Neurons are actually team players; they build and ship spare parts to their neighbors to help fix the brain's 'wiring.'
March 23, 2026
Original Paper
Cell-specific isotope labeling identifies myo-inositol transfer between neurons and oligodendroglia to support myelin repair
bioRxiv · 10.64898/2026.03.19.712965
AI-generated illustration
The Takeaway
While support cells (glia) are usually thought to nourish neurons, this study reveals the reverse: neurons synthesize a sugar-like metabolite called myo-inositol and transfer it to the cells that form myelin. This surprising 'reverse' nutrient flow is critical for the brain to successfully regrow its protective insulation after injury.
From the abstract
Neurons and glial cells are biochemically coupled through the exchange of nutrients, but our knowledge of which metabolites are transferred between them remains limited due to technical challenges. Here, we introduce a strategy to label specific cell types with isotopic tracers so that metabolite transfer can be measured directly in the intact brain. By engineering neurons in mice to metabolize 13C-labeled cellobiose, a glucose dimer that wild-type cells cannot catabolize, we selectively track n