Design, Synthesis, and in Vitro Evaluation of Dipeptide-Based Antibody Minor Groove Binder Conjugates
作者:Scott C. Jeffrey、Michael Y. Torgov、Jamie B. Andreyka、Laura Boddington、Charles G. Cerveny、William A. Denny、Kristine A. Gordon、Darin Gustin、Jennifer Haugen、Toni Kline、Minh T. Nguyen、Peter D. Senter
DOI:10.1021/jm040137q
日期:2005.3.1
binder drugs (MGBs) attached to monoclonal antibodies (mAbs) through peptide linkers designed to release drugs inside the lysosomes of target cells. The site of linker attachment on the MGB was at the 5-position on the B-ring, since model studies showed that attachment of an electron-withdrawing group (i.e., acyl, carbamoyl) at this position increased the stability of the molecule. Because of the hydrophobic
制备了抗体-药物偶联物(ADC),该药物-偶联物由DNA小沟结合剂(MGB)组成,这些药物通过肽接头连接到单克隆抗体(mAb),肽接头设计用于在靶细胞的溶酶体内释放药物。MGB上连接子的连接位点在B环的5位,因为模型研究表明,吸电子基团(即酰基,氨基甲酰基)在此位置的连接增加了分子的稳定性。由于MGB的疏水性,需要采取多种措施来克服它们在结合后诱导mAb聚集的趋势。这在包含氨基-CBI药物1的一系列ADC中得到了例证。初始加合物是使用肽序列缬氨酸-瓜氨酸制备的,该肽序列附着于自消灭的对氨基苄基氨基甲酸酯间隔基上。生成的ADC被完全汇总。去除自消灭性间隔区,引入更具亲水性的缬氨酸-赖氨酸序列,并在mAb和肽之间引入四甘醇单元,导致结合物未聚集,甚至每个mAb多达八种药物。这些结果扩展到包括羟基氮杂-CBI药物2,该药物通过对氨基苄基醚自消灭性间隔基与缬氨酸-赖氨酸序列连接。所得的mAb偶联物