Cited by 833Neuroendocrine regulation and behaviorOlfactory and Sensory Function StudiesNeuropeptides and Animal Physiology

Oxytocin receptor distribution reflects social organization in monogamous and polygamous voles

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Insel, T R, Shapiro, L E·1992·Proceedings of the National Academy of Sciences

Abstract

The neuropeptide oxytocin has been implicated in the mediation of several forms of affiliative behavior including parental care, grooming, and sex behavior. Here we demonstrate that species from the genus Microtus (voles) selected for differences in social affiliation show contrasting patterns of oxytocin receptor expression in brain. By in vitro receptor autoradiography with an iodinated oxytocin analogue, specific binding to brain oxytocin receptors was observed in both the monogamous prairie vole (Microtus ochrogaster) and the polygamous montane vole (Microtus montanus). In the prairie vole, oxytocin receptor density was highest in the prelimbic cortex, bed nucleus of the stria terminalis, nucleus accumbens, midline nuclei of the thalamus, and the lateral aspects of the amygdala. These brain areas showed little binding in the montane vole, in which oxytocin receptors were localized to the lateral septum, ventromedial nucleus of the hypothalamus, and cortical nucleus of the amygdala. Similar differences in brain oxytocin receptor distribution were observed in two additional species, the monogamous pine vole (Microtus pinetorum) and the polygamous meadow vole (Microtus pennsylvanicus). Receptor distributions for two other neurotransmitter systems implicated in the mediation of social behavior, benzodiazepines, and mu opioids did not show comparable species differences. Furthermore, in the montane vole, which shows little affiliative behavior except during the postpartum period, brain oxytocin receptor distribution changed within 24 hr of parturition, concurrent with the onset of maternal behavior. We suggest that variable expression of the oxytocin receptor in brain may be an important mechanism in evolution of species-typical differences in social bonding and affiliative behavior.

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Crossref · 10.1073/pnas.89.13.5981

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Authors
Insel, T. R., & Shapiro, L. E.
Affiliations
National Institute of Mental Health (US)
Venue
Proceedings of the National Academy of Sciences
Published
1992-07
Volume
89
Issue
13
Pages
5981-5985
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1998107589
Cited by
833
References
36
Citations by year
2026: 21 · 2025: 18 · 2024: 28 · 2023: 25 · 2022: 26 · 2021: 38 · 2020: 39 · 2019: 27 · 2018: 43 · 2017: 52 · 2016: 45 · 2015: 37 · 2014: 41 · 2013: 41 · 2012: 37
FWCI
15.12
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Sensory Systems › Olfactory and Sensory Function Studies
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
oxytocin receptor, social organization, monogamy, polygamy, voles, Microtus ochrogaster, montane vole, pine vole, Microtus pennsylvanicus, affiliative behavior, social bonding, maternal behavior, childbirth, brain receptor distribution, prelimbic cortex, bed nucleus of the stria terminalis, nucleus accumbens, amygdala, lateral septum, benzodiazepine receptor, mu-opioid receptor, Microtus
MeSH terms
Animals, Behavior, Animal, Brain, Brain Mapping, Arvicolinae, Enkephalins, Flunitrazepam, Lactation, Oxytocin, Receptors, Angiotensin, Receptors, Opioid, Receptors, GABA-A, Social Behavior, Species Specificity, Receptors, Opioid, mu, Receptors, Oxytocin, Enkephalin, Ala(2)-MePhe(4)-Gly(5)-

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