REGENXBIO Announces Completion of Dosing of Third Cohort in Phase I Clinical Trial of RGX-314 Gene Therapy for Wet AMD
- Category: DNA RNA and Cells
- Published on Friday, 09 February 2018 09:57
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ROCKVILLE, MD, USA I February 08, 2018 I 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 it has completed dosing of the third cohort of six patients in a Phase I clinical trial evaluating RGX-314 for the treatment of patients suffering from wet age-related macular degeneration (wet AMD).
“We are excited about the progress that we have made in the clinical development of our lead product candidate, RGX-314,” said Stephen Yoo, M.D., Chief Medical Officer of REGENXBIO. “Completing enrollment of the third cohort in the Phase I clinical trial brings us one step closer toward delivering on the promise of a one-time treatment with rapid and sustained therapeutic effects for patients with wet AMD, one of the largest indications for which gene therapy is being developed.”
REGENXBIO plans to share topline results from the Phase I trial in late 2018.
About the Phase I Clinical Trial of RGX-314
RGX‑314 is currently being evaluated in a Phase I, multi-center, open-label, multiple-cohort, dose‑escalation study in adult subjects with wet AMD in the United States. The study is expected to include approximately eighteen previously treated wet AMD subjects that are responsive to anti-vascular endothelial growth factor (anti-VEGF) therapy and are 50 years of age or older. The study is designed to evaluate three doses of RGX-314 (3 × 10^9 genome copies (GC)/eye, 1 × 10^10 GC/eye, and 6 × 10^10 GC/eye). The primary purpose of the clinical study is to evaluate the safety and tolerability of RGX-314 at 24 weeks after a single dose administered by subretinal delivery. Primary endpoints include safety and tolerability and secondary endpoints include ocular examinations and imaging (including BCVA and SD‑OCT) and the need for additional anti-VEGF therapy. Following completion of the primary study period, subjects will enter a follow-up period and will continue to be assessed until week 106 for long term safety and durability of effect.
RGX-314 is being developed as a one-time subretinal treatment for wet AMD. It includes the NAV AAV8 vector encoding an antibody fragment which inhibits VEGF, modifying the pathway for formation of new leaky blood vessels which lead to retinal fluid accumulation and vision loss. In preclinical animal models with conditions similar to macular degeneration, significant and dose-dependent reduction of blood vessel growth and prevention of disease progression was observed after a single subretinal dose of RGX-314.
About Wet AMD
Wet AMD is characterized by loss of vision due to new leaky blood vessel formation in the retina. This results in fluid leakage that can manifest in physical changes in the structure of the retina and loss of vision. Wet AMD is a significant cause of vision loss in the United States, Europe and Japan. There may be more than 2 million people living with wet AMD in these geographies alone.
Current anti-VEGF therapies have significantly changed the landscape for treatment of wet AMD, becoming the standard of care due to their ability to improve vision and retinal fluid in the majority of patients. These therapies, however, require repetitive and inconvenient intraocular injections, typically ranging from every four to eight weeks in frequency, to maintain efficacy. Patients often experience a decline in the initial vision gain from therapy with reduced frequency of treatment over time.
About REGENXBIO Inc.
REGENXBIO is a leading clinical-stage biotechnology company seeking to improve lives through the curative potential of gene therapy. REGENXBIO’s NAV® Technology Platform, a proprietary adeno-associated virus (AAV) gene delivery platform, consists of exclusive rights to more than 100 novel AAV vectors, including AAV7, AAV8, AAV9 and AAVrh10. REGENXBIO and its third-party NAV Technology Platform Licensees are applying the NAV Technology Platform in the development of a broad pipeline of candidates in multiple therapeutic areas.