REGENXBIO Inc. (Nasdaq: RGNX), a leading clinical-stage biotechnology company seeking to improve lives through the curative potential of gene therapy based on its proprietary NAV® Technology Platform, today announced the first U.S. Food and Drug Administration (FDA) approval of a gene therapy that leverages REGENXBIO's proprietary NAV Technology Platform, Novartis AG's ZOLGENSMA® (onasemnogene abeparvovec-xioi; AVXS-101). ZOLGENSMA was approved by the FDA as a one-time infusion for pediatric patients with spinal muscular atrophy (SMA) who are less than two years of age.