本文描述了利用一种新型两性载体四己氧基四对氨基卡立[4]芳烃(A4C6)开发和优化纳米颗粒递送平台,用于抗癌药物紫杉醇的传递。
通过乳液蒸发法成功制备了纳米颗粒,其中有机相含有紫杉醇:A4C6(摩尔比1:10),通过探头超声将其分散到含有0.5% w/v聚乙烯醇稳定剂的水相中,pH值为4。
载药纳米颗粒的平均尺寸为78.7 ± 20.7 nm,表面电位为38.3 ± 7.67 mV,紫杉醇负载和包封效率分别为69.1 ± 5.3 µg药物/mg载体和50.4 ± 3.2%。透射电子显微镜照片显示离散的颗粒,没有凝聚的迹象。体外溶解实验显示,加入4%牛血清白蛋白的磷酸盐缓冲液中,分别在5、72和120小时释放的封装紫杉醇负荷量为32.7 ± 3.9%、82.6 ± 5.3%和91.0 ± 6.0%。
这是首次报道使用氨基取代的两性卡立芳烃封装抗癌药物。所制备的纳米颗粒明显小于Abraxane纳米颗粒,但具有可比较的药物载荷,有潜力实现紫杉醇对肿瘤组织的靶向传递。
Multi-head/multi-tail facial amphiphiles built on cyclodextrin (CD) and calixarene (CA) scaffolds are paradigmatic examples of monodisperse gene delivery systems.
Liposomes equipped at the outer membrane with positively charged calixarenes show improved efficiency in cargo delivery. This is facilitated by the interaction between the macrocycle units and heparan sulfate proteoglycans surrounding the cell.