[Effective and specific control of aml1/eto gene expression in acute myeloid leukemia cells by lentivecior-based...

In presented work, new approach for the control of aml1/eto gene expression in t(8;21)(q22;q22)-positive acute myeloid leukemia cells has been developed. The technique is based on using the RNA-interference and lentiviral transduction methodology. Two new lentiviral vector sets for induction of constitutive anti-aml1/eto RNA-interference in acute myeloid leukemia cells have been developed and tested. The first set was based on use of artificial microRNAs (miRNAs) and second one was intended for production of short hairpin RNAs (shRNAs). It was shown that Kasumi-1 and SKNO-1 leukemia cells can be efficiency transduced by each new lentiviral vector. Moreover, the percent of modified leukemia cells that may be easily evaluated in multiplicity of infection (MOI) test achieved more than 90% for Kasumi-1 and SKNO-1 cells at MOI 40 and 20, respectively. Comparative study elucidated that the anti-aml1/eto shRNA-based approach induced a stronger knock-down of aml1/eto gene in Kasumi-1 and SKNO-1 cells than the miRNA-based method did. We hope that the proposed approach may become useful instrument for controlling the aml1/eto gene expression in vitro as well as in vivo investigations of function and biological role of the gene.