Evaluation of checkpoint kinase targeting therapy in acute myeloid leukemia with complex karyotype
2012
jullien , Denis(collaborateur) (INRA , St-Martin-Du-Touch (France). UMR 1331 Toxicologie Alimentaire) | DUCOMMUN , Bernard(auteur de correspondance) (Université de Toulouse, Toulouse(FR). CHU de Toulouse; Service d’Hématologie)
There has been considerable interest in targeting cell cycle checkpoints particularly in emerging and alternative anticancer strategies. Here, we show that checkpoint abrogation by AZD7762, a potent and selective CHK1/2 kinase inhibitor enhances genotoxic treatment e!cacy in immature KG1a leukemic cell line and in AML patient samples, particularly those with a complex karyotype, which display major genomic instability and chemoresistance. Furthermore, these data suggest that constitutive DNA-damage level might be useful markers to select AML patients susceptible to receive checkpoint inhibitor in combination with conventional chemotherapy. Moreover, this study demonstrates for the "rst time that AZD7762 inhibitor targets the CD34+CD38-CD123+ primitive leukemic progenitors, which are responsible for the majority of AML patients relapse. Finally, CHK1 inhibition does not seem to a#ect clonogenic potential of normal hematopoietic progenitors.
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