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The evolutionarily conserved transcription factor Sp1 controls appendage growth through Notch signaling

AuthorsCórdoba, Sergio ; Requena, David ; Jory, Aurelie; Sáiz, Almudena; Estella, Carlos
Issue Date12-Aug-2016
PublisherCompany of Biologists
CitationDevelopment 143: 3623- 3631 (2016)
AbstractThe appendages of arthropods and vertebrates are not homologous structures, although the underlying genetic mechanisms that pattern them are highly conserved. Members of the Sp family of transcription factors are expressed in the developing limbs and their function is required for limb growth in both insects and chordates. Despite the fundamental and conserved role that these transcription factors play during appendage development, their target genes and the mechanisms by which they participate in control limb growth are mostly unknown. We analyzed here the individual contributions of two Drosophila Sp members, buttonhead (btd) and Sp1, during leg development. We show that Sp1 plays a more prominent role controlling leg growth than does btd We identified a regulatory function of Sp1 in Notch signaling, and performed a genome-wide transcriptome analysis to identify other potential Sp1 target genes contributing to leg growth. Our data suggest a mechanism by which the Sp factors control appendage growth through the Notch signaling.
Identifiersissn: 1477-9129
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