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Publication

H3.3K27M Cooperates with Trp53 Loss and PDGFRA Gain in Mouse Embryonic Neural Progenitor Cells to Induce Invasive High-Grade Gliomas.

Cancer cell | 2017

Gain-of-function mutations in histone 3 (H3) variants are found in a substantial proportion of pediatric high-grade gliomas (pHGG), often in association with TP53 loss and platelet-derived growth factor receptor alpha (PDGFRA) amplification. Here, we describe a somatic mouse model wherein H3.3K27M and Trp53 loss alone are sufficient for neoplastic transformation if introduced in utero. H3.3K27M-driven lesions are clonal, H3K27me3 depleted, Olig2 positive, highly proliferative, and diffusely spreading, thus recapitulating hallmark molecular and histopathological features of pHGG. Addition of wild-type PDGFRA decreases latency and increases tumor invasion, while ATRX knockdown is associated with more circumscribed tumors. H3.3K27M-tumor cells serially engraft in recipient mice, and preliminary drug screening reveals mutation-specific vulnerabilities. Overall, we provide a faithful H3.3K27M-pHGG model which enables insights into oncohistone pathogenesis and investigation of future therapies.

Pubmed ID: 29107533 RIS Download

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Associated grants

Agency: Worldwide Cancer Research, United Kingdom
Id: 13-1083
Agency: NCI NIH HHS, United States
Id: P01 CA196539
Agency: Medical Research Council, United Kingdom
Id: MR/M00094X/1
Agency: CIHR, Canada
Id: MOP 286756
Agency: Medical Research Council, United Kingdom
Id: MC_EX_G0800785

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Bioconductor (tool)

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