Fig. 5.
Pertussis toxin inhibits IL-8 secretion by eosinophils.
Cells were stimulated with TNF-α (10 ng/mL), HrHRF (0.7 μmol/L), or both in the absence (open bars) or presence of 1 ng/mL of either PT (closed bars) or its inactive β-oligomer (stippled bars). Data are the mean values from 2 experiments.