Cited by 158Stress Responses and CortisolNeuroendocrine regulation and behaviorNeurogenesis and neuroplasticity mechanisms

Behavioural and Neurochemical Consequences of Early Weaning in Rodents

Kikusui, T., Mori, Y.·2009·Journal of Neuroendocrinology

Abstract

Among all mammalian species, pups are highly dependent on their mother not only for nutrition, but also for physical interaction. Therefore, disruption of the mother-pup interaction changes the physiology and behaviour of pups. We review how maternal separation in the early developmental period brings about changes in the behaviour and neuronal systems of the offspring of rats and mice. Early weaning in mice results in adulthood a persistent increase in anxiety-like and aggressive behaviour. The early-weaned mice also show higher hypothalamic-pituitary-adrenal activity in response to novelty stress. Neurochemically, the early-weaned male mice, but not female mice, show precocious myelination in the amygdala, decreased brain-derived neurotrophic factor protein levels in the hippocampus and prefrontal cortex, and reduced bromodeoxyuridine immunoreactivity in the dentate gyrus. Because higher corticosterone levels are persistently observed up to 48 h when the mice are weaned on postnatal day 14, the exposure of the developing brain to higher corticosterone levels may be one of the effects of early weaning. These results suggest that deprivation of the mother-infant interaction during the late lactating period results in behavioural and neurochemical changes in adulthood and that these stress responses are sexually dimorphic (i.e. the male is more vulnerable to early weaning stress).

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Crossref · 10.1111/j.1365-2826.2009.01837.x

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  • Maternal separation in rodent pups is associated with more social instability in adulthood.

    “Maternal separation in rodent pups is associated with greater LHPA axis reactivity (Moriceau et al., 2010), accelerated amygdala development (Moriceau and Sullivan, 2006, Ono et al., 2008), increased anxiety-like behaviors (Romeo et al., 2003), and more social instability in adulthood (Kikusui and Mori, 2009).”

    From The impact of developmental timing for stress and recovery (2015) · cites this paper as Kikusui and Mori, 2009

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Authors
Kikusui, T., & Mori, Y.
Affiliations
Azabu University (JP)
Corresponding author
Kikusui, T.
Venue
Journal of Neuroendocrinology
Publisher
Wiley
Published
2009-03-27
Volume
21
Issue
4
Pages
427-431
ISSN
  • 0953-8194 (ISSN-L)
  • 1365-2826
OpenAlex
W2037070770
Cited by
158
References
45
Citations by year
2026: 4 · 2025: 2 · 2024: 8 · 2023: 6 · 2022: 5 · 2021: 11 · 2020: 11 · 2019: 10 · 2018: 9 · 2017: 15 · 2016: 9 · 2015: 9 · 2014: 11 · 2013: 14 · 2012: 16
FWCI
0.61
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neuroendocrinology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
early weaning, maternal separation, mother-pup interaction, anxiety-like behavior, aggression, hypothalamic-pituitary-adrenal axis, novelty stress, corticosterone, amygdala, brain-derived neurotrophic factor, hippocampus, prefrontal cortex, dentate gyrus, sexual dimorphism, developmental stress, rats, mice
MeSH terms
Aggression, Animals, Anxiety, Brain, Corticosterone, Female, Male, Maternal Deprivation, Myelin Sheath, Play and Playthings, Sex Characteristics, Sex Factors, Stress, Psychological, Time Factors, Weaning, Brain-Derived Neurotrophic Factor, Neurogenesis

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