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Related Concept Videos

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...
Diabetes Mellitus: Type 2 and Gestational01:22

Diabetes Mellitus: Type 2 and Gestational

Type 2 diabetes, characterized by insulin resistance, arises when the insulin receptors on cells lose responsiveness to insulin, diminishing the cell's capacity to take up glucose, resulting in elevated blood glucose levels. To receive a diagnosis of Type 2 diabetes, a series of blood glucose tests are necessary to assess whether the blood glucose falls within normal parameters. If the result is out of the normal range, a patient may be diagnosed as prediabetic or diabetic, depending on the...
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...
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...
Type II Diabetes II: Pathophysiology01:24

Type II Diabetes II: Pathophysiology

PathophysiologyType 2 diabetes mellitus (T2DM ) is a chronic metabolic disorder characterized by insulin resistance and progressive pancreatic β-cell dysfunction, leading to impaired glucose homeostasis. It results from interactions among genetic predisposition, environmental factors, and metabolic stressors, such as overnutrition and a sedentary lifestyle.Insulin Resistance and Glucose DysregulationEarly T2DM involves insulin resistance in skeletal muscle, adipose tissue, and the liver.

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Accelerated Type 1 Diabetes Induction in Mice by Adoptive Transfer of Diabetogenic CD4+ T Cells
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Immune cell-based transcriptomic Mendelian randomization and colocalization study on type 1 diabetes.

Julie Sklar1, David Stacey2,3, Grace Nickel4

  • 1Frank H. Netter MD School of Medicine, Quinnipiac University, North Haven, CT, USA.

BMC Medicine
|November 27, 2025
PubMed
Summary
This summary is machine-generated.

This study identified 21 novel genes, including VSIR and P2RY12, as potential targets for preventing type 1 diabetes (T1D). These findings offer new drug development and repurposing opportunities for T1D prevention.

Keywords:
Drug developmentGenetic epidemiologyMendelian randomizationTranscriptomicsType 1 diabetes

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Area of Science:

  • Immunology
  • Genetics
  • Pharmacology

Background:

  • Type 1 diabetes (T1D) is an immune-mediated disease with limited prevention strategies.
  • Identifying novel therapeutic targets is crucial for preventing T1D onset.

Purpose of the Study:

  • To discover new therapeutic targets for T1D prevention using Mendelian randomization and colocalization.
  • To leverage immune cell-derived genetic instruments for target identification.

Main Methods:

  • Utilized genetic variants from 14 transcriptomic studies to instrument gene expression in immune cells.
  • Analyzed a large T1D genome-wide association study (GWAS) dataset (18,942 cases, 501,638 controls).
  • Performed phenome-wide scans with colocalization (PheWAS-coloc) to assess novelty and pleiotropy.

Main Results:

  • Prioritized 21 novel genes not previously linked to T1D in GWAS.
  • Identified VSIR (VISTA) as protective against T1D, with higher genetic prediction associated with decreased risk.
  • Highlighted P2RY12 as a drug repurposing opportunity and linked its expression to Epstein-Barr virus antibody levels.

Conclusions:

  • The study provides novel genetic targets for T1D drug development.
  • Findings suggest potential for repurposing existing drugs, like those targeting P2RY12.
  • Offers new avenues to prevent or delay the onset of type 1 diabetes.