Targeting Bcr-Abl by combining allosteric with ATP-binding-site inhibitors.
Nature
; 463(7280): 501-6, 2010 Jan 28.
Article
em En
| MEDLINE
| ID: mdl-20072125
ABSTRACT
In an effort to find new pharmacological modalities to overcome resistance to ATP-binding-site inhibitors of Bcr-Abl, we recently reported the discovery of GNF-2, a selective allosteric Bcr-Abl inhibitor. Here, using solution NMR, X-ray crystallography, mutagenesis and hydrogen exchange mass spectrometry, we show that GNF-2 binds to the myristate-binding site of Abl, leading to changes in the structural dynamics of the ATP-binding site. GNF-5, an analogue of GNF-2 with improved pharmacokinetic properties, when used in combination with the ATP-competitive inhibitors imatinib or nilotinib, suppressed the emergence of resistance mutations in vitro, displayed additive inhibitory activity in biochemical and cellular assays against T315I mutant human Bcr-Abl and displayed in vivo efficacy against this recalcitrant mutant in a murine bone-marrow transplantation model. These results show that therapeutically relevant inhibition of Bcr-Abl activity can be achieved with inhibitors that bind to the myristate-binding site and that combining allosteric and ATP-competitive inhibitors can overcome resistance to either agent alone.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Leucemia Mielogênica Crônica BCR-ABL Positiva
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Proteínas de Fusão bcr-abl
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Resistencia a Medicamentos Antineoplásicos
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Antineoplásicos
Limite:
Animals
/
Female
/
Humans
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Male
Idioma:
En
Revista:
Nature
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Estados Unidos