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Quantitative electron microscopic studies on rat ileal Paneth cells under various physiological and experimental
Hepato-Gastroenterology
|August 1, 1980
Summary
Paneth cells in rat ileum were examined. Secretory granules changed in size and amount with certain treatments, suggesting altered secretion rates in response to pilocarpine, atropine, sympathectomy, and intestinal surgery.
Area of Science:
- Gastroenterology
- Cell Biology
- Histology
Background:
- Paneth cells are crucial for intestinal immunity and host defense.
- Their secretory function is vital for maintaining the intestinal environment.
- Understanding Paneth cell regulation is key to addressing gastrointestinal disorders.
Purpose of the Study:
- To investigate the quantitative changes in Paneth cell secretory granules.
- To assess the impact of pharmacological and surgical interventions on Paneth cell secretion.
- To correlate granule morphology with secretory activity.
Main Methods:
- Quantitative electron microscopy was employed to analyze Paneth cells.
- Measurements included cell and nucleus volume, and secretory granule diameter and density.
- Rats were subjected to various treatments: fasting, pilocarpine, atropine, chemical sympathectomy, and intestinal resection.
Main Results:
- Secretory granules remained unchanged in fasted and non-fasted control rats.
- Atropine treatment led to increased granule amounts, suggesting reduced secretion.
- Pilocarpine treatment and intestinal surgery resulted in smaller granules, indicating increased secretion.
Conclusions:
- Pharmacological and surgical manipulations significantly alter Paneth cell secretory granule characteristics.
- Changes in granule size and density reflect varying rates of secretion.
- These findings provide insights into the dynamic regulation of Paneth cell function in the rat ileum.