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Updated: Jun 5, 2026

Impedance-based Real-time Measurement of Cancer Cell Migration and Invasion
Published on: April 2, 2020
Signalling to cancer cell invasion through PAK family kinases
Andrew Whale1, Fariesha Nur Hashim, Sally Fram
1Randall Division of Cell and Molecular Biophysics, King's College London, London.
Abstract:
Cancer cell metastasis involves a series of changes in cell behaviour, driven by oncogenic transformation, that leads to local tissue invasion, migration through extracellular matrix, entry into the vascular or lymphatic system and colonisation of distant sites. It is well established that the Rho family GTPases Rho, Rac and Cdc42 orchestrate many of the processes required during metastasis. The Rho family GTPases regulate cellular behaviour through their interaction with downstream effector proteins. The p-21 activated kinases (PAKs), effector proteins for Rac and Cdc42, are known to be important regulators of cell migration and invasion. There are six mammalian PAKs which can be divided into two groups: group I PAKs (PAK1-3) and group II PAKs (PAK4-6). Although the two PAK groups are architecturally similar there are differences in their mode of regulation suggesting their cellular functions are likely to be different. This review will focus on the latest evidence relating to the role of PAK family kinases in the cell signalling pathways that drive cancer cell migration and invasion.
Insights
Rho GTPases regulate cancer cell metastasis. This review highlights the role of p-21 activated kinases (PAKs), downstream effectors of Rac and Cdc42, in driving cancer cell migration and invasion.
Area of Science:
- Oncology
- Cell Biology
- Molecular Signaling
Background:
- Cancer cell metastasis is a complex process involving invasion, migration, and colonization.
- Rho family GTPases (Rho, Rac, Cdc42) are key regulators of metastatic processes.
- p-21 activated kinases (PAKs) are downstream effectors of Rac and Cdc42, crucial for cell migration and invasion.
Purpose of the Study:
- To review the latest evidence on the role of PAK family kinases in cancer cell migration and invasion.
- To elucidate the involvement of PAKs in the signaling pathways driving metastasis.
Main Methods:
- Literature review focusing on recent research findings.
- Analysis of the regulatory mechanisms and functions of PAK family kinases (PAK1-6).
Main Results:
- PAKs are critical mediators of cell migration and invasion in cancer.
- Group I (PAK1-3) and Group II (PAK4-6) PAKs exhibit distinct regulatory differences, suggesting diverse cellular functions.
- PAKs integrate signals from Rho GTPases to control cytoskeleton dynamics essential for metastasis.
Conclusions:
- PAK family kinases are pivotal in the signaling networks that promote cancer cell metastasis.
- Targeting PAKs may offer therapeutic strategies to inhibit cancer cell migration and invasion.
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