Cited by 217Child Abuse and TraumaStress Responses and CortisolNeuroendocrine regulation and behavior

Effects of early-life abuse differ across development: infant social behavior deficits are followed by adolescent depressive-like behaviors mediated by the amygdala

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Raineki, Charlis, Cortés, Millie Rincón, Belnoue, Laure, Sullivan, Regina M.·2012·The Journal of Neuroscience

Abstract

Abuse during early life, especially from the caregiver, increases vulnerability to develop later-life psychopathologies such as depression. Although signs of depression are typically not expressed until later life, signs of dysfunctional social behavior have been found earlier. How infant abuse alters the trajectory of brain development to produce pathways to pathology is not completely understood. Here we address this question using two different but complementary rat models of early-life abuse from postnatal day 8 (P8) to P12: a naturalistic paradigm, where the mother is provided with insufficient bedding for nest building; and a more controlled paradigm, where infants undergo olfactory classical conditioning. Amygdala neural assessment (c-Fos), as well as social behavior and forced swim tests were performed at preweaning (P20) and adolescence (P45). Our results show that both models of early-life abuse induce deficits in social behavior, even during the preweaning period; however, depressive-like behaviors were observed only during adolescence. Adolescent depressive-like behavior corresponds with an increase in amygdala neural activity in response to forced swim test. A causal relationship between the amygdala and depressive-like behavior was suggested through amygdala temporary deactivation (muscimol infusions), which rescued the depressive-like behavior in the forced swim test. Our results indicate that social behavior deficits in infancy could serve as an early marker for later psychopathology. Moreover, the implication of the amygdala in the ontogeny of depressive-like behaviors in infant abused animals is an important step toward understanding the underlying mechanisms of later-life mental disease associated with early-life abuse.

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  • Early-life stress effects have been observed after abuse and after maternal deprivation.

    “Early-life stress effects have been found following both abuse (Anda et al., 2006; Maniglio, 2009; Raineki, et al., 2012) and maternal deprivation (Johnson, 2002; Loman and Gunnar, 2010)”
  • Amygdala-dependent deficits are task-specific: amygdala hyperactivity underlies decreased social exploration in adolescence and depressive/anxiety-like behavior in adulthood, in parallel with impaired threat aversion learning and blunted amygdala activation during fear conditioning.

    “Amygdala-dependent deficits are expressed in a task-specific manner: amygdala hyperactivity underlies decreased social exploration in adolescence and depressive and anxiety-like behavior in adulthood (Fig. 2), in parallel with impaired ability to learn aversions to threat and blunted amygdala activation during fear conditioning (Raineki et al., 2012, Sevelinges et al., 2007, Sevelinges et al., 201”
  • Only early life trauma associated with attachment leads to lifelong amygdala-dependent behavioral deficits, such as poor social behavior (onset prior to weaning) and depressive-like behaviors (onset post-weaning).

    “Testing later in life shows that only the early life trauma associated with attachment will lead to lifelong amygdala-dependent behavioral deficits, such as poor social behavior (onset prior to weaning) and depressive-like behaviors (onset post- weaning (Raineki et al., 2012, Raineki et al., 2010b, Sevelinges et al., 2011, Sullivan et al., 2000a, Sullivan et al., 2000b).”
  • Pups exposed to abuse in the low bedding procedure and repeated odor-shock pairings form a disordered attachment to the mother, expressed in decreased approach to maternal odor, less nipple attachment, and amygdala hyperactivity if given CORT injections before testing.

    “This can also be modeled in rodents: pups that were exposed to abuse in the low bedding procedure and repeated odor-shock pairings form a disordered attachment to the mother, expressed in decreased approach behavior towards the maternal odor, less nipple attachment, and amygdala hyperactivity if given CORT injections before testing (Raineki et al., 2012).”
  • Caregiver abuse in early life produces enhanced aggression, impaired threat response, depressive/anxiety-like behavior, and decreased social exploration.

    “These factors may be compromised in cases of caregiver abuse in early life, which produces enhanced aggression (Marquez et al., 2013), impaired threat response (Perry, in press), depressive and anxiety-like behavior (Raineki et al., 2012, Raineki et al., 2015 and decreased social exploration (Raineki et al., 2015).”

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Authors
Raineki, C., Cortés, M. R., Belnoue, L., & Sullivan, R. M.
Affiliations
New York University (US)
Venue
The Journal of Neuroscience
Published
2012-05-30
Volume
32
Issue
22
Pages
7758-7765
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2063400326
Cited by
217
References
73
Citations by year
2026: 14 · 2025: 15 · 2024: 16 · 2023: 7 · 2022: 19 · 2021: 15 · 2020: 15 · 2019: 22 · 2018: 14 · 2017: 15 · 2016: 18 · 2015: 17 · 2014: 19 · 2013: 9 · 2012: 2
FWCI
17.02
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (1137475)
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
  • National Institutes of Health
  • National Institute of Mental Health (R01MH091451, MH091451)
  • National Institute on Deafness and Other Communication Disorders (DC-009910, R01DC009910)
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
depression-like behavior, amygdala, forced swim test, nest building, c-fos, developmental trajectories, depression vulnerability, pre-weaning period, adolescence, rat model
MeSH terms
Adolescent, Age Factors, Amygdala, Animals, Animals, Newborn, Developmental Disabilities, Conditioning, Classical, Depressive Disorder, Disease Models, Animal, Female, Humans, Male, Maternal Behavior, Maternal Deprivation, Muscimol, Neurons, Olfactory Pathways, Social Behavior Disorders, Social Isolation, Swimming, Vocalization, Animal, Proto-Oncogene Proteins c-fos, Rats, Long-Evans, Rats, GABA-A Receptor Agonists

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