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Kraupner N, Hutinel M, Schumacher K, Gray DA, Genheden M, Fick J, Flach CF, Larsson DGJ. Evidence for selection of multi-resistant E. coli by hospital effluent. Environ Int 2021; 150:106436. [PMID: 33592450 DOI: 10.1016/j.envint.2021.106436] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/28/2021] [Accepted: 01/29/2021] [Indexed: 06/12/2023]
Abstract
There is a risk that residues of antibiotics and other antimicrobials in hospital and municipal wastewaters could select for resistant bacteria. Still, direct experimental evidence for selection is lacking. Here, we investigated if effluent from a large Swedish hospital, as well as influent and effluent from the connected municipal wastewater treatment plant (WWTP) select for antibiotic resistant Escherichia coli in three controlled experimental setups. Exposure of sterile-filtered hospital effluent to a planktonic mix of 149 different E. coli wastewater isolates showed a strong selection of multi-resistant strains. Accordingly, exposure to a complex wastewater community selected for strains resistant to several antibiotic classes. Exposing individual strains with variable resistance patterns revealed a rapid bactericidal effect of hospital effluent on susceptible, but not multi-resistant E. coli. No selection was observed after exposure to WWTP effluent, while exposure to WWTP influent indicated a small selective effect for ceftazidime and cefadroxil resistant strains, and only in the E. coli mix assay. An analysis of commonly used antibiotics and non-antibiotic pharmaceuticals in combination with growth and resistance pattern of individual E. coli isolates suggested a possible contribution of ciprofloxacin and β-lactams to the selection by hospital effluent. However, more research is needed to clarify the contribution from different selective agents. While this study does not indicate selection by the studied WWTP effluent, there is some indications of selective effects by municipal influent on β-lactam-resistant strains. Such effects may be more pronounced in countries with higher antibiotic use than Sweden. Despite the limited antibiotic use in Sweden, the hospital effluent strongly and consistently selected for multi-resistance, indicating widespread risks. Hence, there is an urgent need for further evaluation of risks for resistance selection in hospital sewers, as well as for strategies to remove selective agents and resistant bacteria.
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Affiliation(s)
- Nadine Kraupner
- Centre for Antibiotic Resistance Research (CARe) at the University of Gothenburg, Gothenburg, Sweden; Department of Infectious Diseases, Institute of Biomedicine, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Marion Hutinel
- Centre for Antibiotic Resistance Research (CARe) at the University of Gothenburg, Gothenburg, Sweden; Department of Infectious Diseases, Institute of Biomedicine, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Kilian Schumacher
- Centre for Antibiotic Resistance Research (CARe) at the University of Gothenburg, Gothenburg, Sweden; Department of Infectious Diseases, Institute of Biomedicine, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden; Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany(1)
| | - Declan A Gray
- Centre for Antibiotic Resistance Research (CARe) at the University of Gothenburg, Gothenburg, Sweden; Department of Infectious Diseases, Institute of Biomedicine, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Maja Genheden
- Centre for Antibiotic Resistance Research (CARe) at the University of Gothenburg, Gothenburg, Sweden; Department of Infectious Diseases, Institute of Biomedicine, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Jerker Fick
- Department of Chemistry, Umea University, Sweden
| | - Carl-Fredrik Flach
- Centre for Antibiotic Resistance Research (CARe) at the University of Gothenburg, Gothenburg, Sweden; Department of Infectious Diseases, Institute of Biomedicine, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - D G Joakim Larsson
- Centre for Antibiotic Resistance Research (CARe) at the University of Gothenburg, Gothenburg, Sweden; Department of Infectious Diseases, Institute of Biomedicine, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.
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Monjas L, Fodran P, Kollback J, Cassani C, Olsson T, Genheden M, Larsson DGJ, Wallentin CJ. Synthesis and biological evaluation of truncated derivatives of abyssomicin C as antibacterial agents. Beilstein J Org Chem 2019; 15:1468-1474. [PMID: 31354863 PMCID: PMC6633193 DOI: 10.3762/bjoc.15.147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 06/18/2019] [Indexed: 12/02/2022] Open
Abstract
The synthesis and antibacterial activity of two new highly truncated derivatives of the natural product abyssomicin C are reported. This work outlines the limits of structural truncation of the natural product and consequently provides insights for further structure–activity relationship studies towards novel antibiotics targeting 4-amino-4-deoxychorismate (ADC) synthase. Specifically, it is demonstrated that the synthetically challenging bicyclic motif is essential for activity towards methicillin-resistant Staphylococcus aureus (MRSA).
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Affiliation(s)
- Leticia Monjas
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemigården 4, 412 96, Gothenburg, Sweden.,Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
| | - Peter Fodran
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemigården 4, 412 96, Gothenburg, Sweden.,Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
| | - Johanna Kollback
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemigården 4, 412 96, Gothenburg, Sweden
| | - Carlo Cassani
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemigården 4, 412 96, Gothenburg, Sweden.,Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden.,current affiliation: Hit Discovery, Discovery Sciences, R&D BioPharmaceuticals, AstraZeneca, Gothenburg, Sweden
| | - Thomas Olsson
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemigården 4, 412 96, Gothenburg, Sweden
| | - Maja Genheden
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden.,Department of Infectious Diseases, Institute of Biomedicine, The Sahlgrenska Academy at the University of Gothenburg, Guldhedsgatan 10, 413 46, Gothenburg, Sweden
| | - D G Joakim Larsson
- Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden.,Department of Infectious Diseases, Institute of Biomedicine, The Sahlgrenska Academy at the University of Gothenburg, Guldhedsgatan 10, 413 46, Gothenburg, Sweden
| | - Carl-Johan Wallentin
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemigården 4, 412 96, Gothenburg, Sweden.,Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
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Flach CF, Genheden M, Fick J, Joakim Larsson DG. A Comprehensive Screening of Escherichia coli Isolates from Scandinavia's Largest Sewage Treatment Plant Indicates No Selection for Antibiotic Resistance. Environ Sci Technol 2018; 52:11419-11428. [PMID: 30215260 DOI: 10.1021/acs.est.8b03354] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
There is concern that sewage treatment plants (STPs) serve as hotspots for emergence and selection of antibiotic resistant bacteria. However, field studies investigating resistance selection by comparing bacterial populations in influents and effluents have produced variable and sometimes contradictive results. Also, large taxonomic changes between influents and effluents make interpretation of studies measuring relative gene abundances ambiguous. The aim here was to investigate whether within-species selection occurs by conducting a comprehensive screening of Escherichia coli isolated from composite influent and effluent samples collected at Scandinavia's largest STP, accompanied by analyses of antibiotics residues. In total, 4028 isolates, collected on eight occasions during 18 months, were screened for resistance to seven antibiotics. Although differences in proportions of resistant E. coli between influent and effluent samples were detected for a few antibiotics on two occasions, aggregated data over time showed no such differences for any of the investigated antibiotics. Neither was there any enrichment of multiresistant or extended-spectrum beta-lactamase-producing isolates through the treatment process. Despite some antibiotics were detected at or close to concentrations predicted to provide some selective pressure, field observations of resistance profiles in E. coli do not provide support for systematic selection in the investigated STP.
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Affiliation(s)
- Carl-Fredrik Flach
- Centre for Antibiotic Resistance Research (CARe) , University of Gothenburg , 41346 Gothenburg , Sweden
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy , University of Gothenburg , 41346 Gothenburg , Sweden
| | - Maja Genheden
- Centre for Antibiotic Resistance Research (CARe) , University of Gothenburg , 41346 Gothenburg , Sweden
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy , University of Gothenburg , 41346 Gothenburg , Sweden
| | - Jerker Fick
- Department of Chemistry , Umeå University , 90187 Umeå , Sweden
| | - D G Joakim Larsson
- Centre for Antibiotic Resistance Research (CARe) , University of Gothenburg , 41346 Gothenburg , Sweden
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy , University of Gothenburg , 41346 Gothenburg , Sweden
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Kenney JW, Genheden M, Moon KM, Wang X, Foster LJ, Proud CG. Eukaryotic elongation factor 2 kinase regulates the synthesis of microtubule-related proteins in neurons. J Neurochem 2015; 136:276-84. [PMID: 26485687 PMCID: PMC4843953 DOI: 10.1111/jnc.13407] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [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: 05/31/2015] [Revised: 09/10/2015] [Accepted: 10/14/2015] [Indexed: 12/11/2022]
Abstract
Modulation of the elongation phase of protein synthesis is important for numerous physiological processes in both neurons and other cell types. Elongation is primarily regulated via eukaryotic elongation factor 2 kinase (eEF2K). However, the consequence of altering eEF2K activity on the synthesis of specific proteins is largely unknown. Using both pharmacological and genetic manipulations of eEF2K combined with two protein‐labeling techniques, stable isotope labeling of amino acids in cell culture and bio‐orthogonal non‐canonical amino acid tagging, we identified a subset of proteins whose synthesis is sensitive to inhibition of eEF2K in murine primary cortical neurons. Gene ontology (GO) analyses indicated that processes related to microtubules are particularly sensitive to eEF2K inhibition. Our findings suggest that eEF2K likely contributes to neuronal function by regulating the synthesis of microtubule‐related proteins.
Modulation of the elongation phase of protein synthesis is important for numerous physiological processes in neurons. Here, using labeling of new proteins coupled with proteomic techniques in primary cortical neurons, we find that the synthesis of microtubule‐related proteins is up‐regulated by inhibition of elongation. This suggests that translation elongation is a key regulator of cytoskeletal dynamics in neurons.
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Affiliation(s)
- Justin W Kenney
- Centre for Biological Sciences, University of Southampton, Southampton, UK
| | - Maja Genheden
- Centre for Biological Sciences, University of Southampton, Southampton, UK
| | - Kyung-Mee Moon
- Centre for High-throughput Biology and Department of Biochemistry & Molecular Biology, University of British Columbia, Vancouver, BC, Canada
| | - Xuemin Wang
- Centre for Biological Sciences, University of Southampton, Southampton, UK
| | - Leonard J Foster
- Centre for High-throughput Biology and Department of Biochemistry & Molecular Biology, University of British Columbia, Vancouver, BC, Canada
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