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• W2986089950 abstract "Anthracyclines are a highly effective component of curative breast cancer chemotherapy but are associated with substantial morbidity1,2. Because anthracyclines work in part by inhibiting topoisomerase-II (TOP2) on accessible DNA3,4, we hypothesized that chromatin regulatory genes (CRGs) that mediate DNA accessibility might predict anthracycline response. We studied the role of CRGs in anthracycline sensitivity in breast cancer through integrative analysis of patient and cell line data. We identified a consensus set of 38 CRGs associated with anthracycline response across ten cell line datasets. By evaluating the interaction between expression and treatment in predicting survival in a metacohort of 1006 patients with early-stage breast cancer, we identified 54 CRGs whose expression levels dictate anthracycline benefit across the clinical subgroups; of these CRGs, 12 overlapped with those identified in vitro. CRGs that promote DNA accessibility, including Trithorax complex members, were associated with anthracycline sensitivity when highly expressed, whereas CRGs that reduce accessibility, such as Polycomb complex proteins, were associated with decreased anthracycline sensitivity. We show that KDM4B modulates TOP2 accessibility to chromatin, elucidating a mechanism of TOP2 inhibitor sensitivity. These findings indicate that CRGs mediate anthracycline benefit by altering DNA accessibility, with implications for the stratification of patients with breast cancer and treatment decision making. Epigenetic regulators modulating chromatin accessibility dictate sensitivity to anthracycline-based therapy in early breast cancer and represent potential biomarkers for patient stratification." @default.
• W2986089950 created "2019-11-22" @default.
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• W2986089950 date "2019-11-01" @default.
• W2986089950 modified "2023-10-17" @default.
• W2986089950 title "Chromatin regulators mediate anthracycline sensitivity in breast cancer" @default.
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• W2986089950 doi "https://doi.org/10.1038/s41591-019-0638-5" @default.
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