通过IMiD独立的指域准转录因子
Bee Hui Liu1, Miao Liu2, Sridhar Radhakrishnan1
1Cancer Science Institute of Singapore, Singapore, 117599, Singapore.
EMBO molecular medicine
|May 14, 2025
概括
研究人员发现了SH6,一种降解SALL4蛋白的新型化合物,为针对SALL4表达癌症提供了一种新策略,这种策略与传统免疫调节性伊米德药物 (IMiD) 独立. 这一突破在临床前模型中显示出显著的瘤生长抑制.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 免疫调节性伊米德药物 (IMiDs) 向C2H2指蛋白,但对SALL4驱动的癌症无效,尽管SALL4含有IMiD降解.
- SALL4是一种关键的癌症驱动蛋白,具有多个C2H2指集群.
研究的目的:
- 通过准SALL4.4的非IMiD领域来开发SALL4表达癌症的新疗法.
- 为了识别和描述一种新的化合物,可以选择性地降解SALL4蛋白.
主要方法:
- 使用ZFC4-DNA晶体结构和in silico对接来选化学库.
- 进行了细胞活力测定和涉及蛋白质降解途径的机制研究 (CUL4A/CRBN).
- 在SALL4+患者衍生异种移植和药理动力学研究中评估化合物疗效.
主要成果:
- 发现SH6,一种选择性向SALL4表达癌细胞的化合物.
- SH6通过CUL4A/CRBN通路调解SALL4蛋白质的降解;ZFC4的删除取消了这种效应.
- 在异种移植中,SH6表现出87%的瘤生长抑制和有利的生物可用性.
结论:
- 介绍了一种新的,IMID独立的药物发现方法,针对C2H2转录因子,如SALL4.
- SH6代表了对SALL4驱动癌症的有前途的治疗候选者.
- 突出了非IMiD域在癌症治疗的转录因子中的可药性.
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