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Published in: Brain Structure and Function 4/2011

01-11-2011 | Original Article

Differential regulation of catechol-O-methyltransferase expression in a mouse model of aggression

Authors: Stephen D. Ginsberg, Shaoli Che, Audrey Hashim, Jiri Zavadil, Robert Cancro, Sang H. Lee, Eva Petkova, Henry W. Sershen, Jan Volavka

Published in: Brain Structure and Function | Issue 4/2011

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Abstract

This study was designed to understand molecular and cellular mechanisms underlying aggressive behaviors in mice exposed to repeated interactions in their homecage with conspecifics. A resident–intruder procedure was employed whereby two males were allowed to interact for 10 min trials, and aggressive and/or submissive behaviors (e.g., degree of attacking, biting, chasing, grooming, rearing, or upright posture) were assessed. Following 10 days of behavioral trials, brains were removed and dissected into specific regions including the cerebellum, frontal cortex, hippocampus, midbrain, pons, and striatum. Gene expression analysis was performed using real-time quantitative polymerase-chain reaction (qPCR) for catechol-O-methyltransferase (COMT) and tyrosine hydroxylase (TH). Compared to naive control mice, significant up regulation of COMT expression of residents was observed in the cerebellum, frontal cortex, hippocampus, midbrain, and striatum; in all of these brain regions the COMT expression of residents was also significantly higher than that of intruders. The intruders also had a significant down regulation (compared to naive control mice) within the hippocampus, indicating a selective decrease in COMT expression in the hippocampus of submissive subjects. Immunoblot analysis confirmed COMT up regulation in the midbrain and hippocampus of residents and down regulation in intruders. qPCR analysis of TH expression indicated significant up regulation in the midbrain of residents and concomitant down regulation in intruders. These findings implicate regionally- and behaviorally-specific regulation of COMT and TH expression in aggressive and submissive behaviors. Additional molecular and cellular characterization of COMT, TH, and other potential targets is warranted within this animal model of aggression.
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Metadata
Title
Differential regulation of catechol-O-methyltransferase expression in a mouse model of aggression
Authors
Stephen D. Ginsberg
Shaoli Che
Audrey Hashim
Jiri Zavadil
Robert Cancro
Sang H. Lee
Eva Petkova
Henry W. Sershen
Jan Volavka
Publication date
01-11-2011
Publisher
Springer-Verlag
Published in
Brain Structure and Function / Issue 4/2011
Print ISSN: 1863-2653
Electronic ISSN: 1863-2661
DOI
https://doi.org/10.1007/s00429-011-0315-z

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