Sensitivity and engineered resistance of myeloid leukemia cells to BRD9 inhibition.
Nat Chem Biol
; 12(9): 672-9, 2016 09.
Article
en En
| MEDLINE
| ID: mdl-27376689
ABSTRACT
Here we show that acute myeloid leukemia (AML) cells require the BRD9 subunit of the SWI-SNF chromatin-remodeling complex to sustain MYC transcription, rapid cell proliferation and a block in differentiation. Based on these observations, we derived small-molecule inhibitors of the BRD9 bromodomain that selectively suppress the proliferation of mouse and human AML cell lines. To establish these effects as on-target, we engineered a bromodomain-swap allele of BRD9 that retains functionality despite a radically altered bromodomain pocket. Expression of this allele in AML cells confers resistance to the antiproliferative effects of our compound series, thus establishing BRD9 as the relevant cellular target. Furthermore, we used an analogous domain-swap strategy to generate an inhibitor-resistant allele of EZH2. To our knowledge, our study provides the first evidence for a role of BRD9 in cancer and reveals a simple genetic strategy for constructing resistance alleles to demonstrate on-target activity of chemical probes in cells.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Factores de Transcripción
/
Leucemia Mieloide Aguda
/
Resistencia a Antineoplásicos
/
Ingeniería Celular
/
Antineoplásicos
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
Idioma:
En
Revista:
Nat Chem Biol
Asunto de la revista:
BIOLOGIA
/
QUIMICA
Año:
2016
Tipo del documento:
Article