Human Gene Therapy for Rare Diseases: Rare diseases are those that affect fewer than 200,000 people in the United States. The National Institutes of Health reports that nearly 7,000 rare diseases affect more than 25 million Americans. About 80 percent of rare diseases are caused by a single-gene defect, and about half of all rare diseases affect children. Since most rare diseases have no approved therapies, there is a significant unmet need. The Human Gene Therapy for Rare Diseases guidance, once finalized, will provide recommendations on preclinical, manufacturing and clinical trial design for all phases of the clinical development program for these types of gene therapies. The information is intended to assist sponsors in the design of clinical development programs, where there may be limited study population size, potential feasibility and safety issues, as well as issues relating to the interpretation of effectiveness.
Guidances on Manufacturing Gene Therapies
The FDA is also providing new and comprehensive updates to three existing guidances that address manufacturing issues related to gene therapy. These updates reflect input from many stakeholders. We encourage additional feedback on these documents during the comment period.