorff-Str. 8, 17489 Greifswald, Germany.
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15
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Otto A, Biran D, Sura T, Becher D, Ron EZ. Proteomics of septicemic Escherichia coli. Proteomics Clin Appl 2016; 10:1020-1024. [DOI: 10.1002/prca.201600049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 08/03/2016] [Accepted: 09/02/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Andreas Otto
- Institute for Microbiology; Ernst-Moritz-Arndt Universität; Greifswald Germany
| | - Dvora Biran
- Department of Molecular Microbiology and Biotechnology; Faculty of Life Sciences; Tel Aviv University; Tel Aviv Israel
| | - Thomas Sura
- Institute for Microbiology; Ernst-Moritz-Arndt Universität; Greifswald Germany
| | - Dörte Becher
- Institute for Microbiology; Ernst-Moritz-Arndt Universität; Greifswald Germany
| | - Eliora Z. Ron
- Department of Molecular Microbiology and Biotechnology; Faculty of Life Sciences; Tel Aviv University; Tel Aviv Israel
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16
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Sirivarasai J, Kaojarern S, Chansirikarnjana S, Sura T, Krairit O, Chunhabundit R, Chanprasertyothin S, Chotvitayataragorn S, Prasanatikom W. P2-285 Environmental cadmium exposure and blood pressure in the general population. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976k.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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17
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Mahasirimongkol S, Yanai H, Nishida N, Ridruechai C, Matsushita I, Ohashi J, Summanapan S, Yamada N, Moolphate S, Chuchotaworn C, Chaiprasert A, Manosuthi W, Kantipong P, Kanitwittaya S, Sura T, Khusmith S, Tokunaga K, Sawanpanyalert P, Keicho N. Genome-wide SNP-based linkage analysis of tuberculosis in Thais. Genes Immun 2008; 10:77-83. [PMID: 18843276 DOI: 10.1038/gene.2008.81] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Tuberculosis, a potentially fatal infectious disease, affects millions of individuals annually worldwide. Human protective immunity that contains tuberculosis after infection has not been clearly defined. To gain insight into host genetic factors, nonparametric linkage analysis was performed using high-throughput microarray-based single nucleotide polymorphism (SNP) genotyping platform, a GeneChip array comprised 59 860 bi-allelic markers, in 93 Thai families with multiple siblings, 195 individuals affected with tuberculosis. Genotyping revealed a region on chromosome 5q showing suggestive evidence of linkage with tuberculosis (Z(lr) statistics=3.01, logarithm of odds (LOD) score=2.29, empirical P-value=0.0005), and two candidate regions on chromosomes 17p and 20p by an ordered subset analysis using minimum age at onset of tuberculosis as the covariate (maximum LOD score=2.57 and 3.33, permutation P-value=0.0187 and 0.0183, respectively). These results imply a new evidence of genetic risk factors for tuberculosis in the Asian population. The significance of these ordered subset results supports a clinicopathological concept that immunological impairment in the disease differs between young and old tuberculosis patients. The linkage information from a specific ethnicity may provide unique candidate regions for the identification of the susceptibility genes and further help elucidate the immunopathogenesis of tuberculosis.
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Affiliation(s)
- S Mahasirimongkol
- Medical Genetic Section, National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
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18
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Vasilescu A, Terashima Y, Enomoto M, Heath S, Poonpiriya V, Gatanaga H, Do H, Diop G, Hirtzig T, Auewarakul P, Lauhakirti D, Sura T, Charneau P, Marullo S, Therwath A, Oka S, Kanegasaki S, Lathrop M, Matsushima K, Zagury JF, Matsuda F. A haplotype of the human CXCR1 gene protective against rapid disease progression in HIV-1+ patients. Proc Natl Acad Sci U S A 2007; 104:3354-9. [PMID: 17360650 PMCID: PMC1805621 DOI: 10.1073/pnas.0611670104] [Citation(s) in RCA: 22] [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: 11/24/2006] [Indexed: 11/18/2022] Open
Abstract
Chemokines and their receptors are key factors in the onset and progression of AIDS. Among them, accumulating evidence strongly indicates the involvement of IL-8 and its receptors, CXCR1 and CXCR2, in AIDS-related conditions. Through extensive investigation of genetic variations of the human CXCR1-CXCR2 locus, we identified a haplotype of the CXCR1 gene (CXCR1-Ha) carrying two nonsynonymous single nucleotide polymorphisms, CXCR1_300 (Met to Arg) in the N terminus extracellular domain and CXCR1_142 (Arg to Cys) in the C terminus intracellular domain. Transfection experiments with CXCR1 cDNAs corresponding to the CXCR1-Ha and the alternative CXCR1-HA haplotype showed reduced expression of CD4 and CXCR4 in CXCR1-Ha cells in human osteosarcoma cells as well as in Jurkat and CEM human T lymphocytes. Furthermore, the efficiency of X4-tropic HIV-1(NL4-3) infection was significantly lower in CXCR1-Ha cells than in CXCR1-HA cells. The results were further confirmed by a series of experiments using six HIV-1 clinical isolates from AIDS patients. A genetic association study was performed by using an HIV-1(+) patient cohort consisting of two subpopulations of AIDS with extreme phenotypes of rapid and slow progression of the disease. The frequency of the CXCR1-Ha allele is markedly less frequent in patients with rapid disease onset than those with slow progression (P = 0.0003). These results provide strong evidence of a protective role of the CXCR1-Ha allele on disease progression in AIDS, probably acting through modulation of CD4 and CXCR4 expression.
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Affiliation(s)
- A. Vasilescu
- Centre National de Génotypage, 91057 Evry, France
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
| | - Y. Terashima
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan
- Effector Cell Institute, Inc., Tokyo 150-0036, Japan
| | - M. Enomoto
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan
- Effector Cell Institute, Inc., Tokyo 150-0036, Japan
| | - S. Heath
- Centre National de Génotypage, 91057 Evry, France
| | - V. Poonpiriya
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan
| | - H. Gatanaga
- AIDS Clinical Center, International Medical Center of Japan, Tokyo 162-8655, Japan
| | - H. Do
- Centre National de Génotypage, 91057 Evry, France
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
| | - G. Diop
- Centre National de Génotypage, 91057 Evry, France
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
| | - T. Hirtzig
- Centre National de Génotypage, 91057 Evry, France
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
| | - P. Auewarakul
- Department of Microbiology, Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - D. Lauhakirti
- Department of Microbiology, Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - T. Sura
- Department of Molecular Biology, Ramathibodi Hospital, Mahidol University, Bangkok 10700, Thailand
| | - P. Charneau
- Virologie Moléculaire et Vectorologie, Institut Pasteur, 75724 Paris, France
| | - S. Marullo
- Département de Biologie Cellulaire et de Maladies Infectieuses, Institut Cochin, 75014 Paris, France
| | - A. Therwath
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
- Laboratoire d'Oncologie Moléculaire, Université Paris 7, 75251 Paris, France; and
| | - S. Oka
- AIDS Clinical Center, International Medical Center of Japan, Tokyo 162-8655, Japan
| | - S. Kanegasaki
- Effector Cell Institute, Inc., Tokyo 150-0036, Japan
| | - M. Lathrop
- Centre National de Génotypage, 91057 Evry, France
| | - K. Matsushima
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan
| | - J.-F. Zagury
- Equipe Génomique, Bioinformatique et Pathologies du Système Immunitaire, Institut National de la Santé et de la Recherche Médicale U736, 75006 Paris, France
| | - F. Matsuda
- Centre National de Génotypage, 91057 Evry, France
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
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19
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Chuenkongkaew WL, Lertrit P, Poonyathalang A, Sura T, Ruangvaravate N, Atchaneeyasakul L, Suphavilai R. Leber's hereditary optic neuropathy in Thailand. Jpn J Ophthalmol 2001; 45:665-8. [PMID: 11754915 DOI: 10.1016/s0021-5155(01)00423-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE To study the clinical features of Leber's hereditary optic neuropathy (LHON) in Thai patients as compared with patients in the United States, Europe, and other Asian countries. METHODS The blood mitochondrial DNA of patients from 19 Thai pedigree families was studied for LHON mutation by restriction enzyme analysis. RESULTS Mitochondrial mutation at nucleotide position 11778 was detected in 37 affected patients and 21 unaffected maternal relatives. Ten of the 19 families were sporadic in transmission. The male preponderance in affected patients was 76%. The onset of visual loss ranged from 6 to 53 years of age (mean = 21.5 years). Of the 31 patients whose eyes were affected bilaterally, 48.4% developed visual loss simultaneously. Unilateral visual loss was found in 2 patients but 1 already had a blind eye resulting from trauma. Onset interval between eyes was up to 12 months (mean = 2.3 months). No associated heart disease or neurological disorder was detected in our pedigrees. Hyperemic disc, retinal telangiectasia, and tortuosity of vessels appeared on ophthalmoscopy in 29% of the patients. Final visual outcome was 0.1, or worse in 82.3%, with a mean follow-up period of 19.5 months. CONCLUSION The clinical features of LHON in Thai patients are similar to those found in patients harboring the 11778 mutation in the United States, Europe, and Japan. However, although there is a male predominance in all populations studied, this is not so marked in the European and Thai populations.
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Affiliation(s)
- W L Chuenkongkaew
- Department of Ophthalmology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
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20
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Limprasert P, Ruangdaraganon N, Sura T, Vasiknanonte P, Jinorose U. Molecular screening for fragile X syndrome in Thailand. Southeast Asian J Trop Med Public Health 2001; 30 Suppl 2:114-8. [PMID: 11400746] [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] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Fragile X syndrome (FXS) is the most common form of inherited mental retardation. We screened for FXS in 237 Thai males (age < or = 15 years) with developmental delay of unknown cause. We found 16 (6.8%) to have FXS using standard molecular analysis. Wc then studied the extended families of these 16 FXS subjects and 4 other independently ascertained FXS cases. We found that there were at least 35 affected males and 8 affected females. In addition we found that there were at least 31 premutation carrier females and 4 premutation males. The CGG repeats numbers in these premutation individuals ranged from 60 to 125. By comparison, the normal CGG repeats were 19-50 with a heterozygosity of 67.2% in 337 randomly selected males. This study providcs insight into the high incidence of FXS in developmentally delayed Thai males and points the way toward the means of prevention of mental retardation by genetic counseling and prenatal diagnosis.
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Affiliation(s)
- P Limprasert
- Department of Pathology, Faculty of Medicine. Prince of Songkla University, Hat Yai, Thailand
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21
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Suwanjutha S, Huang NN, Wattanasirichaigoon D, Sura T, Harris A, Macek M. Case report of a Thai male cystic fibrosis patinet with the 1898+ 1G-->T splicing mutation in the CFTR gene: a review of East Asian cases. Mutations in brief no. 196. Online. Hum Mutat 2001; 12:361. [PMID: 10671057] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Cystic fibrosis (CF) is the most common fatal autosomal recessive multisystem disorder, which occurs mainly in European-derived populations. The incidence of CF varies between 1 in 2000 to 3000 live-births in various ethnic groups. The disease is rare in East Asians. Here we report a 9 year old Thai male patient, who was diagnosed to have CF based on recurrent pneumonia, a slow weight gain, pancreatic insufficiency and repeatedly elevated sweat chloride levels by two different methods. A comprehensive genetic analysis showed the splicing mutation, 1898+ 1G-->T, which was apparently of maternal origin. Literature search found 39 documented cases of CF patients in East Asians. CFTR (MIM# 602421) genotyping was performed in 14 patients including our patient and in 9 of them a CF allele was identified. The findings seem to indicate that the splicing mutations, 1898+ 1G-->T and 1898+ 5G-->T are more common in East Asian CF patients.
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Affiliation(s)
- S Suwanjutha
- Department of Pediatrics and Division of Medical Genetics and Molecular Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand.
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22
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Angchaisuksiri P, Pingsuthiwong S, Sura T, Aryuchai K, Busabaratana M, Atichartakarn V. Prevalence of the C677T methylenetetra- hydrofolate reductase mutation in Thai patients with deep vein thrombosis. Acta Haematol 2001; 103:191-6. [PMID: 11014892 DOI: 10.1159/000041048] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We investigated the prevalence of a genetic variation in the 5, 10-methylenetetrahydrofolate reductase (MTHFR) gene (C677T) using polymerase chain reaction techniques in a sample of 500 general Thai population and among 40 unselected Thai patients with an objectively confirmed history of deep vein thrombosis (DVT). The prevalence of the mutated homozygous and heterozygous C677T MTHFR genotype in the group of 500 healthy Thai population was 1.4 and 25.6%, respectively (allele frequency of 14.2%). Of the 40 patients studied, none were homozygotes and 15% were heterozygotes for the C677T MTHFR gene mutation (allele frequency of 7.5%). There was no significant difference in genotype frequency between patients and control groups (p = 0.09). Odds ratios for the probability of the C677T MTHFR gene mutation in the patient versus control group were 0.49 (95% CI 0. 21-1.12). These data indicated that the C677T MTHF gene mutation was not associated with DVT in the Thai population. The lower frequency of the C677T MTHFR gene mutation in our Thai population compared with reports from other studies suggests a wide heterogeneity in the 677T MTHFR genotype frequencies of the different ethnic populations even among Asians.
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Affiliation(s)
- P Angchaisuksiri
- Department of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand.
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23
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Limprasert P, Saechan V, Ruangdaraganon N, Sura T, Vasiknanote P, Jaruratanasirikul S, Brown WT. Haplotype analysis at the FRAXA locus in Thai subjects. Am J Med Genet 2001; 98:224-9. [PMID: 11169559] [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] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
The prevalence of fragile X syndrome (FXS) is approximately 7% in Thai boys with developmental delay of unknown cause. To determine if FXS might have a specific haplotype association, we analyzed 125 unrelated control subjects and 25 unrelated FXS patients using 3 microsatellites, DXS548, FRAXAC1 and FRAXE, and two single nucleotide polymorphisms, ATL1 and IVS10. FRAXAC1 and DXS548 are located approximately 7 kb and approximately 150 kb proximal to the CGG-FMR1 whereas ATL1, IVS10 and FRAXE are located approximately 5.6 kb, approximately 24.5 kb and approximately 600 kb distal to the CGG-FMR1. We found 40 haplotypes in the control group and 14 haplotypes in the FXS group. Of 14 haplotypes in the FXS group, 6 haplotypes were not found in the control group suggesting possible new mutations or admixture of immigrant haplotypes. We observed that most diverse haplotypes came from different FRAXE alleles. For this reason, we analyzed haplotypes composed from the remaining markers alone (DXS548-FRAXAC1-ATL1-IVS10). We found 2 major haplotypes (20-18-G-T and 20-19-A-C) with no significant haplotype differences between the control group (67/125 of 20-18-G-T and 25/125 of 20-19-A-C) and FXS group (16/25 of 20-18-G-T and 6/25 of 20-19-A-C). The other haplotypes found were 33/125 in the control group and 3/25 in the FXS group. The two major haplotypes associated FXS in Thai subjects were the two most common haplotypes in the normal Thai subjects. We could not prove, therefore, that there were founder effects at the FRAXA locus in Thailand. We could not, however, exclude it completely. These findings apparently contrast with most other reports on FXS founder effects in various ethnic groups.
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Affiliation(s)
- P Limprasert
- Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand.
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24
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Limprasert P, Ruangdaraganon N, Vasiknanonte P, Sura T, Jaruratanasirikul S, Sriwongpanich N, Sriplung H. A clinical checklist for fragile X syndrome: screening of Thai boys with developmental delay of unknown cause. J Med Assoc Thai 2000; 83:1260-6. [PMID: 11143494] [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] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
The aim of this study was to determine a cost-effective clinical checklist for fragile X syndrome (FXS) screening in a Thai male pediatric population with developmental delay of unknown cause. We studied 179 non-FXS male patients and 27 FXS patients from 18 families (age < or = 15 years). A six-item clinical checklist was used including family history (FH), long and narrow face (F), prominent and large ears (E), attention deficit/hyperactivity (AH), autistic-like behavior (AT) and testicular volume (T). These were scored as 0 if absent, 1 if borderline, and 2 if present. All patients were tested by using PCR and/or southern blot for the FMR1 gene. We used a logistic regression model from a computer program to analyze the data (Stata, version 5.0). We used logistic regression with cluster in the same family (average score) to eliminate bias from the related FXS cases. We found that a five-item checklist, 2FH + F + 0.5E + 2AH + T = total score, was the best model. When we used this clinical checklist with a threshold of total score of 4, 78.7 per cent of the screened cases with total scores < or = 4 could be eliminated as negative cases. In addition, all positive FXS cases had total scores > 4. We propose this five-item model for FXS screening in clinical pediatric practice, particularly from Asian population settings.
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Affiliation(s)
- P Limprasert
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Thailand
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25
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Angchaisuksiri P, Pingsuthiwong S, Aryuchai K, Busabaratana M, Sura T, Atichartakarn V, Sritara P. Prevalence of the G1691A mutation in the factor V gene (factor V Leiden) and the G20210A prothrombin gene mutation in the Thai population. Am J Hematol 2000; 65:119-22. [PMID: 10996828 DOI: 10.1002/1096-8652(200010)65:2<119::aid-ajh5>3.0.co;2-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We investigated the prevalence of a genetic variation in the factor V gene (G1691A Leiden mutation) and the prothrombin gene (G20210A) using polymerase chain reaction techniques in samples from 500 normal Thai population and among 50 unselected Thai patients with an objectively confirmed history of deep venous thrombosis. The prevalence of factor V Leiden and the prothrombin G20210A gene mutation in a group of 500 healthy controls was 0.2% in both groups (allele frequency of 0.1%). Of the 50 adult patients studied, none was a carrier of factor V Leiden or the prothrombin G20210A gene mutation. Our findings confirm that the prevalence of factor V Leiden and prothrombin G20210A gene mutation is lower among Asians than Caucasians and that the distribution of factor V Leiden is similar to that of the prothrombin G20210A variant. The low prevalence of these two mutations can, at least in part, account for the lower frequency of deep venous thrombosis reported in the Thai population. Screening for factor V Leiden and prothrombin gene mutation is of limited benefit and may not be cost-effective in Thai patients with the first episode of deep venous thrombosis.
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Affiliation(s)
- P Angchaisuksiri
- Department of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand.
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26
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Ruangdaraganon N, Limprasert P, Sura T, Sombuntham T, Sriwongpanich N, Kotchabhakdi N. Prevalence and clinical characteristics of fragile X syndrome at child development clinic, Ramathibodi Hospital. J Med Assoc Thai 2000; 83:69-76. [PMID: 10710872] [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] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Fragile X syndrome, the most common cause of inherited mental retardation, is an X-linked genetic disorder caused by an expanded CGG repeat in the fragile X mental retardation 1 gene. It is characterized by mental retardation, behavioral features, and physical features, such as a long face with large protruding ears and macro-orchidism. A screening for the syndrome was conducted in a representative sample of pediatric patients, who had developmental delay or mental retardation with unknown cause, at the Child Development Clinic, Ramathibodi Hospital. The DNA test was performed on all patients using PCR and southern blot techniques. Five positive cases were detected from 114 screened subjects, and more four cases confirmed among other family members. Two of five positive families initially denied a family history of mental retardation. Among 9 cases of fragile X syndrome, four had hyperactivity and two had autistic like behavior. More than half had rather a long face or prominent ears. Three boys had macro-orchidism.
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Affiliation(s)
- N Ruangdaraganon
- Department of Pediatrics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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27
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Manitchotpisit B, Kunachak S, Kulapraditharom B, Sura T. Combined use of fine needle aspiration cytology and polymerase chain reaction in the diagnosis of cervical tuberculous lymphadenitis. J Med Assoc Thai 1999; 82:363-8. [PMID: 10410498] [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] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Although fine needle aspiration cytology (FNAC) is an effective mean for the diagnosis of cervical tuberculous lymphadenitis (CTL), it still poses a certain degree of false negative and false positive. The objective of this study was to determine the efficiency of polymerase chain reaction (PCR) in combination with fine needle aspiration cytology in the diagnosis of CTL. Thirty three patients who presented with enlarged cervical lymph nodes, and were clinically suggestive of CTL were included in the study. Fine needle aspiration or surgical biopsy of lymph nodes was performed, the specimens were studied for cytology, acid fast bacilli stain, culture for mycobacteria and PCR technique. The sensitivity and specificity of FNAC was 48 per cent and 87.5 per cent respectively, while that of PCR was 84 per cent and 75 per cent respectively. When FNAC and PCR were combined, the sensitivity and specificity increased to 84 per cent and 100 per cent respectively. We concluded that FNAC in combination with the PCR technique is a fast and effective clinical diagnostic approach for CTL.
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Affiliation(s)
- B Manitchotpisit
- Department of Otolaryngology-Head-Neck Surgery, Faculty of Medicine, Ramathibodi Hospital, Bangkok, Thailand
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28
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Pramoolsinsap C, Poovorawan Y, Sura T, Theamboonlers A, Busagorn N, Kurathong S. Hepatitis G infection and therapeutic response to interferon in HCV-related chronic liver disease. Southeast Asian J Trop Med Public Health 1998; 29:480-90. [PMID: 10437943] [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] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Circulating HGV-RNA was determined in 117 patients with HCV-related chronic liver disease and in 200 healthy blood donors. The patients, aged 50.8+/-13.8 years, were classified as chronic hepatitis (CH; n = 82), liver cirrhosis (n = 25) and hepatocellular carcinoma (HCC; n = 10). HGV-RNA was detected in 5 (4.3%) patients, all with CH and in 10 (5%) of blood donors. The majority of all groups (52% to 70%) were infected with HCV genotype II/1b, including 4/5 patients with HGV co-infection. Of 5 patients with HGV co-infection, 4 were positive for anti-HBs and anti-HBc and none exhibited jaundice. A 24-week course of interferon treatment with 12-month follow-up was achieved in 27 patients with chronic active hepatitis, including 3 with HGV co-infection. Of these, 55.6% responded to the therapy, but only 6/27 (22.2%) patients were sustained responders. The majority of sustained responders were HCV genotype III/2a (4/6) while genotype II/1b was found in the majority of patients with relapse (7/9) and non-responders (9/12). At the 48- month follow up, 2/6 sustained responders (one with HGV co-infection) became HCV RNA positive. These results show that the prevalence of HGV infection in HCV-related chronic liver disease is low, as in the general population, and is found in younger patients with chronic hepatitis. HGV coinfection does not interfere with clinical severity, disease progression or response to interferon in patients with HCV-related chronic liver disease. The favorable factors ofinterferon treatment for HCV infection are young age, low HCV-RNA levels and HCV genotype III/2a.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Antiviral Agents/therapeutic use
- Carcinoma, Hepatocellular/virology
- Female
- Flaviviridae/genetics
- Flaviviridae/isolation & purification
- Genotype
- Hepacivirus/genetics
- Hepacivirus/isolation & purification
- Hepatitis C, Chronic/complications
- Hepatitis C, Chronic/genetics
- Hepatitis C, Chronic/therapy
- Hepatitis, Viral, Human/complications
- Hepatitis, Viral, Human/epidemiology
- Hepatitis, Viral, Human/therapy
- Humans
- Interferon-alpha/therapeutic use
- Liver Cirrhosis/virology
- Liver Function Tests
- Liver Neoplasms/virology
- Male
- Middle Aged
- RNA, Viral/analysis
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Affiliation(s)
- C Pramoolsinsap
- Department of Medicine, Ramathibodi Hospital, Mahidol University Bangkok, Thailand
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29
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Abstract
The biologic functions attributed to the nucleophosphoprotein p53 have been increasing in recent years. Some studies suggested that wild type p53 is responsible for cell cycle arrest brought about as a response to exposure of mammalian cells to DNA-damaging agents. This cell cycle arrest occurs in order for cells to repair the damaged macromolecules. Extensively damaged cells are also thought to undergo apoptosis via the p53-dependent or -independent signal transduction pathways. In this study, we investigated the ability of diaziridinylbenzoquinones to increase p53 levels in the human breast cancer cell line MCF-7. Diaziquone (AZQ), an anticancer agent, and its derivatives, diaziridinequinone (DZQ) and methyldiaziridinequinone (MeDZQ), induced p53 in a dose- and time-dependent manner as measured by the electrophoretic mobility shift assay. Wild type p53 induction by AZQ was suppressed when DT-diaphorase activity was inhibited by pretreating the cells with dicumarol. Aside from their potent alkylating activity, these agents also undergo redox cycling as evidenced by oxygen consumption and the production of reactive oxygen species (ROS). Inhibition of ROS production by the antioxidant enzyme catalase reduced AZQ- and DZQ-mediated p53 induction by about 45%. Thiotepa, a non-quinone aziridine-containing agent, and 1,4-benzoquinone (p-BQ), a redox cycling quinone, increased p53 levels. The nonalkylator oxygen-radical-generating agent menadione (MD) caused p53 induction only when MCF-7 cells were allowed to recover in drug-free media. On the basis of these data, we propose that the bioreductive activation of AZQ is a prerequisite for p53 induction. Moreover, the induction of p53 by AZQ requires both the quinone and the aziridine moieties of the AZQ molecule. Although AZQ and its analogues increased p53 levels in MCF-7 cells, p53 induction in these cells may not be responsible for the apoptosis seen upon treatment of MCF-7 cells with these agents. The uncoupling of p53 induction and apoptosis is evidenced by the generation of nucleosomal DNA laddering in aziridinequinone-treated T47D cells, a breast cancer cell line bearing a p53 mutation.
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Affiliation(s)
- E O Ngo
- Department of Pharmacology, University of Minnesota, 435 Delaware Street SE, Minneapolis, Minnesota 55455, USA
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30
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Abstract
Melioidosis is a potentially lethal infection of humans and animals in Southeast Asia and northern Australia. Current methods for detection of the causative organism, Burkholderia pseudomallei, lack both speed and sensitivity. We report the development of a highly sensitive polymerase chain reaction-based method that can detect as few as 35 colony-forming units of B. pseudomallei/mL in saline suspensions. This polymerase chain reaction test also detected the presence of B. pseudomallei DNA in culture-negative splenic tissue obtained from mice infected with the organism, but without clinical evidence of disease. Specificity has been confirmed using a variety of pathogenic and nonpathogenic organisms, including B. mallei, B. cepacia, and Pseudomonas species. The clinical usefulness of this test should be assessed prospectively and compared with conventional diagnostic techniques.
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Affiliation(s)
- T Sura
- Department of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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31
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Krishna S, Pukrittayakamee S, Supanaranond W, ter Kuile F, Ruprah M, Sura T, White NJ. Fever in uncomplicated Plasmodium falciparum malaria: randomized double-'blind' comparison of ibuprofen and paracetamol treatment. Trans R Soc Trop Med Hyg 1995; 89:507-9. [PMID: 8560525 DOI: 10.1016/0035-9203(95)90087-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [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] [Indexed: 01/31/2023] Open
Abstract
Fever almost invariably accompanies uncomplicated falciparum malaria. In a randomized, double-'blind' study, we compared a single dose of ibuprofen (10 mg/kg, n = 8) with paracetamol (15 mg/kg, n = 8) for the treatment of fever > 38.5 degrees C due to uncomplicated falciparum malaria. Ibuprofen was significantly more effective than paracetamol in lowering temperatures throughout the first 4.5 h after dosing (P = 0.016) and should be considered as an antipyretic agent in the management of uncomplicated falciparum infections, providing there is no contraindication to its use.
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Affiliation(s)
- S Krishna
- Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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32
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Sumethkul V, Jirasiritham S, Sura T, Chiewsilp P. Renal transplantation between identical twins: the application of reciprocal full-thickness skin grafts as a guideline for antirejection therapy. Transplant Proc 1994; 26:2141-2. [PMID: 8066700 DOI: pmid/8066700] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- V Sumethkul
- Department of Medicine, Ramathibodi Hospital Medical School, Mahidol University, Bangkok, Thailand
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33
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Hall GW, Franklin IM, Sura T, Thein SL. A novel mutation (nonsense beta 127) in exon 3 of the beta globin gene produces a variable thalassaemic phenotype. Br J Haematol 1991; 79:342-4. [PMID: 1958498 DOI: 10.1111/j.1365-2141.1991.tb04548.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- G W Hall
- MRC Molecular Haematology Unit, John Radcliffe Hospital, Oxford
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34
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Olds RJ, Sura T, Jackson B, Wonke B, Hoffbrand AV, Thein SL. A novel delta 0 mutation in cis with Hb Knossos: a study of different genetic interactions in three Egyptian families. Br J Haematol 1991; 78:430-6. [PMID: 1873227 DOI: 10.1111/j.1365-2141.1991.tb04460.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We have defined the molecular basis of normal HbA2 beta-thalassaemia associated with Hb Knossos. DNA sequence analysis of the delta globin gene in cis with beta Knossos showed deletion of a single A in codon 59 leading to a premature termination at codon 60. This delta 0/beta Knossos allele has been observed in three unrelated Egyptian families and associated with a single beta haplotype (+----++). One individual who was homozygous for the delta 0/beta Knossos allele as well as heterozygous for a non-deletional alpha thalassaemia, was completely clinically asymptomatic, while others have coinherited the delta 0/beta Knossos allele with different beta and alpha thalassaemia determinants. A study of the different genetic interactions giving rise to a spectrum of clinical phenotypes is reported.
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Affiliation(s)
- R J Olds
- MRC Molecular Haematology Unit, John Radcliffe Hospital, Oxford
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