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First step towards a model system of the drug delivery network based on amide-POSS nanocarriers

机译:迈向基于酰胺-POSS纳米载体的药物输送网络模型系统的第一步

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Among the varied and diverse family of drug delivery systems (DDSs), such as polymer–drug conjugates, polymeric micelles, dendrimers and molecular containers, polyhedral oligomeric silsesquioxanes (POSS) occupy a special position within the group of biocompatible drug carriers. The extraordinary recommendation of POSS for such systems derives from their three-dimensional structure, nanoscale size, low toxicity, and efficient cellular uptake. These conjugates can be strictly designed compared for instance to micelles, dendrimeric-drug or polymer/inorganic hybrid composites, in which the amount of therapeutics attached to the carrier is rather random, and there is a high probability that some of the drug molecules can be completely trapped inside the ramified structures. The combination of fully functionalized amide-POSS and pharmaceuticals might create a so-called sophisticated DDS. In such a system, the adsorbed drug molecules can be released under physiological conditions and then the POSS-based carrier will be hydrolyzed (at pH = 7.40) to a non-toxic carboxylic acid salt and a water soluble polyhedral oligomeric silsesquioxane containing an aminopropyl group that can be safely removed from the organism.
机译:在多种多样的药物递送系统(DDS)系列中,例如聚合物-药物结合物,聚合物胶束,树枝状聚合物和分子容器,多面体低聚倍半硅氧烷(POSS)在生物相容性药物载体组中占据特殊位置。 POSS对此类系统的非凡推荐来自其三维结构,纳米级尺寸,低毒性和有效的细胞摄取。与例如胶束,树枝状药物或聚合物/无机杂化复合物相比,可以对这些缀合物进行严格设计,其中与载体结合的治疗药物的数量相当随机,并且很可能某些药物分子是完全困在分叉的结构内部。完全功能化的酰胺-POSS与药物的结合可能会产生所谓的复杂DDS。在这样的系统中,可以在生理条件下释放吸附的药物分子,然后将基于POSS的载体水解(在pH = 7.40时)成无毒的羧酸盐和含有氨基丙基的水溶性多面体低聚倍半硅氧烷可以安全地从生物体中去除。

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