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Brain Aromatase, Estrogens, and Behavior$
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Jacques Balthazart and Gregory Ball

Print publication date: 2012

Print ISBN-13: 9780199841196

Published to Oxford Scholarship Online: January 2013

DOI: 10.1093/acprof:oso/9780199841196.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 13 April 2021

Photoperiodic Regulation of Estrogen-Dependent Aggression

Photoperiodic Regulation of Estrogen-Dependent Aggression

(p.399) Chapter 21 Photoperiodic Regulation of Estrogen-Dependent Aggression
Brain Aromatase, Estrogens, and Behavior

Sarah A. Laredo

Brian C. Trainor

Oxford University Press

Steroid hormones, including estrogens, play an important role in regulating aggressive behaviors in many vertebrate species. Recent studies have demonstrated that the effects of estrogens on aggressive behaviors are dependent on experience. Studies in the rodent genus Peromyscus indicate that estrogens affect aggressive behavior through different mechanisms under different photoperiod schedules. Under winter-like short days, estrogens were found to act rapidly to increase aggression whereas these rapid effects were absent under long days. In contrast estrogens were found to decrease aggression in mice in long days. Our working hypothesis for these results is that rapid effects of estrogens under short days are mediated by nongenomic pathways whereas the longer term effects of estrogens under long days are mediated by the transcriptional effects of estrogens. These data suggest the molecular pathways downstream of estrogen receptors may be subject to regulation by salient environmental cues such as photoperiod.

Keywords:   aggression, estradiol, extracellular signal-regulated kinase, melatonin, nongenomic, Peromyscus, photoperiod, social behavior

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