Dataset features

Specifications


Application: Gene expression microarray analysis
Number of samples: 32
Release date: Aug 29 2007
Last update date: Jan 18 2013
Access: Public
Chemicals: Ecdysone, Steroids
Genes: VEGFA
Dataset link Genome-wide expression profiling of Drosophila adult heart organogenesis

Experimental Protocol


Total RNAs were prepared from dissected cardiac tubes of Drosophila staged pupae at 8 successive time-points 21, 24, 27, 30, 33, 36, 42 and 48 hours after puparium formation covering adult heart organogenesis. For each time-point sample, 5 cardiac tubes were hand dissected from staged individuals. Four independent biological replicates were analyzed to confer a high reproducibility and statistical significance of the expression data. PolyA+ RNAs were linearly amplified (32 amplifications), labelled (32 with Cy3 and 32 with Cy5), and used for hybridization on Drosophila high-density oligonucleotide (INDAC) dual-channel microarrays (32 arrays) according to a loop-design dedicated to time-course experiments. Given the same number of arrays (8), a simple loop design is more efficient than a reference design: direct comparisons, smallest variance for log ratios, balancing varieties with dye-swapping (including technical replicates) and no reference sample needed (which has no intrinsic interest in our study). A graphical representation of the loop design used on this study is showed in the associated manuscript.

Repositories


GEO

GSE7689

ArrayExpress

E-GEOD-7689

BioProject

PRJNA99445

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Contact


Bruno ZEITOUNI
Sébastien Sénatore

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