Vertex Pharmaceuticals Incorporated (Nasdaq:VRTX) today announced the U.S. Food and Drug Administration (FDA) approved KALYDECO (ivacaftor) for use in children with cystic fibrosis (CF) ages six months to less than 12 months who have at least one mutation in their cystic fibrosis transmembrane conductance regulator (CFTR) gene that is responsive to KALYDECO based on clinical and/or in vitro assay data.
KALYDECO is already approved in the U.S., Canada and EU for the treatment of CF in patients ages 12 months and older.
“Today’s approval for KALYDECO allows physicians to begin treating the underlying cause of CF in eligible infants as young as six months of age for the first time, with the potential to modify the course of the disease,” said Margaret Rosenfeld, M.D., MPH, Seattle Children’s Research Institute and Department of Pediatrics, University of Washington School of Medicine.
This FDA approval is based on data from a 24-week Phase 3 open-label safety cohort (ARRIVAL) of 11 children with CF aged six months to less than 12 months who have one of 10 mutations in the CFTR gene (G551D, G178R, S549N, S549R, G551S, G1244E, S1251N, S1255P, G1349D or R117H). The study demonstrated a safety profile similar to that observed in previous Phase 3 studies of older children and adults; most adverse events were mild or moderate in severity, and no patient discontinued therapy due to adverse events. The most common adverse events (≥30%) were cough (64%), nasal congestion (36%) and rhinorrhea (36%). Three serious adverse events, all considered unrelated to study treatment by the investigators, were observed in three patients.
Mean baseline sweat chloride for the children in this cohort was 101.5 mmol/L (n=11). Following 24 weeks of treatment with KALYDECO, the mean sweat chloride level was 43.1 mmol/L (n=6). In the six subjects with paired sweat chloride samples at baseline and week 24, there was a mean absolute change of -58.6 mmol/L (95% CI; -75.9, -41.3).
Results of this study were presented at the 32nd Annual North American Cystic Fibrosis Conference in October 2018.
“The manifestations of CF are often present at birth, which underscores our relentless commitment to reach the youngest CF patients possible in our clinical trials,” said Reshma Kewalramani, M.D., Executive Vice President and Chief Medical Officer at Vertex. “As an important outcome of these efforts, we are now able to treat infants with cystic fibrosis as early as six months of age with KALYDECO.”
KALYDECO was first approved in 2012 in the U.S. and is now available in more than 40 countries with more than 5,000 patients on therapy.
Source: Company Press Release