β-Hydroxybutyrate in the Brain: One Molecule, Multiple Mechanisms.

Area of Science:

• Neuroscience
• Metabolic Biochemistry

Background:

• Beta-Hydroxybutyrate (βOHB) is a ketone body utilized as a brain fuel.
• While its role in healthy brain energy metabolism is minor, βOHB exhibits significant therapeutic potential due to its diverse effects.

Purpose of the Study:

• To explore the multifaceted roles of βOHB in the brain, including its production, metabolism, and signaling.
• To investigate the therapeutic potential of βOHB, focusing on strategies to increase its levels in the brain.

Main Methods:

• Review of βOHB's metabolic pathways in astrocytes and its mitochondrial utilization across brain cells.
• Analysis of βOHB's direct signaling interactions, including ion channel modulation and histone deacetylase inhibition.
• Examination of βOHB's anti-inflammatory effects via inflammasome interaction.

Main Results:

• βOHB serves as an efficient mitochondrial fuel, influencing redox couples and reducing reactive oxygen species.
• βOHB acts as a signaling molecule affecting ion channels and gene expression, with anti-inflammatory properties.
• Esterified forms of βOHB demonstrate potential for increasing plasma βOHB levels and brain entry.

Conclusions:

• Understanding βOHB's mechanisms is crucial for designing effective dietary and supplemental interventions for neurological conditions.
• Targeting βOHB levels offers a promising avenue for neurotherapeutics, with esterified forms showing significant potential.