Table 3.

Summary of the clinical experience of hematopoietic stem cell (HSC)-gene therapy for SCID-X1.

StudyNo. pts treatedLongest follow-upEfficacyToxicity
GOSH indicates Great Ormond Street Hospital. 
Hôpital Necker22,25  10 10 y Yes T-cell leukemia (4 pts) 
GOSH 23,24  10 7 y Yes T-cell leukemia (1 pt) 
GOSH, Necker,27 NIH26  5 (age 10–20) 3 y for pts with engraftment No, improvement in 1 pt No 
StudyNo. pts treatedLongest follow-upEfficacyToxicity
GOSH indicates Great Ormond Street Hospital. 
Hôpital Necker22,25  10 10 y Yes T-cell leukemia (4 pts) 
GOSH 23,24  10 7 y Yes T-cell leukemia (1 pt) 
GOSH, Necker,27 NIH26  5 (age 10–20) 3 y for pts with engraftment No, improvement in 1 pt No