Early infection and spread of a conditionally replicating adenovirus under conditions of plaque formation

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Abstract

Conditionally-replicating adenoviruses (CRAds) and other oncolytic viruses replicate selectively in tumor cells, presenting a potential cancer treatment approach. To optimize application of these viruses, understanding of early spread of these viruses in target cells is important. Here we used a recombinant adenovirus expressing enhanced jellyfish green fluorescent protein (EGFP) in place of the EIA and EIB genes (AdEGFPuci). Infection of susceptible cells (AD-293) under plaque formation conditions (MOI < < 1) on gridded culture dishes and daily monitoring allowed visualization of initially infected cells, as well as spread to neighboring cells. We determined key parameters of early infection, including the rate and efficiency of spread from the initially infected cell to other cells. It was noteworthy that a minority of initially infected cells ultimately resulted in plaques. The approaches elucidated here will be useful for determining early infection parameters for CRAds of therapeutic interest. © 2011 Elsevier Inc.

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Hofacre, A., Wodarz, D., Komarova, N. L., & Fan, H. (2012). Early infection and spread of a conditionally replicating adenovirus under conditions of plaque formation. Virology, 423(1), 89–96. https://doi.org/10.1016/j.virol.2011.11.014

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