Cyclic RGDs Modified Copolymeric Brush for Targeted Cellular Imaging and Drug Delivery

Heng-heng Ma; Rong-cui Jiang; Qu-li Fan; Wen-jun Wang; Wei Huang

doi:10.11777/j.issn1000-3304.2017.17006

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Cyclic RGDs Modified Copolymeric Brush for Targeted Cellular Imaging and Drug Delivery

Research Article | 更新时间：2021-01-26

- Cyclic RGDs Modified Copolymeric Brush for Targeted Cellular Imaging and Drug Delivery
- Acta Polymerica Sinica Issue 11, Pages: 1781-1788(2017)
- 作者机构：
  
  1.南京邮电大学有机电子与信息显示国家重点实验室培育基地信息材料与纳米技术研究院江苏先进生物与化学制造协同创新中心南京 210023
  2.聊城大学山东省光通信科学与技术重点实验室物理科学与信息工程学院聊城 252059
  3.南京工业大学江苏省柔性电子重点实验室先进材料研究院江苏先进生物与化学制造协同创新中心南京 211816
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2017.17006
  CLC：
- Published：20 November 2017，
  
  Received：7 January 2017，
  
  Revised：7 April 2017，
扫描看全文
Heng-heng Ma, Rong-cui Jiang, Qu-li Fan, Wen-jun Wang, Wei Huang. Cyclic RGDs Modified Copolymeric Brush for Targeted Cellular Imaging and Drug Delivery. [J]. Acta Polymerica Sinica (11):1781-1788(2017)
DOI：

Heng-heng Ma, Rong-cui Jiang, Qu-li Fan, Wen-jun Wang, Wei Huang. Cyclic RGDs Modified Copolymeric Brush for Targeted Cellular Imaging and Drug Delivery. [J]. Acta Polymerica Sinica (11):1781-1788(2017) DOI： 10.11777/j.issn1000-3304.2017.17006.

摘要

以具有丰富接枝侧链的阴离子型共轭聚合物分子刷PFPANa为材料，通过简单的一步修饰法在聚合物的部分接枝侧链上引入靶向配体分子c（RGDyK），并利用分子刷侧链上未修饰配体分子的羧基负离子与抗癌药物DOX静电结合，制备了基于分子刷型共轭聚合物的靶向细胞成像和载药系统.研究结果表明载药系统对DOX药物的载药量可达13.3 wt%，体外细胞实验研究结果表明该载药系统可实现对肿瘤细胞的靶向选择性成像，并显著促进了肿瘤细胞对DOX药物的摄取，具有良好的抗肿瘤细胞生长效果，显著提高了药物运输效率.

Abstract

The anionic molecular brush conjugated polyelectrolyte PFPANa with a lot of grafted side chains was used in this work. Considering the special molecule structure and advanced photophysical properties of molecular brush conjugated polymer PFPANa

the single-step modification of the targeted functional molecules peptides including Arg-Gly-Asp in part of side chains of polymer PFPANa through covalent linkage was completed and the targeted brush copolymer PFPARGD was prepared. Then the anti-cancer drug DOX was electrostatically combined to polymer PFPARGD as a result of the abundant negative charged carboxyl groups in the remained side chains

and the final combined system for targeted imaging and drug delivery based molecular brush conjugated polymer was prepared. The UV-Vis absorption spectra and the zeta potentials of the polymer before and after modified were measured and the results proved the successfully covalent bonding of cyclic peptides c(RGDyK) to the grafted side chains of PFPANa. The experimental results of the fluorescence quenching assay by the positively charged anti-cancer drug DOX showed that the drug delivery system could still loading about 13.3 wt% DOX even after modification. The cell culture experiments

in vitro

and the MTT assay in NIH-3T3 cells showed no significant toxicity of the modified polymer PFPARGD. For targeted imaging

the modified polymer PFPARGD was added in both cancer cell and normal cell culture experiments and the laser scanning confocal microscopy images showed that the introduction of targeting ligand c(RGDyK) to the polymer helped to achieve selective recognition of the tumor cells and targeted imaging. The results of flow cytometry showed that the drug delivery system significantly promoted cellular uptake of drug and also showed a good effect of anti-tumor cell growth. This work would provide a new simple strategy for the brush copolymers application in biological drug delivery and molecular imaging of multi-functional system in the future.

关键词

精氨酰-甘氨酰-天冬氨酸分子刷型共轭聚合物细胞成像药物运输

Keywords

Arg-Gly-AspBrush-like conjugated polymersCellular imagingDrug delivery

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State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University

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