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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.
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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.
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Cytotoxic T Cells-mediated Immune Response01:27

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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.
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Special Features of Adaptive Immunity01:20

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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.
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MAPK Signaling Cascades01:07

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Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
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B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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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.
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Related Experiment Video

Updated: Nov 11, 2025

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
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T cells: a dedicated effector kinase pathways for every trait?

Kriti Bahl1, Jeroen P Roose1

  • 1Department of Anatomy, University of California, San Francisco, San Francisco, CA 94143, U.S.A.

The Biochemical Journal
|March 23, 2021
PubMed
Summary

The extracellular signal-regulated kinase (ERK) pathway influences only a small part of the proteome changes in activated CD8+ T cells. This study highlights the limited role of ERK in T cell activation proteome remodeling.

Keywords:
T cellsextracellular signal-regulated kinaseshydrogen-deuterium exchange mass spectrometryproteome

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Area of Science:

  • Immunology
  • Cell Biology
  • Proteomics

Background:

  • T cell activation relies on signaling pathways initiated by T cell receptor (TCR) recognition of peptide-MHC complexes.
  • Effector kinase pathways are crucial for T cell activation, differentiation, and proliferation.
  • While gene expression is well-studied, the proteomic changes during T cell activation are less understood.

Purpose of the Study:

  • To characterize the impact of the extracellular signal-regulated kinase (ERK) pathway on the proteome of activated CD8+ T cells.
  • To contextualize the findings within the broader landscape of effector kinase pathways in T cell activation.

Main Methods:

  • Mass spectrometric analysis was employed to investigate proteomic alterations.
  • The study by Damasio et al. is discussed in the context of T cell signaling.

Main Results:

  • The ERK pathway was found to mediate the restructuring of only a select portion of the proteome in activated CD8+ T cells.
  • Key targets of ERK signaling include transcription factors, cytokines, and cytokine receptors.

Conclusions:

  • The proteomic remodeling during T cell activation involves more than just the ERK pathway.
  • Further research is needed to elucidate the roles of other effector kinase pathways in T cell activation and proteome dynamics.