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Polymer-coated mesoporous silica nanoparticles for the controlled release of macromolecules

机译:高分子包覆的介孔二氧化硅纳米粒子用于大分子的控制释放

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摘要

With the goal of achieving constant release of large biological molecules over an extended period of time we focused on hybrid inorganic/organic nanoparticles. We synthesized poly(ethylene glycol) (PEG)-coated mesoporous silica nanoparticles (MSNs) with incorporated trypsin inhibitor (TI), a model protein molecule for growth factors. Due to the goal of incorporating large protein molecules the pore size of the as-synthesized MSNs was expanded by a hydrothermal treatment prior to TI incorporation. In vitro release from the MSNs without the thin polymer film shows an initial burst followed by continuous release. In the case of polymer-coated MSNs the initial burst release was completely suppressed and approximate zero order release was achieved for 4 weeks.
机译:为了在较长的时间内实现大型生物分子的恒定释放,我们专注于无机/有机杂化纳米粒子。我们合成了聚乙二醇(PEG)涂层的中孔二氧化硅纳米粒子(MSNs),并结合了胰蛋白酶抑制剂(TI),胰蛋白酶抑制剂是生长因子的模型蛋白分子。由于掺入大蛋白分子的目标,因此在掺入TI之前,先通过水热处理扩大了合成MSN的孔径。在没有聚合物薄膜的情况下,MSN的体外释放显示出最初的爆发,随后是连续释放。在聚合物包衣的MSN的情况下,最初的突释被完全抑制,并且在4周内实现了大约零级释放。

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