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Acid releases motilin from human duodenum in vitro
Acta Hepato-Gastroenterologica
|December 1, 1977
Summary
Acidic conditions significantly increase motilin peptide secretion from human duodenal tissue in vitro. This study demonstrates a novel method for investigating gastrointestinal hormone release mechanisms.
Area of Science:
- Gastroenterology
- Endocrinology
- Physiology
Background:
- Motilin is a gastrointestinal hormone regulating gastric motility and emptying.
- Understanding the regulation of motilin release is crucial for gastrointestinal research.
Purpose of the Study:
- To investigate the in vitro effect of acid and alkali on motilin release from human duodenal mucosa.
- To establish a perfusion system for studying gastrointestinal hormone release.
Main Methods:
- Human duodenal mucosa was incubated in a perfusion chamber system.
- Tissue was exposed to hydrochloric acid (acidification) and sodium hydroxide (alkalinization).
- Motilin levels in the perfusate were quantified using radioimmunoassay.
Main Results:
- Alkalinization (sodium hydroxide) completely inhibited basal motilin release.
- Acidification (hydrochloric acid) stimulated a 14-fold increase in motilin secretion.
- The perfusion system proved effective for monitoring peptide release.
Conclusions:
- Acidity is a potent stimulator of motilin release from the duodenal mucosa in vitro.
- The described perfusion system is a valuable tool for studying gastrointestinal hormone secretion mechanisms.