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Related Concept Videos

Hypoglycemia and Glucagon01:15

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Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...
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Pathophysiology of Diabetes01:20

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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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Oral Hypoglycemic Agents: Biguanides and Glitazones01:26

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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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Diabetes Mellitus: Type 2 and Gestational01:22

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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: Symptoms, Diagnosis, and Complications01:15

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For most patients, experiencing several weeks of polyuria, polydipsia, fatigue, and significant weight loss may indicate the presence of diabetes. Furthermore, adults displaying the phenotypic appearance of type 2 diabetes (particularly those who are obese and not initially insulin-requiring), may have islet cell autoantibodies, suggesting autoimmune-mediated β cell destruction and a diagnosis of latent autoimmune diabetes of adults (LADA). The categorization of glucose homeostasis is...
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Diabetes Mellitus: Overview and Type I Subtype01:22

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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.
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Related Experiment Video

Updated: Mar 29, 2026

Combined Intravital Microscopy and Contrast-enhanced Ultrasonography of the Mouse Hindlimb to Study Insulin-induced Vasodilation and Muscle Perfusion
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Hyperglycemia-Induced Endothelial Dysfunction: From Classical Pathogenetic Mechanisms to Emerging Insights into ACE2

Giada Lodi1, Domenico Sergi2, Anna Dipinto3

  • 1Department of Translational Medicine and LTTA Centre, University of Ferrara, 44121 Ferrara, Italy.

International Journal of Molecular Sciences
|March 28, 2026
PubMed
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Diabetic hyperglycemia damages blood vessels by causing endothelial dysfunction through various molecular pathways. Understanding these mechanisms, including novel factors like ACE2 protein, is key to preventing diabetic vascular complications.

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ACE2CVDdiabetesendothelial dysfunctionhyperglycemia

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Area of Science:

  • Cardiovascular Research
  • Endocrinology
  • Molecular Biology

Background:

  • Diabetes mellitus is a major risk factor for cardiovascular disease and microvascular complications.
  • Chronic hyperglycemia is strongly linked to endothelial dysfunction, a precursor to cardiovascular issues.
  • Endothelial dysfunction involves a shift from a protective to an injury-prone state.

Purpose of the Study:

  • To review classical and emerging mechanisms linking diabetic hyperglycemia to endothelial dysfunction.
  • To highlight the role of hyperglycemia in promoting endothelial dysfunction.
  • To explore potential therapeutic targets for mitigating diabetic vascular complications.

Main Methods:

  • Literature review of classical and emerging pathogenetic mechanisms.
  • Analysis of molecular pathways involved in hyperglycemia-induced endothelial dysfunction.
  • Discussion of the role of factors such as ACE2 protein.

Main Results:

  • Hyperglycemia triggers endothelial dysfunction via altered bioenergetics, advanced glycation end products, oxidative stress, and mitochondrial dysfunction.
  • These mechanisms lead to reduced nitric oxide production, increased oxidative stress, and inflammation, impairing endothelial homeostasis.
  • Emerging evidence points to the ACE2 protein as a potential protective factor against hyperglycemia-induced damage.

Conclusions:

  • Diabetic hyperglycemia significantly contributes to endothelial dysfunction through multiple classical and novel pathways.
  • Understanding these molecular interconnections is crucial for developing effective therapeutic strategies.
  • Targeting pathways involved in endothelial dysfunction may restore homeostasis and reduce diabetic vascular complications.