TRPA1 is a calcium-permeable, nonselective cation channel expressed in the dorsal root ganglion and trigeminal ganglia nociceptive neurons. It is activated by the pungent compounds in mustard oil (AITC, allyl isothiocyanate), cinnamon (cinnamaldehyde), garlic (allicin), and is believed to mediate
The transient receptor potential (TRP) channels family are cationic channels involved in various physiological processes as pain, inflammation, metabolism, swallowing function, gut motility, thermoregulation or adipogenesis. In the oral cavity, TRP channels are involved in chemesthesis, the sensory