Article
作者: Yu, Stephanie ; Singh, Malvenderjit Jagjit ; Duncan, Miles C ; English, Elizabeth J ; Holmes, Michael C ; Doherty, Ann ; Cunningham, Sharon C ; van Dijk, Eva B ; Sun, Gang ; Ibraheim, Raed ; Purcell, Cormac ; Bhavsar, Yashvi ; Rottman, James B ; Cotta-Ramusino, Cecilia ; Benczkowski, Matthew S ; Kibbler, Emily S ; Mekonnen, Befikadu D ; Li, Guangde ; Wang, Z Jane ; An, Ding ; Altshuler, Robert C ; Zakas, Philip M ; Lang, Brendan ; Fu, Yanfang ; Salomon, William E ; Wang, Zi Jun ; Alberry, Ryan ; Rubens, Jacob R ; Querbes, William ; Tonga, Gulen Y ; Citorik, Robert J ; Roquet, Nathaniel ; Alexander, Ian E ; Jain, Rachit
Recombinant adeno-associated virus (rAAV) vector gene delivery systems have demonstrated great promise in clinical trials but continue to face durability and dose-related challenges. Unlike rAAV gene therapy, integrating gene addition approaches can provide curative expression in mitotically active cells and pediatric populations. We explored a novel in vivo delivery approach based on an engineered transposase, Sleeping Beauty (SB100X), delivered as an mRNA within a lipid nanoparticle (LNP), in combination with an rAAV-delivered transposable transgene. This combinatorial approach achieved correction of ornithine transcarbamylase deficiency in the neonatal Spfash mouse model following a single delivery to dividing hepatocytes in the newborn liver. Correction remained stable into adulthood, while a conventional rAAV approach resulted in a return to the disease state. In non-human primates, integration by transposition, mediated by this technology, improved gene expression 10-fold over conventional rAAV-mediated gene transfer while requiring 5-fold less vector. Additionally, integration site analysis confirmed a random profile while specifically targeting TA dinucleotides across the genome. Together, these findings demonstrate that transposable elements can improve rAAV-delivered therapies by lowering the vector dose requirement and associated toxicity while expanding target cell types.