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Related Concept Videos

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...
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 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...
Diabetes Mellitus: Introduction01:26

Diabetes Mellitus: Introduction

Diabetes mellitus consists of chronic metabolic disorders characterized by persistent hyperglycemia. This elevated blood glucose results from defects in insulin secretion, impaired insulin action, or both. Insulin, produced by pancreatic β-cells, is essential for maintaining glucose homeostasis by facilitating cellular glucose uptake for energy or storage. Disruptions in insulin production or function lead to glucose accumulation in the bloodstream, causing the clinical features and long-term...
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...

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Pathophysiology of prediabetes.

Ele Ferrannini1, Amalia Gastaldelli, Patricia Iozzo

  • 1Department of Internal Medicine, University of Pisa School of Medicine, Via Roma, 67, 56100 Pisa, Italy. ferranni@ifc.cnr.it

The Medical Clinics of North America
|February 2, 2011
PubMed
Summary
This summary is machine-generated.

Prediabetes is a continuum from normal glucose tolerance to type 2 diabetes, characterized by insulin resistance and impaired beta-cell function. Key factors include excessive fat utilization and weight gain, leading to hyperglycemia, dyslipidemia, and hypertension.

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Modeling and Evaluation of Murine Diabetic Cardiomyopathy Model

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Area of Science:

  • Endocrinology
  • Metabolic Diseases
  • Diabetes Research

Background:

  • Prediabetes represents a critical transitional phase between normal glucose tolerance and overt type 2 diabetes.
  • It is characterized by a spectrum of glucose concentrations, not just isolated diagnostic categories.
  • Understanding prediabetes is crucial for early intervention and prevention of diabetes complications.

Purpose of the Study:

  • To define prediabetes as a continuum of glucose metabolism.
  • To elucidate the central pathophysiologic mechanisms driving hyperglycemia in prediabetes.
  • To identify key metabolic and clinical features associated with the prediabetic state.

Main Methods:

  • The study reviews established pathophysiologic concepts in glucose metabolism.
  • It synthesizes current understanding of insulin resistance and beta-cell function.
  • Analysis incorporates genetic and acquired factors influencing glucose homeostasis.

Main Results:

  • Hyperglycemia in prediabetes stems from insulin resistance and defective pancreatic beta-cell glucose sensing.
  • Excessive tissue fat utilization is a consistent metabolic mechanism underlying insulin resistance.
  • Overweight status is identified as a primary acquired challenge to insulin action, alongside genetic predispositions.

Conclusions:

  • Prediabetes is a dynamic phase on a continuum towards type 2 diabetes.
  • Insulin resistance and beta-cell dysfunction are core determinants of prediabetic hyperglycemia.
  • The prediabetes phenotype includes associated metabolic abnormalities like dyslipidemia and hypertension.