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Prickle2 regulates apical junction remodeling and tissue fluidity during vertebrate neurulation
Biorxiv : the Preprint Server for Biology
|July 15, 2024
Summary
Prickle2 (Pk2) enhances tissue fluidity by remodeling apical junctions in Xenopus embryos. This process is crucial for neural tube folding and anteroposterior tissue elongation.
Area of Science:
- Developmental Biology
- Cell Biology
- Molecular Biology
Background:
- Neural tube formation requires precise epithelial cell movements.
- Tissue fluidity is essential for epithelial deformation during development.
- The planar cell polarity (PCP) pathway regulates cell polarity and tissue morphogenesis.
Purpose of the Study:
- To investigate the role of Prickle2 (Pk2) in regulating tissue fluidity during neural tube development.
- To elucidate the molecular mechanisms by which Pk2 influences tissue fluidity and cell behavior.
Main Methods:
- Xenopus embryo manipulation (depletion and overexpression).
- Analysis of apical junction dynamics and cell morphology.
- Investigation of signaling pathways, including Rac1 and cadherin dynamics.
Main Results:
- Pk2 increases tissue fluidity by promoting apical junction remodeling in Xenopus embryos.
- Pk2's activity is mediated by its Ser-Thr-rich region (STR) and requires Rac1.
- Pk2 influences cell orientation, promoting anteroposterior elongation.
Conclusions:
- Pk2 is a key regulator of tissue fluidity, essential for neural tube folding.
- Pk2-dependent regulation of tissue fluidity contributes to anteroposterior tissue elongation.
- The findings provide insights into the molecular mechanisms governing embryonic development and tissue morphogenesis.
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