摘要
α-(8-喹啉氧基)单取代酞菁锌(α-(8-QLO)PcZn)是一种疏水性新型光敏剂,利用二嵌段MePEG-b—PCL聚合物纳米胶束作为药物载体,制备了包载α-(8-QLO)PcZn的MePEG—b-PCL聚合物纳米胶束(简称α-(8-QLO)PcZn胶束),实验研究了它的基本光物理和光生物特性。结果表明:α-(8-QLO)PcZn胶束在水溶液中的吸收和荧光光谱与自由药物α-(8-QLO)PcZn在DMF(N,N-二甲基甲酰胺)中的吸收和荧光光谱基本相似;α-(8-QLO)PcZn胶束的平均药物包载效率为(53.07±0.74)%,胶束平均粒径为(79.6±7.8)nm;α-(8-QLO)PcZn胶束能够很好地被鼻咽癌细胞C666-1所吸收,且主要分布在细胞核的周围。MePEG-b-PCL胶束是疏水性新型光敏剂α-(8-QLO)PcZn的一种有效传输系统。
α-(8-quinolinoxy) zinc phthalocyanine (α-(8-QLO) PcZn) is a promising new hydrophobic photosensitizer for photodynamic therapy (PDT). The aim of this study was to formulate hydrophobic α-(8-QLO) PcZn with MePEG-b- PCL (methoxypolyethylene glycol-block-polycaprolactone) diblock copolymer. The results indicated that the absorption and fluorescence spectra of α-(8-QLO) PcZn micelles in aqueous solution are very similar to that of free α-(8-QLO) PcZn in DMF respectively. The α-(8-QLO) PcZn micelles have a loading efficiency of 53.07 % and a narrow size distribution with a mean diameter around (79.6 ± 7.8 ) nm. Moreover, the α-(8-QLO) PcZu micelles can be readily absorbed by human nasopharyngeal carcinoma cell line C666-1, which have a diffuse cytoplasmic distribution in the preinuclear area. These data suggested that α-(8-QLO) PcZn-containing MePEG-b-PCL micelles may represent a useful formulation of the photosensitizer for PDT application.
出处
《激光生物学报》
CAS
CSCD
2009年第3期409-413,共5页
Acta Laser Biology Sinica
基金
福建省自然科学基金重点项目(2008J0001)
福建省教育厅重点科技项目(JA08031)