Cells in device (IMAGE) Washington University School of Medicine Caption Researchers at Washington University School of Medicine in St. Louis and Cornell University have collaborated to implant insulin-secreting beta cells grown from human stem cells into mice with diabetes, to normalize their blood sugar. The cells pictured (in purple) are inside a tiny implant that is porous enough to allow these cells to secrete insulin -- yet small enough to prevent immune cells from accessing and destroying them. Credit Xi Wang Usage Restrictions None 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.