Research Article

Loss of Sex Discrimination and Male-Male Aggression in Mice Deficient for TRP2

Science  22 Feb 2002:
Vol. 295, Issue 5559, pp. 1493-1500
DOI: 10.1126/science.1069259

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Abstract

The mouse vomeronasal organ (VNO) is thought to mediate social behaviors and neuroendocrine changes elicited by pheromonal cues. The molecular mechanisms underlying the sensory response to pheromones and the behavioral repertoire induced through the VNO are not fully characterized. Using the tools of mouse genetics and multielectrode recording, we demonstrate that the sensory activation of VNO neurons requires TRP2, a putative ion channel of the transient receptor potential family that is expressed exclusively in these neurons. Moreover, we show that male mice deficient in TRP2 expression fail to display male-male aggression, and they initiate sexual and courtship behaviors toward both males and females. Our study suggests that, in the mouse, sensory activation of the VNO is essential for sex discrimination of conspecifics and thus ensures gender-specific behavior.

  • * Present address: Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, MO 63110, USA.

  • To whom correspondence should be addressed. E-mail: dulac{at}fas.harvard.edu

  • Present address: Wolfson Institute of Biomedical Research, University College London, London WC1E 6BT, UK.

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