过氧化可诱导的PROTAC用于癌细胞中向蛋白质降解
Dehao Yu1, Heli Fan1, Zhili Zhou2
1Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, The Province and Ministry Co-sponsored Collaborative Innovation Center, for Medical Epigenetics, Tianjin Medical University, Tianjin, 300070, China.
Chembiochem : a European journal of chemical biology
|July 18, 2023
概括
新的蛋白质溶解向化马体 (PROTACs) 在癌细胞中被过氧化 (H2O2) 激活. 这种针对性蛋白质降解策略提高了选择性,并减少了正常细胞中的毒性.
科学领域:
- 化学生物学 化学生物学
- 药物发现 药物发现 药物发现
- 分子生物学分子生物学
背景情况:
- 向蛋白解酶的嵌合体 (PROTACs) 提供了一种通过ubiquitin-proteasome系统进行向蛋白质降解的方法.
- 目前的PROTAC由于选择性差,面临宿主毒性的挑战.
- 可诱导的PROTAC增强了特异性,但在深层组织激活方面面临限制.
研究的目的:
- 开发用于氧化 (H2O2) 诱导的新型PROTAC前体,用于向蛋白质降解.
- 通过利用癌细胞内源性H2O2水平来提高PROTACs的选择性.
- 研究H2O2依赖的PROTACs在癌症治疗中的潜力.
主要方法:
- 设计和合成可诱导H2O2的PROTAC前体 (2/5).
- 使用H2O2响应的光探针 (3) 来描述癌细胞中的H2O2水平.
- 采用西方斑点测试和细胞毒性实验来评估PROTAC的疗效和选择性.
主要成果:
- H2O2可诱导的PROTAC前体 (2/5) 在癌细胞中有效降解向蛋白质 (BRD4,ER).
- 与正常细胞相比,PROTAC前体2在富含H2O2的癌细胞 (A549,H1299) 中表现出增强的马素含蛋白4 (BRD4) 降解和细胞毒性.
- 对于BRD4和雌激素受体 (ER) 目标,H2O2依赖的降解机制得到了验证.
结论:
- 建立了一个针对H2O2依赖的向蛋白质降解的新策略.
- 这种方法通过利用癌细胞和正常细胞之间的H2O2度差异显著提高了PROTAC的选择性.
- 可诱导H2O2的PROTAC有望开发出更安全,更有效的癌症治疗方法.
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