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为免疫疗法量身定制的多糖氨酸功能化mRNA脂质纳米颗粒

Christoph Wilhelmy¹, Isabell Sofia Keil², Lukas Uebbing¹

¹Department of Biopharmaceutics and Pharmaceutical Technology, Johannes Gutenberg University Mainz, 55128 Mainz, Germany.

|August 26, 2023

概括

聚氨酸 (pSar) 脂质纳米颗粒 (LNPs) 显示了增强的mRNA传递效率. 研究人员发现pSar LNP在人体细胞中改善了传染,突出显示了它们对先进mRNA治疗的潜力.

科学领域:

纳米医学是一种纳米医学.
生物技术是生物技术.
材料科学材料科学材料科学

背景情况:

脂质纳米颗粒 (LNP) 是mRNA疗法的关键载体,其应用范围超出了疫苗.
了解LNP配方,内部结构和转染效率之间的联系对于优化mRNA疗法至关重要.

研究的目的:

为了研究不同的可电离脂质,辅助脂质和聚合物移植脂质 (聚糖[pSar]或聚乙烯糖醇[PEG]) 如何影响LNP内部结构和体外转化效率.
评估pSar作为一种用于增强mRNA LNP配方的新型隐形部分的潜力.

主要方法:

使用不同的可电离脂质 (DODMA,MC3),辅助脂质 (DOPE,DOPC) 和聚合物移植脂质 (pSar,PEG) 来制备LNP.
物理化学表征包括大小,泽塔潜力和RNA可访问性.
微角X射线散射 (SAXS) 用于分析内部LNP结构.
在体外转染和细胞结合测试使用人类外周血液单核细胞 (hPBMCs) 与记者mRNA.

主要成果:

萨克斯揭示了基于可电离和辅助脂质组成的独特的内部LNP结构.
pSar部分改变了LNP表面形态,增加了粗度.
含有pSar的LNP通常表现出更高的转染效率,其中MC3/DOPE/pSar获得了最高的活性.

结论:

pSar是一个有希望的隐形部分,用于开发改进的mRNA LNP产品.
通过阐明结构-活动关系,SAXS是合理的LNP配方开发的宝贵工具.
优化LNP组成,特别是pSar,可以显著提高mRNA传递效率.

关键词:

一个LNP就是LNP.癌症癌症癌症癌症癌症流动细胞计量是流动细胞计量的方法.免疫疗法免疫疗法脂质纳米颗粒的使用方法它们是mRNARNA.聚沙可氨酸是多的小角X射线散射的小角度X射线散射.疫苗疫苗疫苗疫苗

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