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Po-Chang Shih¹, Miyako Naganuma², Genichiro Tsuji³

¹Institute of BioPharmaceutical Sciences, National Sun Yat-sen University, Kaohsiung 804201, Taiwan; Graduate School of Pharmaceutical Sciences, The University of Tokyo, Japan.

Bioorganic & medicinal chemistry

|November 3, 2023

概括

有氧核酸头的PROTACs降解信号转换器和转录3 (STAT3) 的激活器. 一种新型的PROTAC,POM-STAT3,通过无素-蛋白酶体系统有效降解STAT3,显示出潜在的抗癌活性.

科学领域:

生物化学生物化学
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:

针对蛋白质溶解的嵌合体 (PROTAC) 技术正在彻底改变药物开发,目前有20多种PROTAC正在临床试验中.
有氧核酸头的PROTACs为降解像转录因子这样的DNA结合蛋白提供了一种新的方法.
信号转换器和转录3激活器 (STAT3) 是一种具有挑战性的标蛋白,涉及各种癌症.

研究的目的:

开发和评估一个以寡核酸为首的PROTAC,用于针对性降解STAT3.
研究由新型PROTAC介导的STAT3降解机制.
评估癌细胞中STAT3降解的治疗潜力.

主要方法:

一种针对STAT3的双链诱寡核酸与E3结合剂 (利多胺,VH032,LCL161) 的结合,以产生PROTACs.
用PROTAC POM-STAT3 (招募CRBN) 对NCI-H2087细胞进行处理,并评估STAT3降解.
使用杂乱的寡核酸,竞争性结合试验和无素-蛋白酶体系统的抑制剂,验证STAT3降解机制.

主要成果:

该PROTAC POM-STAT3通过招募E3结合酶CRBN.强烈诱导STAT3降解.
STAT3降解依赖于序列,并由无素-蛋白酶体系统介导.
POM-STAT3治疗显著降低了NCI-H2087细胞活力,表明了细胞杀伤性活性.

结论:

诱寡核酸头的PROTACs是降解具有挑战性的蛋白质点的有效工具,如STAT3.
POM-STAT3显示出强大的STAT3降解和显著的抗癌活性,突出其治疗潜力.
这种方法为向癌症转录因子在癌症治疗中提供了一个有希望的策略.

关键词:

降解剂治疗方法的降解剂.核酸是核酸中的一种.这就是PROTAC.蛋白质酶是一种蛋白质酶.一个刺客,一个狙击手.在STAT3中,我们可以使用STAT3.有针对性的蛋白质降解降解.

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