溶解融合蛋白凝结物以逆转异常基因表达
Hazheen K Shirnekhi1, Bappaditya Chandra1, Richard W Kriwacki1,2
1Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee.
Cancer research
|October 13, 2023
概括
癌症融合蛋白质形成异常的凝聚物,驱动疾病. 一个新的屏幕确定了像LY2835219这样的化合物,通过促进 lysosome 形成来溶解这些致癌凝聚物,从而提供了一个治疗策略.
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:
- 许多与癌症相关的融合蛋白具有共同的结构:一个N端相分离易发生的区域 (PS) 和一个C端DNA结合域 (DBD).
- 这种PS-DBD拓类似于转录因子,这表明这些融合可能通过相位分离形成异常的转录凝聚物来驱动癌症.
研究的目的:
- 调查相分离在PS-DBD融合蛋白的瘤功能中的作用.
- 为了确定能够溶解这些异常凝结物的化合物,并逆转其致癌效应.
主要方法:
- 高通量选使用时间延迟,高含量成像来识别凝结溶解化合物.
- 细胞凝聚剂测定和转录基因数据分析以验证发现.
- 研究化合物机制,包括对溶酶体形成的影响.
主要成果:
- 与癌症相关的融合蛋白中的很大一部分表现出PS-DBD拓,形成异常的凝结物.
- 一个高通量屏幕识别了114种化合物,可以溶解由FUS::ERGmut.形成的冷凝物.
- LY2835219从FUS::ERGmut和EWS::FLI1中溶解的凝聚物,通过促进溶酶体的形成和逆转由EWS::FLI1.1驱动的异常基因表达.
结论:
- 通过PS-DBD融合形成异常的凝析物可能在瘤发生过程中起作用.
- 机械无偏查可以识别调节融合蛋白驱动凝聚物的化合物.
- LY2835219证明了治疗这些凝聚物的原则证明,尽管其特定的向机制需要进一步阐明.
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