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Related Concept Videos

T Cell Types and Functions01:24

T Cell Types and Functions

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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...
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T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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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...
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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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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...
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Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

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Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
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Immunological Memory01:23

Immunological Memory

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Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
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...
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Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

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Overview
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Related Experiment Video

Updated: Apr 17, 2026

Isolation of CD4+ T-cells and Analysis of Circulating T-follicular Helper cTfh Cell Subsets from Peripheral Blood Using 6-color Flow Cytometry
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Isolation of CD4+ T-cells and Analysis of Circulating T-follicular Helper cTfh Cell Subsets from Peripheral Blood Using 6-color Flow Cytometry

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Memory T follicular helper CD4 T cells.

J Scott Hale1, Rafi Ahmed1

  • 1Department of Microbiology and Immunology, Emory Vaccine Center, Emory University School of Medicine , Atlanta, GA , USA.

Frontiers in Immunology
|February 21, 2015
PubMed
Summary

Memory T follicular helper (Tfh) cells retain their specialized functions, crucial for robust antibody responses and effective vaccination strategies. These Tfh-committed cells are key for long-lived humoral immunity.

Keywords:
Bcl6CXCR5T follicular helper cellshelper T cellsmemory T cells

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Evaluation of T Follicular Helper Cells and Germinal Center Response During Influenza A Virus Infection in Mice
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Evaluation of T Follicular Helper Cells and Germinal Center Response During Influenza A Virus Infection in Mice

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Area of Science:

  • Immunology
  • Cellular Biology
  • Vaccinology

Background:

  • T follicular helper (Tfh) cells are essential CD4 T cells for germinal center reactions and humoral immunity.
  • Tfh cells express CXCR5 and Bcl6, migrating to follicles to aid B cell responses.
  • The memory phase commitment of Tfh cells was previously unclear.

Purpose of the Study:

  • To review recent studies on Tfh-committed CD4 T cells in the memory phase.
  • To discuss the implications of memory Tfh cells for immune recall and vaccination.
  • To explore markers, generation, maintenance, and plasticity of memory Tfh cells.

Main Methods:

  • Review of recent scientific literature on Tfh cell memory.
  • Analysis of studies investigating Tfh cell commitment and function.
  • Discussion of immunological markers and lineage dynamics.

Main Results:

  • Recent studies support the existence of Tfh-committed CD4 T cells at the memory stage.
  • Memory Tfh cells retain effector functions, aiding B cell responses upon reactivation.
  • These findings have implications for prime-boost vaccination and infection recall.

Conclusions:

  • Memory Tfh cells are crucial for sustained humoral immunity and effective vaccination.
  • Understanding memory Tfh cell stability and plasticity can optimize immunotherapeutic strategies.
  • Further research will refine the use of CD4 T cell memory in modulating antibody responses.