NCBI Logo
GEO Logo
   NCBI > GEO > Accession DisplayHelp Not logged in | LoginHelp
GEO help: Mouse over screen elements for information.
          Go
Sample GSM151453 Query DataSets for GSM151453
Status Public on Jul 26, 2007
Title Retina/RPE_goggled_3dayC2
Sample type RNA
 
Source name Gallus gallus retina/RPE
Organism Gallus gallus
Characteristics White Leghorn
Gender not determined
10 days old
Young chicks are extremely difficult to sex from external signs. Post-mortem dissections were not performed. The chicks were purchased unsexed.
Biomaterial provider CBT Farms, Chestertown, MD
Treatment protocol One-day old white Leghorn chicks were housed in brooders with a 12 hr light:dark cycle, using General Electric chroma 50 fluorescent lighting with irradiance of approximately 50μW/cm2 at chick eye level. They received Purina Chick Chow food and water ad libitum. At one week of age and at the onset of the light phase, the chicks were anesthetized with inhalation ether, and a unilateral translucent white plastic goggle was glued to the periorbital feathers to induce ipsilateral form-deprivation myopia, alternating between the left or right eye. After either 6 hrs (n=8) or 3 days (n=8) of goggle wear, the chicks were killed by decapitation. The enucleated eyes were opened at the equator, and the retina/RPE was dissected together from both the goggled and control eyes. The tissues were individually frozen and stored in liquid nitrogen until processed.
Extracted molecule total RNA
Extraction protocol Each frozen retina/RPE sample was ground under liquid nitrogen, using a mortar and pestle. RNA was then isolated from each preparation using Trizol (Invitrogen, Carlsbad, CA) followed by purification and DNase treatment on RNeasy columns (Qiagen,Inc, Valencia, CA). The samples were measured on a NanoDrop ND-1000 UV-Vis spectrophotometer (NanoDrop Technologies, Wilmington, DE) for quantification and purity, with 260/280nm absorbance ratios between 1.8 and 2.1. To evaluate RNA integrity further, an aliquot of each RNA sample was loaded onto an RNA 6000 NanoLab Chip and placed in an Agilent 2100 Bioanalyzer (Agilent Technologies, SantaClara, CA); suitable RNA integrity was established from the electropherograms and gel-images generated by the Bioanalyzer software (data not shown). Aliquots of the RNA samples were stored individually at –80º C.
Label Biotin
Label protocol see manufacturer's website
 
Hybridization protocol see manufacturer's website
Scan protocol see manufacturer's website
Scanner: GeneChip 3000 7G
Description Microarray targets were prepared using total RNA from each eye of six chicks from each of the two experimental groups. All protocols were conducted as described in the Affymetrix GeneChip Expression Analysis Technical Manual (Affymetrix, Inc., Santa Clara, CA). Briefly, 3μg of total RNA from each eye was converted to first-strand cDNA using Superscript II reverse transcriptase primed by a poly(T) oligomer that incorporated the T7 promoter. Second-strand cDNA synthesis was followed by in vitro transcription for linear amplification of each transcript and incorporation of biotinylated CTP and UTP. The cRNA products were fragmented to 200 nucleotides or less, heated at 99ºC for 5 min and hybridized for 16 hrs at 45ºC to one of twenty-four Affymetrix GeneChip Chicken Genome Arras. The microarrays were then washed at low (6X SSPE) and high (100mM MES, 0.1M NaCl) stringency and stained with streptavidin-phycoerythrin. Fluorescence was amplified by adding biotinylated anti-streptavidin and an additional aliquot of streptavidin-phycoerythrin stain. Using a GeneChip 3000 7G scanner, the fluorescence signal (570nm excitation) was recorded at 2.5μm resolution. Data were collected using GCOS software, (v1.4, Affymetrix), and probe level intensities were exported as .cel files for subsequent summarization and analysis.
Data processing Affymetrix .cel (probe intensity) files were exported from GCOS, and processed using Stratagene’s ArrayAssist Lite v3.1 (Stratagene, La Jolla, CA ) to yield .chp files containing Robust Multichip Analysis (RMA) expression values and Affymetrix flags (Present, Absent, Marginal) for each array. The normalized microarray signal intensities were then analyzed by the Significance Analysis of Microarrays approach.(SAM). For the retinas of chicks with 6 hours of unilateral form-deprivation, the SAM analysis indicated few differentially expressed genes; and a 50% false discovery rate was arbitrarily set to yield a list of 112 candidate genes. For the retinas of chicks with 3 days of unilateral form-deprivation, the SAM false discovery rate was set arbitrarily at 14% to yield 296 (i.e., approximately 300) candidate genes.
 
Submission date Dec 14, 2006
Last update date Jul 26, 2007
Contact name Alice M McGlinn
E-mail(s) mcglinn@mail.med.upenn.edu
Phone 215-898-6508
Fax 215-898-0528
Organization name University of Pennsylvania School of Medicine
Department Ophthalmology
Lab Dr Richard Stone
Street address 602D Richards Building 3700 Hamilton Walk
City Philadelphia
State/province PA
ZIP/Postal code 19104-6075
Country USA
 
Platform ID GPL3213
Series (1)
GSE6543 Chick myopia

Data table header descriptions
ID_REF
VALUE 'signal' a measure of the abundance of a transcript
ABS_CALL the call in an absolute analysis that indicates if the transcript was present (P), absent (A), marginal (M)
DETECTION P-VALUE 'detection p-value', p-value that indicates the significance level of the detection call

Data table
ID_REF VALUE ABS_CALL DETECTION P-VALUE
AFFX-BioB-5_at 141.8 P 0.000754
AFFX-BioB-M_at 185.3 P 0.000052
AFFX-BioB-3_at 147.3 P 0.000081
AFFX-BioC-5_at 455.4 P 0.000044
AFFX-BioC-3_at 448.6 P 0.000044
AFFX-BioDn-5_at 1164.4 P 0.000044
AFFX-BioDn-3_at 1922.1 P 0.000052
AFFX-CreX-5_at 5275.1 P 0.000052
AFFX-CreX-3_at 6705.6 P 0.000044
AFFX-DapX-5_at 143.4 P 0.00006
AFFX-DapX-M_at 275.2 P 0.000297
AFFX-DapX-3_at 401.9 P 0.00006
AFFX-LysX-5_at 24.5 P 0.010317
AFFX-LysX-M_at 39 P 0.01667
AFFX-LysX-3_at 51.4 P 0.000169
AFFX-PheX-5_at 23.6 P 0.010317
AFFX-PheX-M_at 32.3 P 0.01667
AFFX-PheX-3_at 38.2 P 0.00141
AFFX-ThrX-5_at 36.8 P 0.023929
AFFX-ThrX-M_at 46.2 P 0.000258

Total number of rows: 38535

Table truncated, full table size 1336 Kbytes.




Supplementary file Size Download File type/resource
GSM151453.CEL.gz 3.5 Mb (ftp)(http) CEL

| NLM | NIH | GEO Help | Disclaimer | Accessibility |
NCBI Home NCBI Search NCBI SiteMap