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Current Cancer Drug Targets

Editor-in-Chief

ISSN (Print): 1568-0096
ISSN (Online): 1873-5576

A New Strategy to Target Acute Myeloid Leukemia Stem and Progenitor Cells Using Chidamide, a Histone Deacetylase Inhibitor

Author(s): Yin Li, Kai Chen, Yong Zhou, Yiren Xiao, Manman Deng, Zhiwu Jiang, Wei Ye, Xiangmeng Wang, Xinru Wei, Jie Li, Jiabao Liang, Zhongxin Zheng, Yao Yao, Weiguang Wang, Peng Li and Bing Xu

Volume 15, Issue 6, 2015

Page: [493 - 503] Pages: 11

DOI: 10.2174/156800961506150805153230

Price: $65

Abstract

Leukemia stem cells (LSCs) are responsible for treatment failure and relapse in acute myeloid leukemia (AML). Therefore, development of novel LSCs-targeting therapeutic strategies is of crucial clinical importance to improve the treatment outcomes of AML. Histone deacetylase (HDAC) inhibitors have shown potent and specific anticancer stem cell activities in preclinical studies. Chidamide, a novel benzamide-type selectively HDAC inhibitor, has been reported to induce G1 arrest and apoptosis in the relatively mature progenitor population, whereas its effect on primitive LSCs has not been clarified. In this study, we demonstrated that chidamide specifically induces apoptosis in LSC-like cells and primary AML CD34+ cells in a concentration- and time-dependent manner. Our further molecular mechanistic study uncovered that chidamide induces LSCs death by activation of reactive oxygen species (ROS). It compromises the mitochondria membrane potential, modulates antiapoptotic and pro-apoptotic proteins in BCL2 family and activates caspase-3 leading to PARP degradation. Meanwhile, chidamide activates CD40 and modulates its downstream signaling pathways, JNK and NFκB. The results of this study suggest that chidamide may be a novel LSC-targeting agent for AML therapeutics.

Keywords: Acute myeloid leukemia, CD40, histone deacetylase inhibitor, Leukemia stem cells, mitochondria, reactive oxygen species.

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