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Related Concept Videos

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...
Dipeptidyl Peptidase 4 Inhibitors01:23

Dipeptidyl Peptidase 4 Inhibitors

Dipeptidyl peptidase 4 (DPP-4) is a serine protease widely distributed in the body. It's involved in the inactivation of GLP-1 and GIP hormones, which are crucial for insulin regulation. DPP-4 inhibitors, such as sitagliptin (Januvia), saxagliptin (Onglyza), linagliptin (Tradjenta), alogliptin (Nesina), and vildagliptin (Galvus), help increase the proportion of active GLP-1, enhancing insulin secretion. These inhibitors work by competitively binding to DPP-4. This binding causes a significant...
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...
Oral Hypoglycemic Agents: α-Glucosidase Inhibitors01:19

Oral Hypoglycemic Agents: α-Glucosidase Inhibitors

α-glucosidase inhibitors, including acarbose (Precose), miglitol (Glyset), and voglibose (Voglib) (primarily available in Asia), are drugs that control blood sugar levels by delaying the digestion of starch and disaccharides. They achieve this by inhibiting α-glucosidase enzymes in the intestine, which slow the absorption of carbohydrates in the intestine, which in turn leads to a prolonged release of the glucoregulatory hormone GLP-1 from intestinal L-cells.
Acarbose and miglitol are typically...
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...
CNS Depressants: Alcohol and Nicotine01:27

CNS Depressants: Alcohol and Nicotine

Ethanol, a clear colorless alcohol, has been consumed by humans for millennia, but its effects on the body are far from benign. At lower doses, it induces decreased inhibitions and loquaciousness, leading to its social appeal. However, it can cause severe consequences at higher doses, such as coma and respiratory depression, due to its zero-order elimination kinetics. Chronic ethanol abuse wreaks havoc on multiple organ systems, particularly the CNS and the liver. Abrupt cessation of ethanol...

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Updated: May 12, 2026

Investigating Drivers of Antireward in Addiction Behavior with Anatomically Specific Single-Cell Gene Expression Methods
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Published on: August 4, 2022

Gut peptide GLP-1 and its analogue, Exendin-4, decrease alcohol intake and reward.

Rozita H Shirazi1, Suzanne L Dickson, Karolina P Skibicka

  • 1Department of Physiology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.

Plos One
|April 25, 2013
PubMed
Summary
This summary is machine-generated.

Glucagon-like-peptide-1 (GLP-1) signaling in the brain

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Area of Science:

  • Neuroscience
  • Endocrinology
  • Pharmacology

Background:

  • Glucagon-like-peptide-1 (GLP-1) is a peptide hormone involved in glucose metabolism and appetite regulation.
  • GLP-1 receptors (GLP-1R) are present in brain reward pathways, including the ventral tegmental area (VTA).
  • GLP-1 influences food reward, and its pathways overlap with those regulating alcohol reward.

Purpose of the Study:

  • To investigate the role of GLP-1 and GLP-1R in regulating alcohol intake and reward.
  • To determine if GLP-1 or its analogue Exendin-4 reduce alcohol consumption and seeking behavior.
  • To explore the effect of blocking GLP-1R on alcohol intake and the impact of VTA GLP-1R activation.

Main Methods:

  • Administered GLP-1 or Exendin-4 to rats and mice to assess effects on alcohol intake and reward.
  • Used a GLP-1R antagonist (Exendin 9-39) to evaluate the role of endogenous GLP-1.
  • Microinjected GLP-1 or Exendin-4 directly into the VTA of rats to assess VTA-specific effects.
  • Utilized an alcohol conditioned place preference test in mice to measure alcohol reward.

Main Results:

  • Peripheral administration of GLP-1 or Exendin-4 significantly reduced alcohol intake in rats.
  • Blocking GLP-1R with Exendin 9-39 increased alcohol intake, suggesting a role for endogenous GLP-1.
  • GLP-1 administration decreased alcohol reward in mice.
  • Direct stimulation of GLP-1R in the VTA potently reduced alcohol intake.

Conclusions:

  • GLP-1R signaling is a novel modulator of alcohol intake and reward.
  • Activation of GLP-1R in the VTA effectively reduces alcohol consumption.
  • The GLP-1 system represents a promising therapeutic target for alcohol use disorders, given the clinical availability of GLP-1 analogues.