A robust strategy for preparation of sequential stimuli-responsive block copolymer prodrugs via thiolactone chemistry to overcome multiple anticancer drug delivery barriers
作者:Wendong Ke、Wei Yin、Zengshi Zha、Jean Felix Mukerabigwi、Weijian Chen、Yuheng Wang、Chuanxin He、Zhishen Ge
DOI:10.1016/j.biomaterials.2017.11.006
日期:2018.2
which further react with poly(ethylene glycol)-block-poly(pyridyldisulfide ethylmethacrylate) (PEG-PDSEMA) to produce imidazole and disulfide bonds-incorporated BCPs. Taken paclitaxel (PTX) for example, PTX BCPs exhibited high drug-loading content (>50%) and low critical micellization concentration (5 × 10−3 g/L), which can self-assemble into micellar nanoparticles in aqueous solution with a small size
嵌段共聚物前药(BCP)由于自组装成定义明确的核-壳纳米颗粒以改善药代动力学,血液循环的稳定性而没有药物泄漏以及优化的生物分布,因此在纳米医学的临床翻译中引起了广泛的关注。然而,阻止药物特异性递送至肿瘤细胞的生理障碍的级联限制了最终的治疗功效。在本文中,我们报告了一种基于硫代内酯化学的稳健而简便的策略,以制造具有明确定义的BCP,并具有连续的肿瘤pH值促进细胞内在化和细胞内刺激反应性药物释放。通过一锅合成从临床使用的小分子抗癌药物中制备了一系列BCP。药物共轭硫代内酯的开环反应释放巯基经由通过氨解ñ - (3-氨基丙基) -咪唑,其进一步与聚(乙二醇)反应-嵌段-聚(甲基丙烯酸乙酯吡啶基二硫化物)(PEG-PDSEMA)以产生咪唑和二硫键并入过境点。以紫杉醇(PTX)为例,PTX BCP的载药量高(> 50%),临界胶束化浓度低(5×10 -3 g / L),可以在水溶液中自组装成胶束纳米颗粒。小尺寸(〜40
The synthesis of polymer–drug conjugates fromprodrug monomers consisting of a cyclic polymerizable group that is appended to a drug through a cleavable linker is achieved by organocatalyzed ring‐opening polymerization. The monomers polymerize into well‐defined polymer prodrugs that are designed to self‐assemble into nanoparticles and release the drug in response to a physiologically relevant stimulus
Design and Synthesis of a Nitrogen Mustard Derivative Stabilized by Apo-neocarzinostatin
作者:Michael D. Urbaniak、John P. Bingham、John A. Hartley、Derek N. Woolfson、Stephen Caddick
DOI:10.1021/jm040790d
日期:2004.9.1
were assessed. Chlorambucil did not benefit from conjugation. The melphalan conjugate (6) formed covalent DNA adducts at guanine bases and exhibited greater in vitro cytotoxic activity than unmodified melphalan. Fluorescence and NMR spectroscopy showed that 6 binds to apoNCS. Binding to apoNCS-protected 6 reduced the extent of hydrolysis of the conjugate. This novel approach demonstrates for the first