[Integration of AAV vectors and insertional mutagenesis]

Area of Science:

• Molecular Biology
• Gene Therapy
• Virology

Background:

• Recombinant adeno-associated virus (rAAV) vectors are widely used for in vivo gene transfer in preclinical and clinical settings.
• These vectors enable long-term persistence of genetic material in a transcriptionally active, episomal form within target tissues.

Purpose of the Study:

• To review current knowledge regarding the integration of wild-type and rAAV genomes into host cell DNA.
• To highlight unresolved questions concerning the implications of rAAV genome integration for gene therapy safety.

Main Methods:

• Literature review of studies investigating rAAV genome integration.
• Analysis of data on the fate of rAAV genomes within host cells.

Main Results:

• A significant fraction of rAAV genomes can integrate nonspecifically into the host cell genome.
• This integration raises concerns about potential insertional mutagenesis events.

Conclusions:

• While rAAV vectors are efficient gene transfer tools, their integration into the host genome presents a safety consideration.
• Further research is needed to fully understand and mitigate the risks associated with rAAV genome integration.