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Analysis of the Brain Transcriptome, Microbiome and Metabolome in Ketogenic Diet and Experimental Stroke

Anastasia A Zharikova,Nadezda V Andrianova,Denis N Silachev, Vladimir O Nebogatikov,Irina B Pevzner, Ciara I Makievskaya,Ljubava D Zorova, Grigoriy V Maleev,Galina V Baydakova,Dmitry V Chistyakov, Sergey V Goriainov, Marina G Sergeeva,Inna Y Burakova,Artem P Gureev,Vasily A Popkov,Aleksey A Ustyugov, Egor Y Plotnikov

Brain, behavior, and immunity(2024)

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Abstract
The ketogenic diet (KD) has been shown to be effective in treating various brain pathologies. In this study, we conducted detailed transcriptomic and metabolomic profiling of rat brains after KD and ischemic stroke in order to investigate the effects of KD and its underlying mechanisms. We evaluated the effect of a two-month KD on gene expression in intact brain tissue and after middle cerebral artery occlusion (MCAO). We analyzed the effects of KD on gut microbiome composition and blood metabolic profile as well as investigated the correlation between severity of neurological deficits and KD-induced changes. We found transcriptional reprogramming in the brain after stroke and KD treatment. The KD altered the expression of genes involved in the regulation of glucose and fatty acid metabolism, mitochondrial function, the immune response, Wnt-associated signaling, stem cell development, and neurotransmission, both in intact rats and after MCAO. The KD led to a significant change in the composition of gut microbiome and the levels of amino acids, acylcarnitines, polyunsaturated fatty acids, and oxylipins in the blood. However, the KD slightly worsened the neurological functions after MCAO, so that the therapeutic effect of the diet remained unproven.
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