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Related Concept Videos

Diabetes Mellitus: Type 2 and Gestational01:22

Diabetes Mellitus: Type 2 and Gestational

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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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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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Diabetes Mellitus: Introduction01:26

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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...
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Type I Diabetes II: Pathophysiology01:26

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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

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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

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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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Diabetes mellitus and genetically programmed defects in beta-cell function.

G I Bell1, K S Polonsky

  • 1Howard Hughes Medical Institute, Department of Biochemistry, Medicine and Human Genetics, The University of Chicago, Chicago, Illinois 60637, USA. g-bell@uchicago.edu)

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Summary
This summary is machine-generated.

Understanding the genetic basis of diabetes is key. Identifying genes controlling insulin secretion and beta-cell mass offers new insights and potential treatments for diabetes mellitus.

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Area of Science:

  • Endocrinology
  • Genetics
  • Metabolic Diseases

Background:

  • Insulin secretion and pancreatic beta-cell mass regulation are vital for diabetes mellitus development.
  • Maturity-onset diabetes of the young (MODY) involves single-gene disorders impacting beta-cell function, leading to early-onset diabetes.
  • Type 2 diabetes, a common form affecting adults, also features abnormal beta-cell function, alongside broader tissue involvement, with a less defined genetic basis.

Purpose of the Study:

  • To explore the genetic underpinnings of both monogenic and polygenic diabetes.
  • To elucidate the role of specific genes in insulin secretion and beta-cell mass.
  • To identify novel therapeutic targets for diabetes mellitus.

Main Methods:

  • Genetic analysis of individuals with monogenic diabetes (MODY).
  • Investigating susceptibility genes in common type 2 diabetes.
  • Comparative genomics to identify conserved pathways.

Main Results:

  • Causative and susceptibility genes have been identified for various forms of diabetes.
  • These genes provide critical insights into insulin action and secretion pathways.
  • Understanding genetic links aids in comprehending disease mechanisms.

Conclusions:

  • Gene identification is crucial for understanding diabetes pathogenesis.
  • Insights from genetic studies can inform the development of new diabetes treatments.
  • Targeting specific genetic pathways holds promise for future therapies.