alexa Generation of a replication-deficient recombinant human adenovirus type 35 vector using bacteria-mediated homologous recombination.
Oncology

Oncology

Journal of Cancer Science & Therapy

Author(s): Wu C, Lei X, Wang J, Hung T

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Abstract The use of adenovirus type 35 (Ad35) as a vector in vaccine and gene therapy studies is promising due to its broad cell tropism and low seroprevalence in humans. However, to date, a simple and effective system for producing recombinant Ad35 (rAd35) has not been well developed. This report describes a two-plasmid Ad35-Easy system to facilitate the production of recombinant Ad35 (rAd35). The system employed the pAd35-shuttle vector for foreign gene transfer and the pAd35-backbone vector to provide the Ad35 genomic backbone. A 293-Ad35E1B cell line was used to trans-complement rAd35 replication. rAd35 plasmids were obtained through homologous recombination following co-transformation of E. coli BJ5183 cells with recombinant pAd35-shuttle vectors harboring foreign genes. rAd35 viruses were obtained directly by transfecting 293-Ad35E1B cells with foreign gene-containing rAd35 plasmids and the pAd35-backbone vector. The production of E1 deficient rAd35 was evaluated by transfecting the 293-Ad35E1B cells with the rAd35 plasmid containing the enhanced green fluorescent protein (EGFP) gene. The virus grew effectively at a yield comparable to that of wild type Ad35 in HEp2 cells, indicating that the Ad35-Easy system is an efficient method for rapid production of rAd35 in sufficient quantities for vaccine development or gene therapy. Copyright © 2011 Elsevier B.V. All rights reserved. This article was published in J Virol Methods and referenced in Journal of Cancer Science & Therapy

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