1
|
Basu A, Samhita L. Context-dependent fitness benefits of antibiotic resistance mutations. Proc Biol Sci 2024; 291:20241071. [PMID: 39043246 PMCID: PMC11265866 DOI: 10.1098/rspb.2024.1071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/15/2024] [Accepted: 06/24/2024] [Indexed: 07/25/2024] Open
Affiliation(s)
- Aabeer Basu
- Ashoka University, Rajiv Gandhi Education City, Sonipat 131029, Haryana, India
| | - Laasya Samhita
- Ashoka University, Rajiv Gandhi Education City, Sonipat 131029, Haryana, India
| |
Collapse
|
2
|
James B, Reesaul H, Kashif S, Behruznia M, Meehan CJ, Domingo-Sananes MR, Hubbard ATM. The effect of antibiotic selection on collateral effects and evolvability of uropathogenic Escherichia coli. NPJ ANTIMICROBIALS AND RESISTANCE 2024; 2:19. [PMID: 39036800 PMCID: PMC11254750 DOI: 10.1038/s44259-024-00037-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 06/28/2024] [Indexed: 07/23/2024]
Abstract
Trimethoprim is recommended as a first-line treatment of urinary tract infections (UTIs) in the UK. In 2018, 31.4% of Escherichia coli isolated from UTIs in England were trimethoprim-resistant, leading to overreliance on other first and second-line antibiotics. Here, we assessed whether, in principle, prior selection with trimethoprim results in collateral effects to other antibiotics recommended for the treatment of UTIs. As collateral effects, we considered changes in susceptibility, mutation-selection window and population establishment probability. We selected 10 trimethoprim-resistant derivatives from three clinical isolates of uropathogenic Escherichia coli. We found that mutations conferring trimethoprim resistance did not have any collateral effects on fosfomycin. In contrast, resistance to trimethoprim resulted in decreased susceptibility (collateral resistance) to nitrofurantoin, below the clinical breakpoint and narrowed the mutation-selection window, thereby reducing the maximum concentration for selection of nitrofurantoin resistance mutations. Our analyses demonstrate that multiple collateral responses should be accounted for when predicting and optimising antibiotic use, limiting future antimicrobial resistance emergence.
Collapse
Affiliation(s)
- Beth James
- Department of Biosciences, Nottingham Trent University, Clifton Campus, College Drive, Clifton, Nottingham NG11 8NS UK
| | - Hishikha Reesaul
- Department of Biosciences, Nottingham Trent University, Clifton Campus, College Drive, Clifton, Nottingham NG11 8NS UK
| | - Sidra Kashif
- Department of Biosciences, Nottingham Trent University, Clifton Campus, College Drive, Clifton, Nottingham NG11 8NS UK
| | - Mahboobeh Behruznia
- Department of Biosciences, Nottingham Trent University, Clifton Campus, College Drive, Clifton, Nottingham NG11 8NS UK
| | - Conor J. Meehan
- Department of Biosciences, Nottingham Trent University, Clifton Campus, College Drive, Clifton, Nottingham NG11 8NS UK
| | - Maria Rosa Domingo-Sananes
- Department of Biosciences, Nottingham Trent University, Clifton Campus, College Drive, Clifton, Nottingham NG11 8NS UK
| | - Alasdair T. M. Hubbard
- Department of Biosciences, Nottingham Trent University, Clifton Campus, College Drive, Clifton, Nottingham NG11 8NS UK
| |
Collapse
|
3
|
Nguyen TT, Bui LM, Byun JY, Cho BK, Kim SC. Exploring the Potential of a Genome-Reduced Escherichia coli Strain for Plasmid DNA Production. Int J Mol Sci 2023; 24:11749. [PMID: 37511505 PMCID: PMC10380479 DOI: 10.3390/ijms241411749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/15/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023] Open
Abstract
The global demand for nucleic acid-based vaccines, including plasmid DNA (pDNA) and mRNA vaccines, needs efficient production platforms. However, conventional hosts for plasmid production have encountered challenges related to sequence integrity due to the presence of insertion sequences (ISs). In this study, we explored the potential of a genome-reduced Escherichia coli as a host for pDNA production. This strain had been constructed by removing approximately 23% of the genome which were unessential genes, including the genomic unstable elements. Moreover, the strain exhibits an elevated level of NADPH, a coenzyme known to increase plasmid production according to a mathematical model. We hypothesized that the combination of genome reduction and the abundance of NADPH would significantly enhance pDNA production capabilities. Remarkably, our results confirmed a three-fold increase in pDNA production compared to the widely employed DH5α strain. Furthermore, the genome-reduced strain exhibited heightened sensitivity to various antibiotics, bolstering its potential for large scale industrial pDNA production. These findings suggest the genome-reduced E. coli as an exciting candidate for revolutionizing the pDNA industry, offering unprecedented efficiency and productivity.
Collapse
Affiliation(s)
- Thi Thuy Nguyen
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Le Minh Bui
- Department of Biotechnology, NTT Hi-Tech Institute, Nguyen Tat Thanh University (NTTU), Ho Chi Minh City 700000, Vietnam
| | - Ji-Young Byun
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Byung-Kwan Cho
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- KI for BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Sun Chang Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- KI for BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| |
Collapse
|
4
|
Jafari NV, Rohn JL. An immunoresponsive three-dimensional urine-tolerant human urothelial model to study urinary tract infection. Front Cell Infect Microbiol 2023; 13:1128132. [PMID: 37051302 PMCID: PMC10083561 DOI: 10.3389/fcimb.2023.1128132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 03/01/2023] [Indexed: 03/29/2023] Open
Abstract
IntroductionMurine models of urinary tract infection (UTI) have improved our understanding of host-pathogen interactions. However, given differences between rodent and human bladders which may modulate host and bacterial response, including certain biomarkers, urothelial thickness and the concentration of urine, the development of new human-based models is important to complement mouse studies and to provide a more complete picture of UTI in patients.MethodsWe originally developed a human urothelial three-dimensional (3D) model which was urine tolerant and demonstrated several urothelial biomarkers, but it only achieved human thickness in heterogenous, multi-layered zones and did not demonstrate the comprehensive differentiation status needed to achieve barrier function. We optimised this model by altering a variety of conditions and validated it with microscopy, flow cytometry, transepithelial electrical resistance and FITC-dextran permeability assays to confirm tissue architecture, barrier integrity and response to bacterial infection.ResultsWe achieved an improved 3D urine-tolerant human urothelial model (3D-UHU), which after 18-20 days of growth, stratified uniformly to 7-8 layers comprised of the three expected, distinct human cell types. The apical surface differentiated into large, CD227+ umbrella-like cells expressing uroplakin-1A, II, III, and cytokeratin 20, all of which are important terminal differentiation markers, and a glycosaminoglycan layer. Below this layer, several layers of intermediate cells were present, with a single underlying layer of CD271+ basal cells. The apical surface also expressed E-cadherin, ZO-1, claudin-1 and -3, and the model possessed good barrier function. Infection with both Gram-negative and Gram-positive bacterial classes elicited elevated levels of pro-inflammatory cytokines and chemokines characteristic of urinary tract infection in humans and caused a decrease in barrier function.DiscussionTaken together, 3D-UHU holds promise for studying host-pathogen interactions and host urothelial immune response.
Collapse
|
5
|
Li Y, Peng Y, Zhang N, Liu H, Mao J, Yan Y, Wang S, Yang G, Liu Y, Li J, Huang X. Assessing the Emergence of Resistance in vitro and Invivo: Linezolid Combined with Fosfomycin Against Fosfomycin-Sensitive and Resistant Enterococcus. Infect Drug Resist 2022; 15:4995-5010. [PMID: 36065277 PMCID: PMC9440711 DOI: 10.2147/idr.s377848] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 08/20/2022] [Indexed: 11/23/2022] Open
Affiliation(s)
- Yaowen Li
- Department of Basic and Clinical Pharmacology, School of Pharmacy, Anhui Medical University, Hefei, People’s Republic of China
- Anhui Province Key Laboratory of Major Autoimmune Diseases, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, People’s Republic of China
| | - Yu Peng
- Department of Basic and Clinical Pharmacology, School of Pharmacy, Anhui Medical University, Hefei, People’s Republic of China
- Anhui Province Key Laboratory of Major Autoimmune Diseases, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, People’s Republic of China
| | - Na Zhang
- Department of Basic and Clinical Pharmacology, School of Pharmacy, Anhui Medical University, Hefei, People’s Republic of China
- Anhui Province Key Laboratory of Major Autoimmune Diseases, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, People’s Republic of China
| | - Huiping Liu
- Department of Basic and Clinical Pharmacology, School of Pharmacy, Anhui Medical University, Hefei, People’s Republic of China
- Anhui Province Key Laboratory of Major Autoimmune Diseases, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, People’s Republic of China
| | - Jun Mao
- Department of Basic and Clinical Pharmacology, School of Pharmacy, Anhui Medical University, Hefei, People’s Republic of China
- Anhui Province Key Laboratory of Major Autoimmune Diseases, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, People’s Republic of China
| | - Yisong Yan
- Department of Pharmacy, Anhui College of Traditional Chinese Medicine, Wuhu, Anhui, People’s Republic of China
| | - Shuaishuai Wang
- Department of Basic and Clinical Pharmacology, School of Pharmacy, Anhui Medical University, Hefei, People’s Republic of China
- Anhui Province Key Laboratory of Major Autoimmune Diseases, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, People’s Republic of China
| | - Guang Yang
- Department of Pharmacy, The Third People’s Hospital of Tongling, Tongling, Anhui, People’s Republic of China
| | - Yanyan Liu
- Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, People’s Republic of China
| | - Jiabin Li
- Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, People’s Republic of China
| | - Xiaohui Huang
- Department of Basic and Clinical Pharmacology, School of Pharmacy, Anhui Medical University, Hefei, People’s Republic of China
- Anhui Province Key Laboratory of Major Autoimmune Diseases, School of Pharmacy, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, People’s Republic of China
- Correspondence: Xiaohui Huang, Department of Basic and Clinical Pharmacology, School of Pharmacy, Anhui Medical University, Meishan Road 81#, Hefei, Anhui, 230032, People’s Republic of China, Tel +86 138 5518 3138, Email
| |
Collapse
|
6
|
Jafari NV, Rohn JL. The urothelium: a multi-faceted barrier against a harsh environment. Mucosal Immunol 2022; 15:1127-1142. [PMID: 36180582 PMCID: PMC9705259 DOI: 10.1038/s41385-022-00565-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/18/2022] [Accepted: 08/28/2022] [Indexed: 02/04/2023]
Abstract
All mucosal surfaces must deal with the challenge of exposure to the outside world. The urothelium is a highly specialized layer of stratified epithelial cells lining the inner surface of the urinary bladder, a gruelling environment involving significant stretch forces, osmotic and hydrostatic pressures, toxic substances, and microbial invasion. The urinary bladder plays an important barrier role and allows the accommodation and expulsion of large volumes of urine without permitting urine components to diffuse across. The urothelium is made up of three cell types, basal, intermediate, and umbrella cells, whose specialized functions aid in the bladder's mission. In this review, we summarize the recent insights into urothelial structure, function, development, regeneration, and in particular the role of umbrella cells in barrier formation and maintenance. We briefly review diseases which involve the bladder and discuss current human urothelial in vitro models as a complement to traditional animal studies.
Collapse
Affiliation(s)
- Nazila V Jafari
- Department of Renal Medicine, Division of Medicine, University College London, Royal Free Hospital Campus, London, UK
| | - Jennifer L Rohn
- Department of Renal Medicine, Division of Medicine, University College London, Royal Free Hospital Campus, London, UK.
| |
Collapse
|
7
|
Kloos J, Gama JA, Hegstad J, Samuelsen Ø, Johnsen PJ. Piggybacking on Niche Adaptation Improves the Maintenance of Multidrug-Resistance Plasmids. Mol Biol Evol 2021; 38:3188-3201. [PMID: 33760032 PMCID: PMC8321521 DOI: 10.1093/molbev/msab091] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 02/12/2021] [Accepted: 03/23/2021] [Indexed: 12/27/2022] Open
Abstract
The persistence of plasmids in bacterial populations represents a puzzling evolutionary problem with serious clinical implications due to their role in the ongoing antibiotic resistance crisis. Recently, major advancements have been made toward resolving this “plasmid paradox” but mainly in a nonclinical context. Here, we propose an additional explanation for the maintenance of multidrug‐resistance plasmids in clinical Escherichia coli strains. After coevolving two multidrug‐resistance plasmids encoding resistance to last resort carbapenems with an extraintestinal pathogenic E. coli strain, we observed that chromosomal media adaptive mutations in the global regulatory systems CCR (carbon catabolite repression) and ArcAB (aerobic respiration control) pleiotropically improved the maintenance of both plasmids. Mechanistically, a net downregulation of plasmid gene expression reduced the fitness cost. Our results suggest that global chromosomal transcriptional rewiring during bacterial niche adaptation may facilitate plasmid maintenance.
Collapse
Affiliation(s)
- Julia Kloos
- Department of Pharmacy, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
| | - João A Gama
- Department of Pharmacy, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
| | - Joachim Hegstad
- Department of Pharmacy, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway.,Department of Microbiology and Infection Control, University Hospital of North Norway, Tromsø, Norway
| | - Ørjan Samuelsen
- Department of Pharmacy, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway.,Norwegian National Advisory Unit on Detection of Antimicrobial Resistance, Department of Microbiology and Infection Control, University Hospital of North Norway, Tromsø, Norway
| | - Pål J Johnsen
- Department of Pharmacy, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
| |
Collapse
|
8
|
Weng ML, Ågren J, Imbert E, Nottebrock H, Rutter MT, Fenster CB. Fitness effects of mutation in natural populations of Arabidopsis thaliana reveal a complex influence of local adaptation. Evolution 2020; 75:330-348. [PMID: 33340094 DOI: 10.1111/evo.14152] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 08/21/2020] [Accepted: 09/13/2020] [Indexed: 12/22/2022]
Abstract
Little is empirically known about the contribution of mutations to fitness in natural environments. However, Fisher's Geometric Model (FGM) provides a conceptual foundation to consider the influence of the environment on mutational effects. To quantify mutational properties in the field, we established eight sets of MA lines (7-10 generations) derived from eight founders collected from natural populations of Arabidopsis thaliana from French and Swedish sites, representing the range margins of the species in Europe. We reciprocally planted the MA lines and their founders at French and Swedish sites, allowing us to test predictions of FGM under naturally occurring environmental conditions. The performance of the MA lines relative to each other and to their respective founders confirmed some and contradicted other predictions of the FGM: the contribution of mutation to fitness variance increased when the genotype was in an environment where its fitness was low, that is, in the away environment, but mutations were more likely to be beneficial when the genotype was in its home environment. Consequently, environmental context plays a large role in the contribution of mutations to the evolutionary process and local adaptation does not guarantee that a genotype is at or close to its optimum.
Collapse
Affiliation(s)
- Mao-Lun Weng
- Department of Biology and Microbiology, South Dakota State University, Brookings, South Dakota, USA.,Current address: Department of Biology, Westfield State University, Westfield, Massachusettes, USA
| | - Jon Ågren
- Plant Ecology and Evolution, Department of Ecology and Genetics, EBC, Uppsala University, Uppsala, Sweden
| | - Eric Imbert
- Institut des Sciences de la Évolution, Centre National de la Recherche Scientifique, University of Montpellier, Montpellier, France
| | - Henning Nottebrock
- Department of Biology and Microbiology, South Dakota State University, Brookings, South Dakota, USA.,Current address: Plant Ecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Universitätsstrasse 30, Bayreuth, Germany
| | - Matthew T Rutter
- Department of Biology, College of Charleston, South Carolina, USA
| | - Charles B Fenster
- Department of Biology and Microbiology, South Dakota State University, Brookings, South Dakota, USA.,Oak Lake Field Station, South Dakota State University, Brookings, South Dakota, USA
| |
Collapse
|
9
|
Hubbard ATM, Mason J, Roberts P, Parry CM, Corless C, van Aartsen J, Howard A, Bulgasim I, Fraser AJ, Adams ER, Roberts AP, Edwards T. Piperacillin/tazobactam resistance in a clinical isolate of Escherichia coli due to IS26-mediated amplification of bla TEM-1B. Nat Commun 2020; 11:4915. [PMID: 33004811 PMCID: PMC7530762 DOI: 10.1038/s41467-020-18668-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 09/03/2020] [Indexed: 12/12/2022] Open
Abstract
A phenotype of Escherichia coli and Klebsiella pneumoniae, resistant to piperacillin/tazobactam (TZP) but susceptible to carbapenems and 3rd generation cephalosporins, has emerged. The resistance mechanism associated with this phenotype has been identified as hyperproduction of the β-lactamase TEM. However, the mechanism of hyperproduction due to gene amplification is not well understood. Here, we report a mechanism of gene amplification due to a translocatable unit (TU) excising from an IS26-flanked pseudo-compound transposon, PTn6762, which harbours blaTEM-1B. The TU re-inserts into the chromosome adjacent to IS26 and forms a tandem array of TUs, which increases the copy number of blaTEM-1B, leading to TEM-1B hyperproduction and TZP resistance. Despite a significant increase in blaTEM-1B copy number, the TZP-resistant isolate does not incur a fitness cost compared to the TZP-susceptible ancestor. This mechanism of amplification of blaTEM-1B is an important consideration when using genomic data to predict susceptibility to TZP.
Collapse
MESH Headings
- Anti-Bacterial Agents/pharmacology
- Anti-Bacterial Agents/therapeutic use
- Chromosomes, Bacterial/genetics
- DNA Transposable Elements/genetics
- DNA, Bacterial/genetics
- Drug Resistance, Multiple, Bacterial/genetics
- Drug Therapy, Combination/methods
- Escherichia coli/drug effects
- Escherichia coli/genetics
- Escherichia coli/isolation & purification
- Escherichia coli Infections/drug therapy
- Escherichia coli Infections/microbiology
- Escherichia coli Proteins/genetics
- Gene Amplification
- Gene Expression Regulation, Bacterial
- Genome, Bacterial/genetics
- Humans
- Microbial Sensitivity Tests
- Piperacillin/pharmacology
- Piperacillin/therapeutic use
- Polymorphism, Restriction Fragment Length
- RNA, Ribosomal, 16S/genetics
- Tazobactam/pharmacology
- Tazobactam/therapeutic use
- Whole Genome Sequencing
- beta-Lactamases/genetics
Collapse
Affiliation(s)
- Alasdair T M Hubbard
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK.
| | - Jenifer Mason
- Liverpool University Hospital Foundation Trust, Prescot Street, Liverpool, L7 8XP, UK
| | - Paul Roberts
- Liverpool University Hospital Foundation Trust, Prescot Street, Liverpool, L7 8XP, UK
- Faculty of Science and Engineering, University of Wolverhampton, Wulfruna Building MA, Wulfruna Street, Wolverhampton, WV1 1LY, UK
| | - Christopher M Parry
- Alder Hey Children's NHS Foundation Trust, Eaton Road, Liverpool, L12 2AP, UK
- Department of Clinical Infection, Microbiology and Immunology, University of Liverpool, Liverpool, L69 7BE, UK
- Clinical Sciences, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
- School of Tropical Medicine and Global Health, University of Nagasaki, Nagasaki, Japan
| | - Caroline Corless
- Liverpool University Hospital Foundation Trust, Prescot Street, Liverpool, L7 8XP, UK
| | - Jon van Aartsen
- Liverpool University Hospital Foundation Trust, Prescot Street, Liverpool, L7 8XP, UK
| | - Alex Howard
- Liverpool University Hospital Foundation Trust, Prescot Street, Liverpool, L7 8XP, UK
| | - Issra Bulgasim
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Alice J Fraser
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Emily R Adams
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Adam P Roberts
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Thomas Edwards
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK.
| |
Collapse
|
10
|
Hubbard ATM, Bulgasim I, Roberts AP. A novel hemA mutation is responsible for a small-colony-variant phenotype in Escherichia coli. MICROBIOLOGY-SGM 2020; 167. [PMID: 32762803 DOI: 10.1099/mic.0.000962] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We identified a small colony variant (SCV) of an amoxicillin/clavulanic acid-resistant derivative of a clinical isolate of Escherichia coli from Malawi, which was selected for in vitro in a subinhibitory concentration of gentamicin. The SCV was auxotrophic for hemin and had impaired biofilm formation compared to the ancestral isolates. A single novel nucleotide polymorphism (SNP) in hemA, which encodes a glutamyl-tRNA reductase that catalyses the initial step of porphyrin biosynthesis leading to the production of haem, was responsible for the SCV phenotype. We showed the SNP in hemA resulted in a significant fitness cost to the isolate, which persisted even in the presence of hemin. However, the phenotype quickly reverted during sequential sub-culturing in liquid growth media. As hemA is not found in mammalian cells, and disruption of the gene results in a significant fitness cost, it represents a potential target for novel drug development specifically for the treatment of catheter-associated urinary tract infections caused by E. coli.
Collapse
Affiliation(s)
- Alasdair T M Hubbard
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Issra Bulgasim
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Adam P Roberts
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| |
Collapse
|
11
|
Hubbard ATM, Newire E, Botelho J, Reiné J, Wright E, Murphy EA, Hutton W, Roberts AP. Isolation of an antimicrobial-resistant, biofilm-forming, Klebsiella grimontii isolate from a reusable water bottle. Microbiologyopen 2020; 9:1128-1134. [PMID: 32126585 PMCID: PMC7294305 DOI: 10.1002/mbo3.1023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 01/31/2020] [Accepted: 02/14/2020] [Indexed: 12/14/2022] Open
Abstract
A reusable water bottle was swabbed as part of the citizen science project "Swab and Send," and a Klebsiella grimontii isolate was recovered on chromogenic agar and designated SS141. Whole-genome sequencing of SS141 showed it has the potential to be a human pathogen as it contains the biosynthetic gene cluster for the potent cytotoxin, kleboxymycin, and genes for other virulence factors. The genome also contains the antibiotic-resistant genes, blaOXY-6-4 , and a variant of fosA, which is likely to explain the observed resistance to ampicillin, amoxicillin, and fosfomycin. We have also shown that SS141 forms biofilms on both polystyrene and polypropylene surfaces, providing a reasonable explanation for its ability to colonize a reusable water bottle. With the increasing use of reusable water bottles as an alternative to disposables and a strong forecast for growth in this industry over the next decade, this study highlights the need for cleanliness comparable to other reusable culinary items.
Collapse
Affiliation(s)
- Alasdair T M Hubbard
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Enas Newire
- School of Pharmacy, College of Science, University of Lincoln, Lincoln, UK
| | - João Botelho
- Antibiotic Resistance Evolution Group, Max-Planck-Institute for Evolutionary Biology, Plön, Germany.,Department of Evolutionary Ecology and Genetics, Zoological Institute, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
| | - Jesús Reiné
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Elli Wright
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Emma A Murphy
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, UK
| | - William Hutton
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Adam P Roberts
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, UK
| |
Collapse
|
12
|
Clarke L, Pelin A, Phan M, Wong A. The effect of environmental heterogeneity on the fitness of antibiotic resistance mutations in Escherichia coli. Evol Ecol 2020. [DOI: 10.1007/s10682-019-10027-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|