#389 From Natural History to Gene Therapy: The Future of Danon Disease Research

Danon disease is a rare, X-linked metabolic disorder that strikes at the heart of cellular function. Caused by mutations in the LAMP2 gene, it disrupts the body’s ability to clear cellular waste (autophagy), leading to devastating and often life-threatening cardiac complications. Because the disease is so rare, understanding its natural progression, and how to stop it, is the current "North Star" for researchers and clinicians alike.

In this episode, we are joined by two world-renowned experts to discuss the current landscape of Danon disease research: Dr. Barry Greenberg and Dr. Cordula Wolf. We dive deep into the mechanics of the disease, the importance of the LAMPLIGHT-NH observational study, and the groundbreaking LAMPLIGHT-2 interventional gene therapy trial.

Meet the Experts

• Dr. Barry Greenberg (US): A pioneer in heart failure research and Director of the Advanced Heart Failure Program at UC San Diego.
• Dr. Cordula Wolf (Germany): A leading expert in pediatric cardiology and congenital heart defects, specializing in the clinical management of metabolic cardiomyopathies.

Understanding the Disease Course

Danon disease is fundamentally a "traffic jam" at the cellular level. Without a functional LAMP2 gene, lysosomes cannot fuse with autophagosomes, leading to a buildup of cellular debris.

• The Impact: This manifests primarily as hypertrophic cardiomyopathy, skeletal muscle weakness, and intellectual disability.
• The Cardiac Threat: For many patients, especially males, the disease progresses rapidly toward end-stage heart failure or sudden cardiac death, often requiring heart transplants at a young age.

Resources & Clinical Trial Links

If you are treating a patient with a confirmed or suspected LAMP2 pathogenic variant, your referral to a study site can change the trajectory of their care.

• Observational (LAMPLIGHT-NH)
  • Best for gathering data without changing current management.
  • Natural History Study (LAMPLIGHT-NH): ClinicalTrials.gov NCT06214507
• Interventional (LAMPLIGHT-2)
  • A Phase 2 trial for those meeting specific cardiac and age requirements.
  • Interventional Study (RP-A501): ClinicalTrials.gov NCT06092034

• Official Study Website: LAMPLIGHT Studies

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