Anticancer drug doxorubicin (DOX) was loaded into the micelles during the process of micelle formation. Photo-cross-linked micelles showed slower drug release and cellular uptake in comparison with the uncross-linked micelles. And both DOX-loaded micelles displayed pH-sensitive release behaviours. Moreover, the DOX-loaded photo-cross-linked micelles exhibit comparative anticancer efficacy as free DOX
为了提高胶束的稳定性并减少负载药物的爆炸释放,通过两亲性聚醚醚(PEAC)上香豆素部分的光二聚化制备了光交联的胶束。通过傅立叶变换红外光谱(FTIR),紫外可见光谱(UV-vis),1 H NMR和13确认所获得的单体和聚合物的结构。1 H NMR(核磁共振,NMR)。PEAC可以通过直接分散在具有疏水香豆素芯和亲水性聚乙二醇(PEG)壳的水中而自组装成胶束。PEAC胶束的光交联过程通过紫外可见光谱法进行监测。通过透射电子显微镜(TEM)和动态光散射(DLS)表征了胶束的形态和尺寸分布。在胶束形成过程中,将抗癌药阿霉素(DOX)装入胶束中。与未交联的胶束相比,光交联的胶束显示出较慢的药物释放和细胞吸收。而且两个DOX加载的胶束都显示出pH敏感的释放行为。此外,负载DOX的光交联胶束作为游离DOX具有相对的抗癌功效。
Synthesis and bioactive evaluation of a novel series of coumarinazoles
A series of novel coumarinazoles were designed, synthesized, and characterized by IR, NMR, MS and HRMS spectra. The bioactive assay for the newly prepared compounds against six bacteria and five fungi manifested that most new compounds exhibited good or even stronger antibacterial and antifungal activities in comparison with reference drugs Chloromycin, Norfloxacin and Fluconazole. Bis-azole alcohols 7a and 7d-e showed better anti-Candida utilis activity than mono-azole derivatives 4a and 4d-e at the tested concentrations, and they were more potent than the clinical Fluconazole. While triazole alcohol 7a gave comparable anti-Candida albicans and anti-Candida mycoderma activity to Fluconazole and better anti-MRSA activity than mono-triazole one 4a and clinical Norfloxacin. 1H-Benzoimidazol-2-ylthio coumarin derivatives 4e and 7e gave the strongest anti-Escherichia coli JM109 efficacy. Oxiran-2-ylmethoxy moiety was found to be a beneficial fragment to improve antibacterial and antifungal activity to some extent. (C) 2014 Elsevier Ltd. All rights reserved.