title: Planar cell polarity signalling regulates cell adhesion properties in progenitors of the zebrafish laterality organ.
abstract: Organ formation requires the precise assembly of progenitor cells into a functional multicellular structure. Mechanical forces probably participate in this process but how they influence organ morphogenesis is still unclear. Here, we show that Wnt11- and Prickle1a-mediated planar cell polarity (PCP) signalling coordinates the formation of the zebrafish ciliated laterality organ (Kupffer's vesicle) by regulating adhesion properties between organ progenitor cells (the dorsal forerunner cells, DFCs). Combined inhibition of Wnt11 and Prickle1a reduces DFC cell-cell adhesion and impairs their compaction and arrangement during vesicle lumen formation. This leads to the formation of a mis-shapen vesicle with small fragmented lumina and shortened cilia, resulting in severely impaired organ function and, as a consequence, randomised laterality of both molecular and visceral asymmetries. Our results reveal a novel role for PCP-dependent cell adhesion in coordinating the supracellular organisation of progenitor cells during vertebrate laterality organ formation.
authors.affiliation: Anatomy and Developmental Biology Program, Institute of Biomedical Sciences, University of Chile, Santiago, Chile.
authors.forename: Pablo
authors.initials: P
authors.lastname: Oteiza
authors.forename: Mathias
authors.initials: M
authors.lastname: Köppen
authors.forename: Michael
authors.initials: M
authors.lastname: Krieg
authors.forename: Eduardo
authors.initials: E
authors.lastname: Pulgar
authors.forename: Cecilia
authors.initials: C
authors.lastname: Farias
authors.forename: Cristina
authors.initials: C
authors.lastname: Melo
authors.forename: Stephan
authors.initials: S
authors.lastname: Preibisch
authors.forename: Daniel
authors.initials: D
authors.lastname: Müller
authors.forename: Masazumi
authors.initials: M
authors.lastname: Tada
authors.forename: Steffen
authors.initials: S
authors.lastname: Hartel
authors.forename: Carl-Philipp
authors.initials: CP
authors.lastname: Heisenberg
authors.forename: Miguel L
authors.initials: ML
authors.lastname: Concha
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D000818:Animals; D002352:Carrier Proteins / Q000378:metabolism*; D002448:Cell Adhesion / Q000502:physiology*; D016764:Cell Polarity / Q000502:physiology*; D004625:Embryo, Nonmammalian / Q000196:embryology*; D004848:Epithelium / Q000502:physiology; D007091:Image Processing, Computer-Assisted; D007150:Immunohistochemistry; D017403:In Situ Hybridization; D060588:LIM Domain Proteins; D009024:Morphogenesis / Q000502:physiology*; D015398:Signal Transduction / Q000502:physiology*; D051153:Wnt Proteins / Q000378:metabolism*; D015027:Zebrafish / Q000196:embryology*; D029961:Zebrafish Proteins / Q000378:metabolism*
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D002352:Carrier Proteins; D060588:LIM Domain Proteins; C558598:Prickle1a protein, zebrafish; C525392:Prickle1b protein, zebrafish; D051153:Wnt Proteins; C092568:Wnt11 protein, zebrafish; D029961:Zebrafish Proteins