What it is
Lifestyle-related type 2 diabetes and the obesity associated with it, together called diabesity, affect more than 2.5 billion people worldwide and impose nearly $3 trillion in health care costs each year. The authors developed an implantable, wirelessly powered electrocatalytic closed-loop health optimization (ECHO) device in which platinum-decorated gold nanoclusters embedded in graphite felt selectively oxidize blood glucose, to an electrically tunable degree, into gluconate, which the kidneys clear. In type 2 diabetic mice, wireless, low-power activation (0.75 volts, 10 milliamperes) restored glucose homeostasis within 1 hour, shifted metabolism from glucose to lipid utilization, reduced body weight and triglycerides, and raised circulating free fatty acids and ketone bodies, without detectable hypoglycemia or adverse physiological, inflammatory or behavioral effects during 6 weeks of treatment. Coupled to a commercial continuous glucose monitoring system, the device enabled autonomous, smartphone-controlled, drug-free closed-loop management of experimental diabesity.
Why it matters
In type 2 diabetic mice, an implant that oxidizes blood glucose into gluconate, which the kidneys clear, restored glucose homeostasis within 1 hour without any drug. Wirelessly powered at 0.75 volts and 10 milliamperes, it also shifted the mice's metabolism from glucose toward lipid use, lowered body weight and triglycerides, and the mice showed no detectable hypoglycemia or adverse physiological, inflammatory or behavioral effects over 6 weeks of treatment. Linked to a commercial continuous glucose monitor, it ran as an autonomous, smartphone-controlled, drug-free closed loop managing the mice's experimental diabesity; in people, type 2 diabetes and obesity affect more than 2.5 billion people, the authors note.
Underlined numbers link to their source. Every metric and quoted figure is listed under Sources and data below.
Filed underElectrochemical sensors and biosensors, Diabetes Management and Research, Pancreatic function and diabetes