STING antiviral response is mediated by IRF3.

<p>EPC cells were co-transfected with 2 µg of pcDNA-IRF3-Cter encoding a dominant-negative mutant of IRF3, and 2 µg of pcDNA-STING, pcDNA-MAVS or an empty vector. At 48 h posttransfection, EPC cells were infected with a recombinant rVHSV-Tom expressing the tdTomato fluorescent protein at an MOI of 1 and incubated at 15°C. The culture supernatants were collected at 0, 24 and 96 h postinfection and the viral titer was determined by plaque assay on EPC cells. Cell monolayers were then stained with crystal violet either at 96 h postinfection. Each time point was represented by three independent experiments, and each virus titration was done in duplicate. Means are shown together with the standard errors. “ns” indicate non-significant difference (p>0.05) as determined by Student’s <i>t</i> test.