Patterned anchorage to the apical extracellular matrix defines tissue shape in the developing appendages of Drosophila
journal contributionposted on 04.09.2020, 13:24 by Robert P Ray, Alexis Matamoro-Vidal, Paulo S Ribeiro, Nic Tapon, David Houle, Isaac Salazar-Ciudad, Barry J Thompson
How tissues acquire their characteristic shape is a fundamental unresolved question in biology. While genes have been characterized that control local mechanical forces to elongate epithelial tissues, genes controlling global forces in epithelia have yet to be identified. Here, we describe a genetic pathway that shapes appendages in Drosophila by defining the pattern of global tensile forces in the tissue. In the appendages, shape arises from tension generated by cell constriction and localized anchorage of the epithelium to the cuticle via the apical extracellular-matrix protein Dumpy (Dp). Altering Dp expression in the developing wing results in predictable changes in wing shape that can be simulated by a computational model that incorporates only tissue contraction and localized anchorage. Three other wing shape genes, narrow, tapered, and lanceolate, encode components of a pathway that modulates Dp distribution in the wing to refine the global force pattern and thus wing shape.
AnimalsBody PatterningCell AdhesionDrosophila ProteinsDrosophila melanogasterEpitheliumExtracellular MatrixExtracellular Matrix ProteinsGene Expression Regulation, DevelopmentalIon ChannelsProtein Structure, TertiaryRNA InterferenceRNA, Small InterferingSignal TransductionWings, AnimalTaponThompson06 Biological Sciences11 Medical and Health SciencesDevelopmental Biology