Cell Death & Differentiation:去泛素化酶USP33能够抑制多烯紫杉醇诱导的细胞凋亡

2019-12-31 AlexYang MedSci原创

去势抵抗性前列腺癌的治疗(CRPC)仍旧面临许多挑战。多烯紫杉醇是CRPC患者中常用的一种化疗药物。然而,基于多烯紫杉醇的化疗常常会引起多烯紫杉醇抗性,部分是CRPC细胞对多烯紫杉醇诱导的细胞凋亡抗性。最近,有研究人员报道了去泛素化酶USP33能够抑制多烯紫杉醇诱导的前列腺癌细胞死亡,包括了不依赖雄激素的前列腺癌细胞。USP33在前列腺癌细胞和组织中过表达。USP33表达的抑制或者敲除能够增强多烯

去势抵抗性前列腺癌的治疗(CRPC)仍旧面临许多挑战。多烯紫杉醇是CRPC患者中常用的一种化疗药物。然而,基于多烯紫杉醇的化疗常常会引起多烯紫杉醇抗性,部分是CRPC细胞对多烯紫杉醇诱导的细胞凋亡抗性。

最近,有研究人员报道了去泛素化酶USP33能够抑制多烯紫杉醇诱导的前列腺癌细胞死亡,包括了不依赖雄激素的前列腺癌细胞。USP33在前列腺癌细胞和组织中过表达。USP33表达的抑制或者敲除能够增强多烯紫杉醇诱导的前列腺癌细胞凋亡,且伴随着JNK磷酸化的增加。通过使用JNK抑制剂SP600125或者siRNA靶向JNK来阻断多烯紫杉醇诱导的JNK激活后,USP33敲除增强的细胞凋亡得到了逆转。更多的是,研究人员发现USP33能够与磷酸化酶DUSP1互作来负调控JNK的激活,而USP33的抑制促进了DUSP1蛋白酶体的降解。同时,研究人员发现USP33能够抑制Lys48 (K48)连接的DUSP1多聚泛素化。更重要的是,DUSP1过表达在多烯紫杉醇治疗的前列腺癌细胞中能够逆转USP33抑制诱导的JNK激活和细胞凋亡。

最后,研究人员指出,USP33在前列腺癌中的过表达能够促使产生多烯紫杉醇抗性,具体是通过抑制伴侣蛋白DUSP1的降解,从而影响JNK激活和细胞凋亡来实现的。他们的研究阐释了USP33-DUSP1-JNK肯呢个是CRPC多烯紫杉醇抗性的关键信号模块,表明了USP33双CRPC潜在的一个新的治疗靶标。

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    2020-08-15 维他命
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    2020-12-02 isabellayj
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    2020-01-02 cy0328
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    2020-01-01 1ddf0692m34(暂无匿称)

    学习了,谢谢分享

    0

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