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Maternal diet fatty acid composition affects neurodevelopment in rat pups
M D Saste1, J D Carver, J E Stockard
1Department of Pediatrics, Division of Neonatology, University of South Florida College of Medicine, Tampa, FL 33612, USA.
The Journal of Nutrition
|May 16, 1998
Summary
Maternal fish oil-rich diets during pregnancy and lactation delayed neurodevelopment in rat pups, indicated by slower auditory startle reflexes and longer auditory brainstem conduction times. This suggests potential negative impacts on auditory pathway myelination.
Area of Science:
- Neuroscience
- Developmental Biology
- Nutritional Science
Background:
- Maternal diet composition significantly influences offspring neurodevelopment.
- Specific fatty acid profiles, such as omega-3 and omega-6, play critical roles in brain maturation.
- Understanding these effects is crucial for optimizing prenatal and postnatal nutrition recommendations.
Purpose of the Study:
- To investigate the impact of maternal dietary fatty acid composition (corn oil vs. fish oil) on neurodevelopmental outcomes in rat pups.
- To determine if maternal fish oil or corn oil supplementation affects the timing of reflex development and auditory pathway function.
- To analyze the fatty acid composition of maternal milk and pup cerebrums in relation to maternal diet.
Main Methods:
- Timed pregnant rats were fed diets supplemented with either corn oil or menhaden fish oil from gestation through lactation.
- Pups were cross-fostered and assessed daily for neurodevelopmental reflexes from postnatal day 4 to 30.
- Auditory brainstem conduction times were measured, and fatty acid analyses were performed on milk and pup cerebrums.
Main Results:
- Pup cerebrums and maternal milk reflected maternal dietary fatty acid intake, with higher (n-3) in fish oil groups and (n-6) in corn oil groups.
- A significant delay in the appearance of the auditory startle reflex was observed in pups from dams fed fish oil.
- Auditory brainstem conduction times were significantly longer in pups of fish oil-fed dams compared to corn oil-fed dams.
Conclusions:
- Maternal fish oil supplementation negatively impacted neurodevelopment in rat pups, specifically affecting auditory reflexes and brainstem conduction.
- The observed delays suggest that high maternal intake of fish oil may adversely affect the myelination of the auditory brainstem pathway.
- These findings highlight the importance of balanced maternal fatty acid intake for optimal offspring neurodevelopment.