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Open Access 01-12-2022 | Leukemia | Review

Targeting the histone H3 lysine 79 methyltransferase DOT1L in MLL-rearranged leukemias

Authors: Yan Yi, Shenglei Ge

Published in: Journal of Hematology & Oncology | Issue 1/2022

Abstract

Disrupting the methylation of telomeric silencing 1-like (DOT1L)-mediated histone H3 lysine 79 has been implicated in MLL fusion-mediated leukemogenesis. Recently, DOT1L has become an attractive therapeutic target for MLL-rearranged leukemias. Rigorous studies have been performed, and much progress has been achieved. Moreover, one DOT1L inhibitor, EPZ-5676, has entered clinical trials, but its clinical activity is modest. Here, we review the recent advances and future trends of various therapeutic strategies against DOT1L for MLL-rearranged leukemias, including DOT1L enzymatic activity inhibitors, DOT1L degraders, protein–protein interaction (PPI) inhibitors, and combinatorial interventions. In addition, the limitations, challenges, and prospects of these therapeutic strategies are discussed. In summary, we present a general overview of DOT1L as a target in MLL-rearranged leukemias to provide valuable guidance for DOT1L-associated drug development in the future. Although a variety of DOT1L enzymatic inhibitors have been identified, most of them require further optimization. Recent advances in the development of small molecule degraders, including heterobifunctional degraders and molecular glues, provide valuable insights and references for DOT1L degraders. However, drug R&D strategies and platforms need to be developed and preclinical experiments need to be performed with the purpose of blocking DOT1L-associated PPIs. DOT1L epigenetic-based combination therapy is worth considering and exploring, but the therapy should be based on a thorough understanding of the regulatory mechanism of DOT1L epigenetic modifications.

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Title: Targeting the histone H3 lysine 79 methyltransferase DOT1L in MLL-rearranged leukemias
Authors: Yan Yi
Shenglei Ge
Publication date: 01-12-2022
Publisher: BioMed Central
Keywords: Leukemia
Epigenetics
Published in: Journal of Hematology & Oncology / Issue 1/2022
Electronic ISSN: 1756-8722
DOI: https://doi.org/10.1186/s13045-022-01251-1

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