Cited by 201Neuroendocrine regulation and behaviorNeuropeptides and Animal PhysiologyOlfactory and Sensory Function Studies

Sex differences in oxytocin receptor binding in forebrain regions: correlations with social interest in brain region- and sex-specific ways

Dumais, Kelly M., Bredewold, Remco, Mayer, Thomas E., Veenema, Alexa H.·2013·Hormones and Behavior

Abstract

Social interest reflects the motivation to approach a conspecific for the assessment of social cues and is measured in rats by the amount of time spent investigating conspecifics. Virgin female rats show lower social interest towards unfamiliar juvenile conspecifics than virgin male rats. We hypothesized that the neuropeptide oxytocin (OT) may modulate sex differences in social interest because of the involvement of OT in pro-social behaviors. We determined whether there are sex differences in OT system parameters in the brain and whether these parameters would correlate with social interest. We also determined whether estrus phase or maternal experience would alter low social interest and whether this would correlate with changes in OT system parameters. Our results show that regardless of estrus phase, females have significantly lower OT receptor (OTR) binding densities than males in the majority of forebrain regions analyzed, including the nucleus accumbens, caudate putamen, lateral septum, bed nucleus of the stria terminalis, medial amygdala, and ventromedial hypothalamus. Interestingly, male social interest correlated positively with OTR binding densities in the medial amygdala, while female social interest correlated negatively with OTR binding densities in the central amygdala. Proestrus/estrus females showed similar social interest to non-estrus females despite increased OTR binding densities in several forebrain areas. Maternal experience had no immediate or long-lasting effects on social interest or OT brain parameters except for higher OTR binding in the medial amygdala in primiparous females. Together, these findings demonstrate that there are robust sex differences in OTR binding densities in multiple forebrain regions of rats and that OTR binding densities correlate with social interest in brain region- and sex-specific ways.

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Crossref · 10.1016/j.yhbeh.2013.08.012

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Authors
Dumais, K. M., Bredewold, R., Mayer, T. E., & Veenema, A. H.
Affiliations
Boston College (US)
Corresponding author
Dumais, Kelly M.
Venue
Hormones and Behavior
Publisher
Elsevier BV
Published
2013-09
Volume
64
Issue
4
Pages
693-701
ISSN
0018-506X (ISSN-L)
OpenAlex
W1971328065
Cited by
201
References
56
Citations by year
2026: 10 · 2025: 15 · 2024: 8 · 2023: 14 · 2022: 17 · 2021: 16 · 2020: 20 · 2019: 20 · 2018: 23 · 2017: 20 · 2016: 15 · 2015: 12 · 2014: 11
FWCI
18.96
Type
journal article
Language
en
Open access
closed
Locations
  • Hormones and Behavior (publishedVersion)
  • PubMed (publishedVersion)
Funders
Boston College
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Neuroscience › Sensory Systems › Olfactory and Sensory Function Studies
Keywords
oxytocin receptor, oxytocin, sex differences, social interest, forebrain, estrus phase, maternal experience, medial amygdala, central amygdala, nucleus accumbens, caudate-putamen, lateral septum, bed nucleus of the stria terminalis, ventromedial hypothalamus, prosocial behavior, virgin female rats
MeSH terms
Animals, Behavior, Animal, Brain Mapping, Female, Male, Motivation, Protein Binding, Sex Characteristics, Social Behavior, Prosencephalon, Rats, Wistar, Receptors, Oxytocin, Rats

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