Mouse with an Itch (IMAGE) Buck Institute for Research on Aging Caption This mouse was involved in the study which identified serotonin receptor HTR7 as a key mediator of chronic itch. Credit Courtesy of Diana Bautista, UC Berkeley 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.