Recent research from Stanford Medicine has unveiled a compelling link between glucose metabolism and the brain’s ability to generate new neurons, a process known as neurogenesis. As we age, neurogenesis naturally declines, contributing to cognitive impairments and increasing the risk of neurodegenerative diseases such as Alzheimer’s and Parkinson’s. The study, led by Professor Anne Brunet, utilized advanced CRISPR technology to identify genes that, when inhibited, could reactivate dormant neural stem cells in aged mice. Among the 300 genes identified, the Slc2a4 gene, which encodes the glucose transporter protein GLUT4, was particularly noteworthy. Elevated glucose uptake via GLUT4 in older neural stem cells appeared to promote a dormant state, suggesting that reducing glucose influx might rejuvenate these cells.
To test this hypothesis, researchers employed an innovative in vivo technique, injecting genetic material to suppress the Slc2a4 gene directly into the brains of aged mice. The results were remarkable: there was a more than twofold increase in new neuron production in the olfactory bulbs of these mice. This surge in neurogenesis was accompanied by a rise in both inactive and active neural stem cells, indicating a revitalization of the stem cell population. These findings open potential avenues for therapeutic interventions targeting glucose metabolism to combat age-related cognitive decline. Moreover, they suggest that lifestyle modifications, such as adopting a low-carbohydrate diet, could modulate glucose levels and enhance brain health in aging populations. Click for More Details
