Nat Med:G9a/DNMT的抑制能够激发免疫调控的膀胱癌退化

2019-07-18 AlexYang MedSci原创

膀胱癌在晚期、肌层浸润阶段是致死的,并且治疗的方法非常有限。最近的分子特性鉴定确定了膀胱癌新的(表观)遗传驱使因子和潜在的靶位点。免疫检查点抑制剂具有很明显的疗效,但是仅仅适用于一部分的膀胱癌患者。最近,有研究人员表明了G9a (EHMT2)的表达与膀胱癌不良临床结果相关,并且利用一种新的抑制剂(CM-272)靶定G9a/DNMT甲基转移酶活性能够诱导细胞凋亡和免疫原性细胞死亡。研究人员在4个基因

膀胱癌在晚期、肌层浸润阶段是致死的,并且治疗的方法非常有限。最近的分子特性鉴定确定了膀胱癌新的(表观)遗传驱使因子和潜在的靶位点。免疫检查点抑制剂具有很明显的疗效,但是仅仅适用于一部分的膀胱癌患者。

最近,有研究人员表明了G9a (EHMT2)的表达与膀胱癌不良临床结果相关,并且利用一种新的抑制剂(CM-272)靶定G9a/DNMT甲基转移酶活性能够诱导细胞凋亡和免疫原性细胞死亡。研究人员在4个基因(PtenloxP/loxPTrp53loxP/loxPRb1loxP/loxPRbl1-/-)敲除转基因恶性转移、肌层浸润膀胱癌小鼠中阐释了CM-272+铂治疗能够产生已建成肿瘤和转移的统计学显著退化。当CM-272与抗细胞程序性死亡配体1组合使用时其抗肿瘤效果更佳,甚至是没有铂存在时效果仍旧很好。这些效果与内源性抗肿瘤免疫响应和免疫原性细胞死亡有关。最后,研究人员还发现在一些膀胱癌患者中,G9a表达的增加与对细胞程序性死亡蛋白1抑制剂的抗性有关。

最后,研究人员指出,他们的发现支持了使用表观遗传抑制剂和免疫检查点阻断剂组合使用来治疗膀胱癌的疗法。

原始出处:

Cristina Segovia, Edurne San José-Enériz, Ester Munera-Maravilla et al. Inhibition of a G9a/DNMT network triggers immune-mediated bladder cancer regression. Nat Med. 03 Jul 2019

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    2020-04-10 liye789132251
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    2019-07-19 龙胆草

    学习谢谢分享

    0

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    2019-07-19 深海的鱼

    学习学习学习

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    2019-07-19 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

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    2019-07-19 txqjm

    谢谢了,学习

    0

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