The capsaicin receptor participates in artificial sweetener aversion.

Published

Journal Article

Artificial sweeteners such as saccharin, aspartame, acesulfame-K, and cyclamate produce at high concentrations an unpleasant after-taste that is generally attributed to bitter and metallic taste sensations. To identify receptors involved with the complex perception of the above compounds, preference tests were performed in wild-type mice and mice lacking the TRPV1 channel or the T1R3 receptor, the latter being necessary for the perception of sweet taste. The sweeteners, including cyclamate, displayed a biphasic response profile, with the T1R3 mediated component implicated in preference. At high concentrations imparting off-taste, omission of TRPV1 reduced aversion. In a heterologous expression system the Y511A point mutation in the vanilloid pocket of TRPV1 did not affect saccharin and aspartame responses but abolished cyclamate and acesulfame-K activities. The results rationalize artificial sweetener tastes and off-tastes by showing that at low concentrations, these molecules stimulate the gustatory system through the hedonically positive T1R3 pathway, and at higher concentrations, their aversion is partly mediated by TRPV1.

Full Text

Duke Authors

Cited Authors

  • Riera, CE; Vogel, H; Simon, SA; Damak, S; le Coutre, J

Published Date

  • November 28, 2008

Published In

Volume / Issue

  • 376 / 4

Start / End Page

  • 653 - 657

PubMed ID

  • 18804451

Pubmed Central ID

  • 18804451

Electronic International Standard Serial Number (EISSN)

  • 1090-2104

Digital Object Identifier (DOI)

  • 10.1016/j.bbrc.2008.09.029

Language

  • eng

Conference Location

  • United States