However, preliminary results from measurements of pancreatic function in young children with CF taking the Class 3 CFTR potentiator, Ivacaftor (see Chapter “Cystic Fibrosis: a clinical view”) over 24 weeks, have shown a significant restoration of enzyme-secreting capacity (increased faecal elastase-1 levels), and by inference, pancreatic tissue regeneration, which is an extremely exciting finding [180] that warrants further research. Here, CFTR is linked to cystic fibrosis.