Overview
- The peer‑reviewed findings, published in Molecular Metabolism, show that a defined VMH neuron population maintains glucose under routine, non‑stress conditions.
- Chronic silencing of VMHCckbr neurons in mice disrupted glucose stability during the early sleep fasting window, whereas acute activation raised circulating glycerol.
- The neurons support hepatic gluconeogenesis by mobilizing glycerol through a β3‑adrenergic receptor–dependent pathway without depleting liver glycogen or boosting gluconeogenic gene expression.
- Investigators suggest these cells may be overactive in prediabetes, potentially driving nocturnal lipolysis and elevated glucose, though this link remains unconfirmed in humans.
- The team plans to map additional ventromedial hypothalamic circuits and investigate how brain pathways coordinate with the liver and pancreas to regulate blood sugar.