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Stimulation of gastric acid secretion by central administration of FMRFamide in rats
1Department of Pharmaceutical Sciences, Nagpur University.
Abstract:
The possible role of centrally administered tetrapeptide FMRFamide (Phe-Met-Arg-Phe-NH2) on gastric acid secretion in pylorus ligated rats was investigated. Intracerebroventricularly administered FMRFamide stimulated the gastric acid secretion in a dose-dependent manner. This stimulatory effect was abolished by vagotomy and atropine pretreatment. The presence of FMRFamide in rat brain and the ability of FMRFamide to stimulate gastric acid secretion suggest that FMRFamide plays a physiological role in brain modulation of gastric acid secretion.
Insights
Central FMRFamide (Phe-Met-Arg-Phe-NH2) administration stimulates gastric acid secretion in rats. This effect, mediated by the vagus nerve and acetylcholine, suggests FMRFamide
Area of Science:
- Neuroendocrinology
- Gastroenterology
- Peptide research
Background:
- The neuropeptide FMRFamide (Phe-Met-Arg-Phe-NH2) is present in the mammalian brain.
- Its role in regulating physiological functions, including gastrointestinal processes, is under investigation.
Purpose of the Study:
- To investigate the central effects of FMRFamide on gastric acid secretion.
- To determine the neural pathways involved in FMRFamide-induced gastric acid secretion.
Main Methods:
- Administration of FMRFamide intracerebroventricularly in pylorus-ligated rats.
- Assessment of gastric acid secretion.
- Evaluation of the effects of vagotomy and atropine pretreatment.
Main Results:
- Intracerebroventricular FMRFamide significantly stimulated gastric acid secretion in a dose-dependent manner.
- The stimulatory effect of FMRFamide was abolished by vagotomy.
- Atropine pretreatment also abolished the stimulatory effect of FMRFamide.
Conclusions:
- Centrally administered FMRFamide stimulates gastric acid secretion in rats.
- The vagus nerve and cholinergic pathways are involved in this FMRFamide-mediated stimulation.
- These findings suggest a physiological role for FMRFamide in the central modulation of gastric acid secretion.