在急性髓性白血病中,BCLAF1将RNA剪接与ATF4依赖的代谢适应联系起来
bioRxiv : the preprint server for biology
|February 6, 2026
概括
在急性髓性白血病 (AML) 中,BCLAF1调节mRNA拼接和新陈代谢. 它的耗尽降低了ATF4水平,影响了氨基酸合成,使AML细胞对venetoclax敏感,揭示了新的治疗点.
科学领域:
- 分子生物学分子生物学
- 癌症生物学 癌症生物学
- 血液学 血液学 血液学
背景情况:
- 急性髓性白血病 (AML) 的发病包括遗传和非遗传因素.
- 维持AML的非突变机制比遗传变化更少被了解.
- 异常的RNA拼接和代谢重编程是癌症的标志,但它们之间的联系尚不清楚.
研究的目的:
- 为了确定AML进展的非遗传调节者.
- 调查BCLAF1在AML中的作用.
- 探索RNA剪接和AML中的代谢之间的联系.
主要方法:
- 利用人类AML细胞系和小鼠AML模型.
- 研究了BCLAF1与结合体组件的相互作用.
- 分析了mRNA处理,特别是内子保留和ATF4拼接.
- 评估了代谢基因表达和氨基酸生物合成.
- 在BCLAF1耗尽时评估了静脉的敏感性.
主要成果:
- BCLAF1在物理上与结合体组件结合,并调节替代拼接,特别是内子保留.
- BCLAF1对于有效的ATF4mRNA拼接至关重要,维持ATF4蛋白水平.
- 失去BCLAF1会减少ATF4,降低代谢基因的调节,并破坏氨基酸生物合成.
- 由于BCLAF1的枯竭,AML细胞对BCL-2抑制剂venetoclax产生敏感性.
结论:
- BCLAF1是协调mRNA剪接和AML中的代谢适应的关键调节器.
- 这项研究揭示了RNA剪接和AML中的氨基酸代谢之间的新联系.
- BCLAF1代表了AML治疗的潜在治疗标.
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