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Related Concept Videos

Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

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.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
Autoimmune Disorders01:29

Autoimmune Disorders

Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune system...
Pathophysiology of Diabetes01:20

Pathophysiology of Diabetes

Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility, suggesting a...
Diabetes Mellitus: Introduction01:26

Diabetes Mellitus: Introduction

Diabetes mellitus consists of chronic metabolic disorders characterized by persistent hyperglycemia. This elevated blood glucose results from defects in insulin secretion, impaired insulin action, or both. Insulin, produced by pancreatic β-cells, is essential for maintaining glucose homeostasis by facilitating cellular glucose uptake for energy or storage. Disruptions in insulin production or function lead to glucose accumulation in the bloodstream, causing the clinical features and long-term...
Type I Diabetes I: Introduction01:12

Type I Diabetes I: Introduction

Type 1 diabetes mellitus is a chronic metabolic disorder characterized by an absolute deficiency of insulin resulting from the autoimmune destruction of pancreatic β-cells. Although it can occur at any age, it is most commonly diagnosed in childhood, adolescence, or early adulthood. The loss of insulin production impairs cellular glucose uptake, resulting in persistent hyperglycemia and necessitating lifelong insulin therapy.Autoimmune Destruction of β-CellsThe hallmark of type 1 diabetes is an...
Type I Diabetes II: Pathophysiology01:26

Type I Diabetes II: Pathophysiology

Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular uptake of...

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Related Experiment Video

Updated: Jul 16, 2026

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

Published on: May 6, 2013

T-cell tolerance and autoimmune diabetes.

T D Brumeanu1, C A Bona, S Casares

  • 1Department of Microbiology, Mount Sinai School of Medicine, New York, NY 10029, USA.

International Reviews of Immunology
|March 7, 2002
PubMed
Summary

Researchers explored T-cell signaling and anergy induction for autoimmune disease therapies. A novel dimeric MHC class-II/peptide molecule shows potential for antigen-specific immunomodulation and treating conditions like Type 1 diabetes.

Area of Science:

  • Immunology
  • Autoimmune Diseases
  • Therapeutic Development

Background:

  • T-cell receptor (TCR) engagement triggers critical signaling pathways in T-cells.
  • T-cell anergy mechanisms are crucial for understanding and treating T-cell mediated autoimmune diseases.
  • Current therapies for autoimmune diseases lack antigen specificity.

Purpose of the Study:

  • To elucidate T-cell signaling upon TCR engagement and mechanisms of T-cell anergy.
  • To introduce a novel dimeric MHC class-II/peptide (DEF) molecule for antigen-specific immunomodulation.
  • To explore the potential of DEF as an antidiabetogenic agent and in other autoimmune conditions.

Main Methods:

  • Analysis of T-cell signaling pathways post-TCR engagement.
  • Development and characterization of dimeric MHC class-II/peptide (DEF) molecules.

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Last Updated: Jul 16, 2026

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  • In vitro and preliminary in vivo assessments of DEF's immunomodulatory effects, including Th2 polarization and T-cell anergy induction.

    • Main Results:

    • Detailed description of key signaling events in T-cells following TCR engagement.
    • Demonstration of DEF's capacity to induce antigen-specific Th2 polarization and T-cell anergy.
    • Preliminary evidence suggests DEF's potential as an antidiabetogenic agent.

    Conclusions:

    • Understanding T-cell signaling and anergy is vital for developing immunospecific therapies.
    • Dimeric MHC class-II/peptide (DEF) molecules represent a promising platform for antigen-specific immunomodulation.
    • MHC II/peptide-based strategies offer a rational approach for treating CD4 T-cell-mediated autoimmune diseases like Type 1 diabetes and multiple sclerosis.