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Sample GSM599761 Query DataSets for GSM599761
Status Public on Sep 01, 2013
Title carb_ref_96_2
Sample type RNA
 
Channel 1
Source name carbaryl exposed, 96h, r2
Organism Daphnia magna
Characteristics clone: P 32,85
gender: female
treatment: carbaryl exposure
time point: 96h
replicate: 2
Treatment protocol Eighty juveniles per treatment were kept together in 500ml jars at a density of 1 animal/2.5ml medium and exposed to four conditions (two biological replicates per treatment): a control treatment without stress, fish kairomones (Leuciscus idus), carbaryl (5.6µg/l; measured concentration 5.74µg/l) or spores of the parasite Pasteuria ramosa (5x10^6 spores/ml).
Exposures were done every second day starting at day 0. Medium was completely renewed at the moment of a new stress pulse. The two biological samples were collected after 48h, 96h and 144h of exposure. The last pulse was given three hours before freezing the animals for gene expression analysis, respectively, on 45h-, 93h- and 141h-old Daphnia.
Growth protocol P 32,85 clone cultured in standard conditions to avoid maternal effects (see Jansen et al.).
Extracted molecule total RNA
Extraction protocol Total RNA was extracted using Trizol following the manufacturer's protocol.
Label Cy5
Label protocol cDNA collection and sample labelling were done according to Soetaert et al. (2007) and Vandenbrouck et al. (2009). Briefly, total RNA (5µg) together with 2µl mRNA spike from the Lucidea Universal Scorecard (Amersham Biosciences) or from the Spotreport Alien cDNA Array Validation System (Agilent Technologies' Stratagene products) was converted into cDNA using random primers (Invitrogen), a dNTP labelling mix containing aminoallyl-dUTPs and 400U Superscript II reverse transcriptase (Invitrogen). Cy5 and Cy3 (Amersham Biosciences) were covalently coupled to the aminoallyl cDNA samples. After a cleanup reaction (QIAquick PCR purification kit, Qiagen, USA) removing all non-incorporated dyes, the quality of the labelled cDNA was checked spectrophotometrically using the Nanodrop. A total amount of 50 pmol labelled cDNA with a frequency of incorporation between 20 and 50 was vacuum dried to use as probe.
 
Channel 2
Source name reference sample
Organism Daphnia magna
Characteristics clone: P 32,85
gender: female
treatment: reference
Treatment protocol Eighty juveniles per treatment were kept together in 500ml jars at a density of 1 animal/2.5ml medium and exposed to four conditions (two biological replicates per treatment): a control treatment without stress, fish kairomones (Leuciscus idus), carbaryl (5.6µg/l; measured concentration 5.74µg/l) or spores of the parasite Pasteuria ramosa (5x10^6 spores/ml).
Exposures were done every second day starting at day 0. Medium was completely renewed at the moment of a new stress pulse. The two biological samples were collected after 48h, 96h and 144h of exposure. The last pulse was given three hours before freezing the animals for gene expression analysis, respectively, on 45h-, 93h- and 141h-old Daphnia.
Growth protocol P 32,85 clone cultured in standard conditions to avoid maternal effects (see Jansen et al.).
Extracted molecule total RNA
Extraction protocol Total RNA was extracted using Trizol following the manufacturer's protocol.
Label Cy3
Label protocol cDNA collection and sample labelling were done according to Soetaert et al. (2007) and Vandenbrouck et al. (2009). Briefly, total RNA (5µg) together with 2µl mRNA spike from the Lucidea Universal Scorecard (Amersham Biosciences) or from the Spotreport Alien cDNA Array Validation System (Agilent Technologies' Stratagene products) was converted into cDNA using random primers (Invitrogen), a dNTP labelling mix containing aminoallyl-dUTPs and 400U Superscript II reverse transcriptase (Invitrogen). Cy5 and Cy3 (Amersham Biosciences) were covalently coupled to the aminoallyl cDNA samples. After a cleanup reaction (QIAquick PCR purification kit, Qiagen, USA) removing all non-incorporated dyes, the quality of the labelled cDNA was checked spectrophotometrically using the Nanodrop. A total amount of 50 pmol labelled cDNA with a frequency of incorporation between 20 and 50 was vacuum dried to use as probe.
 
 
Hybridization protocol Arrays were hybridized overnight at 42°C. See Vandenbrouck et al. 2009 (PMID 19187980) for more details.
Scan protocol Genepix personal 4100 Scanner and Genepix pro 4.1 software (Axon Instruments).
Description 6_250309(2)
This Sample uses the array with Lucidea controls.
Data processing Statistical analysis was performed using the R package limma (Smyth, 2004). Spots for which red or green FG < BG + 2SD (Sclep et al., 2007) on all arrays were deleted before analysis (FG: median foreground intensity, BG: average local background intensity calculated over the full microarray, SD: standard deviation of local background intensities). Median intensity data were background corrected using a normal-exponential convolution model using the function backgroundCorrect with method 'normexp', offset = 50 (Ritchie et al., 2007). Data were loess-normalized using the function normalizeWithinArrays, method = 'loess' (Smyth & Speed, 2003). Linear models were fitted to intensity ratios, after which probes were ranked in order of evidence of differential expression using an empirical Bayes method (Smyth, 2004). Each stressor was contrasted against the controls. These contrasts were fitted to the linear models and cut off at p < 0.05 and log2FC > 0.75 or log2FC < -0.75 (log2 fold change).
 
Submission date Sep 23, 2010
Last update date Sep 01, 2013
Contact name Mieke Jansen
E-mail(s) Mieke.Jansen@bio.kuleuven.be
Organization name KULeuven
Department Biology
Lab Laboratory of Aquatic Biology and Evolutionary Ecology
Street address Ch. Deberiotstraat 32
City Leuven
ZIP/Postal code 3000
Country Belgium
 
Platform ID GPL10966
Series (1)
GSE24322 Stressor mRNA expression profiling of three different stressors in the water flea Daphnia magna

Data table header descriptions
ID_REF
VALUE Average log2 Lowess-normalized ratio FC (Cy5/Cy3)

Data table
ID_REF VALUE
EBT_DM_CarbU_P14A1 -0.06384348
EBT_DM_CarbU_P14A10 -0.147700293
EBT_DM_CarbU_P14A11 0.132914742
EBT_DM_CarbU_P14A12 -0.240902862
EBT_DM_CarbU_P14A2 -0.677399047
EBT_DM_CarbU_P14A3 0.108828007
EBT_DM_CarbU_P14A4 0.256898994
EBT_DM_CarbU_P14A5 0.037310938
EBT_DM_CarbU_P14A6 0.012218179
EBT_DM_CarbU_P14A7 -0.420619639
EBT_DM_CarbU_P14A8 -0.527264591
EBT_DM_CarbU_P14A9 -0.072382071
EBT_DM_CarbU_P14B1 -0.05987114
EBT_DM_CarbU_P14B10 0.172664477
EBT_DM_CarbU_P14B11 -0.423412727
EBT_DM_CarbU_P14B12 -0.011606432
EBT_DM_CarbU_P14B2 0.109900924
EBT_DM_CarbU_P14B3 0.043880493
EBT_DM_CarbU_P14B4 -0.158800496
EBT_DM_CarbU_P14B5 -0.041214378

Total number of rows: 1918

Table truncated, full table size 55 Kbytes.




Supplementary file Size Download File type/resource
GSM599761.gpr.gz 537.2 Kb (ftp)(http) GPR
Processed data included within Sample table
Processed data are available on Series record

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