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Prenatal and gestational cocaine exposure: Effects on the oxytocin system and social behavior with implications for

S K Williams1, J M Johns2

  • 1Section on Neural Gene Expression, National Institute of Mental Health, Bethesda, MD, United States.

Pharmacology, Biochemistry, and Behavior
|July 25, 2013
PubMed

Insights

Prenatal cocaine exposure (PCE) in rats impairs social behaviors and disrupts oxytocin (Oxt) signaling. Maternal care deficits exacerbate these effects, highlighting drug abuse impacts on offspring development.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Toxicology

Background:

  • Drug abuse during pregnancy poses significant public health risks, impacting offspring development.
  • Prenatal cocaine exposure (PCE) in rats leads to social behavior deficits and altered neuroendocrine function.
  • Maternal care is crucial for social development, and cocaine use during pregnancy disrupts this vital interaction.

Purpose of the Study:

  • To investigate the distinct and combined effects of PCE and cocaine-induced maternal care deficits on social behaviors and oxytocin (Oxt) signaling in offspring.
  • To understand the developmental trajectory of these effects from neonate to adulthood.

Main Methods:

  • Utilized a rat model to study the effects of prenatal cocaine exposure (PCE).
  • Assessed social behaviors, aggression, and oxytocin (Oxt) levels and mRNA expression in offspring.
  • Examined the influence of rearing by cocaine-exposed mothers on offspring outcomes.

Main Results:

  • PCE resulted in decreased social behaviors and increased aggression in adolescent and adult rats.
  • Rearing by cocaine-exposed mothers exacerbated PCE-induced behavioral deficits.
  • Maternal cocaine exposure, independent of PCE, altered Oxt signaling in specific brain regions, with dynamic effects observed in neonates.

Conclusions:

  • Both PCE and disrupted maternal care contribute to social behavior deficits, with synergistic effects when combined.
  • Oxytocin (Oxt) signaling is dynamically regulated early in development and is sensitive to both direct drug exposure and the early life environment.
  • Understanding these interactions is crucial for addressing the long-term consequences of prenatal drug exposure and potential intergenerational transmission of addiction.

Keywords:
AddictionAggressionMaternal behaviorOxytocinPrenatal cocaineSocial behavior

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