Accelerated Approval: Nippon Shinyaku’s Viltepso Fails DMD Confirmatory Trial, Raising Questions

The Duchenne muscular dystrophy treatment missed its primary endpoint of time to stand from supine in the RACER53 study, raising more questions about using dystrophin changes to support accelerated approval and the ability of functional endpoints to detect clinical change.

Trail blazes
Viltepso followed the accelerated approval trail blazed by Exondys 51, but reported confirmatory trial results faster. • Source: Shutterstock

Nippon Shinyaku Co., Ltd.’s failed confirmatory trial for the Duchenne muscular dystrophy treatment Viltepso (viltolarsen) is sure to reignite questions about the use of dystrophin as a basis for accelerated approval, as well as the ability of selected functional endpoints to detect change in the disease.

On 27 May, Nippon Shinyaku announced that RACER53, a Phase III, placebo-controlled study of 77 boys with ambulatory DMD, failed its

Key Takeaways
  • The viltolarsen confirmatory trial failed its primary endpoint of time to stand from supine at 48 weeks.

  • RACER53 is the second confirmatory trial of a DMD accelerated approval treatment to fail its primary endpoint, and the first of three confirmatory trials for four marketed antisense oligonucleotides to report top-line results

Read the full article – start your free trial today!

Join thousands of industry professionals who rely on Pink Sheet for daily insights

  • Start your 7-day free trial
  • Explore trusted news, analysis, and insights
  • Access comprehensive global coverage
  • Enjoy instant access – no credit card required

More from Post-Marketing Regulation & Studies

More from Product Reviews