BET 主体退化破坏了RNA Pol2 集群的功能,但并没有破坏RNA Pol2 集群的3D形成
Diana H Chin1, Issra Osman1, Jadon Porch1
1Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
Pharmaceuticals (Basel, Switzerland)
|June 1, 2023
概括
用抑制剂或降解剂向BRD4,这是融合阳性狂宫肌肉瘤 (FP-RMS) 的关键因素,可以降低瘤生长. 这种方法对治疗这种侵袭性儿科癌症充满希望.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 聚变阳性狂宫肌肉瘤 (FP-RMS) 是由PAX3-FOXO1 (P3F) 转录因子驱动的.
- P3F产生超级增强剂,驱动核心调控转录因子 (CRTF) 的转录.
- 同调节因子BRD4识别了乙化溶酶,并被招募到超级增强剂中.
研究的目的:
- 研究BRD4在FP-RMS转录中的作用.
- 评估FP-RMS中BRD4抑制或降解的治疗潜力.
- 探索BRD4对RNA聚合酶II (Pol2) 循环的作用机制.
主要方法:
- 使用的BRD4抑制剂和降解剂 (ARV-771,BMS-986158).
- 评估了全球转录,CRTF下调和Pol2循环.
- 测试了BMS-986158在FP-RMS.的 ортотоп患者衍生异种移植 (PDX) 鼠标模型中.
主要成果:
- 抑制/降解BRD4导致全球转录减少和选择性下调CRTFs.
- ARV-771停止了转录,同时保留了Pol2循环,并影响了超过CRTF转录终端站点的Pol2.
- 在FP-RMS PDX模型中,BMS-986158在体内耐受良好,并减少了瘤大小.
结论:
- BRD4是FP-RMS中转录的关键驱动因素.
- 用抑制剂或降解剂向BRD4是一种可行的FP-RMS治疗策略.
- 在超级增强剂中,BRD4可能在调节Pol2循环中发挥着新的作用.
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