Endocrine Cells (IMAGE) University of California - San Diego Caption Endocrine cells develop in human islet-like structures following transplantation in an animal model. These cells produce insulin in response to glucose, effectively replacing the insulin that is lost in people with Type 1 diabetes. Insulin is depicted in blue; somatostatin in red, glucagon in green. The stem cell-based therapy has entered human Phase I clinical trials. Credit Kuniko Kadoya, Viacyte, Inc. and CIRM Usage Restrictions Must use image credit as indicated above. 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.