Open Wide (IMAGE) Rockefeller University Caption The TRPV1 ion channel coupled with ferritin (green) was targeted to glucose-sensing neurons (red). Ferritin allows the ion channel to open in response to magnetic forces, activating or inhibiting the neurons. Changing the activity of glucose-sensing neurons had downstream effects on blood glucose metabolism. Credit Laboratory of Molecular Genetics at The Rockefeller University/Nature Usage Restrictions Image may be used only to illustrate the research described in the accompanying release. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.