Adeno-Associated Viral Vector (AAV)-Mediated In Vivo CRISPR-Cas9 Delivery

CRISPR-based gene editing is a growing therapeutic strategy for modifying or silencing disease-causing genes. This chapter focuses on the in vivo delivery of CRISPR systems using recombinant adeno-associated viral (rAAV) vectors. Specifically, we detail a methodology using a rAAV vector carrying Staphylococcus aureus Cas9 (SaCas9) to target the murine Hao1 gene in liver parenchymal cells as a curative treatment for primary hyperoxaluria type 1 (PH1). We provide comprehensive protocols for plasmid design and cloning, rAAV production, animal administration, and evaluation of editing efficacy.