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Homo sapiens

ABSTRACT: Epigenetic Profile in Transcription elongation factors are in vivo-specific cancer dependencies in glioma

PROVIDER: PRJNA300650 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR2876074.fastq.gz	Fastqsanger.gz
	SRR2876075.fastq.gz	Fastqsanger.gz
	SRR2876076.fastq.gz	Fastqsanger.gz
	SRR2876077.fastq.gz	Fastqsanger.gz
	SRR2876078.fastq.gz	Fastqsanger.gz

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Transcription elongation factors are in vivo-specific cancer dependencies in glioma

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Project description:Glioblastoma ranks as one of the most lethal human cancers, with no effective therapies. To discover novel therapeutic targets, here we performed parallel in vivo and in vitro RNA interference screens of epigenetic regulators and show that transcription elongation factors are essential for human glioblastoma cell survival in vivo, but not in vitro. Context-specific dependency in vivo is driven by microenvironment-induced global changes in the cancer epigenome. JMJD6, a top in vivo-specific hit, binds at enhancers and correlates with increased transcription of known pause-controlled genes. JMJD6 knockdown in patient-derived glioblastoma cells enhances survival of mice bearing orthotopic tumors. Moreover, elevated levels of JMJD6 alone, as well as transcription elongation factors collectively, informs tumor grade and predicts poor prognosis for patients. Our work provides a rationale for targeting transcription elongation as a therapeutic strategy in glioblastoma and, more broadly, the power of in vivo phenotypic screening to identify therapeutically relevant targets in cancer.

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Sox9 directs divergent epigenomic states in brain tumor subtypes

Project description:Epigenetic dysregulation is a universal feature of cancer that results in altered patterns of gene expression that drive malignancy. Brain tumors exhibit subtype-specific epigenetic alterations, however the molecular mechanisms responsible for these diverse epigenetic states remain unclear. Here we show that the developmental transcription factor Sox9 differentially regulates epigenomic states in high-grade glioma (HGG) and ependymoma (EPN). These contrasting roles for Sox9 correspond with protein interactions with histone deacetylating complexes in HGG, and association with the Rela oncofusion in EPN. Together, our studies demonstrate how epigenomic states are differentially regulated in distinct subtypes of brain tumors, while revealing divergent roles for Sox9 in HGG and EPN tumorigenesis.

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