Epsilon cell Epsilon cell Epsilon cells (ε-cells) are endocrine cells found in the Islets of Langerhans and produce the hormone ghrelin. They were discovered in mice. In human fetal pancreases, single epsilon cells scattered in primitive exocrine tissue were observed to start aggregating into clusters after gestational week 13. From gestational week 21, epsilon cells were observed around developing islets, forming an almost continuous layer at the rim of the islets. In adult pancreas samples, they remained localized on the mantle of the islets in different amounts. Production of ghrelin with insulin, glucagon, or somatostatin was not detected during development. Co-production with
Ryan Langerhans On April 7, Langerhans was designated for assignment to make room for Jesús Colomé. On December 14, 2010, the Mariners again re-signed Langerhans to a minor league contract. On May 9, 2011, Langerhans was again designated for assignment to make room for Mike Wilson. On July 29, 2011, Langerhans was traded to the Arizona Diamondbacks for cash considerations. Langerhans signed a minor league contract with the Los Angeles Angels of Anaheim on December 23, 2011. Ryan was recalled by the Angels on May 14, 2012, when Torii Hunter was placed on the restricted list. On May 20, Langerhans was removed