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ChIP-seq analyses for KDM5A, H3K4me3, RNAPII and TAF3 in human multiple myeloma cell line MM.1S

ABSTRACT: Recent studies have highlighted the oncogenic roles of KDM5A; however, its molecular mechanism has not been fully delineated. Here we identifies KDM5A as a transcriptional activator of MYC target genes in multiple myeloma (MM). Genetic ablation of KDM5A or pharmacologic inhibition of KDM5 by novel inhibitor JQKD82 impairs MM cell growth. Gene expression profile reveals that JQKD82 decreases expression of MYC targets. Expression of MYC targets is similarly downregulated by KDM5A depletion, but little affected by KDM5B knockdown. Mechanistically, KDM5A co-localizes with MYC across the genome, and KDM5A and MYC coordinately promote MYC target gene transcription. The treatment with JQKD82 reduces phosphorylation level of RNA polymerase II (RNAPII), resulting in RNAPII pausing, accompanied by hyper-H3K4me3 status at the MYC loci. Finally, we shows that JQKD82 exerts anti-MM activity and prolongs overall survival in vivo mouse xenograft models. Our results delineate KDM5A function that reinforces MYC transcriptional program, and identify KDM5A as a potential therapeutic target in MM.

ORGANISM(S): Homo sapiens

PROVIDER: GSE148046 | GEO | 2021/03/22

REPOSITORIES: GEO

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RNA-seq analysis after JQKD82 treatment in human multiple myeloma cell line MM.1S

Project description:Recent studies have highlighted the oncogenic roles of KDM5A; however, its molecular mechanism has not been fully delineated. Here we identifies KDM5A as a transcriptional activator of MYC target genes in multiple myeloma (MM). Genetic ablation of KDM5A or pharmacologic inhibition of KDM5 by novel inhibitor JQKD82 impairs MM cell growth. Gene expression profile reveals that JQKD82 decreases expression of MYC targets. Expression of MYC targets is similarly downregulated by KDM5A depletion, but little affected by KDM5B knockdown. Mechanistically, KDM5A co-localizes with MYC across the genome, and KDM5A and MYC coordinately promote MYC target gene transcription. The treatment with JQKD82 reduces phosphorylation level of RNA polymerase II (RNAPII), resulting in RNAPII pausing, accompanied by hyper-H3K4me3 status at the MYC loci. Finally, we shows that JQKD82 exerts anti-MM activity and prolongs overall survival in vivo mouse xenograft models. Our results delineate KDM5A function that reinforces MYC transcriptional program, and identify KDM5A as a potential therapeutic target in MM.

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