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Alpha-Galactosidase A Replacement Therapy for Fabry Disease

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00048906
Recruitment Status : Completed
First Posted : November 11, 2002
Last Update Posted : March 4, 2008
Information provided by:
National Institutes of Health Clinical Center (CC)

Brief Summary:

This study will determine the safety of the drug Replagal or treating patients with Fabry disease, an inherited metabolic disorder. In this disease, an enzyme called Alpha-galactosidase A, which normally breaks down a fatty substance called globotriaosylceramide (Gb3), is missing or does not function properly. The resulting accumulation of Gb3 causes problems with the kidneys, heart, nerves, and blood vessels. Replagal is a genetically engineered form of Alpha-galactosidase A. Previous studies have shown that patients with Fabry disease who had not progressed to end-stage kidney failure tolerated Replagal replacement therapy well. This study will examine the effects of the drug in patients with kidney problems associated with Fabry disease.

Patients with Fabry disease who are on kidney dialysis, or have had a kidney transplant, may be eligible for this study.

During this 6 to 12-month study, participants will receive a 40-minute intravenous (IV) infusion of Replagal every other week, with close monitoring during and after the infusions. Before the first infusion, patients will be evaluated with a medical history, physical and neurological examinations, electrocardiogram (ECG), routine blood and urine tests, kidney test, and measurements of height, weight, and vital signs (blood pressure, pulse, breathing rate, temperature). In addition, they will have pharmacokinetic studies immediately before and following the first infusion of Replagal. For these studies, blood samples of less than a teaspoon each will be drawn to measure the level of Replagal enzyme activity. The samples will be collected at the following time points: immediately before the infusion; 20 minutes into the infusion; at the end of the infusion; after the infusion at 50, 60, and 90 minutes, and 2, 3, 4, and 8 hours.

Safety evaluations will be done once a week for the first month and then once a month for the rest of the study period. These evaluations include a physical examination, measurement of vital signs, electrocardiogram, routine blood and urine tests, and kidney testing.

Condition or disease Intervention/treatment Phase
Fabry Disease Drug: DRX005B Phase 2

Detailed Description:
The objectives of this clinical trial are to study the effects of a range of renal function on the safety and pharmacokinetics of Replagal enzyme replacement therapy in patients with Fabry Disease. Patients with clinical and genetic or biochemical evidence of Fabry Disease will be selected for this clinical trial. Sixty (60) patients will be enrolled in this clinical trial. Enrollment will be stratified based on baseline renal function as per FDA guidelines. This is an open label clinical study. Baseline evaluations will be conducted over an approximately 3 day period. Patients will receive intravenous (IV) infusions of Replagal at a dose of 0.2 mg/kg/dose every 2 weeks. Pharmacokinetic studies will be performed with the first administered dose. The safety evaluations for patients in this study will include vital signs, physical examinations, adverse event (AE) assessments, electrocardiograms (ECG), and a battery of laboratory tests including measurement of anti-Replagal antibodies. An overview of the study appears in Appendix A.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 3 participants
Primary Purpose: Treatment
Official Title: A Safety and Pharmacokinetic Study of Replagal Enzyme Replacement Therapy in Patients With Fabry Disease
Study Start Date : November 2002
Study Completion Date : November 2003

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Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

INCLUSION CRITERIA - Patient has Fabry Disease:

Patient is a male hemizygote, age 18 or above, with evidence of Fabry Disease, defined as Alpha-galactosidase A enzyme deficiency. Alpha-galactosidase A deficiency is defined as a plasma or serum enzyme level less than 1.2 nmoles/hr/mL.


Patient is a heterozygous carrier female, aged 18 or above, with evidence of Fabry Disease defined as a mutation in the Alpha-galactosidase A gene.

Patient has clinical evidence of Fabry Disease. For patients with compromised renal function or a history of renal transplant as a result of Fabry Disease, the renal disease must be consistent with Fabry Disease. For other patients, clinical evidence is defined as at least one (1) of the following:

neurologic disease (neuropathic pain)

cardiac disease (cadiomyopathy)

cerebrovascular disease (history of stroke)

dermatologic disease (angiokeratomas)

gastrointestinal disease (malabsorption and weight loss).


Patient is not eligible for an ongoing TKT sponsored placebo-controlled clinical trial that is accruing patients. The selection criteria for ongoing Study TKT010 appear in Appendix D. If another TKT sponsored placebo-controlled clinical trial is initiated during this study, the selection criteria for that study will be appended to this study.

Patient has a disease other than Fabry that is the cause of the patient's renal dysfunction (for example, diabetes or hypertension).

Patient has received another investigational therapeutic agent for Fabry Disease.

Patient has received a renal transplant as a result of renal dysfunction caused by a disease other than Fabry Disease.

Patient is unable to comply with the protocol, eg, is uncooperative with protocol schedule, refuses to agree to all of the study procedures, is unable to return for safety evaluations, or is otherwise unlikely to complete the study as determined by the investigator or the medical monitor.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00048906

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United States, Maryland
National Institute of Neurological Disorders and Stroke (NINDS)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institute of Neurological Disorders and Stroke (NINDS)
Layout table for additonal information Identifier: NCT00048906    
Other Study ID Numbers: 030043
First Posted: November 11, 2002    Key Record Dates
Last Update Posted: March 4, 2008
Last Verified: November 2003
Keywords provided by National Institutes of Health Clinical Center (CC):
Fabry Disease
Additional relevant MeSH terms:
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Fabry Disease
Lysosomal Storage Diseases, Nervous System
Brain Diseases, Metabolic, Inborn
Brain Diseases, Metabolic
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Cerebral Small Vessel Diseases
Cerebrovascular Disorders
Vascular Diseases
Cardiovascular Diseases
Genetic Diseases, X-Linked
Genetic Diseases, Inborn
Metabolism, Inborn Errors
Lipid Metabolism, Inborn Errors
Lysosomal Storage Diseases
Metabolic Diseases
Lipid Metabolism Disorders