Activating Specific Hypothalamus Neurons May Increase Insulin Sensitivity in Body Tissues

Activation of SF1 neurons via DREADD technology reduced food intake and increased energy expenditure in mice.

• Optogenetic stimulation of VMH neurons that express steroidogenic factor 1 (SF1) is associated with hyperglycemia.
• Leptin acting through the VMH stimulates glucose utilization and insulin sensitivity in certain peripheral tissues.
• Activation of SF1 neurons increased whole-body glucose utilization and glucose uptake in skeletal muscle, heart, and brown adipose tissue.
• This activation also enhanced glucose production and glycogen breakdown in the liver, helping to maintain blood glucose levels.
• During hyperinsulinemic-euglycemic clamp studies, SF1 neuron activation improved insulin-induced glucose uptake and tended to suppress glucose production.
• DREADD technology may serve as a valuable tool for exploring the brain's role in regulating insulin sensitivity.

Simplified