This extended description was generated by ChatGPT and reviewed by the CellGuide team, who added references, and by the CL editors, who approved it for inclusion in CL. It may contain information that applies to only to some subtypes and species, and so should not be considered definitional. Type EC enteroendocrine cells, also known as enterochromaffin cells, are a vital hormone-secreting cell type found in the gastrointestinal tract. These cells are named after their location in the intestines (“entero”) and because they are stainable by chromium salts (“chromaffin”). The primary function of type EC enteroendocrine cells is to act as chemosensors and lies in their capacity to produce and secrete serotonin, also known as 5-hydroxytryptamine (5-HT). Serotonin is a neurotransmitter that plays a significant role in modulating motility, secretion, vasodilation, perception of pain, and appetite in the gastrointestinal system. However, its function is not limited to the gastrointestinal tract; once secreted, serotonin is distributed via the bloodstream and contributes to regulating mood, appetite, and sleep in the brain. Via specific chemosensory receptors type EC enteroendocrine cells are able to respond to various environmental, metabolic, and homeostatic stimuli and transduce information from the gut to the nervous system: Food intake, particularly the ingestion of fats and carbohydrates, prompts these cells to produce and release serotonin; the mechanical stimulus of food in the lumen can also trigger release. The distribution, function, and responsiveness of type EC cells reveal them as a crucial link between the intestinal environment, the nervous system, and the regulation of numerous bodily functions.

MESH:D004759

FMA:62934

FMA:83132

A subtype of enteroendocrine cells found in the gastrointestinal mucosa, particularly in the glands of pyloric antrum; duodenum; and ileum. These cell type secretes serotonin and some neurotransmitters including enkephalins and substance P. Their secretory granules stain readily with silver (argentaffin stain).

enterochromaffin cell

Kulchitsky cell

argentaffin cell

type EC enteroendocrine cell

CL:0000577

type EC enteroendocrine cell