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Sample GSM397625 Query DataSets for GSM397625
Status Public on Oct 27, 2009
Title liver and spike ins vs. synthetic miRNA pool (6)
Sample type mixed
Channel 1
Source name liver + 75 synthetic RNAs (spike ins)
Organism Mus musculus
Characteristics strain: CD1
gender: female
age: 8 weeks
tissue: liver
type: WT
Extracted molecule total RNA
Extraction protocol total RNA as described in: Chomczynski P. (1993). A reagent for the single-step simultaneous isolation of RNA, DNA and proteins from cell and tissue samples. Biotechniques. 1993 Sep;15(3):532-4, 536-7
Label Hy5
Label protocol 1 µg total RNA and the spike ins (0.15625-10 fmol) were labelled using a commercial kit (miRCuryTM LNA microRNA Array Power labeling kit, Exiqon) following the instructions of the manufacturer
Channel 2
Source name synthetic miRNA pool
Organism synthetic construct
Characteristics type: synthetic miRNA
Extracted molecule other
Extraction protocol n/a
Label Hy3
Label protocol 2.5 fmol of each of 891 synthetic miRNAs were pooled and labelld using a commercial kit (miRCuryTM LNA microRNA Array Power labeling kit, Exiqon) following the instructions of the manufacturer
Hybridization protocol 1 µg of respective total RNA were mixed with 75 spike in synthetic RNAs (which are not expressed in mouse liver) and 2.5 fmol of each of 18 RNA oligonucleotides reverse complement to miRControl 3 probes and subsequently fluorescently labelled by 3’ ligation. Total RNA mix was hybridized in a dual colour approach to microarrays versus a second labelled synthetic miRNA pool. The synthetic miRNA pool consisted of 2.5 fmol of each of 891 non redundant miRNAs sequences and miRControl 3 seqeunces. Hybridization was performed using an automated hybridization machine (a-Hyb, Miltenyi Biotec). Briefly, volume of labelled sample was adjusted to 100 µl with nuclease-free water and 100 µl 2x Hybridization Solution pre-warmed at 42°C was added. After mixing, the solution was pre-heated to 60 °C for 2 min prior to application to the a-Hyb. Microarray processing in the a-Hyb was as follows: incubation in Pre-Hyb Solution for 5 min at 42°C, hybridization with the labeled RNAs for 960 min at 42°C, wash with Wash Buffer I for 1 min at 10°C (2 cycles), and second wash with Wash Buffer II for 1 min at 10°C (2 cycles). Pump speed at all incubations was set to 1 ml/min. Microarrays were blow-dried and scanned with the ScanArray Lite (GSI Lumonics, Watertown, MA) and the Agilent DNA-Microarray Scanner.
Scan protocol Image capture was done with Agilent DNA-Microarray Scanner (Agilent, Santa Clara, CA)
Description PMID
Data processing Signal processing and quantification was done with ImaGene software version 8.0 (BioDiscovery, Los Angeles, CA). For each spot, the local signal was measured inside a fixed circle of 230-280 µm diameter, and background was measured outside the circle within specified rings 30 µm distant to the signal and 100 µm wide. Signal and background was taken to be the average of pixels between defined low and high percentages of maximum intensity with percentage parameter settings for low/high being 2/97% for signal and 0/97% for background. Local background was subtracted from the signal to obtain the net signal intensity and the mean of the net signal intensities of 4 corresponding spots representing the same miRNA was computed for those spots only which were unflagged (empty spots, poor spots, negative spots) and for which the fluorescent intensity in of the miRNAs derived from the samples of interest was two-fold the mean background value (2bkg dataset). Subsequently,the array data was normalized by calculating the median of the miRControl 3 present in the liver and UR sample.
Submission date Apr 24, 2009
Last update date Jun 26, 2012
Contact name Ute Bissels
Organization name Miltenyi Biotec GmbH
Department R&D
Street address Friedrich-Ebert-Str. 68
City Bergisch Gladbach
State/province NRW
ZIP/Postal code 51429
Country Germany
Platform ID GPL8441
Series (1)
GSE15835 Absolute quantification of miRNAs

Data table header descriptions
VALUE normalized ratio defined as Ch2/Ch1 (valid data of up to 4 reps used only)

Data table
1 0.060389
5 2.952561
6 0.014999
8 1.717231
10 0.048538
20 0.144274

Total number of rows: 1471

Table truncated, full table size 7 Kbytes.

Supplementary file Size Download File type/resource
GSM397625.TXT.gz 227.0 Kb (ftp)(http) TXT
Processed data included within Sample table

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