Dasatinib targets chronic myeloid leukemia-CD34+ progenitors as effectively as it targets mature cells.
Haematologica
; 98(6): 896-900, 2013 Jun.
Article
em En
| MEDLINE
| ID: mdl-23065516
ABSTRACT
Dasatinib is effective in most chronic phase chronic myeloid leukemia patients both in first-line therapy and following imatinib failure. While imatinib uptake into CD34(+) cells is low compared to mononuclear cells, few data evaluate how well dasatinib targets primitive CML cells. This study compares intracellular concentration of dasatinib and Bcr-Abl kinase inhibition in CML-CD34(+) progenitors and mononuclear cells induced by dasatinib. The intracellular concentrations of dasatinib were similar between CML-CD34(+) and mononuclear cells (P=0.8). Similarly, there was no significant difference in the degree of dasatinib-mediated Bcr-Abl kinase inhibition. ABCB1 (MDR1) and ABCG2 inhibitors neither increased dasatinib intracellular concentration nor enhanced dasatinib-mediated Bcr-Abl kinase inhibition. In contrast to nilotinib, we show that dasatinib is not an ABCB1 inhibitor. Thus, dasatinib targets CML-CD34(+) progenitors as effectively as it targets mononuclear cells. ABCB1 and ABCG2 efflux pumps do not appear to influence the intracellular dasatinib concentration in CML-CD34(+) progenitors.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Pirimidinas
/
Tiazóis
/
Células-Tronco Neoplásicas
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Leucemia Mielogênica Crônica BCR-ABL Positiva
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Antígenos CD34
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Inibidores de Proteínas Quinases
/
Antineoplásicos
Limite:
Humans
Idioma:
En
Revista:
Haematologica
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Austrália