A Randomized, Open Label, Controlled, Phase 2 Clinical Study to Evaluate the Efficacy and Safety of RGX-314 AAV Gene Therapy Administered Via Subretinal Delivery in Participants With Center Involved Diabetic Macular Edema

Phase 2 open label, randomized, active controlled, dose-ranging trial in adults with Center Involved - Diabetic Macular Edema (CI - DME)

Start Date18 Mar 2025

Sponsor / Collaborator

Sierra Eye Associates

[+1]

NCT05407636

/ RecruitingPhase 3

A Randomized, Partially Masked, Controlled, Phase 3 Clinical Study to Evaluate the Efficacy and Safety of RGX-314 Gene Therapy in Participants With nAMD

ABBV-RGX-314 (also known as RGX-314) is being developed as a novel one-time gene therapy for the treatment of neovascular (wet) age-related macular degeneration (wet AMD). Wet AMD is characterized by loss of vision due to new, leaky blood vessel formation in the retina. Wet AMD is a significant cause of vision loss in the United States, Europe and Japan, with up to 2 million people living with wet AMD in these geographies alone. Current anti-vascular endothelial growth factor (VEGF) therapies have significantly changed the landscape for treatment of wet AMD, becoming the standard of care due to their ability to prevent progression of vision loss in the majority of patients. These therapies, however, require life-long intraocular injections, typically repeated every four to 12 weeks in frequency, to maintain efficacy. Due to the burden of treatment, patients often experience a decline in vision with reduced frequency of treatment over time. ABBV-RGX-314 is being developed as a potential one-time treatment for wet AMD.

Start Date28 Dec 2021

Sponsor / Collaborator

AbbVie, Inc.

[+1]

NCT05210803

/ Enrolling by invitationNot Applicable

A Long-term Follow-Up Study to Evaluate the Safety and Efficacy of Suprachoroidal Administration of RGX-314 for Participants With Neovascular Age-Related Macular Degeneration

This is a prospective, observational study designed to evaluate the long-term safety and efficacy of RGX-314. Eligible participants are those who were previously enrolled in a clinical study of nAMD in which they received suprachoroidal space (SCS) administration of RGX-314. Enrollment of each participant in the current study should occur after the participant has completed either the end of study or early discontinuation visit in the previous (parent) clinical study. Participants will be followed for up to 5 years after RGX-314 administration (inclusive of the parent study). As such, the total study duration for each participant may vary depending on when they enroll in the current study following RGX-314 administration in the parent study.

Start Date20 Dec 2021

Sponsor / Collaborator

AbbVie, Inc.

100 Clinical Results associated with Surabgene Lomparvovec

100 Translational Medicine associated with Surabgene Lomparvovec

100 Patents (Medical) associated with Surabgene Lomparvovec

Literatures (Medical) associated with Surabgene Lomparvovec

01 Jan 2025·Eye

Exploring new horizons in neovascular age-related macular degeneration: novel mechanisms of action and future therapeutic avenues

Review

Author: Singh, Rishi P. ; Shirian, Jonathan D. ; Shirian, Jonathan D ; Shukla, Priya ; Singh, Rishi P

AbstractNeovascular age-related macular degeneration (nAMD) can lead to significant vision impairment through the growth of abnormal neovascular membranes in the choroid. Despite advancements with current anti-vascular endothelial growth factor (VEGF) therapies, challenges such as frequent injections, inadequate response, and patient-related concerns persist. Emerging therapeutics aim to reduce vision-loss through a variety of mechanisms. Gene therapies, including RGX-314 and Ixo-vec, express an anti-VEGF protein, and 4D-150, expresses an anti-VEGF protein and a VEGF-C inhibitory miRNA. Anti-VEGF associated therapeutics include OPT-302, targeting VEGF-C and VEGF-D, BI 836880, which inhibits VEGF-A and Ang-2 activity, and Tarcocimab tedromer, inhibiting all VEGF-A isoforms. Agents with novel mechanisms of action include UBX1325, which inhibits an anti-apoptotic protein, Restoret (EYE103), a Wnt agonist, and the tyrosine kinase inhibitors, EYP-1901, OTX-TKI, CLS-AX, and KHK4951.

01 Dec 2024·American Journal of Ophthalmology

Subretinal Gene Therapy for Treatment of Retinal and Choroidal Vascular Diseases

Author: Mishra, Kapil ; Khanani, Arshad M ; Mojumder, Ohidul ; Khanani, Zoha A ; Gahn, Greggory M ; Aziz, Aamir A ; Khanani, Ibrahim ; Khan, Huma ; Sulahria, Humza ; Khan, Hannah

OBJECTIVEThis review article discusses investigational subretinal gene therapies for retinal vascular diseases, including AVA-101, an adeno-associated viral (AAV) 2 vector expressing soluble vascular endothelial growth factor (VEGF) receptor 1, ABBV-RGX-314, an AAV8 vector expressing an anti-VEGF-A antibody fragment, and EXG102-031, an AAV8 vector expressing a recombinant protein that blocks VEGF family members and angiopoietin 2.DESIGNReview article CONCLUSION: Subretinal injection is a commonly used delivery route for investigational gene therapy agents which is theorized to provide relative immune privilege, thereby reducing the risk of inflammation, while providing high transgene expression in photoreceptors and retinal pigment epithelium. Subretinal injection of AVA-101 demonstrated safety and tolerability in Phase I and IIa trials, but failed to maintain visual acuity and control exudation. In contrast, subretinal injection of some doses of ABBV-RGX-314 have shown evidence of controlling exudation and the maintaining vision, as well as safety and tolerability, leading to two ongoing pivotal trials comparing subretinal delivery of two different doses of ABBV-RGX-314 versus intravitreal injections of 0.5mg ranibizumab or 2mg aflibercept. These preliminary results are an encouraging and welcome development in the search for efficacious, long-duration treatments for retinal vascular diseases.

28 Jun 2024·Postgraduate Medical Journal

Advancements in the treatment of age-related macular degeneration: a comprehensive review

Review

Author: Papaioannou, Christos

AbstractAge-related macular degeneration (AMD) stands as a leading cause of irreversible blindness, particularly affecting central vision and impeding daily tasks. This paper provides a thorough exploration of AMD, distinguishing between its two main subtypes—Wet and Dry AMD—while shedding light on the prevalence and risk factors, including age, genetics, and smoking.The focus shifts to the current and future treatment landscape, examining both Dry and Wet AMD. Regarding Dry AMD, interventions such as antioxidant supplementation and ongoing clinical trials offer hope. Notable among these is Pegcetacoplan which is the only Food and Drug Administration (FDA)-approved medication, displaying promising results in reducing geographic atrophy lesions.For Wet AMD, anti-Vascular Endothelial Growth Factor therapies like Ranibizumab (Lucentis®) have been instrumental, and newer drugs like Faricimab and OPT-302 show comparable efficacy with extended dosing intervals. Additionally, gene therapies such as RGX-314 present a potential paradigm shift, reducing or eliminating the need for frequent injections. Biosimilars offer cost-effective alternatives.The paper also delves into the integration of technology and artificial intelligence in AMD management, highlighting the role of smartphone apps for patient monitoring and artificial intelligence algorithms for diagnosis and surveillance. Furthermore, patient perspectives on artificial intelligence demonstrate a positive correlation between understanding and trust.The narrative concludes with a glimpse into ground-breaking technologies, including retinal implants and bionic chips, offering hope for vision restoration. Overall, this paper underscores the multifaceted approach in addressing AMD, combining traditional and innovative strategies, paving the way for a more promising future in AMD treatment.

103

News (Medical) associated with Surabgene Lomparvovec

30 Apr 2025

·www.prnewswire.com

Roche's Susvimo FDA Approval Marks New Era in Diabetic Macular Edema Treatment Market | DelveInsight

Seven months after the FDA approved the reintroduction of Roche's eye implant Susvimo, the US agency has expanded its approved use to include treatment for diabetic macular edema, the primary cause of blindness related to diabetes. This marks the second approved indication for Susvimo, which was initially cleared in October 2021 as an alternative to frequent eye injections for wet age-related macular degeneration. LAS VEGAS, April 30, 2025 /PRNewswire/ -- Diabetic macular edema is a complication that develops from diabetic retinopathy, a widespread consequence of diabetes and a leading cause of irreversible vision loss in working-age adults globally. Diabetic retinopathy occurs due to long-term damage to the retina's small blood vessels, leading to fluid leakage and swelling—especially in the macula. As per DelveInsight's analysis, there were about 1.9 million prevalent cases of DME across the 7MM in 2023, with numbers expected to grow at a notable CAGR during the forecast period. The primary treatment for DME includes intravitreal injections, where the eye is numbed with drops before injecting medication directly into the vitreous humor. Common anti-VEGF drugs used include AVASTIN, EYLEA, and LUCENTIS. Additionally, corticosteroids are beneficial in cases of DME linked to inflammatory eye conditions and can be delivered via eye drops, oral tablets, or periocular injections to help reduce inflammation. The US FDA approved sustained-release corticosteroid implants for more serious or longer-lasting conditions, are OZURDEX, RETISERT, and ILUVIEN. Learn more about the diabetic macular edema treatment @ New Treatment for Diabetic Macular Edema EYLEA (Regeneron Pharmaceuticals) – Aflibercept is a recombinant fusion protein composed of the VEGF-binding regions derived from the extracellular domains of human VEGF receptors 1 and 2, linked to the Fc segment of human IgG1. It functions as a VEGF trap by binding to circulating vascular endothelial growth factors (VEGFs), thereby neutralizing VEGF-A, VEGF-B, and placental growth factor (PGF). This action inhibits the formation of new blood vessels in the tumor's choriocapillaris. In July 2014, the U.S. FDA approved EYLEA (aflibercept) Injection for treating diabetic macular edema (DME). Ranibizumab (Genentech) – Marketed as LUCENTIS, ranibizumab is a monoclonal antibody fragment (Fab) derived from the same original mouse antibody as bevacizumab. It is an anti-angiogenic therapy used to treat the "wet" form of age-related macular degeneration (AMD), a leading cause of vision loss in older adults. Ranibizumab has shown comparable effectiveness to bevacizumab. Developed by Genentech, it is marketed in the U.S. by Genentech and internationally by Novartis. The FDA approved ranibizumab for the treatment of DME in 2012. In February 2025, Roche announced that the FDA had approved Susvimo (ranibizumab injection) 100 mg/mL for treating diabetic macular edema (DME), a major cause of vision loss in adults with diabetes. This approval is based on positive one-year data from the phase III Pagoda trial, which demonstrated that Susvimo offered sustained improvements in vision for individuals with DME, with a safety profile consistent with what is already known for the drug. In the study, patients receiving Susvimo refills every six months experienced vision gains comparable to those receiving monthly intravitreal injections of 0.5 mg ranibizumab (9.6 letters versus 9.4 letters on an eye chart, equivalent to about two lines of vision improvement). Susvimo delivers a specially formulated version of ranibizumab continuously through the Port Delivery Platform, offering a less frequent dosing alternative compared to other treatments that may require monthly eye injections. The FDA initially approved Susvimo in 2021 for the treatment of neovascular age-related macular degeneration (nAMD). Regulatory reviews in other countries are currently underway. Learn more about the FDA-approved DME drugs @ Drugs for Diabetic Macular Edema Treatment Key players, such as Oculis, Rezolute, AsclepiX Therapeutics, and others, are evaluating their lead candidates in different stages of clinical development, respectively. They aim to investigate their products for the treatment of diabetic macular edema. The DME market has a promising outlook with the emerging therapies. Some of the drugs in the pipeline are OCS-01, RZ402, AXT107, and others. DME leads to significant vision loss in diabetics, affecting up to 7.9% of type 1 and 12.8% of type 2 diabetes patients. AbbVie, in collaboration with REGENEXBIO, is developing the gene therapy ABBV-RGX-314. This therapy targets wet age-related macular degeneration, diabetic retinopathy (DR), and other chronic retinal diseases, potentially offering a breakthrough in treating these conditions. Discover which therapies are expected to grab major DME market share @ Diabetic Macular Edema Market Report OCS-01 is a high-concentration dexamethasone eye drop developed for diabetic macular edema (DME), utilizing the proprietary Optireach solubilizing platform. This technology enhances drug solubility, allows for higher concentrations, prolongs ocular retention, and improves bioavailability in eye tissues, including the retina. Recently, in April 2025, Oculis announced the completion of patient enrollment for its Phase 3 DIAMOND-1 and DIAMOND-2 clinical trials evaluating OCS-01 eye drops for diabetic macular edema (DME). These pivotal registration studies aim to support global regulatory filings, including a New Drug Application (NDA) submission and potential approval by the U.S. FDA. Over 800 patients were enrolled across 119 sites in the U.S. and other countries. The swift completion of enrollment in the DIAMOND program—comprising two double-masked, randomized, multi-center Phase 3 trials—is a significant milestone. These studies are assessing the efficacy and safety of OCS-01 over a 52-week treatment period in patients with DME. Topline results are anticipated in Q2 2026, followed by an NDA submission. If approved, OCS-01 would be the first topical eye drop treatment for DME, offering a novel therapeutic option for early intervention and for patients who do not adequately respond to anti-VEGF therapies. RZ402 is an oral small-molecule drug that selectively inhibits plasma kallikrein (PK) for the long-term treatment of DME. By blocking kallikrein activation, RZ402 aims to prevent bradykinin-driven vascular leakage and inflammation. Phase II results revealed a significant reduction in central subfield thickness (CST) across all dosing levels, with improvements of up to ~50 microns compared to placebo. The treatment was well tolerated and showed a favorable safety profile. AXT107 targets two validated mechanisms for treating retinal vascular diseases: it inhibits the pro-angiogenic receptor VEGFR2 and activates the vessel-stabilizing Tie2 receptor. These effects are mediated through its interaction with integrins αvβ3 and α5β1. AXT107 is formulated as a microparticulate suspension designed for intraocular injection and is currently undergoing Phase I/II clinical trials, according to the company's development pipeline. Discover more about drugs for DME in development @ Diabetic Macular Edema Clinical Trials The anticipated launch of these emerging therapies for DME are poised to transform the market landscape in the coming years. As these cutting-edge therapies continue to mature and gain regulatory approval, they are expected to reshape the DME market landscape, offering new standards of care and unlocking opportunities for medical innovation and economic growth. DelveInsight estimates that the market size for DME is expected to grow from USD 3 billion in 2023, with a significant CAGR by 2034. Owing to the higher patient pool and higher diabetic macular edema treatment cost, according to the estimates, the United States had the highest market size in DME, i.e., ~60% of the total market size of DME in the 7MM, in 2023, followed by Germany and Japan. DelveInsight's analysis forecasts market growth due to the introduction of emerging therapies, expecting a rise in market size during the study period (2020–2034). The anticipated increase in market size is driven by advancements in treatment options, greater healthcare access, and a rising prevalence of the condition, which together foster higher demand for innovative and effective therapies. DelveInsight's latest published market report, titled as Diabetic Macular Edema Market Insight, Epidemiology, and Market Forecast – 2034 , will help you to discover which market leader is going to capture the largest market share. The report provides comprehensive insights into the DME country-specific treatment guidelines, patient pool analysis, and epidemiology forecast to help understand the key opportunities and assess the market's underlying potential. The DME market report proffers epidemiological analysis for the study period 2020–2034 in the 7MM segmented into: Total Prevalent Cases of DME Total Diagnosed Prevalent Cases of DME Gender-specific Diagnosed Prevalent Cases of DME Age-Specific Diagnosed Prevalent Cases of DME Subgroup-specific Diagnosed Prevalent Cases of DME The report provides an edge while developing business strategies by understanding trends shaping and driving the 7MM DME market. Highlights include: 10-year Forecast 7MM Analysis Epidemiology-based Market Forecasting Historical and Forecasted Market Analysis upto 2034 Emerging Drug Market Uptake Peak Sales Analysis Key Cross Competition Analysis Industry Expert's Opinion Access and Reimbursement Download this DME market report to assess the epidemiology forecasts, understand the patient journeys, know KOLs' opinions about the upcoming treatment paradigms, and determine the factors contributing to the shift in the DME market. Also, stay abreast of the mitigating factors to improve your market position in the DME therapeutic space. Related Reports Diabetic Macular Edema Epidemiology Forecast Diabetic Macular Edema Epidemiology Forecast – 2034 report delivers an in-depth understanding of the disease, historical and forecasted diabetic macular edema epidemiology in the 7MM, i.e., the United States, EU5 (Germany, Spain, Italy, France, and the United Kingdom), and Japan. Diabetic Macular Edema Pipeline Diabetic Macular Edema Pipeline Insight – 2025 report provides comprehensive insights about the pipeline landscape, pipeline drug profiles, including clinical and non-clinical stage products, and the key diabetic macular edema companies, including Mylan Pharmaceuticals, Kodiak Sciences, Celltrion, Exonate, Opthea, AsclepiX Therapeutics, Allgenesis Biotherapeutics, Ascentage Pharma, Rezolute, Ocuphire Pharma, Oxurion, MingSight Pharmaceuticals, Adverum Biotechnologies, among others. Diabetic Retinopathy Market Diabetic Retinopathy Market Insights, Epidemiology, and Market Forecast – 2034 report delivers an in-depth understanding of the disease, historical and forecasted epidemiology, as well as the market trends, market drivers, market barriers, and key diabetic retinopathy companies, including Genentech, Inc., Regeneron Pharmaceuticals, Roche, Opthea Limited, Regenxbio, Kodiak Sciences Inc, Ocuphire Pharma, Eisai Co Ltd, Apexian Pharmaceuticals, Oculis, among others. Diabetic Retinopathy Pipeline Diabetic Retinopathy Pipeline Insight – 2025 report provides comprehensive insights about the pipeline landscape, pipeline drug profiles, including clinical and non-clinical stage products, and the key diabetic retinopathy companies, including Kodiak Sciences, Novartis, Regenxbio Inc., OcuTerra Therapeutics, Ocular Therapeutix, Bayer, RemeGen, Roche, Ocuphire Pharma, Adverum Biotechnologies, Boehringer Ingelheim, Palatin Technologies, Valo Health, EyePoint Pharmaceuticals, Kubota Vision, MingSight Pharmaceuticals, Oxurion, Aerie Pharmaceuticals, AsclepiX Therapeutics, Ocugen, Ashvattha Therapeutics, Stealth BioTherapeutics, among others. About DelveInsight DelveInsight is a leading Business Consultant and Market Research firm focused exclusively on life sciences. It supports pharma companies by providing comprehensive end-to-end solutions to improve their performance. Get hassle-free access to all the healthcare and pharma market research reports through our subscription-based platform PharmDelve . Contact Us Shruti Thakur [email protected] +14699457679 Logo: SOURCE DelveInsight Business Research, LLP WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

Clinical ResultPhase 3Drug ApprovalPhase 2

20 Mar 2025

·pipelinereview.com

REGENXBIO reports positive biomarker data from AFFINITY DUCHENNE trial of RGX-202 gene therapy

ROCKVILLE, MD, USA I March 19, 2025 I REGENXBIO Inc. (Nasdaq: RGNX ) today reported new, positive interim data from two additional patients in the Phase I/II portion of the AFFINITY DUCHENNE ® trial of RGX-202, a differentiated investigational gene therapy for Duchenne muscular dystrophy (Duchenne). Results were presented at the 2025 Muscular Dystrophy Association (MDA) Clinical & Scientific Conference. “RGX-202 is the only next generation gene therapy for Duchenne in a pivotal phase trial. The new data from the age 1-3 cohort builds on the favorable safety and efficacy profile seen in ages 4 and older and reinforces the potential of RGX-202 to serve a wide age range of patients,” said Steve Pakola, M.D., Chief Medical Officer of REGENXBIO. “The consistent, robust microdystrophin levels seen across the age range as well as the functional improvements previously reported support RGX-202’s potential to alter the course of this devastating disease. We look forward to sharing additional Phase I/II functional data in the first half of 2025. We also continue to rapidly advance the pivotal trial towards completing enrollment this year and BLA submission mid-2026.” “Patients with Duchenne continue to be in need of treatment options that could meaningfully impact the course of disease,” said Carolina Tesi-Rocha, M.D., Stanford Children’s Hospital. “The microdystrophin expression and biomarker data presented represent key indicators of potential therapeutic effect. Combined with the safety and functional data to date, I am highly encouraged by the profile of RGX-202.” AFFINITY DUCHENNE Phase I/II Interim Data Updates Biomarker Data New biomarker data from two patients who received the pivotal dose of RGX-202 were presented at MDA and continue to support consistent, robust expression and transduction of RGX-202 microdystrophin across all ages. In a patient aged 3 at dosing, microdystrophin expression was measured to be 122.3% compared to control. Patients under 4 years old have no access to gene therapy, and REGENXBIO is the only gene therapy sponsor recruiting patients in this age group in the U.S. In a patient aged 7 years old, RGX-202 microdystrophin expression was measured to be 31.5% compared to control. In all patients, RGX-202 was appropriately localized to the sarcolemma, demonstrating the differentiated construct with the CT-Domain is appropriately targeting the muscle. RGX-202 microdystrophin expression results in ambulatory patients aged 8+ are the highest reported microdystrophin levels across approved or investigational gene therapies. To support a Biologics License Application (BLA) using the accelerated approval pathway, the primary endpoint in the pivotal phase of AFFINITY DUCHENNE is the proportion of participants whose RGX-202 microdystrophin expression is ≥10% at Week 12. RGX-202 also continues to demonstrate the highest reported vector genome copies (4.9-55.4) measured by qPCR across approved or investigational gene therapies. Safety and Tolerability Data As of February 21, 2025, RGX-202 was well tolerated with no serious adverse events (SAEs) and no AEs of special interest (AESIs). Common drug-related AEs included nausea, vomiting and fatigue. All resolved and are typically anticipated with gene therapy administration. A thorough, proactive, short-course immune modulation regimen in combination with industry-leading product purity levels of more than 80% full capsids may contribute to the favorable safety profile seen in patients receiving RGX-202 to date. As reported in November 2024, the first five participants in the Phase I/II portion of the AFFINITY DUCHENNE trial all showed functional improvements that exceeded external natural history controls, demonstrating evidence of RGX-202 positively impacting disease trajectory. ( press release ). Patients demonstrated stable or improved function on the North Star Ambulatory Assessment (NSAA) and timed function tests. REGENXBIO plans to share additional interim functional data in the first half of 2025. About RGX-202 RGX-202 is a potential best-in-class investigational gene therapy designed for improved function and outcomes in Duchenne. RGX-202 is the only gene therapy approved or in late-stage development for Duchenne with a differentiated microdystrophin construct that encodes key regions of naturally occurring dystrophin, including the C-Terminal (CT) domain. In preclinical studies, the CT domain has been shown to protect the muscle from contraction-induced stress and improve its ability to repair itself. Additional design features may potentially improve gene expression, increase protein translation efficiency and reduce immunogenicity. RGX-202 is designed to support the delivery and targeted expression of microdystrophin throughout skeletal and heart muscle using the NAV ® AAV8 vector and a well-characterized muscle-specific promoter (Spc5-12). RGX-202 is manufactured using REGENXBIO’s proprietary, high-yielding NAVXpress™ suspension-based platform process. About Duchenne Muscular Dystrophy Duchenne is a severe, progressive, degenerative muscle disease, affecting 1 in 3,500 to 5,000 boys born each year worldwide. Duchenne is caused by mutations in the Duchenne gene which encodes for dystrophin, a protein involved in muscle cell structure and signaling pathways. Without dystrophin, muscles throughout the body degenerate and become weak, eventually leading to loss of movement and independence, required support for breathing, cardiomyopathy and premature death. ABOUT REGENXBIO Inc. REGENXBIO is a biotechnology company on a mission to improve lives through the curative potential of gene therapy. Since its founding in 2009, REGENXBIO has pioneered the field of AAV gene therapy. REGENXBIO is advancing a late-stage pipeline of one-time treatments for rare and retinal diseases, including RGX-202 for the treatment of Duchenne; clemidsogene lanparvovec (RGX-121) for the treatment of MPS II and RGX-111 for the treatment of MPS I, both in partnership with Nippon Shinyaku; and surabgene lomparvovec (ABBV-RGX-314) for the treatment of wet AMD and diabetic retinopathy, in collaboration with AbbVie. Thousands of patients have been treated with REGENXBIO’s AAV platform, including those receiving Novartis’ ZOLGENSMA ® . REGENXBIO’s investigational gene therapies have the potential to change the way healthcare is delivered for millions of people. For more information, please visit www.REGENXBIO.com . SOURCE: REGENXBIO

Gene TherapyClinical Result

19 Mar 2025

·www.prnewswire.com

REGENXBIO REPORTS POSITIVE BIOMARKER DATA FROM AFFINITY DUCHENNE® TRIAL OF RGX-202 GENE THERAPY

Positive biomarker data in patient aged 1-3 add to consistent, robust microdystrophin and transduction levels across all treated ages Patient aged 3 years at dosing had expression level at 122.3% compared to control With a differentiated novel construct and proactive short course immune modulation regimen, RGX-202 continues to demonstrate encouraging safety profile with no SAEs or AESIs Phase III portion of AFFINITY DUCHENNE® trial enrolling ambulatory patients aged 1 and above, on track for BLA submission mid-2026 ROCKVILLE, Md., March 19, 2025 /PRNewswire/ -- REGENXBIO Inc. (Nasdaq: RGNX) today reported new, positive interim data from two additional patients in the Phase I/II portion of the AFFINITY DUCHENNE® trial of RGX-202, a differentiated investigational gene therapy for Duchenne muscular dystrophy (Duchenne). Results were presented at the 2025 Muscular Dystrophy Association (MDA) Clinical & Scientific Conference. "RGX-202 is the only next generation gene therapy for Duchenne in a pivotal phase trial. The new data from the age 1-3 cohort builds on the favorable safety and efficacy profile seen in ages 4 and older and reinforces the potential of RGX-202 to serve a wide age range of patients," said Steve Pakola, M.D., Chief Medical Officer of REGENXBIO. "The consistent, robust microdystrophin levels seen across the age range as well as the functional improvements previously reported support RGX-202's potential to alter the course of this devastating disease. We look forward to sharing additional Phase I/II functional data in the first half of 2025. We also continue to rapidly advance the pivotal trial towards completing enrollment this year and BLA submission mid-2026." "Patients with Duchenne continue to be in need of treatment options that could meaningfully impact the course of disease," said Carolina Tesi-Rocha, M.D., Stanford Children's Hospital. "The microdystrophin expression and biomarker data presented represent key indicators of potential therapeutic effect. Combined with the safety and functional data to date, I am highly encouraged by the profile of RGX-202." AFFINITY DUCHENNE Phase I/II Interim Data Updates Biomarker Data New biomarker data from two patients who received the pivotal dose of RGX-202 were presented at MDA and continue to support consistent, robust expression and transduction of RGX-202 microdystrophin across all ages. In a patient aged 3 at dosing, microdystrophin expression was measured to be 122.3% compared to control. Patients under 4 years old have no access to gene therapy, and REGENXBIO is the only gene therapy sponsor recruiting patients in this age group in the U.S. In a patient aged 7 years old, RGX-202 microdystrophin expression was measured to be 31.5% compared to control. In all patients, RGX-202 was appropriately localized to the sarcolemma, demonstrating the differentiated construct with the CT-Domain is appropriately targeting the muscle. RGX-202 microdystrophin expression results in ambulatory patients aged 8+ are the highest reported microdystrophin levels across approved or investigational gene therapies. To support a Biologics License Application (BLA) using the accelerated approval pathway, the primary endpoint in the pivotal phase of AFFINITY DUCHENNE is the proportion of participants whose RGX-202 microdystrophin expression is ≥10% at Week 12. RGX-202 also continues to demonstrate the highest reported vector genome copies (4.9-55.4) measured by qPCR across approved or investigational gene therapies. Safety and Tolerability Data As of February 21, 2025, RGX-202 was well tolerated with no serious adverse events (SAEs) and no AEs of special interest (AESIs). Common drug-related AEs included nausea, vomiting and fatigue. All resolved and are typically anticipated with gene therapy administration. A thorough, proactive, short-course immune modulation regimen in combination with industry-leading product purity levels of more than 80% full capsids may contribute to the favorable safety profile seen in patients receiving RGX-202 to date. As reported in November 2024, the first five participants in the Phase I/II portion of the AFFINITY DUCHENNE trial all showed functional improvements that exceeded external natural history controls, demonstrating evidence of RGX-202 positively impacting disease trajectory. (press release). Patients demonstrated stable or improved function on the North Star Ambulatory Assessment (NSAA) and timed function tests. REGENXBIO plans to share additional interim functional data in the first half of 2025. About RGX-202 RGX-202 is a potential best-in-class investigational gene therapy designed for improved function and outcomes in Duchenne. RGX-202 is the only gene therapy approved or in late-stage development for Duchenne with a differentiated microdystrophin construct that encodes key regions of naturally occurring dystrophin, including the C-Terminal (CT) domain. In preclinical studies, the CT domain has been shown to protect the muscle from contraction-induced stress and improve its ability to repair itself. Additional design features may potentially improve gene expression, increase protein translation efficiency and reduce immunogenicity. RGX-202 is designed to support the delivery and targeted expression of microdystrophin throughout skeletal and heart muscle using the NAV® AAV8 vector and a well-characterized muscle-specific promoter (Spc5-12). RGX-202 is manufactured using REGENXBIO's proprietary, high-yielding NAVXpress™ suspension-based platform process. About Duchenne Muscular Dystrophy Duchenne is a severe, progressive, degenerative muscle disease, affecting 1 in 3,500 to 5,000 boys born each year worldwide. Duchenne is caused by mutations in the Duchenne gene which encodes for dystrophin, a protein involved in muscle cell structure and signaling pathways. Without dystrophin, muscles throughout the body degenerate and become weak, eventually leading to loss of movement and independence, required support for breathing, cardiomyopathy and premature death. ABOUT REGENXBIO Inc. REGENXBIO is a biotechnology company on a mission to improve lives through the curative potential of gene therapy. Since its founding in 2009, REGENXBIO has pioneered the field of AAV gene therapy. REGENXBIO is advancing a late-stage pipeline of one-time treatments for rare and retinal diseases, including RGX-202 for the treatment of Duchenne; clemidsogene lanparvovec (RGX-121) for the treatment of MPS II and RGX-111 for the treatment of MPS I, both in partnership with Nippon Shinyaku; and surabgene lomparvovec (ABBV-RGX-314) for the treatment of wet AMD and diabetic retinopathy, in collaboration with AbbVie. Thousands of patients have been treated with REGENXBIO's AAV platform, including those receiving Novartis' ZOLGENSMA®. REGENXBIO's investigational gene therapies have the potential to change the way healthcare is delivered for millions of people. For more information, please visit . FORWARD-LOOKING STATEMENTS This press release includes "forward-looking statements," within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements express a belief, expectation or intention and are generally accompanied by words that convey projected future events or outcomes such as "believe," "may," "will," "estimate," "continue," "anticipate," "assume," "design," "intend," "expect," "could," "plan," "potential," "predict," "seek," "should," "would" or by variations of such words or by similar expressions. The forward-looking statements include statements relating to, among other things, REGENXBIO's future operations, clinical trials, costs and cash flow. REGENXBIO has based these forward-looking statements on its current expectations and assumptions and analyses made by REGENXBIO in light of its experience and its perception of historical trends, current conditions and expected future developments, as well as other factors REGENXBIO believes are appropriate under the circumstances. However, whether actual results and developments will conform with REGENXBIO's expectations and predictions is subject to a number of risks and uncertainties, including the timing of enrollment, commencement and completion and the success of clinical trials conducted by REGENXBIO, its licensees and its partners, the timing of commencement and completion and the success of preclinical studies conducted by REGENXBIO and its development partners, the timing or likelihood of payments from AbbVie or Nippon Shinyaku, the monetization of any priority review voucher, the timely development and launch of new products, the ability to obtain and maintain regulatory approval of product candidates, the ability to obtain and maintain intellectual property protection for product candidates and technology, trends and challenges in the business and markets in which REGENXBIO operates, the size and growth of potential markets for product candidates and the ability to serve those markets, the rate and degree of acceptance of product candidates, and other factors, many of which are beyond the control of REGENXBIO. Refer to the "Risk Factors" and "Management's Discussion and Analysis of Financial Condition and Results of Operations" sections of REGENXBIO's Annual Report on Form 10-K for the year ended December 31, 2024, which will be filed with the U.S. Securities and Exchange Commission (SEC) in the first quarter of 2025, and comparable "risk factors" sections of REGENXBIO's Quarterly Reports on Form 10-Q and other filings, which have been filed with the SEC and are available on the SEC's website at . All of the forward-looking statements made in this press release are expressly qualified by the cautionary statements contained or referred to herein. The actual results or developments anticipated may not be realized or, even if substantially realized, they may not have the expected consequences to or effects on REGENXBIO or its businesses or operations. Such statements are not guarantees of future performance and actual results or developments may differ materially from those projected in the forward-looking statements. Readers are cautioned not to rely too heavily on the forward-looking statements contained in this press release. These forward-looking statements speak only as of the date of this press release. Except as required by law, REGENXBIO does not undertake any obligation, and specifically declines any obligation, to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Zolgensma® is a registered trademark of Novartis Gene Therapies. All other trademarks referenced herein are registered trademarks of REGENXBIO. CONTACTS: Dana Cormack Corporate Communications [email protected] George E. MacDougall Investor Relations [email protected] SOURCE REGENXBIO Inc. 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Gene TherapyClinical ResultPhase 3

100 Deals associated with Surabgene Lomparvovec

R&D Status

10 top R&D records.

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Indication	Highest Phase	Country/Location	Organization	Date
Wet age-related macular degeneration	Phase 3	Germany	AbbVie, Inc.	28 Dec 2021
Wet age-related macular degeneration	Phase 3	Hungary	AbbVie, Inc.	28 Dec 2021
Wet age-related macular degeneration	Phase 3	France	AbbVie, Inc.	28 Dec 2021
Wet age-related macular degeneration	Phase 3	United Kingdom	AbbVie, Inc.	28 Dec 2021
Wet age-related macular degeneration	Phase 3	Japan	AbbVie, Inc.	28 Dec 2021
Wet age-related macular degeneration	Phase 3	United States	AbbVie, Inc.	28 Dec 2021
Wet age-related macular degeneration	Phase 3	Puerto Rico	AbbVie, Inc.	28 Dec 2021
Wet age-related macular degeneration	Phase 3	Italy	AbbVie, Inc.	28 Dec 2021
Wet age-related macular degeneration	Phase 3	Spain	AbbVie, Inc.	28 Dec 2021
Wet Macular Degeneration	Phase 3	United States	AbbVie, Inc.	29 Dec 2020

Clinical Result

Indication

Phase

Evaluation

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Study	Phase	Population	Analyzed Enrollment	Group	Results	Evaluation	Publication Date


NCT04514653 (AAVIATE, Corporate Publications) Manual	Phase 2	Wet Macular Degeneration	106	ABBV-RGX-314	(cqxftxozoo) = in the study eye were mild or moderate and included conjunctival hemorrhage, increased intraocular pressure, episcleritis, and conjunctival hyperemia. mnwwyuzqwc (fjbmqxaiha ) View more	Positive	16 Jan 2024
EURETINA2023	Not Applicable	Diabetic macular oedema	-	RGX-314 at a dose level of 2.5 x E11 GC/eye	rtuaevifpe(baeenxiecj) = three cases of mild intraocular inflammation through 6 months which resolved with topical corticosteroids nupifswnwd (apenlazisc ) View more	-	05 Oct 2023
				RGX-314 at an increased dose level of 5 x E11 GC/eye
EURETINA2023	Not Applicable	Age Related Macular Degeneration	-	RGX-314	wjdeznmbxw(zszmvhyppj) = No new drug-related ocular adverse events (AEs) have been reported in Cohorts 1-4 ecsbvlaygv (ysxnjutfbb ) View more	-	05 Oct 2023
NCT04567550 (ALTITUDE, Corporate Publications) Manual	Phase 2	Diabetic Retinopathy	60	RGX-314	(kejlawcbpn) = vyjasorlvo cbpbbtagox (xxxundovlr ) View more	Positive	02 Nov 2022
				control	(kejlawcbpn) = xpzekorghv cbpbbtagox (xxxundovlr ) View more
NCT04567550 (ALTITUDE, Corporate Publications) Manual	Phase 2	Diabetic Retinopathy	20	RGX-314	(hdexywovce) = wsblxoojbi cbnuapspfl (ybzpcbaukp ) View more	Positive	13 Sep 2022
				Observational	(hdexywovce) = dmeylrsdlk cbnuapspfl (ybzpcbaukp ) View more
NCT04514653 (AAVIATE, PRNewswire) Manual	Phase 2	Wet age-related macular degeneration	19	RGX-314	(chmoovgblm) = lwbexsktrx ahknhnqcqx (izzeszburl ) View more	Positive	01 Oct 2021
				Ranibizumab	(chmoovgblm) = ffugkjlatd ahknhnqcqx (izzeszburl ) View more
EURETINA2021	Not Applicable	Wet age-related macular degeneration	-	RGX-314	(vsatgpmpst) = 20 serious adverse events (SAEs) reported in 13 patients, including one possibly drug-related SAE of significant decrease in vision in Cohort 5 rropbgmrob (ovfiwijsbk ) View more	-	01 Sep 2021

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