Akt activation potently modulates some downstream targets such as multidrug resistance protein 1 (MRP1), Bcl-2 family members, and caspase cascades.43 According to our findings, the apoptosis induced by combined treatment enhanced by HDAC2 suppression is correlated with suppressing the PI3K/Akt signaling pathway in CML cells resistant to IM, whereas PI3K/Akt suppression reversed such results. Here, ABCB1 is linked to chronic myelogenous leukemia, BCR-ABL1 positive.