REGENXBIO Announces Completion of Pivotal Enrollment and Initiates Commercial Production in Duchenne Gene Therapy Program

Core Insights - REGENXBIO Inc. has completed enrollment in the pivotal AFFINITY DUCHENNE trial for RGX-202, a gene therapy for Duchenne muscular dystrophy, and has successfully produced initial batches for commercial supply [1][2][5] Trial Details - The AFFINITY DUCHENNE trial has enrolled 30 participants, focusing on the primary endpoint of achieving 10% microdystrophin expression at Week 12, with secondary endpoints assessing functional improvements [3][4] - In the Phase I/II portion, microdystrophin levels in participants ranged from 20% to 122%, with no serious adverse events reported, indicating a positive safety profile [4][8] Commercial Readiness - REGENXBIO has manufactured the first commercial supply batches of RGX-202, anticipating approval and launch in 2027, coinciding with market availability [5][6] - The company can produce up to 2,500 doses of RGX-202 annually using its proprietary NAVXpress manufacturing process, which achieves over 80% product purity [6][8] Product Overview - RGX-202 is positioned as a potential best-in-class gene therapy, utilizing a differentiated microdystrophin construct that encodes essential regions of dystrophin, including the C-Terminal domain [7][8] - Additional design features aim to enhance gene expression and reduce immunogenicity, supporting targeted delivery throughout skeletal and heart muscle [8]