拼接因子PTBP1与RUNX1相互作用,对于白血病细胞存活是必需的
Arjun Dhir1,2, Alexander Ethell1,2,3, Riley Watkins1,2
1Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA.
Leukemia
|November 10, 2025
概括
与Runt相关的转录因子1 (RUNX1) 与聚胺管结合蛋白1 (PTBP1) 相互作用,调节基因表达和RNA剪接. 这种相互作用通过控制代谢基因表达,对白血病细胞生存至关重要.
科学领域:
- 血液形成和白血病研究研究
- 分子生物学和基因组学
- 癌细胞的新陈代谢
背景情况:
- 与Runt相关的转录因子1 (RUNX1) 对血液形成至关重要,在白血病中经常发生突变.
- 基因组脱酸酶1 (HDAC1) 与RUNX1合作,但其在转录中的作用表明非基因组功能.
- 了解RUNX1复杂调节是解读白血病病原的关键.
研究的目的:
- 在白血病细胞中识别新的RUNX1相互作用伙伴.
- 解读这些合作伙伴在基因调节和RNA剪接中的作用.
- 研究RUNX1-伙伴相互作用对白血病细胞代谢和生存的功能影响.
主要方法:
- 蛋白质组学和基因组学用于识别RUNX1相互作用体.
- 长读转录学用于基因表达和拼接分析.
- 染色体分析以绘制全基因组的因子占用率图.
主要成果:
- 聚胺管结合蛋白1 (PTBP1) 被确定为RUNX1交互因子,依赖HDAC1.
- 在RUNX1和PTBP1与活性基因促进体结合的广泛的全基因组重叠.
- 失去PTBP1导致广泛的RNA剪接变化和共同结合的代谢基因的表达减少.
- 在AML细胞中,PTBP1耗尽减少了葡萄糖分解,葡萄糖吸收,并诱导了细胞死亡.
结论:
- 由HDAC1介导的RUNX1-PTBP1相互作用对于调节白血病中的代谢基因表达至关重要.
- 这个复合体控制了对白血病细胞增殖和生存至关重要的代谢途径.
- 针对RUNX1-PTBP1相互作用可能为白血病提供治疗策略.
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