The histone demethylase KDM5C functions as a tumor suppressor in AML by repression of bivalently marked immature genes

Mette Louise Trempenau, Mikkel Bruhn Schuster, Sachin Pundhir, Mafalda Araujo Pereira, Adrija Kalvisa, Marta Tapia, Jinyu Su, Ying Ge, Bauke de Boer, Alexander Balhuizen, Frederik Otzen Bagger, Pavel Shliaha, Patrycja Sroczynska, Julian Walfridsson, Kirsten Grønbæk, Kim Theilgaard-Mönch, Ole N Jensen, Kristian Helin, Bo T Porse*

*Corresponding author af dette arbejde
4 Citationer (Scopus)

Abstract

Epigenetic regulators are frequently mutated in hematological malignancies including acute myeloid leukemia (AML). Thus, the identification and characterization of novel epigenetic drivers affecting AML biology holds potential to improve our basic understanding of AML and to uncover novel options for therapeutic intervention. To identify novel tumor suppressive epigenetic regulators in AML, we performed an in vivo short hairpin RNA (shRNA) screen in the context of CEBPA mutant AML. This identified the Histone 3 Lysine 4 (H3K4) demethylase KDM5C as a tumor suppressor, and we show that reduced Kdm5c/KDM5C expression results in accelerated growth both in human and murine AML cell lines, as well as in vivo in Cebpa mutant and inv(16) AML mouse models. Mechanistically, we show that KDM5C act as a transcriptional repressor through its demethylase activity at promoters. Specifically, KDM5C knockdown results in globally increased H3K4me3 levels associated with up-regulation of bivalently marked immature genes. This is accompanied by a de-differentiation phenotype that could be reversed by modulating levels of several direct and indirect downstream mediators. Finally, the association of KDM5C levels with long-term disease-free survival of female AML patients emphasizes the clinical relevance of our findings and identifies KDM5C as a novel female-biased tumor suppressor in AML.

OriginalsprogEngelsk
TidsskriftLeukemia
Vol/bind37
Udgave nummer3
Sider (fra-til)593-605
Antal sider13
ISSN0887-6924
DOI
StatusUdgivet - mar. 2023

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