A Gene Therapy Study in Patients With Gaucher Disease Type 1 (GALILEO-1)

May 6, 2026 updated by: Spur Therapeutics

A Phase 1, Open-label, Safety, Tolerability, and Efficacy Study of FLT201 in Adult Patients With Gaucher Disease Type 1 (GALILEO-1)

This study is a first-in-human, open-label, safety, tolerability, and efficacy study in adult patients with Gaucher disease Type 1. The aims are to investigate the safety/tolerability and efficacy of FLT201, and to investigate the relationship of FLT201 dose to augmentation of residual glucocerebrosidase (GCase) expression (activity and concentration), and its potential to improve the clinical phenotype by reduction and prevention of cellular accumulation of GCase substrate.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
10

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Brazil
      • Porto Alegre, Brazil
        • Hospital de Clinicas de Porto Alegre (HCPA)
  • Germany
      • Höchheim, Germany
        • SphinCS
  • Israel
      • Jerusalem, Israel
        • Shaare Zedek Medical Center
      • Petah Tikva, Israel
        • Rabin Medical Center - PPDS
      • Tel Aviv, Israel
        • Tel Aviv Sourasky Medical Center
  • Spain
      • Zaragoza, Spain
        • Hospital Quironsalud Zaragoza
  • United Kingdom
      • London, United Kingdom
        • Royal Free Hospital
      • Salford, United Kingdom
        • Salford Royal Hospital
  • United States
    • California
      • Los Angeles, California, United States, 90027
        • Kaiser Permanente
    • Virginia
      • Fairfax, Virginia, United States, 22030-6066
        • Lysosomal Rare Disorders Research and Treatment Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Adult ≥ 18 years of age.
  2. Diagnosis of Gaucher disease Type 1 with deficient GCase enzyme activity ≤30% of normal in leukocytes at diagnosis.
  3. All female patients of childbearing potential must not be lactating and must have a negative serum pregnancy test at screening and confirmed negative by urine testing prior to dosing on Day 1. Female patients of childbearing potential and male patients must be willing to follow protocol guidelines for barrier protection/contraception.
  4. Able to give full informed consent for the trial.
  5. Treatment status at screening (screening period is 16 weeks):

Treated with either enzyme replacement therapy (ERT) or substrate reduction therapy (SRT) and started this treatment at least 2 years prior to dosing with no change in regimen for the prior 3 months. ERT dose ≥15 U/kg and ≤60 U/kg every other week.

Exclusion Criteria:

  1. Diagnosed or suspected Type 2 or Type 3 Gaucher disease (including any patient with eye movement abnormality on clinical examination).
  2. Positive for neutralising antibodies to AAVS3 at screening.
  3. Evidence of significant and persistent liver dysfunction at Screening defined as >1.5 x upper limit of normal (ULN) in alanine aminotransferase (ALT), aspartate aminotransferase (AST) or total bilirubin.

  4. Evidence of any of the following at screening:

    1. Hb <8 g/dL.
    2. Platelets <45,000/mm3.
    3. Pulmonary hypertension.
    4. New osteonecrosis within 12 months of screening.
    5. Fragility fracture or bone crisis within 12 months of screening.
  5. Hepatitis B surface antigen (HBsAg) positive at screening.
  6. Hepatitis C antibody (Hep C Ab) positive and hepatitis C RNA polymerase chain reaction (PCR) (as follow-up test if Hep C Ab-positive)-positive at screening.
  7. Cytomegalovirus (CMV) immunoglobulin G (IgG) and CMV DNA PCR-positive at screening.
  8. Human immunodeficiency virus (HIV)-1 or -2 antibody positive at screening.
  9. Patient has received live attenuated vaccination within 12 weeks prior to screening or intends to receive such vaccination during the study.
  10. History of clinically-advanced liver disease e.g. cirrhosis, portal hypertension.
  11. History of bone marrow transplant.
  12. History of splenectomy (partial or total).
  13. History of splenic infarct within 12 months of screening.
  14. History of receiving any gene transfer medicinal product.
  15. History of receiving any investigational therapy for Gaucher disease within 60 days of screening.
  16. Participation in any other clinical study of an investigational medicinal product (IMP), and/or receiving any other IMP during the study.
  17. History of idiopathic thrombocytopaenic purpura, thrombotic thrombocytopaenic purpura, thrombocytopaenia, anaemia, hepatomegaly, splenomegaly, and/or osteoporosis, unrelated to Gaucher disease.
  18. History of, or active neoplastic disease within 5 years of screening (except for basal or squamous cell carcinoma of the skin or carcinoma in situ which has been definitively treated).
  19. Subjects with uncontrolled cardiac failure, unstable angina, myocardial infarction, pulmonary hypertension or cardiac presentations including cardiac instability deemed significant by the investigator in the past 6 months
  20. History of acute myocarditis or presence of acute myocarditis during screening.
  21. History of substance abuse, including alcohol abuse or alcohol dependence.
  22. Known or suspected intolerance, hypersensitivity or contraindication to the investigational medicinal product (IMP) and non-investigational medicinal products (NIMPs) or their excipients.
  23. History of anaphylaxis or infusion related reactions to ERT.
  24. Contraindication(s) to MRI. (e.g. ferromagnetic metallic implants, some types of pacing and defibrillator devices, nerve stimulators).
  25. Any clinical condition (medical or psychiatric) that, in the opinion of the investigator, could jeopardise safety or compromise ability of the patient to participate in this study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: FLT201 (4.5 × 10^11 vg/kg)
FLT201 is an advanced therapy investigational medicinal product (ATIMP) administered as a single intravenous infusion.
Genetic: FLT201
FLT201 is a replication-incompetent single-stranded (ss) recombinant adeno-associated virus (AAV) vector. The vector is composed of a ss DNA genome packaged in an AAV-derived protein capsid.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Number of Participants With Treatment-emergent Adverse Events Over Time
Time Frame: Day 1 (dosing) through transfer to the long-term follow-up (LTFU) study, which was up to 15 months.
Treatment-emergent adverse events (including dose-limiting toxicities), with AEs graded as mild/moderate/severe.
Day 1 (dosing) through transfer to the long-term follow-up (LTFU) study, which was up to 15 months.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change From Baseline in Lyso-Gb1 in Plasma
Time Frame: From baseline to week 38/9 months.
Change from baseline to week 38/month 9 of lyso-Gb1 in plasma.
From baseline to week 38/9 months.
Change From Baseline in Spleen Volume Measured by MRI
Time Frame: From baseline to week 38/9 months.
Change from baseline to week 38/month 9 in spleen volume measured by MRI.
From baseline to week 38/9 months.
Change From Baseline in Liver Volume Measured by MRI
Time Frame: From baseline to week 38/9 months.
Change from baseline to week 38/month 9 in liver volume measured by MRI.
From baseline to week 38/9 months.
Change From Baseline in Hemoglobin
Time Frame: From baseline to week 38/9 months.
Change from baseline to week 38/month 9 in hemoglobin.
From baseline to week 38/9 months.
Change From Baseline in Platelet Count
Time Frame: From baseline to week 38/9 months.
Change from baseline to week 38/month 9 in platelet count.
From baseline to week 38/9 months.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Spur Therapeutics

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
April 15, 2022

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 4, 2024

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 4, 2024

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 28, 2022

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 8, 2022

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
April 13, 2022

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 2, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 6, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • FLT201-01

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

Yes

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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