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Efficient gene transfer into nondividing cells by adeno-associated virus-based vectors
G Podsakoff1, K K Wong, S Chatterjee
1Division of Pediatrics, City of Hope National Medical Center, Duarte, California 91010.
Journal of Virology
|September 1, 1994
Summary
Adeno-associated virus (AAV) vectors efficiently transfer genes into nonproliferating cells, including quiescent populations. This gene transfer capability supports potential applications in human gene therapy for stem cells.
Area of Science:
- Molecular Biology
- Gene Therapy
- Virology
Background:
- Adeno-associated virus (AAV) vectors are promising for gene therapy due to their broad host range, high transduction efficiency, and low toxicity.
- Understanding AAV vector biology in nonproliferating cells is crucial for expanding gene therapy applications.
Purpose of the Study:
- To evaluate the efficiency of AAV-mediated gene transfer into nonproliferating cell populations.
- To investigate the mechanisms of AAV vector entry and gene expression in quiescent cells.
Main Methods:
- Cells were induced into a nonproliferative state using DNA synthesis inhibitors (fluorodeoxyuridine, aphidicolin) or contact inhibition (confluence, serum starvation).
- Cells in logarithmic growth or DNA synthesis arrest were transduced with an AAV vector (vCWR:beta gal) encoding beta-galactosidase.
- Southern hybridization was used to analyze vector DNA integration into chromosomal DNA.
Main Results:
- AAV vector gene expression in non-dividing cells was equivalent to that in actively proliferating cells.
- Evidence suggests functional AAV vector entry, nuclear transport, and uncoating occur in quiescent cells.
- Vector DNA integration into cellular chromosomal DNA was confirmed in cells transduced during DNA synthesis arrest.
Conclusions:
- AAV vectors can efficiently mediate gene transfer into nonproliferating cells.
- These findings support the use of AAV vectors for gene therapy in quiescent cell populations, such as hematopoietic stem cells.