Membrane Repair Mechanisms in Cancer Cells

Cancer cells encounter frequent mechanical and biochemical challenges that threaten plasma membrane integrity. To survive and proliferate within the hostile tumour microenvironment, these cells exploit a repertoire of rapid repair pathways that reseal disruptions, prevent cytosolic leakage and maintain ionic homeostasis. Central to these responses is the calcium-triggered recruitment of specialised proteins to sites of membrane injury. Annexins sense local rises in Ca2+ and bind to phospholipid surfaces, generating curvature and constriction forces that draw wound edges together. Concurrently, intracellular vesicles are mobilised via exocytosis to supply membrane patches. Ubiquitin-dependent regulators such as TRIM72 oligomerise on phosphatidylserine-rich domains to nucleate vesicle docking and membrane fusion. Dysregulation of these repair systems can influence tumour invasiveness, metastatic potential and resistance to therapy, making membrane repair both a hallmark of cancer cell adaptation and a promising target for intervention.

Research from Nature Portfolio

Recent studies have revealed that annexin family members act as versatile stress sensors and membrane organisers. State-of-the-art structural analyses demonstrate how annexin A4 generates curvature and annexin A6 mediates constriction at wound edges, enabling rapid pore closure. Complementary work has elucidated the detailed architecture of TRIM72, an E3 ubiquitin ligase that assembles on phosphatidylserine-enriched bilayers. High-resolution cryo-electron tomography shows that TRIM72 forms higher-order oligomers, orchestrating vesicle recruitment and ubiquitin signalling to consolidate the repair patch. Together, these insights provide a unified molecular framework for Ca2+-regulated membrane resealing in mechanically stressed cells.

Membrane Repair Mechanisms in Cancer Cells publication trend

The graph below shows the total number of articles in membrane repair mechanisms in cancer cells across all publications each year (not limited to Nature Index journals).

Technical terms

Annexin: Calcium-regulated phospholipid-binding protein that organises membrane curvature and recruits repair factors to wound sites.

TRIM72 (MG53): Tripartite motif E3 ubiquitin ligase that oligomerises on damaged membrane, catalyses ubiquitination and nucleates vesicle docking for repair.

Exocytosis: Process by which intracellular vesicles fuse with the plasma membrane to deliver lipids and proteins essential for resealing.

Ubiquitination: Post-translational modification in which ubiquitin is attached to lysine residues of target proteins, regulating their activity and interactions.

Phosphatidylserine: Anionic phospholipid enriched on the inner leaflet of the plasma membrane; externalises transiently at injury sites to recruit repair complexes.

References

1. Annexins—a family of proteins with distinctive tastes for cell signaling and membrane dynamics. Nature Communications (2024).
2. Annexin A4 and A6 induce membrane curvature and constriction during cell membrane repair. Nature Communications (2017).
3. Structure and activation of the RING E3 ubiquitin ligase TRIM72 on the membrane. Nature Structural & Molecular Biology (2023).
4. Early Endosomes Act as Local Exocytosis Hubs to Repair Endothelial Membrane Damage. Advanced Science (2023).
5. Annexin A2 Heterotetramer: Structure and Function. International Journal of Molecular Sciences (2013).
6. Plasma membrane integrity in health and disease: significance and therapeutic potential. Cell Discovery (2021).