USF2 and chronic myelogenous leukemia, BCR-ABL1 positive: In CML, abnormal expression of several miRNAs has been described (miR-15a, miR-16, miR-142, miR-155, miR-181, miR-221, let7a and the polycistronic miR-17-92 cluster) [4-6] and we have currently demonstrated that down-regulation of miR-10a leads to an abnormal proliferation of CML cells through regulation of USF2 gene expression [3].