在KMT2A:MLLT3诱导的AML中,TIFAB通过HNF4A调节了代谢途径
Yang Wang1, Yan Xiu1, Qianze Dong1
1Department of Pathology, Case Western Reserve University, Cleveland, OH.
Blood advances
|December 3, 2024
概括
瘤亡因子 (TNF) 受体关联因子 (TRAF) 相互作用蛋白与关联域B (TIFAB) 对于急性髓性白血病 (AML) 的发展至关重要. TIFAB-HNF4A轴调节白血病干细胞代谢和移植.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 血液学 血液学 血液学
背景情况:
- 瘤亡因子 (TNF) 受体关联因子 (TRAF) 相互作用蛋白与关联域B (TIFAB) 是一种NF-κB信号抑制剂,参与血液形成和白血病.
- 之前已经证明,TIFAB通过上调Hoxa9或下调p53信号来增强KMT2A::MLLT3驱动的急性髓性白血病 (AML).
研究的目的:
- 调查TIFAB在KMT2A::MLLT3诱导的AML中的作用,重点关注其对白血病干细胞/原生细胞 (LSPC) 功能和代谢的影响.
- 确定TIFAB在AML病变发生过程中的关键下游目标.
主要方法:
- 在KMT2A::MLLT3诱导的AML小鼠模型中的Tifab删除.
- 对LSPC移植,葡萄糖吸收和线粒体功能的分析.
- 基因组丰富分析 (GSEA) 用于识别下调的途径.
- 在TIFAB过度表达和Tifab删除的LSPC之间对基因表达特征的比较.
- 使用肝细胞核因子4α (Hnf4a) 的功能性救援实验.
主要成果:
- 在KMT2A::MLLT3诱导的AML中,tifab删除损害了LSPC移植,葡萄糖吸收和线粒体功能.
- 提法除导致MYC,HOXA9/MEIS1,mTORC1信号传递,糖解和氧化酸化基因的下调.
- 肝细胞核因子4α (Hnf4a) 被确定为一个关键的TIFAB目标,由NF-κB组件RelB.调节.
- HNF4A表达拯救了代谢缺陷,并增强了由Tifab删除引起的LSPC移植.
- Hnf4a敲击减弱的TIFAB介导的LSPC功能的增强.
结论:
- TIFAB-HNF4A轴对KMT2A::MLLT3诱导的AML病原性至关重要.
- 通过通过HNF4A调节LSPC代谢和移植,TIFAB促进AML.
- 这项研究揭示了白血病生物学中的新型调节剂,具有潜在的治疗意义.
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