2025-12-16 スイス連邦工科大学ローザンヌ校(EPFL)
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<関連情報>
- https://actu.epfl.ch/news/how-cells-survive-oxidative-stress/
- https://www.nature.com/articles/s41467-025-67304-4
脂質酸素ラジカル防御経路の同定とそのエピジェネティック制御 Identification of a lipid oxygen radical defense pathway and its epigenetic control
Francisco S. Mesquita,Laurence Abrami,Romain Forey,Béatrice Kunz,Charlène Raclot,Lucie Bracq,Filipe Martins,Danica Milovanovic,Evarist Planet,Olga Rosspopoff,Didier Trono & F. Gisou van der Goot
Nature Communications Published:11 December 2025
DOI:https://doi.org/10.1038/s41467-025-67304-4 An unedited version
Abstract
Membrane phospholipids are vulnerable to oxidative radicals, and uncontrolled lipid peroxidation affects cell viability. Cells have evolved quality control and defense mechanisms, of which the genetic regulation is not fully understood. Here, we identify what we have coined the Lipid Oxygen Radical Defense (LORD) pathway. It is epigenetically repressed by a complex comprising the KRAB-zinc finger protein ZNF354A, the scaffold protein KAP1/TRIM28, the histone methyltransferase SETDB1, and the transcriptional activator ATF2. Upon lipid peroxide accumulation, p38- and JNK-dependent phosphorylation of ATF2, KAP1/TRIM28, and ZNF354A leads to disassembly of the repressive complex, releasing ZNF354A from specific DNA loci and activating a network of protective genes, including NRF2 targets. The pathway affects the cellular sensitivity to oxidative stress and ferroptosis, revealing a previously uncharacterized layer of epigenetic control in lipid quality control and damage repair. This positions the LORD pathway as a promising therapeutic target for diseases linked to chronic inflammation, neurodegeneration and cancer.
