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Neuroscience


Title:Role of the vomeronasal system in intersexual attraction in female mice
Author(s):Martinez-Ricos J; Agustin-Pavon C; Lanuza E; Martinez-Garcia F;
Address:"Departament de Biologia Funcional i Antropologia Fisica, Facultat de Ciencies Biologiques, Universitat de Valencia, C. Dr. Moliner 50, Burjassot, Spain"
Journal Title:Neuroscience
Year:2008
Volume:20080213
Issue:2
Page Number:383 - 395
DOI: 10.1016/j.neuroscience.2008.02.002
ISSN/ISBN:1873-7544 (Electronic) 0306-4522 (Linking)
Abstract:"Although it is generally accepted that rodents' sociosexual behavior relies mainly on chemosignals, the specific roles played by the vomeronasal and olfactory systems in detecting these signals are presently unclear. This work reports the results of three experiments aimed at clarifying the role of the vomeronasal system on gender recognition and intersexual attraction, by analyzing the effects of lesions of the accessory olfactory bulbs (AOB) in chemically naive female mice. The first experiment demonstrates that lesions of the AOB abolish the preference that females show for male-soiled bedding in tests in which the females can contact the bedding, thus having access to both volatile and involatile male chemosignals. The second experiment shows that airborne male-derived chemosignals are not attractive to intact, chemically naive females but tend to be preferentially explored by females whose AOB has been lesioned. However, repeated exposure to male-soiled bedding has opposite effects in sham-operated and AOB-lesioned female mice. Whereas after this experience sham-operated females show an (acquired) attraction toward male airborne chemosignals, in AOB-lesioned females the same experience makes male-derived volatiles aversive. Finally, in the third experiment we have confirmed that our AOB-lesioned females are able to detect urine-borne male odorants, as well as to discriminate them from the synthetic terpene geraniol. These findings strongly suggest that in mice, the involatile male sexual pheromone that is intrinsically attractive is detected by the vomeronasal system of the females. In addition, the repeated experience of females with male-soiled bedding would probably allow the association of this pheromone, acting as unconditioned stimulus, with olfactory stimuli (odorants) that therefore would become conditioned attractors to the females"
Keywords:"Animals Conditioning, Psychological/drug effects Data Interpretation, Statistical Exploratory Behavior/drug effects Female Habituation, Psychophysiologic/drug effects Male Mice Olfactory Bulb/anatomy & histology/physiology Olfactory Mucosa/anatomy & histo;Neuroscience;"
Notes:"MedlineMartinez-Ricos, J Agustin-Pavon, C Lanuza, E Martinez-Garcia, F eng Research Support, Non-U.S. Gov't 2008/04/04 Neuroscience. 2008 May 2; 153(2):383-95. doi: 10.1016/j.neuroscience.2008.02.002. Epub 2008 Feb 13"

 
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