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Related Concept Videos

Hormones Regulating Blood Glucose01:16

Hormones Regulating Blood Glucose

Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
In addition to accelerating glucose uptake and utilization, insulin has...
Glucose Homeostasis: Regulation of Blood Glucose01:02

Glucose Homeostasis: Regulation of Blood Glucose

Carbohydrates consumed through foods are converted into glucose, a crucial energy source for the body. In the prandial state, high blood glucose levels stimulate the secretion of insulin from the pancreas. Insulin inhibits hepatic glucose production and stimulates glucose uptake and metabolism by muscle and adipose tissue. The excess glucose is converted into glycogen and stored in the liver and muscles.
During fasting, when blood glucose levels are low, the pancreas secretes glucagon. it...
cAMP-dependent Protein Kinase Pathways01:25

cAMP-dependent Protein Kinase Pathways

Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
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...
Glucagon-like Receptor Agonists01:24

Glucagon-like Receptor Agonists

Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by the...
Glucose Absorption Into the Small Intestine01:26

Glucose Absorption Into the Small Intestine

Complex carbohydrates consumed cannot be absorbed into the small intestine in their original form. First, they must be hydrolyzed to a monosaccharide form such as glucose or galactose. These monosaccharides are then transported across the intestinal membrane and into the blood via transcellular transport. The intestinal epithelial cells allow the movement of these monosaccharides with a defined 'entry' through membrane transporter proteins present on their apical membrane and 'exit' via the...

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Updated: Jul 6, 2026

Alternate Immersion in Glucose to Produce Prolonged Hyperglycemia in Zebrafish
05:49

Alternate Immersion in Glucose to Produce Prolonged Hyperglycemia in Zebrafish

Published on: May 5, 2021

Could glucose be a proaging factor?

Eva Kassi1, Athanasios G Papavassiliou

  • 1Department of Biological Chemistry, Medical School, University of Athens, Athens, Greece.

Journal of Cellular and Molecular Medicine
|April 11, 2008
PubMed
Summary
This summary is machine-generated.

Glucose metabolism significantly impacts aging. This review explores how glucose regulates key aging factors like autophagy, sirtuin activity, and oxidative stress, influencing lifespan.

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Last Updated: Jul 6, 2026

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Area of Science:

  • Gerontology
  • Molecular Biology
  • Metabolism

Background:

  • Scientific interest is growing in how the cellular environment affects aging.
  • Calorie restriction is known to influence longevity, but the precise molecular mechanisms are unclear.
  • Nutrients, particularly glucose, play a critical role in cellular signaling pathways that modulate lifespan.

Purpose of the Study:

  • To investigate the potential role of glucose in the aging process.
  • To explore how glucose metabolism and insulin secretion regulate aging modulators.
  • To examine the link between glucose availability and lifespan.

Main Methods:

  • Review of existing scientific literature on glucose metabolism and aging.
  • Analysis of molecular mechanisms linking glucose to autophagy, sirtuins, oxidative stress, and AGEs.
  • Discussion of direct and indirect regulatory roles of glucose.

Main Results:

  • Glucose catabolism via glycolysis provides ATP but consumes NAD.
  • Evidence suggests decreased glucose availability may increase lifespan.
  • Impaired glucose metabolism is linked to extended life expectancy.

Conclusions:

  • Glucose, through its metabolism or insulin secretion, directly and indirectly regulates key aging pathways.
  • Understanding glucose's role is crucial for developing interventions to modulate aging.
  • Further research is needed to fully elucidate the complex relationship between glucose and longevity.