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Related Concept Videos

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.
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 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...
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.
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, suggesting a...
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...

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Related Experiment Video

Updated: Jul 6, 2026

Cell-free Biochemical Fluorometric Enzymatic Assay for High-throughput Measurement of Lipid Peroxidation in High Density Lipoprotein
07:29

Cell-free Biochemical Fluorometric Enzymatic Assay for High-throughput Measurement of Lipid Peroxidation in High Density Lipoprotein

Published on: October 12, 2017

Why is HDL functionally deficient in type 2 diabetes?

Anatol Kontush1, M John Chapman

  • 1INSERM Unité 551, Pavillon Benjamin Delessert, Hôpital de Pitié, 83 boulevard de l'Hôpital, 75651 Paris Cedex 13, France. kontush@chups.jussieu.fr

Current Diabetes Reports
|March 28, 2008
PubMed
Summary
This summary is machine-generated.

Type 2 diabetes impairs high-density lipoprotein (HDL) function through triglyceride enrichment and apolipoprotein A-I changes. Targeting hypertriglyceridemia is key to restoring HDL

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Area of Science:

  • Cardiovascular Science
  • Metabolic Disorders
  • Lipid Metabolism

Background:

  • High-density lipoprotein (HDL) particles possess atheroprotective properties.
  • These protective functions are often compromised in individuals with type 2 diabetes.

Purpose of the Study:

  • To elucidate the mechanisms behind functionally deficient HDL in type 2 diabetes.
  • To identify the primary drivers of HDL dysfunction in this patient population.

Main Methods:

  • Analysis of HDL composition, including triglyceride and cholesteryl ester content.
  • Assessment of apolipoprotein A-I conformation.
  • Evaluation of HDL-associated glycation and oxidative modifications.

Main Results:

  • HDL particles in type 2 diabetes show enrichment in triglycerides and depletion in cholesteryl esters.
  • Conformational alterations of apolipoprotein A-I are observed.
  • Glycation and oxidative modifications affect HDL-associated proteins and lipids.

Conclusions:

  • Hypertriglyceridemia is a major factor in the functional decline of HDL in type 2 diabetes.
  • Compositional changes in HDL, particularly triglyceride enrichment and altered apolipoprotein A-I structure, contribute to dysfunction.
  • Therapeutic strategies should focus on managing hypertriglyceridemia to improve HDL function.