Related Experiment Video
Updated: Aug 9, 2026

Experimental Infection with Listeria monocytogenes as a Model for Studying Host Interferon-γ Responses
Published on: November 16, 2016
Unidirectional development of CD8+ central memory T cells into protective Listeria-specific effector memory T cells
Katharina M Huster1, Martina Koffler, Christian Stemberger
1Clinical Cooperation Group 'Antigen-Specific Immunotherapy', GSF - National Research Center of Environment and Health and Technical University Munich, Germany.
Antigen-experienced CD8(+) T cells develop hierarchically, with effector memory T cells (T(EM)) providing the best protection against Listeria monocytogenes infection. Understanding these T cell subsets is crucial for designing effective T cell-based vaccines.
Area of Science:
- Immunology
- Cellular Biology
- Vaccinology
Background:
- CD8(+) T cells are crucial for adaptive immunity.
- Three subsets exist: short-living effector T cells (T(EC)) and long-living central (T(CM)) and effector memory (T(EM)) T cells.
- Their lineage relationships and protective roles remain unclear.
Purpose of the Study:
- To elucidate the developmental hierarchy of CD8(+) T cell subsets.
- To determine the protective capacity of each subset against Listeria monocytogenes (L.m.).
- To inform the design of improved T cell-based vaccines.
Main Methods:
- Utilized a novel marker combination (CD127 and CD62L) to identify mouse CD8(+) T cell subsets.
- Performed in vitro and in vivo stimulation assays to analyze lineage relationships.
- Assessed protective immunity in vivo using different priming protocols.
Main Results:
- Demonstrated a unidirectional hierarchy: T(CM) can differentiate into T(EM) or T(EC), while T(EM) only progresses to T(EC).
- Short-living T(EC) cells do not revert to memory phenotypes.
- T(EM) predominance, induced by CD40 stimulation, correlated with the best protection against L.m.
Conclusions:
- Established a hierarchical developmental pathway for CD8(+) T cells.
- Highlighted the superior protective role of effector memory T cells (T(EM)).
- Findings suggest strategies for vaccine development to prioritize T(EM) generation for enhanced immunity.
More Related Videos
Related Concept Videos
Immunological Memory
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature is...
Cells of the Adaptive Immune Response
Vaccines
T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
Immune Response Against Viral Pathogens
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
T Cell Types and Functions
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...

