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Lysine-based polycation:heparin coacervate for controlled protein delivery

机译:基于赖氨酸的聚阳离子:肝素凝聚层,可控制蛋白质的输送

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摘要

Polycations have good potential as carriers of proteins and genetic material. However, poor control over the release rate and safety issues currently limit their use as delivery vehicles. Here we introduce a new lysine-based polycation, poly(ethylene lysinylaspartate diglyceride) (PELD), which exhibits high cytocompatibility. PELD self-assembles with the biological polyanion heparin into a coacervate that incorporates proteins with high loading efficiency. Coacervates of varying surface charge were obtained by simple alteration of the PELD:heparin ratio and resulted in diverse release profiles of the model protein bovine serum albumin. Therefore, coacervate charge represents a direct means of control over release rate and duration. The PELD coacervate also rapidly adsorbed onto a porous polymeric scaffold, demonstrating potential use in tissue engineering applications. This coacervate represents a safe and tunable protein delivery system for biomedical applications.
机译:聚阳离子作为蛋白质和遗传物质的载体具有良好的潜力。但是,目前对释放速度和安全性问题的控制不力限制了它​​们作为运载工具的使用。在这里,我们介绍了一种新型的基于赖氨酸的聚阳离子,聚(乙烯赖氨酰天冬氨酸二甘油酯)(PELD),它具有很高的细胞相容性。 PELD与生物聚阴离子肝素自组装成凝聚层,该凝聚层结合了具有高负载效率的蛋白质。通过简单地改变PELD:肝素的比例即可获得表面电荷变化的凝聚层,并导致模型蛋白牛血清白蛋白的释放曲线不同。因此,凝聚层电荷是控制释放速率和持续时间的直接手段。 PELD凝聚层也迅速吸附到多孔聚合物支架上,证明了在组织工程应用中的潜在用途。该凝聚层代表了用于生物医学应用的安全且可调的蛋白质递送系统。

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