生物
增强子
癌症研究
异位表达
转录因子
髓系白血病
髓样
Erg公司
基因
白血病
清脆的
遗传学
ETS转录因子家族
神经科学
视网膜
作者
Johannes Schmoellerl,Inês Barbosa,Martina Minnich,Florian Andersch,Leonie Smeenk,Marije Havermans,Thomas Eder,Tobias Neumann,Julian Jude,Michaela Fellner,Anja Ebert,Monika Steininger,Ruud Delwel,Florian Grebien,Johannes Zuber
出处
期刊:Blood
[American Society of Hematology]
日期:2023-02-02
卷期号:141 (5): 453-466
被引量:10
标识
DOI:10.1182/blood.2022016592
摘要
Chromosomal rearrangements involving the MDS1 and EVI1 complex locus (MECOM) on chromosome 3q26 define an aggressive subtype of acute myeloid leukemia (AML) that is associated with chemotherapy resistance and dismal prognosis. Established treatment regimens commonly fail in these patients, therefore, there is an urgent need for new therapeutic concepts that will require a better understanding of the molecular and cellular functions of the ecotropic viral integration site 1 (EVI1) oncogene. To characterize gene regulatory functions of EVI1 and associated dependencies in AML, we developed experimentally tractable human and murine disease models, investigated the transcriptional consequences of EVI1 withdrawal in vitro and in vivo, and performed the first genome-wide CRISPR screens in EVI1-dependent AML. By integrating conserved transcriptional targets with genetic dependency data, we identified and characterized the ETS transcription factor ERG as a direct transcriptional target of EVI1 that is aberrantly expressed and selectively required in both human and murine EVI1-driven AML. EVI1 controls the expression of ERG and occupies a conserved intragenic enhancer region in AML cell lines and samples from patients with primary AML. Suppression of ERG induces terminal differentiation of EVI1-driven AML cells, whereas ectopic expression of ERG abrogates their dependence on EVI1, indicating that the major oncogenic functions of EVI1 are mediated through aberrant transcriptional activation of ERG. Interfering with this regulatory axis may provide entry points for the development of rational targeted therapies.
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