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Immediate and Delayed Effects of Food Restriction on Some Parameters of Brain Development in Rats
B Ya Ryzhavskii1, O A Lebed'ko2,3, O V Lazinskaya2
1Department of Histology, Embryology, and Cytology, Far-Eastern State Medical University, Khabarovsk, Russia. 19151943@rambler.ru.
Bulletin of Experimental Biology and Medicine
|June 10, 2019
Summary
Dietary restriction in young rats impacts brain development, causing immediate weight changes and lasting alterations in brain structure and function, alongside oxidative stress.
Area of Science:
- Neuroscience
- Developmental Biology
- Nutritional Science
Background:
- Early-life nutrition significantly influences brain development.
- Understanding the long-term effects of dietary restriction is crucial for developmental neuroscience.
Purpose of the Study:
- To investigate the immediate and delayed effects of a 15-day dietary restriction on rat brain development.
- To assess changes in brain weight, cortical thickness, neuronal density, and molecular markers.
Main Methods:
- Rats aged 1 to 1.5 months were subjected to a 15-day dietary restriction.
- Evaluated immediate effects and effects 15 days after returning to normal feeding.
- Measured absolute and relative brain weights, cortical thickness, neuronal density, nuclear/nucleolar size, and RNA concentration.
- Assessed oxidative stress markers.
Main Results:
- Immediate effects: decreased absolute brain/hemisphere weights, increased relative brain weight, and reduced parietal cortex thickness.
- Delayed effects: persistent lower absolute brain weights and higher relative brain weights.
- No significant changes in cortical thickness or neuronal density in specific layers post-recovery.
- Increased neuronal nuclear and nucleolar size, particularly in anterior parietal layer V, indicating cellular stress.
- Brain parameter changes correlated with the development of oxidative stress.
Conclusions:
- Dietary restriction during a critical developmental window induces lasting changes in brain growth and structure.
- These alterations are associated with cellular stress and oxidative damage.
- Further research is needed to understand the full implications of early-life nutritional insults on brain plasticity and function.
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