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Dynamic Chromatin Alteration Induces Oncogenic Hijacking by Essential Transcriptional Factors during Medulloblastoma Tumorigenesis [Multiome]

GSE243609 Mus musculus Expression profiling by high throughput sequencing; Genome binding/occupancy profiling by high throughput sequencing 6 samples Submitted 2024/05/03 Platform GPL21626
Summary
Using ATAC-seq analysis from GNPs to MBSHH we discovered a massive modification in chromatin accessibility during MBSHH formation. Next, using integrative bioinformatics, we identified genes of the nuclear factor I (NFI) family that function as oncogenes on the MBSHH epigenome. We demonstrate not only that these genes are essential in the early stages of murine MBSHHs tumorigenesis, but also that their genetic silencing inhibits tumor growth in murine and human MBSHHs in vitro and in vivo. Finally, we discovered that NFIA/B are post-translationally modified by an activating methylation in MBSHH, making it possibility to target this pathway. Further studies revealed that pharmacological inhibition of this methylated NFIA/B hindered tumor proliferation, demonstrating the requirement of NFIA/B for tumor progression. Collectively our data shed light on the mechanism underlying the epigenome during the formation of the most malignant pediatric brain tumor and emphasizes the importance of deciphering cancer-specific epigenome for identification of new therapeutic avenues.
Published in
Cancer-specific epigenome identifies oncogenic hijacking by nuclear factor I family proteins for medulloblastoma progression
Shiraishi R, Cancila G, Kumegawa K et al. · Developmental cell 2024 · PMID 38834071 · doi:10.1016/j.devcel.2024.05.013
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Also filed as BioProject PRJNA1019231 and SRA study SRP461908. Searching any of these in the dataset finder brings you back here.

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