Gamma-hydroxybutyrate increases gastric emptying in rats

Area of Science:

• Pharmacology
• Gastroenterology
• Neuroscience

Background:

• Gamma-hydroxybutyrate (GHB) is a substance with complex physiological effects.
• Its precise role in regulating gastrointestinal motility, specifically gastric emptying, remains incompletely understood.

Purpose of the Study:

• To investigate the influence of GHB and its receptor antagonist, NCS-382, on gastric emptying in a rat model.
• To determine if GHB or its metabolites play a role in regulating rat stomach motility.

Main Methods:

• Gastric emptying was assessed in rats by measuring serum acetaminophen levels over time after oral administration.
• The effects of various oral and intraperitoneal doses of GHB and NCS-382 were evaluated.
• Acetaminophen remaining in the stomach after 30 minutes was also quantified.

Main Results:

• The highest dose of GHB significantly accelerated gastric emptying, as evidenced by increased serum acetaminophen levels.
• NCS-382 demonstrated a dose-dependent delay in gastric emptying, confirmed by both serum levels and stomach content analysis.
• NCS-382 effectively antagonized the prokinetic effect of GHB on gastric emptying.

Conclusions:

• GHB administration accelerates gastric emptying in rats.
• NCS-382 delays gastric emptying and antagonizes GHB's effects, suggesting a role for GHB and/or its metabolites in regulating rat stomach motility.