ArticleCancer research communications2025
Histone Deacetylase Inhibitors Target DNA Replication Regulators and Replication Stress in Ewing Sarcoma Cells.
Article in Cancer research communications, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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Who cites it
4 citing papers in PubMed.
- Targeted and molecular therapies in Ewing sarcoma: a comprehensive review of preclinical and clinical advances.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2026Review
- ERCC6 at the Transcription-Replication Interface: Integration of Transcription-Coupled Repair with Replication Stress Responses.International journal of molecular sciences · 2026Review
- DNA replication stress and translational repression converge to drive CDK1- and caspase-dependent apoptosis in Ewing sarcoma.Oncogene · 2026Article
- In Vitro and In Vivo Efficacy of Romidepsin Alone and in Addition to Standard of Care for Treatment of Ewing Sarcoma.Cancers · 2025Article
Corrections and comments
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Authors and funding
9 authors.
Funding
Abstract
Histone deacetylases (HDAC) regulate diverse pathways in cancer cells. Previously, we identified that Ewing sarcoma tumors, which are caused by a translocation between the EWSR1 and FLI1 genes (EWS::FLI1), are sensitive to drugs that target DNA replication, including the RRM1 and RRM2 subunits of ribonucleotide reductase, and the ATR-checkpoint kinase 1 (CHK1)-WEE1 signaling pathway. In this study, we identified that multiple HDAC inhibitors, including fimepinostat, romidepsin, and panobinostat, downregulate the levels of the RRM1, RRM2, CHK1, and WEE1 proteins in Ewing sarcoma cells and impair DNA replication. Moreover, transcriptome analyses identified that HDAC inhibitors downregulate the expression of multiple components of the prereplication complex, including the minichromosome maintenance complex 2-7 (MCM2-7) proteins and CDT1, that are essential for genomic DNA replication. Additionally, proteomic studies identified that HDAC inhibitors also downregulate the level of the BRD4 protein, a BET bromodomain protein that regulates both the transcriptional program of the EWS::FLI1 oncoprotein and DNA replication. Overall, these results provide novel insight into the molecular mechanisms by which HDAC inhibitors target cancer cells, regulate DNA replication, and inhibit the cellular response to DNA replication stress. SIGNIFICANCE: In this work, we identify that HDAC inhibitors broadly disrupt DNA replication and the response to replication stress in Ewing sarcoma cells by downregulating RRM1, RRM2, CHK1, and WEE1. Notably, HDAC inhibitors also reduce MCM2-7 proteins, which are essential for prereplication complex helicase function in replication initiation and elongation, and CDT1, which loads MCM2-7 onto DNA.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.