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Updated: Jul 31, 2025

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RhoA GEF Mcf2lb regulates rosette integrity during collective cell migration
Hannah M Olson1,2, Amanda Maxfield1, Nicholas L Calistri3,4
1Department of Cell, Developmental & Cancer Biology, Oregon Health & Science University, The Knight Cancer Institute, Portland, Oregon, USA.
The RhoA GEF Mcf2lb protein is crucial for maintaining rosette integrity during zebrafish development. Loss of Mcf2lb disrupts cell apical constriction, leading to excess sensory organ formation.
Area of Science:
- Developmental Biology
- Cell Biology
- Genetics
Background:
- Multicellular rosettes are transient epithelial structures vital for organogenesis.
- Apical constriction of cells is a defining feature of rosette formation.
- Understanding rosette development mechanisms is critical for developmental biology.
Conclusions:
- Mcf2lb acts as a key regulator of rosette integrity by activating RhoA signaling.
- RhoA activation by Mcf2lb is essential for inducing and maintaining apical constriction.
- Disrupted Mcf2lb function leads to developmental defects in the zebrafish posterior lateral line system.
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