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Related Concept Videos

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...
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...
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...
Multiple Sclerosis l: Introduction01:19

Multiple Sclerosis l: Introduction

Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...
Type II Diabetes I: Introduction01:26

Type II Diabetes I: Introduction

Type 2 diabetes mellitus (T2DM) is a chronic metabolic disorder characterized by insulin resistance, in which target tissues such as the liver, muscle, and adipose tissue respond poorly to insulin. It is also associated with inadequate compensatory insulin secretion, where pancreatic β-cells fail to produce sufficient insulin. Together, these abnormalities lead to persistent hyperglycemia.EtiologyT2DM develops through a complex interaction of genetic predisposition and environmental or...
Diabetes Mellitus: Overview and Type I Subtype01:22

Diabetes Mellitus: Overview and Type I Subtype

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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Induction and Diverse Assessment Indicators of Experimental Autoimmune Encephalomyelitis
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Published on: September 9, 2022

Type 1 Diabetes and Multiple Sclerosis Share General Autoimmunity Genetic Variation.

Maristella Steri1, Alessandro Testori2, Valeria Orrù1

  • 1Institute of Genetic and Biomedical Research (IRGB), Italian National Research Council (CNR), 09042 Monserrato, Italy.

Genes
|May 27, 2026
PubMed
Summary
This summary is machine-generated.

Type 1 diabetes (T1D) and multiple sclerosis (MS) share genetic links, with this study identifying 26 shared signals. Most signals indicate general autoimmune susceptibility, highlighting shared genetic factors in these distinct diseases.

Keywords:
autoimmunitycolocalizationeQTLexpressionexpression quantitative locimultiple sclerosispQTLtype 1 diabetes

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

Published on: May 6, 2013

Area of Science:

  • Immunology
  • Genetics
  • Epidemiology

Background:

  • Type 1 diabetes (T1D) and multiple sclerosis (MS) are autoimmune diseases with shared genetic and environmental risk factors.
  • Understanding their co-occurrence requires dissecting their common genetic architecture.

Purpose of the Study:

  • To identify shared genetic loci between T1D and MS using large-scale genome-wide association studies (GWASs) and colocalization analyses.
  • To discover novel genetic associations for T1D and MS through shared signal prioritization.

Main Methods:

  • Bayesian colocalization framework applied to large GWAS datasets for T1D (18,942 cases, 501,638 controls) and MS (14,802 cases, 26,703 controls).
  • Identification and validation of shared genetic association signals.

Main Results:

  • Identified 26 shared colocalizing association signals between T1D and MS.
  • Discovered 7 novel loci for T1D and 2 novel loci for MS.
  • Found that 17 out of 26 signals represent shared general autoimmune susceptibility, while 9 showed disease-specific effects.

Conclusions:

  • Colocalization is a powerful tool for discovering shared genetic architecture in related disorders.
  • Prioritizing shared causal variants enhances the detection of novel disease loci.
  • T1D and MS share predominantly general autoimmune susceptibility signals, but also exhibit immunological heterogeneity.