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Development of nanoparticulate drug delivery systems based on thiolated poly(acrylic acid)

机译:基于硫醇化聚丙烯酸的纳米颗粒药物递送系统的开发

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In this study the preparation and stabilization of poly(acrylic acid)-cysteine nanoparticles and incorporation of a fluorescence marked model-compound was investigated. Nanoparticles were prepared by ionic gelation of a poly(acrylic acid)-cysteine conjugate with calcium chloride. Poly(acrylic acid)-cysteine nanoparticles display high cohesive properties due to a cross-linking process via calcium bridges in the core and the pervasive formation of disulphide bonds and were 139 ± 34 nm in size. Nanoparticles were loaded with FITC-dextrans (flourescein isothiocyanate-dextrans) of 4, 20 and 40 kDa molecular mass as model-compound via sonication method or via vibration method for 3 and 24 h. In vitro release studies showed an initial burst release followed by an extended release of model-compounds. The lower the molecular mass of the FITC-dextrans, the higher was the amount of incorporated and released model compounds. Vibration seems to be a proper method for the incorporation of hydrophilic and macromolecular drugs in poly(acrylic acid)-cysteine nanoparticles.
机译:在这项研究中,研究了聚(丙烯酸)-半胱氨酸纳米颗粒的制备和稳定性以及荧光标记的模型化合物的掺入。通过聚(丙烯酸)-半胱氨酸缀合物与氯化钙的离子凝胶化制备纳米颗粒。聚(丙烯酸)-半胱氨酸纳米颗粒由于通过核心中的钙桥的交联过程和二硫键的普遍形成而显示出高内聚性,并且尺寸为139±34 nm。通过声波法或通过振动法将3、4和20和40kDa分子量的FITC-葡聚糖(异丁烯酸异氟氰酸酯-葡聚糖)装载到纳米颗粒上作为模型化合物。体外释放研究表明,最初的突发释放随后是模型化合物的延长释放。 FITC-葡聚糖的分子量越低,掺入和释放的模型化合物的量就越高。振动似乎是将亲水性和大分子药物掺入聚(丙烯酸)-半胱氨酸纳米颗粒中的合适方法。

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