JEV-induced IRF8 expression in human microglial cells. (A) CHME3 cells were mock-infected or infected with JEV and total RNA was extracted from cells harvested at different time points. Relative levels of IRF8 and IRF3 transcripts in JEV-infected cells compared to those in mock-infected cells are presented in the left panel. GAPDH expression was used to normalize the data. The right panel shows IRF8 protein levels during JEV infection. (B) CHME3 cells were transfected with CM, M-155 and I-155 followed by JEV infection. The left panel shows the relative abundance of IRF8 measured by qPCR in JEV infected cells in comparison to that in mock-infected cells. GAPDH expression was used to normalize the data. The right panel shows the western blot of IRF8. CM, control mimic; GAPDH, Glyceraldehyde 3-phosphate dehydrogenase; h, hours; I-146a, inhibitor 146a; I-155, inhibitor 155; IRF, interferon regulatory factor; JEV, Japanese encephalitis virus; M-146a, mimic 146a; M-155, mimic 155; pi, post-infection. *, P <0.05.