Actin Cytoskeleton Remodeling Accompanied by Redistribution of Adhesion Proteins Drives Migration of Cells in Different EMT States
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View abstract on PubMed
Summary
This summary is machine-generated.Epithelial-mesenchymal transition (EMT) involves cells losing epithelial traits. This study reveals that catenins, particularly alpha-catenin and phosphorylated beta-catenin, play a crucial role in cell migration during EMT.
Area Of Science
- Cell Biology
- Molecular Biology
- Cancer Research
Background
- Epithelial-mesenchymal transition (EMT) is a fundamental biological process where epithelial cells acquire mesenchymal characteristics.
- EMT is crucial for embryonic development and wound healing, but also implicated in cancer progression and metastasis.
- Understanding the molecular mechanisms governing EMT and cell migration is vital for therapeutic interventions.
Purpose Of The Study
- To investigate the role of catenins, specifically alpha-catenin and beta-catenin, in cell migration during different states of EMT.
- To elucidate the localization and interactions of these catenins within migrating cells undergoing EMT.
- To determine the impact of altered catenin expression and phosphorylation on cell morphology and migratory behavior.
Main Methods
- Utilized multiple cell models representing different EMT states, including EGF-induced EMT and cells with varying adherens junction integrity.
- Analyzed cell migratory activity and the subcellular localization of cell-cell adhesion proteins using immunofluorescence microscopy.
- Employed techniques such as suppression of alpha-catenin expression, expression of exogenous alpha-catenin, and co-immunoprecipitation to study protein interactions and functional consequences.
Main Results
- Alpha-catenin accumulated at the leading edges of migrating cells alongside ArpC2/p34 and alpha-actinin.
- Suppression of alpha-catenin resulted in a shift from fibroblast-like to discoid cell morphology and reduced cell migration.
- Exogenous alpha-catenin expression significantly enhanced migration in cells lacking it, while phosphorylated beta-catenin (Y654) localized to integrin adhesion complexes (IACs) and associated with IAC proteins like vinculin and zyxin.
Conclusions
- Catenins not involved in adherens junction assembly can significantly influence cell migration during EMT.
- Alpha-catenin and phosphorylated beta-catenin are key players in regulating cell morphology and migratory capabilities in EMT.
- These findings provide novel insights into the non-canonical roles of catenins in cell motility and metastasis.
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