连接器
有效载荷(计算)
结合
化学
组合化学
抗体-药物偶联物
体内
药物输送
生物物理学
单克隆抗体
抗体
计算机科学
生物
有机化学
免疫学
生物技术
数学分析
数学
操作系统
计算机网络
网络数据包
作者
Xiaoyi Li,Nimit L. Patel,Joseph D. Kalen,Martin J. Schnermann
标识
DOI:10.1002/anie.202417651
摘要
Abstract Targeted payload delivery strategies, such as antibody‐drug conjugates (ADCs), have emerged as important therapeutics. Although considerable efforts have been made in the areas of antibody engineering and labeling methodology, improving the overall physicochemical properties of the linker/payload combination remains an important challenge. Here we report an approach to create an intrinsically hydrophilic linker domain. We find that benzyl α‐ammonium carbamates (BACs) undergo tandem 1,6–1,2‐elimination to release secondary amines. Using a fluorogenic hemicyanine as a model payload component, we show that a zwitterionic BAC linker improves labeling efficiency and reduces antibody aggregation when compared to a commonly used para ‐amino benzyl (PAB) linker as well as a cationic BAC. Cellular and in vivo fluorescence imaging studies demonstrate that the model payload is specifically released in antigen‐expressing cells and tumors. The therapeutic potential of the BAC linker strategy was assessed using an MMAE payload, a potent microtubule‐disrupting agent frequently used for ADC applications. The BAC‐MMAE combination enhances labeling efficiency and cellular toxicity when compared to the routinely used PAB‐Val‐Cit ADC analogue. Broadly, this strategy provides a general approach to mask payload hydrophobicity and improve the properties of targeted agents.
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