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Published in: Virology Journal 1/2013

Open Access 01-12-2013 | Methodology

A quantitative infection assay for human type I, II, and III interferon antiviral activities

Authors: Emily Voigt, Bahar İnankur, Ashley Baltes, John Yin

Published in: Virology Journal | Issue 1/2013

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Abstract

Background

Upon virus infection, cells secrete a diverse group of antiviral molecules that signal proximal cells to enter into an antiviral state, slowing or preventing viral spread. These paracrine signaling molecules can work synergistically, so measurement of any one antiviral molecule does not reflect the total antiviral activity of the system.

Results

We have developed an antiviral assay based on replication inhibition of an engineered fluorescent vesicular stomatitis virus reporter strain on A549 human lung epithelial cells. Our assay provides a quantitative functional readout of human type I, II, and III interferon activities, and it provides better sensitivity, intra-, and inter-assay reproducibility than the traditional crystal violet based assay. Further, it eliminates cell fixation, rinsing, and staining steps, and is inexpensive to implement.

Conclusions

A dsRed2-strain of vesicular stomatitis virus that is sensitive to type I, II, and III interferons was used to develop a convenient and sensitive assay for interferon antiviral activity. We demonstrate use of the assay to quantify the kinetics of paracrine antiviral signaling from human prostate cancer (PC3) cells in response to viral infection. The assay is applicable to high-throughput screening for anti-viral compounds as well as basic studies of cellular antiviral signaling.
Appendix
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Metadata
Title
A quantitative infection assay for human type I, II, and III interferon antiviral activities
Authors
Emily Voigt
Bahar İnankur
Ashley Baltes
John Yin
Publication date
01-12-2013
Publisher
BioMed Central
Published in
Virology Journal / Issue 1/2013
Electronic ISSN: 1743-422X
DOI
https://doi.org/10.1186/1743-422X-10-224

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