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对STAT3发现一种强效和选择性的PROTAC降解剂

Kefeng Wang¹, Yuxin Zheng¹, Wenli Mao¹

¹Department of Pharmacology, School of Medicine, Southern University of Science and Technology Shenzhen 518055 China wangyk@sustech.edu.cn.

RSC medicinal chemistry

|August 4, 2025

概括

研究人员开发了S3D5,一种新型的PROTAC,用于降解STAT3,一种促进癌细胞存活的蛋白质. 这种方法重新激活了p53通路,抑制了肝细胞癌细胞增殖,并提供了潜在的新型癌症治疗方法.

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:

信号传感器和转录3激活器 (STAT3) 和p53蛋白质在细胞存活和细胞亡中起着相反的作用.
STAT3的激活促进了癌细胞的生存,而p53的激活则诱导了亡.
STAT3对p53的抑制与瘤发育有关,使STAT3成为治疗点.

研究的目的:

设计和表征一种新型的化向嵌合体 (PROTAC) 来降解STAT3.
研究STAT3降解作为肝细胞癌 (HCC) 的治疗策略的潜力.
探索STAT3降解的机制及其对p53通路的影响.

主要方法:

设计和合成S3D5,一个基于BP-1-102的PROTAC,针对STAT3.
使用时间和剂量依赖性测试评估HepG2细胞中的STAT3降解.
通过ubiquitin-proteasome系统 (UPS) 调查降解机制.
评估S3D5对HCC细胞的抗增殖活性及其对p53通路激活的影响.

主要成果:

在HepG2细胞中,S3D5有效诱导了STAT3的时间和剂量依赖的降解.
证实S3D5的STAT3降解是由UPS介导的.
S3D5 显示出对HCC细胞具有显著的抗增殖活性.
S3D5的抗癌作用与p53通路的激活有关.

结论:

在研究STAT3功能方面,PROTAC是有价值的化学工具.
S3D5是一种强大的PROTAC,能够降解STAT3并重新激活p53通路.
S3D5显示出作为肝细胞癌的潜在治疗剂的前景.

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