It May Take Guts to Cure Diabetes (IMAGE) Columbia University Irving Medical Center Caption Human gastrointestinal cells from patients were engineered to express insulin (fluorescent green) in the lab. Credit Columbia University Medical Center 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.