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Related Experiment Video

Updated: Jun 16, 2026

Intravital Imaging of Intraepithelial Lymphocytes in Murine Small Intestine

Intravital Imaging of Intraepithelial Lymphocytes in Murine Small Intestine

Published on: June 24, 2019

Dynamic T cell migration program provides resident memory within intestinal epithelium.

David Masopust¹, Daniel Choo, Vaiva Vezys

¹Department of Microbiology, Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA. masopust@umn.edu

The Journal of Experimental Medicine

|February 17, 2010

Summary

This summary is machine-generated.

Activation in the spleen, not just local gut tissue, can prime T cells for intestinal homing. This explains how systemic immunizations induce gut immunity and highlights dynamic T cell migration patterns.

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In Vitro Resident Memory CD8 T Cell Differentiation Using Epithelial Organoid-T Cell Co-culture System

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Published on: February 3, 2026

Area of Science:

Immunology
Cellular Biology
Gastroenterology

Background:

Intestinal T cell homing was thought to depend solely on local activation within gastrointestinal lymphoid tissues.
This model conflicted with observations of intestinal T cell responses following non-gastrointestinal immunization routes.

Purpose of the Study:

To reconcile the discrepancy between local activation models and observed systemic induction of intestinal immunity.
To investigate the role of splenic activation in T cell homing to the intestinal mucosa.
To characterize the recirculation dynamics of memory T cells in the intestinal epithelium.

Main Methods:

Comparative analysis of T cell homing molecule expression after activation in different lymphoid tissues (gastrointestinal vs. spleen vs. skin-draining lymph nodes).
Tracking of memory T cell populations within the small intestine epithelium and other tissues.
Investigation of human T cell homing dynamics following subcutaneous yellow fever vaccination.

Main Results:

Splenic activation induces an intermediate level of intestinal homing potential in T cells.
Memory T cells in the small intestine epithelium do not consistently recirculate with those in other tissues.
T cell homing dynamics observed in the study are mirrored in human immune responses to yellow fever vaccination.

Conclusions:

Splenic activation contributes to the seeding of the intestine with T cells capable of homing to the intestinal mucosa.
The intestinal immune system is populated by memory T cell precursors shortly after systemic activation events.
T cell homing to the intestine is a dynamic process influenced by the site of initial immune activation.