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Clin Cancer Res. 2017 Nov 15;23(22):6969-6981. doi: 10.1158/1078-0432.CCR-17-1259. Epub 2017 Aug 30.

Chemogenomic Landscape of RUNX1-mutated AML Reveals Importance of RUNX1 Allele Dosage in Genetics and Glucocorticoid Sensitivity.

Author information

1
The Leucegene Project at Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, Québec, Canada.
2
Division of Hematology, Maisonneuve-Rosemont Hospital, Montréal, Québec, Canada.
3
Department of Computer Science and Operations Research, Université de Montréal, Montréal, Canada.
4
Department of Chemistry, Université de Montréal, Montréal, Canada.
5
The Leucegene Project at Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, Québec, Canada. guy.sauvageau@umontreal.ca josee.hebert@umontreal.ca.
6
Leukemia Cell Bank of Quebec, Maisonneuve-Rosemont Hospital, Montréal, Canada.
7
Department of Medicine, Faculty of Medicine, Université de Montréal, Montréal, Canada.

Abstract

Purpose:RUNX1-mutated (RUNX1mut) acute myeloid leukemia (AML) is associated with adverse outcome, highlighting the urgent need for a better genetic characterization of this AML subgroup and for the design of efficient therapeutic strategies for this disease. Toward this goal, we further dissected the mutational spectrum and gene expression profile of RUNX1mut AML and correlated these results to drug sensitivity to identify novel compounds targeting this AML subgroup.Experimental Design: RNA-sequencing of 47 RUNX1mut primary AML specimens was performed and sequencing results were compared to those of RUNX1 wild-type samples. Chemical screens were also conducted using RUNX1mut specimens to identify compounds selectively affecting the viability of RUNX1mut AML.Results: We show that samples with no remaining RUNX1 wild-type allele are clinically and genetically distinct and display a more homogeneous gene expression profile. Chemical screening revealed that most RUNX1mut specimens are sensitive to glucocorticoids (GCs) and we confirmed that GCs inhibit AML cell proliferation through their interaction with the glucocorticoid receptor (GR). We observed that specimens harboring RUNX1 mutations expected to result in low residual RUNX1 activity are most sensitive to GCs, and that coassociating mutations as well as GR levels contribute to GC sensitivity. Accordingly, acquired glucocorticoid sensitivity was achieved by negatively regulating RUNX1 expression in human AML cells.Conclusions: Our findings show the profound impact of RUNX1 allele dosage on gene expression profile and glucocorticoid sensitivity in AML, thereby opening opportunities for preclinical testing which may lead to drug repurposing and improved disease characterization. Clin Cancer Res; 23(22); 6969-81. ©2017 AACR.

PMID:
28855357
DOI:
10.1158/1078-0432.CCR-17-1259
[Indexed for MEDLINE]
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