Researchers affiliated with the Medical University of South Carolina have reached the conclusion that fish oil supplements might have a negative impact on brain recovery subsequent to traumatic brain injuries. The findings of their study have been featured in the journal Cell Reports.
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During the investigation, the specialists examined how omega-3 fatty acids affect the state of the neurovascular system. Particular focus was placed on eicosapentaenoic acid (EPA), which is a component of fish oil. According to the scientists, it is precisely this substance that possesses metabolic characteristics capable of hindering tissue restoration processes.
The investigators observe that, in contrast to docosahexaenoic acid (DHA), which participates in the formation of cellular membranes, EPA integrates less effectively into brain structures. This disparity could manifest in the ability of blood vessels to regenerate following damage.
To validate these conclusions, experiments were conducted using laboratory mice. Animals that had been receiving fish oil supplements for an extended period were subjected to repeated mild head injuries. Consequently, these subjects exhibited a decline in cognitive functions, including a reduced capacity for spatial learning. Furthermore, an accumulation of tau protein—a component linked to the progression of neurodegenerative disorders—was detected in the cerebral cortex.
Supplemental analysis was carried out on cultured cells derived from human brain microvessels, which corroborated the outcomes observed in the animal trials. The scientists also scrutinized post-mortem tissue samples from patients diagnosed with chronic traumatic encephalopathy, identifying evidence of disrupted lipid metabolism and functional metabolic processes.
The authors of the paper concluded that eicosapentaenoic acid may influence the operation of genes responsible for the resilience of the vascular network. In the compromised tissues, a decrease in the activity of genes associated with the construction of the extracellular matrix was noted. It is emphasized, however, that the acid itself is not inherently toxic, but under specific circumstances, particularly during the post-injury recovery phase, it has the potential to alter cellular responses to stress.
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