FIGURE 7.

Rescue of misfolded recoded cystic fibrosis transmembrane conductance regulator (CFTR) channels. a) Representative Western blot obtained from HEK293 cells expressing the indicated mutation under basal conditions or after VX809 treatment (3 μM, 24 h). CFTR bands C and B are indicated. b) CFTR maturation of the indicated construct as measured using the C/(B+C) ratio under control conditions and after incubation with the corrector VX809. c) Transport rates measured under basal conditions and in presence of the corrector/potentiator combination (VX809/VX770). ^#: significant effect of treatment (p<0.01, unpaired t-test). d–f) Short-circuit current measurements of primary nasal epithelial cells (p.Gly542*/p.Gly542*) treated with d) dimethyl sulfoxide (DMSO) vehicle, e) gentamicin at a concentration of 1 mg·mL⁻¹ for 2 days, or f) gentamicin (1 mg·mL⁻¹) with VX809 (3 μM). IBMx: 3-isobutyl-1-methylxanthine; CFTR_Inh172: CFTR inhibitor.