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对mRNA-LNP结构特征和增强mRNA疫苗免疫性机制的表征

Kangzeng Wu¹, Fengwei Xu², Yongchao Dai²

¹College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China; Zhejiang-California International Nanosystems Institute, Zhejiang University, Hangzhou 310058, PR China.

Journal of controlled release : official journal of the Controlled Release Society

|November 10, 2024

概括

类似乳液的脂质纳米颗粒 (LNP) 显示出对mRNA疫苗的优越免疫性. 与经典LNP相比,这些新型LNP提供了快速发病和长时间的免疫反应,降低了系统毒性.

科学领域:

生物技术和纳米医学
疫苗开发疫苗开发
药物输送系统药物输送系统

背景情况:

脂质纳米颗粒 (LNP) 对于非病毒基因传递至关重要,特别是在mRNA疫苗中.
目前的LNP表征侧重于大小和效率,忽视了内部结构.
由于脂质组成和制备方法的LNP异质性会影响疫苗的活性.

研究的目的:

调查不同的内部LNP结构对mRNA疫苗输送和免疫性的影响.
为了比较类似乳液的LNP (eLNP),富含膜的LNP (mLNP) 和经典的LNP (cLNP).

主要方法:

准备具有多种内部结构的LNP:eLNP,mLNP和clNP.
脂质组成的表征,包括电离性脂质,DSPC和胆固醇百分比.
在体外和体内评估mRNA输送,抗原表达和肌肉内注射后的免疫反应.

主要成果:

与cLNP和mLNP相比,eLNP表现出更高的电离性脂质含量和更低的DSPC/胆固醇.
肌肉内注射eLNPs导致持续的局部抗原表达和强烈的免疫反应,具有快速开始和长时间的持续时间.
与cLNP和mLNP相比,eLNP显示出更高的免疫性和更低的全身毒性.

结论:

内部LNP结构显著影响mRNA疫苗的疗效和免疫性.
eLNP代表了mRNA疫苗的有前途的输送系统,增强免疫反应并最大限度地降低毒性.
针对性局部抗原表达的eLNP可以优化疫苗诱导的免疫力.

关键词:

运输运输运输运输运输运输免疫性免疫性免疫性一个LNP就是LNP.结构结构是一个结构.这是mRNA疫苗.

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