Lipid nanoparticle delivery limits antisense oligonucleotide activity and cellular distribution in the brain after intracerebroventricular injection

被引：13

作者：

Byrnes, Amy E. ^{[1
]}

Dominguez, Sara L. ^{[1
]}

Yen, Chun -Wan ^{[2
]}

Laufer, Benjamin I. ^{[1
,3
]}

Foreman, Oded ^{[1
,4
]}

Reichelt, Mike ^{[4
]}

Lin, Han ^{[1
]}

Sagolla, Meredith ^{[4
]}

Hoetzel, Kathy ^{[4
]}

Ngu, Hai ^{[4
]}

Soendergaard, Christoffer ^{[5
]}

Estevez, Alberto ^{[6
]}

Lin, Hsiu-Chao ^{[2
]}

Goyon, Alexandre ^{[2
]}

Bian, Juan ^{[2
]}

Lin, Jessica ^{[2
]}

Hinz, Flora I. ^{[1
]}

Friedman, Brad A. ^{[1
,3
]}

Easton, Amy ^{[1
]}

Hoogenraad, Casper C. ^{[1
,7
]}

机构：

[1] Genentech Inc, Dept Neurosci, South San Francisco, CA 94080 USA

[2] Genentech Inc, Synthet Mol Pharmaceut Sci, South San Francisco, CA 94080 USA

[3] Genentech Inc, Dept OMNI Bioinformat, South San Francisco, CA 94080 USA

[4] Genentech Inc, Dept Pathol, South San Francisco, CA 94080 USA

[5] Roche Innovat Ctr Copenhagen, Pharmaceut Res & Early Dev, Horsholm, Denmark

[6] Genentech Inc, Dept Struct Biol, South San Francisco, CA 94080 USA

[7] Genentech Inc, Dept Neurosci, South San Francisco, CA 94080 USA

来源：

MOLECULAR THERAPY-NUCLEIC ACIDS | 2023年 / 32卷

关键词：

SIRNA DELIVERY; MICROGLIA; RNA; PHARMACOKINETICS; TRAFFICKING; ACTIVATION; DISEASE; CULTURE;

D O I：

10.1016/j.omtn.2023.05.005

中图分类号：

R-3 [医学研究方法]; R3 [基础医学];

学科分类号：

1001 ;

摘要：

Antisense oligonucleotide (ASO) therapeutics are being inves-tigated for a broad range of neurological diseases. While ASOs have been effective in the clinic, improving productive ASO internalization into target cells remains a key area of focus the field. Here, we investigated how the delivery of ASO-loaded lipid nanoparticles (LNPs) affects ASO activity, subcellular trafficking, and distribution in the brain. We show that ASO-LNPs increase ASO activity up to 100-fold in cultured primary brain cells as compared to non-encapsulated ASO. However, contrast to the widespread ASO uptake and activity observed following free ASO delivery in vivo, LNP-delivered ASOs did not downregulate mRNA levels throughout the brain after tracerebroventricular injection. This lack of activity was likely due to ASO accumulation in cells lining the ventricles and blood vessels. Furthermore, we reveal a formulation-dependent activation of the immune system post dosing, suggesting that LNP encapsulation cannot mask cellular ASO backbone -medi-ated toxicities. Together, these data provide insights into how LNP encapsulation affects ASO distribution as well as activity in the brain, and a foundation that enables future optimization of brain-targeting ASO-LNPs.

引用

页码：773 / 793

页数：21

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