Lymphocyte gene therapy.

Genetically corrected T cells are currently under investigation as a treatment for severe combined immunodeficiency disease resulting from a lack of adenosine deaminase (ADA). Monthly injections of these ADA-corrected T cells have resulted in measurable ADA activity in the peripheral blood and the in vivo production of antibody to blood group antigen. Genetically corrected T cells appear to be clinically valuable vehicles for gene therapy.