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

Study Results

Results available

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE2

Total Enrollment

23 participants

Study Classification

INTERVENTIONAL

Study Start Date

2012-02-22

Study Completion Date

2017-07-28

Brief Summary

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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.

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Detailed Description

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Conditions

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Hypercholesterolemia

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Investigators Outcome Assessors

Study Groups

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GOFm PCSK9 (Cohort 1): Alirocumab From Day 1

Participants with gain-of-function mutation (GOFm) in proprotein convertase subtilisin/kexin type 9 (PCSK9) gene (Cohort 1): Alirocumab 150 mg subcutaneous (SC) injection at Week 0 (Day 1), Week 2 (Day 15), Week 4, 6 and 10 (matching placebo at Week 8, 12 and 14) during the double-blind period (Group A). Afterwards, participants have the possibility to continue in an open-label extension period with 150 mg alirocumab SC twice per week (Q2W) for an additional 3 years.

Group Type EXPERIMENTAL

Alirocumab

Intervention Type DRUG

SC injection in the abdomen

Placebo

Intervention Type DRUG

SC injection in the abdomen

GOFm PCSK9 (Cohort 1): Alirocumab From Day 15

Participants with gain-of-function mutation (GOFm) in proprotein convertase subtilisin/kexin type 9 (PCSK9) gene (Cohort 1): Alirocumab 150 mg subcutaneous (SC) injection at Week 2 (Day 15), Week 4, 6, 8 and 12 (\[matching placebo at Week 0 (Day 1), 10 and 14\]) during the double-blind period (Group B). Afterwards, participants have the possibility to continue in an open-label extension period with 150 mg alirocumab SC twice per week (Q2W) for an additional 3 years.

Group Type EXPERIMENTAL

Alirocumab

Intervention Type DRUG

SC injection in the abdomen

Placebo

Intervention Type DRUG

SC injection in the abdomen

GOFm PCSK9 or LOFm ApoB (Cohort 2): Alirocumab from Day 1

Participants with gain-of-function mutation (GOFm) in the proprotein convertase subtilisin/kexin type 9 (PCSK9) gene or loss-of-function mutation (LOFm) in the apolipoprotein (Apo) B gene (Cohort 2): Alirocumab 150 mg subcutaneous (SC) injection at Week 0 (Day 1), Week 2 (Day 15), Week 4, 6 and 10 (matching placebo at Week 8, 12 and 14) during the double-blind period (Group C). Afterwards, participants have the possibility to continue in an open-label extension period with 150 mg alirocumab SC twice per week (Q2W) for an additional 3 years.

Group Type EXPERIMENTAL

Alirocumab

Intervention Type DRUG

SC injection in the abdomen

Placebo

Intervention Type DRUG

SC injection in the abdomen

GOFm PCSK9 or LOFm ApoB (Cohort 2): Alirocumab from Day 15

Participants with gain-of-function mutation (GOFm) in proprotein convertase subtilisin/kexin type 9 (PCSK9) gene or loss-of-function mutation (LOFm) in apolipoprotein (Apo) B gene (Cohort 2): Alirocumab 150 mg subcutaneous (SC) injection at Week 2 (Day 15), Week 4, 6, 8 and 12 (\[matching placebo at Week 0 (Day 1), 10 and 14\]) during the double-blind period (Group D). Afterwards, participants have the possibility to continue in an open-label extension period with 150 mg alirocumab SC twice per week (Q2W) for an additional 3 years.

Group Type EXPERIMENTAL

Alirocumab

Intervention Type DRUG

SC injection in the abdomen

Placebo

Intervention Type DRUG

SC injection in the abdomen

Interventions

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Alirocumab

SC injection in the abdomen

Intervention Type DRUG

Placebo

SC injection in the abdomen

Intervention Type DRUG

Other Intervention Names

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Praluent® REGN727 SAR236553

Eligibility Criteria

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Inclusion Criteria

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

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

Minimum Eligible Age

18 Years

Maximum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No