Recent Updates
Recently added Catalysts

ST-920

Phase 1

Fabry Disease | Monoclonal antibody | Rare Disease |Sangamo Therapeutics, Inc.|Trials Updated: Apr 14, 2026

ST-920 development status

Highest phase Phase 1
Registered trials 2 across 1 sponsor since Aug 2019

ST-920 target and mechanism

Molecular targetα-Gal A
Target classEnzyme
ModalityMonoclonal antibody

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment36

FDA Designations

No designations recorded

ST-920 clinical trials

ST-920 · 1 trial · 1 indication

Phase 1 1
NCT04046224Dose-Ranging Study of ST-920, an AAV2/6 Human Alpha Galactosidase A Gene Therapy in Subjects With Fabry Disease (STAAR)Fabry Disease
COMPLETED36 Analytics
PHASE1COMPLETED
Dose-Ranging Study of ST-920, an AAV2/6 Human Alpha Galactosidase A Gene Therapy in Subjects With Fabry Disease (STAAR)
Fabry DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence of Treatment-emergent Adverse Events (TEAEs) - All
Up to 12 months after the ST-920 infusion

All incidences of Treatment-Emergent Adverse Events (TEAEs) in subjects who receive ST-920 as assessed by Common Terminology Criteria for Adverse Events (CTCAE)

Incidence of Treatment-emergent Adverse Events (TEAEs) - Related to ST-920
Up to 12 months post ST-920 infusion

Incidences of Treatment-Emergent Adverse Events (TEAEs) directly related to ST-920 in subjects who receive ST-920 as assessed by Common Terminology Criteria for Adverse Events (CTCAE)

Incidence of Treatment-emergent Adverse Events (TEAEs) - Serious
Up to 12 month post ST-920 infusion

All incidences of serious Treatment-Emergent Adverse Events (TEAEs) in subjects who receive ST-920 as assessed by Common Terminology Criteria for Adverse Events (CTCAE)

Incidence of Treatment-emergent Adverse Events (TEAEs) - Any TEAEs Leading to Study Discontinuation or Withdrawal
Up to 12 month post ST-920 infusion

All incidences of Treatment-Emergent Adverse Events (TEAEs) that lead to study discontinuation or withdrawal in subjects who receive ST-920 as assessed by Common Terminology Criteria for Adverse Events (CTCAE)

Secondary Endpoints

To Assess Alpha Gal-A Activity in Plasma Over Time
up to 12 months post ST-920 infusion
Unlock Study Endpoints

Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Sequential dose escalationEXPERIMENTALST-920 is administered as a single infusion: 1. Cohort 1: 0.5e13 vg/kg 2. Cohort 2: 1.0e13 vg/kg 3. Cohort 3: 3.0e13 vg/kg 4. Cohort 4: 5.0e13 vg/kg
Expansion CohortsEXPERIMENTAL1. Anti Alpha-Gal A Antibody Positive Cohort 2. Anti Alpha-Gal A Antibody Negative Cohort 3. Female Cohort 4. Renal Cohort 5. Cardiac Cohort

Interventions

NameTypeDescription
ST-920BIOLOGICALSingle dose of investigational product ST-920
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites18

Inclusion Criteria: * ≥ 18 years of age * Documented diagnosis of Fabry disease * One or more of the following symptoms: i) cornea verticillata, ii) acroparesthesia, iii) anhidrosis, iv) angiokeratoma * Subject must be fully vaccinated (as per the Centers for Disease Control and Prevention (CDC) de...

Countries:United StatesAustraliaCanadaGermanyItalyTaiwanUnited Kingdom
Unlock Eligibility Criteria

Frequently asked questions about ST-920

What is ST-920 used for?

ST-920 is an investigational gene therapy being developed for the treatment of Fabry disease, a rare inherited disorder. It is designed to deliver a functional copy of the GLA gene to provide a sustained source of the enzyme alpha-galactosidase A. ST-920 is not yet approved for any indication and remains in clinical development.

What does ST-920 target?

ST-920 targets alpha-galactosidase A (α-Gal A), the enzyme that is deficient in people with Fabry disease. By delivering the GLA gene, ST-920 aims to enable cells to produce the missing enzyme. Alpha-galactosidase A is an enzyme target, and restoring its activity is the intended mechanism of the therapy.

Who is developing ST-920?

ST-920 is being developed by Sangamo Therapeutics, Inc., which trades on the Nasdaq under the ticker SGMO. Sangamo is a clinical-stage biotechnology company focused on genomic medicines, and ST-920 is its gene therapy candidate for Fabry disease.

What phase is ST-920 in?

ST-920 is in Phase 1 clinical development. The Phase 1 trial, known as STAAR, has been completed. ST-920 is investigational and has not been approved by the FDA or any other regulatory agency for the treatment of Fabry disease.

What clinical trials is ST-920 in?

ST-920 has been evaluated in a single Phase 1 trial, NCT04046224, titled a Dose-Ranging Study of ST-920, an AAV2/6 Human Alpha Galactosidase A Gene Therapy in Subjects With Fabry Disease (STAAR). The trial enrolled 36 participants across the United States, Australia, Canada, Germany, Italy, Taiwan, and the United Kingdom, and it is now completed.