Cancer Cell:FTO抑制剂研究新进展

2019-04-18 不详 上海药物研究所

4月15日,中国科学院上海药物研究所杨财广课题组与美国陈建军课题组和钱志坚课题组合作研究,在化学干预RNA甲基化(m6A)修饰方向上取得新进展。研究成果“Small-molecule Targeting of Oncogenic RNA Demethylase FTO in Acute Myeloid Leukemia”在线发表于Cancer Cell。

4月15日,中国科学院上海药物研究所杨财广课题组与美国陈建军课题组和钱志坚课题组合作研究,在化学干预RNA甲基化(m6A)修饰方向上取得新进展。研究成果“Small-molecule Targeting of Oncogenic RNA Demethylase FTO in Acute Myeloid Leukemia”在线发表于Cancer Cell。

靶向DNA甲基化酶或者组蛋白修饰酶的数个新药获批用于治疗癌症,表观遗传学影响基因表达的化学干预研究已经成为国际上药物新靶标研究的活跃领域。以m6A修饰为核心内容的表观转录学研究尚处于早期阶段。发现高质量化学探针,靶向性干预m6A修饰,不但可以加速表观转录学基础研究,同时将推动m6A调控蛋白质的靶标成药性确证,在生命科学和新药发现领域同时展现重要科学意义。

2011年,FTO(脂肪组织与肥胖相关蛋白质)被确证为调控RNA甲基化修饰的去甲基化酶。这一发现揭示了细胞内m6A修饰是动态可逆的过程,掀起了m6A修饰及其调控蛋白质生物学研究热潮,逐步形成了以m6A修饰为核心内容的表观转录学研究新方向。最近发现,FTO基因是白血病乳腺癌、成胶质细胞脑瘤等癌症发生的重要致癌基因之一。国际上,高质量的FTO抑制剂及其干预m6A修饰在抗肿瘤靶标成药性的研究尚处于早期探索阶段。该研究以急性髓细胞白血病(AML)亚型中高表达的FTO为靶标,根据FTO识别m6A修饰底物的分子机制等特点,应用基于晶体结构的化合物设计、合成优化等手段,获得FTO小分子抑制剂。该化合物选择性抑制AML细胞中FTO的去甲基化功能,上调AML关键基因mRNA上m6A修饰,增加抑癌蛋白质例如ASB2和RARA的丰度,降低促癌蛋白质例如MYC和CEBPA的丰度,从而抑制AML细胞增殖,并且在PDX小鼠模型上展现抗白血病的治疗效果。此项研究从分子以及细胞层面上较充分表征了FTO抑制剂的选择性和靶向性,但其细胞内的作用机制尚需深入探索。由于FTO以及m6A修饰在实体瘤中也发挥关键的调控作用,该项研究针对RNA去甲基化酶FTO能否作为抗肿瘤药物靶标实现了药理功能确证,指明了分子靶向性干预m6A修饰从而影响基因表达来实现抗肿瘤的研究新方向。

原始出处:

YueHuang,et al.Small-Molecule Targeting of Oncogenic FTO Demethylase in Acute Myeloid Leukemia.Cancer Cell.Volume 35, Issue 4, 15 April 2019, Pages 677-691.e10

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    2020-01-14 维他命
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    2019-12-11 jklm09
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    2019-04-20 仁者大医

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近日,一项最新研究论文阐明了血管内皮生长因子信号(VEGF)在急性髓细胞白血病(AML)中的相关作用。在AML患者骨髓中血管内皮生长因子信号是异常的,其与癌症患者预后较差有关。信号转导通路的改变表现为存在多个自分泌和旁分泌信号通路共同干预。 血管内皮生长因子信号促进急性髓细胞白血病细胞增殖、生存以及抵抗化疗,产生耐药性。此外在急性髓细胞白血病中,血管内皮生长因子信号可以调解血管内皮细胞的旁分泌控