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Gene expression time course analysis during apical and basal regeneration in Hydra

ABSTRACT: After section, Hydra regenerate each missing part within 2 to 3 days. This study was designed to allow tracking of gene expression levels during apical and basal regeneration and to compare these different regenerative contexts systematically. We determine that transient early genetic events are generic, i.e. that modulations in gene expression have analogous directions, magnitudes and durations whatever the level along the central body column and orientation of the amputation plane. In turn, early modulated transcripts with sustained expression patterns during regeneration are generally distinct during apical and basal regeneration. Genes that were previously shown to be instrumental in defining the apical organizer (Wnt signalling pathway) are among the first genes to be expressed in the condition where Hydra regenerates its apical part, Wnt3 is actually the only detected transcript encoding a signalling protein already upregulated by 2h. Regarding basal regeneration, we identify a number of transcripts with sustained expression patterns already established by 4h, some of them encoding evolutionary conserved signalling proteins, which are almost exclusively consisting of agonists and antagonists of the BMP signalling pathway. The processed data deposited here are also accessible in a graphical manner from a blast-based web interface available at https://hydratlas.unige.ch

ORGANISM(S): Hydra vulgaris

PROVIDER: GSE111531 | GEO | 2019/03/01

REPOSITORIES: GEO

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