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Sample GSM930481 Query DataSets for GSM930481
Status Public on May 12, 2012
Title Muscle_AQM_6h-4d_unloaded_UU33
Sample type RNA
 
Source name gastrocnemius muscle, treated with non-depolarizing NMBA and mechanically ventilated, 6h to 4d group, unloaded leg
Organism Rattus norvegicus
Characteristics strain: Sprague-Dawley
gender: female
tissue: gactrocnemius muscle
treatment_1: non-depolarizing neuromuscular blocking agent (NMBA)
treatment_2: no loading
time: 6hr-4 days
Treatment protocol Briefly, the following surgery and instrumentation was completed with sterile technique: 1) Precordial silver wire electrocardiogram (ECG) electrodes were implanted subcutaneously. 2) An aortic catheter (28-gauge Teflon) was inserted via the left carotid artery to record arterial blood pressure. 3) A 0.9-mm Renathane catheter was threaded into the left jugular vein to administer parental solutions. 4) Three subcutaneous EEG needle electrodes were placed into the skull above the right and left temporal lobes, and a third reference electrode was placed in the neck region. 5) Temperature was measured by a vaginal thermistor and servo-regulated at 37°C. 6) A silicone cannula was inserted in the urethra to continuously record urine output.
During surgery or any possible irritating manipulation, the anesthetic isoflurane level was at >1.5%, which maintained the following states: 1) the electroencephalogram (EEG) was synchronized and dominated by high-voltage slow-wave activity; 2) mean arterial pressure was 100 mmHg, the heart rate, 420 beats/min, and 3) there were no evident EEG, blood pressure or heart rate responses to surgical manipulation. Isoflurane was delivered into the inspiratory gas stream by a precision mass-flow controller. After the initial surgery, Isoflurane was gradually lowered (over 1-2 days) and maintained at <0.5% during the remaining experimental period. Rats were ventilated through a per os coaxial tracheal cannula at 72 breaths/min with an inspiratory and expiratory ratio of 1:2 and a minute volume of 180–200 ml and gas concentrations of 50% O2, 47% N2, and 3% CO2, delivered by a precision volumetric respirator. Intermittent respiratory hyperinflations (6 per hour at 15 cmH2O), positive end-expiratory pressure (1.5 cmH2O), and expiratory CO2 monitoring were continuous. Neuromuscular blockade (NMBA) was induced on the first day (100 µg iv. alpha-cobrotoxin) and maintained by continuous infusion (250 µg/day, iv). Mechanical ventilation was initiated immediately after the NMBA induction. The left leg of the animal was activated for 6 hours at the shortest duration and 12 hours per day at durations 12 hours and longer throughout the experiment, using a mechanical lever arm that produced a continuous passive maximal ankle joint flexions-extensions at a speed of 13.3 cycles per minute. Gastrocnemius muscles were dissected from the loaded left leg and the unloaded right leg immediately after euthanasia.
Extracted molecule total RNA
Extraction protocol Total RNA was extracted according to the standard Affymetrix protocol including Trizol extraction and RNeasy column cleanup.
Label biotin
Label protocol Biotinylated cRNA were prepared according to the standard Affymetrix protocol from 3 g total RNA (Expression Analysis Technical Manual, 2007, Affymetrix).
 
Hybridization protocol Following fragmentation, 10 ug of cRNA were hybridized for 16 hr at 45C on Affymetrix Rat Gene 1.0 ST Arrays. GeneChips were washed and stained in the Affymetrix Fluidics Station 450.
Scan protocol GeneChips were scanned using the GeneChip Scanner 3000.
Description Experimental rat ICU model. AQM.
Unloaded leg.
UU33_100216
Data processing Analyses of the gene expression data were carried out in the freely available statistical computing language R using packages available from the Bioconductor project. The raw data were normalized using the robust multi-array average (RMA), background-adjusted, and log-transformed summarized values as first suggested by Li and Wong in 2001.
 
Submission date May 11, 2012
Last update date May 12, 2012
Contact name Monica Llano-Diez
Organization name Uppsala university
Department Neuroscience
Lab Clinical neurophysilogy
Street address Akademiska sjukhuset, Ing.85, 3tr
City Uppsala
ZIP/Postal code 75185
Country Sweden
 
Platform ID GPL6247
Series (1)
GSE37944 Sparing of muscle mass and function by passive loading in an experimental intensive care unit model

Data table header descriptions
ID_REF
VALUE RMA-calculated signal intensity

Data table
ID_REF VALUE
10815663 5.674159
10802023 5.334702
10799346 6.650163
10855114 3.280514
10872098 8.548567
10852144 9.143151
10803947 6.981856
10717233 8.906828
10908776 4.929372
10749874 8.266372
10822348 7.508667
10858275 5.426998
10833152 5.905602
10752405 5.300681
10841806 6.483877
10881109 8.487116
10742927 3.960765
10939435 6.683125
10721875 4.960121
10909080 6.137964

Total number of rows: 26208

Table truncated, full table size 457 Kbytes.




Supplementary file Size Download File type/resource
GSM930481_PA079_UU33_100216_RaGene-1_0-st-v1_.CEL.gz 3.7 Mb (ftp)(http) CEL
Processed data included within Sample table

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