Maternal protein malnutrition prolongs sickness behavior in male offspring

Area of Science:

• Neuroscience
• Developmental Biology
• Immunology

Background:

• Maternal nutrition significantly impacts offspring development and health.
• Protein malnutrition during gestation and lactation can have long-lasting effects on progeny.
• Understanding the long-term consequences of early-life nutritional stress is crucial for public health.

Purpose of the Study:

• To investigate the long-term effects of maternal protein malnutrition on the immune response and sickness behavior in adult male rat offspring.
• To assess the impact of lipopolysaccharide (LPS) challenge on behavior, tumor necrosis factor-alpha (TNF-α), and corticosterone levels in offspring exposed to different maternal diets.

Main Methods:

• Female rats were fed normal or hypoproteic diets during gestation and lactation.
• Male offspring were grown to adulthood and challenged with saline or LPS.
• Behavioral tests were conducted 2 and 6 hours post-administration.
• Plasma levels of TNF-α and corticosterone, and body temperature were measured.

Main Results:

• Sickness behavior was observed in all rats 2 hours after LPS administration.
• Maternal protein malnutrition exacerbated sickness behavior at 6 hours post-LPS.
• Offspring of malnourished mothers showed elevated plasma TNF-α and corticosterone levels.

Conclusions:

• Maternal protein malnutrition during critical developmental periods can lead to prolonged sickness behaviors in adult male offspring.
• Early-life nutritional deficiencies may prime the immune system, resulting in an exaggerated response to inflammatory stimuli.
• These findings highlight the importance of adequate maternal nutrition for offspring neuroimmune development and resilience.