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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...
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...
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...
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...
Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

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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Related Experiment Video

Updated: Jul 11, 2026

Murine Superficial Lymph Node Surgery
04:36

Murine Superficial Lymph Node Surgery

Published on: May 21, 2012

Discriminating between different pathways of memory CD8+ T cell differentiation.

Vitaly V Ganusov1

  • 1Theoretical Biology, Utrecht University, Utrecht, The Netherlands. v.v.ganusov@uu.nl

Journal of Immunology (Baltimore, Md. : 1950)
|October 4, 2007
PubMed
Summary

Investigating CD8(+) T cell differentiation models during viral infections revealed that stem cell and progressive differentiation models do not fit experimental data. Further studies are needed to clarify T cell memory formation pathways.

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Mouse Na&#239;ve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
07:12

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

Published on: April 16, 2015

Area of Science:

  • Immunology
  • Computational Biology
  • Virology

Background:

  • CD8(+) T cell differentiation into memory cells during immune responses is not fully understood.
  • Three models exist: stem cell-associated, linear, and progressive differentiation.

Purpose of the Study:

  • To test the validity of mathematical models for CD8(+) T cell differentiation against experimental data.
  • To investigate T cell dynamics during acute lymphocytic choriomeningitis virus infection in mice.

Main Methods:

  • Mathematical modeling of proposed differentiation pathways.
  • Analysis of quantitative data on CD8(+) T cell dynamics during viral infection.

Main Results:

  • The stem cell-associated and progressive differentiation models failed to accurately describe the observed CD8(+) T cell dynamics.
  • These models, particularly those linking differentiation to cell division, were inconsistent with data at reasonable parameter values.

Conclusions:

  • The study suggests limitations in current models of CD8(+) T cell differentiation.
  • Additional experimental research is required to differentiate between proposed T cell memory formation pathways during acute infections.