Figure 1From: House dust mite major allergens Der p 1 and Der p 5 activate human airway-derived epithelial cells by protease-dependent and protease-independent mechanismsDose-response of crude house-dust-mite (HDM) extract, natural purified Der p1 and recombinant (r)Der p5 of absolute levels of interleukin (IL)-6 (left panel) and IL-8 (right panel) protein. A549 cells were incubated during 24 hours in the absence and presence of increasing concentrations (indicated in μg/ml) of HDM extract, Der p1 and recombinant (r)Der p5. IL-6 protein levels are expressed as pg/ml; IL-8 protein levels are expressed as ng/ml.Back to article page