Study to Evaluate Efficacy and Safety of Inclisiran in Adolescents With Heterozygous Familial Hypercholesterolemia

Two Part (Double-blind Inclisiran Versus Placebo [Year 1] Followed by Open-label Inclisiran [Year 2]) Randomized Multicenter Study to Evaluate Safety, Tolerability, and Efficacy of Inclisiran in Adolescents (12 to Less Than 18 Years) With Heterozygous Familial Hypercholesterolemia and Elevated LDL-cholesterol (ORION-16)

This was a pivotal phase III study designed to evaluate safety, tolerability, and efficacy of inclisiran in adolescents with heterozygous familial hypercholesterolemia (HeFH) and elevated low density lipoprotein cholesterol (LDL-C).

This was a two-part (1 year double-blind inclisiran versus placebo / 1 year open-label inclisiran) multicenter study designed to evaluate safety, tolerability, and efficacy of inclisiran in adolescents with heterozygous familial hypercholesterolemia (HeFH) and elevated low density lipoprotein cholesterol (LDL-C) on stable standard of care background lipid-lowering therapy. The primary objective was to demonstrate superiority of inclisiran compared to placebo in reducing LDL-C (percent change) at Day 330.

Inclusion Criteria:

• Heterozygous Familial Hypercholesterolemia (HeFH) diagnosed either by genetic testing or on phenotypic criteria
• Fasting LDL-C >130 mg/dL (3.4 mmol/L) at screening
• Fasting triglycerides <400 mg/dL (4.5 mmol/L) at screening
• On maximally tolerated dose of statin (investigator's discretion) with or without other lipid-lowering therapy; stable for ≥ 30 days before screening

Exclusion Criteria:

• Homozygous familial hypercholesterolemia (HoFH)
• Active liver disease
• Secondary hypercholesterolemia, e.g. hypothyroidism or nephrotic syndrome
• Previous treatment with monoclonal antibodies directed towards PCSK9 (within 90 days of screening)
• Recent and/or planned use of other investigational medicinal products or devices