Immunohistochemical identification of peptide hormones in the endocrine cells of the gastrointestinal tract of the Oreochromis niloticus

Abstract

The endocrine cells of gastrointestinal tract of the Oreochromis niloticus were investigated using immunohistochemical techniques. 8 antisera were tested and 3 immunoreactivities were detected: Serotonin, glucagon and somatostatin immunoreactive cells. Substance P, insulin, gastrin, calcitonin gene related peptide (CGRP) and calbindin immunoreactive cells were not found.