Fig. 2From: PD-1/PD-L1 axis induced host immunosuppression via PI3K/Akt/mTOR signalling pathway in piglets infected by Glaesserella ParasuisDetermination of the PD-1/PD-L1 expression at mRNA and protein levels by RT-PCR and western blot respectively. A PD-1 expression at mRNA level; B PD-L1 expression at mRNA level; C, E PD-1 expression at protein level; D, F PD-L1 expression at protein level. ** p < 0.01*; *** p < 0.001Back to article page