Design and synthesis of peptide conjugates of phosphoramide mustard as prodrugs activated by prostate-specific antigen
作者:Xinghua Wu、Longqin Hu
DOI:10.1016/j.bmc.2016.04.035
日期:2016.6
stability of the conjugates while the position of substitution affected differently the self-immolative process of conjugates upon proteolysis. Introduction of a fluorine at ortho position to benzylic phosphoramide as in 1b results in better stability of the conjugate prior to activation while maintaining its antiproliferative activity upon activation by PSA. The conjugate 1b with 2-fluoro substitution was
设计并合成了一系列Glutaryl-Hyp-Ala-Ser-Chg-Gln-4-氨基苄基磷酰胺芥末共轭物(1a – e),作为PSA在前列腺癌细胞中进行位点特异性激活的潜在前药。发现所有缀合物都是PSA的底物,在Gln和对氨基苄基(PAB)接头之间发生裂解。对这些结合物的结构-活性关系研究表明,在PAB接头的苯环上引入吸电子的氟均匀地改善了结合物的化学稳定性,而取代位置对结合物的自焚过程产生了不同的影响。蛋白水解。在邻位引入氟如在1b中对苄基磷酰胺的位置导致缀合物在活化之前具有更好的稳定性,同时在被PSA活化时保持其抗增殖活性。具有2-氟取代基的缀合物1b被确定为在前列腺癌靶向前药开发中进行进一步评估和优化的有前途的先导。