FIG 4.
Induction of CCL20 production by various environmental antigens. 16HBE14o- cells were exposed to HDM, ambient urban Baltimore particulate matter (AUB), LPS, OVA, ragweed, cockroach antigen (Ag), Der p 1, or chitin, and subsequent CCL20 secretion was measured by means of ELISA. *P < .001. ctrl, Control.