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Defective transcription elongation in a subset of cancers confers immunotherapy resistance

ABSTRACT: Defective transcription elongation in a subset of cancers confers immunotherapy resistance

PROVIDER: PRJNA489885 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7807490_1.fastq.gz	Fastqsanger.gz
	SRR7807490_2.fastq.gz	Fastqsanger.gz
	SRR7807510.fastq.gz	Fastqsanger.gz
	SRR7807520.fastq.gz	Fastqsanger.gz
	SRR7807491_1.fastq.gz	Fastqsanger.gz

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Project description:The nature and the role of global transcriptional deregulations in cancers are not fully understood. We report a phenotype in a significant portion of cancers characterized by widespread defects in mRNA transcription elongation (TE). Cancers with TE defects (TEdeff) were characterized by spurious transcription and defective mRNA processing, specifically in a large set of genes characterized by long genomic length, poised promoters and inducible expression. As such, signaling pathways regulated by such genes, such as interferon/JAK/STAT and TNF/NF-κB pathways, were consistently suppressed in TEdeff tumors. Remarkably, TEdeff significantly correlated with the poor response and outcome in immunotherapy, but not chemo- or targeted therapy, -treated renal cell carcinoma and metastatic melanoma patients in 4 different cohorts. Importantly, forced pharmacologic or genetic induction of TEdeff in tumor cells impaired the expression of the interferon/JAK/STAT and TNF/NF-κB pathways, and imposed resistance to the innate and adaptive anti-tumor immune responses and checkpoint inhibitor therapy in vivo. Therefore, defective TE is a novel epigenetic mechanism in the tumor arsenal of immune resistance tools, which warrants its assessment in cancer patients undergoing immunotherapy.

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