应用化学 ›› 2023, Vol. 40 ›› Issue (6): 860-870.DOI: 10.19894/j.issn.1000-0518.220385

• 研究论文 • 上一篇    下一篇

苯硼酸选择性结合的pH响应脂质体用于药物递送

谢信涛1,2, 江桑铌1,2, 于喜飞1,2()   

  1. 1.中国科学院长春应用化学研究所,高分子复合材料工程实验室,长春 130022
    2.中国科学技术大学,合肥 230026
  • 收稿日期:2022-11-24 接受日期:2023-03-13 出版日期:2023-06-01 发布日期:2023-06-27
  • 通讯作者: 于喜飞
  • 基金资助:
    国家自然科学基金(21674109)

Selective Binding pH Responsive Liposomes with Phenylboronic Acid for Drug Delivery

Xin-Tao XIE1,2, Sang-Ni JIANG1,2, Xi-Fei YU1,2()   

  1. 1.Laboratory of Polymer Composites Engineering,Changchun Institute of Applied Chemistry,Chinese Academy of Science,Changchun 130022,China
    2.University of Science and Technology of China,Hefei 230026,China
  • Received:2022-11-24 Accepted:2023-03-13 Published:2023-06-01 Online:2023-06-27
  • Contact: Xi-Fei YU
  • About author:xfyu@ciac.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(21674109)

摘要:

通过取代反应和酯化反应合成了一端以酰胺键连接苯硼酸(PBA)另一端以酯键连接硬脂酸(SA)的聚乙二醇(PEG)的衍生物PBA-PEG-SA,并将之与二硬脂酰胆碱磷酸(DSCP)、胆固醇(CH)共组装制备了一种具有pH响应特性的脂质体(Lip)。研究表明,当m(PBA-PEG-SA)∶m(CH)∶m(DSCP)=1∶3∶10共组装时,所制备的脂质体的粒径为115 nm,在20 d内保持良好的粒径稳定性,并且具有良好的生物相容性,在质量浓度达到800 μg/mL时,小鼠胚胎成纤维细胞(NIH-3T3)和肝癌细胞(HepG2)的存活率皆可达到90%以上。同时,由于苯硼酸与果糖(Fru)的选择性结合,在负载阿霉素(Dox)后,与DSCP脂质体药物(Lip/Dox)相比,Fru/PBA/Lip/Dox脂质体可以有效增强对HepG2细胞的毒性,降低对正常细胞NIH-3T3的毒性,同时也改善了细胞对载药脂质体的内吞作用。因此,DSCP与PBA-PEG-SA共组装形成的脂质体,具有良好的pH响应性能以及增强脂质体在肿瘤组织的富集能力,在肿瘤治疗领域具有较好的应用前景。

关键词: pH响应, 苯硼酸, 共组装脂质体, 药物递送

Abstract:

A polyethylene glycol (PEG) derivative PBA-PEG-SA, which connects phenylboronic acid (PBA) with an amide bond at one end and stearic acid (SA) with an ester bond at the other end, is synthesized by substitution reaction and esterification reaction. And a liposome with pH response characteristics is prepared by co-assembly of PBA-PEG-SA with distearyl choline phosphate (DSCP) and cholesterol (CH). When PBA-PEG-SA, cholesterol and DSCP are assembled at a mass ratio of 1∶3∶10, the particle size of the prepared liposome is 115 nm, and it could maintain good particle size stability within 20 d. In addition, the liposome has good biocompatibility. When the concentration reaches 800 μg/mL, the survival rate of mouse embryonic fibroblast (NIH-3T3)and hepatoma cell (HepG2) can reach more than 90%. At the same time, after loading doxorubicin (Dox), compared with DSCP liposomes (Lip/Dox), Fru/PBA/Lip/Dox liposomes modified with PBA and coated with Fru can effectively enhance the cytotoxicity of HepG2, reduce the toxicity to normal cells NIH-3T3, and improve the endocytosis of cells to drug-loaded liposomes due to the selective binding of phenylboronic acid and fructose. Therefore, the liposomes co-assembled by DSCP and PBA-PEG-SA have good pH response performance and enhance the enrichment ability of liposomes in tumor tissue, which will have good application prospects in the field of tumor therapy.

Key words: pH response, Phenylboronic acid, Co-assembled liposomes, Drug delivery

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