IL1B and cystic fibrosis: Additionally, AP measurements taken from cultured CMs alone (control) or in the presence of an untreated or IL-1β treated CF monolayer (Figure 7B), showed no differences in 10–90 % rise time (control, 4.3 ± 0.4 ms; CF monolayer, 4.5 ± 0.4 ms; IL-1β CF monolayer, 4.3 ± 0.2 ms; Figure 7D) or APD80 (control, 55.4 ± 4.4 ms; CF monolayer, 71.0 ± 7.8 ms; IL-1β CF monolayer 65.0 ± 5.5 ms; Figure 7F).