Programming the Brain: How Maternal Overnutrition Shapes Cognitive Aging in Offspring

Area of Science:

• Neuroscience
• Developmental Biology
• Nutritional Science

Background:

• Maternal overnutrition is a significant factor influencing offspring's long-term metabolic and cognitive health.
• Prenatal diet can disrupt hippocampal function, but its specific impact on spatial memory is not fully understood.

Purpose of the Study:

• To investigate the effects of maternal high-fat diet (HFD) exposure on spatial memory in adult offspring.
• To determine if cognitive deficits are linked to body weight changes.

Main Methods:

• Female mice were fed an HFD for nine weeks pre-pregnancy and during gestation.
• Offspring were tested at postnatal day 90 using the dry maze, a spatial reference memory task.

Main Results:

• Offspring exposed to maternal HFD showed impaired learning acquisition and reduced within-session improvements.
• Deficits in long-term spatial memory retention were observed, with less time spent in the target quadrant.
• Cognitive impairments were independent of offspring body weight at the time of testing.

Conclusions:

• Maternal HFD exposure induces specific spatial memory deficits in adult offspring, potentially via neurodevelopmental changes.
• These findings highlight the critical role of prenatal nutrition in cognitive development and long-term brain health.
• Interventions are needed to address the intergenerational effects of maternal overnutrition on offspring brain function.