ABL1 and acute lymphoblastic leukemia: We previously demonstrated an increased miR-17∼92 expression in chronic phase chronic myeloid leukaemia CD34+ cells, compared to normal CD34+ cells from healthy donors.14 Based on this, we analysed expression of miR-17∼92 encoded miRNAs in 14 BCR-ABL-negative and 13 BCR-ABL-positive ALL samples, as well as normal CD34+ cells, using miR-qRT-PCR.