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Oncogene-like addiction to aneuploidy in human cancers

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If you have a question about this talk, please contact Estelle Heather Pepper .

Most cancers exhibit aneuploidy, but its functional significance in tumor development is controversial. We have developed ReDACT (Restoring Disomy in Aneuploid cells using CRISPR Targeting), a set of chromosome engineering tools that allow us to eliminate specific aneuploidies from cancer genomes. Using ReDACT, we created a panel of isogenic cells that have or lack common aneuploidies, and we demonstrate that trisomy of chromosome 1q is required for malignant growth in cancers harboring this alteration. Mechanistically, gaining chromosome 1q increases the expression of MDM4 and suppresses TP53 signaling, and we show that TP53 mutations are mutually-exclusive with 1q aneuploidy in human cancers. Thus, specific aneuploidies play essential roles in tumorigenesis, raising the possibility that targeting these “aneuploidy addictions” could represent a novel approach for cancer treatment.

This talk is part of the Seminars on Quantitative Biology @ CRUK Cambridge Institute series.

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