Fig. 2.
Capsaicin did not inhibit Ih in the capsaicin-insensitive DRG neurons. (A) Representative current responses of DRG neurons to 1-s voltage pulses injected in 10-mV increment under control condition, during application of 1 µM capsaicin (CAP). (B) Current-voltage relationship of Ih. Amplitudes of Ih in the presence CAP were compared with those of control Ih at the same test voltage. (C) Effects of capsaicin on the voltage dependence of activation. Normalized tail current was plotted versus various potentials (-60 to -130 mV) and fitted with Boltzmann equation. Estimated V1/2 was not significantly changed by CAP.