A Study of Alirocumab in Participants With Autosomal Dominant Hypercholesterolemia (ADH) and Gain-of-Function Mutations (GOFm) of the Proprotein Convertase Subtilisin Kexin 9 (PCSK9) Gene or Loss-of-Function Mutations (LOFm) of the Apolipoprotein (Apo) B Gene

A Phase 2 Pilot Study With a Randomized Double-Blind Treatment Phase to Evaluate the Pharmacodynamics and Safety of Alirocumab in Patients With Autosomal Dominant Hypercholesterolemia and Gain-of-Function Mutations in 1 or Both Alleles of the PCSK9 Gene or Loss-of-Function Mutations in 1 or More Alleles of the Loss-of-Function Mutations B Gene

The primary objective of the study is to assess the pharmacodynamic (PD) effect of alirocumab on serum low density lipoprotein cholesterol (LDL-C) during 14 weeks of subcutaneous (SC) administered alirocumab in patients with autosomal dominant hypercholesterolemia (ADH) and gain-of-function mutation (GOFm) in 1 or both alleles of the proprotein convertase subtilisin/kexin type 9 (PCSK9) gene or with loss-of-function mutation (LOFm) in 1 or more alleles of the apolipoprotein (ApoB) gene.

Inclusion Criteria:

Inclusion criteria include, but are not limited to the following:

1. Between the ages of 18 and 70 years, inclusive
2. A history of molecularly confirmed PCSK9 GOFm for cohort 1 and a history of molecularly confirmed PCSK9 GOFm or ApoB LOFm
3. Plasma LDL-Cholesterol levels ≥70 mg/dL at the screening visit on a lipid-lowering therapy (LLT) regimen stable for at least 28 days

Exclusion Criteria:

Exclusion criteria include, but are not limited to the following:

1. Serum triglycerides >350 mg/dL at the screening visit
2. Known to be positive for human immunodeficiency virus (HIV), hepatitis B virus, or hepatitis C virus
3. Pregnant or breast-feeding women.
4. Sexually active man or woman of childbearing potential who is unwilling to practice adequate contraception during the study