Related Experiment Videos
Prenatal restraint stress and long-term affective consequences.
D L A Van den Hove1, C E Blanco, B Aendekerk
1Department of Pediatric, Research Institute Growth and Development, University of Maastricht, Maastricht, The Netherlands. d.vandenhove@np.unimaas.nl
Developmental Neuroscience
|September 3, 2005
Summary
Prenatal stress in rats altered anxiety-like behaviors and stress hormone levels in offspring. However, the study suggests potential adaptive effects, indicating a complex relationship between prenatal stress and development.
Area of Science:
- Neuroscience
- Developmental Psychology
- Endocrinology
Background:
- Chronic prenatal stress is linked to later-life behavioral and mood disorders.
- Understanding the developmental impact of prenatal stress is crucial for identifying interventions.
Purpose of the Study:
- To investigate the long-term effects of prenatal stress on anxiety and depressive-like behaviors in offspring.
- To examine the physiological responses, including corticosterone levels and cell proliferation, in prenatally stressed rats.
Main Methods:
- Pregnant Fischer 344 rats were subjected to restraint and bright light stress during the last week of gestation.
- Offspring were assessed at 6 months using behavioral tests (open field, home cage emergence, forced swim) and corticosterone level measurements.
- Cell proliferation in the dentate gyrus was measured using 5-bromo-2-deoxyuridine.
Main Results:
- Prenatally stressed rats exhibited increased anxiety-like behaviors, spending more time in corners and taking longer to emerge from their home cage.
- No significant differences in immobility were found in the forced swim test, suggesting specific behavioral alterations.
- Prenatally stressed rats displayed lower stress-induced plasma corticosterone levels and no changes in cell proliferation in the dentate gyrus.
Conclusions:
- Prenatal stress can perturb normal anxiety-related development, leading to specific behavioral changes in offspring.
- The observed lower corticosterone levels suggest a potential adaptive or protective effect of prenatal stress that warrants further investigation.
- Genetic factors likely influence the individual response to prenatal stress and its long-term consequences.