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The aim of this study was to characterize the population pharmacokinetics of AZD8233, an antisense oligonucleotide (ASO) that targets the PCSK9 transcript to reduce hepatocyte PCSK9 protein production and plasma levels. AZD8233 utilizes generation 2.5 S‐constrained ethyl motif (cET) chemistry and is conjugated to a triantennary N‐acetylgalactosamine (GalNAc3) ligand for targeted hepatocyte uptake.

A non‐linear mixed‐effect modelling approach utilizing NONMEM software was applied to AZD8233 concentration–time data from 3416 samples in 219 participants from four phase 1–2 studies, one in healthy volunteers (NCT03593785) and three in patients with dyslipidaemia (NCT04155645, NCT04641299 and NCT04823611).

The final model described the AZD8233 plasma concentration–time profile from four phase 1–2 studies in healthy volunteers or participants with …