mRNA expression for 5-HT
receptors and choline acetyltransferase (ChAT). The trachea cultured in the absence (control) and presence of IL-1β (10 ng/ml). A 2-day culture period was used for experiments with intact epithelium and 4 days period for denuded segments. Each data point is derived from 2–5 experiments. Each value was derived from 3 mice and presented as mean ± S.E.M. Unpaired student's t-test with Welch's correction were used for statistic analysis. N.S. = not significant. Epi+ = with epithelium, Epi- = without epithelium.