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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...
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: Jul 12, 2026

Mouse Naïve 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

CD8(+) T cell differentiation: choosing a path through T-bet.

Sara E Hamilton1, Stephen C Jameson

  • 1Center for Immunology and Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Minneapolis, MN 55454, USA.

Immunity
|August 29, 2007
PubMed
Summary

Inflammatory cytokines influence whether activated CD8(+) T cells become short-lived effector cells or long-lived memory cells. This balance is controlled by the transcription factor T-bet, according to new research.

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Last Updated: Jul 12, 2026

Mouse Naïve 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

Examination of Thymic Positive and Negative Selection by Flow Cytometry
14:29

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Published on: October 8, 2012

Directed Differentiation of Induced Pluripotent Stem Cells towards T Lymphocytes
12:47

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Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Activated CD8(+) T cells have two differentiation pathways: transient effector cells and long-lived memory cells.
  • The factors governing this crucial differentiation balance are not fully understood.

Discussion:

  • Joshi et al. propose that inflammatory cytokines play a key role in directing CD8(+) T cell differentiation.
  • These cytokines appear to regulate the expression of the transcription factor T-bet, a critical regulator of T cell fate.

Key Insights:

  • Inflammatory cytokines are identified as key determinants of CD8(+) T cell effector versus memory differentiation.
  • Regulation of T-bet expression by cytokines is highlighted as the central mechanism controlling this balance.

Outlook:

  • Further investigation into cytokine-T-bet interactions could reveal novel therapeutic targets for modulating adaptive immunity.
  • Understanding this balance is crucial for developing effective vaccines and immunotherapies.