1. Academic Validation
  2. Identification of a Novel TRPM8 Agonist from Nutmeg: A Promising Cooling Compound

Identification of a Novel TRPM8 Agonist from Nutmeg: A Promising Cooling Compound

  • ACS Med Chem Lett. 2017 May 31;8(7):715-719. doi: 10.1021/acsmedchemlett.7b00104.
Tomohiro Shirai 1 Kentaro Kumihashi 1 Mitsuyoshi Sakasai 1 Hiroshi Kusuoku 1 Yusuke Shibuya 1 Atsushi Ohuchi 1
Affiliations

Affiliation

  • 1 Kansei Science Research and Biological Science Research, Kao Corporation, 2606 Akabane, Ichikai-Machi, Haga-Gun, Tochigi 321-3497, Japan.
Abstract

The transient receptor potential melastatin 8 (TRPM8) ion channel is the primary receptor for innocuous cold stimuli (<28 °C) in humans. TRPM8 agonists such as l-(-)-menthol are widely used as flavors and additives to impart briskness, in addition to medicinal uses for inflammation and pain. Though various natural and synthetic agonists have been explored, only few natural compounds are known. We report herein the identification and characterization of the novel neolignan agonist erythro- and threo8'-7-ethoxy-4-hydroxy-3,3',5'-trimethoxy-8-O-4'-neolignan (1) with an EC50 of 0.332 μM, which was isolated from a well-known spice, nutmeg (Myristica fragrans Houtt.). Structure activity relationships are also disclosed, showing that the 7-d-menthoxy derivative is the most potent agonist (EC50 = 11 nM). The combination of 1 and l-(-)-menthol has an additive effect, suggesting that neolignan compounds interact with TRPM8 at different sites from those of l-(-)-menthol.

Keywords

Cooling compound; TRPM8; menthol; neolignan; nutmeg.

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