Cognitive and affective alterations by prenatal and postnatal stress interaction

Area of Science:

• Neuroscience
• Developmental Psychology
• Animal Behavior

Background:

• Antenatal maternal stress impacts fetal neurodevelopment and offspring brain function.
• Understanding the long-term effects of prenatal stress is crucial for developmental health.

Purpose of the Study:

• To investigate the effects of prenatal social and nonsocial stress on cognitive and affective functions in mice.
• To determine if prenatal stress-induced changes are adaptive or detrimental in the context of postnatal stress.

Main Methods:

• Pregnant mice were exposed to repeated social defeat or restraint stress.
• Offspring underwent behavioral tests to assess anxiety, social interaction, and spatial memory.
• Postnatal stress was applied to investigate interactions between prenatal and postnatal stress effects.

Main Results:

• Prenatal stress (social defeat and restraint) led to heightened anxiety and decreased social interaction in adult offspring.
• Prenatal restraint stress, but not social defeat stress, impaired spatial memory.
• When matched with prenatal stress type, postnatal stress mitigated spatial memory impairment but not anxiety or social deficits.

Conclusions:

• Prenatal stress can induce adaptive neurodevelopmental changes that may counteract some effects of postnatal stress.
• These findings suggest prenatal stress responses might prepare offspring for anticipated adverse environments.
• The type of prenatal stress influences the specific cognitive and affective outcomes observed in offspring.