Safety and Tolerability of RGX-314 (Investigational Product) Gene Therapy for Neovascular AMD Trial

Neovascular Age-related Macular Degeneration Clinical Trial

Official title: A Phase I/IIa (Phase 1/Phase 2a), Open-label, Multiple-cohort, Dose-escalation Study to Evaluate the Safety and Tolerability of Gene Therapy With RGX-314 in Subjects With Neovascular AMD (nAMD)

Status Completed

Clinical Trial Summary

Excessive vascular endothelial growth factor (VEGF) plays a key part in promoting neovascularization and edema in neovascular (wet) age-related macular degeneration (nAMD). VEGF inhibitors (anti-VEGF), including ranibizumab (LUCENTIS®, Genentech) and aflibercept (EYLEA®, Regeneron), have been shown to be safe and effective for treating nAMD and have demonstrated improvement in vision. However, anti-VEGF therapy is administered frequently via intravitreal injection and can be a significant burden to the patients. RGX-314 is a recombinant adeno-associated virus (AAV) gene therapy vector carrying a coding sequence for a soluble anti-VEGF protein. The long-term, stable delivery of this therapeutic protein following a 1 time gene therapy treatment for nAMD could potentially reduce the treatment burden of currently available therapies while maintaining vision with a favorable benefit:risk profile.

Clinical Trial Description

This Phase I/IIa, open-label, multiple-cohort, dose-escalation study was designed to evaluate the safety and tolerability of RGX-314 gene therapy in subjects with previously treated nAMD. Five doses were studied in approximately 42 subjects. Subjects who met the inclusion/exclusion criteria and had an anatomic response to an initial anti-VEGF injection received a single dose of RGX-314 administered by subretinal delivery. RGX-314 uses an AAV8 vector that contains a gene that encodes for a monoclonal antibody fragment which binds to and neutralizes VEGF activity. Safety was the primary focus for the initial 24 weeks after RGX-314 administration (primary study period). Following completion of the primary study period, subjects continued to be assessed until 104 weeks following treatment with RGX-314. ;

Related Conditions & MeSH terms

• Macular Degeneration
• Neovascular Age-related Macular Degeneration
• Wet Age-related Macular Degeneration

• NCT number: NCT03066258
• Study type: Interventional
• Source: REGENXBIO Inc.
• Status: Completed
• Phase: Phase 1/Phase 2
• Start date: March 29, 2017
• Completion date: June 17, 2021