Journal
CANCER CELL
Volume 29, Issue 5, Pages 751-766Publisher
CELL PRESS
DOI: 10.1016/j.ccell.2016.04.003
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Funding
- VIB
- Research Foundation Flanders (FWO) fellowship
- ERC [105329 DELCANCER]
- Stichting tegen Kanker [F/2014/257]
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Large-scale heterozygous deletions are a hallmark of cancer genomes. The concomitant loss of multiple genes creates vulnerabilities that are impossible to reveal through the study of individual genes. To delineate the functional outcome of chromosome 8p loss of heterozygosity (LOH), a common aberration in breast cancer, we modeled 8p LOH using TALEN-based genomic engineering. 8p LOH alters fatty acid and ceramide metabolism. The shift in lipid metabolism triggers invasiveness and confers tumor growth under stress conditions due to increased autophagy. The resistance of 8p-deleted cells to chemotherapeutic drugs concurs with poorer survival rates of breast cancer patients harboring an 8p LOH. The autophagy dependency of 8p-deleted cells provides the rational basis for treatment of 8p LOH tumors with autophagy inhibitors.
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