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ABSTRACT: Epigenetic reversal of lineage plasticity enhances responsiveness to anti-GD2 therapy in neuroblastoma

PROVIDER: PRJNA746470 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15130521_1.fastq.gz	Fastqsanger.gz
	SRR15130521_2.fastq.gz	Fastqsanger.gz
	SRR15130522_1.fastq.gz	Fastqsanger.gz
	SRR15130522_2.fastq.gz	Fastqsanger.gz
	SRR15130523_1.fastq.gz	Fastqsanger.gz

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Epigenetic reversal of lineage plasticity enhances responsiveness to anti-GD2 therapy in neuroblastoma

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Epigenetic reversal of lineage plasticity enhances responsiveness to anti-GD2 therapy in neuroblastoma [ATAC-seq SK-N-AS]

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Epigenetic reversal of lineage plasticity enhances responsiveness to anti-GD2 therapy in neuroblastoma [RNA-seq SKNBE2 or KPNYN]

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Epigenetic reversal of lineage plasticity enhances responsiveness to anti-GD2 therapy in neuroblastoma [RNA-seq SKNBE2 or KPNYN]

Project description:GD2 is a disialoganglioside that is highly expressed on the surface of neuroblastoma cells. Immunotherapy with anti-GD2 antibodies has revolutionized the treatment of children with high-risk neuroblastoma, but nearly half of patients relapse and little is known about mechanisms of resistance to anti-GD2. Neuroblastomas harbor intrinsic transcriptional plasticity by co-opting divergent lineage-specific developmental programs between adrenergic and mesenchymal cell states. We found that reduced GD2 expression was significantly correlated with the adrenergic cell state in neuroblastoma and that an Adrenergic-to-Mesenchymal Transition (AMT) conferred downregulation of GD2 and resistance to anti-GD2 antibody. Induced reprogramming of adrenergic cells with the master AMT regulator PRRX1 was sufficient to promote transcriptional rewiring in isogenic models and downregulate GD2 expression. Mechanistically, low-GD2 expressing cell lines demonstrate significantly reduced expression of the ganglioside synthesis enzyme ST8SIA1 (GD3 synthase), resulting in a bottlenecking of GD2 synthesis. Primary neuroblastoma tumors enriched for mesenchymal features show demonstrably lower GD3 synthase expression as compared to adrenergic tumors. Pharmacologic inhibition of EZH2 resulted in epigenetic rewiring of mesenchymal neuroblastoma cells and re-expression of ST8SIA1, restoring surface expression of GD2 and sensitivity to an anti-GD2 antibody. These data identify developmental lineage as a key determinant of sensitivity to anti-GD2 based immunotherapies and credential EZH2 inhibitors for clinical testing in combination with anti-GD2 antibody to enhance outcomes for children with neuroblastoma.

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