Abstract
Mini-adenoviruses (mAd) deleted of all viral coding regions represent an emerging approach for transgene expression. We have exploited the unique features of the adeno-associated virus (AAV) terminal repeats within the context of an adenovirus-adeno-associated hybrid virus (Ad/AAV) as a strategy for rapid and efficient generation of mAd. Excision and generation of mAd from the parental Ad/AAV hybrid vector was achieved in 293 cells through recombination but without selection for mAd production. Analysis of mAd isolated from 293 cells indicated that mAd DNA exists as monomer and dimer forms within the recombinant viral capsid. Formation of recombinant mAd was significantly increased using an AAV Rep78- or Rep68-expressing cell line through Rep-mediated excision utilizing the AAV terminal repeat sequences present in the Ad/AAV hybrid virus genome. The mAd viruses were infectious and able to transfer functional gene to A549 and HeLa cells. This approach is rapid and efficient, thereby providing a simplified methodology for generating mAd with functional transducing capabilities.
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