A “very basic” type of gene therapy could potentially cure hemophilia, but a major hurdle has been the lack of an effective mode of delivery. Recent strides in using adeno-associated virus (AAV) vectors are changing that, and Glenn Pierce, MD, World Federation of Hemophilia Vice President, Medical, predicts approvals in the next 12-18 months. Dr. Pierce shared his personal experience with hemophilia and discussed his and others’ ongoing research on the use of AAV-mediated gene therapy with host David Henry, MD, in this episode. Hemophilia and AAV gene therapy key points: Hemophilia is caused by a monogenic defect and could, theoretically, be cured by gene replacement or augmentation, says Dr. Pierce, who notes that “it sounds disarmingly simple, but behind that simplicity is a very complex procedure.” The approach uses “gene addition,” which is a basic gene therapy involving the addition of a normal gene to the variant in an individual. This ultimately corrects the clotting f...