This Phase 1/Phase 2 study examines a gene therapy in which a patient's own corrected cells are given by vein, for patients with severe combined immunodeficiency due to ADA enzyme deficiency (ADA-SCID). It included patients with DNA-confirmed ADA-SCID who lack a suitable bone marrow donor and whose immune system does not fully recover on current enzyme replacement therapy. It was carried out in Phase 1/Phase 2 and has been completed.
The summary above is a plain-language rendering of the official record. The original English title is shown for reference.
Criteria are reproduced from the ClinicalTrials.gov record in the original English. Only the trial team can determine eligibility.
Inclusion Criteria: 1. Patients who lack a human leukocyte antigen (HLA)-genotypically identical bone marrow donor OR phenotypically matched family or unrelated donor AND who show incomplete immune reconstitution on Polyethylene glycol-modified adenosine deaminase (PEG-ADA) enzyme replacement therapy (defined by absolute CD4+ count \<300 cell/mm3 and who remain on immunoglobulin replacement therapy) 2. Diagnosis of ADA-SCID (Severe combined immunodeficiency (SCID) due to adenosine deaminase (ADA)confirmed by DNA sequencing OR by confirmed absence of \<3% of ADA enzymatic activity in peripheral blood or (for neonates) in umbilical cord blood erythrocytes and/or leukocytes or in cultured fetal cells derived from either chorionic villus biopsy or amniocentesis, prior to institution of PEG-ADA replacement therapy 3. Parental/guardian/patient signed informed consent