Illuminating endosomal escape of polymorphic lipid nanoparticles that boost mRNA delivery.

Illuminating endosomal escape of polymorphic lipid nanoparticles that boost mRNA delivery.
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DOI:
10.1039/d0bm01947j
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发表时间:
2021-06-15
影响因子:
6.6
通讯作者:
Sahay G
Sahay G
中科院分区:
工程技术2区
文献类型:
--
作者:
Herrera M;Kim J;Eygeris Y;Jozic A;Sahay G

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以脂质为基础的纳米粒(LNPs)用于传递mRNA,已经跃居非病毒基因传递的前沿。尽管有这一令人兴奋的进展,但LNP细胞进入后糟糕的内体逃逸仍然是一个尚未解决的限速瓶颈。在这里,我们报告使用Galectin 8-GFP(Gal8-GFP)细胞报告系统来可视化LNP包裹的mRNA的内体逃逸能力。用植物类固醇取代胆固醇的LNPs在Gal8-GFP报告系统中表现出不同程度的Gal8募集。在活细胞成像中,含有β-谷甾醇的LNP-SITO的结果显示,与标准胆固醇LNPs(LNP-CHOL)相比,可检测到的内体扰动事件增加了10倍,这表明LNP-SITO具有优越的逃脱内体包裹的能力。对这些LNPs的转运研究表明,这些LNPs与晚期内小体有很强的定位。这种高度敏感和强大的Gal8-GFP报告系统可能是一个宝贵的工具,可以用来阐明复杂的LNP贩运和短暂的内体逃逸事件,从而使基因传递方面的进展成为可能。
Lipid-based nanoparticles (LNPs) for the delivery of mRNA have jumped to the forefront of non-viral gene delivery. Despite this exciting development, poor endosomal escape after LNP cell entry remains an unsolved, rate-limiting bottleneck. Here we report the use of a galectin 8-GFP (Gal8-GFP) cell reporter system to visualize the endosomal escape capabilities of LNP-encapsulated mRNA. LNPs substituted with phytosterols in place of cholesterol exhibited various levels of Gal8 recruitment in the Gal8-GFP reporter system. In live-cell imaging, the results of the LNPs containing β-sitosterol (LNP-Sito) showed a 10-fold increase in detectable endosomal perturbation events when compared to the standard cholesterol LNPs (LNP-Chol), suggesting the superior capability of LNP-Sito to escape from endosomal entrapment. Trafficking studies of these LNPs showed strong localization with late endosomes. This highly sensitive and robust Gal8-GFP reporter system can be a valuable tool to elucidate intricacies of LNP trafficking and ephemeral endosomal escape events, enabling advancements in gene delivery.
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