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Related Concept Videos

T Cell Types and Functions01:24

T Cell Types and Functions

3.4K
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...
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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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Diabetes Mellitus: Overview and Type I Subtype01:22

Diabetes Mellitus: Overview and Type I Subtype

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Diabetes mellitus is a chronic metabolic disorder characterized by high blood glucose levels due to inadequate insulin production, insulin resistance, or both. The condition affects millions worldwide and can significantly impact their health and quality of life.
Type 1 diabetes is an autoimmune disease in which the immune system mistakenly attacks and destroys the insulin-producing beta cells in the pancreas. As a result, the body is unable to produce sufficient insulin, and individuals with...
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Related Experiment Video

Updated: Apr 8, 2026

Accelerated Type 1 Diabetes Induction in Mice by Adoptive Transfer of Diabetogenic CD4+ T Cells
06:27

Accelerated Type 1 Diabetes Induction in Mice by Adoptive Transfer of Diabetogenic CD4+ T Cells

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CD4 T cell differentiation in type 1 diabetes.

L S K Walker1, M von Herrath2

  • 1Institute of Immunity and Transplantation, University College London Division of Infection and Immunity, Royal Free Campus, London, UK.

Clinical and Experimental Immunology
|June 24, 2015
PubMed
Summary

Human leucocyte antigen (HLA) genes strongly influence type 1 diabetes risk, implicating T cells. This study explores CD4 T cell differentiation in autoimmune diabetes, revealing new insights into disease mechanisms and potential therapeutic targets.

Keywords:
T cellscytokine differentiationdiabetes

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Area of Science:

  • Immunology
  • Endocrinology
  • Genetics

Background:

  • Type 1 diabetes (T1D) susceptibility is linked to human leucocyte antigen (HLA) genes, suggesting T cell involvement in pathogenesis.
  • While CD8 T cells infiltrate islets, CD4 T cell help is crucial for their activation and propagation.
  • CD4 T cell differentiation fates significantly impact cytokine production, migration, and interactions with other immune cells, influencing effector functions.

Purpose of the Study:

  • To re-evaluate T cell differentiation in autoimmune diabetes.
  • To highlight new evidence from mouse models and patient samples regarding T cell roles in T1D.
  • To assess the role of T helper type 1 (Th1) cells and explore emerging evidence for Th17, interleukin-17 (IL-17), IL-21, and follicular helper T cells in T1D.

Main Methods:

  • Review of existing literature on T cell differentiation in autoimmune diabetes.
  • Analysis of data from mouse models of T1D.
  • Examination of patient samples to assess T cell phenotypes in T1D.

Main Results:

  • The Th1 paradigm for T1D is re-examined, considering its strengths and weaknesses.
  • Evidence for IL-17 production in T1D is reviewed.
  • Emerging data on the roles of IL-21 and follicular helper T cells in T1D pathogenesis are discussed.

Conclusions:

  • Understanding CD4 T cell phenotypes in T1D is critical for developing biomarkers and therapeutic strategies.
  • Further research into T cell differentiation pathways may reveal new targets for T1D intervention.
  • This study contributes to a more nuanced understanding of T cell involvement in autoimmune diabetes.