One of the central issues in evolutionary developmental biology is how we can formulate the relationships between evolutionary and developmental processes. Two major models have been proposed: the 'funnel-like' model, in which the earliest embryo shows the most conserved morphological pattern, followed by diversifying later stages, and the 'hourglass' model, in which constraints are imposed to conserve organogenesis stages, which is called the phylotypic period. Here we perform a quantitative comparative transcriptome analysis of several model vertebrate embryos and show that the pharyngula stage is most conserved, whereas earlier and later stages are rather divergent. These results allow us to predict approximate developmental timetables between different species, and indicate that pharyngula embryos have the most conserved gene expression profiles, which may be the source of the basic body plan of vertebrates.
Comparative transcriptome analysis reveals vertebrate phylotypic period during organogenesis.
Sex, Specimen part, Disease, Disease stage
View SamplesTranscription profiling of X.laevis development.
Comparative transcriptome analysis reveals vertebrate phylotypic period during organogenesis.
Sex, Specimen part
View SamplesTranscription profiling of chicken development
Comparative transcriptome analysis reveals vertebrate phylotypic period during organogenesis.
Sex, Specimen part
View SamplesTranscription profiling of mouse development
Comparative transcriptome analysis reveals vertebrate phylotypic period during organogenesis.
Sex, Specimen part, Disease, Disease stage
View SamplesTo identify factors involved in glioma-initiating cells (GICs), we compared gene expressions between GIC-like cells and non-GICs.
Combination of a ptgs2 inhibitor and an epidermal growth factor receptor-signaling inhibitor prevents tumorigenesis of oligodendrocyte lineage-derived glioma-initiating cells.
Specimen part
View SamplesExpression profiling of two-weeks-old wild type, nar1-4/- and nbp35-3/- mutant seedlings. The cytosolic Fe -S cluster assembly pathway is involved in cytosolic and nucleus Fe-S protein maturation.
The role of Arabidopsis thaliana NAR1, a cytosolic iron-sulfur cluster assembly component, in gametophytic gene expression and oxidative stress responses in vegetative tissue.
Age, Specimen part
View SamplesTo identify factors involved in glioma-initiating cells (GICs), we compared gene expression between GIC-like cells and non-GICs.
Sox11 prevents tumorigenesis of glioma-initiating cells by inducing neuronal differentiation.
Specimen part
View SamplesTo identify factors involved in tumorigenicity of glioma-initiating cells (GICs), we compared gene expression in GIC-like cells with and without sox11 expression.
Sox11 prevents tumorigenesis of glioma-initiating cells by inducing neuronal differentiation.
Specimen part, Cell line
View SamplesDrosophila imaginal disc cells exhibit a remarkable ability to switch cell fates under various perturbations, a phenomenon known as transdetermination (TD). The winged eye (wge) gene induces eye-to-wing TD by its overexpression in eye imaginal discs using eye specific Gal4 driver (eyeless-Gal4). Gene network controlling this process, however, is largely unclear. Additionally, we identified that heterochromatin-related histone methyltransferase Su(var)3-9 is essential for wge-mediated TD.
winged eye Induces Transdetermination of Drosophila Imaginal Disc by Acting in Concert with a Histone Methyltransferase, Su(var)3-9.
Specimen part
View SamplesThe publicly available genome sequence information of two rice strains, japonica cultivar Nipponbare and indica cultivar 93-11, opens a great opportunity for investigation of performances DNA genotyping by high-density oligonucleotide arrays. Here, we compare single feature polymorphism (SFP) detection performances between whole genome hybridization and transcript hybridization using Affymetrix Rice Expression Array and the two rice cultivars.
A simple optimization can improve the performance of single feature polymorphism detection by Affymetrix expression arrays.
Specimen part
View Samples