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RhoC and ROCKs regulate cancer cell interactions with endothelial cells
Nicolas Reymond1, Jae Hong Im2, Ritu Garg1
1King's College London, Randall Division of Cell and Molecular Biophysics, New Hunt's, House, Guy's Campus, London SE1 1UL, UK.
Molecular Oncology
|February 14, 2015
Summary
RhoC protein is crucial for cancer cell interaction with blood vessels, a key step in metastasis. Reducing RhoC hinders cancer cell spread and reduces tumor formation, highlighting its role in cancer progression.
Area of Science:
- Oncology
- Cell Biology
- Molecular Biology
Background:
- RhoC, a Rho GTPase, promotes cancer cell invasiveness and progression.
- Cancer cell interaction with vascular endothelial cells (ECs) is vital for metastasis.
Purpose of the Study:
- To investigate the role of RhoC in cancer cell interaction with vascular ECs.
- To determine if RhoC influences cancer cell adhesion, migration, and metastasis in vivo.
Main Methods:
- RNA interference (RNAi) was used to deplete RhoC, ROCK1, and ROCK2 in PC3 prostate cancer cells.
- In vitro assays assessed cancer cell adhesion, intercalation, and transendothelial migration.
- In vivo studies evaluated lung retention and experimental metastasis formation after transient RhoC depletion.
Main Results:
- RhoC depletion significantly reduced PC3 cell adhesion, intercalation, and transendothelial migration.
- Depletion of ROCK1 and ROCK2 mimicked the effects of RhoC depletion on cancer-EC interactions.
- Transient RhoC depletion decreased PC3 cell retention in the lungs and metastasis formation in vivo.
Conclusions:
- RhoC is a critical regulator of cancer cell interactions with vascular ECs.
- Targeting RhoC may represent a therapeutic strategy to inhibit cancer metastasis.
- RhoC's role in facilitating cancer cell extravasation is essential for metastatic progression.
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