Glycogen Storage Disease Type II

- Recently presented data demonstrated sustained functional improvement with DYNE-251 treatment through 18 months - - Data from the fully enrolled DELIVER registrational expansion cohort is planned for late 2025 - April 24, 2025 -- Dyne Therapeutics, Inc. (Nasdaq: DYN), a clinical-stage company focused on advancing life-transforming therapeutics for people living with genetically driven neuromuscular diseases, today announced that the European Commission (EC) has granted orphan drug designation for DYNE-251 for the treatment of Duchenne muscular dystrophy (DMD). DYNE-251 is being evaluated in the Phase 1/2 DELIVER global clinical trial in individuals with DMD who are amenable to exon 51 skipping. Long-term clinical data from the ongoing DELIVER trial of DYNE-251 that demonstrated unprecedented and sustained functional improvement at the selected registrational dose were presented in March at the 2025 Muscular Dystrophy Association (MDA) Clinical & Scientific Conference. Functional assessments in the DELIVER trial include Stride Velocity 95th Centile (SV95C), an objective digital outcome that is accepted as a primary endpoint for DMD clinical trials in Europe. “Our recent long-term DELIVER trial results demonstrated clinically relevant and sustained functional improvement through 18 months, including as assessed by SV95C, which may support a strong rationale for regulatory approval in Europe,” said Doug Kerr, MD, PhD, chief medical officer of Dyne. “We are pleased that the EC has granted orphan drug designation to DYNE-251, reinforcing our belief that our next-generation exon 51 skipping investigational therapy for DMD may be able to bring clinically meaningful functional improvement to those living with this devastating disease. With full enrollment of the registrational expansion cohort in the DELIVER trial complete, we look forward to sharing data from this cohort in late 2025 and the potential to move forward with our first regulatory submissions in early 2026.” The EC grants orphan drug designation to drugs and biologics intended for the treatment, diagnosis or prevention of rare, life-threatening or chronically debilitating diseases or conditions that affect fewer than five in 10,000 people in the European Union (EU). Orphan designation provides companies with certain benefits, including reduced regulatory fees, clinical protocol assistance, research grants and the potential for up to 10 years of market exclusivity in the EU if approved. DYNE-251 was also granted U.S. Food and Drug Administration (FDA) orphan drug and rare pediatric disease designations in March 2023. Key Milestones for the DELIVER Trial Dyne continues to pursue expedited approval pathways globally for DYNE-251 in patients with DMD who are amenable to exon 51 skipping. Dyne has fully enrolled the registrational expansion cohort of 32 patients as part of the DELIVER trial. Data from this cohort are planned for late 2025. Dyne anticipates filing a Biologics License Application (BLA) submission for US accelerated approval in early 2026. DELIVER is a randomized, placebo-controlled, double-blind, Phase 1/2 clinical trial evaluating the safety, tolerability and efficacy of DYNE-251 in patients with Duchenne muscular dystrophy (DMD) who are amenable to exon 51 skipping. The multiple ascending dose (MAD) portion of the study resulted in the selection of a registrational dose and regimen of 20 mg/kg every four weeks. A registrational expansion cohort to support potential regulatory submissions for expediated approvals, including accelerated approval in the U.S., is fully enrolled. The primary endpoint for this cohort is the change from baseline in dystrophin protein levels as measured by Western blot. For more information on the DELIVER trial, visit clinicaltrials.gov (NCT05524883) and euclinicaltrials.eu (2023-510351-31-00). DYNE-251 is an investigational therapeutic being evaluated in the Phase 1/2 global DELIVER clinical trial for people living with DMD who are amenable to exon 51 skipping. DYNE-251 consists of a phosphorodiamidate morpholino oligomer (PMO) conjugated to a fragment antibody (Fab) that binds to the transferrin receptor 1 (TfR1), which is highly expressed on muscle. It is designed to enable targeted muscle tissue delivery and promote exon skipping in the nucleus, allowing muscle cells to create internally shortened, near full-length dystrophin protein, with the goal of stopping or reversing disease progression. DYNE-251 has been granted fast track, orphan drug and rare pediatric disease designations by the U.S. Food and Drug Administration for the treatment of DMD mutations amenable to exon 51 skipping. In addition to DYNE-251, Dyne is building a global DMD franchise and has preclinical programs targeting other exons, including 53, 45 and 44. DMD is a rare disease caused by mutations in the gene that encodes for dystrophin, a protein critical for the normal function of muscle cells. These mutations, the majority of which are deletions, result in the lack of dystrophin protein and progressive loss of muscle function. DMD occurs primarily in males and affects an estimated 12,000 to 15,000 individuals in the U.S. and 25,000 in Europe. Loss of strength and function typically first appears in pre-school age boys and worsens as they age. As the disease progresses, the severity of damage to skeletal and cardiac muscle often results in patients experiencing total loss of ambulation by their early teenage years and includes worsening cardiac and respiratory symptoms and loss of upper body function by the later teens. There is no cure for DMD, and currently approved therapies provide limited benefit. Dyne Therapeutics is discovering and advancing innovative life-transforming therapeutics for people living with genetically driven neuromuscular diseases. Leveraging the modularity of its FORCE™ platform, Dyne is developing targeted therapeutics that deliver to muscle and the central nervous system (CNS). Dyne has a broad pipeline for neuromuscular diseases, including clinical programs for myotonic dystrophy type 1 (DM1) and Duchenne muscular dystrophy (DMD), and preclinical programs for facioscapulohumeral muscular dystrophy (FSHD) and Pompe disease. 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Clinical trial of KH658 evaluates single suprachoroidal space administration of gene-therapy treatment for wet AMD CHENGDU, China and ROCKAWAY, NJ, USA I May 02, 2025 I Chengdu Origen Biotechnology Co., Ltd. (“Chengdu Origen”) and Vanotech Ltd. (“Vanotech”) announced today the first patient dosed in the VAN-2401 multi-center Phase 1 clinical trial evaluating treatment with KH658 for patients with wet Age-related Macular Degeneration (wet AMD). This multi-center, open-label, dose-escalation clinical trial in the U.S. will assess the safety, tolerability and efficacy of KH658 as a single suprachoroidal space administration of gene therapy for patients with previously treated wet AMD. KH658 is a recombinant adeno-associated virus vector that encodes a human VEGF receptor fusion protein. In preclinical studies of wet AMD disease models, suprachoroidal space administration of KH658 resulted in retention of the transgene product in the retina for prolonged periods and prevented the disease progression. These findings may indicate the potential of KH658 to offer a single administration treatment for wet AMD patients. “Dosing our first patient in the VAN-2401 Phase 1 trial is an important milestone in the advancement of KH658 by exploring the potential of single suprachoroidal space administration of gene therapy as treatment for wet AMD. KH658 is designed to deliver anti-VEGF continuously to the retina, with the potential to provide sustained levels that can control the disease,” said Avner Ingerman, M.D., Chief Medical Officer of Vanotech. “I am excited to participate as a principal investigator in this important study. Dosing the first patient is an important milestone in the development of the single-administration gene therapy approach, which may hold promise to our patients in need of frequent treatment for their retinal diseases,” said Mark Barakat, M.D., a principal investigator in the VAN-2401 Phase 1 trial, Director of Research at Retina Macula Institute of Arizona in Scottsdale Arizona. About the VAN-2401 Phase 1 Clinical Trial VAN-2401 is a Phase I, Open-label, Multicenter, Dose-Escalating Study to Evaluate the Safety and Tolerability of KH658 Gene Therapy in Participants with Neovascular Age-related Macular Degeneration. The study is expected to include approximately nine previously treated wet AMD subjects that are responsive to anti-vascular endothelial growth factor (anti-VEGF) therapy. For more information, please visit https://www.clinicaltrials.gov/study/NCT06825858 About Wet AMD Wet AMD is the rarer form of AMD, characterized by loss of vision due to abnormal blood vessel formation in and under the retina. These blood vessels tend to leak, and the fluid interferes with the normal retinal structure and function, leading to vision loss. Wet AMD is a leading cause of irreversible vision loss or blindness in the United States and Europe, especially if left untreated. It is estimated that ~1.5 million people living with wet AMD in the United States. Anti-VEGF therapies have become the standard of care for wet AMD. Anti-VEGF treatments reduce leakage and fluid accumulation, thereby restoring normal retinal architecture and function, in many patients. Anti-VEGF agents often require frequent, repeat injections to maintain efficacy and control the disease. About Chengdu Origen and Vanotech Chengdu Origen is a clinical-stage gene therapy company focused on developing gene therapy for unmet medical needs and providing meaningful clinical benefits for patients suffering from genetic and chronic diseases and has comprehensive viral vector manufacturing capabilities and infrastructure. Vanotech is operating as the sponsor-representative, and is responsible for the clinical development program of KH658 in the United States. Vanotech is also currently conducting VAN-2201, a Phase 1, multi-center, open-label, dose-escalation study in subjects with wet AMD to evaluate safety, tolerability and efficacy of a single administration of KH631. For more information, please visit https://www.clinicaltrials.gov/study/NCT05657301 . SOURCE: Chengdu Origen

ARVO and RWC abstracts feature analyses on biomarkers, mechanism of disease, patient experience and other data from IZERVAY™ (avacincaptad pegol intravitreal solution) pivotal studies TOKYO, May 1, 2025 /PRNewswire/ -- Astellas Pharma Inc. (TSE: 4503, President and CEO: Naoki Okamura, "Astellas"), maker of IZERVAY™ (avacincaptad pegol intravitreal solution), a C5 inhibitor for the treatment of geographic atrophy (GA)*, will highlight new data that enhances continued understanding of the science of GA, and the experience of patients living with the progressive disease at the Association for Research in Vision and Ophthalmology Annual Meeting (ARVO), May 4-8, Salt Lake City, Utah, and Retina World Congress (RWC), May 8-11, Fort Lauderdale, Florida. The data comprises nine abstracts, including two oral presentations, featuring analyses on biomarkers, patient experience, mechanism of disease and other insights from the GATHER Phase 3 studies of IZERVAY for the treatment of GA secondary to age-related macular degeneration (AMD). Marci English, Senior Vice President, Biopharma and Ophthalmology Development, Astellas Pharma "Recognizing the early indicators and disease pathways of geographic atrophy are critical to helping patients preserve their existing vision for longer. We look forward to engaging with the retina community at ARVO and RWC to discuss the latest scientific insights in early diagnosis and effective management of GA." Research highlights include: An oral presentation on the structure-function relationship between baseline central subfield ellipsoid zone (EZ) integrity and visual acuity at baseline and future vision loss An oral presentation on baseline EZ integrity features linked to GA progression in eyes with differential shifts in GA growth rate Multiple posters evaluating imaging data from the GATHER1 and GATHER2 studies, which link structure and function in GA Two preclinical posters with structural insights refining the mechanism of action, as well as pharmacokinetics and pharmacodynamics, of avacincaptad pegol (ACP) Data from qualitative studies assessing the experience of patients with GA in the U.S., Spain, Germany and France, including the impact of disease symptoms on health-related quality of life (HRQoL) and coping mechanisms used to manage symptoms of GA Astellas Presentations at 2025 ARVO Annual Meeting Astellas Presentations at RWC 2025 Meeting *avacincaptad pegol intravitreal solution (ACP) is approved for use as IZERVAY™ only in the U.S. About IZERVAY ™ (avacincaptad pegol intravitreal solution) INDICATION AND IMPORTANT SAFETY INFORMATION What is IZERVAY™? IZERVAY (avacincaptad pegol intravitreal solution) is a prescription eye injection, used to treat geographic atrophy (GA), the advanced form of dry age-related macular degeneration (AMD). What is the most important information I should know about IZERVAY? Do NOT receive IZERVAY if you: Have an infection in or around your eye Have active swelling in or around your eye that may include pain and redness IZERVAY can cause serious side effects: Eye injections like the one for IZERVAY can cause an eye infection (endophthalmitis) or separation of layers of the retina (retinal detachment). Call your healthcare provider right away if you have redness of the eye, eye pain, increased discomfort, worsening eye redness, blurred or decreased vision, an increased number of small specks floating in your vision, flashes of light, or increased sensitivity to light. There is a risk of developing wet AMD with IZERVAY. You should report any symptoms (visual distortions such as straight lines seeming bent, deterioration in vision, dark spots, loss of central vision) to your healthcare provider to monitor. IZERVAY may cause a temporary increase in eye pressure after the injection. Your healthcare provider will monitor this after each injection. Before receiving IZERVAY tell your healthcare provider about all of your medical conditions including if you: Have a history of seeing flashes of light or small specks floating in your vision and if you have a sudden increase of size and number of these specks. Have high pressure in the eye or if you have glaucoma. Are pregnant or breastfeeding, think you may be pregnant, or are planning to have a baby, ask your doctor for advice before taking this medicine. Are taking any medications, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Tell your healthcare provider about any medicine you take. What should I avoid while receiving IZERVAY? Your vision may be impaired after receiving an eye injection or after an eye exam. Do not drive or use machinery until your vision has recovered sufficiently. What are the most common side effects of IZERVAY? Blood in the white of the eye Increase in eye pressure Blurred vision Wet age-related macular degeneration These are not all the possible side effects of IZERVAY. Tell your healthcare provider about any side effect that bothers you or that does not go away. Call your healthcare provider for medical advice about side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit , or call 1-800-FDA-1088. Please see full Prescribing Information for more information. About Geographic Atrophy Age-related macular degeneration (AMD) is the major cause of moderate and severe loss of central vision in aging adults, affecting both eyes in the majority of patients. The macula is a small area in the central portion of the retina responsible for central vision. As AMD progresses, the loss of retinal cells and the underlying blood vessels in the macula results in marked thinning and/or atrophy of retinal tissue. Geographic atrophy, associated with AMD, leads to further irreversible loss of vision in these patients. About the GATHER Clinical Trials IZERVAY met its primary endpoint in the GATHER1 (NCT02686658) clinical trial and the GATHER2 (NCT04435366) clinical trial, both of which were randomized, double-masked, sham-controlled, multicenter Phase 3 clinical trials. These trials evaluated the safety and efficacy of monthly 2 mg intravitreal administration of IZERVAY in patients with GA secondary to AMD. For the first 12 months in both trials, patients were randomized to receive either IZERVAY 2 mg or sham monthly. There were 286 participants enrolled in GATHER1 and 448 participants enrolled in GATHER2. The primary efficacy endpoints in both pivotal studies were based on GA area measured by fundus autofluorescence at three time points: baseline, month 6, and month 12. Safety was evaluated in over 700 patients with GA across the two trials. In year 2 of the GATHER2 study, patients treated with IZERVAY in year 1 were re-randomized to receive either IZERVAY dosed monthly (EM, n=96) or every other month (EOM, n=93); patients who received sham in year 1 continued to receive sham in year 2 (n=203). IZERVAY is continuing to be evaluated in an open-label extension study. About Astellas Astellas is a global life sciences company committed to turning innovative science into VALUE for patients. We provide transformative therapies in disease areas that include oncology, ophthalmology, urology, immunology and women's health. Through our research and development programs, we are pioneering new healthcare solutions for diseases with high unmet medical need. Learn more at . Cautionary Notes In this press release, statements made with respect to current plans, estimates, strategies and beliefs and other statements that are not historical facts are forward-looking statements about the future performance of Astellas. These statements are based on management's current assumptions and beliefs in light of the information currently available to it and involve known and unknown risks and uncertainties. A number of factors could cause actual results to differ materially from those discussed in the forward-looking statements. Such factors include, but are not limited to: (i) changes in general economic conditions and in laws and regulations, relating to pharmaceutical markets, (ii) currency exchange rate fluctuations, (iii) delays in new product launches, (iv) the inability of Astellas to market existing and new products effectively, (v) the inability of Astellas to continue to effectively research and develop products accepted by customers in highly competitive markets, and (vi) infringements of Astellas' intellectual property rights by third parties. Information about pharmaceutical products (including products currently in development) which is included in this press release is not intended to constitute an advertisement or medical advice. Contacts for inquiries or additional information: Beth Stevenson, US Therapeutic Area Communications +1-910-200-4272 [email protected] Astellas Pharma Inc. Corporate Communications +81-3-3244-3201 SOURCE Astellas Pharma Inc. 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