Fig. 2EThe concentration-response relationships for mecheliolide, costunolide and dehydrocostus lactone on recombinant TMEM16A-mediated CaCC currents in CHO cells.(A) The time course of the effects of mecheliolide (1, 3, 10, 30, 100 μM) on TMEM16A currents tested at +80 mV. (B) Representative TMEM16A-mediated CaCC current traces (recorded using the voltage protocol indicated in
) before and after the effects of different concentrations of mecheliolide were stabilized. (C) The concentration-response relationships of mecheliolide, costunolide and dehydrocostus lactone on TMEM16A-mediated CaCC currents measured at +80 mV. Data were fitted by a logistic function. (D) IC
50 and E
max values of mecheliolide, costunolide and dehydrocostus lactone. n = 5 cells, per group. CaCC, Ca
2+-activated Cl
– channel; CHO, Chinese hamster ovary.