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Updated: Oct 31, 2025

Characterization of Cell Membrane Extensions and Studying Their Roles in Cancer Cell Adhesion Dynamics
Published on: March 26, 2018
Molecular subversion of Cdc42 signalling in cancer
Natasha P Murphy1, Ana Masara Binti Ahmad Mokhtar1,2, Helen R Mott1
1Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, U.K.
Abstract:
Cdc42 is a member of the Rho family of small GTPases and a master regulator of the actin cytoskeleton, controlling cell motility, polarity and cell cycle progression. This small G protein and its regulators have been the subject of many years of fruitful investigation and the advent of functional genomics and proteomics has opened up new avenues of exploration including how it functions at specific locations in the cell. This has coincided with the introduction of new structural techniques with the ability to study small GTPases in the context of the membrane. The role of Cdc42 in cancer is well established but the molecular details of its action are still being uncovered. Here we review alterations found to Cdc42 itself and to key components of the signal transduction pathways it controls in cancer. Given the challenges encountered with targeting small G proteins directly therapeutically, it is arguably the regulators of Cdc42 and the effector signalling pathways downstream of the small G protein which will be the most tractable targets for therapeutic intervention. These will require interrogation in order to fully understand the global signalling contribution of Cdc42, unlock the potential for mapping new signalling axes and ultimately produce inhibitors of Cdc42 driven signalling.
Insights
Cdc42, a key regulator of cell functions, plays a significant role in cancer. Targeting its regulators and downstream pathways offers promising therapeutic strategies for cancer treatment.
Area of Science:
- Cell Biology
- Molecular Oncology
- Biochemistry
Background:
- Cdc42 is a Rho family small GTPase regulating actin cytoskeleton, cell motility, polarity, and cell cycle.
- Its role in cancer is established, but molecular mechanisms require further elucidation.
- Advancements in functional genomics, proteomics, and structural biology enable detailed investigation of Cdc42 localization and function.
Purpose of the Study:
- To review alterations in Cdc42 and its associated signaling pathways in cancer.
- To explore potential therapeutic targets within Cdc42 regulatory networks.
- To understand the global signaling contribution of Cdc42 in cancer progression.
Main Methods:
- Literature review of studies on Cdc42 alterations in cancer.
- Analysis of signaling pathways controlled by Cdc42.
- Evaluation of therapeutic strategies targeting small GTPases and their regulators.
Main Results:
- Alterations in Cdc42 and its key pathway components are observed in various cancers.
- Direct therapeutic targeting of small GTPases presents challenges.
- Cdc42 regulators and downstream effectors show potential as tractable therapeutic targets.
Conclusions:
- Targeting Cdc42 regulators and downstream pathways is a promising therapeutic avenue for cancer.
- Further research is needed to fully understand Cdc42 signaling networks.
- Developing inhibitors for Cdc42-driven signaling holds potential for cancer treatment.
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