Related Experiment Video
Updated: Sep 16, 2026

Isolation and Flow Cytometric Characterization of Murine Small Intestinal Lymphocytes
Published on: May 8, 2016
Intraepithelial lymphocytes of the intestinal mucosa: curiouser and curiouser
1Department of Cell Biology, Upjohn Company, Kalamazoo, MI 49001.
Intraepithelial lymphocytes (IEL) of the intestine are discussed in light of recent findings concerning their ontogeny and T cell receptor expression. IEL are distinct from other peripheral T cells in many aspects, including their homing abilities and their phenotypic characteristics. IEL that express the gamma/delta T cell receptor are singular in that the thymus is not required for their maturation or for the selection of certain T cell receptor variable regions. Despite recent efforts, the in vivo function of IEL with gamma/delta T cell receptors remains unclear. Overall, IEL and the associated mucosa represent a complex lymphoid organ that will be the object of much future experimentation.
Intraepithelial lymphocytes (IEL) of the intestine are discussed in light of recent findings concerning their ontogeny and T cell receptor expression. IEL are distinct from other peripheral T cells in many aspects, including their homing abilities and their phenotypic characteristics. IEL that express the gamma/delta T cell receptor are singular in that the thymus is not required for their maturation or for the selection of certain T cell receptor variable regions. Despite recent efforts, the in vivo function of IEL with gamma/delta T cell receptors remains unclear. Overall, IEL and the associated mucosa represent a complex lymphoid organ that will be the object of much future experimentation.
Related Concept Videos
Renewal of Intestinal Stem Cells
Epithelial Tissues and Their Functions
Epithelial tissues provide the body's first line of protection from physical, chemical, and...
Lymphoid Cells and Tissues
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
Secondary Lymphoid Organs
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
Histology of the Small Intestine
The intestinal lining features transverse folds called circular folds, each housing fingerlike projections known as intestinal villi. These villi are covered by a layer of simple columnar epithelium, also referred to as...
Histology of the Large Intestine
The innermost mucosa layer comprises simple columnar epithelium, lamina propria, and muscularis mucosae. This layer is primarily populated with absorptive cells, tasked with water absorption, and goblet cells, responsible for secreting mucus to...

