title: Nutri-metabolomics applied to taste perception phenotype: human subjects with high and low sensitivity to taste of fat differ in salivary response to oleic acid.
abstract: Saliva has different functions in the mouth and is involved, for example, in taste perception. Saliva composition can also be modified rapidly by taste stimulation. It remains unclear, however, whether the perceived intensity of a tastant may modulate this response. Based on increasing evidence that fat can be perceived by the taste system and that fat taste perception may be associated with fat intake, the aim of this work was to study if stimulation by a fatty acid (oleic acid) modifies saliva composition differently in subjects highly (sensitive+) or weakly (sensitive-) sensitive to that taste. For that purpose, saliva of two groups of subjects was collected after stimulation by either a control emulsion or an emulsion containing 5.61 mM oleic acid. Saliva was analyzed by 2D electrophoresis and (1)H NMR spectroscopy. The results show that sensitive+ and sensitive- subjects differ in their salivary response in terms of proteome and metabolome composition. Oppositely to sensitive- subjects, sensitive+ subjects responded to oleic acid by increased abundance of polymeric immunoglobulin receptor, rab GDP dissociation inhibitor beta, and organic acids, and decreased abundance of metabolites characteristic of mucins. The results highlight that modification of saliva composition by taste stimulation may be modulated by taste perception.
authors.affiliation: 1 CNRS, UMR6265, UMR Centre des Sciences du Goût et de l'Alimentation , Dijon, France .
authors.forename: Rana
authors.initials: R
authors.lastname: Mounayar
authors.forename: Martine
authors.initials: M
authors.lastname: Morzel
authors.forename: Hélène
authors.initials: H
authors.lastname: Brignot
authors.forename: Marie
authors.initials: M
authors.lastname: Tremblay-Franco
authors.forename: Cécile
authors.initials: C
authors.lastname: Canlet
authors.forename: Géraldine
authors.initials: G
authors.lastname: Lucchi
authors.forename: Patrick
authors.initials: P
authors.lastname: Ducoroy
authors.forename: Gilles
authors.initials: G
authors.lastname: Feron
authors.forename: Eric
authors.initials: E
authors.lastname: Neyraud
mesh_terms: D004041:Dietary Fats / Q000378:metabolism; D004435:Eating; D006801:Humans; D008297:Male; D055432:Metabolomics; D009055:Mouth / Q000502:physiology; D019301:Oleic Acid / Q000378:metabolism*; D010641:Phenotype; D012463:Saliva / Q000737:chemistry*; D055697:Taste Perception / Q000502:physiology*
chemical_list: D004041:Dietary Fats; D019301:Oleic Acid