Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Pyrrole-based inhibitors of RND-type efflux pumps reverse antibiotic resistance and display antivirulence potential

ABSTRACT: Pyrrole-based inhibitors of RND-type efflux pumps reverse antibiotic resistance and display antivirulence potential

PROVIDER: PRJNA865169 | ENA |

REPOSITORIES: ENA

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
	SRR20749417_1.fastq.gz	Fastqsanger.gz
	SRR20749417_2.fastq.gz	Fastqsanger.gz
	SRR20749418_1.fastq.gz	Fastqsanger.gz
	SRR20749418_2.fastq.gz	Fastqsanger.gz
	SRR20749419_1.fastq.gz	Fastqsanger.gz

Items per page:

1 - 5 of 12

Similar Datasets

Pyrrole-based inhibitors of RND-type efflux pumps reverse antibiotic resistance and display antivirulence potential

Project description:Efflux pumps of the resistance-nodulation-division (RND) superfamily, particularly the AcrAB-TolC and MexAB-OprM, besides mediating intrinsic and acquired resistance, also intervene in bacterial pathogenicity. Inhibitors of such pumps could restore activities of antibiotics and curb bacterial virulence. Here, we identify pyrrole-based compounds that boost antibiotic activity in Escherichia coli and Pseudomonas aeruginosa by inhibiting their archetype RND transporters. The discovered efflux pump inhibitors (EPIs) inhibit the efflux of fluorescent probes, attenuate persister formation, and diminish resistant mutant development. Molecular docking and biophysical studies revealed that the EPIs bind to AcrB. EPIs also possess an anti-pathogenic potential and attenuate P. aeruginosa virulence in vivo. The excellent efficacy of the EPI-antibiotic combination was evidenced in animal lung infection and sepsis protection models. These findings indicate that EPIs discovered herein with no off-target effects and negligible toxicity are potential antibiotic adjuvants to address life-threatening bacterial infections.

2024-03-18 | GSE210309 | GEO

Physiology of Pseudomonas aeruginosa cells without major RND-type multidrug efflux pumps

Project description:Purpose: In this study, we analyzed how P. aeruginosa physiology is adapted to the lack of RND-mediated efflux activities. Methods: In this study, we use PΔ6 cells to analyze how P. aeruginosa changes its physiology in response to the lack of efflux pumps and increased permeability of the cell envelope. We compared the transcriptomes of the exponentially growing and stationary PΔ6 and its parent PAO1 cells and identified the cellular functions stressed by the lack of active efflux. High quality total RNA was further processed by removing 23S and 16S rRNAs using the Illumina Ribo-Zero Plus rRNA Depletion kit. Samples were analyzed in duplicate using Illumina MiSeq. Raw data for each sample was analyzed using CLC Genomics Workbench version 12.0.1 software (QIAGEN Aarhus, Denmark). Results: P. aeruginosa PΔ6 strain lacking six best characterized RND pumps activates a specific adaptation response that involves significant changes in expression of specific subset of genes encoding e.g. several transport systems, quorum sensing or iron acquisition. Conclusion: Our results suggest that all changes we observe serve to protect the cell envelope of efflux-deficient P. aeruginosa.

2021-04-30 | GSE169036 | GEO

Physiology of Pseudomonas aeruginosa cells without major RND-type multidrug efflux pumps

Project description:Physiology of Pseudomonas aeruginosa cells without major RND-type multidrug efflux pumps

| PRJNA714944 | ENA

Mutations in Multidrug Efflux Pumps of Eshcerichia coli

Project description:The number and overlapping substrate repertoire of multidrug efflux pumps in the E. coli genome suggest a physiological role apart from multidrug resistance. This role was investigated using transcriptomic analyses of cDNAs labeled from E. coli AG102 mRNA (hyper drug resistant, marR1) and its isogenic major efflux pump mutants. Keywords: Mutation Analysis

2008-03-11 | GSE10757 | GEO

A genetic platform to investigate the functions of bacterial drug efflux pumps

Project description:Efflux pumps are a significant challenge for the development of new antibacterial agents. Overcoming efflux requires an in-depth understanding of efflux pump functions, substrate specificities, and the development of inhibitors. However, the complexities of drug efflux networks have limited such studies. To address these challenges, we report the generation of Efflux KnockOut-35 (EKO-35), a highly susceptible Escherichia coli strain lacking 35 efflux pumps. We demonstrate the utility of this strain by constructing an efflux platform consisting of strains individually expressing genes encoding efflux pumps forming tripartite complexes with the outer membrane channel TolC. This platform was profiled against a curated diverse compound collection, which enabled us to define physicochemical properties that contribute to transport. We also show the E. coli drug efflux network is conditionally essential for growth, and that the platform can be used to investigate efflux pump inhibitor specificities and also efflux pump interplay. We believe EKO-35 and the efflux platform will have widespread application for the study of drug efflux.

2022-08-31 | PXD033975 | Pride

Pyrrole-based inhibitors of RND-type efflux pumps reverse antibiotic resistance and display anti-virulence potential.

Project description:Efflux pumps of the resistance-nodulation-cell division (RND) superfamily, particularly the AcrAB-TolC, and MexAB-OprM, besides mediating intrinsic and acquired resistance, also intervene in bacterial pathogenicity. Inhibitors of such pumps could restore the activities of antibiotics and curb bacterial virulence. Here, we identify pyrrole-based compounds that boost antibiotic activity in Escherichia coli and Pseudomonas aeruginosa by inhibiting their archetype RND transporters. Molecular docking and biophysical studies revealed that the EPIs bind to AcrB. The identified efflux pump inhibitors (EPIs) inhibit the efflux of fluorescent probes, attenuate persister formation, extend post-antibiotic effect, and diminish resistant mutant development. The bacterial membranes remained intact upon exposure to the EPIs. EPIs also possess an anti-pathogenic potential and attenuate P. aeruginosa virulence in vivo. The intracellular invasion of E. coli and P. aeruginosa inside the macrophages was hampered upon treatment with the lead EPI. The excellent efficacy of the EPI-antibiotic combination was evidenced in animal lung infection and sepsis protection models. These findings indicate that EPIs discovered herein with negligible toxicity are potential antibiotic adjuvants to address life-threatening Gram-negative bacterial infections.

| S-EPMC11003683 | biostudies-literature

Deciphering the role of RND efflux transporters in Burkholderia cenocepacia D4

Project description:To compare the expression profile of B. cenocepacia mutants impaired in RND efflux pump encoding genes

2011-04-23 | E-MEXP-2999 | biostudies-arrayexpress

Deciphering the role of RND efflux transporters in Burkholderia cenocepacia D9 and D4-D9

Project description:To compare the expression profile of B. cenocepacia mutants impaired in RND efflux pump encoding genes

2011-04-23 | E-MEXP-2997 | biostudies-arrayexpress

The impaired quorum sensing response of MexAB-OprM efflux pump overexpressing mutants is not due to non-physiological efflux of 3-oxo-C12-HSL

Project description:Multidrug (MDR) efflux pumps are ancient and conserved molecular machineries with relevant roles in different aspects of the bacterial physiology, besides antibiotic resistance. In the case of the environmental opportunistic pathogen Pseudomonas aeruginosa, it has been shown that overexpression of different efflux pumps is linked to the impairment of the quorum sensing (QS) response. Nevertheless, the causes of such impairment are different for each analyzed efflux pump. Herein, we performed an in-depth analysis of the QS-mediated response of a P. aeruginosa antibiotic resistant mutant that overexpresses MexAB-OprM. Although previous work claimed that this efflux pump extrudes the QS signal 3-oxo-C12-HSL, we show otherwise. Our results evidence that the observed attenuation in the QS response when overexpressing this pump is related to an impaired production of alkyl quinolone QS signals, likely prompted by the reduced availability of one of their precursors, the octanoate. Together with previous studies, this indicates that, although the consequences of overexpressing efflux pumps are similar (impaired QS response), the underlying mechanisms are different. This ‘apparent redundancy' of MDR efflux systems can be understood as a P. aeruginosa strategy to keep the robustness of the QS regulatory network and modulate its output in response to different signals.

2021-10-25 | GSE153996 | GEO

Bile-induced biofilm formation in Bacteroides thetaiotaomicron requires magnesium efflux by an RND pump

Project description:The study is about the role of Bacteroides thetaiotaomicron in the human gut microbiota, specifically its ability to form biofilms in response to bile salts. The study found that bile induces the expression of certain efflux pumps, and inhibiting these pumps impairs biofilm formation. Among the induced pumps, the BipABC pump is crucial for biofilm formation as it is involved in the efflux of magnesium, which affects the biofilm's extracellular matrix and structure. This discovery sheds light on how intestinal chemical cues, like bile salts, regulate biofilm formation in B. thetaiotaomicron, a significant gut symbiont.

2024-03-19 | E-MTAB-13460 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data