Synthesis and Evaluation of Hydrophilic Linkers for Antibody–Maytansinoid Conjugates
作者:Robert Y. Zhao、Sharon D. Wilhelm、Charlene Audette、Gregory Jones、Barbara A. Leece、Alexandru C. Lazar、Victor S. Goldmacher、Rajeeva Singh、Yelena Kovtun、Wayne C. Widdison、John M. Lambert、Ravi V. J. Chari
DOI:10.1021/jm2002958
日期:2011.5.26
SPDB and SMCC linkers used earlier without triggering aggregation or loss of affinity of the resulting conjugate. Antibody–maytansinoid conjugates (AMCs) bearing these sulfonate- or PEG-containing hydrophilic linkers were, depending on the nature of the targeted cells, equally to more cytotoxic to antigen-positive cells and equally to less cytotoxic to antigen-negative cells than conjugates made with SPDB
描述了亲水性异双功能交联剂的合成和生物学评估,用于抗体与高细胞毒性剂的缀合。这些连接基除具有胺反应性N以外,还包含带负电荷的磺酸盐基团或亲水,不带电荷的PEG基团。-羟基琥珀酰亚胺(NHS)酯和巯基反应性末端。这些亲水性接头能够使疏水性有机分子药物(例如美登木素生物碱)以比之前使用的疏水性SPDB和SMCC接头更高的药物/抗体比(DAR)进行缀合,而不会引发聚集或丧失所产生的偶联物的亲和力。取决于靶细胞的性质,带有这些含磺酸盐或PEG的亲水性接头的抗体-类美登素偶联物(AMC)与制备的偶联物相比,对抗原阳性细胞的细胞毒性更高,对抗原阴性细胞的细胞毒性更低与SPDB或SMCC接头结合使用,因此通常显示出更宽的选择性窗口,尤其是针对体外的多药耐药(MDR)癌细胞系和体内的肿瘤异种移植模型。