Figure 4.
(A) HBMEC monolayers were treated with signaling pathway inhibitors TCPK, SB202190 and U0126 for 30 min prior to infection with SPN. Protein expression of IL-8 in hBMEC supernatants, 6 h post infection was determined using ELISA. Quantification of bacterial invasion following hBMEC treatment with U0126 (30 min) compared to DMSO control (B), TNFα and NanA-GST (C) or NanA-GST and NanAΔEnz-GST (D). Experiments were performed three times in triplicate. Bars represent mean and standard deviation of one representative experiment. ** p<0.005, *** p<0.001.