J Gastroenterology:姜黄素和NQO1抑制剂的联合使用可以对食管鳞状细胞癌有显着的抗肿瘤作用

2019-02-10 MedSci MedSci原创

食管鳞状细胞癌(ESCC)是最难治的癌症之一,因此需要开发新的治疗方法来改善患者的预后。姜黄素(Curcumin)是一种来自Curcuma longa的多酚,具有多种健康益处,包括抗肿瘤作用,但由于生物利用度低,其临床应用受到限制。Theracurmin(THC)是一种胶态亚微米颗粒的可以获得高度生物可利用姜黄素。因此,本项研究旨在探究姜黄素对于食管癌的抗肿瘤作用。

背景
食管鳞状细胞癌(ESCC)是最难治的癌症之一,因此需要开发新的治疗方法来改善患者的预后。姜黄素(Curcumin)是一种来自Curcuma longa的多酚,具有多种健康益处,包括抗肿瘤作用,但由于生物利用度低,其临床应用受到限制。Theracurmin(THC)是一种胶态亚微米颗粒的可以获得高度生物可利用姜黄素。因此,本项研究旨在探究姜黄素对于食管癌的抗肿瘤作用。

方法
研究人员通过细胞活力测定,集落和球状体形成测定以及异种移植模型检查了THC对ESCC细胞的抗肿瘤作用。为了揭示其机制,研究人员同时研究了活性氧(ROS)的水平并进行了微阵列基因表达分析。根据这些分析,研究人员重点关注NQO1,因为其参与了ROS的去除,并通过NQO1敲低或过表达对检验了对THC治疗的影响。此外,研究人员还研究了THC和NQO1抑制剂对ESCC患者来源的异种移植物(PDX)的治疗效果。

结果
THC在ESCC细胞中会引起细胞毒性,并且比姜黄素更有效地抑制异种移植肿瘤的生长。THC增加ROS水平并激活NRF2-NMRAL2P-NQO1表达。通过shRNA或NQO1抑制剂抑制ESCC细胞中的NQO1导致细胞对THC的敏感性增加,而NQO1的过表达会拮抗此现象。值得注意的是,NQO1抑制剂显着增强THC在ESCC PDX肿瘤中的抗肿瘤作用。

结论
本项研究的结果表明THC与NQO1抑制剂联合治疗可以作为ESCC治疗新选择。

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    2019-10-17 jklm09
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    2019-03-03 许安
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    2019-02-12 zhouqu_8
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