title: Odorant Metabolism Analysis by an Automated Ex Vivo Headspace Gas-Chromatography Method.
abstract: In the olfactory epithelium (OE), odorant metabolizing enzymes have the dual function of volatile component detoxification and active clearance of odorants from the perireceptor environment to respectively maintain the integrity of the tissues and the sensitivity of the detection. Although emphasized by recent studies, this enzymatic mechanism is poorly documented in mammals. Thus, olfactory metabolism has been characterized mainly in vitro and for a limited number of odorants. The automated ex vivo headspace gas-chromatography method that was developed here was validated to account for odorant olfactory metabolism. This method easily permits the measurement of the fate of an odorant in the OE environment, taking into account the odorant gaseous state and the cellular structure of the tissue, under experimental conditions close to physiological conditions and with a high reproducibility. We confirmed here our previous results showing that a high olfactory metabolizing activity of the mammary pheromone may be necessary to maintain a high level of sensitivity toward this molecule, which is critical for newborn rabbit survival. More generally, the method that is presented here may permit the screening of odorants metabolism alone or in mixture or studying the impact of aging, pathology, polymorphism or inhibitors on odorant metabolism.
authors.affiliation: Centre des Sciences du Goût et de l'Alimentation, UMR 6265 CNRS, UMR 1324 INRA, Université de Bourgogne, Agrosup-Dijon, 9E Boulevard Jeanne d'Arc, 21000 Dijon, France.
authors.forename: Philippe
authors.initials: P
authors.lastname: Faure
authors.affiliation: Centre des Sciences du Goût et de l'Alimentation, UMR 6265 CNRS, UMR 1324 INRA, Université de Bourgogne, Agrosup-Dijon, 9E Boulevard Jeanne d'Arc, 21000 Dijon, France.
authors.forename: Arièle
authors.initials: A
authors.lastname: Legendre
authors.affiliation: Centre des Sciences du Goût et de l'Alimentation, UMR 6265 CNRS, UMR 1324 INRA, Université de Bourgogne, Agrosup-Dijon, 9E Boulevard Jeanne d'Arc, 21000 Dijon, France.
authors.forename: Hassan-Ismail
authors.initials: HI
authors.lastname: Hanser
authors.affiliation: Centre des Sciences du Goût et de l'Alimentation, UMR 6265 CNRS, UMR 1324 INRA, Université de Bourgogne, Agrosup-Dijon, 9E Boulevard Jeanne d'Arc, 21000 Dijon, France.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Andriot
authors.affiliation: Centre des Sciences du Goût et de l'Alimentation, UMR 6265 CNRS, UMR 1324 INRA, Université de Bourgogne, Agrosup-Dijon, 9E Boulevard Jeanne d'Arc, 21000 Dijon, France.
authors.forename: Yves
authors.initials: Y
authors.lastname: Artur
authors.affiliation: Centre des Sciences du Goût et de l'Alimentation, UMR 6265 CNRS, UMR 1324 INRA, Université de Bourgogne, Agrosup-Dijon, 9E Boulevard Jeanne d'Arc, 21000 Dijon, France.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Guichard
authors.affiliation: Centre des Sciences du Goût et de l'Alimentation, UMR 6265 CNRS, UMR 1324 INRA, Université de Bourgogne, Agrosup-Dijon, 9E Boulevard Jeanne d'Arc, 21000 Dijon, France.
authors.forename: Gérard
authors.initials: G
authors.lastname: Coureaud
authors.affiliation: Centre des Sciences du Goût et de l'Alimentation, UMR 6265 CNRS, UMR 1324 INRA, Université de Bourgogne, Agrosup-Dijon, 9E Boulevard Jeanne d'Arc, 21000 Dijon, France jean-marie.heydel@u-bourgogne.fr.
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Heydel
mesh_terms: D000818:Animals; D001331:Automation; D002849:Chromatography, Gas / Q000379:methods*; D009812:Odorants / Q000032:analysis*; D009831:Olfactory Mucosa / Q000201:enzymology / Q000378:metabolism*; D011817:Rabbits
keywords: headspace gas-chromatography; mammary pheromone; odorant metabolizing enzymes; olfaction; olfactory epithelium; perireceptor events; rabbit (Oryctolagus cuniculus)