Cancer Med:维生素D3通过VDR和TAp73信号传导串扰增强膀胱癌中对顺铂的反应

2019-04-22 不详 网络

维生素D3(VitD)缺乏与膀胱癌(BCa)发病率的增加和患者生存率的降低有关。除膀胱切除术外,患者接受基于顺铂的化疗,但30%-50%的患者不能从这种治疗中获益。VitD缺乏对化疗反应的影响仍然未知。为了测试VitD补充剂对顺铂反应的影响,我们分析了患者血清VitD水平并将其与存活率相关联。在体内,用顺铂处理VitD缺陷小鼠,用或不用活性VitD代谢物1,25二羟基维生素D3(1,25D3)预处

维生素D3(VitD)缺乏与膀胱癌(BCa)发病率的增加和患者生存率的降低有关。除膀胱切除术外,患者接受基于顺铂的化疗,但30%-50%的患者不能从这种治疗中获益。VitD缺乏对化疗反应的影响仍然未知。

为了测试VitD补充剂对顺铂反应的影响,我们分析了患者血清VitD水平并将其与存活率相关联。在体内,用顺铂处理VitD缺陷小鼠,用或不用活性VitD代谢物1,25二羟基维生素D3(1,25D3)预处理。最后,使用BCa细胞系T24和RT-112,通过凋亡测定以及蛋白质印迹和RT-PCR测定1,25D3和顺铂组合处理的作用机制。

结果显示,低血清25羟基维生素D3(25D3)水平与顺铂的较差反应显著相关。与顺铂单一疗法相比,用1,25D3预处理缺陷小鼠,可减小肿瘤体积。在体外,1,25D3预处理增加了对顺铂的细胞凋亡反应。1,25D3预处理以VDR依赖性方式增加TAp73及其促凋亡靶标的表达。在1,25D3处理后诱导VDR及其转录靶标,并且在1,25D3和顺铂以TAp73依赖性方式组合后进一步增加。

总之,该研究结果表明,VitD缺乏可能是顺铂反应差的生物标志物,用VitD预处理可通过VDR和TAp73信号传导串扰增加对顺铂的凋亡反应。

原始出处:

Bunch BL, Ma Y, et al., Vitamin D3 enhances the response to cisplatin in bladder cancer through VDR and TAp73 signaling crosstalk. Cancer Med. 2019 Apr 10. doi: 10.1002/cam4.2119.

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    2019-07-02 zhyy88
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    2019-04-23 zwjnj2

    学习学习努力学习

    0

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    2019-04-22 留走人康

    膀胱癌真怪,明明是免疫敏感性肿瘤,为什么PD-1治疗效果不好呢?难道靶点不对?将来CD47会不会有效

    0