1
|
Hofer W, Deschner F, Jézéquel G, Pessanha de Carvalho L, Abdel-Wadood N, Pätzold L, Bernecker S, Morgenstern B, Kany AM, Große M, Stadler M, Bischoff M, Hirsch AKH, Held J, Herrmann J, Müller R. Functionalization of Chlorotonils: Dehalogenil as Promising Lead Compound for In Vivo Application. Angew Chem Int Ed Engl 2024; 63:e202319765. [PMID: 38502093 DOI: 10.1002/anie.202319765] [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: 12/21/2023] [Revised: 02/15/2024] [Accepted: 02/22/2024] [Indexed: 03/20/2024]
Abstract
The natural product chlorotonil displays high potency against multidrug-resistant Gram-positive bacteria and Plasmodium falciparum. Yet, its scaffold is characterized by low solubility and oral bioavailability, but progress was recently made to enhance these properties. Applying late-stage functionalization, we aimed to further optimize the molecule. Previously unknown reactions including a sulfur-mediated dehalogenation were revealed. Dehalogenil, the product of this reaction, was identified as the most promising compound so far, as this new derivative displayed improved solubility and in vivo efficacy while retaining excellent antimicrobial activity. We confirmed superb activity against multidrug-resistant clinical isolates of Staphylococcus aureus and Enterococcus spp. and mature transmission stages of Plasmodium falciparum. We also demonstrated favorable in vivo toxicity, pharmacokinetics and efficacy in infection models with S. aureus. Taken together, these results identify dehalogenil as an advanced lead molecule.
Collapse
Affiliation(s)
- Walter Hofer
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1, 66123, Saarbrücken, Germany
- German Centre for Infection Research (DZIF), Braunschweig, 38124, Germany
| | - Felix Deschner
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1, 66123, Saarbrücken, Germany
- German Centre for Infection Research (DZIF), Braunschweig, 38124, Germany
| | - Gwenaëlle Jézéquel
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1, 66123, Saarbrücken, Germany
- German Centre for Infection Research (DZIF), Braunschweig, 38124, Germany
| | - Laìs Pessanha de Carvalho
- German Centre for Infection Research (DZIF), Braunschweig, 38124, Germany
- Institute of Tropical Medicine, Eberhard Karls University Tübingen, Wilhelmstraße 27, 72074, Tübingen, Germany
| | - Noran Abdel-Wadood
- Institute for Medical Microbiology and Hygiene, Saarland University, 66421, Homburg, Germany
- Institute of Anatomy and Cell Biology /, Saarland University, 66421, Homburg, Germany
| | - Linda Pätzold
- Institute for Medical Microbiology and Hygiene, Saarland University, 66421, Homburg, Germany
| | - Steffen Bernecker
- Microbial Drugs, Helmholtz Centre for Infection Research (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Bernd Morgenstern
- Inorganic Solid State Chemistry, Saarland University Campus, 66123, Saarbrücken, Germany
| | - Andreas M Kany
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1, 66123, Saarbrücken, Germany
- German Centre for Infection Research (DZIF), Braunschweig, 38124, Germany
| | - Miriam Große
- German Centre for Infection Research (DZIF), Braunschweig, 38124, Germany
- Microbial Drugs, Helmholtz Centre for Infection Research (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Marc Stadler
- German Centre for Infection Research (DZIF), Braunschweig, 38124, Germany
- Microbial Drugs, Helmholtz Centre for Infection Research (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, 66421, Homburg, Germany
| | - Anna K H Hirsch
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1, 66123, Saarbrücken, Germany
- German Centre for Infection Research (DZIF), Braunschweig, 38124, Germany
- Helmholtz International Lab for Anti-Infectives, Saarbrücken, 66123, Germany
| | - Jana Held
- German Centre for Infection Research (DZIF), Braunschweig, 38124, Germany
- Institute of Tropical Medicine, Eberhard Karls University Tübingen, Wilhelmstraße 27, 72074, Tübingen, Germany
- Centre de Recherches Médicales de Lambaréné, Lambaréné, BP 242, BP 242, Gabon
| | - Jennifer Herrmann
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1, 66123, Saarbrücken, Germany
- German Centre for Infection Research (DZIF), Braunschweig, 38124, Germany
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1, 66123, Saarbrücken, Germany
- German Centre for Infection Research (DZIF), Braunschweig, 38124, Germany
- Helmholtz International Lab for Anti-Infectives, Saarbrücken, 66123, Germany
| |
Collapse
|
2
|
Gunaratnam G, Leisering R, Wieland B, Dudek J, Miosge N, Becker SL, Bischoff M, Dawson SC, Hannig M, Jacobs K, Klotz C, Aebischer T, Jung P. Characterization of a unique attachment organelle: Single-cell force spectroscopy of Giardia duodenalis trophozoites. Nanoscale 2024; 16:7145-7153. [PMID: 38502112 DOI: 10.1039/d4nr00122b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
The unicellular parasite Giardia duodenalis is the causative agent of giardiasis, a gastrointestinal disease with global spread. In its trophozoite form, G. duodenalis can adhere to the human intestinal epithelium and a variety of other, artificial surfaces. Its attachment is facilitated by a unique microtubule-based attachment organelle, the so-called ventral disc. The mechanical function of the ventral disc, however, is still debated. Earlier studies postulated that a dynamic negative pressure under the ventral disc, generated by persistently beating flagella, mediates the attachment. Later studies suggested a suction model based on structural changes of the ventral discs, substrate clutching or grasping, or unspecific contact forces. In this study, we aim to contribute to the understanding of G. duodenalis attachment by investigating detachment characteristics and determining adhesion forces of single trophozoites on a smooth glass surface (RMS = 1.1 ± 0.2 nm) by fluidic force microscopy (FluidFM)-based single-cell force spectroscopy (SCFS). Briefly, viable adherent trophozoites were approached with a FluidFM micropipette, immobilized to the micropipette aperture by negative pressure, and detached from the surface by micropipette retraction while retract force curves were recorded. These force curves displayed novel and so far undescribed characteristics for a microorganism, namely, gradual force increase on the pulled trophozoite, with localization of adhesion force shortly before cell detachment length. Respective adhesion forces reached 7.7 ± 4.2 nN at 1 μm s-1 pulling speed. Importantly, this unique force pattern was different from that of other eukaryotic cells such as Candida albicans or oral keratinocytes, considered for comparison in this study. The latter both displayed a force pattern with force peaks of different values or force plateaus (for keratinocytes) indicative of breakage of molecular bonds of cell-anchored classes of adhesion molecules or membrane components. Furthermore, the attachment mode of G. duodenalis trophozoites was mechanically resilient to tensile forces, when the pulling speeds were raised up to 10 μm s-1 and adhesion forces increased to 28.7 ± 10.5 nN. Taken together, comparative SCSF revealed novel and unique retract force curve characteristics for attached G. duodenalis, suggesting a ligand-independent suction mechanism, that differ from those of other well described eukaryotes.
Collapse
Affiliation(s)
- Gubesh Gunaratnam
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany.
| | - Ricarda Leisering
- Department of Infectious Diseases, Unit 16 Mycotic and Parasitic Agents and Mycobacteria, Robert Koch-Institute, Berlin, Germany
| | - Ben Wieland
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany.
| | - Johanna Dudek
- Clinic of Operative Dentistry and Periodontology, Saarland University, Homburg, Germany
| | - Nicolai Miosge
- Clinic of Operative Dentistry and Periodontology, Saarland University, Homburg, Germany
| | - Sören L Becker
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany.
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany.
| | - Scott C Dawson
- Department of Microbiology and Molecular Genetics, University of California Davis, Davis, USA
| | - Matthias Hannig
- Clinic of Operative Dentistry and Periodontology, Saarland University, Homburg, Germany
| | - Karin Jacobs
- Experimental Physics, Saarland University, Saarbrücken, Germany
- Max Planck School, Matter to Life, Heidelberg, Germany
| | - Christian Klotz
- Department of Infectious Diseases, Unit 16 Mycotic and Parasitic Agents and Mycobacteria, Robert Koch-Institute, Berlin, Germany
| | - Toni Aebischer
- Department of Infectious Diseases, Unit 16 Mycotic and Parasitic Agents and Mycobacteria, Robert Koch-Institute, Berlin, Germany
| | - Philipp Jung
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany.
| |
Collapse
|
3
|
Spengler C, Maikranz E, Glatz B, Klatt MA, Heintz H, Bischoff M, Santen L, Fery A, Jacobs K. The adhesion capability of Staphylococcus aureus cells is heterogeneously distributed over the cell envelope. Soft Matter 2024; 20:484-494. [PMID: 37842771 DOI: 10.1039/d3sm01045g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
Understanding and controlling microbial adhesion is a critical challenge in biomedical research, given the profound impact of bacterial infections on global health. Many facets of bacterial adhesion, including the distribution of adhesion forces across the cell wall, remain poorly understood. While a recent 'patchy colloid' model has shed light on adhesion in Gram-negative Escherichia coli cells, a corresponding model for Gram-positive cells has been elusive. In this study, we employ single cell force spectroscopy to investigate the adhesion force of Staphylococcus aureus. Normally, only one contact point of the entire bacterial surface is measured. However, by using a sine-shaped surface and recording force-distance curves along a path perpendicular to the rippled structures, we can characterize almost a hemisphere of one and the same bacterium. This unique approach allows us to study a greater number of contact points between the bacterium and the surface compared to conventional flat substrata. Distributed over the bacterial surface, we identify sites of higher and lower adhesion, which we call 'patchy adhesion', reminiscent of the patchy colloid model. The experimental results show that only some cells exhibit particularly strong adhesion at certain locations. To gain a better understanding of these locations, a geometric model of the bacterial cell surface was created. The experimental results were best reproduced by a model that features a few (5-6) particularly strong adhesion sites (diameter about 250 nm) that are widely distributed over the cell surface. Within the simulated patches, the number of molecules or their individual adhesive strength is increased. A more detailed comparison shows that simple geometric considerations for interacting molecules are not sufficient, but rather strong angle-dependent molecule-substratum interactions are required. We discuss the implications of our results for the development of new materials and the design and analysis of future studies.
Collapse
Affiliation(s)
- Christian Spengler
- Experimental Physics, Saarland University, Center for Biophysics, 66123 Saarbrücken, Germany.
| | - Erik Maikranz
- Theoretical Physics, Saarland University, Center for Biophysics, 66123 Saarbrücken, Germany
| | - Bernhard Glatz
- Institute of Physical Chemistry and Physics of Polymers, Leibniz Institute of Polymer Research, 01069 Dresden, Germany
| | - Michael Andreas Klatt
- Experimental Physics, Saarland University, Center for Biophysics, 66123 Saarbrücken, Germany.
- Department of Physics, Princeton University, Jadwin Hall, Princeton, NJ 08544-0001, USA
| | - Hannah Heintz
- Experimental Physics, Saarland University, Center for Biophysics, 66123 Saarbrücken, Germany.
| | - Markus Bischoff
- Insitute of Medical Microbiology and Hygiene, Saarland University, Center for Biophysics, 66421 Homburg/Saar, Germany
| | - Ludger Santen
- Theoretical Physics, Saarland University, Center for Biophysics, 66123 Saarbrücken, Germany
| | - Andreas Fery
- Institute of Physical Chemistry and Physics of Polymers, Leibniz Institute of Polymer Research, 01069 Dresden, Germany
- Physical Chemistry of Polymer Materials, Technical University Dresden, 01062 Dresden, Germany
| | - Karin Jacobs
- Experimental Physics, Saarland University, Center for Biophysics, 66123 Saarbrücken, Germany.
| |
Collapse
|
4
|
Youssouf N, Martin M, Bischoff M, Soubeyran P, Gannoun-Zaki L, Molle V. The secreted tyrosine phosphatase PtpA promotes Staphylococcus aureus survival in RAW 264.7 macrophages through decrease of the SUMOylation host response. Microbiol Spectr 2023; 11:e0281323. [PMID: 37819153 PMCID: PMC10714793 DOI: 10.1128/spectrum.02813-23] [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: 07/11/2023] [Accepted: 09/04/2023] [Indexed: 10/13/2023] Open
Abstract
IMPORTANCE Staphylococcus aureus uses numerous strategies to survive and persist in the intracellular environment of professional phagocytes, including modulation of the SUMOylation process. This study aims to understand how S. aureus alters host SUMOylation to enhance its intracellular survival in professional phagocytes. Our results indicate that S. aureus strain Newman utilizes PtpA-driven phosphorylation to decrease the amount of SUMOylated proteins in murine macrophages to facilitate its survival in this immune cell type.
Collapse
Affiliation(s)
- Nadhuma Youssouf
- VBIC, INSERM U1047, Université de Montpellier, Montpellier, France
| | - Marianne Martin
- VBIC, INSERM U1047, Université de Montpellier, Montpellier, France
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Saarland, Germany
| | - Philippe Soubeyran
- Centre de Recherche en Cancérologie de Marseille (CRCM), INSERM U1068, CNRS UMR, Aix-Marseille, Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, France
| | | | - Virginie Molle
- VBIC, INSERM U1047, Université de Montpellier, Montpellier, France
| |
Collapse
|
5
|
Witek K, Kaczor A, Żesławska E, Podlewska S, Marć MA, Czarnota-Łydka K, Nitek W, Latacz G, Tejchman W, Bischoff M, Jacob C, Handzlik J. Chalcogen-Varied Imidazolone Derivatives as Antibiotic Resistance Breakers in Staphylococcus aureus Strains. Antibiotics (Basel) 2023; 12:1618. [PMID: 37998820 PMCID: PMC10669504 DOI: 10.3390/antibiotics12111618] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 09/25/2023] [Accepted: 11/06/2023] [Indexed: 11/25/2023] Open
Abstract
In this study, a search for new therapeutic agents that may improve the antibacterial activity of conventional antibiotics and help to successfully overcome methicillin-resistant Staphylococcus aureus (MRSA) infections has been conducted. The purpose of this work was to extend the scope of our preliminary studies and to evaluate the adjuvant potency of new derivatives in a set of S. aureus clinical isolates. The study confirmed the high efficacy of piperazine derivatives of 5-arylideneimidazol-4-one (7-9) tested previously, and it enabled the authors to identify even more efficient modulators of bacterial resistance among new analogs. The greatest capacity to enhance oxacillin activity was determined for 1-benzhydrylpiperazine 5-spirofluorenehydantoin derivative (13) which, at concentrations as low as 0.0625 mM, restores the effectiveness of β-lactam antibiotics against MRSA strains. In silico studies showed that the probable mechanism of action of 13 is related to the binding of the molecule with the allosteric site of PBP2a. Interestingly, thiazole derivatives tested were shown to act as both oxacillin and erythromycin conjugators in S. aureus isolates, suggesting a complex mode of action (i.e., influence on the Msr(A) efflux pump). This high enhancer activity indicates the high potential of imidazolones to become commercially available antibiotic adjuvants.
Collapse
Affiliation(s)
- Karolina Witek
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland; (K.W.); (A.K.); (S.P.); (M.A.M.); (K.C.-Ł.); (G.L.)
- Department of Pharmaceutical Microbiology, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland
- Bioorganic Chemistry, School of Pharmacy, University of Saarland, Campus B2.1, D-66123 Saarbrüecken, Germany;
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg, Germany;
| | - Aneta Kaczor
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland; (K.W.); (A.K.); (S.P.); (M.A.M.); (K.C.-Ł.); (G.L.)
| | - Ewa Żesławska
- Institute of Biology and Earth Sciences, Pedagogical University of Krakow, Podchorążych 2, 30-084 Krakow, Poland; (E.Ż.); (W.T.)
| | - Sabina Podlewska
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland; (K.W.); (A.K.); (S.P.); (M.A.M.); (K.C.-Ł.); (G.L.)
- Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343 Krakow, Poland
| | - Małgorzata Anna Marć
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland; (K.W.); (A.K.); (S.P.); (M.A.M.); (K.C.-Ł.); (G.L.)
| | - Kinga Czarnota-Łydka
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland; (K.W.); (A.K.); (S.P.); (M.A.M.); (K.C.-Ł.); (G.L.)
- Doctoral School of Medical and Health Sciences, Jagiellonian University Medical College, Św. Łazarza 15, 31-530 Krakow, Poland
| | - Wojciech Nitek
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland;
| | - Gniewomir Latacz
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland; (K.W.); (A.K.); (S.P.); (M.A.M.); (K.C.-Ł.); (G.L.)
| | - Waldemar Tejchman
- Institute of Biology and Earth Sciences, Pedagogical University of Krakow, Podchorążych 2, 30-084 Krakow, Poland; (E.Ż.); (W.T.)
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg, Germany;
| | - Claus Jacob
- Bioorganic Chemistry, School of Pharmacy, University of Saarland, Campus B2.1, D-66123 Saarbrüecken, Germany;
| | - Jadwiga Handzlik
- Department of Technology and Biotechnology of Drugs, Jagiellonian University Medical College, Medyczna 9, 30-688 Krakow, Poland; (K.W.); (A.K.); (S.P.); (M.A.M.); (K.C.-Ł.); (G.L.)
| |
Collapse
|
6
|
Abdrabou AMM, Sy I, Bischoff M, Arroyo MJ, Becker SL, Mellmann A, von Müller L, Gärtner B, Berger FK. Discrimination between hypervirulent and non-hypervirulent ribotypes of Clostridioides difficile by MALDI-TOF mass spectrometry and machine learning. Eur J Clin Microbiol Infect Dis 2023; 42:1373-1381. [PMID: 37721704 PMCID: PMC10587247 DOI: 10.1007/s10096-023-04665-y] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 09/03/2023] [Indexed: 09/19/2023]
Abstract
Hypervirulent ribotypes (HVRTs) of Clostridioides difficile such as ribotype (RT) 027 are epidemiologically important. This study evaluated whether MALDI-TOF can distinguish between strains of HVRTs and non-HVRTs commonly found in Europe. Obtained spectra of clinical C. difficile isolates (training set, 157 isolates) covering epidemiologically relevant HVRTs and non-HVRTs found in Europe were used as an input for different machine learning (ML) models. Another 83 isolates were used as a validation set. Direct comparison of MALDI-TOF spectra obtained from HVRTs and non-HVRTs did not allow to discriminate between these two groups, while using these spectra with certain ML models could differentiate HVRTs from non-HVRTs with an accuracy >95% and allowed for a sub-clustering of three HVRT subgroups (RT027/RT176, RT023, RT045/078/126/127). MALDI-TOF combined with ML represents a reliable tool for rapid identification of major European HVRTs.
Collapse
Affiliation(s)
- Ahmed Mohamed Mostafa Abdrabou
- Institute of Medical Microbiology and Hygiene, Saarland University, Kirrberger Straße 100, Building 43, D-66421, Homburg, Saar, Germany.
- Medical Microbiology and Immunology Department, Faculty of Medicine, Mansoura University, El Gomhouria Street, Mansoura, 35516, Egypt.
- National Reference Center for Clostridioides (Clostridium) difficile, Homburg-Münster-Coesfeld, Germany.
| | - Issa Sy
- Institute of Medical Microbiology and Hygiene, Saarland University, Kirrberger Straße 100, Building 43, D-66421, Homburg, Saar, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, Kirrberger Straße 100, Building 43, D-66421, Homburg, Saar, Germany
- National Reference Center for Clostridioides (Clostridium) difficile, Homburg-Münster-Coesfeld, Germany
| | - Manuel J Arroyo
- Clover Bioanalytical Software, Av. del Conocimiento, 41, 18016, Granada, Spain
| | - Sören L Becker
- Institute of Medical Microbiology and Hygiene, Saarland University, Kirrberger Straße 100, Building 43, D-66421, Homburg, Saar, Germany
| | - Alexander Mellmann
- National Reference Center for Clostridioides (Clostridium) difficile, Homburg-Münster-Coesfeld, Germany
- Institute of Hygiene, University of Münster, Robert-Koch-Straße 41, 48149, Münster, Germany
| | - Lutz von Müller
- National Reference Center for Clostridioides (Clostridium) difficile, Homburg-Münster-Coesfeld, Germany
- Christophorus Kliniken Coesfeld, Coesfeld, Germany
| | - Barbara Gärtner
- Institute of Medical Microbiology and Hygiene, Saarland University, Kirrberger Straße 100, Building 43, D-66421, Homburg, Saar, Germany
- National Reference Center for Clostridioides (Clostridium) difficile, Homburg-Münster-Coesfeld, Germany
| | - Fabian K Berger
- Institute of Medical Microbiology and Hygiene, Saarland University, Kirrberger Straße 100, Building 43, D-66421, Homburg, Saar, Germany
- National Reference Center for Clostridioides (Clostridium) difficile, Homburg-Münster-Coesfeld, Germany
| |
Collapse
|
7
|
Leidecker M, Bertling A, Hussain M, Bischoff M, Eble JA, Fender AC, Jurk K, Rumpf C, Herrmann M, Kehrel BE, Niemann S. Protein Disulfide Isomerase and Extracellular Adherence Protein Cooperatively Potentiate Staphylococcal Invasion into Endothelial Cells. Microbiol Spectr 2023; 11:e0388622. [PMID: 36995240 PMCID: PMC10269700 DOI: 10.1128/spectrum.03886-22] [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: 09/26/2022] [Accepted: 03/09/2023] [Indexed: 03/31/2023] Open
Abstract
Invasion of host cells is an important feature of Staphylococcus aureus. The main internalization pathway involves binding of the bacteria to host cells, e.g., endothelial cells, via a fibronectin (Fn) bridge between S. aureus Fn binding proteins and α5β1-integrin, followed by phagocytosis. The secreted extracellular adherence protein (Eap) has been shown to promote this cellular uptake pathway of not only S. aureus, but also of bacteria otherwise poorly taken up by host cells, such as Staphylococcus carnosus. The exact mechanisms are still unknown. Previously, we demonstrated that Eap induces platelet activation by stimulation of the protein disulfide isomerase (PDI), a catalyst of thiol-disulfide exchange reactions. Here, we show that Eap promotes PDI activity on the surface of endothelial cells, and that this contributes critically to Eap-driven staphylococcal invasion. PDI-stimulated β1-integrin activation followed by increased Fn binding to host cells likely accounts for the Eap-enhanced uptake of S. aureus into non-professional phagocytes. Additionally, Eap supports the binding of S. carnosus to Fn-α5β1 integrin, thereby allowing its uptake into endothelial cells. To our knowledge, this is the first demonstration that PDI is crucial for the uptake of bacteria into host cells. We describe a hitherto unknown function of Eap-the promotion of an enzymatic activity with subsequent enhancement of bacterial uptake-and thus broaden mechanistic insights into its importance as a driver of bacterial pathogenicity. IMPORTANCE Staphylococcus aureus can invade and persist in non-professional phagocytes, thereby escaping host defense mechanisms and antibiotic treatment. The intracellular lifestyle of S. aureus contributes to the development of infection, e.g., in infective endocarditis or chronic osteomyelitis. The extracellular adherence protein secreted by S. aureus promotes its own internalization as well as that of bacteria that are otherwise poorly taken up by host cells, such as Staphylococcus carnosus. In our study, we demonstrate that staphylococcal uptake by endothelial cells requires catalytic disulfide exchange activity by the cell-surface protein disulfide isomerase, and that this critical enzymatic function is enhanced by Eap. The therapeutic application of PDI inhibitors has previously been investigated in the context of thrombosis and hypercoagulability. Our results add another intriguing possibility: therapeutically targeting PDI, i.e., as a candidate approach to modulate the initiation and/or course of S. aureus infectious diseases.
Collapse
Affiliation(s)
- Marleen Leidecker
- Institute of Medical Microbiology, University Hospital of Münster, Münster, Germany
| | - Anne Bertling
- Department of Anaesthesiology and Intensive Care, Experimental and Clinical Haemostasis, University Hospital of Münster, Münster, Germany
| | - Muzaffar Hussain
- Institute of Medical Microbiology, University Hospital of Münster, Münster, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Johannes A. Eble
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Münster, Germany
| | - Anke C. Fender
- Department of Anaesthesiology and Intensive Care, Experimental and Clinical Haemostasis, University Hospital of Münster, Münster, Germany
- Institute of Pharmacology, University Hospital Essen, Essen, Germany
| | - Kerstin Jurk
- Department of Anaesthesiology and Intensive Care, Experimental and Clinical Haemostasis, University Hospital of Münster, Münster, Germany
- Center for Thrombosis and Hemostasis, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Christine Rumpf
- Institute of Medical Microbiology, University Hospital of Münster, Münster, Germany
| | - Mathias Herrmann
- Institute of Medical Microbiology, University Hospital of Münster, Münster, Germany
| | - Beate E. Kehrel
- Department of Anaesthesiology and Intensive Care, Experimental and Clinical Haemostasis, University Hospital of Münster, Münster, Germany
| | - Silke Niemann
- Institute of Medical Microbiology, University Hospital of Münster, Münster, Germany
| |
Collapse
|
8
|
Englisch CN, Wadood NA, Pätzold L, Gallagher A, Krasteva-Christ G, Becker SL, Bischoff M. Establishing an Experimental Pseudomonas aeruginosa Keratitis Model in Mice - Challenges and Solutions. Ann Anat 2023; 249:152099. [PMID: 37105406 DOI: 10.1016/j.aanat.2023.152099] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 04/29/2023]
Abstract
BACKGROUND With the ongoing increase in antimicrobial resistances seen in bacterial isolates causing a keratitis in humans, animal models have become an important tool to study new antimicrobial therapies. Nevertheless, the establishment of experimental keratitis is difficult. Here, we discuss the impact of different arrangements, including animal age, bacterial strain and dose as well as epithelium removal on the outcome of experimental keratitis. We therefore present the methods and results of our establishing experiments. METHODS Bacterial load determination and flow cytometry were performed using eye homogenate gained from a 72hours lasting murine Pseudomonas aeruginosa keratitis model. Additionally, the intensity of the infection was scored from 0 to 5, the mice weighed, and blood immune cells counted. RESULTS We found that older C57BL/6N mice (8-11 months) are more susceptible to develop a keratitis than younger mice (5-6 weeks). Epithelium removal has no major impact on infectivity and disease progression in aged mice. P. aeruginosa exoU+ strains, such as PA54, should preferentially be used and highly concentrated (∼ 5×107 CFU). Establishing an infection with the exoU- PAO1 derivative DSM 19880 was not possible. CONCLUSIONS We present a replicable method to achieve a successful experimental P. aeruginosa keratitis in C57BL/6N mice that is sustained or aggravated over the observation period of 3 days in 80% of all animals tested. Our work is of particular interest to all researchers planning the establishment of such experimental models. We show some key aspects that can simplify and quicken the procedure, ultimately saving costs and animal life.
Collapse
Affiliation(s)
- Colya N Englisch
- Institute for Medical Microbiology and Hygienics, Saarland University, 66421, Homburg/Saar, Germany.
| | - Noran Abdel Wadood
- Institute for Medical Microbiology and Hygienics, Saarland University, 66421, Homburg/Saar, Germany; Institute of Anatomy and Cell Biology, Saarland University, 66421, Homburg/Saar, Germany.
| | - Linda Pätzold
- Institute for Medical Microbiology and Hygienics, Saarland University, 66421, Homburg/Saar, Germany.
| | | | | | - Sören L Becker
- Institute for Medical Microbiology and Hygienics, Saarland University, 66421, Homburg/Saar, Germany.
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygienics, Saarland University, 66421, Homburg/Saar, Germany.
| |
Collapse
|
9
|
Salzmann M, Platzer H, Mussbacher M, Derler M, Lenz M, Haider P, Brekalo M, Kral-Pointner JB, Kastl S, Speidl WS, Preissner KT, Schubert U, Bischoff M, Uhrin P, Wojta J, Hohensinner PJ. Staphylococcus aureus extracellular adherence protein (Eap) reduces immune cell phenotype in developing but not in established atherosclerotic lesions. Biochim Biophys Acta Mol Basis Dis 2023; 1869:166616. [PMID: 36513287 DOI: 10.1016/j.bbadis.2022.166616] [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: 08/23/2022] [Revised: 11/15/2022] [Accepted: 11/28/2022] [Indexed: 12/14/2022]
Abstract
Atherosclerosis is a chronic, inflammatory disease of the vessel wall where triggered immune cells bind to inflamed endothelium, extravasate and sustain local inflammation. Leukocyte adhesion and extravasation are mediated by adhesion molecules expressed by activated endothelial cells, like intercellular adhesion molecule 1 (ICAM-1). Extracellular adherence protein (Eap) from Staphylococcus aureus binds to a plethora of extracellular matrix proteins, including ICAM-1 and its ligands macrophage-1 antigen (Mac-1, αMβ2) and lymphocyte function-associated antigen 1 (LFA-1, αLβ2), thereby disrupting the interaction between leukocytes and endothelial cells. We aimed to use Eap to inhibit the interaction of leukocytes with activated endothelial cells in settings of developing and established atherosclerosis in apolipoprotein E (ApoE) deficient mice on high-fat diet. In developing atherosclerosis, Eap treatment reduced circulating platelet-neutrophil aggregates as well as infiltration of T cells and neutrophils into the growing plaque, accompanied by reduced formation of neutrophil extracellular traps (NETs). However, plaque size did not change. Intervention treatment with Eap of already established plaques did not result in cellular or morphological plaque changes, whereas T cell infiltration was increased and thereby again modulated by Eap. We conclude that although Eap leads to cellular changes in developing plaques, clinical implications might be limited as patients are usually treated at a more advanced stage of disease progression. Hence, usage of Eap might be an interesting mechanistic tool for cellular infiltration during plaque development in basic research but not a clinical target.
Collapse
Affiliation(s)
- Manuel Salzmann
- Department of Internal Medicine II/Division of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria; Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Guertel 18-20, 1090 Vienna, Austria.
| | - Harald Platzer
- Department of Internal Medicine II/Division of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria.
| | - Marion Mussbacher
- Department of Pharmacology and Toxicology, University of Graz, Humboldtstraße 46, 8010 Graz, Austria.
| | - Martina Derler
- Department of Pharmacology and Toxicology, University of Graz, Humboldtstraße 46, 8010 Graz, Austria.
| | - Max Lenz
- Department of Internal Medicine II/Division of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria.
| | - Patrick Haider
- Department of Internal Medicine II/Division of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria.
| | - Mira Brekalo
- Department of Internal Medicine II/Division of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria.
| | - Julia B Kral-Pointner
- Department of Internal Medicine II/Division of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria; Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Guertel 18-20, 1090 Vienna, Austria.
| | - Stefan Kastl
- Department of Internal Medicine II/Division of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria.
| | - Walter S Speidl
- Department of Internal Medicine II/Division of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria; Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Guertel 18-20, 1090 Vienna, Austria.
| | - Klaus T Preissner
- Department of Cardiology, Kerckhoff Heart Research Institute, Justus-Liebig-University, Aulweg 129, 35392 Giessen, Germany; Department of Biochemistry, Medical Faculty, Justus-Liebig-University, Friedrichstrasse 24, 35392 Giessen, Germany.
| | - Uwe Schubert
- Department of Biochemistry, Medical Faculty, Justus-Liebig-University, Friedrichstrasse 24, 35392 Giessen, Germany.
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, Kirrberger Straße 100, 66424 Homburg, Germany.
| | - Pavel Uhrin
- Center for Physiology and Pharmacology, Schwarzspanierstraße 17A, 1090 Vienna, Austria.
| | - Johann Wojta
- Department of Internal Medicine II/Division of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria; Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Guertel 18-20, 1090 Vienna, Austria.
| | - Philipp J Hohensinner
- Ludwig Boltzmann Institute for Cardiovascular Research, Waehringer Guertel 18-20, 1090 Vienna, Austria; Center for Biomedical Research, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria.
| |
Collapse
|
10
|
Huber C, Wolf SA, Ziebuhr W, Holmes MA, Assmann J, Lübke-Becker A, Thürmer A, Semmler T, Brombach J, Bethe A, Bischoff M, Wieler LH, Epping L, Walther B. How to survive pig farming: Mechanism of SCC mec element deletion and metabolic stress adaptation in livestock-associated MRSA. Front Microbiol 2022; 13:969961. [PMID: 36504815 PMCID: PMC9728531 DOI: 10.3389/fmicb.2022.969961] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 10/04/2022] [Indexed: 11/24/2022] Open
Abstract
Previous research on methicillin susceptible Staphylococcus aureus (MSSA) belonging to livestock-associated (LA-) sequence type (ST) 398, isolated from pigs and their local surroundings, indicated that differences between these MSSA and their methicillin resistant predecessors (MRSA) are often limited to the absence of the staphylococcal cassette chromosome mec (SCCmec) and few single nucleotide polymorphisms. So far, our understanding on how LA-MRSA endure the environmental conditions associated with pig-farming as well as the putative impact of this particular environment on the mobilisation of SCCmec elements is limited. Thus, we performed in-depth genomic and transcriptomic analyses using the LA-MRSA ST398 strain IMT38951 and its methicillin susceptible descendant. We identified a mosaic-structured SCCmec region including a putative replicative SCCmecVc which is absent from the MSSA chromosome through homologous recombination. Based on our data, such events occur between short repetitive sequences identified within and adjacent to two distinct alleles of the large cassette recombinase genes C (ccrC). We further evaluated the global transcriptomic response of MRSA ST398 to particular pig-farm associated conditions, i.e., contact with host proteins (porcine serum) and a high ammonia concentration. Differential expression of global regulators involved in stress response control were identified, i.e., ammonia-induced alternative sigma factor B-depending activation of genes for the alkaline shock protein 23, the heat shock response and the accessory gene regulator (agr)-controlled transcription of virulence factors. Exposure to serum transiently induced the transcription of distinct virulence factor encoding genes. Transcription of genes reported for mediating the loss of methicillin resistance, especially ccrC, was not significantly different compared to the unchallenged controls. We concluded that, from an evolutionary perspective, bacteria may save energy by incidentally dismissing a fully replicative SCCmec element in contrast to the induction of ccr genes on a population scale. Since the genomic SCCmec integration site is a hot-spot of recombination, occasional losses of elements of 16 kb size may restore capacities for the uptake of foreign genetic material. Subsequent spread of resistance, on the other hand, might depend on the autonomous replication machinery of the deleted SCCmec elements that probably enhance chances for reintegration of SCCmec into susceptible genomes by mere multiplication.
Collapse
Affiliation(s)
- Charlotte Huber
- Advanced Light and Electron Microscopy (ZBS4), Robert Koch Institute, Berlin, Germany
| | - Silver A. Wolf
- Genome Sequencing and Genomic Epidemiology (MF2), Robert Koch Institute, Berlin, Germany
| | - Wilma Ziebuhr
- Institute for Molecular Infection Biology, University of Würzburg, Würzburg, Germany
| | - Mark A. Holmes
- Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Julia Assmann
- Advanced Light and Electron Microscopy (ZBS4), Robert Koch Institute, Berlin, Germany
| | - Antina Lübke-Becker
- Institute of Microbiology and Epizootics, Freie Universität Berlin, Berlin, Germany
| | - Andrea Thürmer
- Genome Sequencing and Genomic Epidemiology (MF2), Robert Koch Institute, Berlin, Germany
| | - Torsten Semmler
- Genome Sequencing and Genomic Epidemiology (MF2), Robert Koch Institute, Berlin, Germany
| | - Julian Brombach
- Institute of Microbiology and Epizootics, Freie Universität Berlin, Berlin, Germany
| | - Astrid Bethe
- Institute of Microbiology and Epizootics, Freie Universität Berlin, Berlin, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Lothar H. Wieler
- Methodology and Research Infrastructure, Robert Koch Institute, Berlin, Germany
| | - Lennard Epping
- Genome Sequencing and Genomic Epidemiology (MF2), Robert Koch Institute, Berlin, Germany
| | - Birgit Walther
- Advanced Light and Electron Microscopy (ZBS4), Robert Koch Institute, Berlin, Germany,*Correspondence: Birgit Walther,
| |
Collapse
|
11
|
Olunoiki E, Rehner J, Bischoff M, Koshel E, Vogt T, Reichrath J, Becker SL. Characteristics of the Skin Microbiome in Selected Dermatological Conditions: A Narrative Review. Life (Basel) 2022; 12:life12091420. [PMID: 36143456 PMCID: PMC9503882 DOI: 10.3390/life12091420] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 08/29/2022] [Accepted: 09/05/2022] [Indexed: 11/29/2022] Open
Abstract
The skin is the largest and outermost organ of the human body. The microbial diversity of the skin can be influenced by several variable factors such as physiological state, lifestyle, and geographical locations. Recent years have seen increased interest in research aiming at an improved understanding of the relationship between the human microbiota and several diseases. Albeit understudied, interesting correlations between the skin microbiota and several dermatological conditions have been observed. Studies have shown that a decrease or increase in the abundance of certain microbial communities can be implicated in several dermatological pathologies. This narrative review (i) examines the role of the skin microbiota in the maintenance of skin homeostasis and health, (ii) provides examples on how some common skin diseases (acne inversa, candidiasis, psoriasis) are associated with the dysbiosis of microbial communities, and (iii) describes how recent research approaches used in skin microbiome studies may lead to improved, more sensitive diagnostics and individual therapeutics in the foreseeable future.
Collapse
Affiliation(s)
- Esther Olunoiki
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany
- “Solution Chemistry of Advanced Materials and Technologies” (SCAMT) Institute, ITMO University, 191002 St. Petersburg, Russia
| | - Jacqueline Rehner
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany
| | - Elena Koshel
- “Solution Chemistry of Advanced Materials and Technologies” (SCAMT) Institute, ITMO University, 191002 St. Petersburg, Russia
| | - Thomas Vogt
- Department of Dermatology, Venereology, Allergology, Saarland University Medical Center, 66421 Homburg, Germany
| | - Jörg Reichrath
- Department of Dermatology, Venereology, Allergology, Saarland University Medical Center, 66421 Homburg, Germany
| | - Sören L. Becker
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany
- Correspondence: ; Tel.: +49-6841-16-23900
| |
Collapse
|
12
|
Muthukumar V, Shi L, Chai N, Langenbucher A, Becker SL, Seitz B, Orosz E, Stachon T, Kiderlen AF, Bischoff M, Szentmáry N. Efficacy of Off-Label Anti-Amoebic Agents to Suppress Trophozoite Formation of Acanthamoeba spp. on Non-Nutrient Agar Escherichia Coli Plates. Microorganisms 2022; 10:microorganisms10081642. [PMID: 36014060 PMCID: PMC9412465 DOI: 10.3390/microorganisms10081642] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/09/2022] [Accepted: 08/10/2022] [Indexed: 11/19/2022] Open
Abstract
Acanthamoeba keratitis (AK) is a dangerous infectious disease, which is associated with a high risk of blindness for the infected patient, and for which no standard therapy exists thus far. Patients suffering from AK are thus treated, out of necessity, with an off-label therapy, using drugs designed and indicated for other diseases/purposes. Here, we tested the capability of the off-label anti-amoebic drugs chlorhexidine (CH; 0.1%), dibromopropamidine diisethionate (DD; 0.1%), hexamidine diisethionate (HD; 0.1%), miltefosine (MF; 0.0065%), natamycin (NM; 5%), polyhexamethylene biguanide (PHMB; 0.02%), povidone iodine (PVPI; 1%), and propamidine isethionate (PD; 0.1%) to suppress trophozoite formation of Acantamoeba castellanii and Acanthamoeba hatchetti cysts on non-nutrient agar Escherichia coli plates. Of the eight off-label anti-amoebic drugs tested, only PVPI allowed for a complete suppression of trophozoite formation by drug-challenged cysts for all four Acanthamoeba isolates in all five biological replicates. Drugs such as NM, PD, and PHMB repeatedly suppressed trophozoite formation with some, but not all, tested Acanthamoeba isolates, while other drugs such as CH, DD, and MF failed to exert a relevant effect on the excystation capacities of the tested Acanthamoeba isolates in most, if not all, of our repetitions. Our findings suggest that pre-testing of the AK isolate with the non-nutrient agar E. coli plate assay against the anti-amoebic drug intended for treatment should be performed to confirm that the selected drug is cysticidal for the Acanthamoeba isolate.
Collapse
Affiliation(s)
- Vithusan Muthukumar
- Institute for Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, 66421 Homburg, Germany
| | - Lei Shi
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, 66421 Homburg, Germany
- Division of Life Science and Medicine, University of Science and Technology of China, Hefei 230026, China
| | - Ning Chai
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, 66421 Homburg, Germany
| | | | - Sören L. Becker
- Institute for Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany
| | - Berthold Seitz
- Department of Ophthalmology, Saarland University Medical Center, 66421 Homburg, Germany
| | - Erika Orosz
- Department of Parasitology, National Public Health Center, 1097 Budapest, Hungary
| | - Tanja Stachon
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, 66421 Homburg, Germany
| | - Albrecht F. Kiderlen
- Division for Mycotic and Parasitic Agents and Mycobacteria, Robert Koch Institute, 13353 Berlin, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany
- Correspondence: (M.B.); (N.S.); Tel.: +49-6841-162-3963 (M.B.); +49-6841-162-1217 (N.S.)
| | - Nóra Szentmáry
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, 66421 Homburg, Germany
- Correspondence: (M.B.); (N.S.); Tel.: +49-6841-162-3963 (M.B.); +49-6841-162-1217 (N.S.)
| |
Collapse
|
13
|
Fichtner UA, Bischoff M, Maiwald P, Sehlbrede M, Tinsel I, Farin-Glattacker E. Evaluation des TK-Onlinecoaches zur Gewichtsreduktion – eine
randomisierte kontrollierte Studie. Das Gesundheitswesen 2022. [DOI: 10.1055/s-0042-1753763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- UA Fichtner
- Albert-Ludwigs-Universität
Freiburg/Universitätsklinikum Freiburg, Institut für
medizinische Biometrie und Statistik/Sektion Versorgungsforschung und
Rehabilitationsforschung, Freiburg im Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Sportpsychologie, Freiburg im
Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Ernährung, Freiburg im
Breisgau, Deutschland
- Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg,
Deutschland
| | - M Bischoff
- Albert-Ludwigs-Universität
Freiburg/Universitätsklinikum Freiburg, Institut für
medizinische Biometrie und Statistik/Sektion Versorgungsforschung und
Rehabilitationsforschung, Freiburg im Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Sportpsychologie, Freiburg im
Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Ernährung, Freiburg im
Breisgau, Deutschland
- Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg,
Deutschland
| | - P Maiwald
- Albert-Ludwigs-Universität
Freiburg/Universitätsklinikum Freiburg, Institut für
medizinische Biometrie und Statistik/Sektion Versorgungsforschung und
Rehabilitationsforschung, Freiburg im Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Sportpsychologie, Freiburg im
Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Ernährung, Freiburg im
Breisgau, Deutschland
- Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg,
Deutschland
| | - M Sehlbrede
- Albert-Ludwigs-Universität
Freiburg/Universitätsklinikum Freiburg, Institut für
medizinische Biometrie und Statistik/Sektion Versorgungsforschung und
Rehabilitationsforschung, Freiburg im Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Sportpsychologie, Freiburg im
Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Ernährung, Freiburg im
Breisgau, Deutschland
- Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg,
Deutschland
| | - I Tinsel
- Albert-Ludwigs-Universität
Freiburg/Universitätsklinikum Freiburg, Institut für
medizinische Biometrie und Statistik/Sektion Versorgungsforschung und
Rehabilitationsforschung, Freiburg im Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Sportpsychologie, Freiburg im
Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Ernährung, Freiburg im
Breisgau, Deutschland
- Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg,
Deutschland
| | - E Farin-Glattacker
- Albert-Ludwigs-Universität
Freiburg/Universitätsklinikum Freiburg, Institut für
medizinische Biometrie und Statistik/Sektion Versorgungsforschung und
Rehabilitationsforschung, Freiburg im Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Sportpsychologie, Freiburg im
Breisgau, Deutschland
- Albert-Ludwigs-Universität Freiburg, Institut für Sport
und Sportwissenschaft/Arbeitsbereich Ernährung, Freiburg im
Breisgau, Deutschland
- Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg,
Deutschland
| |
Collapse
|
14
|
Hofer W, Oueis E, Fayad AA, Deschner F, Andreas A, de Carvalho LP, Hüttel S, Bernecker S, Pätzold L, Morgenstern B, Zaburannyi N, Bischoff M, Stadler M, Held J, Herrmann J, Müller R. Regio‐ and Stereoselective Epoxidation and Acidic Epoxide Opening of Antibacterial and Antiplasmodial Chlorotonils Yield Highly Potent Derivatives. Angew Chem Int Ed Engl 2022; 61:e202202816. [PMID: 35485800 PMCID: PMC9400904 DOI: 10.1002/anie.202202816] [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: 02/21/2022] [Indexed: 11/12/2022]
Abstract
The rise of antimicrobial resistance poses a severe threat to public health. The natural product chlorotonil was identified as a new antibiotic targeting multidrug resistant Gram‐positive pathogens and Plasmodium falciparum. Although chlorotonil shows promising activities, the scaffold is highly lipophilic and displays potential biological instabilities. Therefore, we strived towards improving its pharmaceutical properties by semisynthesis. We demonstrated stereoselective epoxidation of chlorotonils and epoxide ring opening in moderate to good yields providing derivatives with significantly enhanced solubility. Furthermore, in vivo stability of the derivatives was improved while retaining their nanomolar activity against critical human pathogens (e.g. methicillin‐resistant Staphylococcus aureus and P. falciparum). Intriguingly, we showed further superb activity for the frontrunner molecule in a mouse model of S. aureus infection.
Collapse
Affiliation(s)
- Walter Hofer
- Microbial Natural Products Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1 66123 Saarbrücken Germany
- German Centre for Infection Research (DZIF) Braunschweig Germany
| | - Emilia Oueis
- Microbial Natural Products Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1 66123 Saarbrücken Germany
- Department of Chemistry Khalifa University of Science and Technology 127788 Abu Dhabi United Arab Emirates
- American University of Beirut Faculty of Medicine DTS Bldg, Second Floor, Room 215-B Beirut Lebanon
| | - Antoine Abou Fayad
- Microbial Natural Products Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1 66123 Saarbrücken Germany
- Department of Experimental Pathology Immunology and Microbiology Center for Infectious Disease Research (CIDR) WHO Collaborating Center for Reference and Research on Bacterial Pathogens American University of Beirut Faculty of Medicine DTS Bldg, Second Floor, Room 215-B Beirut Lebanon
| | - Felix Deschner
- Microbial Natural Products Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1 66123 Saarbrücken Germany
- German Centre for Infection Research (DZIF) Braunschweig Germany
| | - Anastasia Andreas
- Microbial Natural Products Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1 66123 Saarbrücken Germany
- German Centre for Infection Research (DZIF) Braunschweig Germany
| | - Laìs Pessanha de Carvalho
- German Centre for Infection Research (DZIF) Braunschweig Germany
- Institute of Tropical Medicine Eberhard Karls University Tübingen Wilhelmstraße 27 72074 Tübingen Germany
| | - Stephan Hüttel
- German Centre for Infection Research (DZIF) Braunschweig Germany
- Microbial Drugs Helmholtz Centre for Infection Research (HZI) Inhoffenstraße 7 38124 Braunschweig Germany
| | - Steffen Bernecker
- Microbial Drugs Helmholtz Centre for Infection Research (HZI) Inhoffenstraße 7 38124 Braunschweig Germany
| | - Linda Pätzold
- Institute for Medical Microbiology and Hygiene Saarland University 66421 Homburg Germany
| | - Bernd Morgenstern
- Inorganic Solid State Chemistry Saarland University Campus 66123 Saarbrücken Germany
| | - Nestor Zaburannyi
- Microbial Natural Products Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1 66123 Saarbrücken Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene Saarland University 66421 Homburg Germany
| | - Marc Stadler
- German Centre for Infection Research (DZIF) Braunschweig Germany
- Microbial Drugs Helmholtz Centre for Infection Research (HZI) Inhoffenstraße 7 38124 Braunschweig Germany
| | - Jana Held
- German Centre for Infection Research (DZIF) Braunschweig Germany
- Institute of Tropical Medicine Eberhard Karls University Tübingen Wilhelmstraße 27 72074 Tübingen Germany
- Centre de Recherches Médicales de Lambaréné Lambaréné Gabon
| | - Jennifer Herrmann
- Microbial Natural Products Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1 66123 Saarbrücken Germany
- German Centre for Infection Research (DZIF) Braunschweig Germany
| | - Rolf Müller
- Microbial Natural Products Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy at Saarland University Campus Building E8.1 66123 Saarbrücken Germany
- German Centre for Infection Research (DZIF) Braunschweig Germany
| |
Collapse
|
15
|
Hollenhorst MI, Nandigama R, Evers SB, Gamayun I, Abdel Wadood N, Salah A, Pieper M, Wyatt A, Stukalov A, Gebhardt A, Nadolni W, Burow W, Herr C, Beisswenger C, Kusumakshi S, Ectors F, Kichko TI, Hübner L, Reeh P, Munder A, Wienhold SM, Witzenrath M, Bals R, Flockerzi V, Gudermann T, Bischoff M, Lipp P, Zierler S, Chubanov V, Pichlmair A, König P, Boehm U, Krasteva-Christ G. Bitter taste signaling in tracheal epithelial brush cells elicits innate immune responses to bacterial infection. J Clin Invest 2022; 132:150951. [PMID: 35503420 PMCID: PMC9246383 DOI: 10.1172/jci150951] [Citation(s) in RCA: 3] [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: 04/28/2021] [Accepted: 04/29/2022] [Indexed: 11/17/2022] Open
Abstract
Constant exposure of the airways to inhaled pathogens requires efficient early immune responses protecting against infections. How bacteria on the epithelial surface are detected and first-line protective mechanisms are initiated are not well understood. We have recently shown that tracheal brush cells (BCs) express functional taste receptors. Here we report that bitter taste signaling in murine BCs induces neurogenic inflammation. We demonstrate that BC signaling stimulates adjacent sensory nerve endings in the trachea to release the neuropeptides CGRP and substance P that mediate plasma extravasation, neutrophil recruitment, and diapedesis. Moreover, we show that bitter tasting quorum-sensing molecules from Pseudomonas aeruginosa activate tracheal BCs. BC signaling depends on the key taste transduction gene Trpm5, triggers secretion of immune mediators, among them the most abundant member of the complement system, and is needed to combat P. aeruginosa infections. Our data provide functional insight into first-line defense mechanisms against bacterial infections of the lung.
Collapse
Affiliation(s)
| | - Rajender Nandigama
- Institute of Anatomy and Cell Biology, Julius-Maximilians-University, Würzburg, Germany
| | - Saskia B Evers
- Institute of Anatomy and Cell Biology, Saarland University, Homburg, Germany
| | - Igor Gamayun
- Institute for Experimental and Clinical Pharmacology and Toxicology, Saarland University, Homburg, Germany
| | - Noran Abdel Wadood
- Institute of Anatomy and Cell Biology, Saarland University, Homburg, Germany
| | - Alaa Salah
- Institute of Anatomy and Cell Biology, Saarland University, Homburg, Germany
| | - Mario Pieper
- Institute of Anatomy, University of Luebeck, Luebeck, Germany
| | - Amanda Wyatt
- Institute for Experimental and Clinical Pharmacology and Toxicology, Saarland University, Homburg, Germany
| | - Alexey Stukalov
- Immunopathology of Virus Infection Laboratory, Institute of Virology, Technical University of Munich, Munich, Germany
| | - Anna Gebhardt
- Immunopathology of Virus Infection Laboratory, Institute of Virology, Technical University of Munich, Munich, Germany
| | - Wiebke Nadolni
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany
| | - Wera Burow
- Institute of Anatomy and Cell Biology, Julius-Maximilians-University, Würzburg, Germany
| | - Christian Herr
- Department of Internal Medicine V, Saarland University Hospital, Homburg, Germany
| | | | - Soumya Kusumakshi
- Institute for Experimental and Clinical Pharmacology and Toxicology, Saarland University, Homburg, Germany
| | - Fabien Ectors
- FARAH Mammalian Transgenics Platform, Liège University, Liège, Belgium
| | - Tatjana I Kichko
- Institute of Physiology and Pathophysiology, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Lisa Hübner
- Institute of Anatomy and Cell Biology, Julius-Maximilians-University, Würzburg, Germany
| | - Peter Reeh
- Institute of Physiology and Pathophysiology, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Antje Munder
- Clinic for Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, Hannover, Germany
| | - Sandra-Maria Wienhold
- Department of Infectious Diseases and Respiratory Medicine, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Martin Witzenrath
- Department of Infectious Diseases and Respiratory Medicine, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Robert Bals
- Department of Internal Medicine V, Saarland University Hospital, Homburg, Germany
| | - Veit Flockerzi
- Institute for Experimental and Clinical Pharmacology and Toxicology, Saarland University, Homburg, Germany
| | - Thomas Gudermann
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Peter Lipp
- Institute for Molecular Cell Biology, Saarland University, Homburg, Germany
| | - Susanna Zierler
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany
| | - Vladimir Chubanov
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany
| | - Andreas Pichlmair
- Immunopathology of Virus Infection Laboratory, Institute of Virology, Technical University of Munich, Munich, Germany
| | - Peter König
- Institute of Anatomy, University of Luebeck, Luebeck, Germany
| | - Ulrich Boehm
- Institute for Experimental and Clinical Pharmacology and Toxicology, Saarland University, Homburg, Germany
| | | |
Collapse
|
16
|
Müller R, Hofer W, Oueis E, Abou Fayad A, Deschner F, Andreas A, de Carvalho LP, Hüttel S, Bernecker S, Pätzold L, Morgenstern B, Zaburannyi N, Bischoff M, Stadler M, Held J, Herrmann J. Regio‐ and Stereoselective Epoxidation and Acidic Epoxide Opening of Antibacterial and Antiplasmodial Chlorotonils Yield Highly Potent Derivatives. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rolf Müller
- Helmholtz-Institute for Pharmaceutical Research Saarland Microbial Natural Products Campus Building E8.1 66123 Saarbrücken GERMANY
| | - Walter Hofer
- Helmholtz-Institut fur Pharmazeutische Forschung Saarland Microbial Natural Products Campus Building E8.1 66123 Saarbrücken GERMANY
| | - Emilia Oueis
- Khalifa University of Science and Technology Department of Chemistry 127788 Abu Dhabi UNITED ARAB EMIRATES
| | - Antoine Abou Fayad
- American University of Beirut Department of Experimental Pathology, Immunology and Microbiology Beirut LEBANON
| | - Felix Deschner
- Helmholtz-Institut fur Pharmazeutische Forschung Saarland Microbial Natural Products Campus Building E8.1 66123 Saarbrücken GERMANY
| | - Anastasia Andreas
- Helmholtz-Institut fur Pharmazeutische Forschung Saarland Microbial Natural Products Campus Building E8.1 66123 Saarbrücken GERMANY
| | - Laìs Pessanha de Carvalho
- University of Tübingen: Eberhard Karls Universitat Tubingen Institute of Tropical Medicine Wilhelmstraße 27 72074 Tübingen GERMANY
| | - Stephan Hüttel
- Helmholtz Centre for Infection Research: Helmholtz-Zentrum fur Infektionsforschung GmbH Microbial Drugs Inhoffenstraße 7 38124 Braunschweig GERMANY
| | - Steffen Bernecker
- HZI: Helmholtz-Zentrum fur Infektionsforschung GmbH Microbial Drugs Inhoffenstraße 7 38124 Braunschweig GERMANY
| | - Linda Pätzold
- Universität des Saarlandes: Universitat des Saarlandes Institute for Medical Microbiology and Hygiene 66421 Homburg GERMANY
| | - Bernd Morgenstern
- Universität des Saarlandes: Universitat des Saarlandes Inorganic Solid State Chemistry 66123 Saarbrücken GERMANY
| | - Nestor Zaburannyi
- Helmholtz-Institut fur Pharmazeutische Forschung Saarland Microbial Natural Products 66123 Saarbrücken GERMANY
| | - Markus Bischoff
- Universität des Saarlandes: Universitat des Saarlandes Institute for Medical Microbiology and Hygiene 66421 Homburg GERMANY
| | - Marc Stadler
- HZI: Helmholtz-Zentrum fur Infektionsforschung GmbH Microbial Drugs Inhoffenstraße 7 38124 Braunschweig GERMANY
| | - Jana Held
- Eberhard Karls Universität Tübingen: Eberhard Karls Universitat Tubingen Institute of Tropical Medicine Wilhelmstraße 27 72074 Tübingen GERMANY
| | - Jennifer Herrmann
- Helmholtz-Institut fur Pharmazeutische Forschung Saarland Microbial Natural Products Campus Building E8.1 66123 Saarbrücken GERMANY
| |
Collapse
|
17
|
Jung P, Zhou X, Iden S, Qu B, Bischoff M. Characterization of the Elasticity of CD4 + T Cells: An Approach Based on Peak Force Quantitative Nanomechanical Mapping. Bio Protoc 2022; 12:e4383. [PMID: 35800101 PMCID: PMC9081480 DOI: 10.21769/bioprotoc.4383] [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: 02/25/2022] [Revised: 12/07/2021] [Accepted: 03/02/2022] [Indexed: 12/29/2022] Open
Abstract
CD4+ T cells are essential players in orchestrating the specific immune response against intracellular pathogens, and in inhibiting tumor development in an early stage. The activation of T cells is triggered by engagement of T cell receptors (TCRs). Here, CD3 and CD28 molecules are key factors, (co)stimulating signaling pathways essential for activation and proliferation of CD4+ T cells. T cell activation induces the formation of a tight mechanical bond between T cell and target cell, the so-called immunological synapse (IS). Due to this, mechanical cell properties, including stiffness, play a significant role in modulating cell functions. In the past, many approaches were made to investigate mechanical properties of immune cells, including micropipette aspiration, microplate-based rheometry, techniques based on deformation during cytometry, or the use of optical tweezers. However, the stiffness of T lymphocytes at a subcellular level at the IS still remains largely elusive. With this protocol, we introduce a method based on atomic force microscopy (AFM), to investigate the local cellular stiffness of T cells on functionalized glass/Polydimethylsiloxan (PDMS) surfaces, which mimicks focal stimulation of target cells inducing IS formation by T cells. By applying the peak force nanomechanical mapping (QNM) technique, cellular surface structures and the local stiffness are determined simultaneously, with a resolution of approximately 60 nm. This protocol can be easily adapted to investigate the mechanical impact of numerous factors influencing IS formation and T cell activation. Graphical abstract: Overview of the experimental workflow. Individual experimental steps are shown on the left, hands on and incubation times for each step are shown right.
Collapse
Affiliation(s)
- Philipp Jung
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
,
*For correspondence:
| | - Xiangda Zhou
- Department of Biophysics, Center for Integrative Physiology and Molecular Medicine (CIPMM), School of Medicine, Saarland University, Homburg, Germany
| | - Sandra Iden
- Cell and Developmental Biology, Center of Human and Molecular Biology (ZHMB), Saarland University, Homburg, Germany
| | - Bin Qu
- Department of Biophysics, Center for Integrative Physiology and Molecular Medicine (CIPMM), School of Medicine, Saarland University, Homburg, Germany
,Leibniz Institute for New Materials, Saarbrücken, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| |
Collapse
|
18
|
Mischo J, Faidt T, McMillan RB, Dudek J, Gunaratnam G, Bayenat P, Holtsch A, Spengler C, Müller F, Hähl H, Bischoff M, Hannig M, Jacobs K. Hydroxyapatite Pellets as Versatile Model Surfaces for Systematic Adhesion Studies on Enamel: A Force Spectroscopy Case Study. ACS Biomater Sci Eng 2022; 8:1476-1485. [PMID: 35263544 PMCID: PMC9007113 DOI: 10.1021/acsbiomaterials.1c00925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 02/22/2022] [Indexed: 02/08/2023]
Abstract
Research into materials for medical application draws inspiration from naturally occurring or synthesized surfaces, just like many other research directions. For medical application of materials, particular attention has to be paid to biocompatibility, osseointegration, and bacterial adhesion behavior. To understand their properties and behavior, experimental studies with natural materials such as teeth are strongly required. The results, however, may be highly case-dependent because natural surfaces have the disadvantage of being subject to wide variations, for instance in their chemical composition, structure, morphology, roughness, and porosity. A synthetic surface which mimics enamel in its performance with respect to bacterial adhesion and biocompatibility would, therefore, facilitate systematic studies much better. In this study, we discuss the possibility of using hydroxyapatite (HAp) pellets to simulate the surfaces of teeth and show the possibility and limitations of using a model surface. We performed single-cell force spectroscopy with single Staphylococcus aureus cells to measure adhesion-related parameters such as adhesion force and rupture length of cell wall proteins binding to HAp and enamel. We also examine the influence of blood plasma and saliva on the adhesion properties of S. aureus. The results of these measurements are matched to water wettability, elemental composition of the samples, and the change in the macromolecules adsorbed over time on the surface. We found that the adhesion properties of S. aureus were similar on HAp and enamel samples under all conditions: Significant decreases in adhesion strength were found equally in the presence of saliva or blood plasma on both surfaces. We therefore conclude that HAp pellets are a good alternative for natural dental material. This is especially true when slight variations in the physicochemical properties of the natural materials may affect the experimental series.
Collapse
Affiliation(s)
- Johannes Mischo
- Experimental
Physics and Center for Biophysics, Saarland
University, 66123 Saarbrücken, Germany
| | - Thomas Faidt
- Experimental
Physics and Center for Biophysics, Saarland
University, 66123 Saarbrücken, Germany
| | - Ryan B. McMillan
- Experimental
Physics and Center for Biophysics, Saarland
University, 66123 Saarbrücken, Germany
| | - Johanna Dudek
- Clinic
of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University, 66421 Homburg/Saar, Germany
| | - Gubesh Gunaratnam
- Institute
of Medical Microbiology and Hygiene and Center for Biophysics, Saarland University, 66421 Homburg/Saar, Germany
| | - Pardis Bayenat
- Experimental
Physics and Center for Biophysics, Saarland
University, 66123 Saarbrücken, Germany
| | - Anne Holtsch
- Experimental
Physics and Center for Biophysics, Saarland
University, 66123 Saarbrücken, Germany
| | - Christian Spengler
- Experimental
Physics and Center for Biophysics, Saarland
University, 66123 Saarbrücken, Germany
| | - Frank Müller
- Experimental
Physics and Center for Biophysics, Saarland
University, 66123 Saarbrücken, Germany
| | - Hendrik Hähl
- Experimental
Physics and Center for Biophysics, Saarland
University, 66123 Saarbrücken, Germany
| | - Markus Bischoff
- Institute
of Medical Microbiology and Hygiene and Center for Biophysics, Saarland University, 66421 Homburg/Saar, Germany
| | - Matthias Hannig
- Clinic
of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University, 66421 Homburg/Saar, Germany
| | - Karin Jacobs
- Experimental
Physics and Center for Biophysics, Saarland
University, 66123 Saarbrücken, Germany
- Max
Planck School Matter to Life, Jahnstraße 29, 69120 Heidelberg, Germany
| |
Collapse
|
19
|
Abdrabou AMM, Bischoff M, Mellmann A, von Müller L, Margardt L, Gärtner BC, Berger FK, Haase G, Häfner H, Hoffmann R, Simon V, Stappmanns H, Hischebeth GT, Büchler C, Rößler S, Hochauf-Stange K, Pfeffer K, MacKenzie C, Kunz C, Alsalameh R, Dziobaka J, le Chapot VS, Sanabria E, Hogardt M, Komp J, Imirzalioglu C, Schmiedel J, Pararas M, Sommer F, Groß U, Bohne W, Kekulé AS, Dagwadordsch U, Löffler B, Rödel J, Walker SV, Tobys D, Weikert-Asbeck S, Hauswaldt S, Kaasch AJ, Zautner AE, Joß N, Siegel E, Kehr K, Schaumburg F, Schoeler S, Hamprecht A, Hellkamp J, Hagemann JB, Kubis J, Hering S, Warnke P. Implementation of a Clostridioides difficile sentinel surveillance system in Germany: First insights for 2019–2021. Anaerobe 2022; 77:102548. [DOI: 10.1016/j.anaerobe.2022.102548] [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] [Received: 01/22/2022] [Revised: 03/08/2022] [Accepted: 03/14/2022] [Indexed: 11/01/2022]
|
20
|
Spengler C, Nolle F, Thewes N, Wieland B, Jung P, Bischoff M, Jacobs K. Using Knock-Out Mutants to Investigate the Adhesion of Staphylococcus aureus to Abiotic Surfaces. Int J Mol Sci 2021; 22:11952. [PMID: 34769382 PMCID: PMC8584566 DOI: 10.3390/ijms222111952] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 10/29/2021] [Accepted: 10/30/2021] [Indexed: 12/19/2022] Open
Abstract
The adhesion of Staphylococcus aureus to abiotic surfaces is crucial for establishing device-related infections. With a high number of single-cell force spectroscopy measurements with genetically modified S. aureus cells, this study provides insights into the adhesion process of the pathogen to abiotic surfaces of different wettability. Our results show that S. aureus utilizes different cell wall molecules and interaction mechanisms when binding to hydrophobic and hydrophilic surfaces. We found that covalently bound cell wall proteins strongly interact with hydrophobic substrates, while their contribution to the overall adhesion force is smaller on hydrophilic substrates. Teichoic acids promote adhesion to hydrophobic surfaces as well as to hydrophilic surfaces. This, however, is to a lesser extent. An interplay of electrostatic effects of charges and protein composition on bacterial surfaces is predominant on hydrophilic surfaces, while it is overshadowed on hydrophobic surfaces by the influence of the high number of binding proteins. Our results can help to design new models of bacterial adhesion and may be used to interpret the adhesion of other microorganisms with similar surface properties.
Collapse
Affiliation(s)
- Christian Spengler
- Experimental Physics and Center for Biophysics, Saarland University, 66123 Saarbrücken, Germany; (C.S.); (F.N.); (N.T.)
| | - Friederike Nolle
- Experimental Physics and Center for Biophysics, Saarland University, 66123 Saarbrücken, Germany; (C.S.); (F.N.); (N.T.)
| | - Nicolas Thewes
- Experimental Physics and Center for Biophysics, Saarland University, 66123 Saarbrücken, Germany; (C.S.); (F.N.); (N.T.)
| | - Ben Wieland
- Institute of Medical Microbiology and Hygiene and Center for Biophysics, Saarland University, 66421 Homburg, Germany; (B.W.); (P.J.); (M.B.)
| | - Philipp Jung
- Institute of Medical Microbiology and Hygiene and Center for Biophysics, Saarland University, 66421 Homburg, Germany; (B.W.); (P.J.); (M.B.)
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene and Center for Biophysics, Saarland University, 66421 Homburg, Germany; (B.W.); (P.J.); (M.B.)
| | - Karin Jacobs
- Experimental Physics and Center for Biophysics, Saarland University, 66123 Saarbrücken, Germany; (C.S.); (F.N.); (N.T.)
- Max Planck School Matter to Life, Jahnstraße 29, 69120 Heidelberg, Germany
| |
Collapse
|
21
|
Gunaratnam G, Dudek J, Jung P, Becker SL, Jacobs K, Bischoff M, Hannig M. Quantification of the Adhesion Strength of Candida albicans to Tooth Enamel. Microorganisms 2021; 9:2213. [PMID: 34835339 PMCID: PMC8624353 DOI: 10.3390/microorganisms9112213] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/16/2021] [Accepted: 10/21/2021] [Indexed: 11/22/2022] Open
Abstract
Caries is one of the most prevalent diseases worldwide, which is caused by the degradation of the tooth enamel surface. In earlier research the opportunistic pathogen Candida albicans has been associated with the formation of caries in children. Colonization of teeth by C. albicans starts with the initial adhesion of individual yeast cells to the tooth enamel surface. In this study, we visualized the initial colonization of C. albicans yeast cells on pellicle-covered enamel by scanning electron microscopy. To quantitatively unravel the initial adhesion strength, we applied fluidic force microscopy-based single-cell force spectroscopy to examine the key adhesion parameters adhesion force, rupture length and de-adhesion work. We analyzed single saliva-treated or untreated yeast cells on tooth enamel specimens with or without salivary pellicle. Under all tested conditions, adhesion forces in the lower nanonewton range were determined. Furthermore, we have found that all adhesion parameters were enhanced on the pellicle-covered compared to the uncovered enamel. Our data suggest that initial adhesion occurs through a strong interaction between yeast cell wall-associated adhesins and the salivary pellicle. Future SCFS studies may show whether specific management of the salivary pellicle reduces the adhesion of C. albicans on teeth and thus contributes to caries prophylaxis.
Collapse
Affiliation(s)
- Gubesh Gunaratnam
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany; (P.J.); (S.L.B.); (M.B.)
| | - Johanna Dudek
- Clinic of Operative Dentistry and Periodontology, Saarland University, 66421 Homburg, Germany; (J.D.); (M.H.)
| | - Philipp Jung
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany; (P.J.); (S.L.B.); (M.B.)
| | - Sören L. Becker
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany; (P.J.); (S.L.B.); (M.B.)
| | - Karin Jacobs
- Experimental Physics, Saarland University, 66123 Saarbrücken, Germany;
- Max Planck School Matter to Life, 69120 Heidelberg, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany; (P.J.); (S.L.B.); (M.B.)
| | - Matthias Hannig
- Clinic of Operative Dentistry and Periodontology, Saarland University, 66421 Homburg, Germany; (J.D.); (M.H.)
| |
Collapse
|
22
|
Jung P, Zhou X, Iden S, Bischoff M, Qu B. T cell stiffness is enhanced upon formation of immunological synapse. eLife 2021; 10:66643. [PMID: 34313220 PMCID: PMC8360652 DOI: 10.7554/elife.66643] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 01/18/2021] [Accepted: 07/26/2021] [Indexed: 12/19/2022] Open
Abstract
T cells are activated by target cells via an intimate contact, termed immunological synapse (IS). Cellular mechanical properties, especially stiffness, are essential to regulate cell functions. However, T cell stiffness at a subcellular level at the IS still remains largely elusive. In this work, we established an atomic force microscopy (AFM)-based elasticity mapping method on whole T cells to obtain an overview of the stiffness with a resolution of ~60 nm. Using primary human CD4+ T cells, we show that when T cells form IS with stimulating antibody-coated surfaces, the lamellipodia are stiffer than the cell body. Upon IS formation, T cell stiffness is enhanced both at the lamellipodia and on the cell body. Chelation of intracellular Ca2+ abolishes IS-induced stiffening at the lamellipodia but has no influence on cell-body-stiffening, suggesting different regulatory mechanisms of IS-induced stiffening at the lamellipodia and the cell body.
Collapse
Affiliation(s)
- Philipp Jung
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Xiangda Zhou
- Department of Biophysics, Center for Integrative Physiology and Molecular Medicine (CIPMM), School of Medicine, Saarland University, Homburg, Germany
| | - Sandra Iden
- Cell and Developmental Biology, School of Medicine, Center of Human and Molecular Biology (ZHMB), Saarland University, Homburg, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Bin Qu
- Department of Biophysics, Center for Integrative Physiology and Molecular Medicine (CIPMM), School of Medicine, Saarland University, Homburg, Germany.,Leibniz Institute for New Materials, Saarbrücken, Germany
| |
Collapse
|
23
|
Elhawy MI, Molle V, Becker SL, Bischoff M. The Low-Molecular Weight Protein Arginine Phosphatase PtpB Affects Nuclease Production, Cell Wall Integrity, and Uptake Rates of Staphylococcus aureus by Polymorphonuclear Leukocytes. Int J Mol Sci 2021; 22:ijms22105342. [PMID: 34069497 PMCID: PMC8161221 DOI: 10.3390/ijms22105342] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/11/2021] [Accepted: 05/17/2021] [Indexed: 02/03/2023] Open
Abstract
The epidemiological success of Staphylococcus aureus as a versatile pathogen in mammals is largely attributed to its virulence factor repertoire and the sophisticated regulatory network controlling this virulon. Here we demonstrate that the low-molecular-weight protein arginine phosphatase PtpB contributes to this regulatory network by affecting the growth phase-dependent transcription of the virulence factor encoding genes/operons aur, nuc, and psmα, and that of the small regulatory RNA RNAIII. Inactivation of ptpB in S. aureus SA564 also significantly decreased the capacity of the mutant to degrade extracellular DNA, to hydrolyze proteins in the extracellular milieu, and to withstand Triton X-100 induced autolysis. SA564 ΔptpB mutant cells were additionally ingested faster by polymorphonuclear leukocytes in a whole blood phagocytosis assay, suggesting that PtpB contributes by several ways positively to the ability of S. aureus to evade host innate immunity.
Collapse
Affiliation(s)
- Mohamed Ibrahem Elhawy
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany; (M.I.E.); (S.L.B.)
- Department of Pathology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44511, Egypt
| | - Virginie Molle
- Laboratory of Pathogen Host Interactions, Université de Montpellier, CNRS, UMR 5235, 34095 Montpellier, France;
| | - Sören L. Becker
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany; (M.I.E.); (S.L.B.)
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Germany; (M.I.E.); (S.L.B.)
- Correspondence: ; Tel.: +49-6841-1623963
| |
Collapse
|
24
|
Gunaratnam G, Spengler C, Trautmann S, Jung P, Mischo J, Wieland B, Metz C, Becker SL, Hannig M, Jacobs K, Bischoff M. Publisher Correction: Human blood plasma factors affect the adhesion kinetics of Staphylococcus aureus to central venous catheters. Sci Rep 2021; 11:9857. [PMID: 33947909 PMCID: PMC8096834 DOI: 10.1038/s41598-021-89018-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Affiliation(s)
- Gubesh Gunaratnam
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | | | - Simone Trautmann
- Clinic of Operative Dentistry and Periodontology, Saarland University, Homburg, Germany
| | - Philipp Jung
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Johannes Mischo
- Experimental Physics, Saarland University, Saarbrucken, Germany
| | - Ben Wieland
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Carlos Metz
- Department of Internal Medicine V, Pneumology and Intensive Care Medicine, Saarland University, Homburg, Germany
| | - Sören L Becker
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Matthias Hannig
- Clinic of Operative Dentistry and Periodontology, Saarland University, Homburg, Germany
| | - Karin Jacobs
- Experimental Physics, Saarland University, Saarbrucken, Germany.,Max Planck School Matter To Life, Heidelberg, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany.
| |
Collapse
|
25
|
Pätzold L, Brausch AC, Bielefeld EL, Zimmer L, Somerville GA, Bischoff M, Gaupp R. Impact of the Histidine-Containing Phosphocarrier Protein HPr on Carbon Metabolism and Virulence in Staphylococcus aureus. Microorganisms 2021; 9:microorganisms9030466. [PMID: 33668335 PMCID: PMC7996215 DOI: 10.3390/microorganisms9030466] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 02/07/2021] [Revised: 02/18/2021] [Accepted: 02/19/2021] [Indexed: 01/01/2023] Open
Abstract
Carbon catabolite repression (CCR) is a common mechanism pathogenic bacteria use to link central metabolism with virulence factor synthesis. In gram-positive bacteria, catabolite control protein A (CcpA) and the histidine-containing phosphocarrier protein HPr (encoded by ptsH) are the predominant mediators of CCR. In addition to modulating CcpA activity, HPr is essential for glucose import via the phosphotransferase system. While the regulatory functions of CcpA in Staphylococcus aureus are largely known, little is known about the function of HPr in CCR and infectivity. To address this knowledge gap, ptsH mutants were created in S. aureus that either lack the open reading frame or harbor a ptsH variant carrying a thymidine to guanosine mutation at position 136, and the effects of these mutations on growth and metabolism were assessed. Inactivation of ptsH altered bacterial physiology and decreased the ability of S. aureus to form a biofilm and cause infections in mice. These data demonstrate that HPr affects central metabolism and virulence in S. aureus independent of its influence on CcpA regulation.
Collapse
Affiliation(s)
- Linda Pätzold
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg, Germany; (L.P.); (A.-C.B.); (E.-L.B.); (L.Z.); (R.G.)
| | - Anne-Christine Brausch
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg, Germany; (L.P.); (A.-C.B.); (E.-L.B.); (L.Z.); (R.G.)
| | - Evelyn-Laura Bielefeld
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg, Germany; (L.P.); (A.-C.B.); (E.-L.B.); (L.Z.); (R.G.)
| | - Lisa Zimmer
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg, Germany; (L.P.); (A.-C.B.); (E.-L.B.); (L.Z.); (R.G.)
| | - Greg A. Somerville
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska, Lincoln, NE 68588, USA;
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg, Germany; (L.P.); (A.-C.B.); (E.-L.B.); (L.Z.); (R.G.)
- Correspondence: ; Tel.: +49-6841-162-39-63
| | - Rosmarie Gaupp
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg, Germany; (L.P.); (A.-C.B.); (E.-L.B.); (L.Z.); (R.G.)
| |
Collapse
|
26
|
Kaczor A, Witek K, Podlewska S, Sinou V, Czekajewska J, Żesławska E, Doroz-Płonka A, Lubelska A, Latacz G, Nitek W, Bischoff M, Alibert S, Pagès JM, Jacob C, Karczewska E, Bolla JM, Handzlik J. Molecular Insights into an Antibiotic Enhancer Action of New Morpholine-Containing 5-Arylideneimidazolones in the Fight against MDR Bacteria. Int J Mol Sci 2021; 22:ijms22042062. [PMID: 33669790 PMCID: PMC7922564 DOI: 10.3390/ijms22042062] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/11/2021] [Accepted: 02/13/2021] [Indexed: 01/21/2023] Open
Abstract
In the search for an effective strategy to overcome antimicrobial resistance, a series of new morpholine-containing 5-arylideneimidazolones differing within either the amine moiety or at position five of imidazolones was explored as potential antibiotic adjuvants against Gram-positive and Gram-negative bacteria. Compounds (7–23) were tested for oxacillin adjuvant properties in the Methicillin-susceptible S. aureus (MSSA) strain ATCC 25923 and Methicillin-resistant S. aureus MRSA 19449. Compounds 14–16 were tested additionally in combination with various antibiotics. Molecular modelling was performed to assess potential mechanism of action. Microdilution and real-time efflux (RTE) assays were carried out in strains of K. aerogenes to determine the potential of compounds 7–23 to block the multidrug efflux pump AcrAB-TolC. Drug-like properties were determined experimentally. Two compounds (10, 15) containing non-condensed aromatic rings, significantly reduced oxacillin MICs in MRSA 19449, while 15 additionally enhanced the effectiveness of ampicillin. Results of molecular modelling confirmed the interaction with the allosteric site of PBP2a as a probable MDR-reversing mechanism. In RTE, the compounds inhibited AcrAB-TolC even to 90% (19). The 4-phenylbenzylidene derivative (15) demonstrated significant MDR-reversal “dual action” for β-lactam antibiotics in MRSA and inhibited AcrAB-TolC in K. aerogenes. 15 displayed also satisfied solubility and safety towards CYP3A4 in vitro.
Collapse
Affiliation(s)
- Aneta Kaczor
- Department of Technology and Biotechnology of Drugs, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Krakow, Poland; (A.K.); (K.W.); (S.P.); (A.D.-P.); (A.L.); (G.L.)
| | - Karolina Witek
- Department of Technology and Biotechnology of Drugs, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Krakow, Poland; (A.K.); (K.W.); (S.P.); (A.D.-P.); (A.L.); (G.L.)
- Department of Pharmaceutical Microbiology, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Krakow, Poland; (J.C.); (E.K.)
- UMR_MD1, U-1261, Aix Marseille Univ, INSERM, SSA, MCT, Faculté de Pharmacie, 27 Bd Jean Moulin, 13005 Marseille, France; (V.S.); (S.A.); (J.-M.P.); (J.-M.B.)
- Institute for Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg/Saar, Germany;
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, Campus B 2.1, D-66123 Saarbruecken, Germany;
| | - Sabina Podlewska
- Department of Technology and Biotechnology of Drugs, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Krakow, Poland; (A.K.); (K.W.); (S.P.); (A.D.-P.); (A.L.); (G.L.)
- Maj Institute of Pharmacology, Polish Academy of Sciences, Department of Medicinal Chemistry, ul. Smętna 12, 31-343 Krakow, Poland
| | - Veronique Sinou
- UMR_MD1, U-1261, Aix Marseille Univ, INSERM, SSA, MCT, Faculté de Pharmacie, 27 Bd Jean Moulin, 13005 Marseille, France; (V.S.); (S.A.); (J.-M.P.); (J.-M.B.)
| | - Joanna Czekajewska
- Department of Pharmaceutical Microbiology, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Krakow, Poland; (J.C.); (E.K.)
| | - Ewa Żesławska
- Pedagogical University of Cracow, Institute of Biology, ul. Podchorążych 2, 30-084 Krakow, Poland;
| | - Agata Doroz-Płonka
- Department of Technology and Biotechnology of Drugs, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Krakow, Poland; (A.K.); (K.W.); (S.P.); (A.D.-P.); (A.L.); (G.L.)
| | - Annamaria Lubelska
- Department of Technology and Biotechnology of Drugs, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Krakow, Poland; (A.K.); (K.W.); (S.P.); (A.D.-P.); (A.L.); (G.L.)
| | - Gniewomir Latacz
- Department of Technology and Biotechnology of Drugs, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Krakow, Poland; (A.K.); (K.W.); (S.P.); (A.D.-P.); (A.L.); (G.L.)
| | - Wojciech Nitek
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Krakow, Poland;
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg/Saar, Germany;
| | - Sandrine Alibert
- UMR_MD1, U-1261, Aix Marseille Univ, INSERM, SSA, MCT, Faculté de Pharmacie, 27 Bd Jean Moulin, 13005 Marseille, France; (V.S.); (S.A.); (J.-M.P.); (J.-M.B.)
| | - Jean-Marie Pagès
- UMR_MD1, U-1261, Aix Marseille Univ, INSERM, SSA, MCT, Faculté de Pharmacie, 27 Bd Jean Moulin, 13005 Marseille, France; (V.S.); (S.A.); (J.-M.P.); (J.-M.B.)
| | - Claus Jacob
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, Campus B 2.1, D-66123 Saarbruecken, Germany;
| | - Elżbieta Karczewska
- Department of Pharmaceutical Microbiology, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Krakow, Poland; (J.C.); (E.K.)
| | - Jean-Michel Bolla
- UMR_MD1, U-1261, Aix Marseille Univ, INSERM, SSA, MCT, Faculté de Pharmacie, 27 Bd Jean Moulin, 13005 Marseille, France; (V.S.); (S.A.); (J.-M.P.); (J.-M.B.)
| | - Jadwiga Handzlik
- Department of Technology and Biotechnology of Drugs, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Krakow, Poland; (A.K.); (K.W.); (S.P.); (A.D.-P.); (A.L.); (G.L.)
- Correspondence: ; Tel.: +48 12 620-55-80
| |
Collapse
|
27
|
Shi L, Muthukumar V, Stachon T, Latta L, Elhawy MI, Gunaratnam G, Orosz E, Seitz B, Kiderlen AF, Bischoff M, Szentmáry N. The Effect of Anti-Amoebic Agents and Ce6-PDT on Acanthamoeba castellanii Trophozoites and Cysts, In Vitro. Transl Vis Sci Technol 2020; 9:29. [PMID: 33262903 PMCID: PMC7691790 DOI: 10.1167/tvst.9.12.29] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 08/13/2020] [Indexed: 12/16/2022] Open
Abstract
Purpose The purpose of this study was to analyze the concentration-dependent effects of biguanides (polyhexamethylene biguanide [PHMB], chlorhexidine [CH]); diamidines (hexamidine-diisethionate [HD], propamidine-isethionate [PD], dibromopropamidine-diisethionate [DD]); natamycin (NM); miltefosine (MF); povidone iodine (PVPI), and chlorin e6 PDT on Acanthamoeba trophozoites and cysts, in vitro. Methods Strain 1BU was cultured in peptone-yeast extract-glucose medium. Trophozoites or cysts were cultured in PYG medium containing each agent at 100%, 50%, and 25% of maximum concentration for 2 hours. The percentage of dead trophozoites was determined using a non-radioactive cytotoxicity assay and trypan blue staining. Treated cysts were also maintained on non-nutrient agar Escherichia coli (E. coli) plates and observed for 3 weeks. Results All tested drugs displayed significant cytotoxic effects on 1BU cells based on the biochemical and staining-based viability assays tested. On non-nutrient agar E. coli plates, neither trophozoites nor freshly formed cysts were observed after PHMB, PD, NM, and PVPI treatment, respectively, within 3 weeks. However, CH-, HD-, DD-, and MF-treated cysts could excyst, multiply, and encyst again. Conclusions The off-label drugs PHMB, PD, NM, and PVPI are under in vitro conditions more effective against strain 1BU than CH, HD, DD, and MF. Our findings also suggest that the non-nutrient agar E. coli plate assay should be considered as method of choice for the in vitro analysis of the treatment efficacy of anti-amoebic agents. Translational Relevance Ophthalmologists may optimize the treatment regime against Acanthamoeba keratitis by pre-testing the in vitro susceptibilities of the Acanthamoeba strain against drugs of interest with the non-nutrient E. coli agar plate assay.
Collapse
Affiliation(s)
- Lei Shi
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany.,Department of Ophthalmology, The First Affiliated Hospital of USTC, Division of Life Science and Medicine, University of Science and Technology of China, Hefei, People's Republic of China
| | - Vithusan Muthukumar
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg/Saar, Germany
| | - Tanja Stachon
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany
| | - Lorenz Latta
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany
| | - Mohamed Ibrahem Elhawy
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg/Saar, Germany
| | - Gubesh Gunaratnam
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg/Saar, Germany
| | - Erika Orosz
- Department of Parasitology, National Public Health Center, Budapest, Hungary
| | - Berthold Seitz
- Department of Ophthalmology, Saarland University Medical Center, Homburg/Saar, Germany
| | | | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg/Saar, Germany
| | - Nóra Szentmáry
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany.,Department of Ophthalmology, Semmelweis University, Budapest, Hungary
| |
Collapse
|
28
|
Jung P, Mischo CE, Gunaratnam G, Spengler C, Becker SL, Hube B, Jacobs K, Bischoff M. Candida albicans adhesion to central venous catheters: Impact of blood plasma-driven germ tube formation and pathogen-derived adhesins. Virulence 2020; 11:1453-1465. [PMID: 33108253 PMCID: PMC7595616 DOI: 10.1080/21505594.2020.1836902] [Citation(s) in RCA: 12] [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] [Indexed: 12/30/2022] Open
Abstract
Candida albicans-related bloodstream infections are often associated with infected central venous catheters (CVC) triggered by microbial adhesion and biofilm formation. We utilized single-cell force spectroscopy (SCFS) and flow chamber models to investigate the adhesion behavior of C. albicans yeast cells and germinated cells to naïve and human blood plasma (HBP)-coated CVC tubing. Germinated cells demonstrated up to 56.8-fold increased adhesion forces to CVC surfaces when compared to yeast cells. Coating of CVCs with HBP significantly increased the adhesion of 60-min germinated cells but not of yeast cells and 30-min germinated cells. Under flow conditions comparable to those in major human veins, germinated cells displayed a flow directional-orientated adhesion pattern to HBP-coated CVC material, suggesting the germ tip to serve as the major adhesive region. None of the above-reported phenotypes were observed with germinated cells of an als3Δ deletion mutant, which displayed similar adhesion forces to CVC surfaces as the isogenic yeast cells. Germinated cells of the als3Δ mutant also lacked a clear flow directional-orientated adhesion pattern on HBP-coated CVC material, indicating a central role for Als3 in the adhesion of germinated C. albicans cells to blood exposed CVC surfaces. In the common model of C. albicans, biofilm formation is thought to be mediated primarily by yeast cells, followed by surface-triggered the formation of hyphae. We suggest an extension of this model in which C. albicans germ tubes promote the initial adhesion to blood-exposed implanted medical devices via the germ tube-associated adhesion protein Als3.
Collapse
Affiliation(s)
- Philipp Jung
- Institute for Medical Microbiology and Hygiene, Saarland University , Homburg, Germany
| | - Clara E Mischo
- Institute for Medical Microbiology and Hygiene, Saarland University , Homburg, Germany
| | - Gubesh Gunaratnam
- Institute for Medical Microbiology and Hygiene, Saarland University , Homburg, Germany
| | | | - Sören L Becker
- Institute for Medical Microbiology and Hygiene, Saarland University , Homburg, Germany
| | - Bernhard Hube
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knoell Institute Jena (HKI) , Jena, Germany.,Institute of Microbiology, Friedrich Schiller University , Jena, Germany
| | - Karin Jacobs
- Experimental Physics, Saarland University , Saarbrücken, Germany.,Max Planck School Matter to Life , Heidelberg, Jahnstr. 29, D-69120, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University , Homburg, Germany
| |
Collapse
|
29
|
Haupenthal J, Kautz Y, Elgaher WAM, Pätzold L, Röhrig T, Laschke MW, Tschernig T, Hirsch AKH, Molodtsov V, Murakami KS, Hartmann RW, Bischoff M. Evaluation of Bacterial RNA Polymerase Inhibitors in a Staphylococcus aureus-Based Wound Infection Model in SKH1 Mice. ACS Infect Dis 2020; 6:2573-2581. [PMID: 32886885 DOI: 10.1021/acsinfecdis.0c00034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Chronic wounds infected with pathogens such as Staphylococcus aureus represent a worldwide health concern, especially in patients with a compromised immune system. As antimicrobial resistance has become an immense global problem, novel antibiotics are urgently needed. One strategy to overcome this threatening situation is the search for drugs targeting novel binding sites on essential and validated enzymes such as the bacterial RNA polymerase (RNAP). In this work, we describe the establishment of an in vivo wound infection model based on the pathogen S. aureus and hairless Crl:SKH1-Hrhr (SKH1) mice. The model proved to be a valuable preclinical tool to study selected RNAP inhibitors after topical application. While rifampicin showed a reduction in the loss of body weight induced by the bacteria, an acceleration of wound healing kinetics, and a reduced number of colony forming units in the wound, the ureidothiophene-2-carboxylic acid 1 was inactive under in vivo conditions, probably due to strong plasma protein binding. The cocrystal structure of compound 1 with RNAP, that we hereby also present, will be of great value for applying appropriate structural modifications to further optimize the compound, especially in terms of plasma protein binding.
Collapse
Affiliation(s)
- Jörg Haupenthal
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)−Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Saarland, Germany
| | - Yannik Kautz
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Saarland, Germany
| | - Walid A. M. Elgaher
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)−Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Saarland, Germany
| | - Linda Pätzold
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Saarland, Germany
| | - Teresa Röhrig
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)−Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Saarland, Germany
| | - Matthias W. Laschke
- Institute for Clinical & Experimental Surgery, Saarland University, 66421 Homburg, Saarland, Germany
| | - Thomas Tschernig
- Institute of Anatomy and Cell Biology, Saarland University, 66421 Homburg, Saarland, Germany
| | - Anna K. H. Hirsch
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)−Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Saarland, Germany
- Department of Pharmacy, Saarland University, Campus Building E8.1, 66123 Saarbrücken, Saarland, Germany
| | - Vadim Molodtsov
- Department of Biochemistry and Molecular Biology, The Center for RNA Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Katsuhiko S. Murakami
- Department of Biochemistry and Molecular Biology, The Center for RNA Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Rolf W. Hartmann
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)−Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Saarland, Germany
- Department of Pharmacy, Saarland University, Campus Building E8.1, 66123 Saarbrücken, Saarland, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg, Saarland, Germany
| |
Collapse
|
30
|
Maikranz E, Spengler C, Thewes N, Thewes A, Nolle F, Jung P, Bischoff M, Santen L, Jacobs K. Different binding mechanisms of Staphylococcus aureus to hydrophobic and hydrophilic surfaces. Nanoscale 2020; 12:19267-19275. [PMID: 32935690 DOI: 10.1039/d0nr03134h] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Bacterial adhesion to surfaces is a crucial step in initial biofilm formation. In a combined experimental and computational approach, we studied the adhesion of the pathogenic bacterium Staphylococcus aureus to hydrophilic and hydrophobic surfaces. We used atomic force microscopy-based single-cell force spectroscopy and Monte Carlo simulations to investigate the similarities and differences of adhesion to hydrophilic and hydrophobic surfaces. Our results reveal that binding to both types of surfaces is mediated by thermally fluctuating cell wall macromolecules that behave differently on each type of substrate: on hydrophobic surfaces, many macromolecules are involved in adhesion, yet only weakly tethered, leading to high variance between individual bacteria, but low variance between repetitions with the same bacterium. On hydrophilic surfaces, however, only few macromolecules tether strongly to the surface. Since during every repetition with the same bacterium different macromolecules bind, we observe a comparable variance between repetitions and different bacteria. We expect these findings to be of importance for the understanding of the adhesion behaviour of many bacterial species as well as other microorganisms and even nanoparticles with soft, macromolecular coatings, used e.g. for biological diagnostics.
Collapse
Affiliation(s)
- Erik Maikranz
- Theoretical Physics, Saarland University, Center for Biophysics, 66123 Saarbrücken, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Abdulnasser Harfoush S, Hannig M, Le DD, Heck S, Leitner M, Omlor AJ, Tavernaro I, Kraegeloh A, Kautenburger R, Kickelbick G, Beilhack A, Bischoff M, Nguyen J, Sester M, Bals R, Dinh QT. High-dose intranasal application of titanium dioxide nanoparticles induces the systemic uptakes and allergic airway inflammation in asthmatic mice. Respir Res 2020; 21:168. [PMID: 32616045 PMCID: PMC7331175 DOI: 10.1186/s12931-020-01386-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 05/04/2020] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND Titanium dioxide nanoparticles (TiO2 NPs) have a wide range of applications in several industrial and biomedical domains. Based on the evidence, the workers exposed to inhaled nanosized TiO2 powder are more susceptible to the risks of developing respiratory diseases. Accordingly, this issue has increasingly attracted the researchers' interest in understanding the consequences of TiO2 NPs exposure. Regarding this, the present study was conducted to analyze the local effects of TiO2 NPs on allergic airway inflammation and their uptake in a mouse model of ovalbumin (OVA)-induced allergic airway inflammation. METHODS For the purpose of the study, female BALB/c mice with or without asthma were intranasally administered with TiO2 NPs. The mice were subjected to histological assessment, lung function testing, scanning electron microscopy (SEM), inductively coupled plasma mass spectrometry (ICP-MS), and NP uptake measurement. In addition, T helper (Th) 1/Th2 cytokines were evaluated in the lung homogenate using the enzyme-linked immunosorbent assay. RESULTS According to the results, the mice receiving OVA alone or OVA plus TiO2 NPs showed eosinophilic infiltrates and mucus overproduction in the lung tissues, compared to the controls. Furthermore, a significant elevation was observed in the circulating Th2 cytokines, including interleukin (IL)-4, IL-5, and IL-13 after NP exposure. The TiO2 NPs were taken up by alveolar macrophages at different time points. As the results of the SEM and ICP-MS indicated, TiO2 NPs were present in most of the organs in both asthmatic and non-asthmatic mice. CONCLUSION Based on the findings of the current study, intranasally or inhalation exposure to high-dose nanosized TiO2 particles appears to exacerbate the allergic airway inflammation and lead to systemic uptake in extrapulmonary organs. These results indicate the very important need to investigate the upper limit of intranasally or inhalation exposure to nanosized TiO2 particles in occupational and environmental health policy.
Collapse
Affiliation(s)
- Shaza Abdulnasser Harfoush
- Department of Experimental Pneumology and Allergology, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology, and Preventive Dentistry, Saarland University, Homburg, Germany
| | - Duc Dung Le
- Department of Internal Medicine II, University Hospital, Interdisciplinary Center for Clinical Research Laboratory for Experimental Stem Cell Transplantation, Würzburg, Germany
| | - Sebastian Heck
- Department of Experimental Pneumology and Allergology, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Maximilian Leitner
- Department of Experimental Pneumology and Allergology, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Albert Joachim Omlor
- Department of Experimental Pneumology and Allergology, Faculty of Medicine, Saarland University, Homburg, Germany
- Department of Internal Medicine, Pneumology, Allergology, and Respiratory Critical Care Medicine, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Isabella Tavernaro
- Leibniz Institute for New Materials, Saarland University, Campus D2 2, D-66123, Saarbrücken, Germany
| | - Annette Kraegeloh
- Leibniz Institute for New Materials, Saarland University, Campus D2 2, D-66123, Saarbrücken, Germany
| | - Ralf Kautenburger
- Institute of Inorganic Solid State Chemistry, Campus Dudweiler, Saarland University, Saarbrücken, Germany
| | - Guido Kickelbick
- Institute of Inorganic Solid State Chemistry, Campus Dudweiler, Saarland University, Saarbrücken, Germany
| | - Andreas Beilhack
- Department of Internal Medicine II, University Hospital, Interdisciplinary Center for Clinical Research Laboratory for Experimental Stem Cell Transplantation, Würzburg, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University Hospital, Homburg, Germany
| | - Juliane Nguyen
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, New York, USA
| | - Martina Sester
- Transplant and Infection Immunology, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Robert Bals
- Department of Internal Medicine, Pneumology, Allergology, and Respiratory Critical Care Medicine, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Quoc Thai Dinh
- Department of Experimental Pneumology and Allergology, Faculty of Medicine, Saarland University, Homburg, Germany.
- Department of Internal Medicine, Pneumology, Allergology, and Respiratory Critical Care Medicine, Faculty of Medicine, Saarland University, Homburg, Germany.
| |
Collapse
|
32
|
Konstantinović J, Yahiaoui S, Alhayek A, Haupenthal J, Schönauer E, Andreas A, Kany AM, Müller R, Koehnke J, Berger FK, Bischoff M, Hartmann RW, Brandstetter H, Hirsch AKH. N-Aryl-3-mercaptosuccinimides as Antivirulence Agents Targeting Pseudomonas aeruginosa Elastase and Clostridium Collagenases. J Med Chem 2020; 63:8359-8368. [PMID: 32470298 PMCID: PMC7429951 DOI: 10.1021/acs.jmedchem.0c00584] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [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] [Indexed: 12/12/2022]
Abstract
![]()
In light of the global
antimicrobial-resistance crisis, there is
an urgent need for novel bacterial targets and antibiotics with novel
modes of action. It has been shown that Pseudomonas aeruginosa elastase (LasB) and Clostridium histolyticum (Hathewaya histolytica) collagenase (ColH) play a significant
role in the infection process and thereby represent promising antivirulence
targets. Here, we report novel N-aryl-3-mercaptosuccinimide
inhibitors that target both LasB and ColH, displaying potent activities in vitro and high selectivity for the bacterial over human
metalloproteases. Additionally, the inhibitors demonstrate no signs
of cytotoxicity against selected human cell lines and in a zebrafish
embryo toxicity model. Furthermore, the most active ColH inhibitor
shows a significant reduction of collagen degradation in an ex vivo pig-skin model.
Collapse
Affiliation(s)
- Jelena Konstantinović
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Germany
| | - Samir Yahiaoui
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Germany
| | - Alaa Alhayek
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Germany.,Department of Pharmacy, Saarland University, Campus Building E8.1, 66123 Saarbrücken, Germany
| | - Jörg Haupenthal
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Germany
| | - Esther Schönauer
- Department of Biosciences, University of Salzburg, Billrothstr. 11, 5020 Salzburg, Austria
| | - Anastasia Andreas
- Department of Microbial Natural Products, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Germany
| | - Andreas M Kany
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Germany
| | - Rolf Müller
- Department of Pharmacy, Saarland University, Campus Building E8.1, 66123 Saarbrücken, Germany.,Department of Microbial Natural Products, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Germany
| | - Jesko Koehnke
- Workgroup Structural Biology of Biosynthetic Enzymes, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Campus Building E8.1, 66123 Saarbrücken, Germany
| | - Fabian K Berger
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg/Saar, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg/Saar, Germany
| | - Rolf W Hartmann
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Germany.,Department of Pharmacy, Saarland University, Campus Building E8.1, 66123 Saarbrücken, Germany
| | - Hans Brandstetter
- Department of Biosciences, University of Salzburg, Billrothstr. 11, 5020 Salzburg, Austria
| | - Anna K H Hirsch
- Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), Campus Building E8.1, 66123 Saarbrücken, Germany.,Department of Pharmacy, Saarland University, Campus Building E8.1, 66123 Saarbrücken, Germany
| |
Collapse
|
33
|
Shi L, Stachon T, Latta L, Ibrahem Elhawy M, Gunaratnam G, Orosz E, Kiderlen AF, Seitz B, Bischoff M, Szentmáry N. The effect of antiamoebic agents and Ce6‐PDT on acanthamoeba castellani trophozoites and cysts, in vitro. Acta Ophthalmol 2019. [DOI: 10.1111/j.1755-3768.2019.5079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Lei Shi
- Department of Opthalmology Saarland university medical center Homburg/Saar Germany
| | - Tanja Stachon
- Department of Opthalmology Saarland university medical center Homburg/Saar Germany
| | - Lorenz Latta
- Department of Opthalmology Saarland university medical center Homburg/Saar Germany
| | | | - Gubesh Gunaratnam
- Institute for Medical Microbiology and Hygiene Saarland University Homburg Saar Germany
| | - Erika Orosz
- Department of Parasitology National Public Health Center Budapest Hungary
| | | | - Berthold Seitz
- Department of Opthalmology Saarland university medical center Homburg/Saar Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene Saarland University Homburg Saar Germany
| | - Nóra Szentmáry
- Department of Opthalmology Saarland university medical center Homburg/Saar Germany
| |
Collapse
|
34
|
Shi L, Stachon T, Latta L, Elhawy MI, Gunaratnam G, Orosz E, Kiderlen AF, Seitz B, Bischoff M, Szentmáry N. Comparison of in vitro assays to study the effectiveness of antiparasitics against Acanthamoeba castellani trophozoites and cysts. Acta Microbiol Immunol Hung 2019; 67:23-32. [PMID: 31833381 DOI: 10.1556/030.66.2019.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 05/19/2019] [Accepted: 07/12/2019] [Indexed: 12/11/2022]
Abstract
We aimed to compare LDH release assay, trypan blue and fluorescent stainings, and non-nutrient Escherichia coli plate assay in determining treatment efficacy of antiamoebic agents against Acanthamoeba castellanii trophozoites/cysts, in vitro. 1BU trophozoites/cysts were challenged with 0.02% polyhexamethylene biguanid (PHMB), 0.1% propamidine isethionate (PD), and 0.0065% miltefosine (MF). Efficacies of the drugs were determined by LDH release and trypan blue assays, by Hoechst 33343, calcein-AM, and ethidium homodimer-1 fluorescent dyes, and by a non-nutrient agar E. coli plate assay. All three antiamoebic agents induced a significant LDH release from trophozoites, compared to controls (p < 0.0001). Fluorescent-dye staining in untreated 1BU trophozoites/cysts was negligible, but using antiamoebic agents, there was 59.3%-100% trypan blue, 100% Hoechst 33342, 0%-75.3% calcein-AM, and 100% ethidium homodimer-1 positivity. On E. coli plates, in controls and MF-treated 1BU trophozoites/cysts, new trophozoites appeared within 24 h, encystment occurred after 5 weeks. In PHMB- and PD-treated 1BU throphozoites/cysts, irregularly shaped, smaller trophozoites appeared after 72 h, which failed to form new cysts within 5 weeks. None of the enzymatic- and dye-based viability assays tested here generated survival rates for trophozoites/cysts that were comparable with those yielded with the non-nutrient agar E. coli plate assay, suggesting that the culture-based assay is the best method to study the treatment efficacy of drugs against Acanthamoeba.
Collapse
Affiliation(s)
- Lei Shi
- Department of Ophthalmology, Saarland University Medical Center, Homburg/Saar, Germany
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, P. R. China
| | - Tanja Stachon
- Department of Ophthalmology, Saarland University Medical Center, Homburg/Saar, Germany
| | - Lorenz Latta
- Department of Ophthalmology, Saarland University Medical Center, Homburg/Saar, Germany
| | - Mohamed Ibrahem Elhawy
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg/Saar, Germany
| | - Gubesh Gunaratnam
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg/Saar, Germany
| | - Erika Orosz
- Department of Parasitology, National Public Health Center, Budapest, Hungary
| | | | - Berthold Seitz
- Department of Ophthalmology, Saarland University Medical Center, Homburg/Saar, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg/Saar, Germany
| | - Nóra Szentmáry
- Department of Ophthalmology, Saarland University Medical Center, Homburg/Saar, Germany
- Department of Ophthalmology, Semmelweis University, Budapest, Hungary
| |
Collapse
|
35
|
Haidar A, Ali AA, Veziroglu S, Fiutowski J, Eichler H, Müller I, Kiefer K, Faupel F, Bischoff M, Veith M, Aktas OC, Abdul-Khaliq H. PTFEP-Al 2O 3 hybrid nanowires reducing thrombosis and biofouling. Nanoscale Adv 2019; 1:4659-4664. [PMID: 36133130 PMCID: PMC9419761 DOI: 10.1039/c9na00436j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 10/15/2019] [Indexed: 06/12/2023]
Abstract
Thrombosis and bacterial infection are major problems in cardiovascular implants. Here we demonstrated that a superhydrophobic surface composed of poly(bis(2,2,2-trifluoroethoxy)phosphazene) (PTFEP)-Al2O3 hybrid nanowires (NWs) is effective to reduce both platelet adhesion/activation and bacterial adherence/colonization. The proposed approach allows surface modification of cardiovascular implants which have 3D complex geometries.
Collapse
Affiliation(s)
- Ayman Haidar
- Department of Paediatric Cardiology, Saarland University Building 9 66421 Homburg Germany
| | - Awadelkareem A Ali
- Department of Paediatric Cardiology, Saarland University Building 9 66421 Homburg Germany
| | - Salih Veziroglu
- Chair for Multicomponent Materials, Institute for Materials Science, Faculty of Engineering, Christian-Albrechts-University of Kiel Kaiserstr. 2 24143 Kiel Germany
| | - Jacek Fiutowski
- Mads Clausen Institute, NanoSYD, University of Southern Denmark Alsion 2 6400 Sønderborg Denmark
| | - Hermann Eichler
- Institute of Clinical Hemostaseology and Transfusion Medicine, Saarland University Building 1, Ringstr. 52 66421 Homburg Germany
| | - Isabelle Müller
- Institute of Clinical Hemostaseology and Transfusion Medicine, Saarland University Building 1, Ringstr. 52 66421 Homburg Germany
| | - Karin Kiefer
- Department of Paediatric Cardiology, Saarland University Building 9 66421 Homburg Germany
| | - Franz Faupel
- Chair for Multicomponent Materials, Institute for Materials Science, Faculty of Engineering, Christian-Albrechts-University of Kiel Kaiserstr. 2 24143 Kiel Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University Homburg/Saar 66421 Germany
| | - Michael Veith
- INM-Leibniz Institute for New Materials, Campus D2 2 Saarbrücken 66123 Germany
| | - Oral Cenk Aktas
- Department of Paediatric Cardiology, Saarland University Building 9 66421 Homburg Germany
- Chair for Multicomponent Materials, Institute for Materials Science, Faculty of Engineering, Christian-Albrechts-University of Kiel Kaiserstr. 2 24143 Kiel Germany
| | - Hashim Abdul-Khaliq
- Department of Paediatric Cardiology, Saarland University Building 9 66421 Homburg Germany
| |
Collapse
|
36
|
Bischoff M, Howland V, Klinger-König J, Tomczyk S, Schmidt S, Zygmunt M, Heckmann M, van den Berg N, Bethke B, Corleis J, Günther S, Liutkus K, Stentzel U, Neumann A, Penndorf P, Ludwig T, Hammer E, Winter T, Grabe HJ. Save the children by treating their mothers (PriVileG-M-study) - study protocol: a sequentially randomized controlled trial of individualized psychotherapy and telemedicine to reduce mental stress in pregnant women and young mothers and to improve Child's health. BMC Psychiatry 2019; 19:371. [PMID: 31775668 PMCID: PMC6880484 DOI: 10.1186/s12888-019-2279-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 09/10/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND As early as pregnancy, maternal mental stress impinges on the child's development and health. Thus, this may cause enhanced risk for premature birth, lowered fetal growth, and lower fetal birth weight as well as enhanced levels of the stress hormone cortisol and lowered levels of the bonding hormone oxytocin. Maternal stress further reduces maternal sensitivity for the child's needs which impairs the mother-child-interaction and bonding. Therefore, prevention and intervention studies on mental stress are necessary, beginning prenatally and applying rigorous research methodology, such as randomized controlled trials, to ensure high validity. METHODS A randomized controlled trial is used to assess the impact of psychotherapy and telemedicine on maternal mental stress and the child's mental and physical health. Mentally stressed pregnant women are randomized to an intervention (IG) and a not intervened control group. The IG receives an individualized psychotherapy starting prenatal and lasting for 10 months. Afterwards, a second randomization is used to investigate whether the use of telemedicine can stabilize the therapeutic effects. Using ecological momentary assessments and video recordings, the transfer into daily life, maternal sensitivity and mother-child-bonding are assessed. Psycho-biologically, the synchronicity of cortisol and oxytocin levels between mother and child are assessed as well as the peptidome of the colostrum and breast milk, which are assumed to be essential for the adaptation to the extra-uterine environment. All assessments are compared to an additional control group of healthy women. Finally, the results of the study will lead to the development of a qualification measure for health professionals to detect mental stress, to treat it with low-level interventions and to refer those women with high stress levels to mental health professionals. DISCUSSION The study aims to prevent the transgenerational transfer of psychiatric and somatic disorders from the mother to her child. The effects of the psychotherapy will be stabilized through telemedicine and long-term impacts on the child's and mothers' mental health are enhanced. The combination of psychotherapy, telemedicine and methodologies of ecological momentary assessment, video recording and bio banking are new in content-related and methodological manner. TRIAL REGISTRATION German Clinical Trials Register: DRKS00017065. Registered 02 May 2019. World Health Organization, Universal Trial Number: U1111-1230-9826. Registered 01 April 2019.
Collapse
Affiliation(s)
- M. Bischoff
- Department of Health and Prevention, Institute of Psychology, University Greifswald, Greifswald, Germany
| | - V. Howland
- Department of Neonatology and Paediatric Intensive Care, University Medicine Greifswald, Greifswald, Germany
| | - J. Klinger-König
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany
| | - S. Tomczyk
- Department of Health and Prevention, Institute of Psychology, University Greifswald, Greifswald, Germany
| | - S. Schmidt
- Department of Health and Prevention, Institute of Psychology, University Greifswald, Greifswald, Germany
| | - M. Zygmunt
- Clinic and Polyclinic for Obstetrics and Gynecology, University Medicine Greifswald, Greifswald, Germany
| | - M. Heckmann
- Department of Neonatology and Paediatric Intensive Care, University Medicine Greifswald, Greifswald, Germany
| | - N. van den Berg
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
| | - B. Bethke
- Department of Health, Nursing and Administration, University of Applied Sciences Neubrandenburg, Neubrandenburg, Germany
| | - J. Corleis
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany
| | - S. Günther
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany
| | - K. Liutkus
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany
| | - U. Stentzel
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
| | - A. Neumann
- Department of Health, Nursing and Administration, University of Applied Sciences Neubrandenburg, Neubrandenburg, Germany
| | - P. Penndorf
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
| | - T. Ludwig
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
| | - E. Hammer
- Department of Functional Genomics, Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - T. Winter
- Integrated Research Biobank, University Medicine Greifswald, Greifswald, Germany
| | - H. J. Grabe
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany
| |
Collapse
|
37
|
Anversa Dimer F, de Souza Carvalho-Wodarz C, Goes A, Cirnski K, Herrmann J, Schmitt V, Pätzold L, Abed N, De Rossi C, Bischoff M, Couvreur P, Müller R, Lehr CM. PLGA nanocapsules improve the delivery of clarithromycin to kill intracellular Staphylococcus aureus and Mycobacterium abscessus. Nanomedicine 2019; 24:102125. [PMID: 31751769 DOI: 10.1016/j.nano.2019.102125] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 09/16/2019] [Accepted: 11/05/2019] [Indexed: 11/29/2022]
Abstract
Drug delivery systems are promising for targeting antibiotics directly to infected tissues. To reach intracellular Staphylococcus aureus and Mycobacterium abscessus, we encapsulated clarithromycin in PLGA nanocapsules, suitable for aerosol delivery by nebulization of an aqueous dispersion. Compared to the same dose of free clarithromycin, nanoencapsulation reduced 1000 times the number of intracellular S. aureus in vitro. In RAW cells, while untreated S. aureus was located in acidic compartments, the treated ones were mostly situated in non-acidic compartments. Clarithromycin-nanocapsules were also effective against M. abscessus (70-80% killing efficacy). The activity of clarithromycin-nanocapsules against S. aureus was also confirmed in vivo, using a murine wound model as well as in zebrafish. The permeability of clarithromycin-nanocapsules across Calu-3 monolayers increased in comparison to the free drug, suggesting an improved delivery to sub-epithelial tissues. Thus, clarithromycin-nanocapsules are a promising strategy to target intracellular S. aureus and M. abscessus.
Collapse
Affiliation(s)
- Frantiescoli Anversa Dimer
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken, Germany
| | - Cristiane de Souza Carvalho-Wodarz
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken, Germany.
| | - Adriely Goes
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken, Germany; Department of Pharmacy, Saarland University, Saarbrücken, Germany
| | - Katarina Cirnski
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken, Germany; German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Hannover, Germany
| | - Jennifer Herrmann
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken, Germany; German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Hannover, Germany
| | - Viktoria Schmitt
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken, Germany; German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Hannover, Germany
| | - Linda Pätzold
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Nadia Abed
- Institut Galien Paris-Sud, UMR8612, Univ. Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France
| | - Chiara De Rossi
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Patrick Couvreur
- Institut Galien Paris-Sud, UMR8612, Univ. Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken, Germany; German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Hannover, Germany
| | - Claus-Michael Lehr
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken, Germany; Department of Pharmacy, Saarland University, Saarbrücken, Germany.
| |
Collapse
|
38
|
Spengler C, Nolle F, Mischo J, Faidt T, Grandthyll S, Thewes N, Koch M, Müller F, Bischoff M, Klatt MA, Jacobs K. Strength of bacterial adhesion on nanostructured surfaces quantified by substrate morphometry. Nanoscale 2019; 11:19713-19722. [PMID: 31599281 DOI: 10.1039/c9nr04375f] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Microbial adhesion and the subsequent formation of resilient biofilms at surfaces are decisively influenced by substrate properties, such as the topography. To date, studies that quantitatively link surface topography and bacterial adhesion are scarce, as both are not straightforward to quantify. To fill this gap, surface morphometry combined with single-cell force spectroscopy was performed on surfaces with irregular topographies on the nano-scale. As surfaces, hydrophobized silicon wafers were used that were etched to exhibit surface structures in the same size range as the bacterial cell wall molecules. The surface structures were characterized by a detailed morphometric analysis based on Minkowski functionals revealing both qualitatively similar features and quantitatively different extensions. We find that as the size of the nanostructures increases, the adhesion forces decrease in a way that can be quantified by the area of the surface that is available for the tethering of cell wall molecules. In addition, we observe a bactericidal effect, which is more pronounced on substrates with taller structures but does not influence adhesion. Our results can be used for a targeted development of 3D-structured materials for/against bio-adhesion. Moreover, the morphometric analysis can serve as a future gold standard for characterizing a broad spectrum of material structures.
Collapse
Affiliation(s)
- Christian Spengler
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Friederike Nolle
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Johannes Mischo
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Thomas Faidt
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Samuel Grandthyll
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Nicolas Thewes
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Marcus Koch
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Frank Müller
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, 66421 Homburg/Saar, Germany
| | - Michael Andreas Klatt
- Institute of Stochastics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Karin Jacobs
- Department of Experimental Physics, Saarland University, Campus E2 9, 66123 Saarbrücken, Germany.
| |
Collapse
|
39
|
Leuer L, Krill A, Wilkens H, Wagenpfeil G, Bischoff M, Meier C, Bals R, Tschernig T. The Phagocytosis of Blood Leukocytes from Cystic Fibrosis Patients is not Impaired in General. Lung 2019; 198:235-239. [PMID: 31707460 DOI: 10.1007/s00408-019-00290-9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 10/29/2019] [Indexed: 11/30/2022]
Abstract
Impaired phagocytosis of Pseudomonas aeruginosa was found in isolated monocytes of peripheral blood of cystic fibrosis patients, but not in their neutrophils, as reported some years ago. In the present study, we analysed the phagocytic capacity of peripheral blood neutrophils and monocytes of cystic fibrosis patients and of healthy controls. Phagocytosis was determined using a commercial phagocytosis "in whole blood" assay on the basis of fluorescence-labelled opsonized Escherichia coli bacteria and flow cytometry. Venous blood of cystic fibrosis patients and of healthy controls was collected and the phagocytosis assay was performed. No differences in the percentage of phagocytic cells or in the overall phagocytic capacity were found between samples of cystic fibrosis patients and healthy controls either in monocytes or in neutrophils. Thus, our results did not support the hypothesis of a generally reduced phagocytic ability in the peripheral blood immune cells of cystic fibrosis patients.
Collapse
Affiliation(s)
- Laura Leuer
- Institute for Anatomy and Cell Biology, Saarland University, Campus Homburg, Kirrberger Strasse, Building 61, 66424, Homburg/Saar, Germany
| | - Angelika Krill
- Clinic for Pulmonology, Saarland University, Campus Homburg, Homburg/Saar, Germany
| | - Heinrike Wilkens
- Clinic for Pulmonology, Saarland University, Campus Homburg, Homburg/Saar, Germany
| | - Gudrun Wagenpfeil
- Institute for Medical Biometry, Saarland University, Campus Homburg, Homburg/Saar, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, Campus Homburg, Homburg/Saar, Germany
| | - Carola Meier
- Institute for Anatomy and Cell Biology, Saarland University, Campus Homburg, Kirrberger Strasse, Building 61, 66424, Homburg/Saar, Germany
| | - Robert Bals
- Clinic for Pulmonology, Saarland University, Campus Homburg, Homburg/Saar, Germany
| | - Thomas Tschernig
- Institute for Anatomy and Cell Biology, Saarland University, Campus Homburg, Kirrberger Strasse, Building 61, 66424, Homburg/Saar, Germany.
| |
Collapse
|
40
|
Bufe B, Teuchert Y, Schmid A, Pyrski M, Pérez-Gómez A, Eisenbeis J, Timm T, Ishii T, Lochnit G, Bischoff M, Mombaerts P, Leinders-Zufall T, Zufall F. Bacterial MgrB peptide activates chemoreceptor Fpr3 in mouse accessory olfactory system and drives avoidance behaviour. Nat Commun 2019; 10:4889. [PMID: 31653840 PMCID: PMC6814738 DOI: 10.1038/s41467-019-12842-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 08/07/2019] [Accepted: 10/02/2019] [Indexed: 12/31/2022] Open
Abstract
Innate immune chemoreceptors of the formyl peptide receptor (Fpr) family are expressed by vomeronasal sensory neurons (VSNs) in the accessory olfactory system. Their biological function and coding mechanisms remain unknown. We show that mouse Fpr3 (Fpr-rs1) recognizes the core peptide motif f-MKKFRW that is predominantly present in the signal sequence of the bacterial protein MgrB, a highly conserved regulator of virulence and antibiotic resistance in Enterobacteriaceae. MgrB peptide can be produced and secreted by bacteria, and is selectively recognized by a subset of VSNs. Exposure to the peptide also stimulates VSNs in freely behaving mice and drives innate avoidance. Our data shows that Fpr3 is required for neuronal detection and avoidance of peptides derived from a conserved master virulence regulator of enteric bacteria.
Collapse
Affiliation(s)
- Bernd Bufe
- Center for Integrative Physiology and Molecular Medicine, Saarland University, 66424, Homburg, Germany.,Molecular Immunology Section, Faculty of Computer Science and Microsystems Engineering, University of Applied Sciences Kaiserslautern, Amerikastrasse 1, 66482, Zweibrücken, Germany
| | - Yannick Teuchert
- Center for Integrative Physiology and Molecular Medicine, Saarland University, 66424, Homburg, Germany
| | - Andreas Schmid
- Center for Integrative Physiology and Molecular Medicine, Saarland University, 66424, Homburg, Germany
| | - Martina Pyrski
- Center for Integrative Physiology and Molecular Medicine, Saarland University, 66424, Homburg, Germany
| | - Anabel Pérez-Gómez
- Center for Integrative Physiology and Molecular Medicine, Saarland University, 66424, Homburg, Germany.,Department of Molecular Medicine, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Janina Eisenbeis
- Institute for Medical Microbiology and Hygiene, Saarland University, 66424, Homburg, Germany
| | - Thomas Timm
- Protein Analytics, Institute of Biochemistry, Faculty of Medicine, Justus-Liebig-University Giessen, Friedrichstrasse 24, 35392, Giessen, Germany
| | - Tomohiro Ishii
- Max Planck Research Unit for Neurogenetics, Max-von-Laue-Strasse 4, 60438, Frankfurt, Germany.,Department of Cell Biology, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Günter Lochnit
- Protein Analytics, Institute of Biochemistry, Faculty of Medicine, Justus-Liebig-University Giessen, Friedrichstrasse 24, 35392, Giessen, Germany
| | - Markus Bischoff
- Institute for Medical Microbiology and Hygiene, Saarland University, 66424, Homburg, Germany
| | - Peter Mombaerts
- Max Planck Research Unit for Neurogenetics, Max-von-Laue-Strasse 4, 60438, Frankfurt, Germany
| | - Trese Leinders-Zufall
- Center for Integrative Physiology and Molecular Medicine, Saarland University, 66424, Homburg, Germany
| | - Frank Zufall
- Center for Integrative Physiology and Molecular Medicine, Saarland University, 66424, Homburg, Germany.
| |
Collapse
|
41
|
Müller L, Bischoff M, Tschernig T. UV-C Irradiation Reduces the Experimentally Induced Bacterial Load on the Surface of a Human Cadaver: An Additional Option for the Preservation of Cadavers in Anatomy. Clin Anat 2019; 33:113-116. [PMID: 31576617 DOI: 10.1002/ca.23481] [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: 06/25/2019] [Revised: 08/19/2019] [Accepted: 09/14/2019] [Indexed: 11/07/2022]
Abstract
Safety is a major issue in the embalming procedures of human cadavers. Reduced application of formaldehyde is often recommended. The aim of this study was to investigate the potency of ultraviolet light (UV-C irradiation) on the bacterial load on the surface of a conserved human cadaver. To test UV-C irradiation, the cadaver was laid out in the dissection hall and, after preparation of the muscles, was covered with linen sheets moistened with water. Swabs of the surface and microbiological analysis revealed sporadic bacterial colonies. The surface area was then spiked with bacteria and irradiated by a UV lamp for 15 or 60 min. Half of the area was covered by aluminum foil to serve as a control. After exposition, swabs were taken and analyzed. The exposition had reduced the number of colonies to one third (15 min exposition) and to one tenth (60 min exposition) of the control area. Thus, UV-C irradiation could be used in the preservation of cadavers without chemical pollution of the environment and without any risk for the employees. Clin. Anat. 32:113-116, 2019. © 2019 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Lea Müller
- Institute of Anatomy and Cell Biology, Medical Faculty, Saarland University, Homburg/Saar, Germany
| | - Markus Bischoff
- Institute of Microbiology and Hygiene, Medical Faculty, Saarland University, Homburg/Saar, Germany
| | - Thomas Tschernig
- Institute of Anatomy and Cell Biology, Medical Faculty, Saarland University, Homburg/Saar, Germany
| |
Collapse
|
42
|
Berger FK, Mellmann A, von Müller L, Bischoff M, Gärtner BC. Quality assurance for genotyping and resistance testing of Clostridium (Clostridioides) difficile isolates - Experiences from the first inter-laboratory ring trial in four German speaking countries. Anaerobe 2019; 61:102093. [PMID: 31494260 DOI: 10.1016/j.anaerobe.2019.102093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 06/25/2019] [Revised: 08/29/2019] [Accepted: 08/29/2019] [Indexed: 01/05/2023]
Abstract
Clostridium (Clostridioides) difficile is a major cause of nosocomial diarrhoea. A first inter-laboratory ring trial was performed in four European countries to evaluate the genotyping and antibiotic susceptibility testing (AST) accuracy. Six C. difficile isolates representing the epidemiologic important ribotypes (RT), RT001, RT002, RT010, RT014, RT027, and RT078 were blinded and send to 21 participating laboratories. Participants tested the samples with their genotyping and AST methods in use for concordance with reference. A total of 21 genotyping- and 14 antimicrobial susceptibility data sets were obtained. Ribotyping (11 participants) correctly identified most RTs (median 91% concordance rate) except for RT002, which was misidentified in 4/11 reports. However, this isolate was correctly asserted to RT002 after an update of a publicly available ribotyping database. Multilocus sequence typing, surface layer sequence typing, DNA microarray based genotyping, and whole genome sequencing, which were used by 1-3 participants, identified all six isolates correctly. AST was done by epsilometry by the participants and compared to agar dilution data determined by the coordinating reference centre. Susceptibilities against metronidazole, moxifloxacin, and vancomycin were correctly identified in 235 of 237 cases and in accordance to agar dilution as the gold standard. Genotyping of the C. difficile test strains revealed a remarkable high concordance on the level of ribotypes with a wide variety of methods. Epsilometry appears to be a reliable method for AST of C. difficile isolates in routine clinical microbiology laboratories.
Collapse
Affiliation(s)
- Fabian K Berger
- German National Reference Center for Clostridioides (Clostridium) difficile, Germany; Institute of Medical Microbiology and Hygiene, University of Saarland, Kirrberger Straße, Building 43, 66424, Homburg/Saar, Germany.
| | - Alexander Mellmann
- German National Reference Center for Clostridioides (Clostridium) difficile, Germany; Institute of Hygiene, University Hospital Münster, Robert-Koch-Straße 41, 48149, Münster, Germany
| | - Lutz von Müller
- German National Reference Center for Clostridioides (Clostridium) difficile, Germany; Institute of Medical Microbiology and Hygiene, University of Saarland, Kirrberger Straße, Building 43, 66424, Homburg/Saar, Germany; Institute for Laboratory Medicine, Microbiology and Hygiene, Christophorus Kliniken, Südwall 22, 48653, Coesfeld, Germany
| | - Markus Bischoff
- German National Reference Center for Clostridioides (Clostridium) difficile, Germany; Institute of Medical Microbiology and Hygiene, University of Saarland, Kirrberger Straße, Building 43, 66424, Homburg/Saar, Germany
| | - Barbara C Gärtner
- German National Reference Center for Clostridioides (Clostridium) difficile, Germany; Institute of Medical Microbiology and Hygiene, University of Saarland, Kirrberger Straße, Building 43, 66424, Homburg/Saar, Germany
| | | |
Collapse
|
43
|
Menina S, Eisenbeis J, Kamal MAM, Koch M, Bischoff M, Gordon S, Loretz B, Lehr C. Bioinspired Liposomes for Oral Delivery of Colistin to Combat Intracellular Infections by Salmonella enterica. Adv Healthc Mater 2019; 8:e1900564. [PMID: 31328434 DOI: 10.1002/adhm.201900564] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [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: 05/03/2019] [Revised: 06/27/2019] [Indexed: 01/07/2023]
Abstract
Bacterial invasion into eukaryotic cells and the establishment of intracellular infection has proven to be an effective means of resisting antibiotic action, as anti-infective agents commonly exhibit a poor permeability across the host cell membrane. Encapsulation of anti-infectives into nanoscaled delivery systems, such as liposomes, is shown to result in an enhancement of intracellular delivery. The aim of the current work is, therefore, to formulate colistin, a poorly permeable anti-infective, into liposomes suitable for oral delivery, and to functionalize these carriers with a bacteria-derived invasive moiety to enhance their intracellular delivery. Different combinations of phospholipids and cholesterol are explored to optimize liposomal drug encapsulation and stability in biorelevant media. These liposomes are then surface-functionalized with extracellular adherence protein (Eap), derived from Staphylococcus aureus. Treatment of HEp-2 and Caco-2 cells infected with Salmonella enterica using colistin-containing, Eap-functionalized liposomes resulted in a significant reduction of intracellular bacteria, in comparison to treatment with nonfunctionalized liposomes as well as colistin alone. This indicates that such bio-invasive carriers are able to facilitate intracellular delivery of colistin, as necessary for intracellular anti-infective activity. The developed Eap-functionalized liposomes, therefore, present a promising strategy for improving the therapy of intracellular infections.
Collapse
Affiliation(s)
- Sara Menina
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)Helmholtz Center for Infection Research (HZI) Saarbrücken 66123 Germany
- Department of PharmacySaarland University Saarbrücken 66123 Germany
| | - Janina Eisenbeis
- Institute of Medical Microbiology and HygieneSaarland University Homburg 66421 Germany
| | - Mohamed Ashraf M. Kamal
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)Helmholtz Center for Infection Research (HZI) Saarbrücken 66123 Germany
| | - Marcus Koch
- Institute for New MaterialsSaarland University Saarbrücken 66123 Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and HygieneSaarland University Homburg 66421 Germany
| | - Sarah Gordon
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)Helmholtz Center for Infection Research (HZI) Saarbrücken 66123 Germany
- School of Pharmacy and Biomolecular SciencesJohn Moores University Liverpool L3 3AF UK
| | - Brigitta Loretz
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)Helmholtz Center for Infection Research (HZI) Saarbrücken 66123 Germany
| | - Claus‐Michael Lehr
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS)Helmholtz Center for Infection Research (HZI) Saarbrücken 66123 Germany
- Department of PharmacySaarland University Saarbrücken 66123 Germany
| |
Collapse
|
44
|
Galata V, Backes C, Laczny CC, Hemmrich-Stanisak G, Li H, Smoot L, Posch AE, Schmolke S, Bischoff M, von Müller L, Plum A, Franke A, Keller A. Comparing genome versus proteome-based identification of clinical bacterial isolates. Brief Bioinform 2019; 19:495-505. [PMID: 28013236 DOI: 10.1093/bib/bbw122] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Indexed: 11/14/2022] Open
Abstract
Whole-genome sequencing (WGS) is gaining importance in the analysis of bacterial cultures derived from patients with infectious diseases. Existing computational tools for WGS-based identification have, however, been evaluated on previously defined data relying thereby unwarily on the available taxonomic information.Here, we newly sequenced 846 clinical gram-negative bacterial isolates representing multiple distinct genera and compared the performance of five tools (CLARK, Kaiju, Kraken, DIAMOND/MEGAN and TUIT). To establish a faithful 'gold standard', the expert-driven taxonomy was compared with identifications based on matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry (MS) analysis. Additionally, the tools were also evaluated using a data set of 200 Staphylococcus aureus isolates.CLARK and Kraken (with k =31) performed best with 626 (100%) and 193 (99.5%) correct species classifications for the gram-negative and S. aureus isolates, respectively. Moreover, CLARK and Kraken demonstrated highest mean F-measure values (85.5/87.9% and 94.4/94.7% for the two data sets, respectively) in comparison with DIAMOND/MEGAN (71 and 85.3%), Kaiju (41.8 and 18.9%) and TUIT (34.5 and 86.5%). Finally, CLARK, Kaiju and Kraken outperformed the other tools by a factor of 30 to 170 fold in terms of runtime.We conclude that the application of nucleotide-based tools using k-mers-e.g. CLARK or Kraken-allows for accurate and fast taxonomic characterization of bacterial isolates from WGS data. Hence, our results suggest WGS-based genotyping to be a promising alternative to the MS-based biotyping in clinical settings. Moreover, we suggest that complementary information should be used for the evaluation of taxonomic classification tools, as public databases may suffer from suboptimal annotations.
Collapse
Affiliation(s)
- Valentina Galata
- Chair for Clinical Bioinformatics, Saarland University, Campus Building E2.1, 66123 Saarbrücken, Germany
| | - Christina Backes
- Chair for Clinical Bioinformatics, Saarland University, Campus Building E2.1, 66123 Saarbrücken, Germany
| | - Cédric Christian Laczny
- Chair for Clinical Bioinformatics, Saarland University, Campus Building E2.1, 66123 Saarbrücken, Germany
| | - Georg Hemmrich-Stanisak
- Institute of Clinical Molecular Biology, Christian Albrechts University of Kiel, Schittenhelmstr. 12, 24105 Kiel, Germany
| | - Howard Li
- Siemens Healthcare, R&D, 725 Potter Street, Berkeley, CA 94710, USA
| | - Laura Smoot
- Siemens Healthcare, R&D, 1584 Enterprise Blvd., West Sacramento, CA 95691, USA
| | - Andreas Emanuel Posch
- Siemens Healthcare GmbH, Strategy and Innovation, Hartmannstr. 16, 91052 Erlangen, Germany
| | - Susanne Schmolke
- Siemens Healthcare GmbH, Strategy and Innovation, Hartmannstr. 16, 91052 Erlangen, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, Kirrberger Straße, Campus Building 43, 66421 Homburg/Saar, Germany
| | - Lutz von Müller
- Institute of Medical Microbiology and Hygiene, Saarland University, Kirrberger Straße, Campus Building 43, 66421 Homburg/Saar, Germany
| | - Achim Plum
- Curetis GmbH, Max-Eyth-Str. 42, 71088 Holzgeringen, Germany
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian Albrechts University of Kiel, Schittenhelmstr. 12, 24105 Kiel, Germany
| | - Andreas Keller
- Chair for Clinical Bioinformatics, Saarland University, Campus Building E2.1, 66123 Saarbrücken, Germany
| |
Collapse
|
45
|
Berger FK, Gfrörer S, Becker SL, Baldan R, Cirillo DM, Frentrup M, Steglich M, Engling P, Nübel U, Mellmann A, Bischoff M, Gärtner B, von Müller L. Hospital outbreak due to Clostridium difficile ribotype 018 (RT018) in Southern Germany. Int J Med Microbiol 2019; 309:189-193. [PMID: 30879971 DOI: 10.1016/j.ijmm.2019.03.001] [Citation(s) in RCA: 15] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 02/18/2019] [Accepted: 03/04/2019] [Indexed: 02/06/2023] Open
Abstract
Clostridium (Clostridioides) difficile is the main cause of nosocomial diarrhoea. Ribotype 018 (RT018) has been recognized as the predominant strain responsible for C. difficile infection (CDI) in Italy, whereas in most other European countries only sporadic RT018 cases occur. Between August and October 2015, a suspected C. difficile outbreak at two associated hospitals in Southern Germany was investigated by comprehensive molecular typing. Surprisingly, RT018 was detected in 9/82 CDI patients, which has never been described before in a German outbreak. Phenotypic analysis revealed fluoroquinolone and macrolide resistance. Genetic subtyping using multiple-locus variable-number tandem-repeat analysis (MLVA) and whole genome sequencing (WGS) was performed and outbreak isolates were directly compared to sporadic German RT018 isolates and to epidemic ones from Milan, Northern Italy. Molecular typing confirmed a hospital outbreak with closely related RT018 isolates. Both, MLVA and WGS revealed high similarity of outbreak strains with epidemic isolates from Italy, but low similarity to other German isolates. Comparison between both typing strategies showed that ribotyping in combination with MLVA was appropriate to identify related isolates and clonal complexes, whereas WGS provided a better discrimination with more detailed information about the phylogenetic relationship of isolates. This is the first hospital outbreak in Germany presumably caused by cross-national transmission of an Italian epidemic RT018 strain.
Collapse
Affiliation(s)
- Fabian K Berger
- Institute of Medical Microbiology and Hygiene, National Reference Centre for Clostridium difficile, Saarland University, Kirrberger Straße, Building 43, 66421 Homburg, Saar, Germany.
| | - Sabine Gfrörer
- Regionale Kliniken Holding RKH GmbH, Ludwigsburg, Germany
| | - Sören L Becker
- Institute of Medical Microbiology and Hygiene, National Reference Centre for Clostridium difficile, Saarland University, Kirrberger Straße, Building 43, 66421 Homburg, Saar, Germany; Swiss Tropical and Public Health Institute, P.O. Box, CH-4002 Basel, Switzerland; University of Basel, P.O. Box, CH-4003 Basel, Switzerland
| | - Rossella Baldan
- Emerging Bacterial Pathogens Unit, Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Via Olgettina Milano 60, 20132 Italy
| | - Daniela Maria Cirillo
- Emerging Bacterial Pathogens Unit, Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Via Olgettina Milano 60, 20132 Italy
| | | | - Matthias Steglich
- Leibniz Institute DSMZ, Inhoffenstraße 7B, 38124 Braunschweig, Germany; German Centre for Infection Research (DZIF), Partner site Braunschweig-Hannover, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Pit Engling
- Leibniz Institute DSMZ, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Ulrich Nübel
- Leibniz Institute DSMZ, Inhoffenstraße 7B, 38124 Braunschweig, Germany; German Centre for Infection Research (DZIF), Partner site Braunschweig-Hannover, Inhoffenstraße 7, 38124 Braunschweig, Germany; Braunschweig Integrated Centre of Systems Biology (BRICS), Technical University Braunschweig, Rebenring 56, 38106 Braunschweig, Germany
| | - Alexander Mellmann
- Institute of Hygiene, University Hospital Münster, National Reference Centre for Clostridium difficile, Robert-Koch-Straße 41, 48149 Münster, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, National Reference Centre for Clostridium difficile, Saarland University, Kirrberger Straße, Building 43, 66421 Homburg, Saar, Germany
| | - Barbara Gärtner
- Institute of Medical Microbiology and Hygiene, National Reference Centre for Clostridium difficile, Saarland University, Kirrberger Straße, Building 43, 66421 Homburg, Saar, Germany
| | - Lutz von Müller
- Institute of Medical Microbiology and Hygiene, National Reference Centre for Clostridium difficile, Saarland University, Kirrberger Straße, Building 43, 66421 Homburg, Saar, Germany; Institute for Laboratory Medicine, Microbiology and Hygiene, National Reference Centre for Clostridium difficile, Christophorus Kliniken, Südwall 22, 48653 Coesfeld, Germany
| |
Collapse
|
46
|
Amireault S, Baier JM, Bischoff M. LIKABLE PHYSICAL ACTIVITIES TO CHOOSE WHEN GIVEN THE OPPORTUNITY: PREFERENCES FOR PHYSICAL ACTIVITY IN OLDER ADULTS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- S Amireault
- Purdue University, West Lafayette, Indiana, United States
| | - J M Baier
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN 47907, USA
| | - M Bischoff
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN 47907, USA
| |
Collapse
|
47
|
Gannoun-Zaki L, Pätzold L, Huc-Brandt S, Baronian G, Elhawy MI, Gaupp R, Martin M, Blanc-Potard AB, Letourneur F, Bischoff M, Molle V. PtpA, a secreted tyrosine phosphatase from Staphylococcus aureus, contributes to virulence and interacts with coronin-1A during infection. J Biol Chem 2018; 293:15569-15580. [PMID: 30131335 DOI: 10.1074/jbc.ra118.003555] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [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: 04/20/2018] [Revised: 08/16/2018] [Indexed: 11/06/2022] Open
Abstract
Secretion of bacterial signaling proteins and adaptation to the host, especially during infection, are processes that are often linked in pathogenic bacteria. The human pathogen Staphylococcus aureus is equipped with a large arsenal of immune-modulating factors, allowing it to either subvert the host immune response or to create permissive niches for its survival. Recently, we showed that one of the low-molecular-weight protein tyrosine phosphatases produced by S. aureus, PtpA, is secreted during growth. Here, we report that deletion of ptpA in S. aureus affects intramacrophage survival and infectivity. We also observed that PtpA is secreted during macrophage infection. Immunoprecipitation assays identified several host proteins as putative intracellular binding partners for PtpA, including coronin-1A, a cytoskeleton-associated protein that is implicated in a variety of cellular processes. Of note, we demonstrated that coronin-1A is phosphorylated on tyrosine residues upon S. aureus infection and that its phosphorylation profile is linked to PtpA expression. Our results confirm that PtpA has a critical role during infection as a bacterial effector protein that counteracts host defenses.
Collapse
Affiliation(s)
- Laila Gannoun-Zaki
- From the Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS, UMR 5235, Montpellier 34000, France and
| | - Linda Pätzold
- the Institute of Medical Microbiology and Hygiene, University of Saarland, 66421 Homburg/Saar, Germany
| | - Sylvaine Huc-Brandt
- From the Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS, UMR 5235, Montpellier 34000, France and
| | - Grégory Baronian
- From the Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS, UMR 5235, Montpellier 34000, France and
| | - Mohamed Ibrahem Elhawy
- the Institute of Medical Microbiology and Hygiene, University of Saarland, 66421 Homburg/Saar, Germany
| | - Rosmarie Gaupp
- the Institute of Medical Microbiology and Hygiene, University of Saarland, 66421 Homburg/Saar, Germany
| | - Marianne Martin
- From the Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS, UMR 5235, Montpellier 34000, France and
| | - Anne-Béatrice Blanc-Potard
- From the Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS, UMR 5235, Montpellier 34000, France and
| | - François Letourneur
- From the Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS, UMR 5235, Montpellier 34000, France and
| | - Markus Bischoff
- the Institute of Medical Microbiology and Hygiene, University of Saarland, 66421 Homburg/Saar, Germany
| | - Virginie Molle
- From the Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Université de Montpellier, CNRS, UMR 5235, Montpellier 34000, France and
| |
Collapse
|
48
|
Eisenbeis J, Saffarzadeh M, Peisker H, Jung P, Thewes N, Preissner KT, Herrmann M, Molle V, Geisbrecht BV, Jacobs K, Bischoff M. The Staphylococcus aureus Extracellular Adherence Protein Eap Is a DNA Binding Protein Capable of Blocking Neutrophil Extracellular Trap Formation. Front Cell Infect Microbiol 2018; 8:235. [PMID: 30038902 PMCID: PMC6047304 DOI: 10.3389/fcimb.2018.00235] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 06/19/2018] [Indexed: 01/07/2023] Open
Abstract
The extracellular adherence protein (Eap) of Staphylococcus aureus is a secreted protein known to exert a number of adhesive and immunomodulatory properties. Here we describe the intrinsic DNA binding activity of this multifunctional secretory factor. By using atomic force microscopy, we provide evidence that Eap can bind and aggregate DNA. While the origin of the DNA substrate (e.g., eukaryotic, bacterial, phage, and artificial DNA) seems to not be of major importance, the DNA structure (e.g., linear or circular) plays a critical role with respect to the ability of Eap to bind and condense DNA. Further functional assays corroborated the nature of Eap as a DNA binding protein, since Eap suppressed the formation of "neutrophil extracellular traps" (NETs), composed of DNA-histone scaffolds, which are thought to function as a neutrophil-mediated extracellular trapping mechanism. The DNA binding and aggregation activity of Eap may thereby protect S. aureus against a specific anti-microbial defense reaction from the host.
Collapse
Affiliation(s)
- Janina Eisenbeis
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Mona Saffarzadeh
- Department of Biochemistry, Medical Faculty, Justus-Liebig-University, Giessen, Germany
| | - Henrik Peisker
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Philipp Jung
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Nicolas Thewes
- Experimental Physics, Saarland University, Saarbrücken, Germany
| | - Klaus T. Preissner
- Department of Biochemistry, Medical Faculty, Justus-Liebig-University, Giessen, Germany
| | - Mathias Herrmann
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Virginie Molle
- Laboratoire de Dynamique des Interactions Membranaires Normales et Pathologiques, Centre National de la Recherche Scientifique, UMR 5235, Université de Montpellier, Montpellier, France
| | - Brian V. Geisbrecht
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS, United States
| | - Karin Jacobs
- Experimental Physics, Saarland University, Saarbrücken, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| |
Collapse
|
49
|
Alabi A, Kazimoto T, Lebughe M, Vubil D, Phaku P, Mandomando I, Kern WV, Abdulla S, Mellmann A, Peitzmann L, Bischoff M, Peters G, Herrmann M, Grobusch MP, Schaumburg F, Rieg S. Management of superficial and deep-seated Staphylococcus aureus skin and soft tissue infections in sub-Saharan Africa: a post hoc analysis of the StaphNet cohort. Infection 2018; 46:395-404. [PMID: 29667040 DOI: 10.1007/s15010-018-1140-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 01/24/2018] [Accepted: 04/12/2018] [Indexed: 10/17/2022]
Abstract
PURPOSE The incidence of Staphylococcus aureus skin and soft tissue infection (SSTI) is high in sub-Saharan Africa. This is fueled by a high prevalence of Panton-Valentine leukocidin (PVL), which can be associated with necrotizing disease. The aim was to describe the clinical presentation and the treatment of SSTI in the African setting and to identify challenges in the management. METHODS Patients (n = 319) were recruited in DR Congo (n = 56, 17.6%), Gabon (n = 89, 27.9%), Mozambique (n = 79, 24.8%) and Tanzania (n = 95, 29.8%) during the prospective observational StaphNet cohort study (2010-2015). A physician recorded the clinical management in standardized questionnaires and stratified the entity of SSTI into superficial (sSSTI) or deep-seated (dSSTI). Selected virulence factors (PVL, β hemolysin) and multilocus sequence types (MLST) were extracted from whole genome sequencing data. RESULTS There were 220/319 (69%) sSSTI and 99/319 (31%) dSSTI. Compared to sSSTI, patients with dSSTI were more often hospitalized (13.2 vs. 23.5%, p = 0.03), HIV-positive (7.6 vs. 15.9%, p = 0.11), and required more often incision and drainage (I&D, 45.5 vs. 76.5%, p = 0.04). The proportion of an adequate antimicrobial therapy increased marginally from day 1 (empirical therapy) to day 3 (definite therapy), for sSSTI (70.7 to 72.4%) and dSSTI (55.4 to 58.9%). PVL was a risk factor for I&D (OR = 1.7, p = 0.02) and associated with MLST clonal complex CC121 (OR = 2.7, p < 0.001). CONCLUSION Appropriate antimicrobial agents and surgical services to perform I&D were available for the majority of patients. Results from susceptibility testing should be considered more efficiently in the selection of antimicrobial therapy.
Collapse
Affiliation(s)
- Abraham Alabi
- Centre de Recherches Médicales de Lambaréné (CERMEL), Albert Schweitzer Hospital, Lambaréné, Gabon.,Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany.,German Centre for Infection Research (DZIF), Partner Site Tübingen, Tübingen, Germany
| | | | - Marthe Lebughe
- Institut National de Recherche Bio-Médicale (INRB), Université de Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Delfino Vubil
- Manhiça Health Research Center, Manhiça, Maputo, Mozambique
| | - Patrick Phaku
- Institut National de Recherche Bio-Médicale (INRB), Université de Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Inacio Mandomando
- Manhiça Health Research Center, Manhiça, Maputo, Mozambique.,Instituto Nacional de Saúde, Ministério da Saúde, Maputo, Mozambique
| | - Winfried V Kern
- Division of Infectious Diseases, Department of Medicine II, Medical Center, University of Freiburg Faculty of Medicine, University of Freiburg, 79106, Freiburg, Germany
| | - Salim Abdulla
- Ifakara Health Institute (IHI), Dar es Salaam, Tanzania
| | | | - Lena Peitzmann
- Institute of Hygiene, University Hospital Münster, Münster, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, Homburg, Germany
| | - Georg Peters
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | - Mathias Herrmann
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | - Martin P Grobusch
- Centre de Recherches Médicales de Lambaréné (CERMEL), Albert Schweitzer Hospital, Lambaréné, Gabon.,Institut für Tropenmedizin, Eberhard Karls Universität, Tübingen, Germany.,German Centre for Infection Research (DZIF), Partner Site Tübingen, Tübingen, Germany.,Division of Internal Medicine, Department of Infectious Diseases, Center of Tropical Medicine and Travel Medicine, University of Amsterdam, Amsterdam, The Netherlands
| | - Frieder Schaumburg
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany.
| | - Siegbert Rieg
- Division of Infectious Diseases, Department of Medicine II, Medical Center, University of Freiburg Faculty of Medicine, University of Freiburg, 79106, Freiburg, Germany
| |
Collapse
|
50
|
Berger FK, Rasheed SS, Araj GF, Mahfouz R, Rimmani HH, Karaoui WR, Sharara AI, Dbaibo G, Becker SL, von Müller L, Bischoff M, Matar GM, Gärtner B. Molecular characterization, toxin detection and resistance testing of human clinical Clostridium difficile isolates from Lebanon. Int J Med Microbiol 2018; 308:358-363. [PMID: 29478838 DOI: 10.1016/j.ijmm.2018.01.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [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: 11/07/2017] [Revised: 01/09/2018] [Accepted: 01/19/2018] [Indexed: 01/05/2023] Open
Abstract
Clostridium (Clostridioides) difficile is the main cause for nosocomial diarrhoea in industrialised nations. Epidemiologic data on the pathogen's occurrence in other world regions are still scarce. In this context we characterized with phenotypic and molecular genetic methods C. difficile isolates stemming from hospitalised patients with diarrhoea in Lebanon. From 129 stool samples of symptomatic patients at a tertiary care University hospital in Lebanon, a total of 107 C. difficile strains were cultivated and underwent ribotyping, toxin gene detection and antibiotic resistance testing. Ribotype 014 (RT014, 16.8%) predominated, followed by RT002 (9.3%), RT106 (8.4%) and RT070 (6.5%). Binary toxin gene-positive isolates (RT023, RT078 and RT126) were rarely detected and RT027 was absent. Interestingly, within one isolate only the toxin A gene (tcdA) was detected. Multiple-locus variable-number tandem repeat analysis (MLVA) revealed strong strain diversity in most RTs. The isolates were sensitive to metronidazole and vancomycin, and only a small proportion of strains displayed resistance against moxifloxacin, rifampicin, and clarithromycin (5.6%, 1.9%, and 2.8%), respectively. The data indicate that the genetic strain composition of Lebanese strains differs markedly from the situation seen in Europe and North America. Especially the epidemic RTs seen in the latter regions were almost absent in Lebanon. Interestingly, most strains showed almost no resistance to commonly used antibiotics that are suspected to play a major role in the development of C. difficile infection, despite frequent use of these antibiotics in Lebanon. Thus, the role of antimicrobial resistance as a major driving force for infection development remains uncertain in this area.
Collapse
Affiliation(s)
- Fabian K Berger
- Institute of Medical Microbiology and Hygiene, National Reference Laboratory for Clostridium difficile, Saarland University, Kirrberger Straße, Building 43, 66421 Homburg/Saar, Germany.
| | - Sari S Rasheed
- Center for Infectious Diseases Research, American University of Beirut Medical Center, Riad El-Solh 1107, 2020, Beirut, Lebanon; Department of Experimental Pathology, Immunology, and Microbiology, American University of Beirut Medical Center, Riad El-Solh 1107, 2020, Beirut, Lebanon
| | - George F Araj
- Center for Infectious Diseases Research, American University of Beirut Medical Center, Riad El-Solh 1107, 2020, Beirut, Lebanon; Department of Pathology and Lab Medicine, American University of Beirut Medical Center, Riad El-Solh 1107, 2020, Beirut, Lebanon
| | - Rami Mahfouz
- Center for Infectious Diseases Research, American University of Beirut Medical Center, Riad El-Solh 1107, 2020, Beirut, Lebanon; Department of Pathology and Lab Medicine, American University of Beirut Medical Center, Riad El-Solh 1107, 2020, Beirut, Lebanon
| | - Hussein H Rimmani
- Department of Internal Medicine, American University of Beirut Medical Center, Riad El-Solh 1107, 2020, Beirut, Lebanon
| | - Walid R Karaoui
- Department of Internal Medicine, American University of Beirut Medical Center, Riad El-Solh 1107, 2020, Beirut, Lebanon
| | - Ala I Sharara
- Department of Internal Medicine, American University of Beirut Medical Center, Riad El-Solh 1107, 2020, Beirut, Lebanon
| | - Ghassan Dbaibo
- Center for Infectious Diseases Research, American University of Beirut Medical Center, Riad El-Solh 1107, 2020 Beirut, Lebanon
| | - Sören L Becker
- Institute of Medical Microbiology and Hygiene, National Reference Laboratory for Clostridium difficile, Saarland University, Kirrberger Straße, Building 43, 66421 Homburg/Saar, Germany; Swiss Tropical and Public Health Institute, P.O. Box, CH-4002 Basel, Switzerland; University of Basel, P.O. Box, CH-4003 Basel, Switzerland
| | - Lutz von Müller
- Institute of Medical Microbiology and Hygiene, National Reference Laboratory for Clostridium difficile, Saarland University, Kirrberger Straße, Building 43, 66421 Homburg/Saar, Germany; Institute for Laboratory Medicine, Microbiology and Hygiene, Christophorus Kliniken, Südwall 22, 48653, Coesfeld, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, National Reference Laboratory for Clostridium difficile, Saarland University, Kirrberger Straße, Building 43, 66421 Homburg/Saar, Germany
| | - Ghassan M Matar
- Center for Infectious Diseases Research, American University of Beirut Medical Center, Riad El-Solh 1107, 2020, Beirut, Lebanon; Department of Experimental Pathology, Immunology, and Microbiology, American University of Beirut Medical Center, Riad El-Solh 1107, 2020, Beirut, Lebanon
| | - Barbara Gärtner
- Institute of Medical Microbiology and Hygiene, National Reference Laboratory for Clostridium difficile, Saarland University, Kirrberger Straße, Building 43, 66421 Homburg/Saar, Germany
| |
Collapse
|