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第44卷第3期 南京医科大学学报(自然科学版)
2024年3月 Journal of Nanjing Medical University(Natural Sciences) ·329 ·
·基础研究·
基于可降解两性离子聚碳酸酯纳米胶束的设计合成及其血液
长循环研究
张 平 ,徐云燕 ,陈 莹 ,王 可 ,陈 维 ,张庆明 1*
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东部战区总医院药剂科,江苏 南京 210002;中国药科大学工学院,江苏 南京 210009
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[摘 要] 目的:为了克服传统纳米药物稳定性差、血液循环时间短和免疫原性等问题,设计制备了拥有良好稳定性和非特异
蛋白质抗性的两性离子纳米药物载体。方法:通过开环聚合和Michael加成后聚合修饰设计并合成一种可生物降解的羧酸甜
菜碱型两性离子功能化聚碳酸酯共聚物 PAC(TCB),采用溶剂交换法制备得到尺寸为 160 nm 的胶束。结果:细胞摄取和毒
性实验结果表明,PAC(TCB)胶束具有肿瘤细胞摄取效率高、生物相容性好的优点;溶血和体内血液循环实验结果显示,
PAC(TCB)胶束具有低免疫原性和长循环特性,且多次注射后不会产生抗体。结论:可生物降解的两性离子功能化聚碳酸酯
作为纳米载体在体内药物递送领域具有巨大潜力。
[关键词] 两性离子聚碳酸酯;低免疫原性;抗蛋白吸附;长循环;药物递送
[中图分类号] R967 [文献标志码] A [文章编号] 1007⁃4368(2024)03⁃329⁃07
doi:10.7655/NYDXBNSN230742
Study on long blood ⁃ circulation of nano ⁃ micelles based on biodegradable zwitterionic
polycarbonate
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ZHANG Ping ,XU Yunyan ,CHEN Ying ,WANG Ke ,CHEN Wei ,ZHANG Qingming 1*
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1 Department of Pharmacy,General Hospital of Eastern Theater Command of PLA,Nanjing 210002;College of
Engineering,China Pharmaceutical University,Nanjing 210009,China
[Abstract] Objective:To overcome the drawbacks of traditional nanomedicines with a poor stability,a short blood circulation,and a
high immunogenicity,a novel zwitterionic nano⁃vector with sterling stability and non⁃specific protein resistance were designed and
prepared. Methods:A biodegradable carboxybetaine(CB)⁃modified polycarbonate[PAC(TCB)]was designed and synthesized by ring⁃
opening polymerization and Michael addition reaction,which can form the micelles of around 160 nm via a solvent displacement
method. Results:Cellular uptake and cytotoxicity experiments demonstrated that PAC(TCB)micelles possessed the superior
characteristics of an efficient cell internalization,and an excellent biocompatibility. The hemolysis assay and in vivo pharmacokinetic
experiments confirmed that PAC(TCB)micelles led to a low immunogenicity,a prolonged blood circulation and a negligible antibody
effect after repeated injections. Conclusion:The biodegradable zwitterionic⁃functionalized polycarbonate displays a colossal potential
as the nano⁃vector in drug delivery.
[Key words] zwitterionic polycarbonate;low immunogenicity;protein⁃adsorption resistance;long blood circulation;drug delivery
[J Nanjing Med Univ,2024,44(03):329⁃335]
纳米载体递送化疗药物在肿瘤治疗领域具有 高药物在体内的靶向分布,增加药物生物利用度;
独特优势:增强难溶性药物的溶解度和稳定性;提 减少药物不良反应。然而,纳米递送系统在肿瘤治
疗过程中仍然存在不足之处:纳米颗粒在进入体内
血液循环时易被单核吞噬系统清除;同时在进入体
[基金项目] 国家自然科学基金(52173294)
内后,纳米粒子表面会被血液中复杂的蛋白成分所
∗
通信作者(Corresponding author),E⁃mail:zhangqingming025@
163.com 吸附,导致“蛋白冠”的形成,使纳米粒子的稳定性