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Oncohistone H3.3K27M-driven CREB5/ID1 Axis Mediates the Malignant Cell States of Diffuse Intrinsic Pontine Glioma (DIPG) [CUT&Tag]

ABSTRACT: Oncohistone H3.3K27M-driven CREB5/ID1 Axis Mediates the Malignant Cell States of Diffuse Intrinsic Pontine Glioma (DIPG) [CUT&Tag]

PROVIDER: PRJNA1054111 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27272410_1.fastq.gz	Fastqsanger.gz
	SRR27272410_2.fastq.gz	Fastqsanger.gz
	SRR27272411_1.fastq.gz	Fastqsanger.gz
	SRR27272411_2.fastq.gz	Fastqsanger.gz
	SRR27272412_1.fastq.gz	Fastqsanger.gz

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Oncohistone H3.3K27M-driven CREB5/ID1 Axis Mediates the Malignant Cell States of Diffuse Intrinsic Pontine Glioma (DIPG) [HiC]

Project description:Diffuse intrinsic pontine glioma (DIPG), an exceptionally lethal pediatric cancer with limited treatment options, is characterized by relentless proliferation and differentiation arrest, primarily influenced by H3K27M oncohistones. This study unveils that ID1 activation occurs independently of BMP signaling in H3.3K27M/ACVR1WT DIPG subtype. ID1 inhibition promotes cell differentiation and apoptosis in DIPG. Additionally, we discover the intricate regulation of ID1 tied to the lineage-specific transcription factor CREB5—an oncogenic contributor hindering differentiation in the H3.3K27M subtype of DIPG. The SWI/SNF complex is identified as a co-regulator of CREB5, further promoting tumorigenesis. Intriguingly, H3.3K27M oncohistones act as a trigger for CREB5 overexpression, facilitating the formation of super-enhancer promoter loops. Moreover, our research highlights the potent anti-tumor effect of ABBV-075 in treating DIPG. In essence, this study elucidates the oncohistone-driven H3.3K27M/CREB5/ID1 axis, providing insights into the malignant cellular state within a DIPG subtype and offering potential therapeutic avenues for this devastating pediatric cancer.

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Human diffuse intrinsic pontine glioma (DIPG) LC-MSMS

Project description:Diffuse intrinsic pontine glioma (DIPG), a lethal pediatric cancer driven by H3K27M oncohistones, exhibits aberrant epigenetic regulation and stem-like cell states. Here, we uncover an axis involving H3.3K27M oncohistones, CREB5/ID1, which sustains the stem-like state of DIPG cells, promoting malignancy. We demonstrate that CREB5 mediates elevated ID1 levels in the H3.3K27M/ACVR1WT subtype, promoting tumor growth; while BMP signaling regulates this process in the H3.1K27M/ACVR1MUT subtype. Furthermore, we reveal that H3.3K27M directly enhances CREB5 expression by reshaping the H3K27me3 landscape at the CREB5 locus, particularly at super-enhancer regions. Additionally, we elucidate the collaboration between CREB5 and BRG1, the SWI/SNF chromatin remodeling complex catalytic subunit, in driving oncogenic transcriptional changes in H3.3K27M DIPG. Intriguingly, disrupting CREB5 super-enhancers with ABBV-075 significantly reduces its expression and inhibits H3.3K27M DIPG tumor growth. Combined treatment with ABBV-075 and a BRG1 inhibitor presents a promising therapeutic strategy for clinical translation in H3.3K27M DIPG treatment.

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