3-Hydroxybutyrate regulates energy metabolism and induces BDNF expression in cerebral cortical neurons.
Level 5 - mechanism / opinion, no new human data
In vitro bench research using cultured cortical neurons without human subjects.
PubMed 27739595 · doi:10.1111/jnc.13868
What was done
Researchers investigated the metabolic and transcriptional effects of the ketone 3-hydroxybutyrate (3OHB) on cultured cerebral cortical neurons. They evaluated changes in mitochondrial respiration, oxygen consumption, ATP production, NAD+/NADH ratio, and the signaling pathway regulating brain-derived neurotrophic factor (Bdnf) expression, specifically examining reactive oxygen species, NF-κB activation, and p300/EP300 histone acetyltransferase activity.
What was found
The abstract reports no numerical values or statistical metrics. It reports that 3OHB exposure increased neuronal oxygen consumption, ATP production, NAD+/NADH ratio, and mitochondrial respiration, which subsequently drove Bdnf gene expression via reactive oxygen species generation, NF-κB activation, and p300/EP300 histone acetyltransferase activity.
Why it matters
This work identifies a specific cellular signaling cascade through which ketone metabolism may promote BDNF expression and neuroprotective adaptations during fasting, exercise, or ketogenic diet regimens.
Limits
The study is entirely in vitro in cultured cortical neurons, lacking in vivo verification and whole-organism physiological context. Sample sizes, ketone concentrations, statistical significance levels, and effect magnitudes are not provided in the abstract.
Cited by
- supports Mark Mattson's research showed that benefits of intermittent fasting are associated with beta-hydroxybutyrate-induced increases in brain-derived neurotrophic factor (BDNF).