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Updated: May 12, 2026
08:11
Characterization of Cell Membrane Extensions and Studying Their Roles in Cancer Cell Adhesion Dynamics
Published on: March 26, 2018
The RhoGAP protein Deleted in Liver Cancer 3 (DLC3) is essential for adherens junctions integrity
G Holeiter1, A Bischoff, A C Braun
1Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany.
Oncogenesis
|April 5, 2013
Summary
Deleted in Liver Cancer 3 (DLC3) protein loss disrupts epithelial integrity by impairing E-cadherin function and increasing cell migration. DLC3 regulates RhoA signaling at adherens junctions, suggesting its loss contributes to cancer progression.
Area of Science:
- Cell Biology
- Molecular Biology
- Cancer Research
Background:
- Epithelial cell-cell contacts rely on E-cadherin, with Rho GTPases regulating their function.
- Spatial control of Rho GTPase activity at adherens junctions (AJs) is not well understood.
Purpose of the Study:
- To investigate the role of Deleted in Liver Cancer 3 (DLC3) in regulating E-cadherin function and Rho signaling at AJs.
- To determine if DLC3 loss impacts epithelial integrity and contributes to carcinogenesis.
Main Methods:
- Localization studies of DLC3 at AJs in breast epithelial cells.
- Depletion of DLC3 using knockdown techniques.
- Assessment of E-cadherin and catenin localization, cell aggregation, and migration.
- ROCK inhibition to evaluate the role of Rho signaling.
Main Results:
- DLC3 localizes to AJs and is crucial for E-cadherin function.
- DLC3 depletion causes E-cadherin/catenin mislocalization, impaired cell aggregation, and increased migration.
- Aberrant Rho signaling underlies these defects, as ROCK inhibition rescues cell-cell contacts.
Conclusions:
- DLC3 acts as a novel negative regulator of junctional Rho activity.
- Loss of DLC3 compromises epithelial integrity and may contribute to cancer development by disrupting cell-cell adhesion.
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