January 13, 2017
Seeking to better understand the link between abnormal chromosome number and tumor formation, Amon Lab researcher Jason Sheltzer (now a Fellow at Cold Spring Harbor Laboratories) worked with KI colleagues to investigate the tumorigenic potential of cells engineered to contain an extra chromosome. While aneuploidy (when a cell has too many or too few chromosomes) is a common feature of cancer, its role in tumor initiation and progression is unclear. In this study, the researchers found that not-yet-malignant cells with a single added chromosome could, surprisingly, suppress tumor growth and better withstand a variety of oncogenic mutations. Sometimes, however, cells adapted to the aneuploidy giving rise to fast-growing descendants that acquired additional aneuploidies or returned to the normal diploid state. These results, published in Cancer Cell, suggest that aneuploidy may have both tumor-protective and tumor-promoting effects on the development of cancer. This work was supported in part by the Kathy and the Curt Marble Cancer Research Fund. Read more here and here.