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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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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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Cells of the Adaptive Immune Response01:23

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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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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.
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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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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Preparation and Applications of Organotypic Thymic Slice Cultures
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T cell development made EZ.

Marieke Lavaert1, Avinash Bhandoola1

  • 1Laboratory of Genome Integrity, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.

Cell Stem Cell
|August 5, 2022
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Summary
This summary is machine-generated.

Researchers inhibited EZH1 to develop mature T cells from induced pluripotent stem cells (iPSCs) in vitro. These T cells effectively target and fight tumors, showing promise for cancer immunotherapy.

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Derivation of T Cells In Vitro from Mouse Embryonic Stem Cells
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Derivation of T Cells In Vitro from Mouse Embryonic Stem Cells

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Area of Science:

  • Immunology
  • Stem Cell Biology
  • Cancer Research

Background:

  • Mature T cell generation from induced pluripotent stem cells (iPSCs) is crucial for cell-based therapies.
  • Targeting specific gene expression is key to directing stem cell differentiation.
  • Enhancer of Zeste Homolog 1 (EZH1) plays a role in epigenetic regulation.

Purpose of the Study:

  • To investigate the role of EZH1 inhibition in T cell development from iPSCs.
  • To generate functional T cells for potential anti-tumor applications.
  • To establish an in vitro system for efficient T cell generation.

Main Methods:

  • Utilized induced pluripotent stem cells (iPSCs) for T cell differentiation.
  • Inhibited EZH1 gene expression during the differentiation process.
  • Assessed T cell maturation and functionality in vitro.
  • Evaluated anti-tumor efficacy of generated T cells.

Main Results:

  • Successfully generated mature T cells from iPSCs with inhibited EZH1.
  • The differentiated T cells exhibited high functionality.
  • Demonstrated significant anti-tumor activity in vitro.
  • Established an efficient protocol for T cell generation.

Conclusions:

  • Inhibiting EZH1 promotes the development of functional T cells from iPSCs.
  • This approach offers a promising strategy for generating T cells for cancer immunotherapy.
  • The developed in vitro system provides a scalable method for T cell production.