Cited by 155Neuroendocrine regulation and behaviorStress Responses and CortisolNeuropeptides and Animal Physiology

Neonatal manipulations of oxytocin alter expression of oxytocin and vasopressin immunoreactive cells in the paraventricular nucleus of the hypothalamus in a gender-specific manner

Yamamoto, Y, Cushing, B.S, Kramer, K.M, Epperson, P.D, Hoffman, G.E, Carter, C.S·2004·Neuroscience

Abstract

Early postnatal manipulations of oxytocin have long-term behavioral and physiological consequences; the present study examined the hypothesis that oxytocin or its absence influences the subsequent expression of either oxytocin or arginine vasopressin in the CNS. On postnatal day 1 female and male prairie voles (Microtus ochrogaster) received a single i.p. injection of oxytocin (3 microg), oxytocin antagonist (0.3 microg), or 50 microl of isotonic saline or were only handled. On postnatal days 1, 8 and 21, brains were fixed, sectioned and stained for oxytocin or vasopressin immunoreactivity and analyzed as a function of age, treatment and sex. Both oxytocin and vasopressin immunoreactivity were observed on day 1 in the supraoptic and paraventricular nuclei (PVN) of the hypothalamus. Numbers of oxytocin and vasopressin neurons increased with age in both nuclei. Females treated on postnatal day 1 with oxytocin or oxytocin antagonist displayed a significant increase in oxytocin immunoreactivity on day 21 in the PVN. In contrast, males treated with antagonist tended to have decreased vasopressin immunoreactivity in the same region. These results revealed that the effects of neonatal manipulation of oxytocin are age-dependent, site-specific and sexually dimorphic. The long-lasting effects of neonatal exposure to exogenous oxytocin and oxytocin antagonist indicate a role for oxytocin in the development of the CNS during the neonatal period, affecting the development of the oxytocinergic system in females and the vasopressinergic system in males. The developmental effects observed suggest one possible mechanism by which neonatal exposure to oxytocin or neonatal inhibition of endogenous oxytocin produces long-lasting behavioral and physiological alterations and could play a role in the development of male- and female-typical behavior.

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Crossref · 10.1016/j.neuroscience.2004.02.028

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  • Manipulation of OT/AVP levels via direct exposures to exogenous hormones, agonists, or alteration of the social environment can significantly modify the number of OT, AVP, and TH neurons in the PVN, resulting in anxiety-like behavior and alterations of prototypical male and female sociosexual behavior.

    “Manipulation of OT/AVP levels via direct exposures to exogenous hormones, agonists, or alteration of the social environment can significantly modify the number of OT, AVP, and TH neurons in the PVN, thereby resulting in anxiety-like behavior and alterations of prototypical male and female sociosexual behavior (123–127).”
  • i.p. injections of either OT or OTR antagonist on postnatal day 1 induced sex-specific changes in OT, ERα, and V1aR in adult prairie voles.

    “i.p. injections of either OT or OTR antagonist on postnatal day 1 induced sex-specific changes in OT, estrogen receptor alpha (ERα), and V1aR in adult prairie voles.”
  • In female, but not male, prairie voles, neonatal OT and OTR antagonist both increased OT-immunoreactivity in the PVN.

    “in females, but not males, neonatal OT and OTR antagonist both increased OT-immunoreactivity in the PVN”
  • In female prairie voles, neonates treated with oxytocin and an oxytocin receptor antagonist have increases in oxytocin immunoreactivity within the paraventricular nucleus by 3 weeks of age.

    “In female prairie voles, neonates treated with Oxt and an OTA have increases in Oxt immunoreactivity (Oxt-ir) within the PVN by 3 weeks of age.”
  • In male prairie voles, oxytocin has no effect on oxytocin immunoreactivity, but treatment with an oxytocin receptor antagonist decreases arginine vasopressin immunoreactivity in the paraventricular nucleus.

    “Yet, in males, Oxt has no effect on Oxt-ir, but treatment with an OTA does decrease arginine vasopressin (Avp) immunoreactivity in the PVN (27).”

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Authors
Yamamoto, Y., Cushing, B. S., Kramer, K. M., Epperson, P. D., Hoffman, G. E., & Carter, C. S.
Affiliations
  • University of Illinois Chicago (US)
  • University of Maryland, Baltimore (US)
Corresponding author
Cushing, B.S
Venue
Neuroscience
Publisher
Elsevier BV
Published
2004-01
Volume
125
Issue
4
Pages
947-955
ISSN
0306-4522 (ISSN-L)
OpenAlex
W1975654938
Cited by
155
References
50
Citations by year
2025: 3 · 2024: 3 · 2023: 2 · 2022: 5 · 2021: 10 · 2020: 4 · 2019: 6 · 2018: 10 · 2017: 13 · 2016: 13 · 2015: 12 · 2014: 14 · 2013: 7 · 2012: 6
FWCI
8.34
Type
journal article
Language
en
Open access
closed
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • China Scholarship Council
  • National Institute of Mental Health (MH 01992, K01MH001992)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD 41293, P01HD038490, HD38490, F32HD041293)
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
oxytocin, vasopressin, paraventricular nucleus, hypothalamus, neonatal manipulation, oxytocin antagonist, sex differences, Microtus ochrogaster, supraoptic nucleus, postnatal development, social behavior
MeSH terms
Animals, Animals, Newborn, Arginine Vasopressin, Arvicolinae, Female, Image Processing, Computer-Assisted, Immunohistochemistry, Male, Neurons, Oxytocin, Paraventricular Hypothalamic Nucleus, Sexual Behavior, Animal, Sex Factors

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