ArticleMolecular cell2026
PARP1 suppression drives ROS resistance in aneuploid cancer cells.
Article in Molecular cell, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Melanoma evolution in the lymph node shapes systemic outcomes.bioRxiv : the preprint server for biology · 2026Article
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16 authors.
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Abstract
Aneuploidy is common in cancer and has been implicated in promoting tumor progression, yet the underlying mechanisms remain poorly understood. By generating models of aneuploidy, we found that aneuploidy confers resistance to reactive oxygen species (ROS)-mediated cell death, independent of the specific chromosomes gained or lost. Mechanistically, poly(ADP-ribose) polymerase 1 (PARP1) is suppressed in aneuploid cells, which inhibits PARP1-mediated cell death (parthanatos). We validated aneuploidy-associated PARP1 suppression across 15 cell models and human tumors, with pronounced effects in metastatic tumors. Importantly, PARP1 downregulation promotes tumor metastasis while PARP1 upregulation suppresses it. Through a genome-wide CRISPR screen and functional validation, we identified the transcription factor CCAAT/enhancer-binding protein beta (CEBPB) as a mediator of PARP1 downregulation and ROS resistance in aneuploid cells. Lysosomal dysfunction serves as the upstream activator of CEBPB in aneuploid cells. We propose that aneuploidy-driven CEBPB activation suppresses PARP1, fostering ROS resistance and cancer progression.
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