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首页> 外文期刊>ACS applied materials & interfaces >A Neutralized Noncharged Polyethylenimine-Based System for Efficient Delivery of siRNA into Heart without Toxicity
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A Neutralized Noncharged Polyethylenimine-Based System for Efficient Delivery of siRNA into Heart without Toxicity

机译:基于中和的不带电荷的聚乙烯亚胺基系统,可有效地将siRNA输送到心脏而无毒性

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摘要

Cationic polymers constitute an important class of materials in development of delivery vehicles for nucleic acid-based therapeutics. Among them, polyethylenimine (PEI) has been a classical cationic carrier intensively studied for therapeutic delivery of DNA, RNA, and short RNA molecules to treat diseases. However, the development of PEI for in vivo applications has been hampered by the inherent problems associated with the material, particularly its cytotoxicity and the instability of the nucleic acid complexation systems formed via electrostatic interactions. Here, we demonstrate a strategy to modify PEI polymers via hydrazidation to create neutralized, stable, and multifunctional system for delivering siRNA molecules. Through substitution of the primary amino groups of PEI with neutral hydrazide groups, cross-linked nanoparticles with surface decorated with a model targeting ligands were generated. The neutral cross-linked siRNA nanoparticles not only showed favorable biocompatibility and cell internalization efficiency in vitro but also allowed for significant tissue uptake and gene silencing efficiency in zebrafish heart in vivo. Our study suggests transformation of conventional branched PEI into a neutral polymer that can lead to a new category of nonviral carriers, and the resulting functional delivery systems may be further explored for development of siRNA therapeutics for treating cardiovascular disease/injury.
机译:阳离子聚合物构成用于基于核酸的治疗剂的递送载体开发中的一类重要材料。其中,聚乙烯亚胺(PEI)是经典的阳离子载体,经过深入研究,可用于治疗性疾病的DNA,RNA和短RNA分子的治疗性输送。然而,与该材料有关的固有问题,特别是其细胞毒性和通过静电相互作用形成的核酸复合系统的不稳定性,阻碍了用于体内应用的PEI的发展。在这里,我们演示了一种通过酰化修饰PEI聚合物以创建中和,稳定和多功能系统以递送siRNA分子的策略。通过用中性酰肼基团取代PEI的伯氨基,可生成表面装饰有模型靶向配体的交联纳米颗粒。中性交联的siRNA纳米颗粒不仅在体外显示出良好的生物相容性和细胞内在化效率,而且在体内的斑马鱼心脏中也具有显着的组织摄取和基因沉默效率。我们的研究表明,将常规的支链PEI转化为中性聚合物,可以导致一类新的非病毒载体,并且可以进一步探索由此产生的功能性递送系统,以开发用于治疗心血管疾病/损伤的siRNA治疗剂。

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