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Brauer M, Lassek C, Hinze C, Hoyer J, Becher D, Jahn D, Sievers S, Riedel K. What's a Biofilm?-How the Choice of the Biofilm Model Impacts the Protein Inventory of Clostridioides difficile. Front Microbiol 2021; 12:682111. [PMID: 34177868 PMCID: PMC8225356 DOI: 10.3389/fmicb.2021.682111] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 05/12/2021] [Indexed: 12/18/2022] Open
Abstract
The anaerobic pathogen Clostridioides difficile is perfectly equipped to survive and persist inside the mammalian intestine. When facing unfavorable conditions C. difficile is able to form highly resistant endospores. Likewise, biofilms are currently discussed as form of persistence. Here a comprehensive proteomics approach was applied to investigate the molecular processes of C. difficile strain 630Δerm underlying biofilm formation. The comparison of the proteome from two different forms of biofilm-like growth, namely aggregate biofilms and colonies on agar plates, revealed major differences in the formation of cell surface proteins, as well as enzymes of its energy and stress metabolism. For instance, while the obtained data suggest that aggregate biofilm cells express both flagella, type IV pili and enzymes required for biosynthesis of cell-surface polysaccharides, the S-layer protein SlpA and most cell wall proteins (CWPs) encoded adjacent to SlpA were detected in significantly lower amounts in aggregate biofilm cells than in colony biofilms. Moreover, the obtained data suggested that aggregate biofilm cells are rather actively growing cells while colony biofilm cells most likely severely suffer from a lack of reductive equivalents what requires induction of the Wood-Ljungdahl pathway and C. difficile’s V-type ATPase to maintain cell homeostasis. In agreement with this, aggregate biofilm cells, in contrast to colony biofilm cells, neither induced toxin nor spore production. Finally, the data revealed that the sigma factor SigL/RpoN and its dependent regulators are noticeably induced in aggregate biofilms suggesting an important role of SigL/RpoN in aggregate biofilm formation.
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Affiliation(s)
- Madita Brauer
- Department for Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Christian Lassek
- Department for Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Christian Hinze
- Department for Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Juliane Hoyer
- Department for Microbial Proteomics, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Dörte Becher
- Department for Microbial Proteomics, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Dieter Jahn
- Braunschweig Integrated Centre of Systems Biology (BRICS), Institute of Microbiology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Susanne Sievers
- Department for Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Katharina Riedel
- Department for Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald, Greifswald, Germany
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2
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Liu D, Keiblinger KM, Leitner S, Wegner U, Zimmermann M, Fuchs S, Lassek C, Riedel K, Zechmeister-Boltenstern S. Response of Microbial Communities and Their Metabolic Functions to Drying⁻Rewetting Stress in a Temperate Forest Soil. Microorganisms 2019; 7:E129. [PMID: 31086038 PMCID: PMC6560457 DOI: 10.3390/microorganisms7050129] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 05/05/2019] [Accepted: 05/06/2019] [Indexed: 11/23/2022] Open
Abstract
Global climate change is predicted to alter drought-precipitation patterns, which will likely affect soil microbial communities and their functions, ultimately shifting microbially-mediated biogeochemical cycles. The present study aims to investigate the simultaneous variation of microbial community compositions and functions in response to drought and following rewetting events, using a soil metaproteomics approach. For this, an established field experiment located in an Austrian forest with two levels (moderate and severe stress) of precipitation manipulation was evaluated. The results showed that fungi were more strongly influenced by drying and rewetting (DRW) than bacteria, and that there was a drastic shift in the fungal community towards a more Ascomycota-dominated community. In terms of functional responses, a larger number of proteins and a higher functional diversity were observed in both moderate and severe DRW treatments compared to the control. Furthermore, in both DRW treatments a rise in proteins assigned to "translation, ribosomal structure, and biogenesis" and "protein synthesis" suggests a boost in microbial cell growth after rewetting. We also found that the changes within intracellular functions were associated to specific phyla, indicating that responses of microbial communities to DRW primarily shifted microbial functions. Microbial communities seem to respond to different levels of DRW stress by changing their functional potential, which may feed back to biogeochemical cycles.
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Affiliation(s)
- Dong Liu
- Institute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna (BOKU), Peter Jordan-Straße 82, 1190 Vienna, Austria.
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
| | - Katharina M Keiblinger
- Institute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna (BOKU), Peter Jordan-Straße 82, 1190 Vienna, Austria.
| | - Sonja Leitner
- Institute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna (BOKU), Peter Jordan-Straße 82, 1190 Vienna, Austria.
- International Livestock Research Institute (ILRI), Mazingira Centre for Environmental Research and Education, Box 30709, Nairobi 00100, Kenya.
| | - Uwe Wegner
- Institute of Microbiology, University of Greifswald, Friedrich-Ludwig-Jahn-Straße 15, 17489 Greifswald, Germany.
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Correnstraße 3, 06466, Gatersleben, Germany.
| | - Michael Zimmermann
- Institute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna (BOKU), Peter Jordan-Straße 82, 1190 Vienna, Austria.
- Swiss Federal Office for Agriculture, Mattenhofstrasse 5, 3007 Bern, Switzerland.
| | - Stephan Fuchs
- Institute of Microbiology, University of Greifswald, Friedrich-Ludwig-Jahn-Straße 15, 17489 Greifswald, Germany.
| | - Christian Lassek
- Institute of Microbiology, University of Greifswald, Friedrich-Ludwig-Jahn-Straße 15, 17489 Greifswald, Germany.
| | - Katharina Riedel
- Institute of Microbiology, University of Greifswald, Friedrich-Ludwig-Jahn-Straße 15, 17489 Greifswald, Germany.
| | - Sophie Zechmeister-Boltenstern
- Institute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna (BOKU), Peter Jordan-Straße 82, 1190 Vienna, Austria.
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3
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Franke K, Karl I, Centeno TP, Feldmeyer B, Lassek C, Oostra V, Riedel K, Stanke M, Wheat CW, Fischer K. Effects of adult temperature on gene expression in a butterfly: identifying pathways associated with thermal acclimation. BMC Evol Biol 2019; 19:32. [PMID: 30674272 PMCID: PMC6345059 DOI: 10.1186/s12862-019-1362-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 06/06/2018] [Accepted: 01/14/2019] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Phenotypic plasticity is a pervasive property of all organisms and considered to be of key importance for dealing with environmental variation. Plastic responses to temperature, which is one of the most important ecological factors, have received much attention over recent decades. A recurrent pattern of temperature-induced adaptive plasticity includes increased heat tolerance after exposure to warmer temperatures and increased cold tolerance after exposure to cooler temperatures. However, the mechanisms underlying these plastic responses are hitherto not well understood. Therefore, we here investigate effects of adult acclimation on gene expression in the tropical butterfly Bicyclus anynana, using an RNAseq approach. RESULTS We show that several antioxidant markers (e.g. peroxidase, cytochrome P450) were up-regulated at a higher temperature compared with a lower adult temperature, which might play an important role in the acclamatory responses subsequently providing increased heat tolerance. Furthermore, several metabolic pathways were up-regulated at the higher temperature, likely reflecting increased metabolic rates. In contrast, we found no evidence for a decisive role of the heat shock response. CONCLUSIONS Although the important role of antioxidant defence mechanisms in alleviating detrimental effects of oxidative stress is firmly established, we speculate that its potentially important role in mediating heat tolerance and survival under stress has been underestimated thus far and thus deserves more attention.
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Affiliation(s)
- Kristin Franke
- Zoological Institute and Museum, University of Greifswald, D-17489, Greifswald, Germany
| | - Isabell Karl
- Zoological Institute and Museum, University of Greifswald, D-17489, Greifswald, Germany
| | - Tonatiuh Pena Centeno
- Institute for Mathematics and Computer Science, University of Greifswald, D-17487, Greifswald, Germany
| | - Barbara Feldmeyer
- Senckenberg Biodiversity and Climate Research Centre (BiK-F), Molecular Ecology Group, D-60325, Frankfurt am Main, Germany
| | - Christian Lassek
- Institute for Microbiology, University of Greifswald, D-17489, Greifswald, Germany
| | - Vicencio Oostra
- Department of Genetics, Evolution and Environment, University College London, WC1E 6BT, London, UK
| | - Katharina Riedel
- Institute for Microbiology, University of Greifswald, D-17489, Greifswald, Germany
| | - Mario Stanke
- Institute for Mathematics and Computer Science, University of Greifswald, D-17487, Greifswald, Germany
| | | | - Klaus Fischer
- Zoological Institute and Museum, University of Greifswald, D-17489, Greifswald, Germany. .,Present address: Institute for Integrated Natural Sciences, University Koblenz-Landau, Universitätsstraße 1, D-56070, Koblenz, Germany.
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4
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Berges M, Michel AM, Lassek C, Nuss AM, Beckstette M, Dersch P, Riedel K, Sievers S, Becher D, Otto A, Maaß S, Rohde M, Eckweiler D, Borrero-de Acuña JM, Jahn M, Neumann-Schaal M, Jahn D. Iron Regulation in Clostridioides difficile. Front Microbiol 2018; 9:3183. [PMID: 30619231 PMCID: PMC6311696 DOI: 10.3389/fmicb.2018.03183] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [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: 09/24/2018] [Accepted: 12/10/2018] [Indexed: 12/13/2022] Open
Abstract
The response to iron limitation of several bacteria is regulated by the ferric uptake regulator (Fur). The Fur-regulated transcriptional, translational and metabolic networks of the Gram-positive, pathogen Clostridioides difficile were investigated by a combined RNA sequencing, proteomic, metabolomic and electron microscopy approach. At high iron conditions (15 μM) the C. difficile fur mutant displayed a growth deficiency compared to wild type C. difficile cells. Several iron and siderophore transporter genes were induced by Fur during low iron (0.2 μM) conditions. The major adaptation to low iron conditions was observed for the central energy metabolism. Most ferredoxin-dependent amino acid fermentations were significantly down regulated (had, etf, acd, grd, trx, bdc, hbd). The substrates of these pathways phenylalanine, leucine, glycine and some intermediates (phenylpyruvate, 2-oxo-isocaproate, 3-hydroxy-butyryl-CoA, crotonyl-CoA) accumulated, while end products like isocaproate and butyrate were found reduced. Flavodoxin (fldX) formation and riboflavin biosynthesis (rib) were enhanced, most likely to replace the missing ferredoxins. Proline reductase (prd), the corresponding ion pumping RNF complex (rnf) and the reaction product 5-aminovalerate were significantly enhanced. An ATP forming ATPase (atpCDGAHFEB) of the F0F1-type was induced while the formation of a ATP-consuming, proton-pumping V-type ATPase (atpDBAFCEKI) was decreased. The [Fe-S] enzyme-dependent pyruvate formate lyase (pfl), formate dehydrogenase (fdh) and hydrogenase (hyd) branch of glucose utilization and glycogen biosynthesis (glg) were significantly reduced, leading to an accumulation of glucose and pyruvate. The formation of [Fe-S] enzyme carbon monoxide dehydrogenase (coo) was inhibited. The fur mutant showed an increased sensitivity to vancomycin and polymyxin B. An intensive remodeling of the cell wall was observed, Polyamine biosynthesis (spe) was induced leading to an accumulation of spermine, spermidine, and putrescine. The fur mutant lost most of its flagella and motility. Finally, the CRISPR/Cas and a prophage encoding operon were downregulated. Fur binding sites were found upstream of around 20 of the regulated genes. Overall, adaptation to low iron conditions in C. difficile focused on an increase of iron import, a significant replacement of iron requiring metabolic pathways and the restructuring of the cell surface for protection during the complex adaptation phase and was only partly directly regulated by Fur.
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Affiliation(s)
- Mareike Berges
- Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Braunschweig, Germany
| | - Annika-Marisa Michel
- Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Braunschweig, Germany
| | - Christian Lassek
- Center for Functional Genomics of Microbes (CFGM), Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Aaron M Nuss
- Department of Molecular Infection Biology, Helmholtz Centre for Infection Research (HZI), Braunschweig, Germany
| | - Michael Beckstette
- Department of Molecular Infection Biology, Helmholtz Centre for Infection Research (HZI), Braunschweig, Germany
| | - Petra Dersch
- Department of Molecular Infection Biology, Helmholtz Centre for Infection Research (HZI), Braunschweig, Germany
| | - Katharina Riedel
- Center for Functional Genomics of Microbes (CFGM), Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Susanne Sievers
- Center for Functional Genomics of Microbes (CFGM), Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Dörte Becher
- Center for Functional Genomics of Microbes (CFGM), Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Andreas Otto
- Center for Functional Genomics of Microbes (CFGM), Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Sandra Maaß
- Center for Functional Genomics of Microbes (CFGM), Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Manfred Rohde
- Central Facility for Microscopy, Helmholtz Centre for Infection Research (HZI), Braunschweig, Germany
| | - Denitsa Eckweiler
- Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Braunschweig, Germany
| | | | - Martina Jahn
- Institute of Microbiology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Meina Neumann-Schaal
- Leibniz-Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Dieter Jahn
- Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Braunschweig, Germany.,Institute of Microbiology, Technische Universität Braunschweig, Braunschweig, Germany
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5
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Gauernack AS, Lassek C, Hou L, Dzieciolowski J, Evguenieva-Hackenberg E, Klug G. Nop5 interacts with the archaeal RNA exosome. FEBS Lett 2017; 591:4039-4048. [PMID: 29159940 DOI: 10.1002/1873-3468.12915] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 07/20/2017] [Revised: 11/01/2017] [Accepted: 11/08/2017] [Indexed: 01/02/2023]
Abstract
The archaeal exosome, a protein complex responsible for phosphorolytic degradation and tailing of RNA, has an RNA-binding platform containing Rrp4, Csl4, and DnaG. Aiming to detect novel interaction partners of the exosome, we copurified Nop5, which is a part of an rRNA methylating ribonucleoprotein complex, with the exosome of Sulfolobus solfataricus grown to a late stationary phase. We demonstrated the capability of Nop5 to bind to the exosome with a homotrimeric Rrp4-cap and to increase the proportion of polyadenylated RNAin vitro, suggesting that Nop5 is a dual-function protein. Since tailing of RNA probably serves to enhance RNA degradation, association of Nop5 with the archaeal exosome in the stationary phase may enhance tailing and degradation of RNA as survival strategy.
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Affiliation(s)
- A Susann Gauernack
- Institute for Microbiology and Molecular Biology, Justus-Liebig-University Giessen, Germany
| | - Christian Lassek
- Institute for Microbiology and Molecular Biology, Justus-Liebig-University Giessen, Germany
| | - Linlin Hou
- Institute for Microbiology and Molecular Biology, Justus-Liebig-University Giessen, Germany
| | - Julia Dzieciolowski
- Biochemistry and Molecular Biology, Interdisciplinary Research Center, Justus Liebig University Giessen, Germany
| | | | - Gabriele Klug
- Institute for Microbiology and Molecular Biology, Justus-Liebig-University Giessen, Germany
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6
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Cernava T, Erlacher A, Aschenbrenner IA, Krug L, Lassek C, Riedel K, Grube M, Berg G. Deciphering functional diversification within the lichen microbiota by meta-omics. Microbiome 2017; 5:82. [PMID: 28724401 PMCID: PMC5518139 DOI: 10.1186/s40168-017-0303-5] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 07/06/2017] [Indexed: 05/23/2023]
Abstract
BACKGROUND Recent evidence of specific bacterial communities extended the traditional concept of fungal-algal lichen symbioses by a further organismal kingdom. Although functional roles were already assigned to dominant members of the highly diversified microbiota, a substantial fraction of the ubiquitous colonizers remained unexplored. We employed a multi-omics approach to further characterize functional guilds in an unconventional model system. RESULTS The general community structure of the lichen-associated microbiota was shown to be highly similar irrespective of the employed omics approach. Five highly abundant bacterial orders-Sphingomonadales, Rhodospirillales, Myxococcales, Chthoniobacterales, and Sphingobacteriales-harbor functions that are of substantial importance for the holobiome. Identified functions range from the provision of vitamins and cofactors to the degradation of phenolic compounds like phenylpropanoid, xylenols, and cresols. CONCLUSIONS Functions that facilitate the persistence of Lobaria pulmonaria under unfavorable conditions were present in previously overlooked fractions of the microbiota. So far, unrecognized groups like Chthoniobacterales (Verrucomicrobia) emerged as functional protectors in the lichen microbiome. By combining multi-omics and imaging techniques, we highlight previously overlooked participants in the complex microenvironment of the lichens.
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Affiliation(s)
- Tomislav Cernava
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, 8010 Graz, Austria
- Austrian Centre of Industrial Biotechnolgy GmbH, Petersgasse 14, 8010 Graz, Austria
| | - Armin Erlacher
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, 8010 Graz, Austria
| | - Ines Aline Aschenbrenner
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, 8010 Graz, Austria
| | - Lisa Krug
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, 8010 Graz, Austria
| | - Christian Lassek
- Institute of Microbiology, Ernst-Moritz-Arndt University of Greifswald, Friedrich-Ludwig-Jahn Strasse 15, 17489 Greifswald, Germany
| | - Katharina Riedel
- Institute of Microbiology, Ernst-Moritz-Arndt University of Greifswald, Friedrich-Ludwig-Jahn Strasse 15, 17489 Greifswald, Germany
| | - Martin Grube
- Institute of Plant Sciences, University of Graz, Holteigasse 6, 8010 Graz, Austria
| | - Gabriele Berg
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, 8010 Graz, Austria
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7
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Eymann C, Lassek C, Wegner U, Bernhardt J, Fritsch OA, Fuchs S, Otto A, Albrecht D, Schiefelbein U, Cernava T, Aschenbrenner I, Berg G, Grube M, Riedel K. Symbiotic Interplay of Fungi, Algae, and Bacteria within the Lung Lichen Lobaria pulmonaria L. Hoffm. as Assessed by State-of-the-Art Metaproteomics. J Proteome Res 2017; 16:2160-2173. [PMID: 28290203 DOI: 10.1021/acs.jproteome.6b00974] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Lichens are recognized by macroscopic structures formed by a heterotrophic fungus, the mycobiont, which hosts internal autotrophic photosynthetic algal and/or cyanobacterial partners, referred to as the photobiont. We analyzed the structure and functionality of the entire lung lichen Lobaria pulmonaria L. Hoffm. collected from two different sites by state-of-the-art metaproteomics. In addition to the green algae and the ascomycetous fungus, a lichenicolous fungus as well as a complex prokaryotic community (different from the cyanobacteria) was found, the latter dominated by methanotrophic Rhizobiales. Various partner-specific proteins could be assigned to the different lichen symbionts, for example, fungal proteins involved in vesicle transport, algal proteins functioning in photosynthesis, cyanobacterial nitrogenase and GOGAT involved in nitrogen fixation, and bacterial enzymes responsible for methanol/C1-compound metabolism as well as CO-detoxification. Structural and functional information on proteins expressed by the lichen community complemented and extended our recent symbiosis model depicting the functional multiplayer network of single holobiont partners.1 Our new metaproteome analysis strongly supports the hypothesis (i) that interactions within the self-supporting association are multifaceted and (ii) that the strategy of functional diversification within the single lichen partners may support the longevity of L. pulmonaria under certain ecological conditions.
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Affiliation(s)
- Christine Eymann
- Institute of Microbiology, Ernst-Moritz-Arndt-University Greifswald , DE-17487 Greifswald, Germany
| | - Christian Lassek
- Institute of Microbiology, Ernst-Moritz-Arndt-University Greifswald , DE-17487 Greifswald, Germany
| | - Uwe Wegner
- Institute of Microbiology, Ernst-Moritz-Arndt-University Greifswald , DE-17487 Greifswald, Germany
| | - Jörg Bernhardt
- Institute of Microbiology, Ernst-Moritz-Arndt-University Greifswald , DE-17487 Greifswald, Germany
| | - Ole Arno Fritsch
- Institute of Microbiology, Ernst-Moritz-Arndt-University Greifswald , DE-17487 Greifswald, Germany
| | - Stephan Fuchs
- Institute of Microbiology, Ernst-Moritz-Arndt-University Greifswald , DE-17487 Greifswald, Germany
| | - Andreas Otto
- Institute of Microbiology, Ernst-Moritz-Arndt-University Greifswald , DE-17487 Greifswald, Germany
| | - Dirk Albrecht
- Institute of Microbiology, Ernst-Moritz-Arndt-University Greifswald , DE-17487 Greifswald, Germany
| | | | - Tomislav Cernava
- Institute of Environmental Biotechnology, Graz University of Technology , A-8010 Graz, Austria
| | - Ines Aschenbrenner
- Institute of Environmental Biotechnology, Graz University of Technology , A-8010 Graz, Austria.,Institute of Plant Sciences, University of Graz , A-8010 Graz, Austria
| | - Gabriele Berg
- Institute of Environmental Biotechnology, Graz University of Technology , A-8010 Graz, Austria
| | - Martin Grube
- Institute of Plant Sciences, University of Graz , A-8010 Graz, Austria
| | - Katharina Riedel
- Institute of Microbiology, Ernst-Moritz-Arndt-University Greifswald , DE-17487 Greifswald, Germany
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8
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Otto A, Maaß S, Lassek C, Becher D, Hecker M, Riedel K, Sievers S. The protein inventory of Clostridium difficile grown in complex and minimal medium. Proteomics Clin Appl 2016; 10:1068-1072. [PMID: 27511832 DOI: 10.1002/prca.201600069] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 07/21/2016] [Accepted: 08/08/2016] [Indexed: 01/29/2023]
Abstract
The intestinal pathogen Clostridium difficile is causing an increasing number of infections often characterized by severity and high relapse rates. Profound knowledge of the physiology of the pathogen could help to develop new treatment strategies. Proteomics, a valuable tool to study bacterial physiology, was used in this work to establish a benchmark proteome of reference strain C. difficile 630Δerm with MS-based details on all identified proteins. Our elaborate annotation and visualization of C. difficile 630Δerm 3764 ORFs will serve as a valuable base for researchers having to evaluate global expression studies. To exemplify expression variability, protein expression of late exponentially growing cells in complex brain-heart infusion medium and C. difficile minimal medium was compared. Noteworthy results of this comparison are as follows: (i) the higher expression of enzymes for the biosynthesis of some vitamins and purine and (ii) downregulation of proteins involved in butanoate fermentation in C. difficile minimal medium. However, the abundance of proteins involved in DNA metabolism, protein synthesis, and the cell envelope showed no variation between the two growth media.
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Affiliation(s)
- Andreas Otto
- Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Sandra Maaß
- Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Christian Lassek
- Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Dörte Becher
- Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Michael Hecker
- Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Katharina Riedel
- Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Susanne Sievers
- Institute of Microbiology, University of Greifswald, Greifswald, Germany.
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9
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Lassek C, Berger A, Zühlke D, Wittmann C, Riedel K. Proteome and carbon flux analysis of Pseudomonas aeruginosa clinical isolates from different infection sites. Proteomics 2016; 16:1381-5. [PMID: 26959854 DOI: 10.1002/pmic.201500228] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 06/15/2015] [Revised: 01/31/2016] [Accepted: 03/03/2016] [Indexed: 11/11/2022]
Abstract
Pseudomonas aeruginosa is known as opportunistic pathogen frequently isolated from different infection sites. To investigate the expression rates of P. aeruginosa proteins commonly expressed by different clinical isolates, absolute protein quantities were determined employing a gel-free and data-independent LC-IMS(E) approach. Moreover, the metabolic diversity of these isolates was investigated by (13) C-metabolic flux analyses. 812 proteins were reproducibly identified and absolutely quantified for the reference strain P. aeruginosa PAO1, 363 of which were also identified and relatively quantified in all isolates. Whilst the majority of these proteins were expressed in constant amounts, expression rates of 42 proteins were highly variable between the isolates. Notably, the outer membrane protein OprH and the response regulator PhoP were strongly expressed in burned wounds isolates compared to lung/urinary tract isolates. Moreover, proteins involved in iron/amino acids uptake were found to be highly abundant in urinary tract isolates. The fluxome data revealed a conserved glycolysis, and a niche-specific divergence in fluxes through the glyoxylate shunt and the TCA cycle among the isolates. The integrated proteome/fluxome analysis did not indicate straightforward correlation between the protein amount and flux, but rather points to additional layers of regulation that mediate metabolic adaption of P. aeruginosa to different host environments. All MS data have been deposited in the ProteomeXchange with identifier PXD002373 (http://proteomecentral.proteomexchange.org/dataset/PXD002373).
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Affiliation(s)
- Christian Lassek
- Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Antje Berger
- Institute of Biochemical Engineering, TU Braunschweig, Braunschweig, Germany
| | - Daniela Zühlke
- Institute of Microbiology, University of Greifswald, Greifswald, Germany
| | - Christoph Wittmann
- Institute of Systems Biotechnology, Saarland University, Saarbrücken, Germany
| | - Katharina Riedel
- Institute of Microbiology, University of Greifswald, Greifswald, Germany.,Helmholtz Centre for Infection Research, Braunschweig, Germany
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Dietz S, Lassek C, Mack SL, Ritzmann M, Stadler J, Becher D, Hoelzle K, Riedel K, Hoelzle LE. Updating the proteome of the uncultivable hemotrophic Mycoplasma suis in experimentally infected pigs. Proteomics 2015; 16:609-13. [PMID: 26678042 DOI: 10.1002/pmic.201500238] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 06/18/2015] [Revised: 09/22/2015] [Accepted: 12/11/2015] [Indexed: 11/06/2022]
Abstract
Mycoplasma suis belongs to the hemotrophic mycoplasmas that are associated with acute and chronic anemia in a wide range of livestock and wild animals. The inability to culture M. suis in vitro has hindered its characterization at the molecular level. Since the publication of M. suis genome sequences in 2011 only one proteome study has been published. Aim of the presented study was to significantly extend the proteome coverage of M. suis strain KI_3806 during acute infection by applying three different protein extraction methods followed by 1D SDS-PAGE and LC-MS/MS. A total of 404 of 795 M. suis KI_3806 proteins (50.8%) were identified. Data analysis revealed the expression of 83.7% of the predicted ORFs with assigned functions but also highlights the expression of 179 of 523 (34.2%) hypothetical proteins with unknown functions. Computational analyses identified expressed membrane-associated hypothetical proteins that might be involved in adhesion or host-pathogen interaction. Furthermore, analyses of the expressed proteins indicated the existence of a hexose-6-phosphate-transporter and an ECF transporter. In conclusion, our proteome study provides a further step toward the elucidation of the unique life cycle of M. suis and the establishment of an in vitro culture. All MS data have been deposited in the ProteomeXchange with identifier PXD002294 (http://proteomecentral.proteomexchange.org/dataset/PXD002294).
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Affiliation(s)
- Stefanie Dietz
- Department of Environmental and Animal Hygiene, Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
| | - Christian Lassek
- Institute of Microbiology, Ernst-Moritz-Arndt University of Greifswald, Greifswald, Germany
| | - Sarah-Lena Mack
- Department of Environmental and Animal Hygiene, Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
| | - Mathias Ritzmann
- Clinic for Swine, Ludwig-Maximilians-University Munich, Oberschleissheim, Germany
| | - Julia Stadler
- Clinic for Swine, Ludwig-Maximilians-University Munich, Oberschleissheim, Germany
| | - Dörte Becher
- Institute of Microbiology, Ernst-Moritz-Arndt University of Greifswald, Greifswald, Germany
| | - Katharina Hoelzle
- Department of Animal Nutrition, Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
| | - Katharina Riedel
- Institute of Microbiology, Ernst-Moritz-Arndt University of Greifswald, Greifswald, Germany
| | - Ludwig E Hoelzle
- Department of Environmental and Animal Hygiene, Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
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11
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Lassek C, Burghartz M, Chaves-Moreno D, Otto A, Hentschker C, Fuchs S, Bernhardt J, Jauregui R, Neubauer R, Becher D, Pieper DH, Jahn M, Jahn D, Riedel K. A metaproteomics approach to elucidate host and pathogen protein expression during catheter-associated urinary tract infections (CAUTIs). Mol Cell Proteomics 2015; 14:989-1008. [PMID: 25673765 PMCID: PMC4390275 DOI: 10.1074/mcp.m114.043463] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Revised: 01/20/2015] [Indexed: 12/11/2022] Open
Abstract
Long-term catheterization inevitably leads to a catheter-associated bacteriuria caused by multispecies bacterial biofilms growing on and in the catheters. The overall goal of the presented study was (1) to unravel bacterial community structure and function of such a uropathogenic biofilm and (2) to elucidate the interplay between bacterial virulence and the human immune system within the urine. To this end, a metaproteomics approach combined with in vitro proteomics analyses was employed to investigate both, the pro- and eukaryotic protein inventory. Our proteome analyses demonstrated that the biofilm of the investigated catheter is dominated by three bacterial species, that is, Pseudomonas aeruginosa, Morganella morganii, and Bacteroides sp., and identified iron limitation as one of the major challenges in the bladder environment. In vitro proteome analysis of P. aeruginosa and M. morganii isolated from the biofilm revealed that these opportunistic pathogens are able to overcome iron restriction via the production of siderophores and high expression of corresponding receptors. Notably, a comparison of in vivo and in vitro protein profiles of P. aeruginosa and M. morganii also indicated that the bacteria employ different strategies to adapt to the urinary tract. Although P. aeruginosa seems to express secreted and surface-exposed proteases to escape the human innate immune system and metabolizes amino acids, M. morganii is able to take up sugars and to degrade urea. Most interestingly, a comparison of urine protein profiles of three long-term catheterized patients and three healthy control persons demonstrated the elevated level of proteins associated with neutrophils, macrophages, and the complement system in the patient's urine, which might point to a specific activation of the innate immune system in response to biofilm-associated urinary tract infections. We thus hypothesize that the often asymptomatic nature of catheter-associated urinary tract infections might be based on a fine-tuned balance between the expression of bacterial virulence factors and the human immune system.
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Affiliation(s)
- Christian Lassek
- From the ‡Institute of Microbiology, University of Greifswald, 17489 Greifswald, Friedrich-Ludwig-Jahn-Strasse 15, Germany; §Institute of Microbiology, Technische Universität Braunschweig, 38106 Braunschweig, Spielmannstrasse 7, Germany
| | - Melanie Burghartz
- §Institute of Microbiology, Technische Universität Braunschweig, 38106 Braunschweig, Spielmannstrasse 7, Germany
| | - Diego Chaves-Moreno
- ¶Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, 38124 Braunschweig, Inhoffenstrasse 7, Germany
| | - Andreas Otto
- From the ‡Institute of Microbiology, University of Greifswald, 17489 Greifswald, Friedrich-Ludwig-Jahn-Strasse 15, Germany
| | - Christian Hentschker
- From the ‡Institute of Microbiology, University of Greifswald, 17489 Greifswald, Friedrich-Ludwig-Jahn-Strasse 15, Germany
| | - Stephan Fuchs
- From the ‡Institute of Microbiology, University of Greifswald, 17489 Greifswald, Friedrich-Ludwig-Jahn-Strasse 15, Germany
| | - Jörg Bernhardt
- From the ‡Institute of Microbiology, University of Greifswald, 17489 Greifswald, Friedrich-Ludwig-Jahn-Strasse 15, Germany
| | - Ruy Jauregui
- ¶Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, 38124 Braunschweig, Inhoffenstrasse 7, Germany
| | | | - Dörte Becher
- From the ‡Institute of Microbiology, University of Greifswald, 17489 Greifswald, Friedrich-Ludwig-Jahn-Strasse 15, Germany
| | - Dietmar H Pieper
- ¶Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, 38124 Braunschweig, Inhoffenstrasse 7, Germany
| | - Martina Jahn
- §Institute of Microbiology, Technische Universität Braunschweig, 38106 Braunschweig, Spielmannstrasse 7, Germany
| | - Dieter Jahn
- §Institute of Microbiology, Technische Universität Braunschweig, 38106 Braunschweig, Spielmannstrasse 7, Germany
| | - Katharina Riedel
- From the ‡Institute of Microbiology, University of Greifswald, 17489 Greifswald, Friedrich-Ludwig-Jahn-Strasse 15, Germany; ¶Microbial Interactions and Processes Research Group, Helmholtz Centre for Infection Research, 38124 Braunschweig, Inhoffenstrasse 7, Germany;
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12
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Grube M, Cernava T, Soh J, Fuchs S, Aschenbrenner I, Lassek C, Wegner U, Becher D, Riedel K, Sensen CW, Berg G. Exploring functional contexts of symbiotic sustain within lichen-associated bacteria by comparative omics. ISME J 2014; 9:412-24. [PMID: 25072413 DOI: 10.1038/ismej.2014.138] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 06/13/2014] [Accepted: 06/17/2014] [Indexed: 11/09/2022]
Abstract
Symbioses represent a frequent and successful lifestyle on earth and lichens are one of their classic examples. Recently, bacterial communities were identified as stable, specific and structurally integrated partners of the lichen symbiosis, but their role has remained largely elusive in comparison to the well-known functions of the fungal and algal partners. We have explored the metabolic potentials of the microbiome using the lung lichen Lobaria pulmonaria as the model. Metagenomic and proteomic data were comparatively assessed and visualized by Voronoi treemaps. The study was complemented with molecular, microscopic and physiological assays. We have found that more than 800 bacterial species have the ability to contribute multiple aspects to the symbiotic system, including essential functions such as (i) nutrient supply, especially nitrogen, phosphorous and sulfur, (ii) resistance against biotic stress factors (that is, pathogen defense), (iii) resistance against abiotic factors, (iv) support of photosynthesis by provision of vitamin B12, (v) fungal and algal growth support by provision of hormones, (vi) detoxification of metabolites, and (vii) degradation of older parts of the lichen thallus. Our findings showed the potential of lichen-associated bacteria to interact with the fungal as well as algal partner to support health, growth and fitness of their hosts. We developed a model of the symbiosis depicting the functional multi-player network of the participants, and argue that the strategy of functional diversification in lichens supports the longevity and persistence of lichens under extreme and changing ecological conditions.
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Affiliation(s)
- Martin Grube
- Institute of Plant Sciences, Karl-Franzens-University, Graz, Austria
| | - Tomislav Cernava
- Institute of Environmental Biotechnology, Graz University of Technology, Graz, Austria
| | - Jung Soh
- Department of Biochemistry & Molecular Biology, University of Calgary, Calgary, Alberta, Canada
| | - Stephan Fuchs
- Institute of Microbiology, Ernst-Moritz-Arndt University of Greifswald, Greifswald, Germany
| | - Ines Aschenbrenner
- 1] Institute of Plant Sciences, Karl-Franzens-University, Graz, Austria [2] Institute of Environmental Biotechnology, Graz University of Technology, Graz, Austria
| | - Christian Lassek
- Institute of Microbiology, Ernst-Moritz-Arndt University of Greifswald, Greifswald, Germany
| | - Uwe Wegner
- Institute of Microbiology, Ernst-Moritz-Arndt University of Greifswald, Greifswald, Germany
| | - Dörte Becher
- Institute of Microbiology, Ernst-Moritz-Arndt University of Greifswald, Greifswald, Germany
| | - Katharina Riedel
- Institute of Microbiology, Ernst-Moritz-Arndt University of Greifswald, Greifswald, Germany
| | - Christoph W Sensen
- Department of Biochemistry & Molecular Biology, University of Calgary, Calgary, Alberta, Canada
| | - Gabriele Berg
- Institute of Environmental Biotechnology, Graz University of Technology, Graz, Austria
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Lindegaard M, Marvig R, Lassek C, Zühlke D, Riedel K, Molin S, Johansen H, Long K. 55 Investigation of the RetS–GacAS regulatory network in clinical Pseudomonas aeruginosa isolates reveals evolutionary adaptation. J Cyst Fibros 2014. [DOI: 10.1016/s1569-1993(14)60192-2] [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: 11/15/2022]
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14
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Evguenieva-Hackenberg E, Roppelt V, Lassek C, Klug G. Subcellular localization of RNA degrading proteins and protein complexes in prokaryotes. RNA Biol 2011; 8:49-54. [PMID: 21289488 DOI: 10.4161/rna.8.1.14066] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The archaeal exosome is a prokaryotic protein complex with RNA processing and degrading activities. Recently it was shown that the exosome is localized at the periphery of the cell in the thermoacidophilic archaeon Sulfolobus solfataricus. This localization is most likely mediated by the archaeal DnaG protein and depends on (direct or indirect) hydrophobic interactions with the membrane. A localization of RNA degrading proteins and protein complexes was also demonstrated in several bacteria. In bacteria a subcellular localization was also shown for substrates of these proteins and protein complexes, i.e. chromosomally encoded mRNAs and a small RNA. Thus, despite the missing compartmentalization, a spatial organization of RNA processing and degradation exists in prokaryotic cells. Recent data suggest that the spatial organization contributes to the temporal regulation of these processes.
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15
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Roppelt V, Hobel CF, Albers SV, Lassek C, Schwarz H, Klug G, Evguenieva-Hackenberg E. The archaeal exosome localizes to the membrane. FEBS Lett 2010; 584:2791-5. [DOI: 10.1016/j.febslet.2010.05.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2010] [Revised: 04/22/2010] [Accepted: 05/04/2010] [Indexed: 10/19/2022]
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Abstract
OBJECTIVE The intravenous administration of tromethamine (INN, trometamol) lowers the intracranial pressure in patients with brain edema. One postulated mechanism of action is the increase of the pH of the cerebrospinal fluid. METHODS To study tromethamine kinetics in serum and cerebrospinal fluid, nine patients with external ventriculostomies and normal serum creatinine values received 60 mmol intravenous tromethamine (Tris 36.34%, pH 11) over 30 minutes. Serum and cerebrospinal fluid were drawn repeatedly, and concentrations were determined by HPLC. RESULTS Maximum serum concentrations (Cmax) ranged from 211 to 426 mg/L (median, 302 mg/L). The volume of distribution was 0.34 to 0.86 L/kg body weight (median, 0.53 L/kg), and the elimination half-life in serum (t1/2beta) 3.22 to 8.44 hours (median, 4.53 hours). Cerebrospinal fluid Cmax values ranging from 0.68 to 34.14 mg/L (median, 3.88 mg/L) were observed 1 to 12 hours after the end of the tromethamine infusion (median, 2 hours). AUC(CSF)/AUC(S) as a measure of overall cerebrospinal fluid penetration was 0.015 to 0.46 (median, 0.068). Cerebrospinal fluid Cmax and AUC(CSF)/AUC(S) depended on the function of the blood-cerebrospinal fluid barrier. Cerebrospinal fluid t1/2 (8.52 to 14.2 hours; median, 11.2 hours) was substantially longer than the t1/2beta in serum. In vitro, cerebrospinal fluid concentrations < or =30 mg/L did not influence cerebrospinal fluid pH. CONCLUSION Tromethamine cerebrospinal fluid concentrations will be high enough to increase the pH of the cerebrospinal fluid only at large doses and in patients with a pronounced disruption of the blood-cerebrospinal fluid barrier.
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Affiliation(s)
- R Nau
- Department of Neurology, Georg-August-Universität, Göttingen, Germany.
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Nau R, Lassek C, Kinzig-Schippers M, Thiel A, Prange HW, Sörgel F. Disposition and elimination of meropenem in cerebrospinal fluid of hydrocephalic patients with external ventriculostomy. Antimicrob Agents Chemother 1998; 42:2012-6. [PMID: 9687399 PMCID: PMC105725 DOI: 10.1128/aac.42.8.2012] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [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: 02/08/2023] Open
Abstract
The broad antibacterial spectrum and the low incidence of seizures in meropenem-treated patients qualifies meropenem for therapy of bacterial meningitis. The present study evaluates concentrations in ventricular cerebrospinal fluid (CSF) in the absence of pronounced meningeal inflammation. Patients with occlusive hydrocephalus caused by cerebrovascular diseases, who had undergone external ventriculostomy (n = 10, age range 48 to 75 years), received 2 g of meropenem intravenously over 30 min. Serum and CSF were drawn repeatedly and analyzed by liquid chromatography-mass spectroscopy. Pharmacokinetics were determined by noncompartmental analysis. Maximum concentrations in serum were 84.7 +/- 23.7 microg/ml. A CSF maximum (CmaxCSF) of 0.63 +/- 0.50 microg/ml (mean +/- standard deviation) was observed 4.1 +/- 2.6 h after the end of the infusion. CmaxCSF and the area under the curve for CSF (AUCCSF) depended on the AUC for serum (AUCS), the CSF-to-serum albumin ratio, and the CSF leukocyte count. Elimination from CSF was considerably slower than from serum (half-life at beta phase [t1/2beta] of 7.36 +/- 2.89 h in CSF versus t1/2beta of 1.69 +/- 0.60 h in serum). The AUCCSF/AUCS ratio for meropenem, as a measure of overall CSF penetration, was 0.047 +/- 0.022. The AUCCSF/AUCS ratio for meropenem was similar to that for other beta-lactam antibiotics with a low binding to serum proteins. The concentration maxima of meropenem in ventricular CSF observed in this study are high enough to kill fully susceptible pathogens. They may not be sufficient to kill bacteria with a reduced sensitivity to carbapenems, although clinical success has been reported for patients with meningitis caused by penicillin-resistant pneumococci and Pseudomonas aeruginosa.
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Affiliation(s)
- R Nau
- Department of Neurology, University of Göttingen, D-37075 Göttingen, Germany.
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Nau R, Desel H, Lassek C, Thiel A, Schinschke S, Rössing R, Kolenda H, Prange HW. Slow elimination of mannitol from human cerebrospinal fluid. Eur J Clin Pharmacol 1998; 53:271-4. [PMID: 9476044 DOI: 10.1007/s002280050375] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [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: 02/06/2023]
Abstract
OBJECTIVE The rise of intracranial pressure above the pre-treatment level (rebound phenomenon) is considered, in part, a consequence of osmotherapeutics penetrating into the intracranial compartments. METHODS The kinetics of mannitol in the ventricular CSF were studied in 10 patients with cerebrovascular stroke after a single i.v. infusion of 37.5 g over 15 min. RESULTS Maximum mannitol CSF concentrations (mean = 51.1 mg.1-1) were reached 2-12 h after termination of the infusion. Mean t1/2CSF (18.3 h) by far exceeded t1/2S (3.71 h). AUCCSF/AUCS, as a measure of mannitol CSF penetration, ranged from 0.037 to 0.390. CONCLUSION The slow elimination of mannitol from CSF implies a high risk of accumulation in the central nervous compartments after repeated dosing.
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Affiliation(s)
- R Nau
- Department of Neurology, University of Göttingen, Germany
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