Drs. Sikder and Kodadek (IMAGE) UT Southwestern Medical Center Caption Drs. Devanjan Sikder (left) instructor of internal medicine at UT Southwestern Medical Center, and Thomas Kodadek, chief of translational research at UT Southwestern, have found that orexin, a hormone associated with sleep and hunger, activates a protein long known to stimulate tumor growth. Credit UT Southwestern 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.