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Epigenetic activation of plasmacytoid DC drives IFNAR-dependent therapeutic differentiation of AML

ABSTRACT: Epigenetic activation of plasmacytoid DC drives IFNAR-dependent therapeutic differentiation of AML

PROVIDER: PRJNA813640 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR18268503.fastq.gz	Fastqsanger.gz
	SRR18268504.fastq.gz	Fastqsanger.gz
	SRR18268505.fastq.gz	Fastqsanger.gz
	SRR18268506.fastq.gz	Fastqsanger.gz
	SRR18268507.fastq.gz	Fastqsanger.gz

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Project description:Pharmacological inhibition of epigenetic enzymes can have therapeutic benefit against hematological malignancies. Apart from affecting tumor cell growth and proliferation, these epigenetic agents may mediate anti-tumor immunity. Here we discovered a novel immuno-regulatory mechanism through inhibition of histone deacetylases (HDACs). In models of AML, leukemia cell differentiation and therapeutic benefit mediated by the HDAC inhibitor panobinostat required activation of the type I interferon (IFN) pathway. Plasmacytoid dendritic cells (pDCs) produced type I IFN after panobinostat treatment, through transcriptional activation of IFN genes concomitant with increased H3K27 acetylation at these loci. Depletion of pDCs abrogated panobinostat-mediated activation of type I IFN signaling in leukemia cells and impaired therapeutic efficacy, while combined treatment of panobinostat and IFN improved outcomes in mouse and human models. These discoveries offer a new therapeutic approach for AML and demonstrate that epigenetic rewiring of pDCs enhances anti-tumor immunity, opening the possibility of exploiting this population for immunotherapies. profiling by high throughput sequencing.

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