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We demonstrate here that the effect of OR51E1 on TRPV1 activation varies depending on the two TRPV1 ligands: capsaicin and eugenol. Notably, both of these ligands are vanilloid analogs. OR51E1 enhanced the response of TRPV1 to capsaicin but diminished that to eugenol. OR51E2 also showed similar effects. Based on the susceptibility to the OR's modulatory effects, various TRPV1 ligands could be classified into capsaicin and eugenol types. Activation of OR51E1 enhanced cAMP production. In addition, forskolin exhibited almost identical effects as ORs on TRPV1 responses to both types of ligands. These results suggest that OR51E1-induced cAMP elevation leads to a modification of TRPV1, presumably phosphorylation of TRPV1, which amplifies the susceptibility of TRPV1 to the two types of ligands differently.<\/jats:p>","DOI":"10.1093\/bbb\/zbae060","type":"journal-article","created":{"date-parts":[[2024,5,12]],"date-time":"2024-05-12T01:23:16Z","timestamp":1715476996000},"page":"908-917","source":"Crossref","is-referenced-by-count":5,"title":["Divergent effects of olfactory receptors on transient receptor potential vanilloid 1 activation by capsaicin and eugenol"],"prefix":"10.1093","volume":"88","author":[{"given":"Sakura","family":"Moriyama","sequence":"first","affiliation":[{"name":"SANKEN, Osaka University , Mihogaoka 8-1, Ibaraki, Osaka ,","place":["Japan"]},{"name":"Graduate School of Frontier Biosciences, Osaka University , Yamadaoka 1-3, Suita, Osaka 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