Journal
SCIENCE
Volume 320, Issue 5881, Pages 1349-1352Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1158170
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Funding
- PHS HHS [18B-106681] Funding Source: Medline
- Direct For Biological Sciences [0745322] Funding Source: National Science Foundation
- Division Of Integrative Organismal Systems [0745322] Funding Source: National Science Foundation
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Gene regulatory networks direct the progressive determination of cell fate during embryogenesis, but how they control cell behavior during morphogenesis remains largely elusive. Cell sorting, microarrays, and targeted molecular manipulations were used to analyze cardiac cell migration in the ascidian Ciona intestinalis. The heart network regulates genes involved in most cellular activities required for migration, including adhesion, cell polarity, and membrane protrusions. We demonstrated that fibroblast growth factor signaling and the forkhead transcription factor FoxF directly upregulate the small guanosine triphosphatase RhoDF, which synergizes with Cdc42 to contribute to the protrusive activity of migrating cells. Moreover, RhoDF induces membrane protrusions independently of other cellular activities required for migration. We propose that transcription regulation of specific effector genes determines the coordinated deployment of discrete cellular modules underlying migration.
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