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The effects of prenatal and early postnatal tocotrienol-rich fraction supplementation on cognitive function
Insights
Prenatal and postnatal supplementation with Tocotrienol-Rich Fraction (TRF) significantly enhanced cognitive function in male offspring rats. This neuroprotective strategy boosted brain tocotrienol levels, leading to improved learning and memory performance.
Area of Science:
- Neuroscience
- Nutritional Science
- Developmental Biology
Background:
- Early life nutrition critically impacts cognitive and behavioral development.
- Antioxidants, like vitamin E, protect the developing brain from oxidative stress.
- Tocotrienols, potent antioxidants, show promise for neuroprotection.
Purpose of the Study:
- To investigate the effects of prenatal and early postnatal Tocotrienol-Rich Fraction (TRF) supplementation on cognitive development in male offspring rats.
- To assess the influence of TRF on brain and plasma tocotrienol levels.
- To evaluate cognitive function using the Morris water maze.
Main Methods:
- Adult female Sprague Dawley rats were fed diets with or without TRF and/or DHA for 2 weeks prior to mating and throughout gestation and lactation.
- Male offspring (F1 generation) were raised by supplemented dams and then fed the same diets for 8 weeks post-weaning.
- Cognitive function was assessed using the Morris water maze in 8-week-old male offspring.
Main Results:
- Prenatal and postnatal TRF supplementation led to a 4-6 fold increase in brain and a 0.8 fold increase in plasma α-tocotrienol levels in male offspring.
- Male offspring exposed to TRF demonstrated significantly improved cognitive performance in the Morris water maze test.
Conclusions:
- Prenatal and postnatal TRF supplementation effectively improves cognitive function development in male progeny.
- Tocotrienol-Rich Fraction shows potential as a neuroprotective agent during critical developmental periods.
- This study highlights the importance of maternal and early-life nutrition for long-term cognitive health.
Background:
Recent findings suggest that the intake of specific nutrients during the critical period in early life influence cognitive and behavioural development profoundly. Antioxidants such as vitamin E have been postulated to be pivotal in this process, as vitamin E is able to protect the growing brain from oxidative stress. Currently tocotrienols are gaining much attention due to their potent antioxidant and neuroprotective properties. It is thus compelling to look at the effects of prenatal and early postnatal tocotrienols supplementation, on cognition and behavioural development among offsprings of individual supplemented with tocotrienols. Therefore, this study is aimed to investigate potential prenatal and early postnatal influence of Tocotrienol-Rich Fraction (TRF) supplementation on cognitive function development in male offspring rats. Eight-week-old adult female Sprague Dawley (SD) rats were randomly assigned into five groups of two animals each. The animals were fed either with the base diet as control (CTRL), base diet plus vehicle (VHCL), base diet plus docosahexanoic acid (DHA), base diet plus Tocotrienol-Rich fraction (TRF), and base diet plus both docosahexaenoic acid, and tocotrienol rich fraction (DTRF) diets for 2 weeks prior to mating. The females (F0 generation) were maintained on their respective treatment diets throughout the gestation and lactation periods. Pups (F1 generation) derived from these dams were raised with their dams from birth till four weeks post natal. The male pups were weaned at 8 weeks postnatal, after which they were grouped into five groups of 10 animals each, and fed with the same diets as their dams for another eight weeks. Learning and behavioural experiments were conducted only in male off-spring rats using the Morris water maze. Eight-week-old adult female Sprague Dawley (SD) rats were randomly assigned into five groups of two animals each. The animals were fed either with the base diet as control (CTRL), base diet plus vehicle (VHCL), base diet plus docosahexanoic acid (DHA), base diet plus Tocotrienol-Rich fraction (TRF), and base diet plus both docosahexaenoic acid, and tocotrienol rich fraction (DTRF) diets for 2 weeks prior to mating. The females (F0 generation) were maintained on their respective treatment diets throughout the gestation and lactation periods. Pups (F1 generation) derived from these dams were raised with their dams from birth till four weeks post natal. The male pups were weaned at 8 weeks postnatal, after which they were grouped into five groups of 10 animals each, and fed with the same diets as their dams for another eight weeks. Learning and behavioural experiments were conducted only in male off-spring rats using the Morris water maze.
Results:
Results showed that prenatal and postnatal TRF supplementation increased the brain (4-6 fold increase) and plasma α-tocotrienol (0.8 fold increase) levels in male off-springs. There is also notably better cognitive performance based on the Morris water maze test among these male off-springs.
Conclusion:
Based on these results, it is concluded that prenatal and postnatal TRF supplementation improved cognitive function development in male progeny rats.
