ABCG2 downregulation in glioma stem cells enhances the therapeutic efficacy of demethoxycurcumin.

ABCG2 downregulation in glioma stem cells enhances the therapeutic efficacy of demethoxycurcumin.
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胶质瘤干细胞中 ABCG2 的下调增强了去甲氧基姜黄素的治疗效果

DOI:
10.18632/oncotarget.18018
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发表时间:
2017-06-27
期刊:
影响因子:
--
通讯作者:
Zhou Y
Zhou Y
中科院分区:
其他
文献类型:
--
作者:
Chen L;Shi L;Wang W;Zhou Y

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我们分析了药物转运蛋白ABCG 2在确定胶质瘤干细胞(GSC)对去甲氧基姜黄素(DMC)敏感性中的作用。我们首先证明了ABCG 2在GSC中比原代星形胶质细胞中表达更高。通过转染ABCG 2 shRNA或编码ABCG 2的慢病毒载体对GSC中ABCG 2水平的调节揭示了ABCG 2水平与DMC诱导的GSC生长抑制之间的负相关。抑制ABCG 2增加DMC诱导的GSC凋亡和G 0/G1细胞周期阻滞。它还增加了用DMC处理的GSC中的活性氧(ROS)水平,导致细胞色素C和半胱天冬酶-3活性增加。将转染ABCG 2 shRNA或过表达ABCG 2的GSCs移植于荷瘤免疫缺陷小鼠,经DMC处理后,ABCG 2表达抑制肿瘤增殖率(T/C %)。这些发现表明,ABCG 2表达对于GSC中的DMC抗性至关重要,并且是GBM的潜在治疗靶点。
We analyzed the role of ABCG2, a drug transporter, in determining the sensitivity of glioma stem cells (GSCs) to demethoxycurcumin (DMC). We first demonstrated that ABCG2 is more highly expressed in GSCs than primary astrocytes. Modulation of ABCG2 levels in GSCs by transfection of ABCG2 shRNA or a lentiviral vector encoding ABCG2 revealed an inverse relation between ABCG2 levels and DMC-induced GSC growth inhibition. Suppressing ABCG2 increased DMC-induced apoptosis and G0/G1 cell cycle arrest in GSCs. It also increased levels reactive oxygen species (ROS) in GSCs treated with DMC, resulting in increased cytochrome C and caspase-3 activity. When GSCs transfected with ABCG2 shRNA or overexpressing ABCG2 were xenografted and the tumor-bearing, immunodeficient mice were treated with DMC, ABCG2 expression suppressed the tumor proliferation rate (T/C %). These findings demonstrate that ABCG2 expression is critical for DMC resistance in GSCs and is a potential therapeutic target for GBM.
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