揭示HDAC抑制剂实体瘤治疗失败机制

2016-09-21 黄辛 中国科学报

中科院上海药物所耿美玉课题组和丁健院士课题组合作,研究揭示了组蛋白去乙酰化酶(HDAC)抑制剂对乳腺癌治疗不敏感的机制。相关研究已在线发表于《癌症细胞》。 HDAC抑制剂是靶向肿瘤表观遗传修饰的分子靶向药物,但其治疗实体肿瘤效果不佳,且因机制不明,尚无合理的用药策略,极大限制其在临床上的广泛使用,成为领域内亟待解决的科学问题。 该研究以乳腺癌/三阴乳腺癌为切入点,首次揭示细胞因子受

中科院上海药物所耿美玉课题组和丁健院士课题组合作,研究揭示了组蛋白去乙酰化酶(HDAC)抑制剂对乳腺癌治疗不敏感的机制。相关研究已在线发表于《癌症细胞》。

HDAC抑制剂是靶向肿瘤表观遗传修饰的分子靶向药物,但其治疗实体肿瘤效果不佳,且因机制不明,尚无合理的用药策略,极大限制其在临床上的广泛使用,成为领域内亟待解决的科学问题。

该研究以乳腺癌/三阴乳腺癌为切入点,首次揭示细胞因子受体家族成员白血病抑制因子受体(LIFR)的反馈激活,是介导HDAC抑制剂治疗实体瘤不敏感的重要原因。研究发现,HDAC抑制剂通过上调LIFR基因启动子区的乙酰化修饰水平,招募组蛋白乙酰化修饰识别蛋白BRD4,进而转录上调肿瘤组织中LIFR表达水平,激活下游JAK-STAT3经典信号通路,致使临床治疗失败。尤为重要的是,联合BRD4或JAK抑制剂能够明显增敏HDAC抑制剂在乳腺癌,特别是三阴性乳腺癌的治疗效果。

专家表示,该项研究成果对指导HDAC抑制剂治疗其他实体瘤具有普遍的指导意义,而LIFR-STAT3的激活则是HDAC抑制剂联合用药的重要标志物,其基于机制的联合用药策略将具有重要的临床转化价值。

《中国科学报》 (2016-09-21 第4版 综合)

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    2017-08-21 lingaifan
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    2016-09-21 doctorJiangchao

    继续学习

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