Cited by 163Child Abuse and TraumaStress Responses and CortisolNeuroendocrine regulation and behavior

Maternal separation with early weaning: A novel mouse model of early life neglect

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George, Elizabeth D, Bordner, Kelly A, Elwafi, Hani M, Simen, Arthur A·2010·BMC Neuroscience

Abstract

BACKGROUND: Childhood adversity is associated with increased risk for mood, anxiety, impulse control, and substance disorders. Although genetic and environmental factors contribute to the development of such disorders, the neurobiological mechanisms involved are poorly understood. A reliable mouse model of early life adversity leading to lasting behavioral changes would facilitate progress in elucidating the molecular mechanisms underlying these adverse effects. Maternal separation is a commonly used model of early life neglect, but has led to inconsistent results in the mouse. RESULTS: In an effort to develop a mouse model of early life neglect with long-lasting behavioral effects in C57BL/6 mice, we designed a new maternal separation paradigm that we call Maternal Separation with Early Weaning (MSEW). We tested the effects of MSEW on C57BL/6 mice as well as the genetically distinct DBA/2 strain and found significant MSEW effects on several behavioral tasks (i.e., the open field, elevated plus maze, and forced swim test) when assessed more than two months following the MSEW procedure. Our findings are consistent with MSEW causing effects within multiple behavioral domains in both strains, and suggest increased anxiety, hyperactivity, and behavioral despair in the MSEW offspring. Analysis of pup weights and metabolic parameters showed no evidence for malnutrition in the MSEW pups. Additionally, strain differences in many of the behavioral tests suggest a role for genetic factors in the response to early life neglect. CONCLUSIONS: These results suggest that MSEW may serve as a useful model to examine the complex behavioral abnormalities often apparent in individuals with histories of early life neglect, and may lead to greater understanding of these later life outcomes and offer insight into novel therapeutic strategies.

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Crossref · 10.1186/1471-2202-11-123

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  • Neglected rodents exhibited significantly elevated corticosterone levels, indicating a dysregulated HPA axis response and heightened sensitivity to stress.

    “The same rodents also exhibited significantly elevated corticosterone levels, indicating a dysregulated HPA axis response and, thus, heightened sensitivity to stress.”

    From Childhood Trauma, the HPA Axis and Psychiatric Illnesses: A Targeted Literature Synthesis (2022) · cites this paper as [145]

    The Results (Effects of MSEW; page not provided) report no significant effect of maternal separation with early weaning on serum corticosterone at either measured age. The Discussion likewise says there was no MSEW-induced increase in corticosterone, contrary to the claimed significant elevation and its proposed HPA-axis interpretation. (LLM, conf=0.93)

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  • Neglected rodent offspring have shown increased susceptibility to anxiety and depressive-like behaviors when exposed to stress in both adolescence and adulthood.

    “Neglected rodent offspring have shown increased susceptibility to anxiety and depressive-like behaviors when exposed to stress in both adolescence and adulthood (145, 146).”

    From Childhood Trauma, the HPA Axis and Psychiatric Illnesses: A Targeted Literature Synthesis (2022) · cites this paper as [145]

    The Discussion reports increased anxiety-like behavior after maternal separation with early weaning and increased depressive-like behavior in D2 mice on the forced swim test; B6 mice were relatively unaffected on that test. The Results (Behavioral Testing; page unavailable) state that mice were tested at 65–80 days of age, not during adolescence. The Discussion also describes enhanced vulnerability under higher stress as a possibility requiring further research, rather than an established result. (LLM, conf=0.90)

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  • MSEW increases both anxiety levels and hyperactivity in adulthood.

    “This developmental manipulation has been shown to increase both anxiety levels and hyperactivity in adulthood (11), suggesting it has strong translational validity”
  • The combination of early weaning with maternal separation results in increased hyperactivity in mice.

    “The combination of early weaning with maternal separation also results in increased hyperactivity in mice (11).”

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Authors
George, E. D., Bordner, K. A., Elwafi, H. M., & Simen, A. A.
Affiliations
Yale University (US)
Corresponding author
Simen, Arthur A
Venue
BMC Neuroscience
Published
2010-09-29
Volume
11
Issue
1
Pages
123-123
ISSN
1471-2202 (ISSN-L)
OpenAlex
W2079464767
Cited by
163
References
97
Citations by year
2026: 11 · 2025: 16 · 2024: 10 · 2023: 8 · 2022: 14 · 2021: 15 · 2020: 17 · 2019: 12 · 2018: 6 · 2017: 8 · 2016: 8 · 2015: 6 · 2014: 5 · 2013: 11 · 2012: 5
FWCI
9.46
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • BMC Neuroscience (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • U.S. Department of Health and Human Services
  • Yale University
  • National Institutes of Health (1s10rr019895-01)
  • National Institute on Alcohol Abuse and Alcoholism (P50-AA-A06377)
  • National Institute on Aging (AG030970, P01AG030004, K08AG030970)
  • National Heart, Lung, and Blood Institute (T35-HL07649-22, T35HL007649)
  • National Institute of Mental Health (MH 14276, T32 MH14276, T32MH014276)
  • National Institute on Drug Abuse (DA022251, R03DA022251, RR19895)
  • National Center for Research Resources (RR 19895, RR024138, KL2RR024138)
Topics
  • Social Sciences › Psychology › Clinical Psychology › Child Abuse and Trauma
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
Keywords
maternal separation, early weaning, childhood adversity, mouse model, C57BL/6 mice, DBA/2 mice, anxiety, hyperactivity, behavioral despair, strain differences, genetic factors, mood and anxiety disorders, offspring behavior
MeSH terms
Aging, Animals, Anxiety, Anxiety, Separation, Behavior, Animal, Body Weight, Child, Child Abuse, Depression, Disease Models, Animal, Humans, Maternal Deprivation, Mice, Inbred C57BL, Mice, Inbred DBA, Motor Activity, Species Specificity, Swimming, Weaning, Mice

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