email article A novel gene therapy for severe combined immunodeficiency from adenosine deaminase deficiency (ADA-SCID) restored immune cell counts without death or need for enzyme replacement therapy, researchers reported. Survival without needing to re-initiate pegylated ADA enzyme replacement therapy, or have a rescue allogeneic hematopoietic stem cell transplantation (AHCT), was 95% to 97% at last follow-up at 24 or 36 months across three studies pooled together by Donald B. Kohn, MD, of the University of California Los Angeles, and colleagues. Those rates compare favorably with the ...