Humans and Mice Express Similar Olfactory Preferences

• Published in: PloS one Vol. 4; no. 1; p. e4209
• Main Authors: Mandairon, Nathalie, Poncelet, Johan, Bensafi, Moustafa, Didier, Anne
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 16.01.2009; Public Library of Science (PLoS)
• Subjects: Animals; Behavior; Caenorhabditis elegans; Chemosensory perception; Cognition & reasoning; Cognitive science; Drosophila; Engraving; Experiments; Food intake; Human behavior; Humans; Insects; Mediation; Mice; Neuroscience; Neuroscience/Animal Cognition; Neuroscience/Behavioral Neuroscience; Neuroscience/Sensory Systems; Neurosciences; Newborn babies; Odorants; Odors; Olfactory Perception; Olfactory preferences; Perception; Physicochemical properties; Preferences; Principal components analysis; Psychophysics; Ratings & rankings; Social aspects; Species; Species Specificity; Statistical analysis; Structure-Activity Relationship; Structure-odor relationships; Studies; Wildlife conservation
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0004209

In humans, the pleasantness of odors is a major contributor to social relationships and food intake. Smells evoke attraction and repulsion responses, reflecting the hedonic value of the odorant. While olfactory preferences are known to be strongly modulated by experience and learning, it has been recently suggested that, in humans, the pleasantness of odors may be partly explained by the physicochemical properties of the odorant molecules themselves. If odor hedonic value is indeed predetermined by odorant structure, then it could be hypothesized that other species will show similar odor preferences to humans. Combining behavioral and psychophysical approaches, we here show that odorants rated as pleasant by humans were also those which, behaviorally, mice investigated longer and human subjects sniffed longer, thereby revealing for the first time a component of olfactory hedonic perception conserved across species. Consistent with this, we further show that odor pleasantness rating in humans and investigation time in mice were both correlated with the physicochemical properties of the molecules, suggesting that olfactory preferences are indeed partly engraved in the physicochemical structure of the odorant. That odor preferences are shared between mammal species and are guided by physicochemical features of odorant stimuli strengthens the view that odor preference is partially predetermined. These findings open up new perspectives for the study of the neural mechanisms of hedonic perception.