Environment shapes the accessible daptomycin resistance mechanisms in enterococcus faecium

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dc.contributor.authorPrater, Amy G.
dc.contributor.authorMehta, Heer H.
dc.contributor.authorKosgei, Abigael J.
dc.contributor.authorMiller, William R.
dc.contributor.authorTran, Truc T.
dc.contributor.authorArias, Cesar A.
dc.contributor.authorShamoo, Yousif
dc.date.accessioned2020-03-20T20:05:04Z
dc.date.available2020-03-20T20:05:04Z
dc.date.issued2019
dc.description.abstractenglishDaptomycin binds to bacterial cell membranes and disrupts essential cell envelope processes, leading to cell death. Bacteria respond to daptomycin by altering their cell envelopes to either decrease antibiotic binding to the membrane or by diverting binding away from septal targets. In Enterococcus faecalis, daptomycin resistance is typically coordinated by the three-component cell envelope stress response system, LiaFSR. Here, studying a clinical strain of multidrug-resistant Enterococcus faecium containing alleles associated with activation of the LiaFSR signaling pathway, we found that specific environments selected for different evolutionary trajectories, leading to high-level daptomycin resistance. Planktonic environments favored pathways that increased cell surface charge via yvcRS upregulation of dltABCD and mprF, causing a reduction in daptomycin binding. Alternatively, environments favoring complex structured communities, including biofilms, evolved both diversion and repulsion strategies via divIVA and oatA mutations, respectively. Both environments subsequently converged on cardiolipin synthase (cls) mutations, suggesting the importance of membrane modification across strategies. Our findings indicate that E. faecium can evolve diverse evolutionary trajectories to daptomycin resistance that are shaped by the environment to produce a combination of resistance strategies. The accessibility of multiple and different biochemical pathways simultaneously suggests that the outcome of daptomycin exposure results in a polymorphic population of resistant phenotypes, making E. faecium a recalcitrant nosocomial pathogen.eng
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1128/AAC.00790-19
dc.identifier.instnameinstname:Universidad El Bosquespa
dc.identifier.issn0066-4804
dc.identifier.reponamereponame:Repositorio Institucional Universidad El Bosquespa
dc.identifier.repourlrepourl:https://repositorio.unbosque.edu.co
dc.identifier.urihttps://hdl.handle.net/20.500.12495/2078
dc.language.isoeng
dc.publisherAmerican Society for Microbiologyspa
dc.publisher.journalAntimicrobial Agents and Chemotherapyspa
dc.relation.ispartofseriesAntimicrobial Agents and Chemotherapy, 0066-4804, 2019spa
dc.relation.urihttps://aac.asm.org/content/63/10/e00790-19.long
dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.rights.accessrightshttps://purl.org/coar/access_right/c_abf265
dc.rights.creativecommons2019
dc.rights.localAcceso cerradospa
dc.subject.decsDaptomicinaspa
dc.subject.decsPéptidos cíclicosspa
dc.subject.decsBacterias grampositivasspa
dc.titleEnvironment shapes the accessible daptomycin resistance mechanisms in enterococcus faeciumspa
dc.title.translatedEnvironment shapes the accessible daptomycin resistance mechanisms in enterococcus faecium
dc.typearticlespa
dc.type.hasversioninfo:eu-repo/semantics/publishedVersion
dc.type.localartículospa

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