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Sample GSM922370 Query DataSets for GSM922370
Status Public on Apr 28, 2012
Title Australian Twin Registry monozygotic twin21a depression white blood cells41
Sample type genomic
 
Channel 1
Source name white blood cells, depression
Organism Homo sapiens
Characteristics cell type: white blood cells
disease status: depression
individual: Australian Twin Registry monozygotic twin21a
twin pair: twin21
Extracted molecule genomic DNA
Extraction protocol The samples were first digested using proteinase K (20mg/ml) and lysis buffer mixture at 55°C overnight. A mixture of phenol, chloroform, and iso-amyl alcohol (in ratios of 25:24:1) was used to remove the proteins, followed by two times chloroform wash, precipitation of DNA using cold isopropanol, and a final wash using 70% ethanol. After the extraction, the DNA samples were suspended in 0.1M Tris-EDTA buffer and were kept in -80°C for storage prior to use. The purity and the concentrations of DNA were checked using a UV spectrophotometer (Nanodrop ND1000).
Label Cy5
Label protocol 1 μg of purified enriched PCR products were fluorescently labelled with Cy3 (Roche) for the reference and with Cy5 (Roche) for the sample, as previously described (Schumacher, A., et al. (2006). Microarray-based DNA methylation profiling: technology and applications. Nucleic acids research 34, 528-542.) .
 
Channel 2
Source name white blood cells, common reference pool
Organism Homo sapiens
Characteristics cell type: white blood cells
sample type: common reference pool
Extracted molecule genomic DNA
Extraction protocol The samples were first digested using proteinase K (20mg/ml) and lysis buffer mixture at 55°C overnight. A mixture of phenol, chloroform, and iso-amyl alcohol (in ratios of 25:24:1) was used to remove the proteins, followed by two times chloroform wash, precipitation of DNA using cold isopropanol, and a final wash using 70% ethanol. After the extraction, the DNA samples were suspended in 0.1M Tris-EDTA buffer and were kept in -80°C for storage prior to use. The purity and the concentrations of DNA were checked using a UV spectrophotometer (Nanodrop ND1000).
Label Cy3
Label protocol 1 μg of purified enriched PCR products were fluorescently labelled with Cy3 (Roche) for the reference and with Cy5 (Roche) for the sample, as previously described (Schumacher, A., et al. (2006). Microarray-based DNA methylation profiling: technology and applications. Nucleic acids research 34, 528-542.) .
 
 
Hybridization protocol The enriched PCR products were hybridized overnight at 48°C onto the 8.1k human CpG island microarray (Microarray Facility, University Health Network, Toronto) as previously described (Schumacher, A., et al. (2006). Microarray-based DNA methylation profiling: technology and applications. Nucleic acids research 34, 528-542.) .
Scan protocol The arrays were scanned using the Genepix 4000B scanner and Genepix Pro 6.0 (Axon Instruments). The automated photomultiplier (PMT) function of the scanner was used to optimize signal intensity and channel balances.
Description Australian Twin Registry monozygotic twin21a vs. common reference pool
Data processing Linear Models for Microarray Data (LIMMA) package (Bioconductor) for R was used for background correction, normalization, and to extract the signal intensities. Briefly, normexp was used for background correction, print-tip loess was used for within-array normalization, and Gquantile was used for between-array normalization.
 
Submission date Apr 25, 2012
Last update date Apr 28, 2012
Contact name Art Petronis
Organization name Centre for Addiction and Mental Health
Department Campbell Family Mental Health Research Institute
Lab Krembil Family Epigenetics Laboratory
Street address 250 College St
City Toronto
State/province Ontario
ZIP/Postal code M5T1R8
Country Canada
 
Platform ID GPL10342
Series (1)
GSE37579 DNA modification study of major depressive disorder: beyond locus-by-locus comparisons.

Data table header descriptions
ID_REF
VALUE normalized M values where M=log2(Cy5/Cy3)

Data table
ID_REF VALUE
UHNhscpg0000001 0.195162655
UHNhscpg0000004 0.040751637
UHNhscpg0000005 -0.140835639
UHNhscpg0000006 0.378658221
UHNhscpg0000007 -0.091730481
UHNhscpg0000008 0.064051613
UHNhscpg0000009 0.51960907
UHNhscpg0000011 0.106295195
UHNhscpg0000012 0.076247796
UHNhscpg0000013 -0.004532394
UHNhscpg0000017 -0.101888079
UHNhscpg0000018 -0.086723063
UHNhscpg0000020 -0.210784319
UHNhscpg0000021 0.298265065
UHNhscpg0000022 0.135929384
UHNhscpg0000025 0.478323378
UHNhscpg0000026 -0.216909016
UHNhscpg0000029 -0.015601284
UHNhscpg0000030 -0.053313683
UHNhscpg0000033 -0.275834893

Total number of rows: 8448

Table truncated, full table size 234 Kbytes.




Supplementary file Size Download File type/resource
GSM922370_AU41.gpr.gz 739.4 Kb (ftp)(http) GPR
Processed data included within Sample table

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