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Solving the chromosome puzzle of aneuploidy in cancer

Published: 1 August 2021

Abstract: Chromosome instability (CIN) and aneuploidy are hallmarks of cancer cells, typically associated with aggressiveness and poor outcomes. Historically, the causative link between aneuploidy and cancer has been difficult to study due to its intrinsic complexity and the poor fitness of aneuploid cells. In this issue of Genes & Development, two companion papers (Trakala and colleagues [pp. 1079–1092] and Shoshani and colleagues [pp. 1093–1108]) exploited sophisticated mouse models to study the progression of aneuploidy from early phases to established tumors. Both groups observed that, while in the early nontumoral cells aneuploidy is characterized by random chromosomal gains, established tumors display a stereotypic karyotype with recurrent gains of only a few chromosomes. Thus, aneuploidy in tumors is not random but shows reproducible patterns of chromosomal changes induced by mechanisms that these two studies are beginning to unveil.
Keywords: chromosomal / poor / colleagues / models / established tumors / aneuploidy in cancer

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