Metabolic Regulation of Cancer Cell Survival in Extracellular Matrix Detachment

Cancer cells that lose contact with the extracellular matrix (ECM) typically undergo a specialised form of programmed cell death known as anoikis. To metastasise, tumour cells must reprogramme their metabolism to withstand detachment, circulatory shear forces and re-adhesion at distant sites. Key adaptations include shifts between glycolysis and oxidative phosphorylation, enhanced antioxidant defences to neutralise reactive oxygen species (ROS), and selective utilisation of substrates such as glutamine and fatty acids. These metabolic rewiring events are orchestrated by central energy sensors and stress-responsive kinases, notably AMP-activated protein kinase (AMPK) and mechanistic target of rapamycin (mTOR), and by transcriptional regulators that govern redox homeostasis and substrate transport. Together, these pathways permit ECM-detached cells to maintain ATP levels, limit oxidative damage and suppress apoptotic signalling, thus facilitating survival in suspension and promoting metastatic colonisation. Understanding these mechanisms has profound implications for the development of therapies that selectively target the vulnerabilities of detached cancer cells, with the aim of preventing metastatic dissemination.

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Metabolic Regulation of Cancer Cell Survival in Extracellular Matrix Detachment publication trend

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Technical terms

Anoikis: Apoptotic cell death triggered by loss of adhesion to the extracellular matrix.

Extracellular matrix (ECM): A network of proteins and polysaccharides providing structural support and signalling cues to cells.

Reactive oxygen species (ROS): Highly reactive by-products of oxygen metabolism that can damage cellular components if not neutralised.

Oxidative phosphorylation (OXPHOS): Mitochondrial process that generates ATP through electron transport and chemiosmotic coupling.

Glycolysis: Cytosolic pathway that converts glucose to pyruvate, producing ATP and intermediates for biosynthesis.

References

1. The critical role of glutamine and fatty acids in the metabolic reprogramming of anoikis-resistant melanoma cells. Frontiers in Pharmacology (2024).
2. Cell Clustering Promotes a Metabolic Switch that Supports Metastatic Colonization. Cell Metabolism (2019).
3. Mechanisms of redox metabolism and cancer cell survival during extracellular matrix detachment. Journal of Biological Chemistry (2018).