Baylor Scientists Find Metformin Lowers Glucose via Brain RAP1 Pathway at Tiny Doses
Updated
Updated · Daily Kos · Jul 26
Baylor Scientists Find Metformin Lowers Glucose via Brain RAP1 Pathway at Tiny Doses
3 articles · Updated · Daily Kos · Jul 26
Summary
Baylor researchers found metformin lowers blood glucose by acting directly in the brain, not just in the liver and gut, by suppressing the RAP1 protein.
In the ventromedial hypothalamus, that RAP1 shutdown activates SF1 neurons that help drive glucose down, revealing a previously hidden control center for blood sugar.
Tiny brain doses cut glucose in diabetic mice—reported as thousands of times lower than oral dosing—suggesting the pathway could be targeted more precisely than standard treatment.
The finding, published in Science Advances, reframes how the decades-old diabetes drug works and could guide new therapies that tap the same brain circuit.