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Updated: May 8, 2026
08:15
Gastrointestinal Motility Monitor (GIMM)
Published on: December 2, 2010
5-Hydroxytryptamine and cholera secretion: a histochemical and physiological study in cats
Gut
|June 1, 1983
Summary
Cholera toxin significantly reduces 5-hydroxytryptamine (5-HT) in cat intestinal cells, impacting fluid transport. This finding suggests a role for enterochromaffin cells in cholera
Area of Science:
- Gastroenterology
- Cell Biology
- Microbiology
Background:
- Enterochromaffin cells in the small intestine produce serotonin (5-hydroxytryptamine, 5-HT).
- Cholera toxin disrupts intestinal fluid balance, leading to secretion.
Purpose of the Study:
- To investigate the effect of cholera toxin on 5-HT levels in feline intestinal enterochromaffin cells.
- To correlate changes in 5-HT content with intestinal fluid transport rates.
Main Methods:
- Cytofluorimetry was used to measure 5-HT content in individual enterochromaffin cells.
- Intestinal segments were exposed to cholera toxin or heat-inactivated toxin.
- Net fluid transport across the intestinal epithelium was measured.
Main Results:
- Cholera toxin exposure led to a statistically significant decrease in 5-HT levels compared to controls.
- A strong positive correlation (r = 0.73) was observed between 5-HT fluorescence and net fluid transport.
- Reduced 5-HT content was linked to decreased fluid absorption or increased secretion.
Conclusions:
- Cholera toxin diminishes 5-HT content in enterochromaffin cells.
- Enterochromaffin cell 5-HT levels are closely associated with intestinal fluid transport dynamics.
- A hypothesis is proposed for the role of enterochromaffin cells in cholera pathophysiology.
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