A novel bioresponsive self-immolative spacer based on aza-quinone methide reactivity for the controlled release of thiols, phenols, amines, sulfonamides or amides
作者:Elena Ermini、Annalaura Brai、Elena Cini、Federica Finetti、Giuseppe Giannini、Daniele Padula、Lucrezia Paradisi、Federica Poggialini、Lorenza Trabalzini、Paola Tolu、Maurizio Taddei
DOI:10.1039/d4sc01576b
日期:2024.4.24
stimulus. The spacer is based on the structure of (5-nitro-2-pyrrolyl)methanol (NPYM-OH), which was used for the direct alkylation of the functional groups mentioned above. The spacer is metabolically stable and has three indispensable sites for bioconjugation: the bioresponsive trigger, the conjugated 1,6 self-immolative system and a third arm suitable for conjugation with a carrier or other modifiers. Release
刺激敏感连接体是癌症治疗前药不可或缺的成分之一,因为它与药物共价结合,并在肿瘤部位受到外部刺激时将其释放。醌甲基化物消除已被广泛用作基于离核性释放药物的关键转化。通常的方法是将药物以氨基甲酸酯的形式与接头结合,并在自毁 1,6-消除后以游离胺的形式释放。尽管这种方法非常有效,但它仅限于胺(作为氨基甲酸酯)、醇或酚(作为碳酸酯)或其他酸性官能团。我们在这里报告了一种自焚间隔基,能够在还原刺激后直接连接和释放胺、酚、硫醇、磺酰胺和羧酰胺。该间隔基基于(5-硝基-2-吡咯基)甲醇(NPYM-OH)的结构,其用于上述官能团的直接烷基化。间隔物是代谢稳定的,并且具有三个不可或缺的生物缀合位点:生物响应触发器、缀合的1,6自焚系统和适合与载体或其他修饰物缀合的第三臂。通过在胶束水环境 (H 2 O/TPGS-750-M) 中选择性还原 Fe/Pd 纳米颗粒 (NP) 上的硝基,或通过 NADH 介导的硝基还原酶激活来实现释放。