Homoharringtonine combined with aclarubicin and cytarabine synergistically induces apoptosis in t(8;21) leukemia cells and triggers caspase-3-mediated cleavage of the AML1-ETO oncoprotein.
Homoharringtonine combined with aclarubicin and cytarabine synergistically induces apoptosis in t(8;21) leukemia cells and triggers caspase-3-mediated cleavage of the AML1-ETO oncoprotein.
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高三尖杉酯碱与阿克拉霉素和阿糖胞苷联合协同诱导 t(8;21) 白血病细胞凋亡,并触发 caspase-3 介导的 AML1-ETO 癌蛋白裂解
DOI:
10.1002/cam4.913
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发表时间:
2016-11
期刊:
影响因子:
4
通讯作者:
Xu, Kai-Lin
中科院分区:
文献类型:
--
作者:
Cao, Jiang;Feng, Hao;Ding, Ning-Ning;Wu, Qing-yun;Chen, Chong;Niu, Ming-Shan;Chen, Wei;Qiu, Ting-Ting;Zhu, Hong-Hu;Xu, Kai-Lin
关键词:
Homoharringtonine combined with aclarubicin and cytarabine (HAA) is a highly effective treatment for acute myeloid leukemia (AML), especially for t(8;21) AML. However, the underlying mechanisms by which HAA kills t(8;21) AML cells remain unclear. In this study, SKNO‐1 and Kasumi‐1 cells with t(8;21) were used. Compared with individual or pairwise administration of homoharringtonine, aclarubicin, or cytarabine, HAA showed the strongest inhibition of growth and induction of apoptosis in SKNO‐1 and Kasumi‐1 cells. HAA caused cleavage of the AML1‐ETO (AE) oncoprotein to form truncated AE (ΔAE). Pretreatment with the caspase‐3 inhibitor caspase‐3 inhibitor Q‐DEVD‐OPh (QDO) not only suppressed HAA‐induced apoptosis but also abrogated the cleavage of AE and generation of ΔAE. These results suggest that HAA synergistically induces apoptosis in t(8;21) leukemia cells and triggers caspase‐3‐mediated cleavage of the AML1‐ETO oncoprotein, thus providing direct evidence for the strong activity of HAA toward t(8;21) AML.
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