Gene Therapy Setback Shakes Rocket Pharmaceuticals' Future
Rocket Pharmaceuticals faces a major challenge as a clinical trial for its gene therapy in Danon disease is halted following a patient's fatal adverse reaction. Discover the implications for the company and the gene therapy field.
Bill McColl brings over 25 years of experience as a senior producer and writer across TV, radio, and digital platforms, leading news teams to cover some of the most impactful stories.
Key Insights
- Rocket Pharmaceuticals paused its gene therapy trial for Danon disease after a patient experienced a fatal adverse event.
- The patient faced complications due to capillary leak syndrome, resulting in death from an acute systemic infection.
- The incident caused Rocket Pharmaceuticals' stock to plunge to historic lows, reflecting investor concerns.
Shares of Rocket Pharmaceuticals (RCKT) experienced a dramatic decline after the company announced it had suspended its Phase 2 clinical trial investigating the gene therapy RP-A501 for Danon disease. This decision followed the death of a patient who suffered a serious adverse event during the trial.
The company revealed that the patient encountered severe complications related to capillary leak syndrome, ultimately succumbing to an acute systemic infection. Rocket Pharmaceuticals is undertaking a thorough root cause investigation, focusing on the recently introduced immune suppression agent added to the pre-treatment protocol intended to counteract complement activation observed in some participants.
Following this tragic event, the Food and Drug Administration (FDA) imposed a clinical hold on the trial, and Rocket Pharmaceuticals has not provided a timeline for when the Phase 2 study might resume or conclude.
Market reaction was swift, with Rocket Pharmaceuticals' shares plummeting by 60% in early trading and declining approximately 80% since the start of the year, signaling significant investor apprehension.

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