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Related Concept Videos

Diabetic Neuropathy01:22

Diabetic Neuropathy

DefinitionDiabetic neuropathy is nerve damage caused by long-standing diabetes mellitus. It results directly from prolonged high blood sugar levels.PathophysiologyThe pathophysiology of diabetic neuropathy involves both metabolic and vascular disturbances triggered by chronic hyperglycemia.Metabolic injury: Elevated glucose levels activate the polyol pathway within nerve cells, leading to the accumulation of sorbitol and fructose. This increases oxidative stress, disrupts normal nerve...
Glucose Transporters01:27

Glucose Transporters

Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
Hypoglycemia and Glucagon01:15

Hypoglycemia and Glucagon

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...
Hyperglycemia01:29

Hyperglycemia

Hyperglycemia is an abnormally high blood glucose level. It is diagnosed by fasting glucose ≥126 mg/dL, 2-hour oral glucose tolerance test (or OGTT) ≥200 mg/dL, random glucose ≥200 mg/dL with symptoms, or HbA1c ≥6.5%. However, HbA1c results may be unreliable in certain conditions, such as anemia or hemoglobinopathies, and the diagnosis should be confirmed unless classic symptoms are present. Postprandial hyperglycemia is typically considered significant when glucose levels exceed 180 mg/dL two...
Hypoglycemia01:26

Hypoglycemia

Hypoglycemia is a blood glucose level below 70 mg/dL. It commonly occurs in individuals using insulin or insulin-secreting drugs, but may also arise in non-diabetic conditions. People with type 1 diabetes are at the highest risk because they depend on exogenous insulin. People with type 2 diabetes are also at risk, especially when treated with insulin or medications such as sulfonylureas, which increase insulin release regardless of blood glucose levels. It develops when insulin levels exceed...
Hepatic Encephalopathy01:29

Hepatic Encephalopathy

DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic shunting—including...

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Related Experiment Video

Updated: Jul 9, 2026

Measuring Uptake of the Glucose Analog, 6-(N-(7-Nitrobenz-2-Oxa-1,3-Diazol-4-yl)Amino)-6-Deoxyglucose, in Intact Murine Neural Retina
07:04

Measuring Uptake of the Glucose Analog, 6-(N-(7-Nitrobenz-2-Oxa-1,3-Diazol-4-yl)Amino)-6-Deoxyglucose, in Intact Murine Neural Retina

Published on: March 14, 2025

Glucose neurotoxicity.

David R Tomlinson1, Natalie J Gardiner

  • 1Faculty of Life Sciences, University of Manchester, Oxford Road, Manchester, M13 9PT, UK. david.tomlinson@manchester.ac.uk

Nature Reviews. Neuroscience
|December 21, 2007
PubMed
Summary

Neurons require constant glucose and cannot regulate it with insulin like muscle cells. Persistent high blood sugar (hyperglycemia) causes glucose neurotoxicity, explaining key aspects of diabetic neuropathy.

Area of Science:

  • Neuroscience
  • Endocrinology
  • Metabolic disorders

Background:

  • Neurons have a high, constant demand for glucose.
  • Unlike muscle cells, neurons do not uptake glucose episodically via insulin.
  • Extracellular glucose concentration directly impacts neuronal glucose uptake.

Purpose of the Study:

  • To review the pathophysiological effects of elevated glucose on neurons.
  • To explain how glucose neurotoxicity contributes to diabetic neuropathy.

Main Methods:

  • Literature review of pathophysiological mechanisms.
  • Analysis of glucose metabolism in neurons.
  • Correlation of hyperglycemic effects with diabetic neuropathy symptoms.

Main Results:

More Related Videos

A Neuronal and Astrocyte Co-Culture Assay for High Content Analysis of Neurotoxicity
15:04

A Neuronal and Astrocyte Co-Culture Assay for High Content Analysis of Neurotoxicity

Published on: May 5, 2009

Related Experiment Videos

Last Updated: Jul 9, 2026

Measuring Uptake of the Glucose Analog, 6-(N-(7-Nitrobenz-2-Oxa-1,3-Diazol-4-yl)Amino)-6-Deoxyglucose, in Intact Murine Neural Retina
07:04

Measuring Uptake of the Glucose Analog, 6-(N-(7-Nitrobenz-2-Oxa-1,3-Diazol-4-yl)Amino)-6-Deoxyglucose, in Intact Murine Neural Retina

Published on: March 14, 2025

A Neuronal and Astrocyte Co-Culture Assay for High Content Analysis of Neurotoxicity
15:04

A Neuronal and Astrocyte Co-Culture Assay for High Content Analysis of Neurotoxicity

Published on: May 5, 2009

  • Persistent hyperglycemia leads to glucose neurotoxicity.
  • This neurotoxicity damages neurons due to their unique glucose dependency.
  • The mechanisms of glucose neurotoxicity explain major diabetic neuropathy components.

Conclusions:

  • Understanding neuronal glucose metabolism is crucial for managing diabetic complications.
  • Glucose neurotoxicity is a key pathway in the development of diabetic neuropathy.
  • Targeting neuronal glucose regulation may offer therapeutic strategies for diabetic neuropathy.