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Bronchial epithelium associated to lymphoid tissue does not selectively express vimentin
L M Alonso1, A Cortés, M G Barrutia
1Department of Cell Biology, Faculty of Biology, Complutense University, Madrid, Spain.
Histology and Histopathology
|September 26, 1997
Summary
This study investigated M cells in bronchus-associated lymphoid tissue (BALT) using vimentin markers. Researchers found no M cells expressing vimentin in rat BALT or Peyer
Area of Science:
- Immunology
- Cell Biology
- Histology
Background:
- The presence of M cells in bronchus-associated lymphoid tissue (BALT) has been debated.
- Previous ultrastructural studies failed to identify M cells in rat BALT epithelium.
Purpose of the Study:
- To immunohistochemically investigate vimentin expression as a marker for M cells in rat BALT and Peyer's patches.
- To clarify the cellular composition of the lymphoepithelium in these tissues.
Main Methods:
- Immunohistochemical analysis of vimentin expression.
- Examination of both bronchus-associated lymphoid tissue (BALT) and Peyer's patches.
- Assessment of cytokeratin expression in the epithelia.
Main Results:
- Vimentin expression, a marker for rabbit M cells, was absent in the epithelium covering rat BALT and Peyer's patches.
- Both epithelia strongly expressed cytokeratin.
- Numerous vimentin-positive lymphocytes were observed in both lymphoid organs.
Conclusions:
- The epithelium covering rat BALT and Peyer's patches does not contain M cells expressing vimentin.
- The findings contribute to understanding the relationship between BALT and mucosae-associated lymphoid tissue (MALT).