Regeneron Pharmaceuticals, Inc. announced the U.S. Food & Drug Administration (FDA) has extended the approval of Praluent® (alirocumab) as an adjunct to diet and other low-density lipoprotein cholesterol (LDL-C) lowering therapies to include pediatric patients aged 8 and older with heterozygous familial hypercholesterolemia (HeFH). Familial hypercholesterolemia (FH) is an inherited condition caused by mutations in one of several genes that control how the body processes cholesterol, which can lead to very high levels of LDL-C (bad cholesterol). FH can come in two forms: HeFH, which develops when one mutated gene is inherited from one parent; and homozygous familial hypercholesterolemia (HoFH), which develops when a mutated gene is inherited from both parents.

Praluent is approved to treat both children and adults with HeFH and adults with HoFH. The approval is based on a Phase 3, randomized multicenter trial evaluating pediatric patients aged 8 to 17 with HeFH, who had LDL-C levels of 130mg/dL or greater and were already being treated with lipid-lowering medications. Patients were randomized to receive Praluent (N=101) or placebo (N=52) every two or four weeks in two consecutive cohorts.

Patients who received Praluent every four weeks had 31% lower LDL-C than placebo at 24 weeks (97.5% Confidence Interval: -45.0% to -17.9%; p<0.0001). Improvements in additional key lipid parameters were also observed. Results from the trial were recently published in the Journal of the American Medical Association Pediatrics.

No new adverse reactions were identified in this trial, and the safety profile was consistent with the safety profile observed in adults with HeFH. Across Praluent trials in patients with primary hyperlipidemia (N=2,476), the most common adverse reactions (=5%) more frequently observed with Praluent than placebo have been injection site reactions (7%), and influenza (6%) and diarrhea (5%).