Branched‐Tail Lipid Nanoparticles Potently Deliver mRNA In Vivo due to Enhanced Ionization at Endosomal pH
作者:Khalid A. Hajj、Rebecca L. Ball、Sarah B. Deluty、Shridhar R. Singh、Daria Strelkova、Christopher M. Knapp、Kathryn A. Whitehead
DOI:10.1002/smll.201805097
日期:2019.2
one‐carbon branch. Remarkably, this small difference in structure conferred a tenfold improvement in 306Oi10 efficacy. The enhanced potency of this branched‐tail lipidoid is attributed to its strong surface ionization at the late endosomal pH of 5.0. A secondary lipidoid library confirms that Oi10 materials ionize more strongly and deliver mRNA more potently than lipidoids containing linear tails. Together
只有建立安全有效的递送系统,mRNA治疗剂的潜力才能实现。不幸的是,对媒介物的分子性质如何赋予功效的理解不足阻碍了媒介物的发展。在这里,一个小型的类脂质材料库用于阐明结构与功能的关系,并确定与mRNA传递功效相关的先前未被认识的参数-脂质纳米颗粒表面电离。该文库中最有效的两种材料306O 10和306O i10在单次0.75 mg kg -1 mRNA剂量后可在小鼠中诱导大量的萤光素酶表达。这些类脂质具有十个碳尾并且分子量相同,仅在306O上有所不同10尾巴是笔直的,而306O i10尾巴有一个碳支。值得注意的是,在此结构小的差异赋予在306O提高10倍I10功效。该支尾类脂质的增强效力归因于其在内体pH值晚于5.0时强大的表面电离作用。二级类脂质库证实,与包含线性尾部的类脂质相比,O i10材料离子更强地电离并更有效地递送mRNA。总之,这些数据突显了脂质化学作用在mRNA传递过程中的精