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A Facile One-Pot Surfactant-Free Nanoprecipitation Method for the Preparation of Nanogels from Polyglycerol–Drug Conjugates that Can Be Freely Assembled for Combination Therapy Applications

机译:从聚甘油-药物缀合物制备纳米凝胶的简便一锅无表面活性剂的纳米沉淀方法可以为组合疗法应用自由组装

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摘要

A well-established strategy to treat drug resistance is the use of multiple therapeutics. Polymer-based drug delivery systems (DDS) can facilitate a simultaneous delivery of two or more drugs. In this study, we developed and synthesized a dendritic polyglycerol (PG) nanogel (NG) system that allows for free combination of different fixed ratios of active compound conjugates within a single NG particle. As a proof of concept, we synthesized NGs bearing the chemotherapeutic agent doxorubicin (DOX) and paclitaxel (PTX) in different ratios, as well as conjugated dye molecules. Our combination PG NGs were formed by simply mixing PG–drug/dye conjugates bearing free thiol groups with PG-acrylate in an inverse surfactant-free nanoprecipitation method. With this method we obtained PG-NGs in the size range of 110–165 nm with low polydispersity indices. Solubility of hydrophobic PTX was improved without the need for additional solubilizing agents such as polyethylene glycol (PEG). Interestingly, we found that our NGs made from PG-DOX conjugates have a high quenching efficiency for DOX, which could be interesting for theranostic purposes.
机译:一种成熟的治疗耐药性的策略是使用多种疗法。基于聚合物的药物输送系统(DDS)可以促进两种或多种药物的同时输送。在这项研究中,我们开发并合成了树状聚甘油(PG)纳米凝胶(NG)系统,该系统可在单个NG颗粒内自由组合不同固定比例的活性化合物结合物。作为概念的证明,我们合成了具有不同比例的化学治疗药物阿霉素(DOX)和紫杉醇(PTX)的NG,以及共轭染料分子。我们的PG NG组合是通过将带有游离硫醇基团的PG-药物/染料共轭物与PG-丙烯酸酯简单地以无表面活性剂的逆纳米沉淀法混合而形成的。通过这种方法,我们获得了110-165 nm范围内的PG-NG,具有低多分散指数。疏水PTX的溶解度得到了改善,而无需其他增溶剂,例如聚乙二醇(PEG)。有趣的是,我们发现我们的由PG-DOX共轭物制成的NG对DOX具有很高的猝灭效率,这对于治疗学目的可能是有趣的。

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