High dose systemic gene therapy: emerging trends on safety and efficacy

Cell & Gene Therapy Insights 2020; 6(4), 569–575


Published: 6 May 2020
Expert Insight
Hansell Stedman, Roland Herzog, Guangping Gao, George Church, Ying Kai Chan

Systemic delivery of adeno-associated viral (AAV) vectors has traditionally been used in the clinic for liver-directed programs such as hemophilia A and hemophilia B. With the approval of Zolgensma® for the treatment of spinal muscular atrophy type I (SMA1), high dose systemic gene therapy has become a promising approach for systemic and neuromuscular transduction for various indications. Here, we discuss emerging findings on safety and efficacy from recent clinical trials utilizing high dose systemic gene therapy. In particular, we highlight previously unappreciated observations related to safety, and discuss possible causes and future directions.