Omega-3 Fatty Acids and Vitamin D Decrease Plasma T-Tau, GFAP, and UCH-L1 in Experimental Traumatic Brain Injury.

Area of Science:

• Neuroscience
• Biochemistry
• Sports Medicine

Background:

• Traumatic brain injury (TBI) causes neuronal damage, necessitating interventions targeting neuroinflammation.
• Exercise and anti-inflammatory diets (omega-3 fatty acids, vitamin D) show promise for TBI recovery.
• Understanding their combined effects on TBI biomarkers and behavior is crucial.

Purpose of the Study:

• To investigate the impact of an anti-inflammatory diet (AIDM) on plasma TBI biomarkers and behavior in rats post-mild TBI (mTBI).
• To assess the effects of voluntary exercise on mTBI outcomes.
• To determine if dietary supplementation influences TBI biomarker levels and cognitive function.

Main Methods:

• Adult male rats were subjected to mTBI using a modified weight drop method.
• Rats were fed either an anti-inflammatory diet (AIDM) or a control diet (CON) for 30 days post-injury.
• Plasma TBI biomarkers (T-tau, GFAP, UCH-L1, NF-L), voluntary exercise, and behavior were monitored.

Main Results:

• NF-L levels elevated acutely post-mTBI, while T-tau, GFAP, and UCH-L1 increased at 30 days in CON-fed rats, but not AIDM-fed rats.
• AIDM diet increased docosahexaenoic acid and vitamin D levels.
• Voluntary exercise mitigated mTBI-induced cognitive deficits, independent of plasma biomarker changes.

Conclusions:

• An anti-inflammatory diet significantly alters TBI biomarker profiles, potentially mitigating chronic inflammation.
• Voluntary exercise protects against cognitive deficits following mTBI.
• Combining exercise with an anti-inflammatory diet may enhance recovery from mTBI.