Institute of Molecular Medicine and Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, State Key Laboratory of Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China.
ACS Nano. 2023 Feb 14;17(3):2460-2471. doi: 10.1021/acsnano.2c09772. Epub 2023 Jan 24.
Mimicking the size and shape of spherical viruses, we constructed a soccer-ball shaped virus-inspired DNA origami (ViDO) framework as a programmable non-LNP (lipid nanoparticle) gene carrier. The DNA framework was decorated with precisely controlled recognition molecules outside and loaded with adequate genetic molecules inside. Five variants were constructed to systematically investigate their cell uptake and modulated gene silencing efficiency. Cellular uptake was enhanced with an increasing number of aptamers, while with a median number of aptamer supply, dispersed distribution performed better than the clustered pattern. Intriguingly, the transfection efficiency was maximized using the ViDO with clustered five aptamers, which exhibited a competitive RNA silencing effect induced by Lipo2000 with low cytotoxicity. Our results revealed the effects of aptamer distribution patterns on endocytosis and transfection, thus providing a programmable platform for meticulous optimization of the gene delivery system.
我们构建了一个类似球形病毒大小和形状的足球状病毒启发 DNA 折纸(ViDO)框架,作为可编程的非 LNP(脂质纳米颗粒)基因载体。该 DNA 框架的外部装饰有精确控制的识别分子,内部装载有足够的遗传分子。构建了五个变体来系统地研究它们的细胞摄取和调节基因沉默效率。随着适体数量的增加,细胞摄取得到增强,而在适体供应中位数的情况下,分散分布比聚集模式表现更好。有趣的是,使用具有聚集的五个适体的 ViDO 可最大程度地提高转染效率,其表现出由低细胞毒性的 Lipofectamine 2000 诱导的竞争性 RNA 沉默效应。我们的结果揭示了适体分布模式对细胞内吞和转染的影响,从而为基因传递系统的精细优化提供了一个可编程平台。
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