title: Myosin II regulates complex cellular arrangement and epithelial architecture in Drosophila.
abstract: Remodeling epithelia is a primary driver of morphogenesis. Here, we report a central role of myosin II in regulating several aspects of complex epithelial architecture in the Drosophila eye imaginal disc. The epithelial indentation of the morphogenetic furrow is established from a pattern of myosin II activation defined by the developmental signals Hedgehog and Decapentaplegic. More generally, patterned myosin activation can control diverse three-dimensional epithelial sculpting. We have developed a technique to image eye disc development in real time, and we show that myosin II also regulates higher-order organization of cells in the plane of the epithelium. This includes the clustering of cells into ommatidial units and their subsequent coordinated rotation. This later clustering function of myosin II depends on EGF receptor signaling. Our work implies that regulation of the actomyosin cytoskeleton can control morphogenesis by regulating both individual cell shapes and their complex two-dimensional arrangement within epithelia.
authors.affiliation: MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, United Kingdom.
authors.forename: Luis M
authors.initials: LM
authors.lastname: Escudero
authors.affiliation: MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, United Kingdom.
authors.forename: Marcus
authors.initials: M
authors.lastname: Bischoff
authors.affiliation: MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, United Kingdom. Electronic address: mf1@mrc-lmb.cam.ac.uk.
authors.forename: Matthew
authors.initials: M
authors.lastname: Freeman
mesh_terms: D000818:Animals; D019521:Body Patterning; D054910:Compound Eye, Arthropod / Q000254:growth & development / Q000378:metabolism*; D003599:Cytoskeleton / Q000502:physiology; D004330:Drosophila / Q000254:growth & development / Q000502:physiology*; D029721:Drosophila Proteins / Q000502:physiology*; D004848:Epithelium / Q000254:growth & development / Q000502:physiology; D007814:Larva; D009024:Morphogenesis; D024462:Myosin Type II / Q000502:physiology*; D015398:Signal Transduction
chemical_list: D029721:Drosophila Proteins; D024462:Myosin Type II