title: Snoo and Dpp Act as Spatial and Temporal Regulators Respectively of Adult Progenitor Cells in the Drosophila Trachea.
abstract: Clusters of differentiated cells contributing to organ structures retain the potential to re-enter the cell cycle and replace cells lost during development or upon damage. To do so, they must be designated spatially and respond to proper activation cues. Here we show that in the case of Drosophila differentiated larval tracheal cells, progenitor potential is conferred by the spatially restricted activity of the Snoo transcription cofactor. Furthermore, Dpp signalling regulated by endocrine hormonal cues provides the temporal trigger for their activation. Finally, we elucidate the genetic network elicited by Snoo and Dpp activity. These results illustrate a regulatory mechanism that translates intrinsic potential and extrinsic cues into the facultative stem cell features of differentiated progenitors.
authors.affiliation: Institut de Biologia Molecular de Barcelona (CSIC), Barcelona, Catalonia, Spain.|Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Catalonia, Spain.
authors.forename: Nareg J-V
authors.initials: NJ
authors.lastname: Djabrayan
authors.affiliation: Institut de Biologia Molecular de Barcelona (CSIC), Barcelona, Catalonia, Spain.|Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Catalonia, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Casanova
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000235:genetics*; D029721:Drosophila Proteins / Q000096:biosynthesis / Q000235:genetics*; D004331:Drosophila melanogaster / Q000235:genetics / Q000254:growth & development; D018507:Gene Expression Regulation, Developmental; D053263:Gene Regulatory Networks; D007814:Larva / Q000235:genetics / Q000254:growth & development; D009687:Nuclear Proteins / Q000096:biosynthesis / Q000235:genetics*; D013234:Stem Cells / Q000166:cytology* / Q000378:metabolism; D014132:Trachea / Q000166:cytology / Q000254:growth & development; D014157:Transcription Factors / Q000096:biosynthesis / Q000235:genetics*
chemical_list: D029721:Drosophila Proteins; D009687:Nuclear Proteins; D014157:Transcription Factors; C064196:dpp protein, Drosophila; C106204:sno protein, Drosophila