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Related Concept Videos

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.
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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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B Cell Activation and Differentiation01:24

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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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T Cell Types and Functions01:24

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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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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
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Related Experiment Video

Updated: Aug 4, 2025

Real-time Monitoring of Mitochondrial Respiration in Cytokine-differentiated Human Primary T Cells
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Decoding the crosstalk between mevalonate metabolism and T cell function.

Kelly T Kennewick1, Steven J Bensinger1,2

  • 1Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, California, USA.

Immunological Reviews
|March 31, 2023
PubMed
Summary

The mevalonate pathway is crucial for T cell function, controlling their development and activity. Proper regulation of this metabolic pathway ensures T cells maintain cholesterol balance and function effectively.

Keywords:
T cellscholesterolisoprenoidsmevalonate pathwaystatins

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Area of Science:

  • Immunology
  • Metabolic pathways
  • Cellular metabolism

Background:

  • The mevalonate pathway is vital for T cell development, proliferation, survival, differentiation, and effector functions.
  • This pathway is a complex, branched system producing cholesterol and nonsterol isoprenoids.
  • T cells require precise control of metabolic flux for adequate isoprenoid and cholesterol production.

Purpose of the Study:

  • To review the regulation of mevalonate pathway branches in T cells.
  • To discuss the link between mevalonate metabolism, cholesterol homeostasis, and T cell function.

Main Methods:

  • Literature review of T cell metabolism and the mevalonate pathway.
  • Analysis of regulatory mechanisms controlling metabolic flux.
  • Synthesis of current understanding on cholesterol homeostasis and T cell function.

Main Results:

  • The mevalonate pathway's branches are tightly regulated in T cells.
  • Imbalanced flux can lead to metabolic inefficiency and negatively impact T cell fate.
  • Cholesterol homeostasis is intrinsically linked to T cell function via this pathway.

Conclusions:

  • Understanding mevalonate pathway regulation is key to T cell biology.
  • Dysregulation impacts T cell function, highlighting therapeutic potential.
  • Further research is needed to fully elucidate these complex interactions.