在急性髓细胞白血病中,THRAP3通过SLU7介导的GIT2替代拼接来促进铁灭症抵抗
Dan Wang1,2, Zhixiang Wu1,2, Siyang Liu1,2
1Department of Pediatrics, Third Xiangya Hospital, Central South University, Changsha, Hunan, China.
Nature communications
|December 1, 2025
概括
甲状腺激素受体关联蛋白3 (THRAP3) 通过改变基因剪接,促进急性髓性白血病 (AML) 中的铁灭性抵抗. 抑制THRAP3可能为AML治疗提供了一个新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 诱导铁亡是一种有前途的策略,用于抗化疗耐药的急性髓性白血病 (AML).
- 甲状腺激素受体关联蛋白3 (THRAP3) 在AML铁化中的作用尚不清楚.
- 高THRAP3表达与AML患者的预后不佳相关.
研究的目的:
- 研究THRAP3在AML细胞铁亡中的作用和机制.
- 探索THRAP3作为AML的潜在治疗点.
主要方法:
- 在AML患者的THRAP3表达分析.
- 在体外和体内研究涉及THRAP3敲击和过度表达在AML细胞和小鼠模型.
- 评估铁灭诱导,铁积累和谷氨 (GSH) 合成.
- 研究THRAP3与SLU7同类物,拼接因子 (SLU7) 的相互作用及其在GIT ArfGAP 2 (GIT2) Exon14跳转中的作用.
主要成果:
- 在小鼠中,THRAP3 knockdown抑制了AML细胞增殖和瘤生长.
- 通过抑制铁的积累和促进GSH合成,THRAP3过度表达增强了AML细胞对铁的抵抗力.
- THRAP3 便于 GIT2 跳过 Exon14 通过 SLU7 招募.
- 抑制GIT2Exon14跳转逆转了THRAP3诱导的铁灭抵抗.
结论:
- 在AML细胞中,THRAP3促进铁灭性抵抗.
- THRAP3通过与SLU7相互作用来调解铁灭菌耐药性,从而诱导GIT2的Exon14跳转.
- 在AML中,THRAP3代表了一个潜在的治疗标,用于克服AML中的ferroptosis耐药性.
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