FTO耗尽不会改变m6在AMLmRNA中的静脉测量:使用直接RNA纳米孔测序进行重新评估
Luke S Nicholson1, Catarina Guimarães-Teixeira1,2, Jianheng Fox Liu1
1Department of Pharmacology, Weill Cornell Medicine, Cornell University, New York, NY 10065, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
在急性骨髓性白血病 (AML) 细胞中,RNA脱甲基酶FTO不会去甲基化N6-甲基氨酸 (m6A). FTO的耗尽不会改变m6A水平,这表明其在AML中的作用需要重新评估.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 这种FTO酶与急性髓性白血病 (AML) 有关,因为它可能会在MYC.等瘤转录物上去甲基化N6-甲基氨酸 (m6A).
- 之前的研究表明FTO在AML中的m6A脱甲基酶活性使用了非定量方法,限制了对m6A体积变化的理解.
研究的目的:
- 直接评估FTO是否调节m6A水平在mRNA中,特别是在AML中.
- 研究FTO抑制剂在AML治疗中的作用机制.
主要方法:
- 利用牛津纳米孔直接RNA测序用于单核酸分辨率映射和m6A的量化.
- 在AML细胞系 (MONOMAC-6,MOLM-13) 和HEK293T细胞中使用FTO淘汰,淘汰和药理抑制.
- 评估了FTO抑制剂FB23-2在FTO缺乏细胞中的细胞毒性.
主要成果:
- 在任何经过测试的细胞系中,FTO耗尽并没有改变转录组范围内的m6A静态度或特定的MYC位点.
- FB23-2的抗白血病作用独立于FTO抑制,因为它对FTO缺乏细胞仍然具有细胞毒性.
- 在snRNA中,FTO耗尽显著增加了N6,2'-O-dimethyladenosine (m6Am),表明m6Am是潜在的FTO目标.
结论:
- 这些发现不支持FTO在测试条件下在AML细胞系中作为"m6A擦拭器"的功能.
- 关于FTO在m6A上的拟议脱甲基作用,需要使用定量m6A映射技术进行重新检查.
- 在snRNA中FTO对m6Am的活性为研究提供了新的途径.
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