The AAV capsid can influence the epigenetic marking of rAAV delivered episomal genomes in a species dependent manner.

ABSTRACT: Recombinant adeno-associated viral vectors (rAAVs) are among the most commonly used vehicles for in vivo based gene therapies. However, it is hard to predict which AAV capsid will provide the most robust expression in human subjects due to the observed discordance in vector-mediated transduction between species. In our study, we use a primate specific capsid, AAV-LK03, to demonstrate that the limitation of this capsid towards transduction of mouse cells is unrelated to cell entry and nuclear transport but rather due to depleted histone H3 chemical modifications related to active transcription, namely H3K4me3 and H3K27ac, on the vector DNA itself. A single-amino acid insertion into the AAV-LK03 capsid enables efficient transduction and the accumulation of active-related epigenetic marks on

SUBMITTER: Gonzalez-Sandoval A 

PROVIDER: S-EPMC10147666 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature