Apical membrane maturation and cellular rosette formation during morphogenesis of the zebrafish lateral line. J Cell Sci 2009 Mar 01;122(Pt 5):687-95
Date
02/12/2009Pubmed ID
19208766Pubmed Central ID
PMC3188803DOI
10.1242/jcs.032102Scopus ID
2-s2.0-65449130159 38 CitationsAbstract
Tissue morphogenesis and cell sorting are major forces during organ development. Here, we characterize the process of tissue morphogenesis within the zebrafish lateral line primordium, a migratory sheet of cells that gives rise to the neuromasts of the posterior lateral line organ. We find that cells within this epithelial tissue constrict actin-rich membranes and enrich apical junction proteins at apical focal points. The coordinated apical membrane constriction in single Delta D-positive hair cell progenitors and in their neighbouring prospective support cells generates cellular rosettes. Live imaging reveals that cellular rosettes subsequently separate from each other and give rise to individual neuromasts. Genetic analysis uncovers an involvement of Lethal giant larvae proteins in the maturation of apical junction belts during cellular rosette formation. Our findings suggest that apical constriction of cell membranes spatially confines regions of strong cell-cell adhesion and restricts the number of tightly interconnected cells into cellular rosettes, which ensures the correct deposition of neuromasts during morphogenesis of the posterior lateral line organ.
Author List
Hava D, Forster U, Matsuda M, Cui S, Link BA, Eichhorst J, Wiesner B, Chitnis A, Abdelilah-Seyfried SAuthor
Brian A. Link PhD Professor in the Cell Biology, Neurobiology and Anatomy department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AnimalsCell Adhesion
Cell Polarity
Cell Shape
Intracellular Signaling Peptides and Proteins
Lateral Line System
Membrane Proteins
Morphogenesis
Protein Kinase C
Receptors, Notch
Signal Transduction
Stem Cells
Zebrafish
Zebrafish Proteins
