A gene therapy cure for ADA-SCID?

A recent article published on the New England Journal of medicine by Aiuti and colleagues reports on the progress of 10 patients that have been treated for ADA-SCID by gene therapy. This is a form of severe combined immuno-deficiency (SCID) where there is a lack of the enzyme adenosine deaminase (ADA), coded for by a gene on chromosome 20.