Cited by 36Neuroendocrine regulation and behaviorNeuropeptides and Animal PhysiologyRegulation of Appetite and Obesity

Neonatal melanocortin receptor agonist treatment reduces play fighting and promotes adult attachment in prairie voles in a sex-dependent manner

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Barrett, Catherine E., Modi, Meera E., Zhang, Billy C., Walum, Hasse, Inoue, Kiyoshi, Young, Larry J.·2014·Neuropharmacology

Abstract

The melanocortin receptor (MCR) system has been studied extensively for its role in feeding and sexual behavior, but effects on social behavior have received little attention. α-MSH interacts with neural systems involved in sociality, including oxytocin, dopamine, and opioid systems. Acute melanotan-II (MTII), an MC3/4R agonist, potentiates brain oxytocin (OT) release and facilitates OT-dependent partner preference formation in socially monogamous prairie voles. Here we examined the long-term impact of early-life MCR stimulation on hypothalamic neuronal activity and social development in prairie voles. Male and female voles were given daily subcutaneous injections of 10 mg/kg MTII or saline between postnatal days (PND) 1-7. Neonatally-treated males displayed a reduction in initiated play fighting bouts as juveniles compared to control males. Neonatal exposure to MTII facilitated partner preference formation in adult females, but not males, after a brief cohabitation with an opposite-sex partner. Acute MTII injection elicited a significant burst of the immediate early gene EGR-1 immunoreactivity in hypothalamic OT, vasopressin, and corticotrophin releasing factor neurons, when tested in PND 6-7 animals. Daily neonatal treatment with 1 mg/kg of a more selective, brain penetrant MC4R agonist, PF44687, promoted adult partner preferences in both females and males compared with vehicle controls. Thus, developmental exposure to MCR agonists lead to a persistent change in social behavior, suggestive of structural or functional changes in the neural circuits involved in the formation of social relationships.

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Crossref · 10.1016/j.neuropharm.2014.05.041

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Authors
Barrett, C. E., Modi, M. E., Zhang, B. C., Walum, H., Inoue, K., & Young, L. J.
Affiliations
Emory University (US)
Corresponding author
Barrett, Catherine E.
Venue
Neuropharmacology
Publisher
Elsevier BV
Published
2014-10
Volume
85
Pages
357-366
ISSN
0028-3908 (ISSN-L)
OpenAlex
W1986596088
Cited by
34
References
86
Citations by year
2026: 1 · 2024: 1 · 2022: 1 · 2020: 1 · 2019: 1 · 2018: 5 · 2017: 5 · 2016: 6 · 2015: 11 · 2014: 2
FWCI
12.36
Type
journal article
Language
en
Open access
Locations
  • Neuropharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Autism Speaks (AS7745)
  • Pfizer
  • National Institutes of Health (P51OD011132)
  • Yerkes National Primate Research Center, Emory University
  • National Institute of Mental Health (R01MH096983)
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
melanocortin receptors, melanotan II, Microtus ochrogaster, social behavior, mate preferences, play fighting, adult attachment, oxytocin, vasopressin, corticotropin-releasing factor, EGR1, hypothalamus, sex differences, MC4R agonist, social monogamy
MeSH terms
Aggression, alpha-MSH, Animals, Animals, Newborn, Behavior, Animal, Arvicolinae, Female, Hypothalamus, Male, Neurons, Pair Bond, Peptides, Cyclic, Play and Playthings, Psychotropic Drugs, Random Allocation, Sex Characteristics, Receptor, Melanocortin, Type 3, Receptor, Melanocortin, Type 4, Early Growth Response Protein 1

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