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Chem Senses


Title:Removal of the vomeronasal organ blocks the stress-induced hyperthermia response to alarm pheromone in male rats
Author(s):Kiyokawa Y; Kikusui T; Takeuchi Y; Mori Y;
Address:"Laboratory of Veterinary Ethology, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan. kiyokawa-ns@umin.ac.jp"
Journal Title:Chem Senses
Year:2007
Volume:20061027
Issue:1
Page Number:57 - 64
DOI: 10.1093/chemse/bjl036
ISSN/ISBN:0379-864X (Print) 0379-864X (Linking)
Abstract:"Previously, we reported that male Wistar rats release alarm pheromone from their perianal region, which aggravates stress-induced hyperthermia (SIH) in pheromone-recipient rats. The subsequent discovery that this pheromone could be trapped in water enabled us to expose recipients to the pheromone in their home cages. Despite its apparent influence on autonomic and behavioral functions, we still had no clear evidence as to whether the alarm pheromone was perceived by the main olfactory system (MOS) or by the vomeronasal system. In this study, we investigated this question by exposing 3 types of recipients to alarm pheromone in their home cages: intact males (Intact), vomeronasal organ-excised males (VNX), and sham-operated males (Sham). The Intact and Sham recipients showed aggravated SIH in response to alarm pheromone, whereas the VNX recipients did not. In addition, the results of the habituation/dishabituation test and soybean agglutinin binding to the accessory olfactory bulb verified the complete ablation of the vomeronasal organ (VNO) with a functional MOS in the pheromone recipients. These results strongly suggest that male rats perceive alarm pheromone with the VNO"
Keywords:"Animals Behavior, Animal/drug effects Fever/*physiopathology Male Pheromones/*pharmacology Rats Rats, Wistar Vomeronasal Organ/*surgery;"
Notes:"MedlineKiyokawa, Yasushi Kikusui, Takefumi Takeuchi, Yukari Mori, Yuji eng Research Support, Non-U.S. Gov't England 2006/10/31 Chem Senses. 2007 Jan; 32(1):57-64. doi: 10.1093/chemse/bjl036. Epub 2006 Oct 27"

 
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