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Henly EL, Norris K, Rawson K, Zoulias N, Jaques L, Chirila PG, Parkin KL, Kadirvel M, Whiteoak C, Lacey MM, Smith TJ, Forbes S. Impact of long-term quorum sensing inhibition on uropathogenic Escherichia coli. J Antimicrob Chemother 2021; 76:909-919. [PMID: 33406232 DOI: 10.1093/jac/dkaa517] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 11/16/2020] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Quorum sensing is an extracellular bacterial communication system used in the density-dependent regulation of gene expression and development of biofilms. Biofilm formation has been implicated in the establishment of catheter-associated urinary tract infections and therefore quorum sensing inhibitors (QSIs) have been suggested as anti-biofilm catheter coating agents. The long-term effects of QSIs in uropathogens is, however, not clearly understood. OBJECTIVES We evaluated the effects of repeated exposure to the QSIs cinnamaldehyde, (Z)-4-bromo-5(bromomethylene)-2(5H)-furanone-C30 (furanone-C30) and 4-fluoro-5-hydroxypentane-2,3-dione (F-DPD) on antimicrobial susceptibility, biofilm formation and relative pathogenicity in eight uropathogenic Escherichia coli (UPEC) isolates. METHODS MICs, MBCs and minimum biofilm eradication concentrations and antibiotic susceptibility were determined. Biofilm formation was quantified using crystal violet. Relative pathogenicity was assessed in a Galleria mellonella model. To correlate changes in phenotype to gene expression, transcriptomic profiles were created through RNA sequencing and variant analysis of genomes was performed in strain EC958. RESULTS Cinnamaldehyde and furanone-C30 led to increases in susceptibility in planktonic and biofilm-associated UPEC. Relative pathogenicity increased after cinnamaldehyde exposure (4/8 isolates), decreased after furanone-C30 exposure (6/8 isolates) and varied after F-DPD exposure (one increased and one decreased). A total of 9/96 cases of putative antibiotic cross-resistance were generated. Exposure to cinnamaldehyde or F-DPD reduced expression of genes associated with locomotion, whilst cinnamaldehyde caused an increase in genes encoding fimbrial and afimbrial-like adhesins. Furanone-C30 caused a reduction in genes involved in cellular biosynthetic processes, likely though impaired ribonucleoprotein assembly. CONCLUSIONS The multiple phenotypic adaptations induced during QSI exposure in UPEC should be considered when selecting an anti-infective catheter coating agent.
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Affiliation(s)
- E L Henly
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
| | - K Norris
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
| | - K Rawson
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
| | - N Zoulias
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, UK
| | - L Jaques
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
| | - P G Chirila
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
| | - K L Parkin
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
| | - M Kadirvel
- Manchester Pharmacy School, University of Manchester, Manchester, UK
| | - C Whiteoak
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
| | - M M Lacey
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
| | - T J Smith
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
| | - S Forbes
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, UK
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Morris O, Gregory J, Kadirvel M, Henderson F, Blykers A, McMahon A, Taylor M, Allsop D, Allan S, Grigg J, Boutin H, Prenant C. Development & automation of a novel [(18)F]F prosthetic group, 2-[(18)F]-fluoro-3-pyridinecarboxaldehyde, and its application to an amino(oxy)-functionalised Aβ peptide. Appl Radiat Isot 2016; 116:120-7. [PMID: 27518217 PMCID: PMC5034901 DOI: 10.1016/j.apradiso.2016.07.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 07/07/2016] [Accepted: 07/26/2016] [Indexed: 12/15/2022]
Abstract
2-[(18)F]-Fluoro-3-pyridinecarboxaldehyde ([(18)F]FPCA) is a novel, water-soluble prosthetic group. It's radiochemistry has been developed and fully-automated for application in chemoselective radiolabelling of amino(oxy)-derivatised RI-OR2-TAT peptide, (Aoa-k)-RI-OR2-TAT, using a GE TRACERlab FX-FN. RI-OR2-TAT is a brain-penetrant, retro-inverso peptide that binds to amyloid species associated with Alzheimer's Disease. Radiolabelled (Aoa-k)-RI-OR2-TAT was reproducibly synthesised and the product of the reaction with FPCA has been fully characterised. In-vivo biodistribution of [(18)F]RI-OR2-TAT has been measured in Wistar rats.
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Affiliation(s)
- Olivia Morris
- Wolfson Molecular Imaging Centre, CRUK/EPSRC Imaging Centre of Cambridge & Manchester, The University of Manchester, UK.
| | - J Gregory
- Wolfson Molecular Imaging Centre, CRUK/EPSRC Imaging Centre of Cambridge & Manchester, The University of Manchester, UK
| | - M Kadirvel
- Wolfson Molecular Imaging Centre, CRUK/EPSRC Imaging Centre of Cambridge & Manchester, The University of Manchester, UK
| | - Fiona Henderson
- Wolfson Molecular Imaging Centre, CRUK/EPSRC Imaging Centre of Cambridge & Manchester, The University of Manchester, UK
| | - A Blykers
- In-Vivo Cellular and Molecular Imaging Lab, Vrije Universiteit Brussel, Belgium
| | - Adam McMahon
- Wolfson Molecular Imaging Centre, CRUK/EPSRC Imaging Centre of Cambridge & Manchester, The University of Manchester, UK
| | - Mark Taylor
- Division of Biomedical and Life Sciences, The University of Lancaster, UK
| | - David Allsop
- Division of Biomedical and Life Sciences, The University of Lancaster, UK
| | | | - J Grigg
- GE Healthcare, Life Sciences, Imaging R&D, The Grove Centre, Amersham, Bucks, UK
| | - Herve Boutin
- Wolfson Molecular Imaging Centre, CRUK/EPSRC Imaging Centre of Cambridge & Manchester, The University of Manchester, UK
| | - Christian Prenant
- Wolfson Molecular Imaging Centre, CRUK/EPSRC Imaging Centre of Cambridge & Manchester, The University of Manchester, UK
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Simpson KL, Cawthorne C, Zhou C, Hodgkinson CL, Walker MJ, Trapani F, Kadirvel M, Brown G, Dawson MJ, MacFarlane M, Williams KJ, Whetton AD, Dive C. A caspase-3 'death-switch' in colorectal cancer cells for induced and synchronous tumor apoptosis in vitro and in vivo facilitates the development of minimally invasive cell death biomarkers. Cell Death Dis 2013; 4:e613. [PMID: 23640455 PMCID: PMC3674346 DOI: 10.1038/cddis.2013.137] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [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: 11/06/2012] [Revised: 02/22/2013] [Accepted: 02/25/2013] [Indexed: 12/19/2022]
Abstract
Novel anticancer drugs targeting key apoptosis regulators have been developed and are undergoing clinical trials. Pharmacodynamic biomarkers to define the optimum dose of drug that provokes tumor apoptosis are in demand; acquisition of longitudinal tumor biopsies is a significant challenge and minimally invasive biomarkers are required. Considering this, we have developed and validated a preclinical 'death-switch' model for the discovery of secreted biomarkers of tumour apoptosis using in vitro proteomics and in vivo evaluation of the novel imaging probe [(18)F]ML-10 for non-invasive detection of apoptosis using positron emission tomography (PET). The 'death-switch' is a constitutively active mutant caspase-3 that is robustly induced by doxycycline to drive synchronous apoptosis in human colorectal cancer cells in vitro or grown as tumor xenografts. Death-switch induction caused caspase-dependent apoptosis between 3 and 24 hours in vitro and regression of 'death-switched' xenografts occurred within 24 h correlating with the percentage of apoptotic cells in tumor and levels of an established cell death biomarker (cleaved cytokeratin-18) in the blood. We sought to define secreted biomarkers of tumor apoptosis from cultured cells using Discovery Isobaric Tag proteomics, which may provide candidates to validate in blood. Early after caspase-3 activation, levels of normally secreted proteins were decreased (e.g. Gelsolin and Midkine) and proteins including CD44 and High Mobility Group protein B1 (HMGB1) that were released into cell culture media in vitro were also identified in the bloodstream of mice bearing death-switched tumors. We also exemplify the utility of the death-switch model for the validation of apoptotic imaging probes using [(18)F]ML-10, a PET tracer currently in clinical trials. Results showed increased tracer uptake of [(18)F]ML-10 in tumours undergoing apoptosis, compared with matched tumour controls imaged in the same animal. Overall, the death-switch model represents a robust and versatile tool for the discovery and validation of apoptosis biomarkers.
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Affiliation(s)
- K L Simpson
- Clinical and Experimental Pharmacology Group, Paterson Institute for Cancer Research, University of Manchester and Manchester Cancer Research Centre, Wilmslow Road, Withington, Manchester, UK
| | - C Cawthorne
- Wolfson Molecular Imaging Centre, University of Manchester, 27 Palatine Road, Manchester, UK
| | - C Zhou
- Clinical and Experimental Pharmacology Group, Paterson Institute for Cancer Research, University of Manchester and Manchester Cancer Research Centre, Wilmslow Road, Withington, Manchester, UK
| | - C L Hodgkinson
- Clinical and Experimental Pharmacology Group, Paterson Institute for Cancer Research, University of Manchester and Manchester Cancer Research Centre, Wilmslow Road, Withington, Manchester, UK
| | - M J Walker
- Clinical and Experimental Pharmacology Group, Paterson Institute for Cancer Research, University of Manchester and Manchester Cancer Research Centre, Wilmslow Road, Withington, Manchester, UK
- Stem Cell and Leukaemia Proteomics Laboratory, School of Cancer and Enabling Sciences, University of Manchester, Manchester Academic Health Science Centre, Christie Hospital, Manchester, UK
| | - F Trapani
- Clinical and Experimental Pharmacology Group, Paterson Institute for Cancer Research, University of Manchester and Manchester Cancer Research Centre, Wilmslow Road, Withington, Manchester, UK
| | - M Kadirvel
- Wolfson Molecular Imaging Centre, University of Manchester, 27 Palatine Road, Manchester, UK
| | - G Brown
- Wolfson Molecular Imaging Centre, University of Manchester, 27 Palatine Road, Manchester, UK
| | - M J Dawson
- Clinical and Experimental Pharmacology Group, Paterson Institute for Cancer Research, University of Manchester and Manchester Cancer Research Centre, Wilmslow Road, Withington, Manchester, UK
| | - M MacFarlane
- MRC Toxicology Unit, Hodgkin Building, University of Leicester, Lancaster Road, Leicester, UK
| | - K J Williams
- Wolfson Molecular Imaging Centre, University of Manchester, 27 Palatine Road, Manchester, UK
| | - A D Whetton
- Stem Cell and Leukaemia Proteomics Laboratory, School of Cancer and Enabling Sciences, University of Manchester, Manchester Academic Health Science Centre, Christie Hospital, Manchester, UK
| | - C Dive
- Clinical and Experimental Pharmacology Group, Paterson Institute for Cancer Research, University of Manchester and Manchester Cancer Research Centre, Wilmslow Road, Withington, Manchester, UK
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