Fig. 6.

Expression of p65 protein following PRRSV infection in MARC-145 cells. MARC-145 cells cultures were infected with PRRSV at MOI = 1. Cytoplasmic extracts were prepared at indicated time points and subjected to Western blot analysis with antibodies specific for p65, a key protein for NF-κB activation. β-actin was included as a control for sample loading. a The p65 protein expression was examined by Western blot. b The band intensity was detected and the fold changes of NF-κB were calculated compared with control group. *P < 0.05