Cited by 105Neuroendocrine regulation and behaviorNeuropeptides and Animal PhysiologyStress Responses and Cortisol

Impairments in the Initiation of Maternal Behavior in Oxytocin Receptor Knockout Mice

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Rich, Megan E., deCárdenas, Emily J., Lee, Heon-Jin, Caldwell, Heather K.·2014·PLoS ONE

Abstract

Oxytocin (Oxt) acting through its single receptor subtype, the Oxtr, is important for the coordination of physiology and behavior associated with parturition and maternal care. Knockout mouse models have been helpful in exploring the contributions of Oxt to maternal behavior, including total body Oxt knockout (Oxt -/-) mice, forebrain conditional Oxtr knockout (Oxtr FB/FB) mice, and total body Oxtr knockout (Oxtr -/-) mice. Since Oxtr -/- mice are unable to lactate, maternal behavior has only been examined in virgin females, or in dams within a few hours of parturition, and there have been no studies that have examined their anxiety-like and depression-like behavior following parturition. To improve our understanding of how the absence of Oxt signaling affects maternal behavior, mood and anxiety, we designed a study using Oxtr -/- mice that separated nursing behavior from other aspects of maternal care, such as licking and grooming by thelectomizing (i.e. removing the nipples) of Oxtr +/+ mice and sham-thelectomizing Oxtr -/- mice, and pairing both genotypes with a wet nurse. We then measured pup abandonment, maternal behavior, and postpartum anxiety-like and depression-like behaviors. We hypothesized that genetic disruption of the Oxtr would impact maternal care, mood and anxiety. Specifically, we predicted that Oxtr -/- dams would have impaired maternal care and increased anxiety-like and depression-like behaviors in the postpartum period. We found that Oxtr -/- dams had significantly higher levels of pup abandonment compared to controls, which is consistent with previous work in Oxtr FB/FB mice. Interestingly, Oxtr -/- dams that initiated maternal care did not differ from wildtype controls in measures of maternal behavior. We also did not find any evidence of altered anxiety-like or depressive-like behavior in the postpartum period of Oxtr -/- dams. Thus, our data suggest that Oxt lowers the threshold for the initiation of maternal behavior.

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  • Silencing of OT-PVN cells had little effect after virgins began retrieving.

    “However, silencing of OT-PVN cells had little effect after virgins began retrieving (Extended Data Fig. 4b), similar to primiparous dams17.”
  • Oxytocin signaling is important for normal displays of alloparental care.

    “Thus, it appears that Oxt signaling is important for normal displays of alloparental care, which is consistent with its role in lowering the threshold for maternal care in rodents (53–56).”

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Authors
Rich, M. E., deCárdenas, E. J., Lee, H.-J., & Caldwell, H. K.
Affiliations
  • Kent State University (US)
  • Kyungpook National University (KR)
Corresponding author
Caldwell, Heather K.
Venue
PLoS ONE
Published
2014-06-03
Volume
9
Issue
6
Pages
e98839
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2042123980
Cited by
105
References
83
Citations by year
2026: 5 · 2025: 10 · 2024: 6 · 2023: 8 · 2022: 9 · 2021: 14 · 2020: 7 · 2019: 3 · 2018: 9 · 2017: 5 · 2016: 13 · 2015: 13 · 2014: 3
FWCI
16.79
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Kent State University
  • King Saud University
  • Directorate for Biological Sciences
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
oxytocin, oxytocin receptor, maternal behavior, maternal care, childbirth, knockout mice, nursing behavior
MeSH terms
Animals, Anxiety, Behavior, Animal, Female, Maternal Behavior, Receptors, Oxytocin, Mice, Knockout, Mice

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