Fig. 1
Effects of menthol and capsaicin on human transient receptor potential vanilloid 1 (hTRPV1) or human transient receptor potential melastatin (hTRPM8). a Changes in the Fura-2 ratio in response to capsaicin (0.1 µM) application in the presence and absence of menthol (10 mM) in human embryonic kidney (HEK) 293T cells expressing hTRPV1 (n = 40). b Changes in Fura-2 ratio in response to menthol (1 mM) application in the presence and absence of capsaicin (1 mM) in HEK293T cells expressing hTRPM8 (n = 94). Data are shown as the mean ± standard deviation (SD)