Browsing by Author "Irving, Melita"

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    Safe and persistent growth-promoting effects of vosoritide in children with achondroplasia: 2-year results from an open-label, phase 3 extension study
    (SPRINGERNATURE, 2021-01-01) Savarirayan, Ravi; Tofts, Louise; Irving, Melita; Wilcox, William R.; Bacino, Carlos A.; Hoover-Fong, Julie; Font, Rosendo Ullot; Harmatz, Paul; Rutsch, Frank; Bober, Michael B.; Polgreen, Lynda E.; Ginebreda, Ignacio; Mohnike, Klaus; Charrow, Joel; Hoernschemeyer, Daniel; Ozono, Keiichi; Alanay, Yasemin; Arundel, Paul; Kotani, Yumiko; Yasui, Natsuo; White, Klane K.; Saal, Howard M.; Leiva-Gea, Antonio; Luna-Gonzalez, Felipe; Mochizuki, Hiroshi; Basel, Donald; Porco, Dania M.; Jayaram, Kala; Fisheleva, Elena; Huntsman-Labed, Alice; Day, Jonathan R. S.
    Purpose Achondroplasia is caused by pathogenic variants in the fibroblast growth factor receptor 3 gene that lead to impaired endochondral ossification. Vosoritide, an analog of C-type natriuretic peptide, stimulates endochondral bone growth and is in development for the treatment of achondroplasia. This phase 3 extension study was conducted to document the efficacy and safety of continuous, daily vosoritide treatment in children with achondroplasia, and the two-year results are reported. Methods After completing at least six months of a baseline observational growth study, and 52 weeks in a double-blind, placebo-controlled study, participants were eligible to continue treatment in an open-label extension study, where all participants received vosoritide at a dose of 15.0 mu g/kg/day. Results In children randomized to vosoritide, annualized growth velocity increased from 4.26 cm/year at baseline to 5.39 cm/year at 52 weeks and 5.52 cm/year at week 104. In children who crossed over from placebo to vosoritide in the extension study, annualized growth velocity increased from 3.81 cm/year at week 52 to 5.43 cm/year at week 104. No new adverse effects of vosoritide were detected. Conclusion Vosoritide treatment has safe and persistent growth-promoting effects in children with achondroplasia treated daily for two years.