丢失RNA结合蛋白CELF2通过FAT10-mTORC1促进急性白血病的发展
Tengxiao Guo1,2,3, Yuxia Wang1, Xiaolu Sun1
1State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300020, China.
Oncogene
|March 22, 2024
概括
失去了CELF2蛋白增强了造血干细胞的自我更新,并通过稳定FAT10mRNA加速了急性髓性白血病 (AML) 的发展. 针对CELF2/FAT10-AKT/mTORC1通路提供了AML抑制的潜力.
科学领域:
- 血液学 血液学 血液学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- RNA结合蛋白 (RBPs) 调节基因表达,其中CELF2 (ELAV类家族蛋白2) 影响RNA剪接和造血发育.
- 在急性髓性白血病 (AML) 中观察到CELF2的失调,但其在血液形成和白血病发生中的确切作用尚不清楚.
研究的目的:
- 阐明CELF2在正常血液形成和AML发展中的功能作用.
- 确定CELF2在白血病发生过程中的功能背后的分子机制.
主要方法:
- 在小鼠造血系统和MLL-AF9诱导的AML模型中研究了Celf2缺陷.
- 使用基因表达特征分析,RNA免疫沉测序 (RIP-Seq) 和生化分析.
- 评估了与mTORC1和MA9/DOTL1抑制剂联合治疗的疗效.
主要成果:
- 塞尔夫2缺陷增强了造血干细胞 (HSC) 的自我更新和髓状细胞分化.
- 失去CELF2加速了小鼠的AML发展,与FAT10mRNA稳定和增加AKT/mTORC1信号相关.
- 在相关的小鼠模型中,用Rapamycin和EPZ-5676联合治疗减少了白血病负担.
结论:
- CELF2/FAT10-AKT/mTORC1轴是正常血细胞增殖和AML发展的新型调节器.
- 这一途径为抑制髓性白血病提供了潜在的治疗点.
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