Le Lézard
Classified in: Health, Science and technology
Subject: FDA

FDA Approves Targeted Treatment for Rare Duchenne Muscular Dystrophy Mutation


SILVER SPRING, Md., Aug. 12, 2020 /PRNewswire/ -- Today, the U.S. Food and Drug Administration granted accelerated approval to Viltepso (viltolarsen) injection for the treatment of Duchenne muscular dystrophy (DMD) in patients who have a confirmed mutation of the DMD gene that is amenable to exon 53 skipping. This is the second FDA-approved targeted treatment for patients with this type of mutation. Approximately 8% of patients with DMD have a mutation that is amenable to exon 53 skipping.

"The FDA is committed to fostering drug development for serious neurological disorders like Duchenne muscular dystrophy," said Billy Dunn, M.D., director of the Office of Neuroscience in the FDA's Center for Drug Evaluation and Research. "Today's approval of Viltepso provides an important treatment option for Duchenne muscular dystrophy patients with this confirmed mutation."

DMD is a rare genetic disorder characterized by progressive muscle deterioration and weakness. It is the most common type of muscular dystrophy. DMD is caused by mutations in the DMD gene that results in an absence of dystrophin, a protein that helps keep muscle cells intact. The first symptoms are usually seen between three and five years of age and worsen over time. DMD occurs in approximately one out of every 3,600 male infants worldwide; in rare cases, it can affect females.

Viltepso was evaluated in two clinical studies with a total of 32 patients, all of whom were male and had genetically confirmed DMD. The increase in dystrophin production was established in one of those two studies, a study that included 16 DMD patients, with 8 patients receiving Viltepso at the recommended dose. In the study, dystrophin levels increased, on average, from 0.6% of normal at baseline to 5.9% of normal at week 25.

The FDA concluded that the applicant's data demonstrated an increase in dystrophin production that is reasonably likely to predict clinical benefit in patients with DMD who have a confirmed mutation of the dystrophin gene amenable to exon 53 skipping. A clinical benefit of the drug has not been established. In making this decision, the FDA considered the potential risks associated with the drug, the life-threatening and debilitating nature of the disease, and the lack of available therapies.

As part of the accelerated approval process, the FDA is requiring the company to conduct a clinical trial to confirm the drug's clinical benefit. The ongoing study is designed to assess whether Viltepso improves the time to stand for DMD patients with this confirmed mutation. If the trial fails to verify clinical benefit, the FDA may initiate proceedings to withdraw approval of the drug.

The most common side effects observed in DMD patients (pooled from the two studies) treated with 80 mg/kg once a week were: Upper respiratory tract infection, injection site reaction, cough and fever.

Although kidney toxicity was not observed in the Viltepso clinical studies, the clinical experience with Viltepso is limited, and kidney toxicity, including potentially fatal glomerulonephritis, has been observed after administration of some antisense oligonucleotides. Kidney function should be monitored in patients taking Viltepso.

Viltepso was approved under the FDA's accelerated approval pathway, which provides for the approval of drugs that treat serious or life-threatening diseases and generally offer a meaningful advantage over existing treatments. Approval under this pathway can be based on adequate and well-controlled studies showing the drug has an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit to patients (i.e., how patients feel or function or whether they survive). This pathway provides earlier patient access to promising new drugs while the company conducts clinical trials to verify the predicted clinical benefit.

The FDA granted this application Priority Review designation.

The FDA is granting the approval to NS Pharma, Inc.

Additional Resources:

Media Contact: Lindsey O'Keefe, 240-731-9982
Consumer Inquiries: Email or 888-INFO-FDA

The FDA, an agency within the U.S. Department of Health and Human Services, protects the public health by assuring the safety, effectiveness, and security of human and veterinary drugs, vaccines and other biological products for human use, and medical devices. The agency also is responsible for the safety and security of our nation's food supply, cosmetics, dietary supplements, products that give off electronic radiation, and for regulating tobacco products.

U.S. Food and Drug Administration (FDA) logo (PRNewsfoto/FDA)

SOURCE U.S. Food and Drug Administration


These press releases may also interest you

at 00:25
Shanghai Junshi Biosciences Co., Ltd ("Junshi Biosciences," HKEX: 1877; SSE: 688180), a leading innovation-driven biopharmaceutical company dedicated to the discovery, development, and commercialization of novel therapies, announced its financial...

28 mar 2024
The report titled "Central Lab Market by Service Type (Anatomic Pathology/Histology, Biomarker Services, Genetic Services), Phase (Phase 1, Phase 2, Phase 3), Therapeutic Area, End-use - Global Forecast 2024-2030" is now available on...

28 mar 2024
The report titled "Personalized Nutrition Market by Measurement Type (Active Measurement, Standard Measurement), Application (Indication-based, Standard Supplements), Distribution Channel, End-Use - Global Forecast 2024-2030" is now available on...

28 mar 2024
The report titled "Carbon Dioxide Incubator Market by Product (Air Jacketed CO2 Incubators, Direct Heat CO2 Incubators, Water Jacketed CO2 Incubators), Capacity (100-200 Litre, Above 200 Litre, Below 100 Litre), Application, End User - Global...

28 mar 2024
The "Global Clinical In Vitro Diagnostic Medical Laboratory Services Market: Strategy & Trends with Volume & Price Forecasts by Chemistry, Hematology, Microbiology, Pathology, Covid-19, and Molecular Dx by Country. Updated with Impact of COVID-19"...

28 mar 2024
The "Molecular Diagnostics at the Point of Care. By Application, Technology, Place, Product and by Country. With Executive Guides and Customization 2023 - 2027 " report has been added to  ResearchAndMarkets.com's offering. Infectious disease Dx is...



News published on and distributed by: