title: vrille is required to ensure tracheal integrity in Drosophila embryo.
abstract: The Drosophila bZIP transcription factor Vrille (VRI) is required for growth, circadian clock regulation and metamorphosis. We identified here a new facet of vrille (vri) function and show that it is required for tracheal development. We show that, in the embryo, VRI is expressed in a complex and dynamic pattern and is found in amnioserosa, subdomains of the developing gut and in trachea cells. We also show that, as expected, the protein is nuclear. We then asked whether VRI was involved in morphogenetic processes such as gut and tracheal development. We therefore investigated the development of these tissues in vri mutants, and although we did not observe any defects in gut morphology, we identified differentiation defects that affect tracheal integrity. Most of the defects were observed after stage 14 and affect all branches, resulting in branch breaks, abnormal branching and elongation.
authors.affiliation: Institut Jacques Monod, CNRS-Université Paris Diderot, Paris, France.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Szuplewski
authors.forename: Ingrid
authors.initials: I
authors.lastname: Fraisse-Véron
authors.forename: Hélène
authors.initials: H
authors.lastname: George
authors.forename: Régine
authors.initials: R
authors.lastname: Terracol
mesh_terms: D000818:Animals; D004330:Drosophila / Q000196:embryology / Q000378:metabolism; D029721:Drosophila Proteins / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D005753:Gastric Mucosa / Q000378:metabolism; D007150:Immunohistochemistry; D009687:Nuclear Proteins / Q000276:immunology / Q000378:metabolism; D013270:Stomach / Q000196:embryology / Q000276:immunology; D014132:Trachea / Q000196:embryology* / Q000276:immunology / Q000378:metabolism; D014157:Transcription Factors / Q000235:genetics* / Q000276:immunology / Q000378:metabolism
chemical_list: D029721:Drosophila Proteins; D009687:Nuclear Proteins; D014157:Transcription Factors; C108498:vri protein, Drosophila