Single Plasmid-Based, Upgradable, and Backward-Compatible Adenoviral Vector Systems

Human Gene Therapy
Hongyan LiuTao Hung

Abstract

Existing adenoviral vector systems have two drawbacks. It is labor-intensive and time-consuming to load a transgene in these systems, and transgene-harboring vectors are dead ends: they cannot be reused to construct a vector carrying another transgene or achieving new characteristics. To conquer these shortcomings, single plasmid-based adenoviral vector systems were constructed where a unique PmeI site was located at the position for insertion of the exogenous gene. The polymerase chain reaction (PCR) amplified transgene could be cloned into PmeI-linearized starting plasmids using one step of Gibson assembly to generate target adenoviral plasmids, which were then ready for virus rescue. This procedure was termed restriction assembly. To expand the application of these systems, two ClaI sites were created upstream and downstream of the fiber gene to generate an upgraded starting plasmid pKAd5f11pABR-EPG. The modified fiber gene, amplified by overlap extension PCR, could be used to substitute the original fiber in pKAd5f11pABR-EPG to generate an adenoviral plasmid with a new fiber by restriction assembly. On the other hand, pKAd5f11pABR-EPG was also a starting adenoviral plasmid for expressing other transgenes. In conclusion, eas...Continue Reading

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Citations

May 30, 2021·The Journal of Gene Medicine·Wenfeng ZhangZhuozhuang Lu

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Methods Mentioned

BETA
transfection
PCR
electrophoresis
restriction
restriction ligation

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