IL18 and cystic fibrosis: We observed CF-specific increases in IL-18, IL-1β, caspase-1 activity, in addition to ASC-speck release, that were all reversed by pre-treatment with epithelial sodium channel (ENaC) and NLRP3-inflammasome inhibitors (Peckham et al., 2017; Scambler et al., 2019).