Sci Rep:肉盘菌内酯能够抑制STAT/AR信号途径和抑制恩杂鲁胺抗性前列腺癌

2018-12-10 AlexYang MedSci原创

大多数前列腺癌患者会在雄激素阻断治疗后恶化发展到去势抵抗性(CRPC)状态,尽管新的有效的抗雄激素药物的开发,比如恩杂鲁胺(ENZ)能够延长CRPC患者的生存,但是ENZ抗性会很快产生。雄激素受体(AR)的重新激活是抗性产生的一个主要机制。最近,有研究人员通过其体内来源的ENZ抗性模型,发现STAT3转录因子不仅在核定位中增加,同时能够结合和促进AR活性。研究人员观察到了在ENZ抗性细胞中STAT

大多数前列腺癌患者会在雄激素阻断治疗后恶化发展到去势抵抗性(CRPC)状态,尽管新的有效的抗雄激素药物的开发,比如恩杂鲁胺(ENZ)能够延长CRPC患者的生存,但是ENZ抗性会很快产生。

雄激素受体(AR)的重新激活是抗性产生的一个主要机制。最近,有研究人员通过其体内来源的ENZ抗性模型,发现STAT3转录因子不仅在核定位中增加,同时能够结合和促进AR活性。研究人员观察到了在ENZ抗性细胞中STAT3 S727磷酸化的增加,这能够促进与AR的结合。明显的是,ENZ抗性细胞要比CRPC细胞对STAT3 DNA结合抑制剂肉盘菌内酯(GPA500)更加敏感。使用GPA500治疗能够抑制AR活性和显著减少细胞周期蛋白D1表达的减少,从而减少细胞周期到S期和阻碍细胞增殖。体内试验中,GAP500能够减少肿瘤体积和血清PSA。最后,ENZ和GPA500治疗组合在抑制LNCaP和CRPC细胞的AR活性和细胞增殖方面具有加性效应,为组合治疗提供了理论基础。

最后,研究人员指出,这些结果表明了STAT3抑制剂是ENZ抗性前列腺癌的合理治疗药物选择,也许在组合ENZ治疗CRPC中很有价值。

原始出处:

Daksh Thaper, Sepideh Vahid, Ramandeep Kaur et al. Galiellalactone inhibits the STAT3/AR signaling axis and suppresses Enzalutamide-resistant Prostate Cancer. Sci Rep. 23 Nov 2018.

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    2019-11-18 yige2012
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    2018-12-12 飛歌

    学习了很有用不错

    0