Photoperiodic Regulation of Estrogen-Dependent Aggression

Sarah A. Laredo, Brian C. Trainor

Research output: Chapter in Book/Report/Conference proceedingChapter


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.

Original languageEnglish (US)
Title of host publicationBrain Aromatase, Estrogens, and Behavior
PublisherOxford University Press
ISBN (Print)9780199979837, 9780199841196
StatePublished - Jan 24 2013


  • Aggression
  • Estradiol
  • Extracellular signal-regulated kinase
  • Melatonin
  • Nongenomic
  • Peromyscus
  • Photoperiod
  • Social behavior

ASJC Scopus subject areas

  • Neuroscience(all)


Dive into the research topics of 'Photoperiodic Regulation of Estrogen-Dependent Aggression'. Together they form a unique fingerprint.

Cite this