Rho GTPase Dynamics in Cell motility and Cancer Metastasis

Rho GTPases are pivotal regulators of cell shape, adhesion and migration, acting as molecular switches that cycle between inactive GDP-bound and active GTP-bound states. Key family members RhoA, RhoB and RhoC coordinate actin cytoskeletal remodelling, focal adhesion turnover and contractile force generation through downstream effectors such as Rho-associated kinases and formins. Spatial and temporal control of Rho GTPase activation governs protrusion at the leading edge, retraction at the trailing edge and the formation of specialised invasive structures. In cancer, dysregulation of Rho pathways drives enhanced motility, invasion of surrounding stroma and dissemination to distant organs. Distinct isoforms contribute non-redundant functions: RhoA primarily regulates stress fibre formation and cell contractility, RhoC promotes metastatic capacity and plasticity, while RhoB has context-dependent roles in vesicle trafficking and cell survival. Aberrant upstream signals, copy-number changes or altered expression of GEFs and GAPs can shift the balance of Rho activity, facilitating epithelial–mesenchymal transition, invadopodium formation and colonisation of secondary sites. Understanding the intertwined regulation of these GTPases and their effectors reveals promising targets for anti-metastatic therapies and predictive biomarkers of tumour progression.

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Rho GTPase Dynamics in Cell motility and Cancer Metastasis publication trend

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Technical terms

Rho GTPases: Small guanine-binding proteins that act as molecular switches to orchestrate cytoskeletal dynamics and cell movement.

Guanine nucleotide exchange factor (GEF): Protein that activates GTPases by catalysing the exchange of GDP for GTP.

GTPase-activating protein (GAP): Protein that accelerates GTP hydrolysis to inactivate GTPases.

Epithelial–mesenchymal transition (EMT): Biological programme by which stationary epithelial cells acquire motile mesenchymal characteristics.

Actin cytoskeleton: Network of filamentous actin that drives membrane protrusions, adhesion and contractility during cell migration.

References

1. RhoB expression associated with chemotherapy response and prognosis in colorectal cancer. Cancer Cell International (2024).
2. Elevated expression of wildtype RhoC promotes ErbB2- and Pik3ca-induced mammary tumor formation. Breast Cancer Research (2024).
3. Multifaceted Rho GTPase Signaling at the Endomembranes. Frontiers in Cell and Developmental Biology (2019).