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Fluorescent polymeric assemblies as stimuli-responsive vehicles for drug controlled release and cell/tissue imaging

机译:荧光聚合物组件作为刺激响应载体,用于药物控制释放和细胞/组织成像

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摘要

Polymer assemblies with good biocompatibility, stimuli-responsive properties and clinical imaging capability are desirable carriers for future biomedical applications. Herein, we report on the synthesis of a novel anthracenecarboxaldehyde-decorated poly(N-(4-aminophenyl) methacryl amide-oligoethyleneglycolmonomethylether methacrylate) (P(MAAPAC-MAAP-MAPEG)) copolymer, comprising fluorescent chromophore and acid-labile moiety. This copolymer can assemble into micelles in aqueous solution and shows a spherical shape with well-defined particle size and narrow particle size distribution. The pH-responsive property of the micelles has been evaluated by the change of particle size and the controlled release of guest molecules. The intrinsic fluorescence property endows the micelles with excellent cell/tissue imaging capability. Cell viability evaluation with human hepatocellular carcinoma BEL-7402 cells demonstrates that the micelles are nontoxic. The cellular uptake of the micelles indicates a time-dependent behavior. The H22-tumor bearing mice treated with the micelles clearly exhibits the tumor accumulation. These multi-functional nanocarriers may be of great interest in the application of drug delivery.
机译:具有良好生物相容性,刺激响应特性和临床成像能力的聚合物组件是未来生物医学应用的理想载体。在这里,我们报道了一种新型的蒽甲醛修饰的聚(N-(4-氨基苯基)甲基丙烯酸酰胺-低聚乙二醇单甲基醚甲基丙烯酸酯)(P(MAAPAC-MAAP-MAPEG))共聚物的合成,该共聚物包括荧光发色团和酸不稳定部分。该共聚物可以在水溶液中组装成胶束,并显示出具有明确定义的粒径和狭窄的粒径分布的球形。胶束的pH响应特性已通过粒径变化和客体分子的受控释放进行了评估。固有的荧光特性使胶束具有出色的细胞/组织成像能力。用人类肝细胞癌BEL-7402细胞进行的细胞生存能力评估表明,该胶束是无毒的。胶束的细胞摄取表明时间依赖性行为。用胶束处理的带有H22肿瘤的小鼠明显表现出肿瘤蓄积。这些多功能纳米载体在药物递送的应用中可能非常感兴趣。

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