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Selection of an Efficient AAV Vector for Robust CNS Transgene Expression.
Molecular Therapy - Methods & Clinical Development ( IF 4.6 ) Pub Date : 2019-10-23 , DOI: 10.1016/j.omtm.2019.10.007
Killian S Hanlon 1, 2, 3 , Jonah C Meltzer 3, 4 , Tetyana Buzhdygan 5, 6, 7 , Ming J Cheng 2, 3 , Miguel Sena-Esteves 8 , Rachel E Bennett 3, 4 , Timothy P Sullivan 5, 6, 7 , Roshanak Razmpour 5, 6, 7 , Yi Gong 2, 3 , Carrie Ng 2, 3 , Josette Nammour 2, 3 , Daniela Maiz 3, 4 , Simon Dujardin 3, 4 , Servio H Ramirez 5, 6, 7 , Eloise Hudry 3, 4 , Casey A Maguire 2, 3
Affiliation  

Adeno-associated virus (AAV) capsid libraries have generated improved transgene delivery vectors. We designed an AAV library construct, iTransduce, that combines a peptide library on the AAV9 capsid with a Cre cassette to enable sensitive detection of transgene expression. After only two selection rounds of the library delivered intravenously in transgenic mice carrying a Cre-inducible fluorescent protein, we flow sorted fluorescent cells from brain, and DNA sequencing revealed two dominant capsids. One of the capsids, termed AAV-F, mediated transgene expression in the brain cortex more than 65-fold (astrocytes) and 171-fold (neurons) higher than the parental AAV9. High transduction efficiency was sex-independent and sustained in two mouse strains (C57BL/6 and BALB/c), making it a highly useful capsid for CNS transduction of mice. Future work in large animal models will test the translation potential of AAV-F.

中文翻译:

为稳健的 CNS 转基因表达选择有效的 AAV 载体。

腺相关病毒 (AAV) 衣壳文库产生了改进的转基因递送载体。我们设计了一个 AAV 文库结构 iTransduce,它将 AAV9 衣壳上的肽文库与 Cre 盒结合起来,以实现对转基因表达的灵敏检测。在携带 Cre 诱导型荧光蛋白的转基因小鼠中仅进行两轮文库选择后,我们从脑中流出分选的荧光细胞,DNA 测序揭示了两种主要的衣壳。其中一种衣壳,称为 AAV-F,介导大脑皮层中的转基因表达比亲本 AAV9 高 65 倍(星形胶质细胞)和 171 倍(神经元)。高转导效率与性别无关,并且在两种小鼠品系(C57BL/6 和 BALB/c)中持续存在,使其成为小鼠 CNS 转导的非常有用的衣壳。
更新日期:2019-10-23
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