title: The microtubule depolymerizing agent CYT997 effectively kills acute myeloid leukemia cells via activation of caspases and inhibition of PI3K/Akt/mTOR pathway proteins.
abstract: The orally active microtubule-depolymerizing agent CYT997 is potently cytotoxic to a variety of tumorsin vitroandin vivo. However, the effects of this agent on acute myeloid leukemia (AML) cells and its mechanisms are unknown. The present study demonstrated that CYT997 effectively inhibited the growth of AML cellsin vitro. Treatment of AML cells with CYT997 resulted in G2/M phase cell cycle arrest, and induced apoptosis through the activation of extrinsic and intrinsic apoptotic pathways. Furthermore, CYT997 induced cell death in CD123+leukemia cells and significantly reduced leukemia colony formation. CYT997 was also demonstrated to exert dual effects on the expression of PI3K/Akt and mechanistic target of rampamycin (mTOR) signaling pathway proteins. Therefore, CTY997, used alone or in combination with chemotherapy, may represent a promising approach for the treatment of AML.
authors.affiliation: Department of Hematology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang 310015;
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Chen
authors.forename: Chunmei
authors.initials: C
authors.lastname: Yang
authors.forename: Yanhua
authors.initials: Y
authors.lastname: Xu
authors.forename: Hui
authors.initials: H
authors.lastname: Zhou
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.forename: Wenbin
authors.initials: W
authors.lastname: Qian
keywords: CYT997; acute myeloid leukemia; apoptosis