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. 2019 Sep 26;20(19):4779. doi: 10.3390/ijms20194779

Figure 2.

Figure 2

Knockdown of MEK1/2 inhibits JCPyV infection. SVG-A cells were transfected with either a scrambled (Scr) siRNA control or a combination of MEK1 and MEK2 (MEK1/2) siRNA and incubated at 37 °C for 72 h. At 72 h post-transfection, siRNA-transfected cells were either (a) infected with JCPyV (MOI: 1 FFU/cell) at 37 °C for 1 h and then fed with cMEM for 72 h or (b,c) processed for ICW analysis of MEK1/2 knockdown using a MEK1/2-specific antibody (green) and CellTag control (red). (a) Infected cells were fixed and stained to analyze nuclear JCPyV VP1 expression. Data are representative of the mean percentage of JCPyV VP1+ cells per 10x visual field normalized to the siRNA control cells (100%) for triplicate samples (representative of three independent experiments). Error bars = SD. (b) MEK1/2 protein expression was measured for control- and experimental-siRNA treatments by ICW analysis, and (c) signal intensity values were quantified per the calculation [(protein/CellTag) × 100] as determined through ImageJ analysis. Boxes represent the distribution of the data for three independent experiments; box midline represents the median. Whiskers represent values 1.5 times the distance between the first and third quartiles (inter-quartile range). Student’s t-test was used to determine the statistical significance. *, p < 0.05.