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Related Concept Videos

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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Glucose Homeostasis: Pancreatic Islets and Insulin Secretion01:27

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The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are...
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Diabetes Mellitus: Type 2 and Gestational01:22

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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...
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Insulin Secretory Vesicles01:05

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Insulin secretory vesicles release insulin to stimulate blood glucose uptake and regulate carbohydrate metabolism. When the blood glucose levels increase, glucose enters the pancreatic β-islet cells through glucose transporters. Once inside, glucose is metabolized through glycolysis, the citric acid cycle, and the electron transport chain, producing ATP. This increase in ATP concentration closes ATP-sensitive potassium channels, leading to depolarization of the membrane and the opening of...
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Pathophysiology of Diabetes01:20

Pathophysiology of Diabetes

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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.
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Introduction
Inflammatory bowel disease, commonly known as IBD, refers to a collection of disorders that lead to persistent inflammation of the gastrointestinal tract. The two types of IBD are ulcerative colitis, which impacts the colon, and Crohn's disease, which can involve any part of the gastrointestinal segment.
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Related Experiment Video

Updated: Mar 22, 2026

Accelerated Type 1 Diabetes Induction in Mice by Adoptive Transfer of Diabetogenic CD4+ T Cells
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[Insulitis in type 1 diabetes].

P In't Veld1, G Klöppel2

  • 1Dept of Pathology, Diabetes Research Center, Vrije Universiteit Brussel, Brussel, Belgien.

Der Pathologe
|April 30, 2016
PubMed
Summary
This summary is machine-generated.

Type 1 diabetes mellitus (T1DM) is a chronic autoimmune disease characterized by insulitis, the key lesion involving gradual destruction of pancreatic beta cells. Understanding T1DM pathogenesis is crucial for developing targeted treatments.

Keywords:
Diabetes mellitus, type 1Morphological findingsPancreasPathogenesisTherapy

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Area of Science:

  • Immunology
  • Endocrinology
  • Pathology

Background:

  • Type 1 diabetes mellitus (T1DM) is characterized by insulitis, a key morphological lesion.
  • Recent diagnostic criteria for T1DM have been established.
  • The pathogenesis of T1DM involves gradual autoimmune destruction of pancreatic beta cells.

Observation:

  • Immunophenotype analysis reveals lymphocytic infiltration in T1DM.
  • The frequency and extent of insulitis vary during the course of T1DM.
  • Autoantibodies against beta cell proteins are present in T1DM patients.

Findings:

  • T1DM is a chronic autoimmune disease.
  • The disease leads to progressive loss of insulin-producing cells in the islets of Langerhans.
  • Profound insulin deficiency and chronic hyperglycemia are consequences of beta cell destruction.

Implications:

  • Morphological findings support the autoimmune hypothesis of T1DM.
  • Further research is needed to fully elucidate T1DM pathogenesis.
  • Clarifying pathogenesis may lead to the development of specific T1DM treatments.