Towards gene therapy for the central nervous system.

Gene therapy has generated enormous scientific, medical and public interest over the last decade. Clinical trials involving approximately 2000 patients worldwide have targeted simple genetic diseases such as cystic fibrosis, muscular dystrophy, adenosine deaminase deficiency, Gaucher's disease and familial hypercholesterolemia, as well as complex acquired diseases such as cancer and AIDS. The central nervous system is a new and particularly exciting target for gene therapy because its unique properties prevent the successful treatment of many neurological disorders by conventional means. This review discusses the potential applications of in vivo gene therapy to neurological disorders that have the greatest potential for genetic treatments.