Activation of p53 by SIRT1 inhibition enhances elimination of CML leukemia stem cells in combination with imatinib.
Activation of p53 by SIRT1 inhibition enhances elimination of CML leukemia stem cells in combination with imatinib.
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DOI:
10.1016/j.ccr.2011.12.020
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发表时间:
2012-02-14
期刊:
影响因子:
50.3
通讯作者:
Bhatia R
中科院分区:
文献类型:
--
作者:
Li L;Wang L;Li L;Wang Z;Ho Y;McDonald T;Holyoake TL;Chen W;Bhatia R
BCR-ABL tyrosine kinase inhibitors (TKI) fail to eliminate quiescent leukemia stem cells (LSC) in chronic myelogenous leukemia (CML). Thus strategies targeting LSC are required to achieve cure. We show that the NAD+ dependent deacetylase SIRT1 is overexpressed in human CML LSC. Pharmacological inhibition of SIRT1 or SIRT1 knockdown increased apoptosis in LSC of chronic phase and blast crisis CML and reduced their growth in vitro and in vivo. SIRT1 effects were enhanced in combination with the BCR-ABL TKI imatinib. SIRT1 inhibition increased p53 acetylation and transcriptional activity in CML progenitors, and the inhibitory effects of SIRT1 targeting on CML cells depended on p53 expression and acetylation. Activation of p53 via SIRT1 inhibition represents a potential approach to target CML LSC.
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通讯作者:
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