TRPV4 is necessary for trigeminal irritant pain and functions as a cellular formalin receptor.

Chen Yong, Kanju Patrick, Fang Quan, Lee Suk Hee, Parekh Puja K, Lee Whasil, Moore Carlene, Brenner Daniel, Gereau Robert W, Wang Fan, Liedtke Wolfgang. Pain, vol. 155 pp. 2662-2672, Dec 2014.