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Neural Regen Res. 2018 Dec;13(12):2060-2063. doi: 10.4103/1673-5374.241442.

Ketogenic diet versus ketoacidosis: what determines the influence of ketone bodies on neurons?

Author information

1
Institute of Biophysics and Cell Engineering, Minsk, Belarus.
2
Department of Pharmacology, University of Oxford, Oxford, UK.

Abstract

Glucose is the main energy substrate for neurons, however, at certain conditions, e.g. in starvation, these cells could also use ketone bodies. This approach is used in clinical conditions as the ketogenic diet. The ketogenic diet is actually a biochemical model of fasting. It includes replacing carbohydrates by fats in daily meal. Synthesis of ketone bodies β-hydroxubutirate, acetoacetate and acetone begins once glycogen stores have depleted in the liver. The ketogenic diet can be used to treat clinical conditions, primarily epilepsy. The mechanism of neuroprotective action of ketogenic diet is not very clear. It is shown that ketone bodies influence neurons at three different levels, namely, metabolic, signaling and epigenetic levels. Ketone bodies are not always neuroprotective. Sometimes they can be toxic for the brain. Ketoacidosis which is a very dangerous complication of diabetes mellitus or alcoholism can be taken as an example. The exact mechanism of how neuroprotective properties of ketone bodies reverse to neurotoxic is yet to be established.

KEYWORDS:

acidosis; alcoholism; diabetes mellitus; epigenetics; epilepsy; hydroxyl-carboxylic acid receptor; metabolism; β-hydroxybutirate

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