John J P Kastelein1, G Kees Hovingh2, Gisle Langslet3, Marie T Baccara-Dinet4, Daniel A Gipe5, Umesh Chaudhari6, Jian Zhao7, Pascal Minini8, Michel Farnier9. 1. Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. Electronic address: j.j.kastelein@amc.uva.nl. 2. Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. 3. Lipid Clinic, Oslo University Hospital, Oslo, Norway. 4. Sanofi, Montpellier, France. 5. Regeneron Pharmaceuticals, Inc., Tarrytown, NY, USA. 6. Sanofi, Bridgewater, NJ, USA. 7. Regeneron Pharmaceuticals, Inc., Basking Ridge, NJ, USA. 8. Sanofi, Chilly-Mazarin, France. 9. Lipid Clinic, Point Médical, Dijon, France.
Abstract
BACKGROUND:Patients with heterozygous familial hypercholesterolemia (HeFH) are characterized by elevated low-density lipoprotein cholesterol (LDL-C) levels. Long-term effects of proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibition have not been thoroughly investigated in these patients. OBJECTIVE: We evaluated efficacy and safety of alirocumab, a PCSK9 inhibitor, vs placebo in patients with HeFH. METHODS: In total, 1257 patients with HeFH on maximally tolerated statin ± other lipid-lowering therapies from four 78-week ODYSSEY trials were analyzed. In FH I and II, patients with baseline LDL-C levels ≥70/100 mg/dL (n = 735), depending on documented cardiovascular disease history, received placebo or alirocumab 75 mg every 2 weeks (Q2W; with dose increase to 150 mg Q2W at week 12 if week 8 LDL-C was ≥70 mg/dL). Separately, data were pooled from HIGH FH (baseline LDL-C ≥160 mg/dL) and patients with HeFH from LONG TERM (baseline LDL-C ≥70 mg/dL), where patients received placebo or alirocumab 150 mg Q2W (n = 522). RESULTS: At week 24, alirocumab reduced LDL-C levels by -48.8% (75/150 mg Q2W; placebo: +7.1%) and -55.0% (alirocumab 150 mg Q2W; placebo: +1.3%) (both P < .0001 vs placebo; intention-to-treat analysis). Least-squares mean LDL-C levels of 69.1 to 75.6 mg/dL (alirocumab 75/150 mg/dL Q2W; baseline: 141.3 mg/dL) and 72.2 to 82.3 mg/dL (alirocumab 150 mg Q2W; baseline: 168.4 mg/dL) were achieved at weeks 24 to 78 (on-treatment analysis). Additional beneficial effects were observed in other lipids. Treatment-emergent adverse event rates were similar in the alirocumab (80.5%) and placebo groups (83.0%). CONCLUSIONS: In this large cohort of patients with HeFH, alirocumab significantly reduced LDL-C levels. Alirocumab was generally well tolerated.
RCT Entities:
BACKGROUND:Patients with heterozygous familial hypercholesterolemia (HeFH) are characterized by elevated low-density lipoprotein cholesterol (LDL-C) levels. Long-term effects of proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibition have not been thoroughly investigated in these patients. OBJECTIVE: We evaluated efficacy and safety of alirocumab, a PCSK9 inhibitor, vs placebo in patients with HeFH. METHODS: In total, 1257 patients with HeFH on maximally tolerated statin ± other lipid-lowering therapies from four 78-week ODYSSEY trials were analyzed. In FH I and II, patients with baseline LDL-C levels ≥70/100 mg/dL (n = 735), depending on documented cardiovascular disease history, received placebo or alirocumab 75 mg every 2 weeks (Q2W; with dose increase to 150 mg Q2W at week 12 if week 8 LDL-C was ≥70 mg/dL). Separately, data were pooled from HIGH FH (baseline LDL-C ≥160 mg/dL) and patients with HeFH from LONG TERM (baseline LDL-C ≥70 mg/dL), where patients received placebo or alirocumab 150 mg Q2W (n = 522). RESULTS: At week 24, alirocumab reduced LDL-C levels by -48.8% (75/150 mg Q2W; placebo: +7.1%) and -55.0% (alirocumab 150 mg Q2W; placebo: +1.3%) (both P < .0001 vs placebo; intention-to-treat analysis). Least-squares mean LDL-C levels of 69.1 to 75.6 mg/dL (alirocumab 75/150 mg/dL Q2W; baseline: 141.3 mg/dL) and 72.2 to 82.3 mg/dL (alirocumab 150 mg Q2W; baseline: 168.4 mg/dL) were achieved at weeks 24 to 78 (on-treatment analysis). Additional beneficial effects were observed in other lipids. Treatment-emergent adverse event rates were similar in the alirocumab (80.5%) and placebo groups (83.0%). CONCLUSIONS: In this large cohort of patients with HeFH, alirocumab significantly reduced LDL-C levels. Alirocumab was generally well tolerated.
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