Rho-kinase and myosin II affect dynamic neural crest cell behaviors during epithelial to mesenchymal transition in vivo
The induction and migration of neural crest cells (NCCs) are essential to the development of craniofacial structures and the peripheral nervous system. A critical step in the development of NCCs is the epithelial to mesenchymal transition (EMT) that they undergo in order to initiate migration. Sever...
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Published in | Developmental biology Vol. 324; no. 2; pp. 236 - 244 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
United States
Elsevier Inc
15.12.2008
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Subjects | |
Online Access | Get full text |
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Summary: | The induction and migration of neural crest cells (NCCs) are essential to the development of craniofacial structures and the peripheral nervous system. A critical step in the development of NCCs is the epithelial to mesenchymal transition (EMT) that they undergo in order to initiate migration. Several transcription factors are important for the NCC EMT. However, less is known about the effectors regulating changes in cell adhesion, the cytoskeleton, and cell motility associated with the EMT or about specific changes in the behavior of cells undergoing EMT in vivo. We used time-lapse imaging of NCCs in the zebrafish hindbrain to show that NCCs undergo a stereotypical series of behaviors during EMT. We find that loss of cell adhesion and membrane blebbing precede filopodial extension and the onset of migration. Live imaging of actin dynamics shows that actin localizes differently in blebs and filopodia. Moreover, we find that disruption of myosin II or Rho-kinase (ROCK) activity inhibits NCC blebbing and causes reduced NCC EMT. These data reveal roles for myosin II and ROCK in NCC EMT in vivo, and provide a detailed characterization of NCC behavior during EMT that will form a basis for further mechanistic studies. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Current address: Vesalius Research Center (VRC), Flanders Interuniversity Institute for Biotechnology (VIB), University of Leuven, Campus Gasthuisberg (O&N1), Herestraat 49, 3000 Leuven, Belgium, tobias.langenberg@med.kuleuven.be Current address: Howard Hughes Medical Institute, University of Washington, 815 Mercer St. Room A541, Seattle, WA 98109, jdberndt@u.washington.edu These authors contributed equally |
ISSN: | 0012-1606 1095-564X |
DOI: | 10.1016/j.ydbio.2008.09.013 |