Abstract
Members of the HDAC family are predictive biomarkers and regulate the tumorigenesis in several cancers. However, the role of these genes in the biology of intracranial ependymomas (EPNs) remains unexplored. Here, an analysis of eighteen HDACs genes in an EPN transcriptomic dataset, revealed significantly higher levels of HDAC4 in supratentorial ZFTA fusion (ST-ZFTA) compared with ST-YAP1 fusion and posterior fossa EPNs, while HDAC7 and SIRT2 were downregulated in ST-ZFTA. HDAC4 was also overexpressed in ST-ZFTA as measured by single-cell RNA-Seq, quantitative real time-polymerase chain reaction, and immunohistochemistry. Survival analyses showed a significantly worse outcome for EPNs with higher HDAC4 and SIRT1 mRNA levels. Ontology enrichment analysis showed an HDAC4-high signature consistent with viral processes while collagen-containing extracellular matrix and cell-cell junction were enriched in those with an HDAC4-low signature. Immune gene analysis demonstrated a correlation between HDAC4 expression and low levels of NK resting cells. Several small molecules compounds targeting HDAC4 and ABCG2, were predicted by in silico analysis to be effective against HDAC4-high ZFTA. Our results provide novel insights into the biology of the HDAC family in intracranial ependymomas and reveal HDAC4 as a prognostic marker and potential therapeutic target in ST-ZFTA.
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Data availability
The datasets used and/or analyzed during the current study are available from the corresponding authors on reasonable request.
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Acknowledgements
We thank Dr. Kristian Pajtler for providing information on the survival clinical data of EPN patients (GSE64415 dataset). We also thank Dr. Maristella B. F. Reis and Dr. Paulo H. S. Klinger for their assistance with the clinical data. Finally, we want to thank and acknowledge patients and families affected by ependymoma for their generous contributions to these studies.
Funding
This study was supported by the São Paulo Research Foundation (FAPESP)- grant no 2014/20341–0, 2018/23372–4/Brazil to G.R.S, 2021/11402–9/Brazil to G.R.S; Brazilian Federal Agency for Support and Evaluation of Graduate Education (CAPES) – Finance Code 001; National Council for Scientific and Technological Development (CNPq), 140140–2019–0. We also had support of FAEPA (Fundação de Amparo ao Ensino, Pesquisa e Assistência do Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto-USP).
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GRS planned and conducted all experiments, in silico analysis, drafted and wrote, and critically reviewed the manuscript. KBS, PSC, and LCV helped with the bench methodology and investigation and critically read the manuscript. LFPN and KAR performed bioinformatics analysis and interpretation. FPS performed the histopathologic analysis. SKNM, SRB, JAY, IAC, and RGPQ provided reagents, data, consultation, and editing of the manuscript. CAS, AMD, NKF, ETV, and LGT provided the consultation review and editing of the manuscript. All authors critically wrote, edited, and reviewed the manuscript.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This research was submitted to and approved by the HC/FMRP-USP Research Ethics Committee (CAAE no 40768820.4.0000.5440).
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de Sousa, G.R., Salomão, K.B., Nagano, L.F.P. et al. Identification of HDAC4 as a potential therapeutic target and prognostic biomarker for ZFTA-fused ependymomas. Cancer Gene Ther 30, 1105–1113 (2023). https://doi.org/10.1038/s41417-023-00616-z
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DOI: https://doi.org/10.1038/s41417-023-00616-z