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KDM4 inhibition disrupts the core regulatory transcriptional circuitry in MYCN-driven neuroblastoma [RNA-seq]

ABSTRACT: A small set of interconnected lineage-specific transcription factors (TFs) form a core regulatory circuitry (CRC) that establishes and maintains cell identity and grants selective dependencies of distinct cancer types. However, effective therapies to targeting CRC TFs remain lacking. Here, we show that the best-in-class KDM4 inhibitor QC6352 has a potent anticancer activity in MYCN-driven high-risk neuroblastoma and significantly represses the CRC TFs including MYCN, HAND2, ASCL1, PHOX2B by disrupting the super-enhancers that dominate the expression of CRC TFs. Furthermore, we have developed a combination therapy by integrating QC6352 into cytotoxic chemotherapy, which leads to a complete response of MYCN amplified tumors and a better animal survival. This study reveals that targeting histone lysine demethylase 4 family may transform into a therapeutic strategy in clinic for cancers driven by CRC TFs.

ORGANISM(S): Homo sapiens

PROVIDER: GSE164455 | GEO | 2024/03/04

REPOSITORIES: GEO

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KDM4 inhibition disrupts the core regulatory transcriptional circuitry in MYCN-driven neuroblastoma [Cut&Tag]

Project description:A small set of interconnected lineage-specific transcription factors (TFs) form a core regulatory circuitry (CRC) that establishes and maintains cell identity and grants selective dependencies of distinct cancer types. However, effective therapies to targeting CRC TFs remain lacking. Here, we show that the best-in-class KDM4 inhibitor QC6352 has a potent anticancer activity in MYCN-driven high-risk neuroblastoma and significantly represses the CRC TFs including MYCN, HAND2, ASCL1, PHOX2B by disrupting the super-enhancers that dominate the expression of CRC TFs. Furthermore, we have developed a combination therapy by integrating QC6352 into cytotoxic chemotherapy, which leads to a complete response of MYCN amplified tumors and a better animal survival. This study reveals that targeting histone lysine demethylase 4 family may transform into a therapeutic strategy in clinic for cancers driven by CRC TFs.

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KDM4 inhibition disrupts the core regulatory transcriptional circuitry in MYCN-driven neuroblastoma [ChIP-seq]

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KDM4 inhibition disrupts the core regulatory transcriptional circuitry in MYCN-driven neuroblastoma [ATAC-seq]

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Understanding the impact of KDM4 inhibition on host cell processes

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Embryonic renal tumor cells sensitive to the small molecule inhibitor QC6352 display depletion of KDM4 levels and disruption of ribosome biogenesis-associated pathways

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Histone lysine demethylase 4 family proteins maintain the transcriptional program and adrenergic cellular state of MYCN-amplified neuroblastoma [RNA-seq]

Project description:Neuroblastoma with MYCN amplification (MNA) is a high-risk disease that requires long-term intensive multimodal therapies. Less than 50% survival rate of high-risk patients has prompted active and extensive studies to seek more effective therapies against MNA neuroblastomas but with few successes. We show that MYCN transdifferentiates the neuroblastoma cells from mesenchymal state to adrenergic state accompanied with induction of histone lysine demethylase 4 family members (KDM4A-C), all of which act in concert to control the expression of MYCN and adrenergic core regulatory transcription factors (CRC TF). Pharmacologic inhibition of KDM4 blocks expression of MYCN and adrenergic CRC transcriptome with genome-wide induction of transcriptionally repressive H3K9me3, resulting in potent anticancer activity against MNA neuroblastomas by inducing differentiation, apoptosis and type I interferon response. KDM4 inhibition in combination with chemotherapy leads to complete tumor response of MNA xenografts, without overt toxicity in animals. Thus, KDM4 blockade may be a transformative strategy to target the dependency of adrenergic CRC TFs in MNA neuroblastomas.

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Histone lysine demethylase 4 family proteins maintain the transcriptional program and adrenergic cellular state of MYCN-amplified neuroblastoma [ATAC-seq]

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2024-03-04 | GSE240504 | GEO

Heterogeneity of neuroblastoma cell identity revealed by transcriptional circuitries

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2017-07-01 | GSE90683 | GEO

KDM4 inhibition targets breast cancer stem cells

Project description:Cancer progression is associated with alterations of epigenetic regulators such as histone-lysine demethylases 4 (KDM4)2-5. During breast cancer therapy, classical treatments fail to address resistant cancer stem cell populations6-10. Here, we identified a novel KDM4 inhibitor (KDM4(i)) with unique preclinical characteristics. KDM4(i) is a highly potent pan KDM4 inhibitor that specifically blocks the demethylase activity of KDM4A, B, C, and D but not that of the other members of the KDM family. We validated the KDM4(i) anti-tumoral properties under conditions recapitulating patient tumors. Therefore, we established a method to isolate and grow triple-negative breast cancer stem cells (BCSCs) from individual patient tumors after neoadjuvant chemotherapy. Limiting dilution orthotopic xenografts of these BCSCs faithfully regenerate original patient tumor histology and gene expression. KDM4(i) blocks proliferation, sphere formation and xenograft tumor growth of BCSCs. Importantly, KDM4(i) abrogates expression of EGFR, a driver of therapy-resistant triple-negative breast tumor cells11, via inhibition of the KDM4A demethylase activity. Taken together, we present a unique BCSC culture system as a basis for therapeutic compound identification and demonstrate that KDM4 inhibition is a new therapeutic strategy for the treatment of triple-negative breast cancer.

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2022-05-01 | GSE158394 | GEO

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