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Updated: May 28, 2026
09:58
RhoC GTPase Activation Assay
Published on: August 22, 2010
Expression profile of Rho kinases in urinary bladder cancer
D Volanis1, A Zaravinos, T Kadiyska
1Department of Clinical Virology, University of Crete, Heraklion, Crete, Greece.
Summary
RhoB is downregulated in urothelial cell carcinoma (UCC), suggesting a tumor-suppressor role, while other Rho kinases are upregulated, impacting UCC development and progression.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Urothelial cell carcinoma (UCC) is the most common type of bladder cancer.
- Rho GTPases are critical regulators of the actin cytoskeleton, cell migration, and proliferation.
- Dysregulation of Rho GTPase signaling pathways is implicated in various cancers.
Purpose of the Study:
- To investigate the expression of RhoA, RhoB, RhoC, Rac1, and Cdc42 kinases in UCC.
- To determine the expression profile of 107 Rho-associated genes in UCC.
- To correlate Rho kinase expression with clinical outcomes in UCC patients.
Main Methods:
- Expression analysis using microarrays, quantitative PCR (qPCR), and Western blotting.
- Analysis of 77 UCC specimens with paired normal urothelium.
- Computational analysis of Gene Expression Omnibus (GEO) datasets.
Main Results:
- RhoB mRNA and protein levels were significantly decreased in UCC, indicating a tumor-suppressor function.
- RhoA, RhoC, and Cdc42 protein levels were significantly elevated in UCC.
- High Cdc42 mRNA expression correlated with poorer overall survival, while high RhoB mRNA expression correlated with better survival.
Conclusions:
- The majority of Rho-related genes are overexpressed in UCC compared to normal tissue.
- Aberrant expression of RhoA, RhoB, RhoC, Rac1, and Cdc42 is crucial in the initiation and progression of UCC.
- Rho GTPase signaling represents a potential therapeutic target for bladder cancer.
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