FDA Lifts Hold on Rocket’s Gene Therapy
FDA has lifted a clinical hold on Rocket Pharmaceuticals’ pivotal Phase 2 trial of RP-A501, an investigational gene therapy for Danon disease, allowing the study to resume less than three months after being paused. The hold followed the death of a participant who experienced serious complications during the study.
The agency gave the company the green light to proceed after approving Rocket’s proposed protocol adjustments, including a recalibrated starting dose in three sequentially treated patients, each with a minimum four-week interval between dosing, according to the company. The modified dose reflects the lower end of the ranges shown to be effective in an earlier Phase 1 study while optimizing the safety profile, it says.
RP-A501 is described as a one-time gene therapy candidate that uses an AAV9 vector to deliver a healthy version of the LAMP2B gene, which is mutated in Danon disease, a rare and often fatal inherited disorder that primarily affects the heart and is estimated to impact 15,000 to 30,000 people across the U.S. and Europe. Currently, heart transplantation is the only available treatment.