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Related Concept Videos

Pathophysiology of Diabetes01:20

Pathophysiology of Diabetes

3.9K
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,...
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Type I Diabetes I: Introduction01:12

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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...
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Type I Diabetes II: Pathophysiology01:26

Type I Diabetes II: Pathophysiology

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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...
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Type II Diabetes I: Introduction01:26

Type II Diabetes I: Introduction

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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...
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Type II Diabetes II: Pathophysiology01:24

Type II Diabetes II: Pathophysiology

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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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Diabetic Nephropathy01:28

Diabetic Nephropathy

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Definition Diabetic nephropathy is a chronic kidney complication that results from prolonged hyperglycemia.Prevalence It is the most common cause of chronic kidney disease (CKD) and end-stage renal disease (ESRD) worldwide, affecting up to half of individuals with diabetes.Pathophysiology • Sustained hyperglycemia triggers multiple hemodynamic and metabolic changes in the kidney. • Early in the disease, increased renal blood flow and glomerular hyperfiltration...
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Methods to Assess Beta Cell Death Mediated by Cytotoxic T Lymphocytes
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beta-Cell death during progression to diabetes.

D Mathis1, L Vence, C Benoist

  • 1Section on Immunology and Immunogenetics, Joslin Diabetes Centre, One Joslin Place, Boston, Massachusetts 02215, USA.

Nature
|December 14, 2001
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Summary

Beta-cell apoptosis, the programmed death of insulin-producing cells, is central to type 1 diabetes development. This cell death drives inflammation and insulin deficiency, potentially influencing type 2 diabetes progression.

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Area of Science:

  • Endocrinology
  • Immunology
  • Cell Biology

Background:

  • Type 1 diabetes is characterized by the autoimmune destruction of pancreatic islet beta-cells.
  • Beta-cell apoptosis plays a critical role in the pathogenesis of type 1 diabetes.

Purpose of the Study:

  • To elucidate the role of beta-cell apoptosis in type 1 diabetes progression.
  • To understand how beta-cell apoptosis contributes to immune cell infiltration and insulin deficiency.

Main Methods:

  • Review of existing literature on beta-cell apoptosis in diabetes.
  • Analysis of pathways involved in beta-cell death and immune response.

Main Results:

  • Beta-cell apoptosis is a key event initiating leukocyte invasion of pancreatic islets.
  • The loss of beta-cells through apoptosis leads to a cessation of insulin production.
  • Beta-cell apoptosis may contribute to the transition from type 2 to type 1 diabetes.

Conclusions:

  • Beta-cell apoptosis is a fundamental mechanism in type 1 diabetes.
  • Targeting beta-cell apoptosis could be a therapeutic strategy for type 1 diabetes.
  • Understanding beta-cell apoptosis is crucial for managing diabetes progression.