前药
结合
连接器
化学
阿霉素
药物输送
药品
体内
二硫键
组合化学
药理学
生物物理学
细胞毒性
体外
立体化学
生物化学
有机化学
化疗
酶
医学
半胱氨酸
生物
生物技术
外科
数学分析
计算机科学
数学
操作系统
作者
Yaoqi Wang,Xing Wang,Feiyang Deng,Nan Zheng,Yanqin Liang,Hua Zhang,Bing He,Wenbing Dai,Xueqing Wang,Qiang Zhang
标识
DOI:10.1016/j.jconrel.2018.04.019
摘要
Drug-drug conjugate nanoparticles (DDC NPs) is a potential method for overcoming poor solubility and nonspecific action in cancer therapy, which is based on its high drug loading efficiency and passive tumor-target properties. Our laboratory has prepared DOX-SS-DOX NPs based on disulfide-linked doxorubicin (DOX) drug-drug conjugate, which showed well physical stability and similar anti-tumor efficacy as liposomes. However, how structures of DDCs influence the self-assembling and anti-tumor efficacy is still seldom clarified and needs further investigation. Here, we discussed the role of linker types, length and linkage site in the NPs self-assembling and anti-tumor efficacy. A series of DOX prodrugs were prepared and all the prodrugs could self-assemble into NPs except DOX-SS-DOX (2), indicating the linker length played an important role during self-assembling process. The linkage sites and types of linker exhibited great influence on in vitro cytotoxicity and in vivo anti-tumor efficacy, particularly, modification on C-14 hydroxyl was more efficient for DOX release than on amino group. Besides, disulfide-bond was not cleaved and DOX-SH release did not occur in the metabolism process. The function of disulfide-bond was to enhance the release of DOX in the hydrolysis process. These findings is meaningful for effective prodrug NPs design for therapeutics.
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