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.
Coumarin-derived azolyl ethanols: synthesis, antimicrobial evaluation and preliminary action mechanism
found that compound 14 could interact with calf thymus DNA by groove binding to form 14-DNA complex via both hydrogen bonds and van der Waals force, which might be the factor to exert the powerful antimicrobial activity.
方便地合成了一系列香豆素衍生的偶氮基乙醇,包括咪唑基,三唑基,四唑基,苯并三唑基,巯基-咪唑基和巯基-三唑基,并通过IR,1 H NMR,13 C NMR和高分辨率质谱(HRMS)光谱进行了表征。。一些制备的化合物显示出适当的logPow值以及有效的抗菌和抗真菌活性。值得注意的是,化合物14双三唑基乙醇基团对MRSA的最低最低抑菌浓度(MIC)值低至8 mg / mL,与参考药物诺氟沙星(MIC = 8 mg / mL)和氯霉素(MIC = 16 mg / mL)相当甚至更好)。与氟康唑相比,它还可以有效抑制被测真菌菌株的生长。通过UV-Vis吸收和荧光光谱研究香豆素14与小牛胸腺DNA的进一步结合研究。发现化合物14可以通过氢键和范德华力通过凹槽结合与小牛胸腺DNA相互作用而形成14 -DNA复合物,这可能是发挥强大的抗菌活性的因素。