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Related Concept Videos

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...
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...
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...
Regulation of Food Intake01:30

Regulation of Food Intake

Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
Glucose Homeostasis: Pancreatic Islets and Insulin Secretion01:27

Glucose Homeostasis: Pancreatic Islets and Insulin Secretion

The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are co-secreted in...
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...

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Related Experiment Video

Updated: Jun 3, 2026

A RAPID Method for Blood Processing to Increase the Yield of Plasma Peptide Levels in Human Blood
11:36

A RAPID Method for Blood Processing to Increase the Yield of Plasma Peptide Levels in Human Blood

Published on: April 28, 2016

Ghrelin and glucose homeostasis.

P J D Delhanty1, A J van der Lely

  • 1Department of Internal Medicine, Erasmus MC, 3000 CA Rotterdam, The Netherlands. p.delhanty@erasmusmc.nl

Peptides
|March 15, 2011
PubMed
Summary

Ghrelin impacts growth hormone and insulin secretion, but also promotes obesity and diabetes. Blocking ghrelin may prevent diabetes, though research into its complex role and therapeutic strategies is ongoing.

Area of Science:

  • Endocrinology
  • Metabolic Research
  • Physiology

Background:

  • Ghrelin is a key hormone regulating growth hormone (GH) and insulin secretion, and glucose metabolism.
  • It plays a role in the physiological response to fasting and energy balance.
  • Pharmacological studies highlight ghrelin's obesogenic and diabetogenic properties, potentially linked to energy storage during food scarcity.

Purpose of the Study:

  • To explore the physiological roles of ghrelin in metabolism and its implications for diabetes.
  • To review the potential of ghrelin blockade as a therapeutic strategy for metabolic disorders.
  • To discuss alternative approaches like targeting the ghrelin/des-acyl ghrelin ratio and GOAT activity.

Main Methods:

  • Review of existing physiological and pharmacological studies on ghrelin.

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Body Composition and Metabolic Caging Analysis in High Fat Fed Mice
10:28

Body Composition and Metabolic Caging Analysis in High Fat Fed Mice

Published on: May 24, 2018

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Live Images of GLUT4 Protein Trafficking in Mouse Primary Hypothalamic Neurons Using Deconvolution Microscopy
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10:28

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Published on: May 24, 2018

  • Analysis of correlations between ghrelin levels and type 2 diabetes/insulin resistance.
  • Evaluation of therapeutic strategies including ghrelin receptor antagonism and modulation of ghrelin acylation.
  • Main Results:

    • Ghrelin influences pancreatic islet function and glucose homeostasis.
    • A negative correlation exists between ghrelin levels and type 2 diabetes/insulin resistance, though causality is unclear.
    • Ghrelin receptor antagonism can lead to weight gain, necessitating alternative strategies.

    Conclusions:

    • Ghrelin blockade shows potential for preventing diabetogenic effects, but direct antagonism has drawbacks.
    • Modulating the ghrelin/des-acyl ghrelin ratio and blocking GOAT activity are promising alternative therapeutic avenues.
    • Further investigation into the long-term effects of these novel treatments is required.