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Phenotypic convergent evolution towards fosfomycin collateral sensitivity of Pseudomonas aeruginosa antibiotic resistant mutants

ABSTRACT: Phenotypic convergent evolution towards fosfomycin collateral sensitivity of Pseudomonas aeruginosa antibiotic resistant mutants

PROVIDER: PRJNA641152 | ENA |

REPOSITORIES: ENA

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Phenotypic convergent evolution towards fosfomycin collateral sensitivity of Pseudomonas aeruginosa antibiotic resistant mutants

Project description:In this work we describe a robust fosfomycin collateral sensitivity phenotype of Pseudomonas aeruginosa resistant mutants selected by antibiotics from different structural families. The underlying mechanism was the reduced expression of the genes encoding the peptidoglycan-recycling pathway, which preserves the peptidoglycan synthesis in situations where the de novo synthesis is blocked, and of fosA, encoding a fosfomycin-inactivating enzyme.

2022-03-02 | GSE153006 | GEO

Collateral sensitivity of antibiotic resistant bacteria to antimicrobial peptides

Project description:Cationic antimicrobial peptides (CAPs) are promising novel alternatives to conventional antibacterial agents, but the overlap in resistance mechanisms between small-molecule antibiotics and CAPs is unknown. Does evolution of antibiotic resistance decrease (cross-resistance) or increase (collateral sensitivity) susceptibility to CAPs? We systematically addressed this issue by studying the susceptibilities of a comprehensive set of antibiotic resistant Escherichia coli strains towards 24 antimicrobial peptides. Strikingly, antibiotic resistant bacteria frequently showed collateral sensitivity to CAPs, while cross-resistance was relatively rare. We identified clinically relevant multidrug resistance mutations that simultaneously elevate susceptibility to certain CAPs. Transcriptome and chemogenomic analysis revealed that such mutations frequently alter the lipopolysaccharide composition of the outer cell membrane and thereby increase the killing efficiency of membrane-interacting antimicrobial peptides. Furthermore, we identified CAP-antibiotic combinations that rescue the activity of existing antibiotics and slow down the evolution of resistance to antibiotics. Our work provides a proof of principle for the development of peptide based antibiotic adjuvants that enhance antibiotic action and block evolution of resistance.

2018-03-29 | GSE96706 | GEO

Collateral Sensitivity Pseudomonas

Project description:Phenotypic convergence in response to drug exposure supports exploitation of collateral sensitivity to counter drug resistance

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collateral effects

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Collateral sensitivity associated with antibiotic resistance plasmids.

Project description: Not available

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Reciprocal antibiotic collateral sensitivity in Burkholderia multivorans.

Project description: Not available

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Phenotypic Proteomic Profiling Reveals Convergent Kinase Targets for Circadian Clock Modulators

Project description:Determining the mechanisms of action of drug molecules that modulate circadian rhythms is critical to develop novel compounds to treat clock disorders. Here we employed Phenotypic Proteomic Profiling (PPP) integrating multipronged proteomics approaches including global proteome, phosphoproteome, kinome mapping, and proteome-wide profiling of thermal stability (TPP) to systematically determine convergent molecular targets of four circadian period lengthening compounds (Longdaysin, Roscovitine, Purvalanol A, and SP600125) in human cells. We demonstrate convergent changes in phosphorylation level and activity of several proteins and kinases involved in vital signaling pathways including MAPK, NGF, BCR, AMPK, and mTOR signaling by the compounds. Kinome profiling using desthiobiotin-ATP enrichment quantitative proteomics and radiometric assays further indicated inhibition of CKId, ERK1/2, CDK2/7, TNIK and STK26 activity as a common mechanism of action for the compounds. Pharmacological or genetic inhibition of several convergent kinases resulted in circadian period lengthening, establishing them as novel bone fide circadian targets. TPP analysis using live cells revealed binding of these drugs to clock regulatory kinases, signaling molecules, and ubiquitination mediator (F-box) proteins. Phenotypic proteomic profiling thus establishes a set of novel circadian clock effectors.

2019-11-25 | PXD014186 | Pride

<i>Burkholderia multivorans</i> Exhibits Antibiotic Collateral Sensitivity.

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Molecular mechanisms of collateral sensitivity to the antibiotic nitrofurantoin.

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transcriptome-wide collateral effects of Cas13d variants

Project description:The intrinsic collateral cleavage activity of Cas13d,which refers to the gRNA-independent degradation of bystander RNA, significantly limits its therapeutic potential. To extensively evaluate the collateral effects of hpCas13d genome-wide, we conducted RNA-seq analysis of the transcriptome in HEK293T cells after the transfections with dCas13d, wtCas13d, hpCas13d, and hfCas13d . Compared to dCas13d, wtCas13d with a PPIA gRNA (reported to induce the significant collateral cleavage) resulted in significant downregulations of thousands genes. In sharp contrast, hpCas13d and hfCas13d showed much less off-target genes, respectively. These findings demonstrate that hpCas13d exhibits reduced collateral activity, rendering it suitable for in vivo applications.

2024-02-28 | GSE260500 | GEO

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