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Related Concept Videos

Carbohydrate Metabolism01:36

Carbohydrate Metabolism

Carbohydrates are polymers composed of molecules containing atoms of carbon, hydrogen and oxygen. One gram of carbohydrate can provide four kilo-calories of energy, which makes it the most efficient instant energy source.
Starch accounts for approximately 60% of the carbohydrates consumed by humans. Since amylase enzymes cannot function in the stomach's acidic environment, starch can only be digested in the mouth and small intestine. Simple sugars are found naturally in milk and fruits in the...
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.
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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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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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Isolation of Human Islets from Partially Pancreatectomized Patients
11:10

Isolation of Human Islets from Partially Pancreatectomized Patients

Published on: July 30, 2011

Cholesterol in islet dysfunction and type 2 diabetes.

Liam R Brunham1, Janine K Kruit, C Bruce Verchere

  • 1Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada.

The Journal of Clinical Investigation
|February 5, 2008
PubMed
Summary
This summary is machine-generated.

Altered cholesterol metabolism and ABCA1 transporter function in pancreatic beta cells may contribute to type 2 diabetes (T2D) pathogenesis by affecting insulin secretion and islet function.

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Last Updated: Jul 6, 2026

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11:10

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Leprdb Mouse Model of Type 2 Diabetes: Pancreatic Islet Isolation and Live-cell 2-Photon Imaging Of Intact Islets
10:09

Leprdb Mouse Model of Type 2 Diabetes: Pancreatic Islet Isolation and Live-cell 2-Photon Imaging Of Intact Islets

Published on: May 11, 2015

Area of Science:

  • Endocrinology
  • Metabolic Diseases
  • Lipid Metabolism

Background:

  • Type 2 diabetes (T2D) is often associated with abnormal plasma lipoproteins.
  • The specific role of elevated plasma cholesterol in T2D pathogenesis remains unclear.
  • Emerging evidence links altered cholesterol levels in plasma and pancreatic islets to impaired insulin secretion.

Purpose of the Study:

  • To review the impact of cholesterol metabolism on islet function.
  • To explore the potential relationship between cholesterol metabolism and T2D.
  • To highlight the role of ABCA1 in cholesterol homeostasis and insulin secretion.

Main Methods:

  • Literature review of studies on cholesterol metabolism, islet function, and T2D.
  • Analysis of genetic studies implicating lipid metabolism genes in T2D.
  • Focus on the role of the ABCA1 cholesterol transporter.

Main Results:

  • Cholesterol metabolism significantly influences pancreatic islet function.
  • ABCA1 plays a crucial role in regulating cholesterol homeostasis within beta cells.
  • ABCA1's function is linked to maintaining proper insulin secretion.

Conclusions:

  • Disruptions in cholesterol metabolism, particularly involving ABCA1, are implicated in T2D.
  • Targeting cholesterol transport pathways may offer therapeutic strategies for T2D.
  • Further research is needed to fully elucidate the cholesterol-T2D connection.