The super-enhancer landscape reflects molecular subgroups of adrenocortical carcinoma
Gunz, S.; Kerdivel, G.; Meirer, J.; Shapiro, I.; Regazzon, B.; Amrouche, F.; Calmejane, M.-A.; Hamroune, J.; Sigala, S.; Berruti, A.; Bertherat, J.; Assie, G.; Hantel, C.; Boeva, V.
Show abstract
Adrenocortical carcinoma (ACC) is a rare cancer of the adrenal gland with generally very unfavourable outcome. Two molecular subgroups, C1A and C1B, have been previously identified with a significant association with patient survival. In this work, we study chromatin state organization characterized by histone modifications using ChIP-sequencing in adult ACC. We describe the super-enhancer landscape of ACC, characterized by H3K27ac, and identify super-enhancer regulated genes that play a significant role in tumorigenesis. We show that the super-enhancer landscape reflects differences between the molecular sub-groups C1A and C1B and identify networks of master transcription factors mirroring these differences. Additionally, we study the effects of molecules THZ1 and JQ1 previously reported to affect super-enhancer-driven gene expression in ACC cell lines. Our results reveal that the landscape of histone modifications in ACC is linked to its molecular subgroups and thus provide the groundwork for future analysis of epigenetic reprogramming in ACC.
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