Type 2 diabetes is rising worldwide, linked to obesity and long-term energy surplus. Insulin lowers blood sugar by pushing glucose into cells, but if that energy isn’t used, it gets stored as fat — so patients often keep gaining weight.
The new approach:
Instead of using drugs or engineered biological cells, researchers developed a fully inorganic, implantable electronic system. It was published in the journal Science.
How it works:
- The catalyst: Graphite felt covered with gold nanoclusters that are “dusted” with even smaller platinum particles. The surface looks like tiny desert roses under an electron microscope. It needs no cells, enzymes, or biological components, which could make manufacturing and regulatory approval easier. It showed good biocompatibility.
- What it does: Using a very low electrical voltage, it converts excess blood glucose into gluconate, which cannot be stored as fat and is excreted in urine.
- Closed-loop control: A standard continuous glucose sensor (like those worn on the arm) monitors glucose. If levels rise too high after a meal, it sends a Bluetooth signal to a smartphone/smartwatch, which wirelessly powers the implant at 13.56 MHz and activates the catalyst. It switches off automatically when glucose returns to target, reducing risk of low blood sugar.
- The implant: Contains the catalyst plus an electronic control unit in a 3D-printed casing, powered wirelessly.
What they tested:
- In a lab reservoir with 5 litres of glucose solution — about the volume of human blood — it successfully converted glucose.
- In diabetic mice for 6 weeks: blood sugar was precisely regulated, mice lost weight, and there was no evidence of tissue damage from electrical or heat effects.
What’s next:
No human testing yet. The team sees this as a paradigm shift from telling the body how to handle glucose (with drugs) to directly removing excess glucose with electronics. Because the components — sensors, wireless power, control electronics — already exist commercially, they plan to develop it into a medical device.