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Updated: Jul 13, 2026
09:40
Organoid-Derived Epithelial Monolayer: A Clinically Relevant In Vitro Model for Intestinal Barrier Function
Published on: July 29, 2021
Intestinal cells produce basement membrane proteins in vitro
1Dept of Medicine, Steglitz Medical School, West Berlin, FRG.
Gut
|January 1, 1987
Summary
The intestinal epithelial-mesenchymal interface is crucial for mucosal architecture. Developing an authentic basement membrane requires both epithelial and mesenchymal cells for intestinal development.
Area of Science:
- Gastroenterology
- Developmental Biology
- Tissue Engineering
Background:
- The epithelial-mesenchymal interface is vital for intestinal mucosal architecture.
- The precise role in epithelial cell migration and differentiation is unclear.
- The origin of subepithelial connective tissue remains unknown.
Purpose of the Study:
- To establish an in vitro model for studying the endodermal-mesenchymal interface in fetal human and murine intestinal mucosa.
- To investigate the development of the basement membrane and interstitial collagens.
Main Methods:
- Immunohistochemistry was used to analyze collagen types I, III, VI, procollagen type III, collagen type IV, and laminin distribution.
- Fetal intestinal explant cultures were established and adapted to serum-free conditions.
- Electron microscopy and brush border enzyme activity assays were employed.
Main Results:
- Laminin and collagen type IV were present in primary intestinal epithelium.
- Authentic basement membrane formation necessitated both epithelial and mesenchymal cells.
- Mesenchymal cells exclusively produced interstitial collagens and procollagen type III.
- Basement membrane formation correlated with endodermal cell cytodifferentiation.
Conclusions:
- The maturation of the endoderm and subepithelial basement membrane formation depend on close proximity to viable mesenchyme in vitro.
- This study elucidates the critical role of mesenchymal cells in intestinal basement membrane development.
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