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Abstract
Antimicrobial resistance (AMR) genes are widely disseminated on plasmids. Therefore, interventions aimed at blocking plasmid uptake and transfer may curb the spread of AMR. Previous studies have used CRISPR-Cas-based technology to remove plasmids encoding AMR genes from target bacteria, using either phage- or plasmid-based delivery vehicles that typically have narrow host ranges. To make this technology feasible for removal of AMR plasmids from multiple members of complex microbial communities, an efficient, broad host-range delivery vehicle is needed. We engineered the broad host-range IncP1-plasmid pKJK5 to encode cas9 programmed to target an AMR gene. We demonstrate that the resulting plasmid pKJK5::csg has the ability to block the uptake of AMR plasmids and to remove resident plasmids from Escherichia coli . Furthermore, due to its broad host range, pKJK5::csg successfully blocked AMR plasmid uptake in a range of environmental, pig- and human-associated coliform isolates, as well as in isolates of two species of Pseudomonas . This study firmly establishes pKJK5::csg as a promising broad host-range CRISPR-Cas9 delivery tool for AMR plasmid removal, which has the potential to be applied in complex microbial communities to remove AMR genes from a broad range of bacterial species.
- Received:
- Accepted:
- Published Online:
Funding
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H2020 European Research Council
(Award ERC-STG-2016-714478)
- Principle Award Recipient: EdzeR Westra
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Bundesministerium für Bildung und Forschung
(Award 01LC1904A)
- Principle Award Recipient: UliKlümper
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JPI-AMR HARISSA
(Award MISTAR)
- Principle Award Recipient: Stinekevan Houte
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Lister Institute of Preventive Medicine
- Principle Award Recipient: Stinekevan Houte
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Biotechnology and Biological Sciences Research Council
(Award BB/S017674/1)
- Principle Award Recipient: Stinekevan Houte
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Biotechnology and Biological Sciences Research Council
(Award BB/R010781/1)
- Principle Award Recipient: Stinekevan Houte
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Medical Research Council
(Award MR/N0137941/1)
- Principle Award Recipient: DavidWalker-Sünderhauf