Figure 3.
Distribution of TRPA1 and TRPM8 channels in cold-, menthol-and AITC-sensitive adult mouse DRG neurons. The experimental protocol is similar to the protocol outlined in the Figure 1 legend, with a few exceptions described below. Me is an abbreviation for 400 μM Menthol. (A) The TRPA1 antagonist HC-030031 (30 μM) selectively and completely blocked responses to cold, menthol, and AITC in 96.9% ± 0.7% of AITC-sensitive neurons (n=422). The black horizontal bars indicate when HC-030031 was present in the bath solution. (B) The TRPM8 antagonist M8-B (1 μM) selectively and completely blocked responses to cold and menthol in 95.0% ± 2.9% of menthol-sensitive and AITC-insensitive neurons (n=40). The open horizontal bars indicate when M8-B was present in the bath solution.