title: A novel interaction between hedgehog and Notch promotes proliferation at the anterior-posterior organizer of the Drosophila wing.
abstract: Notch has multiple roles in the development of the Drosophila melanogaster wing imaginal disc. It helps specify the dorsal-ventral compartment border, and it is needed for the wing margin, veins, and sensory organs. Here we present evidence for a new role: stimulating growth in response to Hedgehog. We show that Notch signaling is activated in the cells of the anterior-posterior organizer that produce the region between wing veins 3 and 4, and we describe strong genetic interactions between the gene that encodes the Hedgehog pathway activator Smoothened and the Notch pathway genes Notch, presenilin, and Suppressor of Hairless and the Enhancer of split complex. This work thus reveals a novel collaboration by the Hedgehog and Notch pathways that regulates proliferation in the 3-4 intervein region independently of Decapentaplegic.
authors.affiliation: Department of Biochemistry and Biophysics, University of California, San Francisco, California 94143-2711, USA.
authors.forename: David J
authors.initials: DJ
authors.lastname: Casso
authors.forename: Brian
authors.initials: B
authors.lastname: Biehs
authors.forename: Thomas B
authors.initials: TB
authors.lastname: Kornberg
mesh_terms: D000818:Animals; D049109:Cell Proliferation; D004330:Drosophila / Q000254:growth & development* / Q000378:metabolism*; D018507:Gene Expression Regulation, Developmental; D053823:Hedgehog Proteins / Q000378:metabolism*; D008954:Models, Biological; D010641:Phenotype; D034622:RNA Interference; D051880:Receptors, Notch / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction; D014921:Wings, Animal / Q000166:cytology / Q000254:growth & development / Q000378:metabolism
chemical_list: D053823:Hedgehog Proteins; D051880:Receptors, Notch