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Epigenetic Profile in RBPJ Maintains Brain Tumor Initiating Cells through CDK9-mediated Transcriptional Elongation

ABSTRACT: Glioblastomas display hierarchies with self-renewing cancer stem-like cells (CSCs). RNA sequencing and enhancer mapping revealed regulatory programs unique to CSCs causing upregulation of the iron transporter transferrin, the top differentially expressed gene compared to tissue-specific progenitors. Direct interrogation of iron uptake demonstrated CSCs potently extract iron from the microenvironment more effectively than other tumor cells. Systematic interrogation of iron flux determined that CSCs preferentially require transferrin receptor and ferritin - two core iron regulators - to propagate and form tumors in vivo. Depleting ferritin disrupted CSC mitotic progression, through the STAT3-FoxM1 regulatory axis, revealing an iron-regulated CSC pathway. Iron is a unique, primordial metal fundamental for earliest life forms, and on which CSCs have an epigenetically programmed, targetable dependence.

ORGANISM(S): Homo sapiens

PROVIDER: GSE79734 | GEO | 2016/05/01

SECONDARY ACCESSION(S): PRJNA316862

REPOSITORIES: GEO

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