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Related Concept Videos

T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...

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Related Experiment Video

Updated: May 12, 2026

Isolation and Ex Vivo Culture of Vδ1+CD4+γδ T Cells, an Extrathymic αβT-cell Progenitor
10:33

Isolation and Ex Vivo Culture of Vδ1+CD4+γδ T Cells, an Extrathymic αβT-cell Progenitor

Published on: December 7, 2015

Gammadelta T cells: innately adaptive immune cells?

Leonardo M R Ferreira1

  • 1Department of Molecular and Cellular Biology and Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA. leonardoferreira@fas.harvard.edu

International Reviews of Immunology
|April 27, 2013
PubMed
Summary

Gamma delta T cell receptors (γδ TCRs) recognize diverse ligands, expanding T cell immunity beyond traditional alpha beta T cells. This review explores their history, function, and recent advancements in mouse and human immunology.

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Last Updated: May 12, 2026

Isolation and Ex Vivo Culture of Vδ1+CD4+γδ T Cells, an Extrathymic αβT-cell Progenitor
10:33

Isolation and Ex Vivo Culture of Vδ1+CD4+γδ T Cells, an Extrathymic αβT-cell Progenitor

Published on: December 7, 2015

Development and Functional Characterization of Murine Tolerogenic Dendritic Cells
09:51

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Published on: May 18, 2018

Expansion and Enrichment of Gamma-Delta (γδ) T Cells from Apheresed Human Product
11:51

Expansion and Enrichment of Gamma-Delta (γδ) T Cells from Apheresed Human Product

Published on: September 22, 2021

Area of Science:

  • Immunology
  • Cell Biology
  • T cell receptor research

Background:

  • T cells are crucial for adaptive immunity, utilizing T cell receptors (TCRs) to recognize antigens presented by MHC molecules.
  • Most T cells express TCRs composed of alpha (α) and beta (β) chains.
  • A distinct subset of T cells expresses gamma delta (γδ) TCRs, mediating unique immune recognition pathways.

Purpose of the Study:

  • To provide historical context on the discovery and evolution of γδ T cells.
  • To elucidate the diverse functions and ligand specificities of γδ T cells in both mouse and human systems.
  • To critically review recent developments and ongoing research concerning these enigmatic immune cells.

Main Methods:

  • Literature review synthesizing historical data and functional studies of γδ T cells.
  • Analysis of diverse ligand recognition profiles, including bacterial phosphoantigens, nonclassical MHC-I, and unprocessed proteins.
  • Comparative discussion of γδ T cell characteristics in murine and human models.

Main Results:

  • γδ TCRs recognize a broad spectrum of ligands, significantly broadening the scope of T cell-mediated immune responses.
  • These ligands include microbial products and self-antigens not typically presented to αβ T cells.
  • γδ T cells play roles in innate-like immunity and tissue surveillance, distinct from conventional T cells.

Conclusions:

  • γδ T cells represent a unique and versatile arm of the immune system with broad recognition capabilities.
  • Their distinct ligand specificities and functions offer novel avenues for therapeutic intervention and understanding immune responses.
  • Further research is essential to fully unravel the complexities and potential of γδ T cells in health and disease.