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Updated: Jun 13, 2026
10:22
In Vitro and In Vivo Approaches to Determine Intestinal Epithelial Cell Permeability
Published on: October 19, 2018
Lysophosphatidylcholine increases rat ileal permeability to macromolecules
Gut
|April 1, 1985
Summary
Lysophosphatidylcholine (LPC) damages the ileal mucosa, increasing intestinal permeability to macromolecules like dextrans and bovine serum albumin (BSA). Higher LPC concentrations elevate lysosomal enzyme activity, potentially impairing gut barrier function.
Area of Science:
- Gastroenterology
- Cell Biology
- Biochemistry
Background:
- Lysophosphatidylcholine (LPC) is a naturally occurring surfactant in the intestine.
- The role of LPC in regulating intestinal macromolecular permeability is not fully understood.
Purpose of the Study:
- To investigate the influence of LPC on macromolecular permeability in the distal ileum.
- To examine the effects of LPC on ileal mucosal morphology and lysosomal enzyme activity.
Main Methods:
- A rat experimental model was used to assess intestinal permeability to dextrans and BSA.
- Ileal mucosal morphology was examined after LPC deposition.
- Enzyme activities (N-acetyl-beta-glucosaminidase, 5'-nucleotidase, alkaline phosphatase) were measured in mucosal cells exposed to varying LPC concentrations.
Main Results:
- 20 mM LPC significantly damaged the ileal mucosa, increasing permeability to all tested molecules.
- LPC exposure (0.01-1 mM) led to increased N-acetyl-beta-glucosaminidase activity in mucosal cells, dose-dependently.
- Higher LPC concentrations correlated with increased lysosomal enzyme activity.
Conclusions:
- LPC can damage intestinal mucosal cells and release lysosomal enzymes.
- Elevated LPC concentrations may compromise the mucosal barrier, increasing gut permeability to macromolecules.
- These findings suggest a potential role for LPC in diseases characterized by increased macromolecular absorption.
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