Figure 2

Expression of hCLCA1 in mucus-producing epithelial cells before and after challenge with either saline or ragweed. There is a significant increase in hCLCA1 expression after ragweed challenge but not after saline compared with baseline. Value pairs for each patient before and after challenge are shown by connected dots. Mean values are indicated by lines. *p < .01. Epithelial hCLCA1 expression is scored from 0 (no cells) to 8 (all cells).