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Transcription profiling of Pseudomonas aeruginosa treated with tobramycin

ABSTRACT: This SuperSeries is composed of the following subset Series:; GSE9989: Tobramycin Treatment of P. aeruginosa Biofilms Grown on CFBE41o- Cells; GSE9991: Tobramycin Treatment of Planktonic Pseudomonas aeruginosa Experiment Overall Design: Refer to individual Series

ORGANISM(S): Pseudomonas aeruginosa

SUBMITTER: George O'Toole

PROVIDER: E-GEOD-10030 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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In vitro analysis of tobramycin-treated Pseudomonas aeruginosa biofilms on cystic fibrosis-derived airway epithelial cells.

Anderson Gregory G GG Moreau-Marquis Sophie S Stanton Bruce A BA O'Toole George A GA

Infection and immunity 20080122 4

P. aeruginosa forms biofilms in the lungs of individuals with cystic fibrosis (CF); however, there have been no effective model systems for studying biofilm formation in the CF lung. We have developed a tissue culture system for growth of P. aeruginosa biofilms on CF-derived human airway cells that promotes the formation of highly antibiotic-resistant microcolonies, which produce an extracellular polysaccharide matrix and require the known abiotic biofilm formation genes flgK and pilB. Treatment ...[more]

PMID: 18212077

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Transcription profiling of planktonic pseudomonas aeruginosa exposed to tobramycin treatment

Project description:As a comparison to tobramycin-treated P. aeruginosa biofilms, we investigated the response of planktonic P. aeruginosa to tobramycin by microarray. Experiment Overall Design: We included 2 control (untreated) cultures and 2 tobramycin-treated cultures. We used mid-exponential phase cultures of P. aeruginosa PA14. Replicate cultures were incubated in the presence or absence of 5 Î¼g/mL tobramycin for 30 minutes at 37Â°C.

2008-06-21 | E-GEOD-9991 | biostudies-arrayexpress

Transcription profiling of P. aeruginosa biofilms treated with tobramycin grown on CFBE41o- cells

Project description:We grew Pseudomonas aeruginosa biofilms on CFBE41o- human airway cells in culture, and we treated these biofilms with tobramycin. Microarray analysis was performed to gain an understanding of the global transcriptional changes that occur during antibiotic treatment. Experiment Overall Design: We compared three untreated control samples with three tobramycin-treated samples. Biofilms were grown on CFBE41o- cells in culture for 9 hours in MEM/0.4% arginine. Replicate samples were then incubated in the presence or absence of 500 Î¼g/mL tobramycin for 30 minutes.

2008-06-18 | E-GEOD-9989 | biostudies-arrayexpress

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Experimental evolution of Pseudomonas aeruginosa biofilms exposed to furanone C-30 with and without tobramycin

Project description:The aim of this study is to evaluate the evolutionary robustness of the quorum sensing inhibitor (QSI) furanone C-30 for the treatment of P. aeruginosa biofilm infections. We repeatedly exposed P. aeruginosa biofilms to furanone C-30 (with or without tobramycin) in the synthetic cystic fibrosis sputum medium (SCFM2) and characterized the genotype and phenotype of the evolved lineages. P. aeruginosa biofilms were grown in SCFM2 for 24 h after which the treatment in fresh SCFM2 was added to obtain a final concentration of 20 µg/ml tobramycin and 100 µg/ml furanone C-30. The negative control was treated with fresh SCFM2, including the same amount of DMSO (0.25%) as for the biofilms treated with C-30. After 24 h of static incubation at 37°C, biofilms were sonicated and vortexed in order to disintegrate the biofilm aggregates. After each cycle the number of CFU was determined and an aliquot of the culture was stored at -80°C in Microbank vials to allow further tests on the evolved strains. A sample from the treated biofilm was used to prepare a new overnight culture, in order to start a new cycle. For each treatment three independent lineages were established, that were each exposed for 16 cycles. Whole-genome sequencing was performed on the wild type P. aeruginosa PAO1 and on the exposed lineages after 5, 10 and 16 cycles.

2021-03-05 | E-MTAB-10124 | biostudies-arrayexpress

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2021-09-09 | PXD023445 | Pride

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