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Related Concept Videos

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...
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...
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...

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Related Experiment Video

Updated: Jun 26, 2026

In Vitro Differentiation of Naive CD4+ T Cells into Pathogenic Th17 Cells in Mouse
07:46

In Vitro Differentiation of Naive CD4+ T Cells into Pathogenic Th17 Cells in Mouse

Published on: October 25, 2024

[Research advances in Th17 cells].

Xin-Gui Dai1, Yong-Ming Yao, Yu-Hang Ai

  • 1Burn Institute, First Hospital Affiliated the Chinese PLA General Hospital, Beijing 100037, China.

Sheng Li Ke Xue Jin Zhan [Progress in Physiology]
|January 6, 2009
PubMed
Summary
This summary is machine-generated.

The discovery of T helper 17 (Th17) cells, which release interleukin-17, challenges traditional immunology. Understanding the balance between Th1, Th2, regulatory T cells (Treg), and Th17 cells is crucial for immune response and disease research.

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Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes

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Retroviral CRISPR/Cas9-Mediated Gene Targeting for the Study of Th17 Differentiation in Vitro
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Retroviral CRISPR/Cas9-Mediated Gene Targeting for the Study of Th17 Differentiation in Vitro

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Area of Science:

  • Immunology
  • Cell Biology

Context:

  • CD4+ T cells differentiate into distinct subsets based on cytokine production, including T helper 1 (Th1), Th2, and regulatory T cells (Treg).
  • A novel T cell subpopulation, T helper 17 (Th17) cells, has been identified, defined by their secretion of interleukin-17 (IL-17).

Purpose:

  • To introduce the identification and characteristics of Th17 cells.
  • To highlight the implications of Th17 cells in challenging existing immunological theories.
  • To underscore the importance of Th17 cells in understanding immune regulation and disease pathogenesis.

Summary:

  • Th17 cells represent a significant addition to the known CD4+ T cell subsets.
  • Their discovery prompts a re-evaluation of CD4+ T cell differentiation pathways and the Th1/Th2 paradigm.
  • The balance among Th1, Th2, Treg, and Th17 cells is critical for maintaining immune homeostasis.

Impact:

  • Advances understanding of T cell subsets and immune system regulation.
  • Offers new avenues for researching inflammatory and immunologic diseases.
  • Emphasizes the critical role of cytokine-producing T cell populations in health and disease.