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GA-GCB

Phase 4FDA approved 2010

Gaucher Disease | Small molecule | Rare Disease |Takeda Pharmaceutical Company Limited|Trials Updated: Jun 26, 2025

GA-GCB development status

FDA approval Feb 26, 2010 as Vpriv
Approval holderShire Human Genetic
ApplicationBLA022575
Highest phase Phase 4 (NCT02574286)
Phase scored for TAKPhase 2
Registered trials 10 across 2 sponsors since Oct 2006

Label indication VPRIV is indicated for long-term enzyme replacement therapy (ERT) for patients with type 1 Gaucher disease. VPRIV is a hydrolytic lysosomal glucocerebroside-specific enzyme indicated for long-term enzyme replacement therapy (ERT) for patients with type 1 Gaucher disease. ( 1 ) FDA label

GA-GCB target and mechanism

ModalitySmall molecule

Also known as GA-GCB (velaglucerase alfa), gene-activated® human glucocerebrosidase, VPRIV®, velaglucerase alfa, gene-activated glucocerebrosidase, DRX008, Enzyme replacement therapy

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials7
Total Enrollment122

FDA Designations

No designations recorded

GA-GCB clinical trials

GA-GCB · 7 trials · 3 indications

Phase 3 4Phase 2 1Phase 1 2
NCT05529992A Study of Velaglucerase Alfa (VPRIV) in Chinese Children, Teenagers, and Adults With Type 1 Gaucher DiseaseGaucher Disease
COMPLETED20 Analytics
NCT01842841Multicenter Extension Study of Velaglucerase Alfa in Japanese Patients With Gaucher DiseaseGaucher Disease
COMPLETED5 Analytics
NCT01614574Study of Velaglucerase Alfa Enzyme Replacement Therapy in Japanese Patients With Gaucher DiseaseGaucher Disease
COMPLETED6 Analytics
NCT00553631Study of Gene-Activated® Human Glucocerebrosidase (GA-GCB) ERT Compared With Imiglucerase in Type I Gaucher DiseaseGaucher Disease, Type 1
COMPLETED34 Analytics
PHASE3COMPLETED
A Study of Velaglucerase Alfa (VPRIV) in Chinese Children, Teenagers, and Adults With Type 1 Gaucher Disease
Gaucher DiseaseUnlock trial analytics
PHASE3COMPLETED
Multicenter Extension Study of Velaglucerase Alfa in Japanese Patients With Gaucher Disease
Gaucher DiseaseUnlock trial analytics
PHASE3COMPLETED
Study of Velaglucerase Alfa Enzyme Replacement Therapy in Japanese Patients With Gaucher Disease
Gaucher DiseaseUnlock trial analytics
PHASE3COMPLETED
Study of Gene-Activated® Human Glucocerebrosidase (GA-GCB) ERT Compared With Imiglucerase in Type I Gaucher Disease
Gaucher Disease, Type 1Unlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of Participants With at Least One Serious Treatment-Emergent Adverse Event (TEAE)
Up to 56.2 weeks

Adverse event(AE)=any untoward medical occurrence in clinical investigation participant administered a drug;it does not necessarily have to have causal relationship with this treatment. AE can therefore be any unfavorable\&unintended sign (example,clinically significant abnormal laboratory value),symptom/disease temporally associated with use of drug whether or not it is considered related to drug. TEAE=any event emerging or manifesting at or after initiation of investigational product or any existing event that worsens in either intensity or frequency following exposure to investigational product. SAE=any untoward clinical manifestation of signs, symptoms, or outcomes(whether considered related to investigational product or not)\&at any dose: results in death,is life-threatening,requires in-patient hospitalization/prolongation of hospitalization,results in persistent/significant disability/incapacity,results in congenital abnormality/birth defect,or is an important medical event.

Number of Participants With Drug-related Adverse Events (AEs), Infusion-related AEs, and Serious AEs (SAEs)
From the day of first infusion (Week 53) up to 30 days after last infusion (approximately 107 weeks)

An AE was any noxious, pathologic, or unintended change in anatomical, physiologic, or metabolic function as indicated by physical signs, symptoms, or laboratory changes occurring in any phase of a clinical study, whether or not considered related to investigational product. A SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged in-patient hospitalization; life threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. An infusion-related AE was defined as an AE that started either during or within 12 hours after the start of the infusion and that was judged as possibly or probably related to investigational product.

Number of Participants Using Concomitant Medication
From the day of first infusion (Week 53) up to 30 days after last infusion (approximately 107 weeks)
Number of Participants With Abnormal and Clinically Significant Laboratory Test Results
From Week 65 until the end of study (Week 155)

Laboratory test results were considered abnormal and clinically significant at the discretion of the investigator.

Number of Participants With Positive Anti-Velaglucerase Alfa Antibodies
From Week 65 until the end of study (Week 155)

Serum samples were collected for all participants for determination of anti-velaglucerase alfa antibodies every 12 weeks.

Number of Severe Adverse Events (SAE)
Baseline to week 51
Number of Treatment Emergent Adverse Events (TEAE)
Baseline to week 51
Development of Anti-velaglucerase Alfa Antibody
Baseline to week51
Number of Infusion- Related Adverse Events
Baseline to week 51
Number of Patients With Concomitant Medication
Baseline to week 51
Mean Change From Baseline to Month 9 in Hemoglobin (Hgb) Concentration for Each Treatment Group.
Baseline to Month 9
Participants Who Experienced at Least One Adverse Event
Week 53

Safety was assessed throughout the study by assessments including adverse events, concomitant medication use, and vital signs. Additional safety assessments, including 12-lead ECGs, physical examinations, clinical laboratory tests and determination of the presence of anti-velaglucerase alfa antibodies. Refer to Adverse event section for further details.

Change From Baseline to 12 Months (Week 53) in Hemoglobin Concentration
Baseline, Week 53 or end of study

Hemoglobin concentration was measured as part of the hematology panel or measured separately when the hematology panel was not scheduled. Samples were measured by a central laboratory. Baseline is the modified baseline hemoglobin concentration, the average of the values from screening, baseline, and Week 1/Day 1. A positive change from baseline indicates that hemoglobin concentration increased.

Evaluation of Long Term Safety
Up to 84 months

Overall Summary of Treatment-emergent Adverse Events-Safety Population

Secondary Endpoints

Percentage of Participants With TEAEs
Up to 56.2 weeks
Percentage of Participants With Infusion-related Reactions Reported as an Adverse Event
Up to 56.2 weeks
Percentage of Participants With Development of Anti-VPRIV Antibodies and Neutralizing Antibodies at Week 53
Week 53
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Velaglucerase Alfa (VPRIV)EXPERIMENTALParticipants received VPRIV IV infusion at 60 units per kilogram (U/kg) body weight once every other week (EOW) for 60 (+10) minutes for up to 51 weeks.
velaglucerase alfaEXPERIMENTAL15 to 60 U/kg, EOW via intravenous infusion
InvestigationalEXPERIMENTALvelaglucerase alfa
GA-GCBEXPERIMENTALVPRIV™ ,velaglucerase alfa
imigluceraseACTIVE_COMPARATOR -
GA-GCB (velaglucerase alfa)EXPERIMENTAL15-60 U/kg, every other week via intravenous infusion

Interventions

NameTypeDescription
Velaglucerase AlfaDRUGVPRIV intravenous infusion every other week for 60 minutes.
imigluceraseBIOLOGICALIV infusion, 60 U/kg every other week for 9 months
GA-GCB (velaglucerase alfa)BIOLOGICAL15-60 U/kg, every other week via intravenous infusion
GA-GCBDRUG15-60 U/kg every other week via intravenous infusion
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Eligibility Criteria

Age Range2 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites10

Inclusion: * Has a documented, confirmed diagnosis of type 1 Gaucher disease based on the following, as determined by the investigator: 1. Decreased glucocerebrosidase (GCB) activity level that is ≤30% of normal or 2. Decreased GCB activity level that is \>30% of normal, but with confirmation ...

Countries:ChinaJapanUnited StatesArgentinaIndiaIsraelParaguayRussiaSpainTunisiaUnited KingdomPolandEgyptRomaniaSerbia
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Frequently asked questions about GA-GCB

What is GA-GCB used for?

GA-GCB is being developed for the treatment of Gaucher disease, a rare inherited disorder. It is an enzyme replacement therapy studied in patients with Type 1 Gaucher disease, including patients who had previously been treated with imiglucerase. Development is at Phase 2.

Who is developing GA-GCB?

GA-GCB is being developed by Takeda Pharmaceutical Company Limited, which trades under the ticker TAK. Takeda is the sponsor behind the clinical program evaluating GA-GCB as an enzyme replacement therapy for Type 1 Gaucher disease.

What phase is GA-GCB in?

GA-GCB is in Phase 2 development. It is an investigational enzyme replacement therapy and has not been approved. Two clinical trials of GA-GCB have been completed, and no trials are currently active.

What clinical trials is GA-GCB in?

Two completed trials have evaluated GA-GCB. NCT00478647 was a Phase 2 study in Type 1 Gaucher disease patients previously treated with imiglucerase, enrolling 40 patients across the United States, Israel, Poland, Spain, and the United Kingdom. NCT00391625 was a Phase 1 open-label extension study of long-term safety, enrolling 10 patients in Israel, Romania, and Serbia.

Is GA-GCB the same as velaglucerase alfa?

Yes. GA-GCB is also known as velaglucerase alfa. Both names refer to the same enzyme replacement therapy candidate being developed by Takeda for Type 1 Gaucher disease, so readers searching either name are looking at the same asset.

How many patients have been enrolled in GA-GCB trials?

Across the two completed GA-GCB trials, 50 patients have been enrolled in total. NCT00478647 enrolled 40 patients with Type 1 Gaucher disease, and NCT00391625 enrolled 10 patients in an open-label extension study evaluating long-term safety.