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Related Concept Videos

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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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 I Diabetes III: Clinical Manifestations01:19

Type I Diabetes III: Clinical Manifestations

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Type 1 diabetes mellitus typically presents with rapid-onset symptoms due to the body’s inability to utilize glucose in the absence of insulin. Since insulin is required for glucose uptake into cells, its deficiency leads to hyperglycemia and cellular energy deprivation, resulting in characteristic clinical features.Polyuria and PolydipsiaOne of the earliest, most prominent symptoms is polyuria (excessive urination). When blood glucose concentrations rise above the renal threshold, the...
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Diabetes Mellitus: Overview and Type I Subtype01:22

Diabetes Mellitus: Overview and Type I Subtype

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Diabetes mellitus is a chronic metabolic disorder characterized by high blood glucose levels due to inadequate insulin production, insulin resistance, or both. The condition affects millions worldwide and can significantly impact their health and quality of life.
Type 1 diabetes is an autoimmune disease in which the immune system mistakenly attacks and destroys the insulin-producing beta cells in the pancreas. As a result, the body is unable to produce sufficient insulin, and individuals with...
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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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Oral Hypoglycemic Agents: Biguanides and Glitazones01:26

Oral Hypoglycemic Agents: Biguanides and Glitazones

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Biguanides, particularly metformin (Glucophage), are insulin sensitizers that enhance glucose uptake, thereby reducing insulin resistance. Unlike sulfonylureas, metformin doesn't prompt insulin secretion, which helps to curb hypoglycemia risk. Metformin is beneficial in treating conditions like polycystic ovary syndrome due to its insulin-resistance reduction capability. The drug's primary action involves curtailing hepatic gluconeogenesis, a significant contributor to high blood...
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Insulin resistance and cognitive dysfunction.

Lina Ma1, Jieyu Wang1, Yun Li1

  • 1Department of Geriatrics, Xuan Wu Hospital, Capital Medical University, Beijing 100053, China.

Clinica Chimica Acta; International Journal of Clinical Chemistry
|February 10, 2015
PubMed
Summary
This summary is machine-generated.

Type 2 diabetes mellitus is linked to Alzheimer's disease, with insulin resistance potentially driving cognitive impairment and neurodegeneration. Brain insulin resistance emerges as a significant independent risk factor for cognitive decline.

Keywords:
Alzheimer's diseaseInsulinInsulin resistanceMild cognitive impairment

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Area of Science:

  • Neuroscience
  • Endocrinology
  • Epidemiology

Background:

  • Epidemiologic and biologic studies suggest a connection between type 2 diabetes mellitus (T2DM) and Alzheimer's disease (AD).
  • The precise mechanisms linking T2DM and AD remain incompletely understood.
  • Insulin plays a critical role in maintaining cognitive function.

Purpose of the Study:

  • To discuss the relationship between insulin resistance and cognitive impairment.
  • To review potential pathophysiologic mechanisms underlying this association.
  • To highlight the role of impaired insulin signaling in cognitive dysfunction.

Main Methods:

  • Literature review of epidemiologic and biologic studies.
  • Discussion of the role of insulin in cognitive function.
  • Analysis of evidence linking insulin resistance to cognitive impairment.

Main Results:

  • Growing evidence implicates insulin resistance in the pathogenesis of cognitive impairment and neurodegeneration.
  • Impaired insulin signaling is relevant to the mechanisms of cognitive dysfunction.
  • Brain insulin resistance is identified as an independent risk factor for cognitive impairment.

Conclusions:

  • Insulin resistance is a key factor in the development of cognitive impairment.
  • Understanding the link between T2DM and AD may offer new therapeutic targets.
  • Brain insulin resistance represents a significant risk factor for cognitive decline.