Metabolic

Glycogen Storage Disease

Also known as GSD, von Gierke disease (GSD Ia), Cori disease (GSD III), Hers disease (GSD VI)

Glycogen storage diseases (GSDs) are a group of inherited metabolic disorders caused by enzyme deficiencies in glycogen synthesis or breakdown pathways. There are over 10 recognized types affecting liver, muscle, or both.

ORPHA:657 ↗Gene G6PCGene AGLGene PYGMGene PYGLGene GBE1Prevalence 1-5 per 10,000 (Orphanet, all types combined)Onset Neonatal, Infantile, Childhood, AdultAutosomal recessive genetic (most types)

38

studies recruiting now

as of 7 Sept 2026

232

studies registered in total

as of 7 Sept 2026

12

countries with a recruiting site

as of 7 Sept 2026

21 Jan 2026

most recent study posted

among recruiting studies

Recruiting trials

Showing the 5 most recently updated recruiting studies, as recorded 7 Sept 2026. Live status on each study page.

See all 38 recruiting studies

Where recruiting studies are running

Countries with at least one recruiting site among the studies above, 7 Sept 2026. Tap a country to search trials there.

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Support

Patient organisations

Association for Glycogen Storage DiseasePatient association
Visit website ↗

Registry: GSD Registry · Join ↗. Registries connect patients to researchers and often hear about trials first.

About Glycogen Storage Disease

Glycogen storage diseases (GSDs) are a group of inherited metabolic disorders caused by enzyme deficiencies in glycogen synthesis or breakdown pathways. There are over 10 recognized types affecting liver, muscle, or both. GSD Type I (von Gierke) causes severe fasting hypoglycemia and hepatomegaly; GSD Type V (McArdle) causes exercise intolerance and muscle cramps; GSD Type III causes progressive hepatic and muscular disease. Each type requires distinct management and has separate clinical trial pathways.

Common clinical features

HypoglycemiaHepatomegalyExercise intoleranceMuscle cramps and weaknessGrowth retardationLactic acidosisHyperuricemia

From Orphanet’s phenotype annotations (CC BY 4.0). Not a complete list.

Treatments being studied

4 in clinical development, from Open Targets (CC BY 4.0). Not medical advice.

Phase 3Cipaglucosidase Alfa (Pombiliti)
Phase 3Alglucosidase Alfa (Myozyme)
Phase 3Avalglucosidase Alfa (Nexviadyme)
Phase 3Miglustat (Miglustat dipharma)

Before you apply

Things trial teams commonly ask about for Glycogen Storage Disease. Not eligibility rules; those are set by each study.

  • Specify the exact GSD type — trials are type-specific; GSD I, III, V, VI are the most common subjects of active trials
  • Fasting tolerance testing and continuous glucose monitoring data are standard baseline requirements for GSD I
  • Muscle biopsy findings and creatine kinase levels are eligibility markers for muscle-type GSDs (GSD V, GSD III)
  • GSD Ia versus Ib distinction matters — GSD Ib has neutropenia and may have different trial eligibility

Related conditions

Information, not medical advice. Trial listings are shown as recorded on ClinicalTrials.gov; whether any study is right for you is a decision for you and your clinicians, and eligibility is decided by each research team. Disease information from Orphanet (CC BY 4.0).