U.S. flag

An official website of the United States government


Send to:

Choose Destination

SRX17025612: GSM6443563: F. tularensis 2 hours post exposure to 0.125 µg/ml (0.5xMIC) Doxycycline 1st duplicate; Francisella tularensis subsp. tularensis SCHU S4; RNA-Seq
1 ILLUMINA (Illumina HiSeq 2000) run: 37.6M spots, 3.8G bases, 1.3Gb downloads

External Id: GSM6443563_r1
Submitted by: Biochemistry and Molecular Genetics, Israel Institute for Biological Research
Study: Transcriptome RNA Sequencing Data Sets of Francisella tularensis tularensis SchuS4 upon treatment with various concentrations of Doxycycline or Ciprofloxacin antibiotics
show Abstracthide Abstract
Francisella tularensis, the etiological agnet of Tularemia is a Category A select agent. Preparedness means for prompt proper antibiotic treatment are of need to prevent morbidity and mortality. While standard antimicrobial susceptibility tests are time consuming, the quantification of the changes in the expression levlels of specific mRNA markers folowing antibiotic exposure may enable a rapid determination of antimicrobial susceptibility. We submit transcriptomic data sets detailing global gene expression of F. tularensis following exposure to Doxycycline or Ciprofloxacin antibiotics. Overall design: F. tularensis SchuS4 colonies isolated on Cyctine Heart Agar (CHA) plates at 37oC were suspended in cation- adjusted Muller-Hinton broth, supplemented with 2% IsoVitaleX and 3 µM hematin (HLMHI) growth medium, to 5x105 CFU/ml. Suspended bacteria (200 ml) were grown for 2h (37oC, 200 rpm) to adjust the culture to the growth media. 50 ml of the adjusted bacterial culture were transferred into each of three 250 ml Erlenmeyer flasks and incubated in the presence of 0.5/1 x Minimal Inhibitory Concentration (MIC) of Ciprofloxacin/Doxycycline for 2 hours, followed by centrifugation (20 min., 4oC, 4,000xg). Bacterial pellets were resuspended in 1 ml cold PBS, transferred into Eppendorf tubes, centrifuged (5 min., 10K rpm at 400C), and pellets were frozen by liquid nitrogen and kept at -700C until RNA extraction. Growth control samples were grown under same conditions w/o antibiotic. The Ciprofloxacin / Doxycycline exposure experiments were done each by independent duplicated biological experiment. Total RNA purification and residual DNA elimination were done by the Rneasy Mini kit and Rnase-free Dnase kit (QUIGEN) according to the manufacturer's instructions. Experiments were performed using biosafety level 3 (BSL-3) containment and procedures. Sterile RNA samples were transferred to BSL-2 lab for following procedures. RNA concentration was determined by the NanoDrop ND-1000 spectrophotometer and RNA quality was determined by using the Agilent 2100 Bioanalyzer with the "Prokaryote Total RNA Pico" chip. All RNA samples showed RNA Integrity Number (RIN value) of >9. RNA samples were kept at -700C until used. Transcriptomic analysis was carried out by the RNA-seq method, at the Genome center, Columbia University.
Sample: F. tularensis 2 hours post exposure to 0.125 µg/ml (0.5xMIC) Doxycycline 1st duplicate
SAMN30244795 • SRS14610504 • All experiments • All runs
Name: GSM6443563
Instrument: Illumina HiSeq 2000
Strategy: RNA-Seq
Selection: cDNA
Layout: SINGLE
Construction protocol: Total RNA was extracted using the RNeasy kit (Qiagen), residual DNA was digested using RNase-free DNase (Qiagen). Library construction using Illumina TruSeq chemistry
Runs: 1 run, 37.6M spots, 3.8G bases, 1.3Gb
Run# of Spots# of BasesSizePublished


Supplemental Content

Recent activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...