SLC26A4 is increased in nasal epithelial cells during common colds. a, Boxplots representing SLC26A4 expression during common colds (1-3 d and 5-7 d after onset) and at baseline (∼42 days after onset). Normalized gene copy number was determined by quantitative RT-PCR. Data are from n = 22 subjects, including 15 subjects with asthma. ** p < 0.01 vs. Visit 3. b, Effects of RV16 and IFN-γ on SLC26A4 expression in NHBE cells. Cells were infected with RV16 and/or stimulated with 10 ng/ml IFN-γ for 24 h as indicated. Results are means and error bars represent s.e.m., n = 3 wells per condition.* p < 0.05 vs. Control, † p < 0.05 vs. RV16 alone.