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Study identifier: NCT01129544 Synced from ClinicalTrials.gov · August 06, 2026
● Study status: Completed

Gene Transfer for Severe Combined Immunodeficiency, X-linked (SCID-X1) Using a Self-inactivating (SIN) Gammaretroviral Vector

Condition: Severe Combined Immunodeficiency  ·  Sponsor: David Williams

PhasePhase 1/Phase 2
Planned participants8
Who can joinMale, N/A to no upper limit
Healthy volunteersNo

About this study

Researchers are working on ways to treat SCID patients who don't have a matched brother or sister. One of the goals is to avoid the problems that happen with stem cell transplant from parents and unrelated people, such as repeat transplants, incomplete cure of the immune system, exposure to chemotherapy, and graft versus host disease. The idea behind gene transfer is to replace the broken gene by putting a piece of genetic material (DNA) that has the normal gene into the child's cells. Gene transfer can only be done if we know which gene is missing or broken in the patient. For SCID-X1, gene transfer has been done in the laboratory and in two previous clinical trials by inserting the normal gene into stem cells from bone marrow. The bone marrow is the "factory" inside the bones that creates blood and immune cells. So fixing the gene in the bone marrow stem cells should fix the immune problem, without giving chemotherapy and without risk of graft versus host disease, because the child's own cells are used, rather than another person's. Out of the 20 subjects enrolled in the two previous trials, 18 are alive with better immune systems after gene transfer. Two of the surviving subjects received gene corrected cells over 10 years ago. Gene transfer is still research for two reasons. One is that not enough children have been studied to tell if the procedure is consistently successful. Of the 20 children enrolled in the previous two trials, one child did not have correction of th…

This description comes directly from the study's public registry record.

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Locations (3)

Mattel Children's Hospital - UCLALos Angeles, California, United States
Children's Hospital BostonBoston, Massachusetts, United States
Cincinnati Children's Medical CenterCincinnati, Ohio, United States

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