Facile synthesis and polymerization of 1,4,5-oxadithiepan-2-one for disulfide-based redox-responsive drug delivery
作者:Debojit Chakraborty、Anindita Sengupta、Jayanta Bhattacharyya、Josemon Jacob
DOI:10.1016/j.polymer.2024.126920
日期:2024.4
Korsmeyer-Peppas model suggests a Fickian diffusion as well as chain-relaxation controlled drug release process. DOX loaded micelles and free DOX displayed similar cytotoxicity towards both 4T1 and MCF-7 cells indicating that the encapsulation inside the micelle did not affect the anticancer efficacy of the drug. The drug loaded micelle showed higher cellular uptake than free DOX in both 4T1 and MCF-7 lines
化疗药物已被证明有望用于治疗肿瘤,但它们也存在一些缺点,包括水溶性低、非特异性和血浆稳定性差。因此,它们会积聚在健康器官中并产生多种不利影响。带有氧化还原响应二硫键的药物封装的刺激响应纳米颗粒已成为解决这些限制的有前途的递送载体。开发了一种基于聚乙二醇甲醚(PEGME)和聚二硫醚(PDS)二嵌段共聚物的谷胱甘肽(GSH)响应性二硫键药物递送系统。含有二硫键的环内酯,1,4,5-oxadithiepan-2-one,是利用溴乙酸2-溴乙酯与二硫化钠的反应,采用无硫醇方法制备的。在 Sn(oct)2 存在下,使用 1-丁醇对 1,4,5-oxadithiepan-2-one 进行开环聚合 (ROP),生成均聚物 PDS,而当 PEGME 聚合时,得到二嵌段共聚物 PEGME-b-PDS。用作大分子引发剂。在水溶液中,PEGME-b-PDS 自组装成球形胶束,通过场发射扫描电子显微镜 (FESEM)