RNA-targeted therapeutics for lipid disorders

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Purpose of reviewTo summarize recent developments in the field of RNA-directed therapeutics targeting lipid disorders that are not effectively managed.Recent findingsDespite a number of approved therapies for lipid disorders, significant unmet needs are present in treating persistently elevated LDL-cholesterol, remnant-cholesterol, triglycerides and lipoprotein(a) [Lp(a)]. Small molecules and antibodies are effective modalities, but they are unable to adequately treat many patients with abnormal lipid parameters. Targeting mRNA with oligonucleotides to prevent protein translation is a relatively novel method to reduce circulating atherogenic lipoproteins. Small inhibiting RNA (siRNA) molecules targeting proprotein convertase subtilisin kexin type 9 to reduce LDL-C, and antisense oligonucleotides (ASO) targeting apolipoprotein C-III (apoC-III) to reduce triglycerides, angiopoietin-like 3 (ANGPTL3) to reduce LDL-C and triglycerides and apolipoprotein(a) (LPA) to reduce Lp(a) are currently in or just completed phase 1–3 trials. Fundamental differences exist in chemistry, delivery and mechanism of action of siRNA and ASOs.SummaryNovel RNA therapeutics are poised to provide highly potent, specific and effective therapies to reduce atherogenic lipoproteins. As these compounds are approved, clinicians will be able to choose from a broad armamentarium to treat nearly all patients to acceptable goals in order to reduce risk of cardiovascular disease and events.

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