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RP-A501

Phase 2

Danon Disease | Gene therapy | Rare Disease |Rocket Pharmaceuticals, Inc.|Last Updated: May 4, 2026

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials1
Total Enrollment14

FDA Designations

RMATORPHAN_DRUGRARE_PEDIATRIC_DISEASE

Clinical trial landscape

RP-A501 · 1 trial · 1 indication

Phase 2 1
NCT06092034A Gene Therapy Study of RP-A501 in Male Patients With Danon DiseaseDanon Disease
RECRUITING14 Analytics
PHASE2RECRUITING
A Gene Therapy Study of RP-A501 in Male Patients With Danon Disease
Danon DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Evaluation of efficacy via primary endpoint comprised of LAMP2 myocardial tissue expression and left ventricular mass index
12 Months post-infusion

Increase of myocardial tissue expression of LAMP2 protein and decrease in left ventricular mass index (LVMI).

Secondary Endpoints

Evaluation of efficacy via components of the primary endpoint - LAMP2
12 months post infusion
Evaluation of efficacy via components of the primary endpoint - Left Ventricular Mass Index (LVMI)
12 months post infusion
Evaluation of efficacy via biomarker evidence of myocardial injury - High Sensitivity Troponin I (hsTnI)
12 months post infusion
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
RP-A501EXPERIMENTALOne planned dose of RP-A501 in cohorts of subjects with a confirmed diagnosis of Danon Disease.

Interventions

NameTypeDescription
RP-A501GENETICRP-A501 is a gene therapy product consisting of a rAAV9 capsid containing the human LAMP2B transgene which will be administered as a single IV infusion.
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Eligibility Criteria

Age Range8 Years to N/A
SexMALE
Healthy VolunteersNo
Study Sites6

Key Inclusion Criteria: 1. Documentation of a pathogenic or likely pathogenic variant of the LAMP2 gene. 2. Male. 3. Age ≥8 years. 4. Evidence of left ventricular hypertrophy with preserved systolic function phenotype as defined by each of the following: 1. Abnormal thickening of Left ventricul...

Countries:United StatesGermanyItalyUnited Kingdom
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Frequently asked questions about RP-A501

What is RP-A501 used for?

RP-A501 is an investigational gene therapy being developed for the treatment of Danon Disease, a rare genetic condition. It is currently in Phase 2 clinical development and has not been approved by the FDA. The therapy is being studied in male patients with the disease.

What does RP-A501 target?

RP-A501 is a gene therapy designed to address the underlying genetic cause of Danon Disease. It is intended to deliver a functional gene to cells to compensate for the defective gene responsible for the condition. The specific molecular target is not disclosed in the available information.

Who is developing RP-A501?

RP-A501 is being developed by Rocket Pharmaceuticals, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol RCKT. The company is conducting clinical trials to evaluate the safety and efficacy of this gene therapy for Danon Disease.

What phase is RP-A501 in?

RP-A501 is currently in Phase 2 clinical development. It is an investigational drug, meaning it has not yet received FDA approval. The ongoing Phase 2 trial is recruiting participants to further assess the therapy's effects in patients with Danon Disease.

What clinical trials is RP-A501 in?

RP-A501 is being studied in a Phase 2 clinical trial with the identifier NCT06092034. This trial is titled 'A Gene Therapy Study of RP-A501 in Male Patients With Danon Disease' and is currently recruiting participants in the United States, Germany, Italy, and the United Kingdom. The trial aims to enroll 14 male patients aged 8 years and older.

Has RP-A501 received FDA designations?

RP-A501 has received several FDA designations, including Regenerative Medicine Advanced Therapy (RMAT), Orphan Drug designation, and Rare Pediatric Disease designation. These designations are intended to support the development of therapies for serious or life-threatening conditions with unmet medical needs.