癸他滨
下调和上调
基因敲除
Fms样酪氨酸激酶3
流式细胞术
癌症研究
细胞凋亡
化学
阿糖胞苷
分子生物学
髓系白血病
生物
基因表达
生物化学
DNA甲基化
突变
基因
作者
Xiaoli Hu,Jiayi Cai,Jianyi Zhu,Wenjing Lang,Jian‐Jiang Zhong,Hua Zhong,Fangyuan Chen
标识
DOI:10.1016/j.cellsig.2019.109409
摘要
FMS-like tyrosine kinase 3 (FLT3)-mutant acute myeloid leukemia (AML) which occurs in approximately 30% of all AML patients still has a poor prognosis. This study aimed to examine the effect of decitabine (DAC) on FLT3-ITD positive AML. In our study, we found that expression of FLT3 and its downstream targets was decreased in FLT3-ITD mutant cell lines treated with DAC. DAC treatment could increase the percentage of apoptotic cells and CD11b positive cells tested by flow cytometry and upregulate the expression of cleaved caspase3, cleaved PARP, C/EBPa and PU.1 detected by western blot. To explore the effect of increased expression of PU.1 on FLT3 protein, we transiently transfected MOLM13 and MV4-11 cells with siRNA against PU.1 and a siRNA control. In both FLT3-ITD positive cells, the effect of DAC on downregulation of FLT3 was diminished in PU.1-konckdown MOLM13 and MV4-11 cells and there was a decrease of CD11b expression after PU.1 knockdown. Furthermore, the percentage of apoptotic cells was also decreased in PU.1-konckdown cells compared with siRNA control-expressing cells with the same dose of DAC. These findings indicated that DAC upregulated PU.1 to induce downregulation of FLT3 to trigger apoptosis. DAC was also found efficacious in mouse xenograft models of FLT3-ITD AML in our study. These findings may provide a novel theoretical basis for treatment of FLT3-ITD positive AML patients.
科研通智能强力驱动
Strongly Powered by AbleSci AI