开发双FLT3和CHK1 PROTACs用于AML的治疗
Xuanmin Lian1, Yue Gao2,3, Wenjing Du1
1Institute of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, Zijingang Campus, Hangzhou 310058, P. R. China.
Journal of medicinal chemistry
|October 3, 2025
概括
针对FLT3和CHK1的新型蛋白质分解向嵌合体 (PROTACs) 克服了急性髓性白血病 (AML) 的抗性. 化合物A28降解FLT3和CHK1,抑制AML的生长,并在临床前模型中抑制瘤.
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:
- 由于对FLT3抑制剂 (FLT3i) 的获得性和适应性耐药性,急性髓性白血病 (AML) 的治疗面临挑战.
- 针对蛋白质分解的嵌合体 (PROTACs) 代表了药物发现的新疗法策略,特别是针对AML中的FLT3突变.
- 以前的研究表明,共同准FLT3和CHK1可以调节p53和c-Myc水平,可能克服适应性抵抗.
研究的目的:
- 设计和评估新的双FLT3 / CHK1 PROTACs,以克服AML中的抗性.
- 评估最佳化合物A28在降解标蛋白,抑制信号通路和调节关键蛋白水平 (p53,c-Myc) 中的有效性.
- 在AML模型中调查A28在克服获得和适应性耐药机制方面的潜力.
主要方法:
- 双FLT3/CHK1 PROTACs的设计和合成.
- 通过化合物A28.1评估FLT3和CHK1的蛋白酶依赖性降解.
- 对FLT3信号抑制,p53上调和c-Myc下调的评估.
- 使用MV-4-11皮下异种移植模型进行体内疗效研究,以评估瘤生长抑制.
主要成果:
- 最优的化合物A28有效地以蛋白质酶依赖的方式降解FLT3和CHK1.
- A28显示强烈抑制FLT3信号,导致p53水平上调和c-Myc水平下调.
- A28显示出克服既获得的,又适应性抵抗机制的潜力.
- 在临床前的AML模型中,每周静脉注射A28导致持续的瘤生长抑制.
结论:
- 双FLT3 / CHK1 PROTACs,以A28为例,为AML提供了一个有希望的治疗方法.
- A28有效地准FLT3和CHK1,调节关键信号通路和蛋白质水平,以打击AML耐药性.
- A28在抑制AML瘤生长方面表现出显著的临床前疗效,突出其作为新型AML治疗的潜力.
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