To investigate the specific cellular and molecular changes in response to dietary supplementation with medium-chain triglycerides (MCT) versus a ketogenic diet in Alzheimer’s disease mouse models.
Key Findings:
MCT supplementation and ketogenic diet improved hippocampal-dependent spatial learning and memory.
MCT increased dendritic spine density of hippocampal neurons and modulated gene expression related to mitochondrial functions and insulin signaling.
MCT did not elevate circulating ketones, unlike the ketogenic diet, indicating distinct metabolic pathways.
MCT enhanced peripheral insulin response, while the ketogenic diet increased hyperglycemia and body weight gain.
Both diets partially reversed liver metabolic abnormalities but through distinct mechanisms.
Interpretation:
MCT supplementation improves cognitive function and systemic metabolism in Alzheimer’s disease without increasing circulating ketone levels, suggesting alternative mechanisms of action compared to ketogenic diets, which may have significant implications for future human studies.
Limitations:
Study conducted in mouse models, which may not fully replicate human Alzheimer’s disease.
Further research needed to clarify the long-term effects and mechanisms of MCT supplementation in diverse human populations.
Conclusion:
MCT supplementation presents a promising dietary intervention for enhancing cognitive function and metabolic health in Alzheimer’s disease models, warranting further investigation in human studies.
by Paule E H M’Bra, Laura K Hamilton, Gaël Moquin-Beaudry, Chenicka L Mangahas, Federico Pratesi, Anne Castonguay, Sophia Mailloux, Manon Galoppin, Jessica Avila Lopez, Megan Bernier, Marta Turri, Marian Mayhue, Anne Aumont, Martine Tetreault, Stephen C Cunnane, Karl J L Fernandes
