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        Viral Infection for G Protein-Coupled Receptor Expression in Eukaryotic Cells

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        This chapter describes the protocol for the preparation of recombinant adenoviruses and infection of target cells to transiently express G protein-coupled receptors (GPCRs) or other proteins of interest. Adenoviruses are non-enveloped viruses containing a linear double-stranded DNA genome. Their life cycle does not normally involve integration into the host genome, rather they replicate as episomal elements in the nucleus of the host cell, and consequently there is no risk of insertional mutagenesis. Up to 30 kb out of the 35 kb of the wild-type adenovirus genome can be replaced by foreign DNA. Adenoviral vectors are very efficient in transducing target cells in vitro and in vivo and can be produced at high titers (>1011 /ml). The viral infection has a number of useful features: (1) the efficiency of gene transduction is very high (up to 100 % in sensitive cells); (2) the infection is easy and does not physically alter the cell membrane for gene transduction; (3) it is possible to infect cells that are resistant to transfection with plasmids (including nondividing cells); and (4) the viral vectors can be used for infection in vivo (including gene therapy) and can potentially be targeted to specific cells or tissues.
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