CLIN CANCER RES:Abemaciclib增强非小细胞肺癌放疗敏感性

2018-08-30 MedSci MedSci原创

CLIN CANCER RES近期发表了一篇文章,研究CDK4/6抑制剂Abemaciclib增强非小细胞肺癌细胞放疗敏感性的机制。

CLIN CANCER RES近期发表了一篇文章,研究CDK4/6抑制剂Abemaciclib增强非小细胞肺癌细胞放疗敏感性的机制。

作者通过体外克隆实验,流式细胞学以及靶向抑制评估Abemaciclib在多种非小细胞肺癌细胞系中增强放疗敏感性的作用。通过γH2AX分析评估放疗诱导的DNA损伤修复情况。通过LC/MS质谱及YSI生物学分析评估Abemaciclib联合放疗导致的代谢状态改变。通过异种移植模型对Abemaciclib联合放疗的效果进行体内研究并对组织进行免疫组化染色。研究结果表明,Abemaciclib可以增强非小细胞肺癌细胞系的放疗敏感性,且与RAS或EGFR状态无关。在p53或RB蛋白缺陷的细胞系中对放疗敏感性的增强作用消失。放疗后,Abemaciclib可以抑制DNA损伤修复。Abemaciclib还可以抑制mTOR信号并降低细胞内氨基酸水平,威胁肿瘤细胞营养。体内实验表明,Abemaciclib可以抑制血管生成及肿瘤生长,持续抑制RB/E2F活性,mTOR通路信号以及HIF-1表达。

文章最后认为,Abemaciclib在临床前模型中可以增强非小细胞肺癌放疗敏感性,为非小细胞肺癌患者的联合治疗策略提供了新的选择。

原始出处:
Sarwat Naz,Anastasia Sowers,et al.Abemaciclib,a Selective CDK4/6 Inhibitor,Enhances the Radiosensitivity of Non-Small Cell Lung Cancer in Vitro and in Vivo.CLIN CANCER RES.August 2018 doi:10.1158/1078-0432.CCR-17-3575

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    2019-06-01 yb6560
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    2018-09-01 fengyi812
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