耐受性
水解
化学
酶
核酸
细胞内
脂质代谢
生物化学
药理学
生物
不利影响
作者
Richard Holland,Kieu Lam,Sunny Jeng,Kevin McClintock,Lorne Palmer,Petra Schreiner,Mark Wood,Wangshi Zhao,James Heyes
出处
期刊:ACS Nano
[American Chemical Society]
日期:2024-04-03
卷期号:18 (15): 10374-10387
标识
DOI:10.1021/acsnano.3c09028
摘要
The advent of mRNA for nucleic acid (NA) therapeutics has unlocked many diverse areas of research and clinical investigation. However, the shorter intracellular half-life of mRNA compared with other NAs may necessitate more frequent dosing regimens. Because lipid nanoparticles (LNPs) are the principal delivery system used for mRNA, this could lead to tolerability challenges associated with an accumulated lipid burden. This can be addressed by introducing enzymatically cleaved carboxylic esters into the hydrophobic domains of lipid components, notably, the ionizable lipid. However, enzymatic activity can vary significantly with age, disease state, and species, potentially limiting the application in humans. Here we report an alternative approach to ionizable lipid degradability that relies on nonenzymatic hydrolysis, leading to a controlled and highly efficient lipid clearance profile. We identify highly potent examples and demonstrate their exceptional tolerability in multiple preclinical species, including multidosing in nonhuman primates (NHP).
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