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Influence of prenatal maternal stress on the immunocompetence of the offspring

S K Sobrian1, V T Vaughn, E F Bloch

  • 1Department of Pharmacology, Howard University College of Medicine, Washington, DC 20059.

Pharmacology, Biochemistry, and Behavior
|October 1, 1992
PubMed

Insights

Prenatal maternal stress, including environmental and psychological stress, significantly reduced immunoglobulin G (IgG) levels in rat offspring. Postnatal stress had varied effects on immune responses, depending on the type of prenatal stress and offspring sex.

Area of Science:

  • Neuroimmunology
  • Developmental Psychology
  • Endocrinology

Background:

  • Prenatal maternal stress is a significant factor influencing offspring development.
  • The impact of prenatal stress on the developing immune system requires further investigation.
  • Understanding these effects is crucial for predicting long-term health outcomes.

Purpose of the Study:

  • To investigate the effects of prenatal maternal stress on offspring's humoral immunocompetence.
  • To assess hormonal and immunological responses to postnatal stress in offspring exposed to prenatal stress.
  • To determine if prenatal stress alters immune parameters and stress reactivity in rat offspring.

Main Methods:

  • Gravid Sprague-Dawley rats were exposed to prenatal environmental stress (PES) or prenatal psychological stress (PPS).
  • Control pregnant rats (PC) were handled normally.
  • Offspring serum corticosterone (CCS) and immunoglobulin G (IgG) levels were measured from birth to postnatal day 28.
  • Offspring were subjected to postnatal environmental stress from postnatal day 29-33, with immune and hormonal status assessed on day 34.

Main Results:

  • Prenatal environmental stress (PES) and prenatal psychological stress (PPS) offspring exhibited reduced IgG levels on postnatal day 0.
  • PES offspring showed reduced IgG levels on postnatal days 7 and 28.
  • Postnatal stress was immunosuppressive in control pups but had varied effects on PES and PPS offspring, with PES males showing enhanced immune function.
  • These immune changes were independent of corticosterone levels and maternal-pup interactions.

Conclusions:

  • Prenatal maternal stress can significantly alter the development of humoral immunocompetence in rat offspring.
  • The offspring's immune system and stress response are modulated by prenatal stress exposure.
  • These findings highlight the long-lasting impact of the prenatal environment on immune system development and function.

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