Ontology type: schema:ScholarlyArticle Open Access: True
2019-12
AUTHORSEvelyne Lima-Fernandes, Alex Murison, Tiago da Silva Medina, Yadong Wang, Anqi Ma, Cherry Leung, Genna M. Luciani, Jennifer Haynes, Aaron Pollett, Constanze Zeller, Shili Duan, Antonija Kreso, Dalia Barsyte-Lovejoy, Bradly G. Wouters, Jian Jin, Daniel D. De Carvalho, Mathieu Lupien, Cheryl H. Arrowsmith, Catherine A. O’Brien
ABSTRACTIn embryonic stem cells, promoters of key lineage-specific differentiation genes are found in a bivalent state, having both activating H3K4me3 and repressive H3K27me3 histone marks, making them poised for transcription upon loss of H3K27me3. Whether cancer-initiating cells (C-ICs) have similar epigenetic mechanisms that prevent lineage commitment is unknown. Here we show that colorectal C-ICs (CC-ICs) are maintained in a stem-like state through a bivalent epigenetic mechanism. Disruption of the bivalent state through inhibition of the H3K27 methyltransferase EZH2, resulted in decreased self-renewal of patient-derived C-ICs. Epigenomic analyses revealed that the promoter of Indian Hedgehog (IHH), a canonical driver of normal colonocyte differentiation, exists in a bivalent chromatin state. Inhibition of EZH2 resulted in de-repression of IHH, decreased self-renewal, and increased sensitivity to chemotherapy in vivo. Our results reveal an epigenetic block to differentiation in CC-ICs and demonstrate the potential for epigenetic differentiation therapy of a solid tumour through EZH2 inhibition. More... »
PAGES1436
http://scigraph.springernature.com/pub.10.1038/s41467-019-09309-4
DOIhttp://dx.doi.org/10.1038/s41467-019-09309-4
DIMENSIONShttps://app.dimensions.ai/details/publication/pub.1113061419
PUBMEDhttps://www.ncbi.nlm.nih.gov/pubmed/30926792
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