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Accession IconSRP060505

Transcriptome-wide profiling of Spadetail-regulated genes in early somite progenitors

Organism Icon Danio rerio
Sample Icon No Downloadable Samples
Technology Badge IconIllumina HiSeq 2000

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We integrate zebrafish embryology with photoactivatable caged morpholinos (cMO), the photoactivatable lineage tracer caged fluorescein-dextran (cFD), fluorescence-activated cell-sorting (FACS) and RNA sequencing (RNA-seq) to identify Spadetail-regulated genes in mesodermal cells enriched for early somite progenitors. Overall design: 1 to 4-cell stage zebrafish embryos were injected with either cFD alone or in combination with the spt cMO and allowed to develop until 6 hours post-fertilization (hpf). Early ventral somite progenitors were then optically targeted with ultraviolet (360 nm) light using a 100-µm diameter circular diaphragm. Embryos were permitted to develop until 9 hpf, dechorionated, and dissociated into single-cells. Fluorescein-positive cells were then isolated by FACS. Five experimental replicates were performed. Sequencing libraries were then prepared from purified cells according to the CEL-Seq protocol (Hashimshony, T et al. Cell Reports. 2012). In short, total RNA from each sample were individually barcoded and combined prior to sequencing on a HiSeq 2000. Reads were processed and aligned to zebrafish assembly Zv8 using custom CEL-seq scripts within the Galaxy bioinformatics platform. Count files were then analyzed using EdgeR statistical analysis to determine differentially expressed genes.
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