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MND-ADA Transduction of CD34+ Cells From Children With ADA-SCID

NCT00794508 · Status: COMPLETED · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 10

Last updated 2021-04-23

Study results available
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Summary

Severe combined immune deficiency (SCID) may result from inherited deficiency of the enzyme adenosine deaminase (ADA). Children with ADA-deficient SCID often die from infections in infancy, unless treated with either a bone marrow transplant or with ongoing injections of PEG-ADA (Adagen) enzyme replacement therapy. Successful BMT requires the availability of a matched sibling donor for greatest success, and treatment using bone marrow from a less-well matched donor may have a higher rate of complications. PEG-ADA may restore and sustain immunity for many years, but is very expensive and requires injections 1-2 times per week on an ongoing basis. This clinical trial is evaluating the efficacy and safety of an alternative approach, by adding a normal copy of the human ADA gene into stem cells from the bone marrow of patients with ADA-deficient SCID. Eligible patients with ADA-deficient SCID, lacking a matched sibling donor, will be eligible if they meet entry criteria for adequate organ function and absence of active infections and following the informed consent process. Bone marrow will be collected from the back of the pelvis from the patients and processed in the laboratory to isolate the stem cells and add the human ADA gene using a retroviral vector. The patients will receive a moderate dosage of busulfan, a chemotherapy agent that eliminates some of the bone marrow stem cells in the patient, to "make space" for the gene-corrected stem cells to grow once they are given back by IV. Patients will be followed for two years to assess the potentially beneficial effects of the procedure on the function of their immune system and to assess possible side-effects. This gene transfer approach may provide a better and safer alternative for treatment of patients with ADA-deficient SCID.

Conditions

  • Severe Combined Immunodeficiency

Interventions

BIOLOGICAL

ADA gene transfer

Autologous CD34+ cells transduced with the retroviral vector MND-ADA, carrying the human ADA gene.

Sponsors & Collaborators

  • FDA Office of Orphan Products Development

    collaborator FED

  • National Institutes of Health (NIH)

    collaborator NIH

  • Donald B. Kohn, M.D.

    lead OTHER

Principal Investigators

  • Donald B. Kohn, M.D. · University of California, Los Angeles

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
1 Month
Max Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2008-11-30
Primary Completion
2014-12-31
Completion
2015-01-31

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00794508 on ClinicalTrials.gov