CHEMBL5731607

Potentiator Assay: Fischer Rat Thyroid (FRT) epithelial cells, stably expressing human ΔF508-CFTR were used as monolayer cultures on permeable supports. Cl− current was measured using the short circuit current technique, under an imposed basolateral to apical Cl− gradient in Ussing chambers. To measure stable Cl− currents, FRT cells were cultured for 48 h at 27° C. to facilitate the insertion of ΔF508 CFTR into the plasma membrane. Ussing chamber studies were likewise conducted at 27° C. Under these conditions, the effects of cumulative additions of test compounds on ΔF508 CFTR currents could be quantitated with both potency and efficacy endpoints. Compounds were added to both the apical and basloalteral sides subsequent to addition of 10 μM forskolin. Efficacy of compounds was compared to a known potentiator such as gensitein.